1. The utility model provides a take double key butterfly valve, is including valve body, valve rod, disk seat and butterfly plate, the butterfly plate is installed on the valve rod, the sealed cooperation of disk seat and butterfly plate, its characterized in that: the valve rod is divided into an upper valve rod and a lower valve rod which are coaxially arranged, the upper valve rod can be rotatably arranged on the upper portion of the valve body in a penetrating mode, the lower valve rod can be rotatably arranged in the valve body, the upper end of the upper valve rod is connected with a driving device, the lower end of the upper valve rod is connected with a conversion rod, the upper portion of the lower valve rod is provided with a lower pull rod capable of lifting, the conversion rod is sleeved on the lower pull rod, and the conversion rod is in threaded transmission connection with the lower pull rod; the butterfly plate is provided with a flow guide hole for conducting the liquid inlet side and the liquid outlet side, one side of the flow guide hole is provided with a guide valve flap which is in sealing fit with the flow guide hole, the guide valve flap is rotatably arranged on a rotating shaft, the rotating shaft is arranged on a fixed frame, the fixed frame is arranged on the butterfly plate, and gear rack transmission is formed between the guide valve flap and a lower pull rod; the outer circle of the upper valve rod is provided with a first key groove and a second key groove which are centrosymmetric, a first flat key and a second flat key are arranged on the inner circle of the butterfly plate in a telescopic penetrating mode, the first flat key is provided with a first compression spring in a matched mode, the second flat key is provided with a second compression spring in a matched mode, the first flat key and the second flat key are arranged in a 90-degree included angle mode, the left straight groove wall of the first key groove can drive the first flat key to rotate in the clockwise direction, the right inclined groove wall of the first key groove can drive the first flat key to be separated from the first key groove in the anticlockwise direction, the right straight groove wall of the second key groove can drive the second flat key to rotate in the anticlockwise direction, and the left inclined groove wall of the second key groove can drive the second flat key to be separated from the second key groove in the clockwise direction.

2. The butterfly valve with double key of claim 1, wherein: go up the valve stem and be equipped with adjustment tank and adjustment sheet in, the adjustment sheet is including the flexure strip that the symmetry set up, and the flexure strip has first face of leading and the second face of leading respectively, and first face of leading constitutes the right side chute wall of first keyway, and the second leads the left side chute wall that the face constitutes the second keyway, and first face of leading leads the adjustable adjustment tank of arranging in of inclination of face and second.

3. The butterfly valve with double key of claim 2, wherein: go up the rotatable regulation pole of wearing to be equipped with on the valve rod, adjust the pole upper end and be connected with the regulating wheel, but the adjusting groove is equipped with the adjusting collar of upper and lower action, and the adjusting collar lower extreme is equipped with the push pedal that the symmetry set up, and the adjusting collar cup joints in adjusting the pole lower extreme, and adjusts the pole lower extreme and adjust set screw drive and link to each other, and first leading face and second lead the face and carry out inclination by the push pedal drive of adjusting collar and adjust, and the back of corresponding flexure strip is equipped with down the inclined plane, is equipped with the inclined plane in the push pedal, lower inclined plane and last inclined plane transmission fit.

4. The butterfly valve with double key of claim 1, wherein: an axial compression spring is arranged between the adjusting sleeve and the adjusting rod.

5. The butterfly valve with double key of claim 1, wherein: and a pre-pressing spring is arranged between the fixing frame and the guide valve clack, and the guide valve clack is tightly attached to the butterfly plate under the action of the pre-pressing spring.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and a part for controlling a pipeline medium is a valve which is opened and closed by rotating around a valve shaft (valve rod) by taking a closing member (a valve clack or a butterfly plate) as a disc, and has the defects that: when the butterfly valve is opened, the torque is large when the butterfly valve is opened due to the fact that the front portion and the rear portion of the butterfly valve have very large pressure difference, and the difficulty in opening is increased.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a butterfly valve with double keys, which is reasonable in structure and easy to open.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this take double key butterfly valve, including valve body, valve rod, disk seat and butterfly plate, the butterfly plate is installed on the valve rod, disk seat and the sealed cooperation of butterfly plate, its characterized in that: the valve rod is divided into an upper valve rod and a lower valve rod which are coaxially arranged, the upper valve rod can be rotatably arranged on the upper portion of the valve body in a penetrating mode, the lower valve rod can be rotatably arranged in the valve body, the upper end of the upper valve rod is connected with a driving device, the lower end of the upper valve rod is connected with a conversion rod, the upper portion of the lower valve rod is provided with a lower pull rod capable of lifting, the conversion rod is sleeved on the lower pull rod, and the conversion rod is in threaded transmission connection with the lower pull rod; the butterfly plate is provided with a flow guide hole for conducting the liquid inlet side and the liquid outlet side, one side of the flow guide hole is provided with a guide valve flap which is in sealing fit with the flow guide hole, the guide valve flap is rotatably arranged on a rotating shaft, the rotating shaft is arranged on a fixed frame, the fixed frame is arranged on the butterfly plate, and gear rack transmission is formed between the guide valve flap and a lower pull rod; the outer circle of the upper valve rod is provided with a first key groove and a second key groove which are centrosymmetric, a first flat key and a second flat key are arranged on the inner circle of the butterfly plate in a telescopic penetrating mode, the first flat key is provided with a first compression spring in a matched mode, the second flat key is provided with a second compression spring in a matched mode, the first flat key and the second flat key are arranged in a 90-degree included angle mode, the left straight groove wall of the first key groove can drive the first flat key to rotate in the clockwise direction, the right inclined groove wall of the first key groove can drive the first flat key to be separated from the first key groove in the anticlockwise direction, the right straight groove wall of the second key groove can drive the second flat key to rotate in the anticlockwise direction, and the left inclined groove wall of the second key groove can drive the second flat key to be separated from the second key groove in the clockwise direction.

