Balance valve

Abstract

The balance valve comprises a valve body and a throttling assembly, an inlet, an outlet and a mounting hole formed between the inlet and the outlet are formed in the valve body, the throttling assembly is arranged in the mounting hole and used for adjusting the flow of the outlet, the throttling assembly comprises a second throttling cylinder and a first throttling cylinder, and the second throttling cylinder is arranged in the mounting hole and used for adjusting the flow of the outlet. The first throttling cylinder is rotatably arranged in the mounting hole, the second throttling cylinder is arranged in the mounting hole and can move relative to the first throttling cylinder in the axis direction of the mounting hole, a window is formed in the side wall of the first throttling cylinder, and the window is communicated with the inlet and the outlet. The second throttling cylinder comprises a blocking part corresponding to the window, and the rotation of the first throttling cylinder and the axial movement of the second throttling cylinder relative to the first throttling cylinder can adjust the area of the relative part of the blocking part and the window. The method is convenient to debug.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a balancing valve. Background Technology

[0002] The balancing valve is a key control component of fluid systems (mainly covering hydraulic systems and HVAC systems). Its core function is to regulate and stabilize the flow or pressure of each branch in the system so that each branch reaches the balance required by the design.

[0003] The balancing valve in the related technology has a complex adjustment structure, and the fluid is easily disturbed during adjustment, making debugging inconvenient. Summary of the Invention

[0004] This invention aims to address, to a certain extent, one of the technical problems in related technologies. To this end, this invention provides a balancing valve that offers advantages such as ease of adjustment and reduced disturbance to the fluid.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a balancing valve, comprising a valve body and a throttling component, wherein the valve body has an inlet, an outlet, and a mounting hole disposed between the inlet and the outlet, and the throttling component is disposed within the mounting hole and is used to regulate the flow rate at the outlet. The throttling assembly includes a second throttling cylinder and a first throttling cylinder. The first throttling cylinder is rotatably disposed within the mounting hole. The second throttling cylinder is disposed within the mounting hole and is movable relative to the first throttling cylinder along the axial direction of the mounting hole. A window is formed on the side wall of the first throttling cylinder, and the window communicates with the inlet and outlet respectively. The second throttling cylinder includes a blocking portion corresponding to the window. The rotation of the first throttling cylinder and the axial movement of the second throttling cylinder relative to the first throttling cylinder can adjust the area of ​​the blocking portion and the relative portion of the window.

[0006] In this technical solution, the first and second throttling cylinders can rotate relative to each other and move relative to each other along the axial direction. Through the relative movement in two dimensions, more possibilities for opening adjustment can be achieved, thereby making the flow adjustment range of the balance valve wider and adapting to more application scenarios. Moreover, the relative movement of the two components in two dimensions increases the adjustment path of flow adjustment during the debugging process, making adjustment more convenient.

[0007] Furthermore, the first throttle cylinder is limited and fixed along the axial direction of the mounting hole, and the second throttle cylinder is slidably disposed in the mounting hole along the axial direction of the mounting hole. The first throttle cylinder and the second throttle cylinder are coaxial and fitted together.

[0008] Furthermore, a first annular platform is formed on the inner wall of the mounting hole, and the balance valve also includes a valve seat, which is disposed in the mounting hole and forms a gap with the first annular platform. A portion of the first throttling cylinder is rotatably disposed between the valve seat and the first annular platform, and the valve seat and the first annular platform together define the axial position of the first throttling cylinder.

[0009] Furthermore, the first throttling cylinder includes a cylindrical body, a connecting part, and a mating part. The connecting part and the mating part are respectively disposed at opposite ends of the cylindrical body. The connecting part protrudes from the outer side wall of the cylindrical body and is rotatably engaged between the valve seat and the first annular platform. The window is formed on the side wall of the cylindrical body, and a notch is formed on the inner side wall of the mounting hole. An opening is formed at one end of the connecting part of the cylindrical body. The opening is opposite to the first end of the mounting hole and communicates with the window and the inlet. The window is opposite to the notch. The mating part is used for transmission engagement with the valve stem in the throttling assembly.

[0010] Furthermore, the throttling assembly also includes a valve stem, a rotary drive unit, and a linear drive unit. The valve stem is rotatably and slidably disposed within the mounting hole, and the axial direction of the valve stem is consistent with the axial direction of the mounting hole. The second throttling cylinder is rotatably sleeved and connected to the valve stem, and the second throttling cylinder and the valve stem are fixed relative to each other along the axial direction. One end of the valve stem is inserted into and circumferentially limited by the first throttling cylinder. The rotary drive unit is used to drive the valve stem to rotate, and the linear drive unit is used to drive the valve stem to move along the axial direction.

