Micro-adjustment valve assembly

Abstract

The utility model relates to the technical field of adjusting valves, and provides a micro-adjusting valve assembly which comprises a valve seat, a first adjusting sleeve and an adjusting rod, the valve seat is fixedly arranged in an external valve body, the first adjusting sleeve is arranged in the valve seat in a vertically sliding mode, and the adjusting rod is detachably connected to the first adjusting sleeve. At least one first opening is formed in the side wall of the valve seat, the valve further comprises a second adjusting sleeve, the second adjusting sleeve is arranged on the lower surface of the first adjusting sleeve, an inner ring body is arranged on the inner wall of the lower end portion of the valve seat in an inward protruding mode, and a sealing piece is arranged on the first adjusting sleeve and / or the second adjusting sleeve. The sealing piece abuts against the inner ring body, at least one second opening is formed in the side wall of the second adjusting sleeve, the opening of the second opening is gradually increased from top to bottom, and the lower end of the adjusting rod is detachably connected to the second adjusting sleeve.

Description

Technical Field

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

[0002] In industrial automation control systems, control valves, as an important control element, are widely used in the regulation and control systems of various fluids. The performance and accuracy of the control valve directly affect the stability and reliability of the entire control system. Therefore, for specific application scenarios, choosing suitable control valves and their components is crucial to achieve precise control.

[0003] Chinese patent 202323009116.5 discloses an electric cage-type regulating valve, including a valve body, a valve seat installed in the middle of the valve body, a valve core assembly arranged inside the valve seat, the cooperation of the valve seat and the valve core assembly can accurately control the opening and closing of the valve, a valve cover is installed on the top of the valve body 1, an actuator is installed on the top of the valve cover, the output shaft of the actuator passes through the valve cover and is connected to the valve core assembly, the actuator can directly drive the valve core assembly, a first metal winding pad is installed between the bottom of the valve seat and the inner wall of the valve body, a second metal winding pad is installed on the top extension of the valve seat near the valve body, and a third metal winding pad is installed on the top extension of the valve seat 3 near the valve cover. As the valve core assembly moves upward, the opening on the valve seat is released, and as it slides further upward, the water flow area of ​​the opening on the valve seat is gradually increased to control the fluid flow rate. On the contrary, the valve core assembly slides downward and gradually reduces the fluid flow area of ​​the opening until the valve is completely closed. The inlet and outlet ends of the valve are connected or blocked by the upward and downward sliding of the valve core assembly.

[0004] The existing control valves only adjust the opening area on the valve seat to adjust the fluid flow. In the precision control system of specific application scenarios, it still cannot meet the micro-supply accuracy requirements. Therefore, in order to improve the micro-adjustment accuracy of the control valve, this case is generated. Utility Model Content

[0005] Therefore, in view of the above problems, the utility model proposes a micro-adjusting valve assembly.

[0006] To solve the above technical problems, the solution adopted by the utility model is: a micro-adjustment valve assembly, including a valve seat, a first adjusting sleeve, and an adjusting rod. The valve seat is fixedly arranged in an external valve body, the first adjusting sleeve slides up and down in the valve seat, the adjusting rod is detachably connected to the first adjusting sleeve, at least one first opening is opened on the side wall of the valve seat, and also includes a second adjusting sleeve, the second adjusting sleeve is arranged on the lower surface of the first adjusting sleeve, the inner wall of the lower end portion of the valve seat is protruded inwardly and an inner ring body is arranged, the inner side wall of the inner ring body is fitted with the outer side wall of the second adjusting sleeve, a sealing member is arranged on the first adjusting sleeve and / or the second adjusting sleeve, the sealing member is tightly pressed against the inner ring body, at least one second opening is opened on the side wall of the second adjusting sleeve, the opening of the second opening gradually increases from top to bottom, and the lower end of the adjusting rod is detachably connected to the second adjusting sleeve.

[0007] A further improvement is that an arc-shaped guide surface is provided on the inner edge of the upper end portion of the inner ring body.

[0008] A further improvement is that a buffer groove is provided on the outer edge of the upper end portion of the inner ring body.

