Pneumatic tank bottom valve

Abstract

The utility model discloses a pneumatic tank bottom valve, which comprises a valve body and a pneumatic actuating mechanism, the valve body is provided with an inlet end and an outlet end, the inlet end is provided with a filter assembly in a clamping manner, the filter assembly comprises a base, a filter screen and a clamping sleeve, the base is connected with the clamping sleeve through threads, and the filter screen is connected with the clamping sleeve through threads. The filter screen is clamped between the base and the clamping sleeve, a plurality of buckles are arranged on the clamping sleeve, and the clamping sleeve is arranged at the inlet end in a clamped mode through the buckles. The utility model aims to provide the filter screen structure which solves the problems that impurities enter the rod cavity of the valve body, and abrasion and damage are caused to the sealing face of the valve element and sealing parts.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pneumatic tank bottom valve. Background Art

[0002] The pneumatic tank bottom valve controls the pressure, flow rate and flow direction of the airflow through the pneumatic actuator to realize the opening and closing operation of the valve. There are two types: normally closed and normally open. Due to the presence of impurities in the medium, when the valve is opened, impurities will enter the stem cavity of the valve body, causing irreversible damage to the valve core sealing surface and sealing components. Therefore, a filter device will be installed to filter the medium. The installation method is mostly that the filter device is set on the inlet flow channel and the outlet flow channel, and is clamped and fixed by tightening the flange and the valve body with bolts. This installation structure makes the subsequent disassembly and maintenance very inconvenient. Utility Model Content

[0003] The utility model aims at the above-mentioned problem and solves the problem that impurities enter the stem cavity of the valve body and cause wear and damage to the valve core sealing surface and sealing components.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic tank bottom valve, comprising a valve body and a pneumatic actuator, the valve body being provided with an inlet end and an outlet end, the inlet end being clamped with a filter assembly, the filter assembly comprising a base, a filter screen and a ferrule, the base and the ferrule being connected by threads, the filter screen being clamped between the base and the ferrule, a plurality of buckles being provided on the ferrule, and the ferrule being clamped on the inlet end by the buckles.

[0005] By adopting the above technical scheme, a snap-on installation method is adopted to facilitate later replacement and maintenance. At the same time, it is different from the filtering device in the prior art in which the base and the filter are an integrated structure. The base is connected to the ferrule by threaded connection to tighten the filter. In the later stage, only the filter needs to be maintained and replaced, which saves the company's maintenance costs. The ferrule is supported and fixed at the inlet end by a snap-on clamping method. During later maintenance, there is no need to disassemble the external flange and valve body, which saves cleaning time and improves work efficiency.

[0006] The utility model is further configured that a threaded inner wall is provided on the base, a stud matched with the threaded inner wall is provided on the side of the ferrule facing the base, and the stud is screwed onto the threaded inner wall.

[0007] By adopting the above technical solution and using a split threaded connection method, the installation and replacement of the filter screen is facilitated without replacing the entire filter assembly, thus saving the company's maintenance costs.

[0008] The utility model is further configured that a mounting plane is provided on one side of the stud facing the base, the filter screen is placed on the mounting plane, and a positioning flange for pressing the filter screen is provided on the base.

[0009] By adopting the above technical solution, the installation plane is used to ensure the flatness of the filter when it is placed, and the positioning flange is used to provide a pressing force on the filter to prevent the filter from falling off.

[0010] The utility model is further configured such that a first gasket is sandwiched between the positioning flange and the filter screen, and a second gasket is sandwiched between the mounting plane and the filter screen.

[0011] By adopting the above technical solution, a flexible connection between the filter screen and the mounting plane and the positioning flange is achieved, the clamping force on both sides is increased, and the pressure on the edge of the filter screen is reduced, thereby avoiding breakage and deformation at the edge of the filter screen after the base and the ferrule are tightened.

[0012] The utility model is further configured as follows: a plurality of yielding through holes are provided on the ferrule, and an extending leg, a U-shaped abutting portion and a retreating leg are provided on the buckle. The U-shaped abutting portion extends toward and abuts against one side of the inlet end, one end of the extending leg is connected to the U-shaped abutting portion and is bent and connected to one end of the yielding through hole, one end of the retreating leg is connected to the U-shaped abutting portion, and the other end passes through the yielding through hole and extends to one side of the inner wall of the ferrule, and a slot engaged with the U-shaped abutting portion is provided on the inner wall of the inlet end.