Go up the valve stem and be equipped with adjustment tank and adjustment sheet in, the adjustment sheet is including the flexure strip that the symmetry set up, and the flexure strip has first face of leading and the second face of leading respectively, and first face of leading constitutes the right side chute wall of first keyway, and the second leads the left side chute wall that the face constitutes the second keyway, and first face of leading leads the adjustable adjustment tank of arranging in of inclination of face and second.

Go up the rotatable regulation pole of wearing to be equipped with on the valve rod, adjust the pole upper end and be connected with the regulating wheel, but the adjusting groove is equipped with the adjusting collar of upper and lower action, and the adjusting collar lower extreme is equipped with the push pedal that the symmetry set up, and the adjusting collar cup joints in adjusting the pole lower extreme, and adjusts the pole lower extreme and adjust set screw drive and link to each other, and first leading face and second lead the face and carry out inclination by the push pedal drive of adjusting collar and adjust, and the back of corresponding flexure strip is equipped with down the inclined plane, is equipped with the inclined plane in the push pedal, lower inclined plane and last inclined plane transmission fit.

An axial compression spring is arranged between the adjusting sleeve and the adjusting rod.

And a pre-pressing spring is arranged between the fixing frame and the guide valve clack, and the guide valve clack is tightly attached to the butterfly plate under the action of the pre-pressing spring.

The improved butterfly valve with the double keys has the advantages that the guide valve clack and the guide hole are arranged in the valve in a built-in mode, the guide valve clack is opened easily and conveniently before the butterfly valve is opened, so that after a medium in front of the valve enters the valve through the guide hole, the pressure difference between the front of the valve and the back of the valve is reduced, the butterfly valve is opened easily, the manufacturing cost is low, the number of external interfaces is small, and the butterfly valve is not easy to leak.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view D-D of fig. 1 of the present invention.

Fig. 3 is a cross-sectional view E-E of fig. 1 according to the present invention.

Fig. 4 is a structural view of an adjusting sleeve of the invention.

Fig. 5 is a view from direction a of fig. 4 in accordance with the present invention.

Fig. 6 is a view showing the structure of the regulating blade of the present invention.

FIG. 7 is a view of the invention taken along the line B of FIG. 6.

Fig. 8 is a cross-sectional view H-H of fig. 6 of the present invention.

Fig. 9 is a lower structural view of fig. 1 of the present invention.