[0009] Further improvement is: the first adjustment sleeve is provided with a first installation groove from the lower surface upward, a sealing gasket is arranged in the first installation groove, the thickness of the sealing gasket is greater than the groove depth of the first installation groove, the second adjustment sleeve is arranged on the lower surface of the sealing gasket, the inner diameter of the sealing gasket is smaller than the outer diameter of the second adjustment sleeve, the outer diameter of the sealing gasket is larger than the outer diameter of the second adjustment sleeve, and the lower surface of the sealing gasket is tightly pressed against the upper surface of the inner ring body.

[0010] A further improvement is that: the sealing pad is provided with a second installation groove extending upward from the lower surface, and the upper surface of the second adjustment sleeve is arranged in the second installation groove.

[0011] A further improvement is that a guide cylinder is integrally provided downwardly at the lower end of the valve seat, the inner diameter of the guide cylinder is smaller than the inner diameter of the inner ring body, and the outer diameter of the guide cylinder is smaller than the outer diameter of the valve seat.

[0012] A further improvement is that: the first adjustment sleeve is provided with a first installation groove from the lower surface upwards, a sealing gasket is arranged in the first installation groove, the inner diameter of the sealing gasket is larger than the outer diameter of the second adjustment sleeve, and the lower surface of the sealing gasket is tightly pressed against the upper surface of the inner ring body.

[0013] A further improvement is that a first installation groove is opened inwardly along the circumferential direction at the top of the outer wall of the second adjustment sleeve, a sealing gasket is sleeved in the first installation groove, the side wall of the sealing gasket exceeds the first installation groove, and the side wall of the sealing gasket is tightly pressed against the inner wall of the inner ring body.

[0014] A further improvement is that the upper surface of the second adjustment sleeve is integrally connected to the lower surface of the first adjustment sleeve.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] In this case, the second adjusting sleeve is arranged at the lower end of the first adjusting sleeve, and the opening of the second opening opened on the side wall of the second adjusting sleeve gradually increases from top to bottom. The inner wall of the inner ring body and the outer wall of the second adjusting sleeve are always in contact with each other, so that during the valve adjustment process, the fluid can only flow from the second opening to the first opening. At the same time, the sliding stability of the second adjusting sleeve and the first adjusting sleeve is improved, and the vibration of the valve under the impact of the fluid is reduced.

[0017] As the first adjusting sleeve slides up, the fluid passage areas of the second opening and the first opening gradually increase; as the first adjusting sleeve slides down, the fluid passage areas of the second opening and the first opening gradually decrease; so as to achieve the minimum value of the flow rate flowing to the first opening further reduced through the second opening on the basis of the flow rate regulation of the first opening, thereby increasing the micro-control range of the flow rate and improving the micro-control accuracy of the regulating valve.

[0018] A further beneficial effect is that the sealing gasket is clamped and embedded between the first adjusting sleeve and the second adjusting sleeve, so as to prevent the sealing gasket from falling off under the impact of the fluid, thereby improving the safety of the rear of the regulating valve. Moreover, the sealing gasket is fixed by the mutual clamping of the first adjusting sleeve and the second adjusting sleeve, so that no glue is applied, thereby improving the versatility of the valve core assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a micro-adjusting valve assembly used in a control valve according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of a micro-adjusting valve assembly according to an embodiment of the present utility model.

[0021] Figure 3 It is a schematic diagram of the internal structure of a micro-adjusting valve assembly according to an embodiment of the present utility model.

[0022] Figure 4 This is a schematic diagram of the fluid path of a micro-adjusting valve assembly according to Embodiment 1 of the present utility model.

[0023] Figure 5 yes Figure 4 A magnified view of the local structure at point A.

[0024] Figure 6 It is a schematic diagram of the internal structure of a micro-adjusting valve assembly according to the second embodiment of the utility model.