[0013] By adopting the above technical solution, the U-shaped abutment portion is connected with the slot to provide a stable support effect, and the extended support leg is used to release the abutment force received by the U-shaped abutment portion, thereby making a flexible bending to form a giving way effect. When disassembly is required, the retreat support leg is pressed downward, and the retreat support leg drives the U-shaped abutment portion to loosen the clamping force of the slot.

[0014] The utility model is further configured as follows: a transition surface is arranged on one side of the slot near the inlet end opening, and the transition surface is arranged in an arc shape.

[0015] By adopting the above technical solution, the U-shaped abutting portion can be easily engaged with the slot, thereby reducing the wear of the abutting surface of the U-shaped abutting portion.

[0016] The utility model is further configured as follows: the first gasket and the second gasket are made of rubber material.

[0017] By adopting the above technical solution, the rubber material can be used to achieve flexible contact with the filter screen, thereby preventing the filter screen from being deformed and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is an exploded view of the structure of the filter assembly of the utility model;

[0020] Figure 3 It is an enlarged view of part A of the present utility model.

[0021] In the figure: 1. valve body; 2. pneumatic actuator; 3. inlet end; 4. outlet end; 5. filter assembly; 8. base; 9. filter screen; 10. ferrule; 11. buckle; 12. threaded inner wall; 13. stud; 14. mounting plane; 15. positioning flange; 16. first gasket; 17. second gasket; 18. clearance hole; 19. extension leg; 20. U-shaped abutment; 21. retreat leg; 23. slot; 24. transition surface. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example: As shown in the attached Figures 1 to 3 A pneumatic tank bottom valve shown in the figure comprises a valve body 1 and a pneumatic actuator 2, the valve body 1 is provided with an inlet end 3 and an outlet end 4, the inlet end 3 is provided with a filter assembly 5, the filter assembly 5 comprises a base 8, a filter screen 9 and a ferrule 10, the base 8 and the ferrule 10 are provided by threaded connection, the filter screen 9 is clamped between the base 8 and the ferrule 10, a plurality of buckles 11 (four to six buckles 11 are provided) are provided on the ferrule 10, the ferrule 10 is clamped on the inlet end 3 by the buckles 11, and the clamping installation mode is adopted to facilitate the later replacement and maintenance, and at the same time, it is different from the filtering device in the prior art in which the base 8 and the filter screen 9 are an integrated structure, the filter screen 9 is tightened by the base 8 and the ferrule 10 by threaded connection, and only the filter screen 9 needs to be maintained and replaced in the later stage, which saves the maintenance cost of the enterprise, and the ferrule 10 is supported and fixed by the buckle 11 clamping mode at the inlet end 3, and there is no need to disassemble the external flange and the valve body 1 during the later maintenance, which saves the cleaning time and improves the working efficiency.

[0024] As attached Figure 2As shown, the base 8 is provided with a threaded inner wall 12, and the ferrule 10 is provided with a stud 13 (an integrated structure) adapted to the threaded inner wall 12 on the side facing the base 8. The stud 13 is screwed onto the threaded inner wall 12, and a split threaded connection is adopted, which facilitates the installation and replacement of the filter screen 9 without replacing the entire filter assembly 5, thereby saving the company's maintenance costs.

[0025] As attached Figure 2 As shown, the stud 13 is provided with a mounting plane 14 on the side facing the base 8, the filter screen 9 is placed on the mounting plane 14, and a positioning flange 15 (an integrated structure) for pressing the filter screen 9 is provided on the base 8. The mounting plane 14 is used for the flatness of the filter screen 9 when it is placed, and the positioning flange 15 is used to provide a pressing force on the filter screen 9 to prevent the filter screen 9 from falling off.

[0026] As attached Figure 2 As shown, a first gasket 16 is sandwiched between the positioning flange 15 and the filter screen 9, and a second gasket 17 is sandwiched between the mounting plane 14 and the filter screen 9, so as to realize a flexible connection between the filter screen 9 and the mounting plane 14 and the positioning flange 15, enhance the clamping force on both sides, and reduce the pressure on the edge of the filter screen 9, so as to avoid breakage and deformation at the edge of the filter screen 9 after the base 8 and the ferrule 10 are tightened.

