1. An elastic air cushion antifriction elbow is characterized in that: comprises a bent pipe wall, an elastic net, a flange plate and a shunting plugboard; the wall of the elbow pipe and the flange are in a fixed connection structure; the elastic net is arranged in the inner side of the bent pipe wall in a cylindrical shape, a certain space is reserved between the elastic net and the inner side of the bent pipe wall, the elastic net is a gas chamber area, and two end faces of the elastic net are fixedly connected with the inner end face of the flange plate; the flow dividing inserting plate is arranged at an inlet on the inner side of the elbow wall.

2. The elastic air cushion antifriction elbow of claim 1, characterized in that: the number of the flow distribution inserting plates is 1, the flow distribution inserting plates are in a bending arc shape matched with the bending direction of the bent pipe and are arranged at the center of the inlet.

3. The elastic air cushion antifriction elbow of claim 1, characterized in that: the angle of the elastic net is consistent with that of the wall of the bent pipe.

4. The elastic air cushion antifriction elbow of claim 1, characterized in that: the elastic net is uniformly distributed with square through holes, and the size of the square through holes is smaller than that of solid particles circulating inside.

5. The elastic air cushion antifriction elbow of claim 4 wherein: and clamping grooves matched with the square through holes on the elastic net are formed at two ends of the shunting plugboard.

6. The elastic air cushion antifriction elbow of claim 1, characterized in that: and threaded holes are uniformly distributed in the flange plate.

Background

The pneumatic conveying is to convey materials by utilizing the energy of air, the energy of the air can be changed into two forms of pressure and speed, and generally, the energy of the speed form is utilized, namely, the kinetic energy of the air with certain speed is utilized to convey the materials. When the particles are conveyed in the horizontal pipeline and the vertical pipeline, the collision incidence angle of the particles and the wall of the elbow is small, and the particles generally do not cause serious abrasion. When particles enter the elbow, the particles are carried by the gas roll to collide with the elbow wall of the elbow at a very high speed under the action of centrifugal force and inertia force due to the change of the motion direction, and the particles collide for a plurality of times to generate impact on the elbow wall, so that the abrasion on the elbow wall is caused. Because the density of the particles is far greater than that of the gas, the centrifugal force of the particles in motion is much greater than that of the gas medium, which causes the particle groups to be separated from the gas at the elbow and collide with the elbow channel in the form of jet flow, causing severe abrasion of the local pipe, forming abrasion grooves, and finally causing the elbow wall to be worn through.

The existing method for preventing the abrasion of the elbow caused by the particles is characterized in that firstly, the abrasion resistance of the elbow is increased by changing materials, and the abrasion speed of the elbow is delayed; and secondly, thickening the easy-to-wear part in advance, such as welding a thick wear-resistant steel or increasing a wear-resistant layer on the easy-to-wear part. Thirdly, the flow section of the elbow is increased or a baffle plate is additionally arranged to change the particle flow in the pipe so as to protect the elbow. The first method can only prolong the service life of the elbow and does not solve the problem of elbow abrasion; the third method does not solve the severe working conditions of the elbow part, can not effectively solve the abrasion problem of the elbow, and still has serious abrasion problem in the using process; the third method, although reducing the abrasion, increases the power loss of the particles and is liable to generate the phenomenon of ash blocking.

Disclosure of Invention

In order to solve the problems, the invention provides an elastic air cushion antifriction elbow.

The technical scheme of the invention is as follows: an elastic air cushion antifriction elbow comprises an elbow wall, an elastic net, a flange plate and a shunting plugboard; the wall of the elbow pipe and the flange are in a fixed connection structure; the elastic net is arranged in the inner side of the bent pipe wall in a cylindrical shape, a certain space is reserved between the elastic net and the inner side of the bent pipe wall, the elastic net is a gas chamber area, and two end faces of the elastic net are fixedly connected with the inner end face of the flange plate; the flow dividing inserting plate is arranged at an inlet on the inner side of the elbow wall.

Preferably, the number of the flow dividing inserting plates is 1, the flow dividing inserting plates are in a bending arc shape matched with the bending direction of the bent pipe, and the flow dividing inserting plates are arranged at the center of the inlet.

Preferably, the angle of the elastic net is consistent with that of the elbow wall.

Preferably, square through holes are uniformly distributed on the upper surface of the elastic net, and the size of each square through hole is smaller than that of solid particles circulating inside.

Preferably, the two ends of the shunting plugboard are provided with clamping grooves matched with the square through holes on the elastic net.

Preferably, the flange plate is uniformly provided with threaded holes.

The beneficial technical effects of the invention are as follows: an elastic air cushion antifriction elbow comprises an elbow wall, an elastic net and a flow dividing inserting plate. The inlet is additionally provided with a flow-dividing inserting plate which divides the air flow wrapped with the materials to ensure that the air flow is layered and collided, and the abrasion to the wall of the bent pipe and the metal net is reduced. The elastic net is arranged on the inner side of the wall of the bent pipe, a gas chamber area is formed between the elastic net and the wall of the bent pipe, square through holes are uniformly distributed on the elastic net, and the size of each square through hole is smaller than that of each particle, so that gas and solid particles are separated; part of the gas enters the gas chamber area through the square through hole to form a gas cushion; the solid particles collide with the elastic net, the elastic net absorbs impact kinetic energy of the solid particles and converts the impact kinetic energy into elastic potential energy, then the potential energy is converted into kinetic energy to give the particles to rush out of the elbow in an accelerating manner, the moving direction of the solid particles is changed, and meanwhile, energy loss is little; because the inlet and outlet of the elbow have pressure difference, the air chamber area can form an air cushion which rushes to the axis of the elbow, thereby protecting the elastic net and the wall of the elbow; the invention has longer service life and better anti-abrasion effect, and is more beneficial to replacement and maintenance.

