1. A method for preparing shield tail sealing grease is characterized by comprising the following steps:

step 1, preparing base oil, fiber, lubricating grease, a viscosity improver and bentonite according to a preset feeding proportion, and then performing pre-preparation;

and 2, adding a filler into the prefabricated product prepared in the step 1 according to a preset proportion, and kneading and stirring for 40-90 min under a vacuum condition to prepare the shield tail sealing grease.

2. The method for preparing the shield tail sealing grease of claim 1, wherein the step 1 comprises the following steps:

step 1.1, determining the feeding proportion of base oil, fiber, lubricating grease, viscosity improver and bentonite;

step 1.2, uniformly mixing base oil, fibers and lubricating grease in proportion;

step 1.3, adding the viscosity improver into the product prepared in the step 1.2 according to the proportion, and then uniformly mixing;

and step 1.4, putting bentonite into the product prepared in the step 1.3 according to the proportion, and then uniformly mixing to obtain the prefabricated product.

3. The method for preparing shield tail sealing grease of claim 1, wherein the method comprises the following steps: the kneading time in the step 1.1 is 30min-60 min; or/and

the kneading time in the step 1.2 is 30-60 min; or/and

the kneading time in the step 1.3 is 30-60 min; or/and

the kneading environment in the step 1.1 is 20-40 ℃; or/and

the kneading environment in the step 1.2 is 20-40 ℃; or/and

the kneading environment in the step 1.3 is 20-40 ℃; or/and

the temperature of the kneading environment in at least one of the step 1.1, the step 1.2, the step 1.3, and the step 2 is a constant value.

4. A method for preparing shield tail sealing grease according to any one of claims 1-3, wherein: the preparation condition adopted in the step 1 is a vacuum environment.

5. An apparatus for preparing shield tail sealing grease, comprising:

the kneader comprises a kneader body (1), wherein the kneader body (1) comprises a cylinder body (11), and an operation cavity (12) and a vacuum generating piece (13) communicated with the operation cavity (12) are arranged on the cylinder body (1);

the cover (2), the cover (2) is movably connected with the cylinder body (11), and the cover (2) can seal the working cavity (12); and

the material containing part (3) comprises a material containing barrel (31) connected with the cover (2), a switch part (32) capable of controlling the material containing barrel (31) to be communicated with the operation cavity (12), and a pressure regulating part (33) for regulating the pressure intensity of a material containing space of the material containing barrel (31); the charging barrel (31) is connected with the vacuum generating piece (13) through a pipeline.

6. The apparatus for preparing shield tail seal grease according to claim 5, wherein the pressure regulating member (33) comprises:

a piston (331), said piston (331) being adapted to said working chamber (12); and

a drive rod (332), wherein the drive rod (332) is connected with the material containing barrel (31), and the drive rod (332) is used for driving the piston (331) to move.

7. The apparatus for preparing shield tail seal grease according to claim 6, wherein the switch member (32) comprises:

the movable plate (321), the movable plate (321) is movably connected with the material containing barrel (31);

one end of the adjusting rod (322) is movably connected with the movable plate (321), the other end of the adjusting rod (322) penetrates through the piston (331) to be a free end, and the adjusting rod (322) is rotatably connected with the piston (331);

the rotating plate (323), the said rotating plate (323) is connected with said regulating lever (322); and

the power piece (324), the power piece (324) is connected with the adjusting rod (322), and the power piece (324) is used for driving the adjusting rod (322) to be separated from the movable plate (321) or/and driving the adjusting rod (322) to rotate.

8. The apparatus for preparing shield tail sealing grease according to claim 7, characterized in that the adjusting rod (322) comprises:

the first sleeve (3221) is provided with a first groove (5), and the first sleeve (3221) is rotatably connected with the power part (324);

a second sleeve (3222), a part of the second sleeve (3222) is connected with the side wall of the first groove (5) in a sliding mode, and one end of the second sleeve (3222) can penetrate through the piston (331); the second sleeve (3222) is movably connected with the power piece (324);

one end of the spring (3223) is connected with the inner wall of the first groove (5), and the other end of the spring (3223) is connected with the second sleeve (3222); and

the connecting piece (3224) is connected with the second sleeve (3222), and the connecting piece (3224) is detachably connected with the movable plate (321).

