Combined sealing gate valve

Abstract

The utility model discloses a combined sealing gate valve which comprises a valve body and a gate, the outer end of a blanking channel of the valve body is sealed through an end plate, the end plate of the valve body is provided with a horizontal sliding groove, the driving end of the gate extends outwards from the sliding groove of the end plate, and the valve body is provided with a combined sealing structure used for sealing a gap between the gate and the sliding groove of the end plate. The combined sealing structure comprises a compressed air sealing structure and a contact type sealing structure; the compressed air sealing structure comprises an airflow channel which is formed in the end plate and communicates with the sliding groove, and an air inlet communicating with the airflow channel is formed in the outer side of the end plate. The contact type sealing structure is installed on the outer side of the end plate, and the gap between the flashboard extending section and the end plate sliding groove is sealed through the contact type sealing structure. Compared with the prior art, the sealing structure has the advantages that sealing performance is optimized, friction resistance of movement of the flashboard is reduced, and the service life of the sealing structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of material feeding control devices, in particular to a combined sealing gate valve. Background Art

[0002] In the building materials, mining, metallurgy and other industries, various valves are often used to control the feeding of various materials. Powdered materials are a common material in the feeding control process. Due to their small particles, they are very easy to flow from the gap between the gate and the valve body to the outside, causing environmental pollution, waste of resources and other problems. The existing sealing method often uses sealing materials to press the gate to reduce the gap between the gate and the valve body to achieve sealing, but this method often requires the sealing material to fit tightly with the gate to play a sealing role, which will greatly increase the friction resistance of the gate during operation, causing the gate valve to be unable to open and close normally, affecting the normal production process; in addition, because the sealing material and the gate are pressed too tightly, the sealing material will be quickly worn during the reciprocating movement of the gate, and leakage will occur again. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a combined sealing gate valve to optimize the sealing performance while reducing the friction resistance of the gate movement.

[0004] The utility model is realized by the following technical solutions:

[0005] A combined sealed gate valve comprises a valve body and a gate, a blanking channel is provided on the valve body, the outer end of the valve body blanking channel is closed by an end plate, a horizontal sliding groove is provided on the end plate of the valve body, a gate driving end extends outward from the sliding groove of the end plate, and the closing and opening of the valve body blanking channel is achieved by pulling the gate plate inward and outward, and a combined sealing structure for sealing the gap between the gate plate and the sliding groove of the end plate is provided on the valve body, and the combined sealing structure comprises a compressed air sealing structure and a contact sealing structure;

[0006] The compressed air sealing structure includes an air flow channel opened inside the end plate, the air flow channel is connected to the sliding groove of the end plate, an air inlet connected to the air flow channel is opened on the outer side of the end plate, and the air inlet is connected to a compressed air source through an air pipe;

[0007] The contact sealing structure is installed on the outer side of the end plate. The section of the gate extending out of the end plate sliding groove is the extending section. The contact sealing structure is used to seal the gap between the gate extending section and the end plate sliding groove.

[0008] As a preferred embodiment of the above-mentioned gate valve, the contact sealing structure includes a sealing seat, a sealing member and a sealing pressure plate. The sealing member and the sealing seat are sequentially mounted inside and outside on the periphery of the extended section of the gate, and the sealing seat is fixed on the outer side of the end plate. The sealing pressure plate is detachably connected to the outer side of the sealing seat. The sealing member is pressed by the protrusion on the inner side of the sealing pressure plate, and the gap enclosed by the extended section of the gate, the sealing seat and the outer side surface of the end plate is sealed by the sealing member.

[0009] As a preferred embodiment of the above-mentioned gate valve, in the compressed air sealing structure, two upper and lower air inlets are opened on the outer side of the end plate, the upper and lower air inlets are respectively connected to the air flow channel inside the end plate, and the upper and lower air inlets are respectively located on the upper and lower sides of the gate plate.

[0010] As a preferred solution of the above-mentioned gate valve, a quick connector is provided at the air inlet on the outer side of the end plate, and the air pipe is connected through the quick connector.

[0011] As a preferred embodiment of the above-mentioned gate valve, in the compressed air sealing structure, the air flow channel is located around the periphery of the sliding groove to form a closed rectangular channel.

[0012] As a preferred solution of the above-mentioned gate valve, the sealing pressure plate is detachably connected to the outer side of the sealing seat by means of an adjusting screw.

[0013] As a preferred solution of the above-mentioned gate valve, a pneumatic actuator is installed on the valve body, and the output end of the pneumatic actuator is connected to the gate drive end through a Y-type connector.

[0014] As a preferred solution of the above-mentioned gate valve, a position sensor is provided on the valve body, and a sensing block used in conjunction with the position sensor is provided on the extended section of the gate.

