Pneumatic diaphragm single-seat regulating valve

Abstract

The utility model relates to the technical field of regulating valves, and provides a pneumatic diaphragm single-seat regulating valve which comprises a valve body, a valve cover is arranged above the valve body, a first fixing mechanism is arranged between the valve body and the valve cover, the valve body and the valve cover are fixedly connected through the first fixing mechanism, a supporting box is arranged above the valve cover, and the supporting box is fixedly connected with the valve cover. A second fixing mechanism is arranged between the valve cover and the supporting box, the valve cover and the supporting box are fixedly connected through the second fixing mechanism, a packing gland and an annular filling pressing plate can be inserted into the connecting position of the supporting box and the valve cover, the top of an annular packing layer is blocked, and sealing of the valve cover and the supporting box is achieved; and through the arranged lining layer, the position penetrating through the valve cover and the valve body can be sealed in the operation process of the valve element, the valve cover and the valve body are blocked, and leakage between the valve cover and the valve body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a pneumatic diaphragm single-seat regulating valve. Background Technology

[0002] The pneumatic diaphragm single-seat control valve is a commonly used industrial automation control device, mainly used to regulate parameters such as flow rate, pressure, and temperature of media in pipelines. It consists of two parts: a pneumatic actuator and a valve body. It typically employs a top-guided structure and a multi-spring actuator, with an S-shaped streamlined flow path. This design gives the pneumatic diaphragm single-seat control valve advantages such as compact structure, light weight, sensitive operation, low pressure drop, large valve capacity, accurate flow characteristics, and convenient maintenance.

[0003] A search revealed an existing patent (CN213839758 U) that discloses a pneumatic diaphragm single-seat regulating valve, comprising a valve body, a fixing block, a mounting frame, a insert plate, and a protective cover. The valve body has a valve cover on its top, a valve seat is fixedly connected to the top of the valve cover, a bracket is mounted on the top of the valve seat, a fixing block is located inside the bracket, and the mounting frame is fixedly connected to the outside of the bracket. An insert plate is located on the side of the mounting frame and is inserted into the fixing block. A pneumatic device is connected to the outside of the mounting frame via screws. Anti-loosening bolts are used to connect the insert plate and the fixing block. This invention, by incorporating a fixing block inside the bracket and combining it with a specially structured mounting frame, effectively solves the problem of... The traditional pneumatic diaphragm single-seat regulating valve addresses the issues of inconvenient position adjustment and installation / removal during use. By incorporating fixing blocks on both sides of the bracket, users can choose the installation position of the pneumatic device in confined spaces. Combined with the insert plates on the side of the mounting frame, securing the pneumatic device is as simple as inserting the plates into the fixing blocks and tightening them. This completes the securing of the mounting frame and the external pneumatic device, facilitating quick installation and disassembly and greatly improving ease of use. The overall structure is simple and very convenient to operate.

[0004] However, the above solution only provides protection for the installation location. Currently, during the operation of the regulating valve, the valve cover and valve core are usually fixed with screws and nuts. Under the long-term impact of water flow in the flow channel, they are prone to loosening and leakage. The sealing performance is not high enough, and manual inspection is usually required for regular inspection to check for leakage, which is not conducive to saving manpower.

[0005] In view of this, the present invention proposes a pneumatic diaphragm single-seat regulating valve. Utility Model Content

[0006] This utility model proposes a pneumatic diaphragm single-seat regulating valve, which solves the problem in related technologies where the valve cover and valve core are usually fixed with screws and nuts during the operation of the regulating valve, which is prone to loosening and leakage under the long-term impact of water flow in the flow channel.