[0025] Figure 7It is a schematic diagram of the internal structure of a micro-adjusting valve assembly according to the third embodiment of the utility model. DETAILED DESCRIPTION

[0026] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments. Embodiment 1:

[0027] refer to Figures 1 to 5 The embodiment of the utility model discloses a micro-adjustment valve assembly, including a valve seat 10, a first adjustment sleeve 11, an adjustment rod 12, and a second adjustment sleeve 13. The valve seat 10 is fixedly arranged in the external valve body. The outer wall of the first adjustment sleeve 11 fits the inner wall of the valve seat 10 and slides up and down in the valve seat 10. The adjustment rod 12 is disassembled and connected to the first adjustment sleeve 11 through a nut. Four first openings 14 are opened on the side wall of the valve seat 10. The opening of each opening 14 gradually decreases from top to bottom. The second adjustment sleeve 13 is arranged on the lower surface of the first adjustment sleeve 11. The inner wall of the lower end of the valve seat 10 is integrally convex inward. The valve seat 10 is provided with an inner ring body 15 for preventing the fluid from flowing to the first opening 14 along the gap between the second adjustment sleeve 13 and the valve seat 10. The inner side wall of the inner ring body 15 is in contact with the outer side wall of the second adjustment sleeve 13. A seal for preventing the fluid from flowing to the first opening 14 is provided between the first adjustment sleeve 11 and the second adjustment sleeve 13. The seal is in contact with the inner ring body 15. Four second openings 16 for controlling the flow to the first opening 14 are provided on the side wall of the second adjustment sleeve 13. The opening of the second opening 16 gradually increases from top to bottom. The nut at the lower end of the adjustment rod 12 is detachably connected to the second adjustment sleeve 13. The lower end of the valve seat 10 is provided with a guide cylinder 17 for fitting the internal opening of the external valve body to increase the assembly stability of the valve core assembly. The inner diameter of the guide cylinder 17 is smaller than the inner diameter of the inner ring body 15, and the outer diameter of the guide cylinder 17 is smaller than the outer diameter of the valve seat 10.

[0028] The inner edge of the upper end of the inner ring body 15 is provided with an arc-shaped guide surface 18 for smoothly guiding the fluid to the first opening 14 to avoid the fluid colliding with the valve seat 10 and causing valve vibration. The outer edge of the upper end of the inner ring body 15 is provided with a buffer groove 19 opened along the upper surface to buffer the impact force of the fluid when the second opening 16 is initially opened.

[0029] The first adjustment sleeve 11 has a first mounting groove 20 extending upward from the lower surface, a sealing gasket 21 is arranged in the first mounting groove 20, the thickness of the sealing gasket 21 is greater than the groove depth of the first mounting groove 20, the second adjustment sleeve 13 is arranged on the lower surface of the sealing gasket 21, the inner diameter of the sealing gasket 21 is smaller than the outer diameter of the second adjustment sleeve 13, the outer diameter of the sealing gasket 21 is greater than the outer diameter of the second adjustment sleeve 13, and the lower surface of the sealing gasket 21 is tightly pressed against the upper surface of the inner ring body 15. The sealing gasket 21 has a second mounting groove 22 extending upward from the lower surface, and the upper surface of the second adjustment sleeve 13 is arranged in the second mounting groove 22. Embodiment 2:

[0030] refer to Figure 6 The embodiment of the utility model discloses a micro-adjustment valve assembly, including a valve seat 10, a first adjustment sleeve 11, an adjustment rod 12, and a second adjustment sleeve 13. The valve seat 10 is fixedly arranged in the external valve body, the first adjustment sleeve 11 is arranged in the valve seat 10 for sliding upward and downward movement, the adjustment rod 12 is detachably connected to the first adjustment sleeve 11, at least one first opening 14 is opened on the side wall of the valve seat 10, the second adjustment sleeve 13 is arranged on the lower surface of the first adjustment sleeve 11, and the inner wall of the lower end of the valve seat 10 is integrally protruded inwardly and is provided with a barrier for blocking the fluid. The inner ring body 15 flows along the gap between the second adjustment sleeve 13 and the valve seat 10 to the first opening 14, the inner side wall of the inner ring body 15 is in contact with the outer side wall of the second adjustment sleeve 13, the first adjustment sleeve 11 is provided with a seal for preventing the fluid from flowing to the first opening 14, the seal is in contact with the inner ring body 15, the side wall of the second adjustment sleeve 13 is provided with at least one second opening 16 for controlling the flow to the first opening 14, the opening of the second opening 16 gradually increases from top to bottom, and the lower end of the adjustment rod 12 is detachably connected to the second adjustment sleeve 13. The lower end of the valve seat 10 is integrally provided with a guide cylinder 17 downwardly for contacting the internal opening of the external valve body to increase the assembly stability of the valve core assembly, the inner diameter of the guide cylinder 17 is smaller than the inner diameter of the inner ring body 15, and the outer diameter of the guide cylinder 17 is smaller than the outer diameter of the valve seat 10.

