Cage type sleeve adjusting valve

Abstract

The cage type sleeve adjusting valve comprises a pneumatic actuator, a valve cover, a valve body, a valve rod and a sleeve, an inlet flow channel and an outlet flow channel are arranged in the valve body, a flow passing opening is formed between the inlet flow channel and the outlet flow channel, a positioning groove is formed in the upper end of the flow passing opening, the valve cover is installed at the upper end of the valve body, and the sleeve is pressed on the positioning groove. A plurality of adjusting holes are formed in the side portion of the sleeve in the circumferential direction, the valve rod is arranged on the valve deck in a penetrating mode, the outer end of the valve rod is connected with the output end of the pneumatic actuator, a valve element is installed at the inner end of the valve rod, and the outer circle face of the valve element is tightly attached to the inner circle face of the sleeve. A connecting sleeve is arranged at the upper end of the valve element, the inner diameter of the connecting sleeve is equal to the outer diameter of the valve rod, the lower end of the valve rod is sleeved with the connecting sleeve, a plurality of connecting blocks are arranged on the inner circle face of the connecting sleeve, a plurality of connecting grooves matched with the connecting blocks are formed in the outer circle face of the valve rod, and each connecting groove comprises an inlet and outlet channel and a limiting channel. The valve element is very convenient to disassemble and assemble, and the connecting structure is firm and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a cage-type sleeve regulating valve. Background Art

[0002] The cage-type control valve is a pressure-balanced control valve with a sleeve-guided pilot-operated valve core. It utilizes fluid pressure to achieve rapid valve core actuation, requiring minimal operating force. It also features a single-seat seal, resulting in a highly accurate flow characteristic curve that complies with IEC534-1 standards. The control valve offers excellent dynamic stability, low noise, and cavitation resistance, making it suitable for controlling high-pressure differential fluids at various temperatures. Equipped with either a multi-spring diaphragm actuator or an electric actuator, it offers a compact design and high output force.

[0003] Chinese utility model patent application number CN201310589256.6 discloses an elastic C-ring double-seat sealed cage-type regulating valve, whose valve core assembly and valve stem are connected by threads and spot welded at the thread head. Because of its convenient connection and assembly and very strong connection structure, this connection method has become the most common method on the market.

[0004] During actual use, the valve core will be subject to a certain degree of wear and tear due to the long-term up and down movement of the valve core due to the erosion of the medium and the friction of the sleeve. The valve core needs to be replaced after regular use to prevent leakage when the valve is closed. While the above connection method is easy to assemble, it is very difficult to disassemble the valve core later due to the welding structure. Forced disassembly can even easily damage the valve stem surface and valve stem threads.

[0005] Therefore, it is necessary to improve the existing cage sleeve regulating valve. Utility Model Content

[0006] The purpose of the utility model is to provide a cage-type sleeve regulating valve. The valve core of the utility model is not only very convenient to disassemble and assemble, but also has a firm and reliable connection structure.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cage-type sleeve regulating valve, comprising a pneumatic actuator, a valve cover, a valve body, a valve stem and a sleeve, wherein the valve body is provided with an inlet flow channel and an outlet flow channel, a flow port is provided between the inlet flow channel and the outlet flow channel, a positioning groove is provided at the upper end of the flow port, the valve cover is mounted on the upper end of the valve body, and the sleeve is pressed against the positioning groove, a plurality of regulating holes are opened on the side of the sleeve along the circumferential direction, the valve stem is provided through the valve cover, and the outer end of the valve stem is connected to the pneumatic actuator. The output end is connected to the valve stem, and a valve core is installed at the inner end of the valve stem, and the outer circumferential surface of the valve core is tightly fitted with the inner circumferential surface of the sleeve; the upper end of the valve core is provided with a connecting sleeve, the inner diameter of the connecting sleeve is equivalent to the outer diameter of the valve stem, and the connecting sleeve is sleeved on the lower end of the valve stem, and a plurality of connecting blocks are provided on the inner circumferential surface of the connecting sleeve, and a plurality of connecting grooves matching the connecting blocks are provided on the outer circumferential surface of the valve stem, and the connecting groove includes an inlet and outlet channel extending upward from the lower end of the valve stem and a limiting channel extending from the inner end of the inlet and outlet channel along the circumference of the valve stem.