[0015] As a preferred solution of the above-mentioned gate valve, the valve body is provided with a plurality of rollers for guiding and supporting the pulling and moving of the gate.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model provides a combined sealed gate valve, which has a combined sealing structure composed of a compressed air sealing structure and a contact sealing structure. The compressed air sealing structure forms a positive pressure environment in the gap between the gate and the sliding groove of the valve body, effectively preventing the material in the blanking channel of the valve body from flowing to the outside of the end plate; and due to the existence of the compressed air sealing structure, the contact sealing structure does not need to fit too tightly with the gate, which effectively reduces the friction resistance of the gate movement, and at the same time avoids the rapid wear and failure of the seal in the contact sealing structure, thereby improving the service life of the sealing structure; it truly achieves the reduction of the gate movement resistance while ensuring a good sealing effect and improving the service life of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the utility model.

[0019] Figure 2 It is a plan sectional view of the utility model.

[0020] Figure 3 yes Figure 2 A partial enlarged view of .

[0021] Figure 4 It is a three-dimensional exploded view of the contact sealing structure of the utility model.

[0022] Figure 5 It is a three-dimensional exploded view of the contact sealing structure of the utility model from another perspective.

[0023] Figure 6 It is a three-dimensional cross-sectional view of the valve body of the utility model cut away from the air flow channel.

[0024] Numbers in the figure: 1 valve body; 2 gate; 3 sliding groove; 4 Y-type joint; 5 cylinder; 6 blanking channel; 7 position sensor; 8 induction block; 9 roller; 10 compressed air sealing structure; 11 contact sealing structure; 12 air flow channel; 13 air pipe; 14 quick connector; 15 extension section; 16 sealing seat; 17 sealing element; 18 sealing pressure plate; 19 adjusting screw; 20 protrusion; 21 air inlet. DETAILED DESCRIPTION

[0025] The following is a detailed description of an embodiment of the utility model. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0026] See also Figures 1 to 6This embodiment discloses a combined sealed gate valve, including a valve body 1 and a gate 2. The valve body 1 is provided with a blanking channel 6. The outer end of the blanking channel 6 of the valve body 1 is closed by an end plate. The end plate of the valve body 1 is provided with a horizontal sliding groove 3. The driving end of the gate 2 extends outward from the sliding groove 3 of the end plate. The closing and opening of the blanking channel 6 of the valve body 1 are achieved by pulling the gate 2 inward and outward. A pneumatic actuator is installed on the valve body 1. The output end of the pneumatic actuator is connected to the driving end of the gate 2 through a Y-type joint 4. The pneumatic actuator can be a cylinder 5. The cylinder body of the cylinder 5 is installed on the valve body 1. The piston rod of the cylinder 5 is connected to the driving end of the gate 2 through a Y-type joint 4. The piston rod of the cylinder 5 is extended and retracted, thereby driving the gate 2 to be pulled inward and outward, thereby achieving the opening or closing of the blanking channel 6 of the valve body 1. The valve body 1 is provided with a position sensor 7, and the extension section 15 of the gate plate 2 is provided with a sensing block 8 used in conjunction with the position sensor 7. When the gate plate 2 moves to the fully open or fully closed position of the blanking channel 6 of the valve body 1, the position sensor 7 can feed back the gate plate 2 valve opening and closing signal to the control system. The valve body 1 is provided with a plurality of rollers 9 for guiding and supporting the gate plate 2 to be pulled out and moved.

[0027] The valve body 1 is provided with a combined sealing structure for sealing the gap between the gate plate 2 and the end plate sliding groove 3 , and the combined sealing structure includes a compressed air sealing structure 10 and a contact sealing structure 11 .

[0028] The compressed air sealing structure 10 includes an air flow channel 12 opened inside the end plate, the air flow channel 12 is connected to the sliding groove 3 of the end plate, and the air flow channel 12 is located around the outer periphery of the sliding groove 3 to form a closed rectangular channel. An air inlet 21 connected to the air flow channel 12 is opened on the outside of the end plate, and the air inlet 21 is connected to an external compressed air source through an air pipe 13. Among them, the outer side of the end plate is opened with an upper and lower air inlet 21, and the upper and lower air inlet 21 are respectively connected to the air flow channel 12 inside the end plate, and the upper and lower air inlet 21 are respectively located on the upper and lower sides of the gate plate 2. A quick connector 14 is provided at each air inlet 21 on the outer side of the end plate, and the air pipe 13 is connected through the quick connector 14. The compressed air enters the air flow channel 12 and the gap between the end plate sliding groove 3 and the gate plate 2 through the quick connector 14, and forms a positive pressure environment in the gap between the end plate sliding groove 3 and the gate plate 2, preventing the material in the blanking channel 6 of the valve body 1 from flowing to the outside from the gap between the sliding groove 3 and the gate plate 2, thereby playing a good sealing role.