9. The equipment for preparing shield tail sealing grease according to claim 5, characterized by further comprising a temperature control assembly (4) capable of adjusting the temperature in the working cavity (12).

10. The apparatus for preparing shield tail sealing grease according to claim 5, wherein: and a transparent observation window is arranged on the machine cover (2).

Background

With the rapid development of modern social economy, various traffic facilities are increasingly complete, and the shield tunneling machine plays a significant role in the process, particularly in the development of underground traffic such as subway construction. In shield construction, shield tail sealing is a key link, and shield tail sealing grease is filled in a gap of a steel wire brush of the shield tail, so that the shield tail and pipe pieces are effectively lubricated, a certain sealing effect can be achieved, and the influence of slurry infiltration in a soil layer on the normal operation of a shield machine is prevented.

The shield tail sealing grease special for the shield machine is produced by a process of respectively grinding raw materials, uniformly mixing the raw materials in a kneader and discharging the mixture to obtain a finished product. The shield tail sealing grease prepared by the prior art and equipment has the technical problems of gas generation, insufficient interface activation degree and unstable product performance.

Disclosure of Invention

The invention aims to provide a method and equipment for preparing shield tail sealing grease, and aims to solve the technical problems that the grease produced by the existing production method and equipment generates gas, the interface activation degree is not enough, and the product performance is unstable.

In order to achieve the purpose, the invention adopts the technical scheme that: the method for preparing the shield tail sealing grease comprises the following steps:

step 1, preparing base oil, fiber, lubricating grease, a viscosity improver and bentonite according to a preset feeding proportion, and then performing pre-preparation;

and 2, adding a filler into the prefabricated product prepared in the step 1 according to a preset proportion, and kneading and stirring for 40-90 min under a vacuum condition to prepare the shield tail sealing grease.

Preferably, the step 1 comprises:

step 1.1, determining the feeding proportion of base oil, fiber, lubricating grease, viscosity improver and bentonite;

step 1.2, uniformly mixing base oil, fibers and lubricating grease in proportion;

step 1.3, adding the viscosity improver into the product prepared in the step 1.2 according to the proportion, and then uniformly mixing;

and step 1.4, putting bentonite into the product prepared in the step 1.3 according to the proportion, and then uniformly mixing to obtain the prefabricated product.

Preferably, the kneading time of step 1.1 is from 30min to 60 min; or/and

the kneading time in the step 1.2 is 30-60 min; or/and

the kneading time in the step 1.3 is 30-60 min; or/and

the kneading environment in the step 1.1 is 20-40 ℃; or/and

the kneading environment in the step 1.2 is 20-40 ℃; or/and

the kneading environment in the step 1.3 is 20-40 ℃; or/and

the temperature of the kneading environment in at least one of the step 1.1, the step 1.2, the step 1.3, and the step 2 is a constant value.

Preferably, the preparation conditions adopted in the step 1 are vacuum environment.

The invention also provides equipment for preparing the shield tail sealing grease, which is characterized by comprising the following components:

the kneading machine comprises a kneading machine body, wherein the kneading machine body comprises a cylinder body, and an operation cavity and a vacuum generating piece communicated with the operation cavity are arranged on the cylinder body;

the cover is movably connected with the cylinder body and can seal the operation cavity; and

the material containing part comprises a material containing barrel connected with the machine cover, a switch part capable of controlling the material containing barrel to be communicated with the operation cavity, and a pressure regulating part for regulating the pressure intensity of a material containing space of the material containing barrel; the material containing barrel is connected with the vacuum generating piece through a pipeline.