[0007] The technical solution of this utility model is as follows: A pneumatic diaphragm single-seat regulating valve includes a valve body; a valve cover is provided above the valve body; a first fixing mechanism is provided between the valve body and the valve cover; the valve body and the valve cover are fixedly connected by the first fixing mechanism; a support box is provided above the valve cover; a second fixing mechanism is provided between the valve cover and the support box; the valve cover and the support box are fixedly connected by the second fixing mechanism; a valve stem is inserted and connected from top to bottom at the central axis position inside the support box, the valve cover, and the valve body; a liner is fixedly connected to the surface of the valve stem located inside the valve cover and the valve body; a valve core is fixedly connected to the bottom of the valve stem; the valve core is located inside the valve body; the bottom of the support box is fitted to the top of the valve cover; there are annular gaps between the bottom of the support box and the valve stem penetration position, and between the valve core and the valve cover at the upper part of the valve cover where the valve core penetrates; a packing gland is provided at the lower part inside the support box; annular packing gland is fixedly connected to the bottom of the packing gland. The system includes a pressurizing plate, an annular filling pressure plate inserted into the annular gap, a packing gland and a support box fixedly connected by a third fixing mechanism, an annular packing layer inside the annular gap, an annular filling pressure plate sealing the top of the annular packing layer, a height measuring scale fixedly connected to one side inside the support box, a pointer fixedly connected to the valve stem at the upper part of the support box pointing to the scale position of the height measuring scale, an actuator and accessories fixedly connected to the top of the valve stem, an observation window on one side of the support box, and a loosening anti-leakage mechanism between the valve body and the valve cover. The packing gland and annular filling pressure plate can be inserted into the connection between the support box and the valve cover to seal the top of the annular packing layer, thus sealing the valve cover and the support box. The lining can seal the position penetrating the valve cover and valve body during valve core operation, preventing leakage between the valve cover and valve body.

[0008] Preferably, the outer side of the annular filling pressure plate is fitted with the lining inside the valve body and valve cover, and the inner side of the annular filling pressure plate is fitted with the lining on the surface of the valve stem. By sealing the valve body and valve cover with the annular filling pressure plate and the annular packing layer, water leakage at the connection end of the valve body and valve cover can be avoided.

[0009] Preferably, the first fixing mechanism includes a first nut and a first bolt. The first bolt passes through the protruding fixing rings provided at the top of the valve body and the bottom of the valve cover. The upper and lower ends of the first bolt are located on the upper and lower sides of the upper and lower fixing rings, respectively. The first bolt is threaded with a first nut at both ends. The first fixing mechanism is distributed in a ring at equal intervals inside the upper and lower fixing rings.

[0010] Preferably, the second fixing mechanism includes a second nut and a second bolt. The second bolt passes through the fixing ring protruding from the top of the valve cover and the bottom plate of the support box. The upper and lower ends of the second bolt are threaded with second nuts. The second fixing mechanism is distributed in a ring at equal intervals at the bottom of the support box.

[0011] Preferably, the third fixing mechanism includes a third nut and a third bolt. The third bolt penetrates the packing gland, the bottom of the third bolt is inserted into the bottom plate of the support box and is threadedly connected to the bottom plate of the support box, and the top of the third bolt is threadedly connected to the third nut. The third fixing mechanism is distributed in a ring at equal intervals at the bottom of the support box.

[0012] Preferably, the loosening and leak-proof mechanism includes an annular insertion groove, an annular plug, a plastic folded tube, and a touch sensor. The top of the valve body and the bottom of the valve cover are provided with annular insertion grooves. The upper and lower annular insertion grooves are interconnected. Annular plugs are inserted into the interior of the upper and lower annular insertion grooves. A plastic folded tube is fixedly connected between the annular plugs on both sides. The annular plugs are inserted into the interior of the annular insertion groove in an annular shape.

[0013] Preferably, a touch sensor is fixedly connected inside the annular insertion groove. The touch sensor is energized by contacting one end of the annular plug, and a power failure warning is provided. The annular plug contacts the touch sensor in its natural state. The touch sensor enables automatic detection of water leakage, saving manpower.

[0014] Preferably, the inserted end of the annular plug has a rounded head structure, and the inner and outer side walls of the annular plug are respectively fitted and sealed to the inner side walls of the annular insertion groove. By fitting and sealing the annular insertion groove with the annular plug, water can be blocked by the annular plug. When the first fixing mechanism loosens and separates, and the plastic folded tube is impacted by water flow, the annular plug disengages from the contact sensor and generates a pre-set alarm. At this time, the plastic folded tube can still seal and prevent leakage between the valve body and the valve cover.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this utility model, the packing gland and the annular packing pressure plate can be inserted into the connection between the support box and the valve cover to seal the top of the annular packing layer, thereby sealing the valve cover and the support box. The liner can seal the position that penetrates the valve cover and the valve body during the operation of the valve core, thereby sealing the valve cover and the valve body and preventing leakage between the valve cover and the valve body.

