counterbalance valve
Patent Information
- Application Number
- CN202522705181.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-22
AI Technical Summary
[0002]平衡阀是一种特殊功能的阀门，由于介质（各类可流动的物质）在管道的各个部分存在较大的压力差或流量差，为减小或平衡该差值，在相应的管道上安装有平衡阀，其用以调节两侧压力的相对平衡，或通过分流的方法达到流量的平衡；目前市面上的平衡阀包括阀体、阀盖、手轮和阀杆；阀体的左右两端分别形成进水端和出水端，阀体的内部设置有与进水端连通的进水通道以及与出水端连通的出水通道，进水通道的内端部与出水通道的内端部连通，阀盖螺纹紧固在阀体的顶部并与阀体周向密封，阀杆穿设在阀盖中，阀杆与阀盖螺纹连接并周向密封，手轮连接在阀杆的上端；当手轮带动阀杆转动时，阀杆的下端与进水通道的内端部之间的间隙即可被调节，此时即可实现对平衡阀的流量的调节；然而在现有的平衡阀结构中，因阀杆在生产过程中会存在长度偏差，或在阀杆被装配到平衡阀的阀体中后，阀杆会与阀体存在公差，从而会使得平衡阀对流体的流量调节存在偏差，进而会影响平衡阀对流量的控制精度
[0005]本实用新型通过采用上述结构后，由于阀杆包括第一杆体和第二杆体，且第一杆体的上端插入在第二杆体的下端中并与第二杆体螺纹连接，从而使得由第一杆体和第二杆体构成的阀杆的整体长度能够被进行调节，即在第一杆体相对第二杆体被进行调节后，能够弥补阀杆在生产过程中存在的长度偏差，以及消除阀杆与阀体之间所存在的公差，从而能够尽可能地消除平衡阀对流体的流量进行调节时所存在偏差，进而能够提高平衡阀对流量的控制精度。
Smart Images
Figure CN224919876U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, and more specifically, to a balancing valve. Background Technology
[0002] A balancing valve is a special type of valve. Because there are significant pressure or flow differences between different parts of a pipeline (various flowable substances), a balancing valve is installed on the corresponding pipeline to reduce or balance these differences. It is used to regulate the relative pressure balance on both sides or to achieve flow balance through flow diversion. Currently, balancing valves on the market include a valve body, valve cover, handwheel, and valve stem. The left and right ends of the valve body form the inlet and outlet ends, respectively. The valve body has an inlet channel communicating with the inlet end and an outlet channel communicating with the outlet end. The inner end of the inlet channel is connected to the inner end of the outlet channel. The valve cover is screwed... The valve stem is threaded and sealed to the top of the valve body, and passes through the valve cover. The valve stem is threaded to the valve cover and sealed circumferentially. The handwheel is connected to the upper end of the valve stem. When the handwheel drives the valve stem to rotate, the gap between the lower end of the valve stem and the inner end of the water inlet channel can be adjusted, thus regulating the flow rate of the balancing valve. However, in the existing balancing valve structure, due to length deviations in the valve stem during the manufacturing process, or tolerances between the valve stem and the valve body after the valve stem is assembled into the balancing valve body, the flow rate regulation of the balancing valve will deviate, which will affect the flow control accuracy of the balancing valve. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a balancing valve that can eliminate as much as possible the deviation that exists when the balancing valve regulates the flow rate of the fluid, thereby improving the control accuracy of the balancing valve on the flow rate.
[0004] This utility model provides a balancing valve, including a valve body, a valve cover, a handwheel, and a valve stem. The left and right ends of the valve body form an inlet end and an outlet end, respectively. The valve body has an inlet channel communicating with the inlet end and an outlet channel communicating with the outlet end. The inner end of the inlet channel communicates with the inner end of the outlet channel. The valve cover is threadedly fastened to the top of the valve body and circumferentially sealed. The valve stem passes through the valve cover and is threadedly connected to and circumferentially sealed to the valve cover. The handwheel is connected to the upper end of the valve stem. The valve stem includes a first rod body and a ring-shaped second rod body. The second rod body… The lower end is inserted into the upper end of the valve cover and threadedly connected to the valve cover. The handwheel is connected to the upper end of the second rod. The first rod is vertically movably inserted into the valve cover. The upper end of the first rod is inserted into the lower end of the second rod and threadedly connected to the second rod. The upper end of the first rod is provided with a regular hexagonal countersunk hole. An O-ring is embedded on the outer peripheral wall of the first rod. The O-ring is used to seal the gap between the first rod and the valve cover. When the handwheel drives the valve rod to rotate so that the valve rod moves downward into place, the lower end of the first rod is used to abut against the inner end of the water inlet channel and circumferentially seal it.
[0005] By adopting the above-described structure, this utility model allows the valve stem, comprising a first rod body and a second rod body, with the upper end of the first rod body inserted into the lower end of the second rod body and threadedly connected to it, to adjust the overall length of the valve stem composed of the first and second rod bodies. This adjustment of the first rod body relative to the second rod body compensates for length deviations in the valve stem during production and eliminates tolerances between the valve stem and valve body. Consequently, it minimizes deviations in the flow rate regulation of the fluid by the balancing valve, thereby improving the flow control accuracy of the balancing valve.