[0008] By adopting the above technical solution, when installing the valve core, align the connecting block on the valve core with the inlet and outlet channels of the valve stem connecting groove, push the valve core upward to make the connecting block slide into the inner end of the inlet and outlet channels of the connecting groove, and then rotate the valve core to make the connecting block on the valve core slide into the inner end of the limiting channel of the connecting groove, so as to realize the coordinated connection between the valve core and the valve stem. When removing the valve core, the reverse operation can be performed, and the disassembly and assembly are very convenient. Moreover, when the valve stem drives the valve core to move axially, the valve core will not produce axial deviation. It has the advantage of a firm and reliable connection structure, which is conducive to early assembly and later disassembly and maintenance operations.

[0009] The utility model is further configured such that an upwardly protruding arc-shaped damping portion is provided on the lower end surface of the limiting channel, the distance between the upper end of the arc-shaped damping portion and the upper end surface of the limiting channel is less than the thickness of the connecting block, and a limiting space for limiting the connecting block is formed between the arc-shaped damping portion and the inner end of the limiting channel.

[0010] By adopting the above technical solution, the connecting block on the valve core is pushed into the inner end of the limiting channel. When the connecting block cooperates with the arc-shaped damping part, the connecting block is deformed until the connecting block slides into the limiting space. The connecting block is locked in the limiting space, and the arc-shaped damping part prevents the connecting block from sliding out of the limiting space. The valve core needs to be rotated with force so that the connecting block can overcome the resistance of the arc-shaped damping part and slide out of the limiting space, thereby further improving the stability of the connection structure between the valve core and the valve stem.

[0011] The present invention is further configured to include a bottom cover, a connecting shaft is provided at the lower end of the valve stem, an axial hole coaxial with the connecting sleeve is provided on the valve core, the connecting shaft passes through the axial hole, and the bottom cover is installed on the lower end of the connecting shaft by a locking screw, and an upwardly extending positioning sleeve is provided at the outer periphery of the bottom cover, the inner circular surface of the positioning sleeve is tightly fitted with the outer circular surface of the lower end of the connecting shaft, the upper end of the positioning sleeve is tightly fitted with the lower end surface of the valve core, and a plurality of positioning protrusions are provided at the upper end of the positioning sleeve, and a plurality of positioning recesses are provided at the lower end surface of the valve core that match the positioning protrusions.

[0012] By adopting the above technical solution, the bottom cover is used to lock the valve core and the valve stem, which can further prevent the valve core from rotating circumferentially relative to the valve stem when the valve core moves, thereby effectively ensuring the reliability of the connection structure between the valve core and the valve stem.

[0013] The present invention is further configured such that an anti-loosening gasket is sandwiched between the screw head of the locking screw and the bottom cover.

[0014] By adopting the above technical solution, when tightening the locking screw, the anti-loosening gasket can provide the locking screw with a reverse pre-tightening force, thereby increasing the thread friction force on the locking screw, making the connection more secure and less likely to loosen due to water impact.

[0015] The utility model is further configured such that a static conical sealing portion is respectively provided on the inner circumference of the sleeve at positions above and below the corresponding adjustment hole, and two dynamic conical sealing portions are respectively matched with the corresponding static conical sealing portions on the outer circumference of the valve core.

[0016] By adopting the above technical solution, the design does not need to set up an additional valve seat. It only needs the valve stem to drive the valve core so that the dynamic conical sealing part on the valve core and the static conical sealing part on the sleeve are pressed tightly. The sealing cooperation between the valve core and the sleeve can be achieved, and the adjusting hole on the sleeve is blocked to achieve the closure of the valve. The structure is simpler and can be easily installed and produced.