Preferably, the pressure adjusting part includes:

a piston adapted to the working chamber; and

the driving rod is connected with the material containing barrel and used for driving the piston to move.

Preferably, the switching piece includes:

the movable plate is movably connected with the material containing barrel;

one end of the adjusting rod is movably connected with the movable plate, the other end of the adjusting rod penetrates through the piston to be a free end, and the adjusting rod is rotatably connected with the piston;

the rotating plate is connected with the adjusting rod; and

the power part is connected with the adjusting rod and used for driving the adjusting rod to be separated from the movable plate or/and driving the adjusting rod to rotate.

Preferably, the adjusting lever includes:

the first sleeve is provided with a first groove and is rotationally connected with the power part;

a second sleeve, wherein a part of the second sleeve is connected with the side wall of the first groove in a sliding way, and one end of the second sleeve can penetrate through the piston; the second sleeve is movably connected with the power part;

one end of the spring is connected with the inner wall of the first groove, and the other end of the spring is connected with the second sleeve; and

the connecting piece, the connecting piece with the second sleeve pipe is connected, the connecting piece with the fly leaf can be dismantled and be connected.

Preferably, the temperature control device also comprises a temperature control assembly capable of adjusting the temperature in the working cavity.

Preferably, a transparent viewing window is arranged on the cover.

The method and the equipment for preparing the shield tail sealing grease have the beneficial effects that: compared with the prior art, the method for preparing the shield tail sealing grease has the advantages that the operating condition of the kneading stage is a vacuum environment, and gas in a final product can be effectively discharged; effective activation of the component interfaces of the final product; the plugging effect of the final product is improved; and the prepared final product has good stability. The invention also provides equipment for preparing the shield tail sealing grease, the material containing piece is arranged to ensure that the whole preparation process of preparing the shield tail sealing grease by using the equipment can be in a vacuum state, and compared with the existing preparation equipment, the equipment is convenient to operate. The materials such as powdery materials and fibers which are easy to generate dust in the kneading process are firstly put into the material containing barrel, then the gravity of the materials is utilized to enable the materials to fall into the operation cavity, other work is not done on the materials, and the dust generated by the materials in the operation cavity when the materials are added is effectively reduced. The vacuum treatment is carried out in the material containing barrel, so that the equipment is always in a vacuum state in the process of preparing the shield tail sealing grease, and the final quality of a prepared product is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a block diagram of a method for preparing shield tail sealing grease according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of an apparatus for preparing shield tail sealing grease according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another apparatus for preparing shield tail sealing grease according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional structural diagram of a cylinder body adopted by another device for preparing shield tail sealing grease provided by the embodiment of the invention;

FIG. 5 is a schematic structural diagram of a material containing part adopted by another device for preparing shield tail sealing grease provided by the embodiment of the invention;

FIG. 6 is a schematic cross-sectional structural view of a material containing part adopted by another device for preparing shield tail sealing grease provided by the embodiment of the invention;

fig. 7 is a schematic cross-sectional structural view of an adjusting rod adopted by another device for preparing shield tail sealing grease provided by the embodiment of the invention.

In the figure: 1. a kneader body; 11. a cylinder body; 12. a working chamber; 13. a vacuum generating member; 2. a machine cover; 3. a material containing part; 31. a material containing barrel; 32. a switch member; 321. a movable plate; 322. adjusting a rod; 3221. a first sleeve; 3222. a second sleeve; 3223. a spring; 3224. a connecting member; 323. a rotating plate; 324. a power member; 33. adjusting a pressing piece; 331. a piston; 332. a drive rod.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 7, a method and an apparatus for preparing shield tail sealing grease according to the present invention will now be described. The method for preparing the shield tail sealing grease comprises the following steps:

s1, preparing the base oil, the fiber, the lubricating grease, the viscosity improver and the bentonite according to a preset feeding proportion, and then performing pre-preparation;

the specific implementation manner of step S1 may be:

s1.1, determining the feeding proportion of base oil, fibers, lubricating grease, a viscosity improver and bentonite;

s1.2, uniformly mixing base oil, fibers and lubricating grease in proportion;

s1.3, adding the viscosity improver into the product prepared by the S1.2 in proportion, and then uniformly mixing;

s1.4, putting bentonite into the product prepared by the S1.3 according to the proportion, and then uniformly mixing to obtain a prefabricated product.