[0031] The inner edge of the upper end of the inner ring body 15 is provided with an arc-shaped guide surface for smoothly guiding the fluid to the first opening 14 to avoid the fluid colliding with the valve seat 10 and causing valve vibration. The outer edge of the upper end of the inner ring body 15 is provided with a buffer groove opened along the upper surface to buffer the impact force of the fluid when the second opening 16 is initially opened.

[0032] The first adjusting sleeve 11 has a first installation groove 20' formed upward from the lower surface, and a sealing gasket 21' is glued in the first installation groove 20'. The inner diameter of the sealing gasket 21' is larger than the outer diameter of the second adjusting sleeve 13, and the lower surface of the sealing gasket 21' is tightly pressed against the upper surface of the inner ring body 15. The upper surface of the second adjusting sleeve 13 is integrally connected with the lower surface of the first adjusting sleeve 11. Embodiment three:

[0033] refer to Figure 7 The embodiment of the utility model discloses a micro-adjustment valve assembly, including a valve seat 10, a first adjustment sleeve 11, an adjustment rod 12, and a second adjustment sleeve 13. The valve seat 10 is fixedly arranged in the external valve body, the first adjustment sleeve 11 is arranged in the valve seat 10 for sliding upward and downward movement, the adjustment rod 12 is detachably connected to the first adjustment sleeve 11, at least one first opening 14 is opened on the side wall of the valve seat 10, the second adjustment sleeve 13 is arranged on the lower surface of the first adjustment sleeve 11, and the inner wall of the lower end of the valve seat 10 is integrally protruded inwardly and is provided with a barrier for blocking the fluid. The inner ring body 15 flows along the gap between the second adjustment sleeve 13 and the valve seat 10 to the first opening 14, the inner side wall of the inner ring body 15 is in contact with the outer side wall of the second adjustment sleeve 13, the second adjustment sleeve 13 is provided with a seal for preventing the fluid from flowing to the first opening 14, the seal is in contact with the inner ring body 15, the side wall of the second adjustment sleeve 13 is provided with at least one second opening 16 for controlling the flow to the first opening 14, the opening of the second opening 16 gradually increases from top to bottom, and the lower end of the adjustment rod 12 is detachably connected to the second adjustment sleeve 13. The lower end of the valve seat 10 is integrally provided with a guide cylinder 17 downwardly for contacting the internal opening of the external valve body to increase the assembly stability of the valve core assembly, the inner diameter of the guide cylinder 17 is smaller than the inner diameter of the inner ring body 15, and the outer diameter of the guide cylinder 17 is smaller than the outer diameter of the valve seat 10.

[0034] The inner edge of the upper end of the inner ring body 15 is provided with an arc-shaped guide surface for smoothly guiding the fluid to the first opening 14 to avoid the fluid colliding with the valve seat 10 and causing valve vibration. The outer edge of the upper end of the inner ring body 15 is provided with a buffer groove opened along the upper surface to buffer the impact force of the fluid when the second opening 16 is initially opened.

[0035] A first mounting groove 20" is formed inwardly along the circumferential direction at the top of the outer wall of the second adjustment sleeve 13. A sealing gasket 21" is glued into the first mounting groove. The side wall of the sealing gasket extends beyond the first mounting groove, and the side wall of the sealing gasket is tightly pressed against the inner wall of the inner ring body 15. The upper surface of the second adjustment sleeve 13 is integrally connected to the lower surface of the first adjustment sleeve 11.