[0017] The utility model is further configured such that a plurality of pressure-stabilizing holes are provided through the upper end of the valve core.

[0018] By adopting the above technical solution, the pressure balance in the space above and below the valve core can be ensured, making its up and down movement smoother.

[0019] The utility model is further configured such that the valve stem includes an upper rod and a lower rod, the upper end of the lower rod is provided with a positioning shaft, the lower end of the upper rod is provided with a positioning groove that fits with the positioning shaft, and the two are fixed by a cylindrical pin after being matched.

[0020] By adopting the above technical solution, the valve stem is divided into an upper stem and a lower stem, which are detachably connected together. Compared with the structure of an integrated long valve stem where the coaxiality is difficult to ensure, this design has lower processing accuracy requirements and is more convenient to process.

[0021] The utility model is further configured such that a reinforcement sleeve is provided on the outer periphery of the connection portion between the upper rod and the lower rod, and a plurality of locking screws are radially threadedly connected to the reinforcement sleeve, and some of the locking screws are tightly pressed against the outer circular surface of the upper rod, and the other part of the locking screws are tightly pressed against the outer circular surface of the lower rod.

[0022] By adopting the above technical solution, the strength of the connection between the upper rod and the lower rod can be improved, making this part less likely to undergo radial deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 3 This is a three-dimensional diagram of the connection structure between the valve stem and the valve core of the utility model;

[0026] Figure 4 for Figure 3 Exploded view of the structure;

[0027] Figure 5 This is a structural diagram of the valve core of the utility model;

[0028] Figure 6 This is a structural diagram of the lower rod of the utility model;

[0029] Figure 7 for Figure 1 A schematic diagram of the enlarged structure of the middle part B;

[0030] Figure 8 for Figure 1 Schematic diagram of the enlarged structure of part C in the middle.

[0031] In the figure: 1. Pneumatic actuator; 2. Valve cover; 3. Valve body; 4. Valve stem; 5. Sleeve; 6. Inlet flow channel; 7. Outlet flow channel; 8. Flow port; 9. Positioning groove; 10. Adjustment hole; 11. Valve core; 12. Connecting sleeve; 13. Connecting block; 14. Connecting groove; 15. Inlet and outlet channel; 16. Limit channel; 17. Arc damping part; 18. Limit space; 19. Bottom cover; 20. Connecting shaft; 21. Shaft hole; 22. Locking screw; 23. Positioning sleeve; 24. Positioning protrusion; 25. Positioning recess; 26. Anti-loosening gasket; 27. Static conical sealing part; 28. Dynamic conical sealing part; 29. ​​Pressure stabilizing hole; 30. Upper rod; 31. Lower rod; 32. Positioning shaft; 33. Positioning groove; 34. Cylindrical pin; 35. Reinforcement sleeve; 36. Locking screw DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example: As shown in the attached Figures 1 to 8 The cage-type sleeve regulating valve shown in the figure comprises a pneumatic actuator 1, a valve cover 2, a valve body 3, a valve stem 4 and a sleeve 5. An inlet flow channel 6 and an outlet flow channel 7 are provided in the valve body 3, and a flow port 8 is provided between the inlet flow channel 6 and the outlet flow channel 7. A positioning groove 9 is provided at the upper end of the flow port 8. The valve cover 2 is mounted on the upper end of the valve body 3 by bolts, and a sealing gasket is sandwiched between the two. The valve cover 2 presses the sleeve 5 on the positioning groove 9, that is, the lower end of the sleeve 5 fits in the positioning groove 9, and a sealing gasket is provided between the two. A plurality of adjusting holes 10 are opened on the side of the sleeve 5 along the circumferential direction. The valve stem 4 is arranged on the valve cover 2, and the outer end of the valve stem 4 is connected to the output end of the pneumatic actuator 1. A valve core 11 is installed at the inner end, and the outer circumferential surface of the valve core 11 fits tightly with the inner circumferential surface of the sleeve 5; a connecting sleeve 12 is provided at the upper end of the valve core 11, and the inner diameter of the connecting sleeve 12 is equivalent to the outer diameter of the valve stem 4. The connecting sleeve 12 is sleeved on the lower end of the valve stem 4, and a plurality of connecting blocks 13 are provided on the inner circumferential surface of the connecting sleeve 12. The connecting sleeve 12 and the connecting block 13 are an integral structure, and a plurality of connecting grooves 14 are provided on the outer circumferential surface of the valve stem 4 to cooperate with the connecting block 13. The connecting groove 14 includes an inlet and outlet channel 15 extending upward from the lower end of the valve stem 4 and a limiting channel 16 extending from the inner end of the inlet and outlet channel 15 along the circumference of the valve stem 4. The height of the limiting channel 16 is equivalent to the thickness of the connecting block 13. When installing the valve core 11, align the connecting block 13 on the valve core 11 with the inlet and outlet channel 15 of the connecting groove 14 of the valve stem 4, push the valve core 11 upward to make the connecting block 13 slide into the inner end of the inlet and outlet channel 15 of the connecting groove 14, and then rotate the valve core 11 to make the connecting block 13 on the valve core 11 slide into the inner end of the limiting channel 16 of the connecting groove 14, so that the valve core 11 and the valve stem 4 can be connected. When removing the valve core 11, just reverse the operation, which is very convenient for disassembly and assembly, and when the valve stem 4 drives the valve core 11 to move axially, the valve core 11 will not produce axial deviation, which has the advantage of a firm and reliable connection structure, which is conducive to early assembly and later disassembly and maintenance operations.