[0011] Furthermore, one end of the first throttling cylinder is formed with a central hole and at least one flow passage. The central hole is located at the center of the first throttling cylinder and is inserted into and circumferentially limited by the valve stem. The flow passage is arranged around the central hole. A gap is formed between the inner wall of the second throttling cylinder and the outer wall of the valve stem. The gap between the flow passage, the valve stem, and the second throttling cylinder is interconnected and used to guide the fluid flowing in from the inlet to the top side of the diaphragm.

[0012] Furthermore, the balance valve includes a pressure cap, which is detachably connected to the valve body. The inner cavity of the pressure cap and the mounting hole are interconnected. The rotary drive unit is disposed in the inner cavity of the pressure cap and includes a retainer and a knob. The retainer is detachably engaged with the pressure cap, and the knob is rotatably disposed in the retainer and connected to the valve stem.

[0013] Furthermore, the rotary drive unit also includes an adjusting cylinder, with threaded connection portions and drive engagement portions formed at both ends of the adjusting cylinder. An external thread is formed on the outer side of the pressure cap. The threaded connection portion is used to connect with the external thread, and the drive engagement portion is used to selectively engage with the knob and circumferentially limit the engagement to drive the rotation of the knob.

[0014] Furthermore, the balancing valve also includes a balancing assembly, which includes a diaphragm, a flow stabilizing sleeve, and an elastic element. The flow stabilizing sleeve is fitted onto the outside of the second and first throttling cylinders. The diaphragm is disposed on the top side of the flow stabilizing sleeve, and the elastic element is disposed on the bottom side of the flow stabilizing sleeve. Fluid flowing in from the inlet can pass through the first and second throttling cylinders and flow to the top side of the diaphragm. The diaphragm and the elastic element are used to dynamically adjust the opening of the window.

[0015] Furthermore, the balancing valve also includes a bracket, which is disposed in the mounting hole. The bracket is sleeved on the outside of the first and second throttling cylinders and disposed on the inside of the flow stabilizing sleeve. The top side of the bracket is higher than the top side of the first throttling cylinder. One end of the elastic element is connected to the inner top wall of the flow stabilizing sleeve, and the other end is connected to the top side of the bracket.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but this is not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a cross-sectional structural diagram of the balance valve according to one embodiment of the present invention (schematic diagram of the main flow path). Figure 2 This is a cross-sectional structural diagram of a balance valve according to one embodiment of the present invention (schematic diagram of balance flow path). Figure 3 This is an external view of one embodiment of the present invention; Figure 4 This is a schematic diagram of the assembly state of the first and second throttling cylinders according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the first and second throttling cylinder structures according to one embodiment of the present invention; Figure 6 This is a structural diagram of the internal structure of the balance valve according to one embodiment of the present invention.

[0018] in, 10. Valve body; 11. Inlet; 12. Outlet; 13. Mounting hole; 131. First annular platform; 20. Throttling assembly; 21. First throttling cylinder; 211. Cylinder body; 212. Connecting part; 213. Fitting part; 214. Window; 215. Center hole; 216. Flow hole; 22. Second throttle tube; 221. Blocking section; 23. Valve stem; 24. Knob; 25. Adjusting cylinder; 26. Valve core sleeve; 27. Card seat; 31. Gland; 32. Valve seat; 40. Balancing component; 41. Diaphragm; 42. Flow stabilizer sleeve; 43. Elastic element; 44. Bracket; 441. Bottom support; 442. Top support; 443. Connecting rod; 51. Pressure detection component. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0020] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this invention. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0021] See appendix Figures 1 to 6 One embodiment of the present invention discloses a balancing valve, which includes a valve body 10 and a throttling assembly 20. Specifically, the valve body 10 has an inlet 11, an outlet 12, and a mounting hole 13 disposed between the inlet 11 and the outlet 12. The throttling assembly 20 is disposed within the mounting hole 13 and its function is to regulate the flow rate at the outlet 12. The throttling assembly 20 consists of a first throttling cylinder 21 and a second throttling cylinder 22. The first throttling cylinder 21 is rotatably disposed within the mounting hole 13, and the second throttling cylinder 22 is also disposed within the mounting hole 13 and is movable relative to the first throttling cylinder 21 along the axial direction of the mounting hole 13. A window 214 is formed on the side wall of the first throttling cylinder 21, communicating with both the inlet 11 and the outlet 12. The second throttling cylinder 22 includes a blocking portion 221 corresponding to the window 214. The rotation of the first throttling cylinder 21 and the axial movement of the second throttling cylinder 22 relative to the first throttling cylinder 21 can adjust the area of ​​the opposing portions of the blocking portion 221 and the window 214.

