Manual multi-stage regulating valve

Abstract

The utility model discloses a hand-operated multi-stage regulating valve, including: valve body, bonnet, valve stem, valve seat and spool, bonnet is provided on the valve body, in the valve body is provided with inlet runner and outlet runner, the valve seat and spool are provided between inlet runner and outlet runner, and the valve stem is provided with the valve seat and spool. The inner end of the valve rod penetrates through the valve cover to be connected with a valve element in the valve body, the valve cage is further arranged, the valve cage is arranged on the periphery of the valve element in a sleeving mode, a plurality of mounting holes are formed in the valve cage in a penetrating mode, and multi-stage spring positioning devices playing a positioning role are arranged in the mounting holes. According to the arrangement, the multi-stage spring positioning device is arranged on the contact face of the valve cage and the valve element, and the limiting grooves are correspondingly formed in the valve element, so that the valve element can be stably stopped at any position in the process that the valve element is adjusted along with the valve rod; and the required opening and closing size is maintained.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a manual multi-stage regulating valve. Background Art

[0002] The regulating valve, also known as the control valve, is the final control element in the field of industrial automation process control. It receives the control signal output by the regulating control unit and uses power operation to change the process parameters such as medium flow, pressure, temperature, and liquid level.

[0003] In the prior art, for use environments with more difficult conditions, mechanical regulating valves that rely on turning a hand wheel to control opening and closing are still used. During use, the hand wheel is manually turned, and there is often a lack of a positioning device. When the regulating valve is adjusted to the required opening and closing position, the opening and closing state of the regulating valve is only determined by its own friction position, and it is easy to be affected by external forces to change the opening and closing degree of the regulating valve. Therefore, there is room for improvement. Summary of the invention

[0004] In view of the above problems, the present application proposes a manual multi-stage regulating valve, which is provided with a multi-stage spring positioning device on the surface where the valve cage contacts the valve core, and a corresponding limit groove is provided on the valve core, so that the valve core can be relatively stably stopped at any position during the adjustment process of the valve stem to maintain the required opening and closing size; the manual multi-stage regulating valve is specifically implemented by the following technical solutions:

[0005] A manual multi-stage regulating valve comprises: a valve body, a valve cover, a valve stem, a valve seat and a valve core, the valve cover is arranged on the valve body, the valve body is provided with an inlet flow channel and an outlet flow channel, the valve seat and the valve core are arranged between the inlet flow channel and the outlet flow channel, the inner end of the valve stem passes through the valve cover and is connected with the valve core in the valve body, and a valve cage is also provided, the valve cage is sleeved on the outer periphery of the valve core, a plurality of mounting holes are penetrated on the valve cage, and a multi-stage spring positioning device for positioning is provided in each of the plurality of mounting holes, and the valve core is correspondingly provided with positioning grooves having the same number as the mounting holes.

[0006] It is further configured that the multi-stage spring positioning device includes a bullet, a spring and a block, and the bullet, spring and block are arranged in the mounting hole from the inside to the outside, and the bullet is slidably arranged at the innermost end of the mounting hole along the extension direction of the mounting hole, and the block is installed at the outer end of the mounting hole through a fastener. Through this configuration, the bullet is movably arranged to realize the positioning function during the movement of the valve core, thereby realizing the basic function.

[0007] It is further configured that a first limiting flange is provided at the inner end of the mounting hole, and the bullet includes a sliding portion and a spherical protrusion, the sliding portion is arranged in the mounting hole, and the sliding portion is limited and cooperated with the first limiting flange, the spherical protrusion is not limited by the first limiting flange, and can extend out of the mounting hole. Through this configuration, the bullet is prevented from escaping from the mounting hole under the action of the spring, and the configuration of the spherical protrusion facilitates movement after positioning.

[0008] It is further configured that the valve core is provided with a through hole for the valve stem to pass through, the valve stem includes a locking portion with a diameter larger than the through hole, and a threaded end portion passing through the through hole, the threaded end portion is provided with a first locking nut and a second locking nut, and the valve stem is connected to the valve core in a manner that the locking portion and the first locking nut and the second locking nut clamp the through hole. Through this configuration, the first locking nut and the second locking nut prevent the nuts from loosening during use, which would cause the valve stem to separate from the valve core, thereby making the overall structure more stable.