[0034] As attached Figure 6As shown, the lower end surface of the limiting channel 16 is provided with an upwardly protruding arc-shaped damping portion 17. The arc-shaped damping convex portion, i.e., the upper end surface, is an arc surface. The distance between the upper end of the arc-shaped damping portion 17 and the upper end surface of the limiting channel 16 is less than the thickness of the connecting block 13. A limiting space 18 is formed between the arc-shaped damping portion 17 and the inner end of the limiting channel 16 for limiting the position of the connecting block 13. The connecting block 13 on the valve core 11 is pushed into the inner end of the limiting channel 16. When the arc-shaped damping portion 17 cooperates with the connecting block 13, the connecting block 13 deforms until the connecting block 13 slides into the limiting space 18, whereupon the connecting block 13 is locked in the limiting space 18. The arc-shaped damping portion 17 prevents the connecting block 13 from sliding out of the limiting space 18. The valve core 11 needs to be rotated forcefully for the connecting block 13 to overcome the resistance of the arc-shaped damping portion 17 and slide out of the limiting space 18, thereby further improving the stability of the connection structure between the valve core 11 and the valve stem 4.

[0035] As attached Figure 2 As shown, it also includes a bottom cover 19, a connecting shaft 20 is provided at the lower end of the valve stem 4, and an axial hole 21 coaxial with the connecting sleeve 12 is provided on the valve core 11, and the connecting shaft 20 passes through the axial hole 21, and the inner diameter of the axial hole 21 is equivalent to the outer diameter of the connecting shaft 20, and the bottom cover 19 is installed on the lower end of the connecting shaft 20 by a locking screw 22, and the outer periphery of the bottom cover 19 is provided with an upwardly extending positioning sleeve 23, the inner circular surface of the positioning sleeve 23 is tightly fitted with the outer circular surface of the lower end of the connecting shaft 20, the upper end of the positioning sleeve 23 is tightly fitted with the lower end surface of the valve core 11, and the upper end of the positioning sleeve 23 is provided with a plurality of positioning protrusions 24, and the lower end surface of the valve core 11 is provided with a plurality of positioning recesses 25 that fit with the positioning protrusions 24. The bottom cover 19 is used to lock the valve core 11 and the valve stem 4, which can further prevent the valve core 11 from rotating circumferentially relative to the valve stem 4 when the valve core 11 moves, thereby effectively ensuring the reliability of the connection structure between the valve core 11 and the valve stem 4.