[0022] The balancing valve in this embodiment is generally used in hydraulic systems and HVAC systems to balance the flow or pressure of each branch.

[0023] Before use, the opening of the balancing valve in this embodiment can be pre-adjusted according to the flow path requirements via the throttling component 20. Specifically, the throttling component 20 in this embodiment includes a first throttling cylinder 21 and a second throttling cylinder 22. A window 214 is formed on the first throttling cylinder 21. In this embodiment, the flow rate in the flow path is adjusted by controlling the flow rate by adjusting the opening size of the window 214. The second throttling cylinder 22 includes a blocking part 221 corresponding to the window 214, as shown in the attached figure. Figure 4 , 5 As shown, in this embodiment, the window 214 is an arc-shaped window 214 opened on the side wall of the first throttling cylinder 21. The corresponding blocking part 221 can be set as an arc-shaped baffle structure corresponding to the window 214. In use, the relative movement (including relative rotation and relative linear movement) of the first throttling cylinder 21 and the second throttling cylinder 22 can change the blocking area of ​​the blocking part 221 on the window 214, thereby changing the opening size of the window 214 and thus realizing the regulation of the flow rate.

[0024] Compared to the flow rate adjustment method in related technologies, which adjusts the flow rate by the relative movement between the throttling component and the valve body 10, the flow rate adjustment in this embodiment is achieved by the first throttling cylinder 21 and the second throttling cylinder 22, eliminating the valve body 10 from participating in the flow rate adjustment. This helps to improve the adjustment accuracy (during processing, the accuracy of the first throttling cylinder 21 and the second throttling cylinder 22 is easier to control than the accuracy of the opening inside the valve body 10).

[0025] Furthermore, controlling the opening of window 214 by using the first throttle tube 21 and the second throttle tube 22 also facilitates the replacement of the first throttle tube 21 and the second throttle tube 22 after long-term use, thus better maintaining the accuracy and convenience of flow regulation.

[0026] In this embodiment, the first throttling cylinder 21 can be configured to be positioned in the axial direction of the mounting hole 13, or it can be configured to slide along the axial direction of the mounting hole 13, as long as the first throttling cylinder 21 and the second throttling cylinder 22 can move relative to each other along the axial direction.

[0027] In this embodiment, the opening of window 214 can be adjusted by rotating the first throttle tube 21 to change the length of the opening of window 214 in the circumferential direction; or by moving the first throttle tube 21 and the second throttle tube 22 axially relative to each other to change the width of window 214 in the axial direction.

[0028] In actual use, theoretically, the blocking part 221 and the window 214 can be in a completely misaligned state (including axial and circumferential directions), at which time the opening of the window 214 is at its maximum; in addition, the blocking part 221 can also completely close the window 214, at which time the balance valve is in the closed state.

[0029] In this embodiment, the balancing valve further includes a balancing assembly 40 for balancing pressure. The balancing assembly 40 includes a diaphragm 41, a flow-stabilizing sleeve 42, and an elastic element 43. The flow-stabilizing sleeve 42 is fitted onto the outside of the second throttling cylinder 22 and the first throttling cylinder 21. The diaphragm 41 is disposed on the top side of the flow-stabilizing sleeve 42, and the elastic element 43 is disposed on the bottom side of the flow-stabilizing sleeve 42. Fluid flowing in from the inlet 11 can pass through the first throttling cylinder 21 and the second throttling cylinder 22, flowing to the top side of the diaphragm 41. The diaphragm 41 and the elastic element 43 are used to dynamically regulate the flow rate.