Wherein the kneading time of S1.1 is 30-60 min; or/and

the kneading time in the S1.2 is 30-60 min; or/and

the kneading time in the S1.3 is 30-60 min; or/and

the kneading environment in S1.1 is 20-40 ℃; or/and

the kneading environment in S1.2 is 20-40 ℃; or/and

the kneading environment in S1.3 is 20-40 ℃; or/and

the temperature of the kneading environment in at least one of S1.1, S1.2, S1.3, and S2 is a constant value.

S2, adding the filler into the prefabricated product prepared in the S1 according to a preset proportion, and kneading and stirring for 40-90 min under a vacuum condition to prepare the shield tail sealing grease.

Compared with the prior art, the method for preparing the shield tail sealing grease has the advantages that the operation condition of the method for preparing the shield tail sealing grease at the kneading stage is a vacuum environment, and gas in a final product can be effectively discharged; effective activation of the component interfaces of the final product; the plugging effect of the final product is improved; and the prepared final product has good stability.

The following are exemplary:

example 1:

SS1, preparing base oil, fiber, lubricating grease, viscosity improver and bentonite according to a preset feeding proportion, and then performing pre-preparation; specifically, SS1.1, respectively determining the feeding proportion of base oil, fiber, lubricating grease, viscosity improver and bentonite; SS1.2, uniformly mixing the base oil, the fibers and the lubricating grease in proportion, and kneading for 30min at the temperature of 30 ℃; SS1.3, adding the viscosity improver into a product prepared by SS1.2 in proportion, kneading for 30min at the temperature of 30 ℃, and uniformly mixing; SS1.4, putting bentonite into the product prepared by SS1.3 according to a proportion, kneading for 30min at the temperature of 30 ℃, and uniformly mixing to obtain a prefabricated product.

SS2, adding a filler into the prefabricated product prepared in the step SS1 according to a preset proportion, kneading and stirring for 90min under a vacuum condition, wherein the reaction temperature is constant at 30 ℃, and thus obtaining the shield tail sealing grease.

Example 2:

SSS1, preparing base oil, fiber, lubricating grease, a viscosity improver and bentonite according to a preset feeding proportion, and then performing pre-preparation; specifically, SSS1.1, determining the feeding proportion of base oil, fiber, lubricating grease, viscosity improver and bentonite respectively; SSS1.2, mixing base oil, fiber and lubricating grease uniformly according to a proportion, and kneading for 30min at the temperature of 30 ℃; SSS1.3, then adding the viscosity improver into a product prepared by SSS1.2 in proportion, kneading for 30min at the temperature of 30 ℃, and uniformly mixing; SSS1.4, adding bentonite into a product prepared from SSS1.3 according to a proportion, kneading for 30min at the temperature of 30 ℃, and uniformly mixing to obtain a prefabricated product. Wherein the operation condition of the step SSS1 is a vacuum environment.

SSS2, then adding a filler into the prefabricated product prepared in the step SS1 according to a preset proportion, kneading and stirring for 90min under a vacuum condition, wherein the reaction temperature is constant at 30 ℃, and thus obtaining the shield tail sealing grease.