[0036] As attached Figure 2 As shown, a locking washer 26 is sandwiched between the screw head of the locking screw 22 and the bottom cover 19. When the locking screw 22 is tightened, the locking washer 26 provides a reverse pre-tightening force to the locking screw 22, thereby increasing the thread friction force on the locking screw 22, making the connection more secure and less likely to loosen due to water impact.

[0037] As attached Figure 7As shown, the inner surface of the sleeve 5 is provided with a static conical sealing portion 27 at positions above and below the corresponding adjustment hole 10. The outer surface of the valve core 11 is provided with two dynamic conical sealing portions 28 that respectively cooperate with the corresponding static conical sealing portions 27. This design does not require an additional valve seat. The valve stem 4 only needs to drive the valve core 11, so that the dynamic conical sealing portion 28 on the valve core 11 and the static conical sealing portion 27 on the sleeve 5 are tightly pressed. The valve core 11 and sleeve 5 can achieve a sealed cooperation, block the adjustment hole 10 in the sleeve 5, and close the valve. This has a simpler structure and is easy to install and produce.

[0038] As attached Figure 5 As shown, a plurality of pressure-stabilizing holes 29 are provided through the upper end of the valve core 11. This design can ensure that the pressure in the space above and below the valve core 11 is balanced, making its up and down movement smoother.

[0039] As attached Figure 8 As shown, the valve stem 4 includes an upper rod 30 and a lower rod 31. The upper end of the lower rod 31 is provided with a positioning shaft 32, and the lower end of the upper rod 30 is provided with a positioning groove 33 that matches the positioning shaft 32. The two are fixed together by a cylindrical pin 34. That is, the positioning shaft and the lower rod 31 corresponding to the positioning groove 33 are both provided with radial circular holes for the cylindrical pin 34 to pass through. The valve stem 4 is divided into an upper rod 30 and a lower rod 31, and the two are detachably connected together. Compared with the structure of the one-piece long valve stem 4, where the coaxiality is difficult to ensure, this design has lower processing precision requirements and is more convenient to process.

[0040] As attached Figure 8 As shown, a reinforcement sleeve 35 is provided around the outer periphery of the connection between the upper rod 30 and the lower rod 31. The inner diameter of the reinforcement sleeve 35 is equivalent to the outer diameter of the valve stem 4. A plurality of locking screws 36 are radially threadedly connected to the reinforcement sleeve 35, and some of the locking screws 36 are tightly abutted against the outer circumference of the upper rod 30, while the other part of the locking screws 36 are tightly abutted against the outer circumference of the lower rod 31. Specifically, two groups of locking screws 36 can be provided, each group having four locking screws 36. Screw holes for the locking screws 36 to be screwed into are provided on the side of the reinforcement sleeve 35. The inner ends of the four upper locking screws 36 are tightly abutted against the upper rod 30, while the inner ends of the four lower locking screws 36 are tightly abutted against the lower rod 31. This design can enhance the strength of the connection between the upper rod 30 and the lower rod 31, making it less susceptible to radial deformation.