Drawings

FIG. 1 is a perspective view of an elastic air cushion antifriction elbow in accordance with the present invention.

Fig. 2 is an enlarged view at i in fig. 1.

Figure 3 is a front view of an elastic air cushion antifriction elbow of the present invention.

Fig. 4 is a sectional view a-a in fig. 3.

Figure 5 is a right side view of an elastic air cushion friction reducing elbow of the present invention.

Fig. 6 is a sectional view B-B in fig. 5.

Fig. 7 is a perspective view of a splitter plate.

Fig. 8 is a right side view of the splitter insert plate.

Fig. 9 is a schematic view of the working principle of the elastic air cushion antifriction elbow of the invention.

In the figure: 1. elbow wall, 2 elastic net, 21 square through hole, 3 shunt inserting plate, 31 clamping groove,

4. The gas-liquid separator comprises a flange, 5 screw holes, 6 an air chamber area 7, an air flow for wrapping solid particles, 8 gas entering the air chamber area, and 9 solid particles.

Detailed Description

Referring to fig. 1-9, an elastic air cushion antifriction elbow comprises an elbow wall, an elastic net, a flange plate and a flow dividing inserting plate. The wall of the elbow pipe and the flange are in a fixed connection structure; the elastic net is arranged in the inner side of the bent pipe wall in a cylindrical shape, a certain space is reserved between the elastic net and the inner side of the bent pipe wall, the elastic net is a gas chamber area, and two end faces of the elastic net are fixedly connected with the inner end face of the flange plate; the flow dividing inserting plate is arranged at the center of an inlet on the inner side of the elbow wall.

The number of the flow-dividing inserting plates is 1, the flow-dividing inserting plates are in a curved arc shape matched with the bending direction of the bent pipe, the flow-dividing inserting plates are arranged at the center of an inlet, and the air flow wrapped with the solid particles is divided at the flow-dividing inserting plates, so that the air flow is layered and collided, the abrasion to the wall of the bent pipe and the metal net is reduced, and the arc-shaped structure plays a role in guiding the air flow wrapped with the material.

The angle of the elastic net is consistent with that of the elbow, and the space of the air chamber area is uniform.

The elastic net is uniformly provided with square through holes, and the size of each square through hole is smaller than that of each particle, so that gas and solid particles can be accurately separated. Part of gas enters the gas chamber area to form an air cushion, solid particles which can rebound and impact the air cushion protect the elbow wall, the solid particles can impact the elastic net and are stored as elastic potential energy of the elastic net, the elastic net releases the obtained elastic potential energy and converts the elastic potential energy into kinetic energy for pushing the particles out of the elbow, so that the energy loss of the particles in the elbow is not too high, and meanwhile, the gas entering the gas chamber area can approach the axis of the outlet due to the pressure difference between the inlet and the outlet of the elbow to gradually form the air cushion which rushes to the axis and provides kinetic energy for accelerating the particles. After the flow is divided, solid particles on one side collide with the elastic net, the motion direction is changed by the elastic net, the solid particles impact the other side, the solid particles are collided with the particles on the other side, and the particles are rebounded to flow to the elbow outlet together, so that the advantages of an air cushion and an elastic net in two wear-resistant modes are achieved.

The two ends of the shunting plugboard are provided with clamping grooves matched with square through holes on the elastic net so as to fix the shunting plugboard, and the existence of the shunting plugboard plays a supporting role for the elastic net and is also convenient for replacing the shunting plugboard.

The flange plate is uniformly provided with threaded holes, and the flange plate is directly arranged at the turning position of a pipeline system by utilizing threaded connection, so that the replacement and the maintenance are facilitated.

The working method comprises the following steps: referring to fig. 9, the first stage: the airflow carrying the solid particles is divided by the flow dividing inserting plate from the inlet of the elbow.

And a second stage: the part of gas of the shunted airflow wrapped by the solid particles can enter the air chamber area through the square through holes at the elbow turning part to form a layer of air cushion, and the solid particles can not impact on the elastic net through the square through holes, so that the kinetic energy is absorbed and stored as the elastic potential energy of the elastic net.

And a third stage: the elastic net releases the elastic potential energy obtained in the second stage, and converts the elastic potential energy into kinetic energy for pushing the particles out of the elbow, the motion direction of the solid particles is changed by the elastic net, the solid particles impact the other side and are impacted by the rebounded solid particles on the other side, meanwhile, the gas entering the gas chamber area in the second stage can gradually form an air cushion rushing to the axis due to the pressure difference between the elbow inlet and the elbow outlet, the kinetic energy for accelerating the solid particles is provided, the gas flows to the elbow outlet together, and finally flows out of the elbow.