[0017] In this invention, the valve body and valve cover are sealed by an annular filling pressure plate and an annular packing layer to prevent water leakage at the connection end of the valve body and valve cover. The touch sensor can automatically detect water leakage, saving manpower. The annular plug can form a barrier to block water by fitting and sealing the annular insertion groove. When the first fixing mechanism loosens and separates, and the plastic folded tube is impacted by water flow, the annular plug will disengage from the touch sensor and generate a pre-set alarm. At this time, the plastic folded tube can still seal and prevent leakage between the valve body and valve cover. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention from one side view;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another side view;

[0021] Figure 3 This is a three-dimensional schematic diagram of the present invention viewed from below;

[0022] Figure 4 This is a front view structural diagram of the present invention;

[0023] Figure 5 This is a front view of the internal structure of this utility model;

[0024] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A;

[0025] Figure 7 This utility model Figure 5 A magnified structural diagram at point B in the middle.

[0026] In the diagram: 1. Valve body; 2. Liner; 3. Valve core; 4. Valve cover; 5. First nut; 6. First bolt; 7. Annular packing layer; 8. Packing gland; 9. Second nut; 10. Second bolt; 11. Third nut; 12. Third bolt; 13. Valve stem; 14. Actuator and accessories; 15. Height measuring ruler; 16. Pointer; 17. Support box; 18. Annular packing pressure plate; 19. Annular insertion groove; 20. Annular plug; 21. Plastic folded tube; 22. Touch sensor; 23. Observation window. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0028] A preferred embodiment of the pneumatic diaphragm single-seat regulating valve provided by this utility model is, for example... Figures 1 to 7 As shown: A pneumatic diaphragm single-seat regulating valve includes a valve body 1. A valve cover 4 is disposed above the valve body 1. A first fixing mechanism is disposed between the valve body 1 and the valve cover 4, and the valve body 1 and the valve cover 4 are fixedly connected by the first fixing mechanism. A support box 17 is disposed above the valve cover 4. A second fixing mechanism is disposed between the valve cover 4 and the support box 17, and the valve cover 4 and the support box 17 are fixedly connected by the second fixing mechanism. A valve stem 13 is inserted and connected from top to bottom at the central axis position inside the support box 17, the valve cover 4, and the valve body 1. A liner 2 is fixedly connected to the surface of the valve stem 13 located inside the valve cover 4 and the valve body 1. A valve core 3 is fixedly connected to the bottom of the valve stem 13. The valve core 3 is located inside the valve body 1. The bottom of the support box 17 is attached to the top of the valve cover 4. The area between the bottom of the support box 17 and the point where the valve stem 13 passes through, and the area inside the valve cover 4, are located at the valve body 1. There is an annular gap between the core 3 and the valve core 3. A packing gland 8 is provided at the bottom of the support box 17. An annular filling pressure plate 18 is fixedly connected to the bottom of the packing gland 8. The annular filling pressure plate 18 is inserted into the annular gap. The packing gland 8 and the support box 17 are fixedly connected by a third fixing mechanism. An annular packing layer 7 is provided inside the annular gap. The annular filling pressure plate 18 seals the top of the annular packing layer 7. A height measuring ruler 15 is fixedly connected to one side inside the support box 17. A pointer 16 is fixedly connected to the valve stem 13 at the upper position inside the support box 17. The pointer 16 points to the scale position of the height measuring ruler 15. An actuator and accessory 14 are fixedly connected to the top of the valve stem 13. An observation window 23 is provided on one side of the support box 17. A loosening and anti-leakage mechanism is also provided between the valve body 1 and the valve cover 4.

[0029] It should be noted that existing control valves still have certain shortcomings. They can only protect the installation position, but during the operation of the control valve, the valve cover and valve core are usually fixed with screws and nuts. Under the long-term impact of water flow in the flow channel, they are prone to loosening and leakage.

[0030] In this embodiment, the packing gland 8 and the annular packing plate 18 can be inserted into the connection between the support box 17 and the valve cover 4 to seal the top of the annular packing layer 7, thereby sealing the valve cover 4 and the support box 17. The liner 2 can seal the position penetrating the valve cover 4 and the valve body 1 during the operation of the valve core 3, thereby sealing the valve cover 4 and the valve body 1 and preventing leakage between the valve cover 4 and the valve body 1.

[0031] In a further preferred embodiment of the present invention, the outer side of the annular filling pressure plate 18 is fitted with the lining 2 provided inside the valve body 1 and the valve cover 4, and the inner side of the annular filling pressure plate 18 is fitted with the lining 2 on the surface of the valve stem 13.

[0032] In this embodiment, sealing the valve body 1 and valve cover 4 with the annular filling pressure plate 18 and the annular packing layer 7 can prevent water leakage at the connection end of the valve body 1 and valve cover 4.