The present invention also provides an apparatus for preparing shield tail sealing grease, please refer to fig. 2 to 7, which is characterized in that the apparatus comprises: the kneader comprises a kneader body 1, a cover 2 and a material containing part 3, wherein the kneader body 1 comprises a cylinder body 11, and the cylinder body 11 is provided with an operation cavity 12 and a vacuum generating part 13 communicated with the operation cavity 12; the cover 2 is movably connected with the cylinder body 11, and the cover 2 can seal the working cavity 12; the material containing part 3 comprises a material containing barrel 31 connected with the machine cover 2, a switch part 32 capable of controlling the material containing barrel 31 to be communicated with the operation cavity 12 and a pressure regulating part 33 for regulating the pressure intensity of a material containing space of the material containing barrel 31; the cartridge 31 is connected to the vacuum generating element 13 via a line.

Firstly, materials such as powdery materials and fibers which are easy to generate dust in the kneading process are put into a material containing barrel 31, then the material containing barrel 31 is in a vacuum state through a pressure regulating part 33, then base oil and lubricating grease are put into an operation cavity 12, then a cover 2 is covered, the operation cavity 12 is vacuumized through a vacuum generating part 13, and then the materials are released into the operation cavity 12 according to the experimental steps.

Compared with the prior art, the equipment for preparing the shield tail sealing grease has the advantages that the material containing part 3 is arranged, so that the whole preparation process of preparing the shield tail sealing grease by using the equipment can be in a vacuum state, and compared with the existing preparation equipment, the operation is convenient. The materials such as powdery materials and fibers which are easy to generate dust in the kneading process are firstly put into the material containing barrel 31, then the gravity of the materials is utilized to enable the materials to fall into the operation cavity 12, no other work is done on the materials, and the dust generated by the materials in the operation cavity 12 when the materials are added is effectively reduced. The vacuum treatment is carried out in the material containing barrel 31, so that the equipment is always in a vacuum state in the process of preparing the shield tail sealing grease, and the final quality of a prepared product is improved.

The vacuum generator 13 includes an air pump, a vacuum gauge (the vacuum gauge is used to display and monitor the vacuum degree in the cylinder) and a vent valve (used to release negative pressure to recover the atmospheric environment in the cylinder for material taking), the air pump is communicated with the inside of the working chamber 12 through a pipeline, and a closed switch is arranged at one end of the pipeline communicated with the working chamber 12.

The cover 2 is rotatably connected with the cylinder body 11 through the rotating shaft assembly, and a locking piece used for locking the connection relation between the cover 2 and the cylinder body 11 is arranged on the cover 2. When the cover 2 is buckled with the operation cavity 12 of the cylinder body 11, the locking piece is locked, the cover 2 is sealed and covers the operation cavity 12 at the moment, and when the raw materials are kneaded in the operation cavity 12, the raw materials cannot be scattered to the outside. More specifically, mutually-matched sealing rings are respectively arranged on the cover 2 and the opening end of the working cavity 12, so that the sealing effect of the cover 2 for sealing the working cavity 12 is further improved. After kneading the completion, open the breather valve, make the cylinder body resume atmospheric environment, open the locking piece, then drive the motion of cover 2 or the staff lifts cover 2 by oneself through motor drive pivot and then take out final product can.

In this embodiment, the kneader body 1 further comprises a frame which is rotatably connected to the cylinder 11 via a rotating assembly with the cylinder 11. The rotating assembly is electrically connected with the electric control switch, and the rotating assembly can drive the cylinder body 11 to rotate through electric control switch-on, so that a worker can take out a final product conveniently.

Be equipped with the stirring rake subassembly in the operation chamber 12, the stirring rake subassembly meshes the material in operation chamber 12, and the stirring rake subassembly is connected with power component.

As an embodiment of the present invention, referring to fig. 2 to 7, the pressure regulating member 33 includes a piston 331, a driving rod 332, the piston 331 is adapted to the working chamber 12; a drive rod 332 is connected to the cartridge barrel 31, the drive rod 332 being used to drive the piston 331 to move. The cartridge 31 is connected to the vacuum generating member 13 through a pipe provided with a control valve for controlling whether the cartridge 31 is communicated with the vacuum generating member 13.