Detailed Description

The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In the embodiment, the butterfly valve with the double keys comprises a valve body 1, a valve rod, a valve seat 17 and a butterfly plate 21, wherein the butterfly plate 21 is installed on the valve rod, the valve seat 17 is in sealing fit with the butterfly plate 21, a sealing ring 18 is arranged on the excircle of the butterfly plate 21, the valve rod is divided into an upper valve rod 10 and a lower valve rod 2 which are coaxially arranged, the upper valve rod 10 is rotatably arranged on the upper portion of the valve body 1 in a penetrating manner, a packing 11 is arranged between the upper valve rod 10 and the upper portion of the valve body 1, the packing 11 is pressed by a gland 12, the upper end of the upper valve rod 10 is connected with a driving device 15, the driving device 15 is a worm gear device, a pneumatic device, a hydraulic device or an electric device and the like, the driving device is installed on the valve body 1 through a support 13, an axial limiting sleeve 14 of the upper valve rod 10 is further arranged on the support 13, the lower end of the upper valve rod 10 is connected with a conversion rod 4, the lower valve rod 2 is rotatably arranged in the valve body 1, the butterfly plate 21 is fixed on the lower valve rod 2 through a positioning pin 28, the lower end of a lower valve rod 2 is rotatably arranged on the lower cavity wall of a valve body 1, an opening for mounting the lower valve rod 2 is formed in the corresponding lower cavity wall of the valve body 1, a lower end cover 22 is covered outside the opening, a lower pull rod 3 capable of lifting is arranged at the upper part of the lower valve rod 2 in a penetrating mode, a conversion rod 4 is sleeved on the lower pull rod 3, the conversion rod 4 is in threaded transmission connection with the lower pull rod 3, and the conversion rod 4 drives the lower pull rod 3 to lift; the butterfly plate 21 is provided with a flow guide hole 24 for conducting a liquid inlet side and a liquid outlet side, one side of the flow guide hole 24 is provided with a guide valve flap 23 in sealing fit, the guide valve flap 23 is rotatably arranged on a rotating shaft 27, the rotating shaft 27 is arranged on a fixed frame 26, the fixed frame 26 is arranged on the butterfly plate 21, gear and rack transmission is formed between the guide valve flap 23 and the lower pull rod 3, and the lower pull rod 3 drives the guide valve flap 23 to open or close; a first key groove 29 and a second key groove 30 which are centrosymmetric are arranged on the excircle of the upper valve rod 10, a first flat key 20 and a second flat key 31 are telescopically arranged on the inner circle of the butterfly plate 21, grooves for mounting the first flat key 20 and the second flat key 31 are respectively arranged on the corresponding inner circle of the butterfly plate 21, the first flat key 20 is provided with a first compression spring 19, the second flat key 31 is provided with a second compression spring 32, the first flat key 20 and the second flat key 31 are arranged at an included angle of 90 degrees, the left straight groove wall of the first key groove 29 can drive the first flat key 20 to rotate along the clockwise direction, the right inclined groove wall of the first key groove 29 can drive the first flat key 20 to separate from the first key groove 29 along the anticlockwise direction, the right straight wall of the second key groove 30 can drive the second flat key 31 to rotate along the counterclockwise direction, and the left inclined wall of the second key groove 30 can drive the second flat key 31 to disengage from the second key groove 30 along the clockwise direction.

As a further improved specific embodiment, an adjusting groove 9 and an adjusting blade 6 are arranged in the upper valve rod 10, the adjusting blade 6 includes an elastic blade 35 symmetrically arranged, the elastic blade 35 has a first guide surface 37 and a second guide surface 38, the first guide surface 37 constitutes a right side chute wall of the first key groove 29, the second guide surface 38 constitutes a left side chute wall of the second key groove 30, and the inclination angles of the first guide surface 37 and the second guide surface 38 are adjustable and arranged in the adjusting groove 9, preferably, the specific structure of the adjustment is that the upper valve rod 10 is rotatably penetrated with an adjusting rod 5, the upper end of the adjusting rod 5 is connected with an adjusting wheel 16, an adjusting sleeve 8 capable of moving up and down is arranged in the adjusting groove 9, the lower end of the adjusting sleeve 8 is provided with a push plate 33 symmetrically arranged, the adjusting sleeve 8 is sleeved at the lower end of the adjusting rod 5, the lower end of the adjusting rod 5 is in threaded transmission connection with the adjusting sleeve 8, the first guide surface 37 and the second guide surface 38 are driven by the push plate 33 of the adjusting sleeve 8 to adjust the inclination angle, the back of the corresponding elastic piece 35 is provided with a lower inclined surface 36, the push plate 33 is provided with an upper inclined surface 34, and the lower inclined surface 36 is in transmission fit with the upper inclined surface 34.

As a further improved embodiment, an axial compression spring 7 is arranged between the adjusting sleeve 8 and the adjusting rod 5, and the lifting action of the adjusting sleeve 8 is tensioned.

As a further improved specific embodiment, a pre-pressing spring 25 is arranged between the fixing frame 26 and the pilot valve flap 23, and the pilot valve flap 23 is tightly attached to the butterfly plate 21 under the action of the pre-pressing spring 25, so that the sealing performance is improved.

The use method of the invention comprises the following steps:

the starting process comprises the following steps: the upper valve rod 10 is driven by the driving device 15 to rotate anticlockwise, the first flat key 20 pushes the first flat key 20 to overcome the contraction of the first compression spring 19 under the action of the first guide surface 37 of the adjusting sheet 6, the upper valve rod 10 is continuously rotated, the first flat key 20 is completely separated from the first key groove 29, the upper valve rod 10 is continuously rotated anticlockwise, the second key groove 30 is rotated to a position corresponding to the second flat key 31, the second flat key 31 enters the second key groove 30 under the push of the second compression spring 32, the upper valve rod 10 rotates anticlockwise and drives the conversion rod 4 to rotate, the conversion rod 4 and the lower pull rod 3 form threaded connection, so that the lower pull rod 3 is driven to move downwards, as the gear and rack transmission is formed between the lower pull rod 3 and the pilot valve flap 23, the pilot valve flap 23 is driven to rotate around the rotating shaft 27, the pilot valve flap 23 is slowly opened, the front valve (liquid inlet side) is communicated with the rear valve (liquid outlet side) through the guide hole 24, after partial medium in front of the valve enters the valve through the diversion hole 24, the pressure difference between the front of the valve and the back of the valve is reduced, at the moment, the valve rod is continuously rotated anticlockwise, and the butterfly plate 21 is driven to rotate anticlockwise and the butterfly valve is easily opened under the action of the second flat key 31.