[0029] The contact seal structure 11 is installed on the outer side of the end plate. The section of the gate plate 2 extending out of the end plate sliding groove 3 is the extension section 15. The contact seal structure 11 is used to seal the gap between the extension section 15 of the gate plate 2 and the end plate sliding groove 3. The contact seal structure 11 includes a seal seat 16, a seal 17 and a seal pressing plate 18. The seal 17 and the seal seat 16 are sequentially mounted on the outer periphery of the extension section 15 of the gate plate 2 in an inner and outer manner, and the seal seat 16 is fixed on the outer side of the end plate by screws. The seal pressing plate 18 is detachably connected to the outer side of the seal seat 16. The seal pressing plate 18 is detachably connected to the outer side of the seal seat 16 by an adjusting screw 19. The adjusting screw 19 passes through the through hole of the seal pressing plate 18 and is screwed into the threaded hole of the seal seat 16. The seal 17 is pressed by the protrusion 20 on the inner side of the seal pressing plate 18, and the seal 17 is used to seal the gap surrounded by the extension section 15 of the gate plate 2, the seal seat 16 and the outer side of the end plate. The seal 17 can be made of packing. By adjusting the tightening degree of the adjusting screw 19 on the sealing seat 16, the pressing degree of the protrusion 20 of the sealing pressure plate 18 on the sealing member 17 can be changed, thereby changing the pressing degree of the sealing member 17 on the gate plate 2. Due to the existence of the front-stage compressed air sealing structure 10, in the contact sealing structure 11, it is not necessary to press the sealing member 17 and the gate plate 2 too tightly, which effectively reduces the friction resistance of the gate plate 2, ensures the smooth movement of the gate plate 2, avoids the rapid wear and failure of the sealing member 17, and improves the service life of the sealing structure.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined sealed gate valve, comprising a valve body and a gate, a blanking channel is provided on the valve body, the outer end of the valve body blanking channel is closed by an end plate, a horizontal sliding groove is provided on the end plate of the valve body, the gate drive end extends outward from the sliding groove of the end plate, and the valve body blanking channel is closed and opened by pulling the gate plate inside and outside, characterized in that: The valve body is provided with a combined sealing structure for sealing the gap between the gate plate and the end plate sliding groove, and the combined sealing structure includes a compressed air sealing structure and a contact sealing structure; The compressed air sealing structure includes an air flow channel opened inside the end plate, the air flow channel is connected to the sliding groove of the end plate, an air inlet connected to the air flow channel is opened on the outer side of the end plate, and the air inlet is connected to a compressed air source through an air pipe; The contact sealing structure is installed on the outer side of the end plate. The section of the gate extending out of the end plate sliding groove is the extending section. The contact sealing structure is used to seal the gap between the gate extending section and the end plate sliding groove.

2. A combined sealing gate valve according to claim 1, characterized in that: The contact sealing structure includes a sealing seat, a sealing member and a sealing pressure plate. The sealing member and the sealing seat are sequentially mounted on the outer periphery of the extended section of the gate plate in an inside-outside manner, and the sealing seat is fixed on the outer side of the end plate. The sealing pressure plate is detachably connected to the outer side of the sealing seat. The sealing member is pressed by the protrusion on the inner side of the sealing pressure plate, and the gap surrounded by the extended section of the gate plate, the sealing seat and the outer side surface of the end plate is sealed by the sealing member.

3. A combined sealing gate valve according to claim 1, characterized in that: In the compressed air sealing structure, an upper and lower air inlet are opened on the outer side of the end plate, the upper and lower air inlet are respectively connected to the air flow channel inside the end plate, and the upper and lower air inlet are respectively located on the upper and lower sides of the gate plate.

4. A combined sealing gate valve according to claim 1, characterized in that: A quick connector is provided at the air inlet on the outer side of the end plate, and the air pipe is connected via the quick connector.

5. A combined sealing gate valve according to claim 1, characterized in that: In the compressed air sealing structure, the air flow channel is located around the periphery of the sliding groove to form a closed rectangular channel.

6. A combined sealing gate valve according to claim 2, characterized in that: The sealing pressure plate is detachably connected to the outer side of the sealing seat via an adjusting screw.

7. A combined sealed gate valve according to claim 1, characterized in that: A pneumatic actuator is installed on the valve body, and the output end of the pneumatic actuator is connected to the gate drive end through a Y-type joint.

8. A combined sealing gate valve according to claim 1, characterized in that: The valve body is provided with a position sensor, and the extended section of the gate plate is provided with an induction block used in conjunction with the position sensor.

9. A combined sealing gate valve according to claim 1, characterized in that: The valve body is provided with a plurality of rollers for guiding and supporting the pulling and moving of the gate plate.

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