[0030] In this embodiment, the balancing component 40 is used to dynamically balance the fluid flow rate after the preset flow rate adjustment of the balancing valve is completed. Specifically, the adjustment is achieved through the combined action of the diaphragm 41 and the elastic element 43. See Appendix. Figure 1 , 2 6. When the fluid flow rate is stable, the pressure above the diaphragm 41 and the pressure of the elastic element 43 are in equilibrium, and the axial position of the flow stabilizing sleeve 42 remains essentially unchanged. When the fluid pressure increases, the flow rate increases accordingly. The balancing component 40 is used to reduce the flow rate. Specifically, when a higher pressure fluid acts on the top side of the diaphragm 41, it will cause the diaphragm 41 and the flow stabilizing sleeve 42 to move downward together (the elastic element 43 is compressed). The downward movement of the flow stabilizing sleeve 42 reduces the cross-sectional area of ​​its lower end relative to the window 214, thereby reducing the flow rate and stabilizing the flow rate. When the fluid pressure decreases, the elastic element 43 will push the flow stabilizing sleeve 42 upward, increasing the cross-sectional area through which the fluid flows at its lower end, thereby increasing the flow rate. It can be seen that the balancing component 40 can dynamically adjust the flow rate and ensure the stability of the flow rate when the flow path pressure is unstable.

[0031] As one embodiment of the present invention, see Appendix Figure 1 , 2The first throttle cylinder 21 is limited and fixed along the axial direction of the mounting hole 13, and the second throttle cylinder 22 is slidably disposed in the mounting hole 13 along the axial direction of the mounting hole 13. The first throttle cylinder 21 and the second throttle cylinder 22 are coaxial and fitted together.

[0032] In this embodiment, the axial position of the first throttling cylinder 21 is fixed, meaning that the first throttling cylinder 21 can only rotate and cannot slide. At this time, the relative movement of the first throttling cylinder 21 and the second throttling cylinder 22 along the axial direction is achieved by the sliding of the second throttling cylinder 22.

[0033] In this embodiment, the first throttling cylinder 21 and the second throttling cylinder 22 are coaxially fitted together. In actual installation, there are two situations: the second throttling cylinder 22 can be fitted over the first throttling cylinder 21, or the first throttling cylinder 21 can be fitted over the second throttling cylinder 22.

[0034] As one embodiment of the present invention, see Appendix Figure 1 A first annular platform 131 is formed on the inner wall of the mounting hole 13. The balance valve also includes a valve seat 32, which is disposed in the mounting hole 13 and forms a gap (the gap is formed as a limiting groove) between it and the first annular platform 131. A portion of the first throttle cylinder 21 is rotatably disposed between the valve seat 32 and the first annular platform 131. The valve seat 32 and the first annular platform 131 together define the axial position of the first throttle cylinder 21.

[0035] The first throttling cylinder 21 includes a cylinder body 211, a connecting part 212, and a mating part 213. The connecting part 212 and the mating part 213 are respectively located at opposite ends of the cylinder body 211. The connecting part 212 protrudes from the outer wall of the cylinder body 211 and is rotatably engaged within a limiting groove 132. A window 214 is formed on the side wall of the cylinder body 211, and an opening is formed at one end of the connecting part 212. The mating part 213 is used for transmission engagement with the valve stem 23 in the throttling assembly 20.

[0036] In this embodiment, the limiting groove 132 is formed by the limiting step and the valve seat 32. Specifically, a first annular platform and a second annular platform are formed on the inner wall of the mounting hole 13 at axial intervals. One end of the valve seat 32 abuts against the second annular platform and together with the first annular platform, forms the limiting groove 132. A portion of the first throttle cylinder 21 is engaged in the limiting groove 132. (See attached figure) Figure 1 In this embodiment, the valve seat 32 can be tightly fitted (interference or transition fit) with the inner wall of the mounting hole 13 during installation, and a seal is formed between it and the inner wall of the mounting hole 13.

[0037] In this embodiment, the distance between the first annular platform and the second annular platform along the axial direction is slightly greater than the axial width of the connecting part 212, which facilitates the rotation of the first throttling cylinder 21.

[0038] See appendix Figure 1 In this embodiment, after the fluid flows in from the inlet 11, the main flow path is sequentially the opening of the first throttling cylinder 21, the inner cavity of the cylinder part 211, the window 214, and finally flows out from the outlet 12.