[0009] It is further arranged that a plurality of slow-flow holes are arranged on the valve cage, and the valve core is provided with guide holes corresponding to the slow-flow holes, and the slow-flow holes correspond to the guide holes one by one. Through this arrangement, the medium with relatively high pressure is buffered, so as to slow down the flow rate and protect the valve.

[0010] It is further arranged that a first sealing ring is arranged at the mounting position of the valve seat and the valve body. Through this arrangement, the sealing performance between the valve seat and the valve body is enhanced.

[0011] It is further provided that a second sealing ring is provided at the contact position between the valve seat and the valve core. Through this provision, the sealing performance between the valve seat and the valve core when the valve is closed is enhanced.

[0012] The manual multi-stage regulating valve described above is provided with a multi-stage spring positioning device on the contact surface between the valve cage and the valve core, and a corresponding limit groove is provided on the valve core. The bullet head in the multi-stage spring positioning device is clamped in the limit groove, so that the valve core can be adjusted with the valve stem and can be relatively stably paused at any position to maintain the required opening and closing size. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1A front cross-sectional view of a manual multi-stage regulating valve provided in an embodiment of the present application;

[0015] Figure 2 This is an enlarged view of part A of the manual multi-stage regulating valve provided in an embodiment of the present application.

[0016] Among them, the reference numerals in the figure are:

[0017] 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Valve seat; 5. Valve core; 6. Inlet flow channel; 7. Outlet flow channel; 8. Valve cage; 9. Mounting hole; 10. Multi-stage spring positioning device; 11. Positioning groove; 12. Bullet; 13. Spring; 14. Block; 15. First limiting flange; 16. Sliding part; 17. Spherical protrusion; 18. Through hole; 19. Locking part; 20. Threaded end; 21. First locking nut; 22. Second locking nut; 23. Slow flow hole; 24. Guide hole; 25. First sealing ring; 26. Second sealing ring. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] The present application is further described with reference to the accompanying drawings and specific implementation methods:

[0021] Please also read Figure 1 to Figure 2 A manual multi-stage regulating valve comprises: a valve body 1, a valve cover 2, a valve stem 3, a valve seat 4 and a valve core 5, the valve cover 2 is arranged on the valve body 1, an inlet flow channel 6 and an outlet flow channel 7 are arranged in the valve body 1, the valve seat 4 and the valve core 5 are arranged between the inlet flow channel 6 and the outlet flow channel 7, the inner end of the valve stem 3 passes through the valve cover 2 and is connected to the valve core 5 in the valve body 1, and a valve cage 8 is also provided, the valve cage 8 is sleeved on the outer periphery of the valve core 5, a plurality of mounting holes 9 are penetrated on the valve cage 8, and a multi-stage spring positioning device 10 for positioning is arranged in each of the plurality of mounting holes 9, and the valve core 5 is correspondingly provided with positioning grooves 11 having the same number as the mounting holes 9.

[0022] See also Figure 1 and Figure 2In this embodiment, the multi-stage spring positioning device 10 includes a bullet 12, a spring 13 and a block 14, and the bullet 12, the spring 13 and the block 14 are arranged in the mounting hole 9 from the inside to the outside, and the bullet 12 is slidably arranged at the innermost end of the mounting hole 9 along the extension direction of the mounting hole 9, and the block 14 is installed at the outer end of the mounting hole 9 by a fastener. Through this arrangement, the spacing between multiple mounting holes 9 and multiple limiting grooves is equal, so that when the valve core 5 is in the process of changing from the locked state to the fully open state, each bullet 12 and the limiting groove can be adapted to each other. A multi-level positioning effect is achieved during the opening process. The block 14 mainly blocks the outer end of the mounting hole 9 and repairs the outer end surface of the valve cage 8 to prevent wear during installation caused by unevenness. A first limiting flange 15 is provided at the inner end of the mounting hole 9. The bullet 12 includes a sliding portion 16 and a spherical protrusion 17. The sliding portion 16 is provided in the mounting hole 9, and the sliding portion 16 is limited by the first limiting flange 15. The spherical protrusion 17 is not limited by the first limiting flange 15 and can extend out of the mounting hole 9. The setting of the spherical protrusion 17, on the one hand The surface can play a positioning role in the installation groove, and on the other hand, the spherical surface will not cause excessive resistance to hinder the opening and closing action of the valve core 5; the valve core 5 is provided with a through hole 18 for the valve stem 3 to pass through, and the valve stem 3 includes a locking portion 19 with a diameter larger than the through hole 18, and a threaded end 20 passing through the through hole 18, and the threaded end 20 is provided with a first locking nut 21 and a second locking nut 22. The valve stem 3 is connected to the valve core 5 in a manner that the locking portion 19 and the first locking nut 21 and the second locking nut 22 clamp the through hole 18, and the valve stem 3 and the valve core 5 is not fixedly linked, and during operation, the valve stem 3 is linked to the valve core 5 to move up and down to realize the opening, closing and regulation of the valve; a plurality of slow-flow holes 23 are arranged on the valve cage 8, and the valve core 5 is provided with guide holes 24 corresponding to the slow-flow holes 23, and the slow-flow holes 23 correspond to the guide holes 24 one by one; a first sealing ring 25 is arranged at the mounting position of the valve seat 4 and the valve body 1; a second sealing ring 26 is arranged at the contact position between the valve seat 4 and the valve core 5, and the arrangement of the slow-flow holes 23 and the sealing ring is relatively common in the prior art, but it is indispensable, and the technology is relatively mature, so no further elaboration is made here.