Claims

1. A cage-type sleeve regulating valve, comprising a pneumatic actuator (1), a valve cover (2), a valve body (3), a valve stem (4) and a sleeve (5), wherein the valve body (3) is provided with an inlet flow channel (6) and an outlet flow channel (7), a flow port (8) is provided between the inlet flow channel (6) and the outlet flow channel (7), a positioning groove (9) is provided at the upper end of the flow port (8), the valve cover (2) is mounted on the upper end of the valve body (3), and the sleeve (5) is pressed against the positioning groove (9), a plurality of regulating holes (10) are opened on the side of the sleeve (5) along the circumferential direction, the valve stem (4) is provided on the valve cover (2), and the outer end of the valve stem (4) is connected to the output end of the pneumatic actuator (1), a valve core (11) is installed at the inner end of the valve stem (4), and the outer circumferential surface of the valve core (11) is tightly fitted with the inner circumferential surface of the sleeve (5); and the characteristics are: The upper end of the valve core (11) is provided with a connecting sleeve (12), the inner diameter of the connecting sleeve (12) is equivalent to the outer diameter of the valve stem (4), the connecting sleeve (12) is sleeved on the lower end of the valve stem (4), and a plurality of connecting blocks (13) are provided on the inner circular surface of the connecting sleeve (12), and a plurality of connecting grooves (14) matching the connecting blocks (13) are provided on the outer circular surface of the valve stem (4), and the connecting grooves (14) include an inlet and outlet channel (15) extending upward from the lower end of the valve stem (4) and a limit channel (16) extending from the inner end of the inlet and outlet channel (15) along the circumference of the valve stem (4).

2. The cage-type sleeve regulating valve according to claim 1, characterized in that: An upwardly protruding arc-shaped damping portion (17) is provided on the lower end surface of the limiting channel (16); the distance between the upper end of the arc-shaped damping portion (17) and the upper end surface of the limiting channel (16) is less than the thickness of the connecting block (13); and a limiting space (18) for limiting the connecting block (13) is formed between the arc-shaped damping portion (17) and the inner end of the limiting channel (16).

3. The cage-type sleeve regulating valve according to claim 1, characterized in that: The valve stem (4) further comprises a bottom cover (19), a connecting shaft (20) is provided at the lower end thereof, an axial hole (21) coaxial with the connecting sleeve (12) is provided on the valve core (11), the connecting shaft (20) passes through the axial hole (21), and the bottom cover (19) is mounted on the lower end of the connecting shaft (20) by a locking screw (22), an upwardly extending positioning sleeve (23) is provided on the outer periphery of the bottom cover (19), the inner circular surface of the positioning sleeve (23) is tightly fitted with the outer circular surface of the lower end of the connecting shaft (20), the upper end of the positioning sleeve (23) is tightly fitted with the lower end surface of the valve core (11), and a plurality of positioning protrusions (24) are provided on the upper end of the positioning sleeve (23), and a plurality of positioning recesses (25) matching the positioning protrusions (24) are provided on the lower end surface of the valve core (11).

4. The cage-type sleeve regulating valve according to claim 3, characterized in that: An anti-loosening washer (26) is sandwiched between the screw head of the locking screw (22) and the bottom cover (19).

5. The cage-type sleeve regulating valve according to claim 1, characterized in that: The inner circumference of the sleeve (5) is provided with a static conical sealing portion (27) at positions above and below the corresponding adjustment hole (10), and the outer circumference of the valve core (11) is provided with two dynamic conical sealing portions (28) respectively matched with the corresponding static conical sealing portions (27).

6. The cage-type sleeve regulating valve according to claim 1, characterized in that: The upper end of the valve core (11) is provided with a plurality of pressure-stabilizing holes (29).

7. The cage-type sleeve regulating valve according to claim 1, characterized in that: The valve stem (4) comprises an upper rod (30) and a lower rod (31), the upper end of the lower rod (31) is provided with a positioning shaft (32), the lower end of the upper rod (30) is provided with a positioning groove (33) that fits with the positioning shaft (32), and the two are fixed by a cylindrical pin (34) after being matched.

8. The cage-type sleeve regulating valve according to claim 7, characterized in that: A reinforcing sleeve (35) is provided on the outer periphery of the connection portion between the upper rod (30) and the lower rod (31), and a plurality of locking screws (36) are radially threadedly connected to the reinforcing sleeve (35), and some of the locking screws (36) are tightly pressed against the outer circumferential surface of the upper rod (30), while the other part of the locking screws (36) are tightly pressed against the outer circumferential surface of the lower rod (31).

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