[0036] A method for using a micro-adjustment valve assembly: the actuator outside the valve drives the adjustment rod 12 to drive the first adjustment sleeve 11 and the second adjustment sleeve 13 to slide up and down synchronously, so as to realize the adjustment and control of the valve flow. The outer wall of the first adjustment sleeve 11 and the inner wall of the valve seat 10 slide in close contact, and the outer wall of the second adjustment sleeve 13 and the inner wall of the inner ring body 15 slide in close contact. When the first adjustment sleeve 11 and the second adjustment sleeve 13 slide up synchronously, the fluid passing area of ​​the second opening 16 and the first opening 14 gradually increases. When the first adjustment sleeve 11 and the second adjustment sleeve 13 slide down synchronously, the fluid passing area of ​​the second opening 16 and the first opening 14 gradually decreases. Through the dual adjustment of the first adjustment sleeve 11 and the second adjustment sleeve 13, the flow value at the initial opening is reduced, the adjustment range of the flow is increased, and the micro-adjustment accuracy of the flow is improved.

[0037] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A micro-adjustment valve assembly, comprising a valve seat, a first adjustment sleeve, and an adjustment rod, wherein the valve seat is fixedly arranged in an external valve body, the first adjustment sleeve is slidably arranged in the valve seat, the adjustment rod is detachably connected to the first adjustment sleeve, and at least one first opening is opened on the side wall of the valve seat, characterized in that: It also includes a second adjusting sleeve, which is arranged on the lower surface of the first adjusting sleeve, and the inner wall of the lower end of the valve seat is protruding inward to provide an inner ring body, and the inner wall of the inner ring body is in contact with the outer wall of the second adjusting sleeve. The first adjusting sleeve and / or the second adjusting sleeve are provided with a sealing member, and the sealing member is tightly pressed against the inner ring body. At least one second opening is opened on the side wall of the second adjusting sleeve, and the opening of the second opening gradually increases from top to bottom. The lower end of the adjusting rod is detachably connected to the second adjusting sleeve.

2. A micro-adjusting valve assembly according to claim 1, characterized in that: An arc-shaped guide surface is arranged on the inner edge of the upper end portion of the inner ring body.

3. A micro-adjusting valve assembly according to claim 1, characterized in that: A buffer groove is arranged on the outer edge of the upper end portion of the inner ring body.

4. A micro-adjusting valve assembly according to claim 1, 2 or 3, characterized in that: The first adjusting sleeve is provided with a first mounting groove extending upward from the lower surface, a sealing gasket is arranged in the first mounting groove, the thickness of the sealing gasket is greater than the groove depth of the first mounting groove, the second adjusting sleeve is arranged on the lower surface of the sealing gasket, the inner diameter of the sealing gasket is smaller than the outer diameter of the second adjusting sleeve, the outer diameter of the sealing gasket is larger than the outer diameter of the second adjusting sleeve, and the lower surface of the sealing gasket is tightly pressed against the upper surface of the inner ring body.

5. A micro-adjusting valve assembly according to claim 4, characterized in that: The sealing pad is provided with a second mounting groove extending upward from the lower surface, and the upper surface of the second adjustment sleeve is arranged in the second mounting groove.

6. A micro-adjusting valve assembly according to claim 4, characterized in that: A guide cylinder is integrally provided downwardly at the lower end of the valve seat, the inner diameter of the guide cylinder is smaller than the inner diameter of the inner ring body, and the outer diameter of the guide cylinder is smaller than the outer diameter of the valve seat.

7. A micro-adjusting valve assembly according to claim 1, 2 or 3, characterized in that: The first adjusting sleeve is provided with a first installation groove extending upward from the lower surface, a sealing gasket is arranged in the first installation groove, the inner diameter of the sealing gasket is larger than the outer diameter of the second adjusting sleeve, and the lower surface of the sealing gasket is tightly pressed against the upper surface of the inner ring body.

8. A micro-adjusting valve assembly according to claim 1, 2 or 3, characterized in that: A first installation groove is opened inwardly along the circumferential direction at the top of the outer wall of the second adjustment sleeve, a sealing gasket is sleeved in the first installation groove, the side wall of the sealing gasket exceeds the first installation groove, and the side wall of the sealing gasket is tightly pressed against the inner wall of the inner ring body.

9. A micro-adjusting valve assembly according to claim 7, characterized in that: The upper surface of the second adjustment sleeve is integrally connected to the lower surface of the first adjustment sleeve.

10. A micro-adjusting valve assembly according to claim 8, characterized in that: The upper surface of the second adjustment sleeve is integrally connected to the lower surface of the first adjustment sleeve.

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