[0039] In one embodiment of the present invention, the throttling assembly 20 further includes a valve stem 23, a rotary drive unit, and a linear drive unit. The valve stem 23 is rotatably and slidably disposed within the mounting hole 13, with its axial direction aligned with the axial direction of the mounting hole 13. The second throttling cylinder 22 is rotatably sleeved with the valve stem 23, and the two are relatively fixed relative to each other along the axial direction. One end of the valve stem 23 is inserted into the throttling cylinder to achieve circumferential limiting. The rotary drive unit is used to drive the valve stem 23 to rotate, and the linear drive unit is used to drive the valve stem 23 to move along the axial direction.

[0040] In this embodiment, the valve stem 23 can drive the first throttling cylinder 21 to rotate. Specifically, one end of the valve stem 23 is inserted into the central hole 215. A planar fit can be designed between the outer wall of the valve stem 23 and the inner wall of the central hole 215. This planar fit 213 forms a circumferential limiting structure. In this way, the rotation of the valve stem 23 can drive the first throttling cylinder 21 to rotate. On the other hand, the valve stem 23 can slide along the axial direction. Its sliding along the axial direction can drive the second throttling cylinder 22 to move synchronously. That is to say, in this embodiment, the movement of the first throttling cylinder 21 and the second throttling cylinder 22 are both realized by the valve stem 23.

[0041] It should be noted that in this embodiment, the second throttling cylinder 22 does not rotate with the valve stem 23. In terms of configuration, the balance valve also includes a valve core sleeve 26 disposed within the mounting hole 13. One end of the second throttling cylinder 22 is inserted into the valve core sleeve 26, meaning the second throttling cylinder 22 is positioned between the valve core sleeve 26 and the valve stem 23. The valve core sleeve 26 and the second throttling cylinder 22 form an axial sliding fit and a circumferential limiting structure, thereby restricting the second throttling cylinder 22 to only slide axially with the valve stem 23 and preventing rotation.

[0042] As an embodiment of the present invention, one end (fitting part 213) of the first throttling cylinder 21 is provided with a central hole 215 and at least one flow passage 216. The central hole 215 is located at the center of the first throttling cylinder 21 and is inserted into the valve stem 23 to achieve circumferential limiting fit. The flow passage 216 is distributed around the central hole 215. A gap is formed between the inner wall of the second throttling cylinder 22 and the outer wall of the valve stem 23. The flow passage 216 communicates with the gap and is used to guide the fluid flowing in from the inlet 11 to the top side of the diaphragm 41.

[0043] See appendix Figure 2 In this embodiment, the fluid used to achieve dynamic balance flows from the gap between the flow passage 216, the valve stem 23, and the second throttling cylinder 22, as well as the gap between the second throttling cylinder 22 and the valve core, to the top side of the diaphragm 41, forming pressure on the diaphragm 41, so that the diaphragm 41 can sense the pressure of the fluid at any time, thereby maintaining the dynamic balance of the flow in the flow path (the specific dynamic balance principle is described in the balance component 40 above).

[0044] In this embodiment, there is no need to open the flow passage 216 on the valve stem 23. Instead, the fluid flow path is naturally formed by the installation and matching structure of each component. While ensuring the stable operation of each component, the reasonable use of the installation and matching gap can improve the overall structural compactness and reduce the workload of machining the flow passage 216 on the valve stem 23.

[0045] As an embodiment of the present invention, referring to the accompanying drawings, the balance valve includes a pressure cap 31, which is detachably connected to the valve body 10. The inner cavity of the pressure cap 31 is in communication with the mounting hole 13. The rotary drive unit is disposed in the inner cavity of the pressure cap 31 and includes a retainer 27 and a knob 24. The retainer 27 is detachably engaged with the pressure cap 31, and the knob 24 is rotatably mounted on the retainer 27 and connected to the valve stem 23.

[0046] In this embodiment, the valve cover and the card seat 27 are designed as detachable connection structures, which facilitates the replacement of vulnerable parts such as the elastic element 43 and the seal inside the balance valve during use.

[0047] As one embodiment of the present invention, see Appendix Figure 1 , 2 The rotary drive unit further includes an adjusting cylinder 25, with threaded connection portions 212 and drive engagement portions 213 formed at both ends of the adjusting cylinder 25. An external thread is formed on the outer side of the pressure cap 31. The threaded connection portion 212 is used to connect with the external thread, and the drive engagement portion 213 is used to selectively engage with the knob 24 and circumferentially limit the engagement to drive the rotation of the knob 24.