In this embodiment, the piston 331 is provided with a check valve for allowing only the gas in the cartridge 31 to flow to the outside.

The drive rod 332 is connected to the cartridge 31 by a link.

The driving rod 332 is an electric telescopic rod, the driving rod 332 drives the piston 331 to move along the axial direction of the material containing barrel 31, and the movement of the piston 331 enables gas in the material containing barrel 31 to escape through a one-way valve or a vacuum generating piece, so that the vacuum state in the material containing barrel 31 is ensured.

As an embodiment of the present invention, referring to fig. 2 to 7, the switch 32 includes: the movable plate 321 is movably connected with the charging barrel 31; one end of the adjusting rod 322 is movably connected with the movable plate 321, the other end of the adjusting rod 322 penetrates through the piston 331 to be a free end, and the adjusting rod 322 is rotatably connected with the piston 331; the rotating plate 323 is connected with the adjusting rod 322; the power member 324 is connected with the adjusting rod 322, and the power member 324 is used for driving the adjusting rod 322 to separate from the movable plate 321 or/and driving the adjusting rod 322 to rotate.

After the vacuum state is formed in the material containing barrel 31, the piston 331 is moved upward, and then the compacted material is dispersed by the rotating plate 332. The arrangement of the switch member 32 ensures that the material contained in the cartridge 31 does not change its physical state. The provision of the light-emitting member 32 also facilitates the communication of the cartridge 31 with the interior of the working chamber 12.

In this embodiment, the adjusting rod 322 includes a first sleeve 3221, a second sleeve 3222, a spring 3223, and a connecting member 3224, the first sleeve 3221 is provided with a first groove 5, and the first sleeve 3221 is rotatably connected to the power member 324; part of the second sleeve 3222 is slidably connected with the side wall of the first groove 5, and one end of the second sleeve 3222 can penetrate through the piston 331; the second sleeve 3222 is movably connected with the power piece 324; one end of the spring 3223 is connected with the inner wall of the first groove 5, and the other end of the spring 3223 is connected with the second sleeve 3222; the connecting member 3224 is connected to the second sleeve 3222, and the connecting member 3224 is detachably connected to the movable plate 321.

In the embodiment, the movable plate 321 is rotatably connected to the material containing barrel 31 through a rotating shaft, the movable plate 321 is connected to the material containing barrel 31 through a return spring, one end of the return spring is connected to the movable plate 321, and the other end of the return spring is connected to the material containing barrel 31.

The movable plate 321 is a semicircular plate, and the middle position of the arc end of the semicircular plate is rotatably connected to the material containing barrel 31 through a rotating shaft. When the two semicircular plates are spliced, the opening at one end of the material containing barrel 31 can be sealed and covered, and the vertical edge of each semicircular plate is provided with a permanent magnet.

The connecting member 3224 is an electromagnet, and a control switch of the electromagnet is disposed in the second sleeve 3222, when in normal use, the connecting member 3224 is energized, the magnetic poles between the connecting member 3224 and the movable plate 321 are opposite, and the connecting member 3224 attracts the movable plate 321. When the second sleeve 3222 moves, the downward movement of the second sleeve 3222 turns off the electromagnet, the connecting body 3224 is demagnetized, the movable plate 321 moves, and the material containing barrel 31 is communicated with the working chamber 12.

In this embodiment, a temperature control assembly capable of adjusting the temperature in the working chamber 12 is further included. The temperature control component ensures that the material can be in a constant temperature state in a kneading state.

The vacuum generating part 13, the switch part 32, the pressure regulating part 33, the closing switch, the motor, the temperature control component, the rotating component and the stirring paddle component are respectively and electrically connected with an electric control switch, and the electric control switch comprises a control center and a control panel electrically connected with the control center.

In this embodiment, the cover 2 is provided with a transparent viewing window. The arrangement of the transparent observation window facilitates the observation of the operation state by the operator.

In the present embodiment, the cylinder 11 is made of a heat conductive material.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.