[0033] In a further preferred embodiment of the present invention, the first fixing mechanism includes a first nut 5 and a first bolt 6. The first bolt 6 passes through the protruding fixing rings provided at the top of the valve body 1 and the bottom of the valve cover 4. The upper and lower ends of the first bolt 6 are respectively located on the upper and lower sides of the upper and lower fixing rings. The first nut 5 is threaded to both ends of the first bolt 6. The first fixing mechanism is distributed in a ring at equal intervals inside the upper and lower fixing rings.

[0034] In a further preferred embodiment of the present invention, the second fixing mechanism includes a second nut 9 and a second bolt 10. The second bolt 10 passes through the fixing ring protruding from the top of the valve cover 4 and the bottom plate of the support box 17. The upper and lower ends of the second bolt 10 are threaded with the second nut 9. The second fixing mechanism is distributed in a ring at equal intervals at the bottom of the support box 17. Example 2

[0035] Based on Embodiment 1, a preferred embodiment of the pneumatic diaphragm single-seat regulating valve provided by this utility model is, for example... Figures 1 to 7 As shown: The third fixing mechanism includes a third nut 11 and a third bolt 12. The third bolt 12 penetrates the packing gland 8. The bottom of the third bolt 12 is inserted into the bottom plate of the support box 17 and is threadedly connected to the bottom plate of the support box 17. The top of the third bolt 12 is threadedly connected to the third nut 11. The third fixing mechanism is distributed in a ring at equal intervals in the lower part of the support box 17.

[0036] In a further preferred embodiment of this utility model, the loosening and leak-proof mechanism includes an annular insertion groove 19, an annular plug 20, a plastic folded tube 21, and a touch sensor 22. Annular insertion grooves 19 are provided on the top of the valve body 1 and the bottom of the valve cover 4. The upper and lower annular insertion grooves 19 are interconnected. Annular plugs 20 are inserted into the interior of the upper and lower annular insertion grooves 19. A plastic folded tube 21 is fixedly connected between the annular plugs 20 on both sides. The annular plugs 20 are inserted into the interior of the annular insertion groove 19 in an annular shape.

[0037] In a further preferred embodiment of the present invention, a touch sensor 22 is fixedly connected inside the annular insertion groove 19. The touch sensor 22 is in contact with the end of the annular plug 20 that is inserted and is energized. A power failure warning is provided. The annular plug 20 contacts the touch sensor 22 in its natural state.

[0038] In this embodiment, the touch sensor 22 enables automatic detection of water leakage, saving manpower.

[0039] In a further preferred embodiment of the present invention, the inserted end of the annular plug 20 has a rounded head structure, and the inner and outer side walls of the annular plug 20 are respectively fitted and sealed to the inner side walls of the annular insertion groove 19.

[0040] In this embodiment, the annular plug 20 is fitted to the sealing annular insertion groove 19 to form a water barrier. When the first fixing mechanism loosens and separates, and the plastic folded tube 21 is impacted by water flow, the annular plug 20 disengages from the contact sensor 22 to generate a pre-set alarm. At this time, the plastic folded tube 21 can still seal and prevent leakage between the valve body 1 and the valve cover 4.