[0048] In this embodiment, the adjusting cylinder 25 has two main functions: First, it can be used as a protective cap on the top side of the pressure cap 31 to provide protection, at which time the threaded connection part 212 is connected to the external thread; Second, when the knob 24 needs to be turned, since the knob 24 has a small diameter, it is inconvenient to turn it manually. At this time, the driving mating part 213 is sleeved on the outside of the knob 24 and forms a circumferential mating structure with the knob 24 (which can be set as a mating structure similar to that of a wrench and a nut). In this way, the adjusting cylinder 25 can be used as a tool for turning the knob 24, making it easier for the knob 24 to turn.

[0049] As one embodiment of the present invention, see Appendix Figure 6 The balance valve also includes a bracket 44, which is disposed in the mounting hole 13, sleeved on the outside of the first throttling cylinder 21 and the second throttling cylinder 22, and located inside the flow stabilizing sleeve 42. Its top side is higher than the top side of the first throttling cylinder 21. One end of the elastic member 43 is connected to the inner top wall of the flow stabilizing sleeve 42, and the other end is connected to the top side of the bracket 44.

[0050] The bracket 44 in this embodiment includes a bottom support 441, a top support 442, and multiple connecting rods 443 connecting the top and bottom supports 441. During installation, an annular receiving groove can be formed on the top surface of the valve seat 32, and the bottom support 441 can be installed in this annular mounting groove. The top support 442 of the bracket 44 is higher than the top of the first throttling cylinder 21. The multiple connecting rods 443 are circumferentially spaced to avoid interference with fluid flow. In this embodiment, the elastic element 43 is located on the top side of the first throttling cylinder 21, thus avoiding the main flow path of the fluid. During dynamic adjustment, the elongation or compression changes of the elastic element 43 will not interfere with fluid flow, reducing interference and improving the stability of fluid flow.

[0051] In this embodiment, the balancing valve is first adjusted according to the actual flow requirements of the operating conditions. The rotary drive unit is typically manually adjusted, while the linear drive component is generally an actuator. After the balancing valve is connected to the pipeline, the actuator is connected to the valve stem 23 and can control the axial position of the second throttle cylinder 22 according to control commands, so that the opening of the window 214 of the first throttle cylinder 21 reaches a preset value. During operation, the flow balance is maintained through dynamic adjustment by the balancing component 40.

[0052] In this embodiment, the balancing valve can also be equipped with two pressure detection components 51 on the valve body 10. The location and configuration of the two pressure detection components 51 are shown in the attached figure. They are used to detect the pressure at the inlet 11 and the pressure at the outlet 12, so that the operator can understand the pressure at the inlet 11 and the outlet 12 of the balancing valve in a timely manner and facilitate debugging.

[0053] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A balancing valve, comprising a valve body (10) and a throttling assembly (20), wherein the valve body (10) is provided with an inlet (11), an outlet (12), and a mounting hole (13) located between the inlet (11) and the outlet (12), and the throttling assembly (20) is disposed within the mounting hole (13) for regulating the flow rate of the outlet (12), characterized in that, The throttling assembly (20) includes a first throttling cylinder (21) and a second throttling cylinder (22). The first throttling cylinder (21) is rotatably disposed in a mounting hole (13). The second throttling cylinder (22) is disposed in the mounting hole (13) and can move relative to the first throttling cylinder (21) along the axial direction of the mounting hole (13). A window (214) is formed on the side wall of the first throttling cylinder (21). The window (214) communicates with the inlet (11) and the outlet (12) respectively. The second throttling cylinder (22) includes a blocking part (221) corresponding to the window (214). The rotation of the first throttling cylinder (21) and the axial movement of the second throttling cylinder (22) relative to the first throttling cylinder (21) can adjust the area of ​​the opposing parts of the blocking part (221) and the window (214).

2. The balancing valve according to claim 1, characterized in that, The first throttling cylinder (21) is limited and fixed along the axial direction of the mounting hole (13), and the second throttling cylinder (22) is slidably disposed in the mounting hole (13) along the axial direction of the mounting hole (13), and the first throttling cylinder (21) and the second throttling cylinder (22) are coaxially fitted together.

3. The balancing valve according to claim 2, characterized in that, A first annular platform (131) is formed on the inner wall of the mounting hole (13). The balance valve also includes a valve seat (32), which is disposed in the mounting hole (13) and forms a gap with the first annular platform (131). A portion of the first throttle cylinder (21) is rotatably disposed between the valve seat (32) and the first annular platform (131). The valve seat (32) and the first annular platform (131) together define the axial position of the first throttle cylinder (21).