[0027] As attached Figure 2 As shown, the ferrule 10 is provided with a plurality of clearance holes 18, and the buckle 11 is provided with an extended leg 19, a U-shaped abutment portion 20 and a retreat leg 21 (an integrated structure), the U-shaped abutment portion 20 extends toward and abuts against the inlet end 3, one end of the extended leg 19 is connected to the U-shaped abutment portion 20 and is bent and connected to one end of the clearance hole 18, one end of the retreat leg 21 is connected to the U-shaped abutment portion 20, and the other end passes through the clearance hole 18 and extends It extends to one side of the inner wall of the ferrule 10, and a slot 23 is provided on the inner wall of the inlet end 3 to be engaged with the U-shaped abutment portion 20. The U-shaped abutment portion 20 and the slot 23 are engaged to provide a stable support effect. The extended support leg 19 is used to release the abutment force received by the U-shaped abutment portion 20, thereby making a flexible bend to form a giving way effect. When disassembly is required, the retreat support leg 21 is pressed downward, and the retreat support leg 21 drives the U-shaped abutment portion 20 to release the clamping force of the slot 23.

[0028] As attached Figure 3 As shown, a transition surface 24 is provided on one side of the slot 23 near the opening of the inlet end 3. The transition surface 24 is provided in an arc shape to facilitate the U-shaped abutment portion 20 to be clamped in the slot 23 and reduce the wear of the abutment surface of the U-shaped abutment portion 20.

[0029] Attached Figure 2As shown, the first gasket 16 and the second gasket 17 are made of rubber material. The rubber material can achieve flexible contact with the filter screen 9 to prevent the filter screen 9 from deformation and damage.

[0030] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A pneumatic tank bottom valve, comprising a valve body (1) and a pneumatic actuator (2), wherein the valve body (1) is provided with an inlet end (3) and an outlet end (4), and characterized in that: A filter assembly (5) is clamped on the inlet end (3), and the filter assembly (5) comprises a base (8), a filter screen (9) and a ferrule (10). The base (8) and the ferrule (10) are connected by threads, and the filter screen (9) is clamped between the base (8) and the ferrule (10). The ferrule (10) is provided with a plurality of buckles (11), and the ferrule (10) is clamped on the inlet end (3) by the buckles (11).

2. A pneumatic tank bottom valve according to claim 1, characterized in that: The base (8) is provided with a threaded inner wall (12), and the ferrule (10) is provided with a stud (13) adapted to the threaded inner wall (12) on the side facing the base (8), and the stud (13) is screwed onto the threaded inner wall (12).

3. A pneumatic tank bottom valve according to claim 2, characterized in that: A mounting plane (14) is provided on the side of the stud (13) facing the base (8), the filter screen (9) is placed on the mounting plane (14), and a positioning flange (15) for pressing the filter screen (9) is provided on the base (8).

4. A pneumatic tank bottom valve according to claim 3, characterized in that: A first gasket (16) is sandwiched between the positioning flange (15) and the filter screen (9), and a second gasket (17) is sandwiched between the mounting plane (14) and the filter screen (9).

5. The pneumatic tank bottom valve according to claim 1, characterized in that: The ferrule (10) is provided with a plurality of clearance holes (18); the buckle (11) is provided with an extension leg (19), a U-shaped abutment portion (20) and a retreat leg (21); the U-shaped abutment portion (20) extends toward and abuts against one side of the inlet end (3); one end of the extension leg (19) is connected to the U-shaped abutment portion (20) and is bent and connected to one end of the clearance hole (18); one end of the retreat leg (21) is connected to the U-shaped abutment portion (20), and the other end passes through the clearance hole (18) and extends to one side of the inner wall of the ferrule (10) and protrudes; a slot (23) is provided on the inner wall of the inlet end (3) and is engaged with the U-shaped abutment portion (20).

6. A pneumatic tank bottom valve according to claim 5, characterized in that: A transition surface (24) is provided on one side of the slot (23) close to the opening of the inlet end (3), and the transition surface (24) is provided in the shape of an arc surface.

7. The pneumatic tank bottom valve according to claim 4, characterized in that: The first gasket (16) and the second gasket (17) are made of rubber material.

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