[0023] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A manual multi-stage regulating valve, comprising: A valve body (1), a valve cover (2), a valve stem (3), a valve seat (4) and a valve core (5), wherein the valve cover (2) is arranged on the valve body (1), an inlet flow channel (6) and an outlet flow channel (7) are arranged in the valve body (1), the valve seat (4) and the valve core (5) are arranged between the inlet flow channel (6) and the outlet flow channel (7), the inner end of the valve stem (3) passes through the valve cover (2) and is connected to the valve core (5) in the valve body (1), and is characterized in that: a valve cage (8) is also provided, the valve cage (8) is sleeved on the outer periphery of the valve core (5), a plurality of mounting holes (9) are penetrated on the valve cage (8), and a multi-stage spring positioning device (10) for positioning is arranged in each of the plurality of mounting holes (9), and the valve core (5) is correspondingly provided with positioning grooves (11) having the same number as the mounting holes (9).

2. A manual multi-stage regulating valve according to claim 1, characterized in that The multi-stage spring positioning device (10) comprises a bullet (12), a spring (13) and a block (14); the bullet (12), the spring (13) and the block (14) are arranged in the mounting hole (9) from the inside to the outside, and the bullet (12) is slidably arranged at the innermost end of the mounting hole (9) along the extension direction of the mounting hole (9); and the block (14) is mounted on the outer end of the mounting hole (9) by a fastener.

3. A manual multi-stage regulating valve according to claim 2, characterized in that The inner end of the mounting hole (9) is provided with a first limiting flange (15); the bullet head (12) comprises a sliding portion (16) and a spherical protrusion (17); the sliding portion (16) is provided in the mounting hole (9), and the sliding portion (16) is limitedly matched with the first limiting flange (15); the spherical protrusion (17) is not limited by the first limiting flange (15) and can extend out of the mounting hole (9).

4. A manual multi-stage regulating valve according to claim 1, characterized in that The valve core (5) is provided with a through hole (18) for the valve stem (3) to pass through, the valve stem (3) includes a locking portion (19) having a diameter larger than the through hole (18), and a threaded end portion (20) passing through the through hole (18), the threaded end portion (20) being provided with a first locking nut (21) and a second locking nut (22), the valve stem (3) being connected to the valve core (5) in a manner that the locking portion (19) and the first locking nut (21) and the second locking nut (22) clamp the through hole (18).

5. A manual multi-stage regulating valve according to claim 1, characterized in that The valve cage (8) is provided with a plurality of slow-flow holes (23), and the valve core (5) is provided with guide holes (24) corresponding to the slow-flow holes (23), and the slow-flow holes (23) correspond to the guide holes (24) one by one.

6. A manual multi-stage regulating valve according to claim 1, characterized in that A first sealing ring (25) is provided at the mounting position between the valve seat (4) and the valve body (1).

7. A manual multi-stage regulating valve according to claim 1, characterized in that A second sealing ring (26) is provided at the contact position between the valve seat (4) and the valve core (5).

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