4. The balancing valve according to claim 3, characterized in that, The first throttling cylinder (21) includes a cylinder part (211), a connecting part (212), and a mating part (213). The connecting part (212) and the mating part (213) are respectively disposed at opposite ends of the cylinder part (211). The connecting part (212) protrudes from the outer side wall of the cylinder part (211) and is rotatably engaged between the valve seat (32) and the first annular platform (131). The window (214) is formed on the side wall of the cylinder part (211), and a notch is formed on the inner side wall of the mounting hole (13). The cylinder part (211) forms an opening at one end of the connecting part (212). The opening is opposite to the first end of the mounting hole (13). The opening communicates with the window (214) and the inlet (11). The window (214) is opposite to the notch. The mating part (213) is used for transmission engagement with the valve stem (23) in the throttling assembly (20).

5. The balancing valve according to any one of claims 1 to 4, characterized in that, The throttling assembly (20) further includes a valve stem (23), a rotary drive unit, and a linear drive unit. The valve stem (23) is rotatably and slidably disposed in the mounting hole (13). The axial direction of the valve stem (23) is consistent with the axial direction of the mounting hole (13). The second throttling cylinder (22) is rotatably connected to the valve stem (23). The second throttling cylinder (22) and the valve stem (23) are fixed relative to each other along the axial direction. One end of the valve stem (23) is inserted into and circumferentially limited by the first throttling cylinder (21). The rotary drive unit is used to drive the valve stem (23) to rotate. The linear drive unit is used to drive the valve stem (23) to move along the axial direction.

6. The balancing valve according to claim 5, characterized in that, One end of the first throttling cylinder (21) is formed with a central hole (215) and at least one flow passage (216). The central hole (215) is located at the center of the first throttling cylinder (21). The central hole (215) is inserted into the valve stem (23) and circumferentially limited. The flow passage (216) is arranged around the central hole (215). A gap is formed between the inner wall of the second throttling cylinder (22) and the outer wall of the valve stem (23). The gap between the flow passage (216), the valve stem (23), and the second throttling cylinder (22) is interconnected and used to guide the fluid flowing in from the inlet (11) to the top side of the diaphragm (41).

7. The balancing valve according to claim 5, characterized in that, The balance valve includes a pressure cap (31), which is detachably connected to the valve body (10). The inner cavity of the pressure cap (31) and the mounting hole (13) are interconnected. The rotary drive unit is provided with a card seat (27) and a knob (24) in the inner cavity of the pressure cap (31). The card seat (27) is detachably engaged with the pressure cap (31). The knob (24) is rotatably disposed on the card seat (27) and connected to the valve stem (23).

8. The balancing valve according to claim 7, characterized in that, The rotary drive unit also includes an adjusting cylinder (25), with threaded connection parts (212) and drive engagement parts (213) formed at both ends of the adjusting cylinder (25). The outer side of the pressure cap (31) is formed with an external thread. The threaded connection parts (212) are used to connect with the external thread. The drive engagement parts (213) are used to selectively engage with the knob (24) and circumferentially limit the engagement to drive the rotation of the knob (24).

9. The balancing valve according to any one of claims 1 to 4, characterized in that, The balancing valve further includes a balancing assembly (40), which includes a diaphragm (41), a flow stabilizing sleeve (42), and an elastic element (43). The flow stabilizing sleeve (42) is sleeved on the outside of the second throttling cylinder (22) and the first throttling cylinder (21). The diaphragm (41) is disposed on the top side of the flow stabilizing sleeve (42), and the elastic element (43) is disposed on the bottom side of the flow stabilizing sleeve (42). Fluid flowing in from the inlet (11) can pass through the first throttling cylinder (21) and the second throttling cylinder (22) and flow to the top side of the diaphragm (41). The diaphragm (41) and the elastic element (43) are used to dynamically adjust the opening of the window (214).

10. The balancing valve according to claim 9, characterized in that, The balancing assembly (40) further includes a bracket (44), which is disposed in the mounting hole (13). The bracket (44) is sleeved on the outside of the first throttling cylinder (21) and the second throttling cylinder (22) and disposed on the inside of the flow stabilizing sleeve (42). The top side of the bracket (44) is higher than the top side of the first throttling cylinder (21). One end of the elastic member (43) is connected to the inner top wall of the flow stabilizing sleeve (42), and the other end is connected to the top side of the bracket (44).

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