[0041] The working principle of this utility model is as follows: During installation, the packing gland 8 and the annular packing plate 18 are inserted into the connection between the support box 17 and the valve cover 4 to seal the top of the annular packing layer 7, thereby sealing the valve cover 4 and the support box 17. The annular plug 20 is pressed into the annular insertion groove 19, and the annular plugs 20 on both sides form a barrier to block water. When the first fixing mechanism loosens and separates, and the plastic folded tube 21 is impacted by water flow, the annular plug 20 disengages from the contact sensor 22 to generate a pre-set alarm. At this time, the plastic folded tube 21 can still seal the valve body 1 and the valve cover 4 to prevent leakage while waiting for maintenance. During the operation of the valve core 3, the liner 2 seals the position that penetrates the valve cover 4 and the valve body 1, and the sealing of the valve cover 4 and the valve body 1 prevents leakage.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pneumatic thin film single seat control valve characterized by, The utility model provides a valve body (1) is provided with the valve cover (4) on the top, is provided with the first fixed mechanism between valve body (1) and valve cover (4), valve body (1) and valve cover (4) are fixedly connected through the first fixed mechanism, is provided with the support box (17) on the top of valve cover (4), is provided with the second fixed mechanism between valve cover (4) and support box (17), valve cover (4) and support box (17) are fixedly connected through the second fixed mechanism, the middle axis position inside support box (17), valve cover (4) and valve body (1) are inserted and connected from top to bottom with valve stem (13), the surface fixedly connected with lining (2) in the inside position of valve stem (13) in valve cover (4) and valve body (1), the bottom fixedly connected with valve core (3) of valve stem (13), valve core (3) is located in the inside of valve body (1), the bottom of support box (17) is pasted with the top of valve cover (4), there is annular interspace between the bottom of support box (17) and the penetration position of valve stem (13) and between the penetration of valve core (3) and valve core (3) in the top inside valve cover (4), is provided with packing gland (8) in the below of support box (17), the bottom fixedly connected with annular filling pressure plate (18) of packing gland (8), annular filling pressure plate (18) is inserted in the inside of annular interspace, packing gland (8) and support box (17) are fixedly connected through the third fixed mechanism, it is provided with annular packing layer (7) in the inside of annular interspace, annular filling pressure plate (18) seals the top of annular packing layer (7), one side fixedly connected with height measuring scale (15) in the inside of support box (17), the fixedly connected with pointer (16) of valve stem (13) in the position of the top inside support box (17), the pointer (16) points to the scale position of height measuring scale (15), the top fixedly connected with actuator and accessory (14) of valve stem (13), one side of support box (17) is provided with observation window (23), still be provided with loose anti-leakage mechanism between valve body (1) and valve cover (4).

2. The pneumatic thin film single seat control valve according to claim 1, wherein, The outside of annular filling pressure plate (18) is pasted with lining (2) inside valve body (1) and valve cover (4), the inside of annular filling pressure plate (18) is pasted with lining (2) on the surface of valve stem (13).

3. The pneumatic thin film single seat control valve according to claim 1, wherein, The first fixed mechanism includes first nut (5) and first bolt (6), the first bolt (6) is passed through the top of valve body (1) and the bottom of the outside protruding fixed ring of valve cover (4) and is arranged, the upper and lower two ends of first bolt (6) are located on the upper and lower two sides of the upper and lower two fixed rings respectively, the both ends of first bolt (6) are all threadedly connected with first nut (5), and the first fixed mechanism is annularly equidistantly distributed in the inside of the upper and lower two fixed rings.

4. The pneumatic thin film single seat control valve according to claim 1, wherein, The second fixing mechanism comprises a second nut (9) and a second bolt (10), the second bolt (10) penetrates the fixing ring protruded on the top of the valve cover (4) and the bottom plate of the supporting box (17), the upper and lower ends of the second bolt (10) are threadedly connected with the second nut (9), and the second fixing mechanism is annularly and equidistantly distributed on the bottom of the supporting box (17).

5. The pneumatic thin film single seat control valve according to claim 1, wherein, The third fixing mechanism comprises a third nut (11) and a third bolt (12), the third bolt (12) penetrates the packing gland (8), the bottom of the third bolt (12) is inserted into the inside of the bottom plate of the supporting box (17) and is threadedly connected with the bottom plate of the supporting box (17), the top of the third bolt (12) is threadedly connected with the third nut (11), and the third fixing mechanism is annularly and equidistantly distributed below the inside of the supporting box (17).

6. The pneumatic thin film single seat control valve according to claim 1, wherein, The anti-loosening leakage prevention mechanism comprises annular insertion grooves (19), annular plugs (20), plastic folding tubes (21) and touch sensors (22), the top of the valve body (1) and the bottom of the valve cover (4) are provided with the annular insertion grooves (19), the annular insertion grooves (19) on the upper and lower sides are communicated with each other, the annular plugs (20) are inserted and connected in the inside of the annular insertion grooves (19) on the upper and lower sides, the plastic folding tubes (21) are fixedly connected between the annular plugs (20) on the two sides, and the annular plugs (20) are annularly inserted into the inside of the annular insertion grooves (19).

7. The pneumatic diaphragm single seat control valve according to claim 6, wherein, The touch sensors (22) are fixedly connected in the inside of the annular insertion grooves (19), one end of the annular plug (20) is in contact with the touch sensor (22) and is electrified, the annular plug (20) is in contact with the touch sensor (22) in a natural state, and the touch sensor (22) is provided with a power-off early warning.

8. The pneumatic diaphragm single seat control valve according to claim 7, wherein, One end of the annular plug (20) is a round head structure, and the inner and outer side walls of the annular plug (20) are respectively attached and sealed to the two inner walls of the annular insertion groove (19).

Images