And (3) closing process: the upper valve rod 10 is driven by the driving device 15 to rotate clockwise, the second flat key 31 pushes the second flat key 31 to overcome the second compression spring 32 to contract under the action of the second guide surface 38 of the adjusting sheet 6, the upper valve rod 10 continues to rotate, the second flat key 31 is completely separated from the second key groove 30, the upper valve rod 10 continues to rotate clockwise, the first key groove 29 is rotated to a position corresponding to the first flat key 20, the first flat key 20 enters the first key groove 29 under the pushing of the first compression spring 19, the conversion rod 4 is driven to rotate while the upper valve rod 10 rotates clockwise, the lower pull rod 3 is driven to move upwards due to the threaded connection between the conversion rod 4 and the lower pull rod 3, the gear and rack transmission is formed between the lower pull rod 3 and the pilot valve flap 23, the pilot valve flap 23 is driven to rotate around the rotating shaft 27 at the moment, the pilot valve flap 23 is slowly closed, at the moment, the valve rod continues to rotate clockwise, under the action of the first flat key 20, the butterfly plate 21 is driven to rotate clockwise and the butterfly valve is easily closed.

In the use process, when the pressure difference between the front of the valve and the back of the valve is small before the valve is opened, if the upper valve rod 10 is rotated anticlockwise, the first flat key 20 can drive the butterfly plate 21 to open without being separated from the first key groove 29, and the guide valve disc 23 cannot be driven to rotate and the guide hole 24 is opened.

Rotatory regulating wheel 16, it is rotatory to drive the regulation pole 5, because adjust between pole 5 and the adjusting collar 8 through threaded connection, therefore, can drive adjusting collar 8 upwards or move down, when adjusting collar 8 moves down, push pedal 33 moves down, under the effect on last inclined plane 34 and lower inclined plane 36, promote the flexure strip 35 and rotate, the contained angle of first guide surface 37 and first keyway 29 side reduces, the contained angle of second guide surface 38 and second keyway 30 side reduces, when rotatory valve rod 10, need provide the bigger power of last valve rod 10 and just can make first flat key 20 move along first guide surface 37, thereby break away from first keyway 29. When the second flat key 31 is located in the second key groove 30, a larger force is required to provide the upper valve rod 10 to move the second flat key 31 along the second guide surface 38, so as to disengage from the second key groove 30; conversely, when the adjusting sleeve 8 moves upwards, the push plate 33 moves upwards, the included angle between the first guide surface 37 and the side surface of the first key groove 29 is increased, and the included angle between the second guide surface 38 and the side surface of the second key groove 30 is increased. When upper stem 10 is rotated, the provision of a small force on upper stem 10 causes first flat key 20 to move along first guide surface 37 and thereby disengage first keyway 29. When the second flat key 31 is located in the second key groove 30, the provision of a small force to the upper stem 10 causes the second flat key 31 to move along the second guide surface 38 and thus disengage from the second key groove 30.

The adjusting device (the adjusting wheel 16, the adjusting rod 5, the adjusting sleeve 8 and the adjusting sheet 6) has the function that when the driving device 15 can open the butterfly plate 21 or close the butterfly plate 21 without opening the guide valve flap 23 and the guide hole 24, the difficulty that the first flat key 20 is separated from the first key groove 29 along the first guide surface 37 and the difficulty that the second flat key 31 is separated from the second key groove 30 along the second guide surface 38 are increased by the adjustment of the adjusting device, so that the guide valve flap 23 does not need to be opened when the driving device 15 drives the butterfly plate 21 to be opened or closed. When the driving device 15 opens the butterfly plate 21 or closes the butterfly plate 21 only when the guide flap 23 and the guide hole 24 need to be opened, the difficulty that the first flat key 20 is separated from the first key groove 29 along the first guide surface 37 and the difficulty that the second flat key 31 is separated from the second key groove 30 along the second guide surface 38 are reduced by the adjustment of the adjusting device, and when the driving device 15 drives the butterfly plate 21 to be opened or closed, the guide flap 23 needs to be opened first.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.