[0006] In one possible implementation, a vertically oriented insertion hole is provided in the center of the handwheel. The upper end of the second rod is inserted into the insertion hole and circumferentially limited by the insertion hole. An annular step is provided on the outer wall of the upper part of the second rod. The lower end of the handwheel, located circumferentially outside the insertion hole, abuts against the annular step. A retaining spring is fitted onto the outer wall of the upper end of the second rod, and the outer edge of the retaining spring abuts against the annular constriction on the inner edge of the insertion hole. With this structure, since the lower end of the handwheel, located circumferentially outside the insertion hole, abuts against the annular step, and since the outer edge of the retaining spring abuts against the annular constriction on the inner edge of the insertion hole, the handwheel is more securely positioned. The annular constriction at the inner edge of the hole abuts against the valve stem, thereby axially limiting the handwheel and the second rod to prevent the handwheel from detaching from the second rod. Furthermore, the insertion hole is a regular hexagonal structure, and the outer wall shape of the upper end of the second rod matches the shape of the insertion hole. Thus, after the upper end of the second rod is inserted into the insertion hole, the second rod and the handwheel are circumferentially limited, meaning the valve stem and the handwheel are circumferentially limited, allowing the handwheel to reliably drive the valve stem to rotate.
[0007] In one possible implementation, an annular conical surface is provided on the outer wall of the lower end of the first rod. When the handwheel drives the valve rod to rotate and move the valve rod downward into place, the annular conical surface is used to abut against the inner circumferential wall of the inner end of the water inlet channel and circumferentially seal it. With this structure, after the handwheel drives the valve rod to rotate and move the valve rod downward into place, the annular conical surface can abut against the inner circumferential wall of the inner end of the water inlet channel and circumferentially seal it, thereby improving the sealing effect when the first rod is tightly pressed against the inner end of the water inlet channel, that is, improving the sealing effect when the lower end of the valve rod is tightly pressed against the inner end of the water inlet channel.
[0008] In one possible implementation, the balancing valve further includes a sliding sleeve; the lower end of the sliding sleeve is fitted onto the outside of the upper end of the valve cover and circumferentially limited by the valve cover, the upper end of the sliding sleeve is inserted into the handwheel, and the outer wall of the upper end of the sliding sleeve is threadedly connected to the inner wall of the lower end of the handwheel; a scale is provided on the outer peripheral wall of the sliding sleeve, and an indicator notch is provided on the side wall of the lower end of the handwheel, with an indicator arrow provided on the inner wall of the indicator notch, the indicator arrow being used to indicate the scale to show the current opening degree of the balancing valve; with this structure, when the handwheel drives the valve stem to rotate, because the lower end of the sliding sleeve is fitted onto the outside of the upper end of the valve cover and circumferentially limited by the valve cover, the balancing valve is circumferentially limited by the handwheel. The valve cover is circumferentially limited, and because the outer wall of the upper end of the sliding sleeve is threadedly connected to the inner wall of the lower end of the handwheel, the sliding sleeve can move vertically relative to the valve cover. At the same time, the indicator arrow located inside the indicator notch can indicate different scales to show the current opening degree of the balance valve, so that the user can clearly know the current opening degree of the balance valve, which can bring convenience to the user. In addition, the outer wall of the upper end of the valve cover is formed into a regular hexagonal shape, and the inner wall of the lower end of the sliding sleeve is formed into a regular hexagonal shape that matches the upper end of the valve stem, so that the sliding sleeve and the valve cover can reliably achieve the purpose of circumferential limitation.
[0009] In one possible implementation, a drain channel is provided at the bottom of the valve body. The inner end of the drain channel is connected to the water outlet channel, and a plug is threaded to the outer end of the drain channel. A sealing ring is embedded between the plug and the outer end of the drain channel. With this structure, when the balancing valve is in the closed state (i.e., when the handwheel drives the valve stem to rotate so that the lower end of the valve stem is tightly pressed against the inner end of the water inlet channel and circumferentially sealed), the plug can be removed, allowing the water in the downstream pipeline of the balancing valve to be discharged through the drain channel. This prevents the downstream pipeline of the balancing valve from freezing and cracking in winter and when the user does not use water for a long time. Attached Figure Description
[0010] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 for Figure 1 A magnified structural diagram of point A in the middle; Figure 3 This is a three-dimensional structural diagram of the sliding sleeve; Figure 4 This is a three-dimensional structural diagram of the handwheel. Detailed Implementation
[0011] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0012] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0013] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0014] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0015] See Figures 1-4As shown in the figure, this application discloses a balancing valve, including a valve body 1, a valve cover 2, a handwheel 3, and a valve stem 4; the left and right ends of the valve body 1 respectively form an inlet end 11 and an outlet end 12, and the valve body 1 is provided with an inlet channel 111 communicating with the inlet end 11 and an outlet channel 121 communicating with the outlet end 12. The inner end of the inlet channel 111 communicates with the inner end of the outlet channel 121. The valve cover 2 is threadedly fastened to the top of the valve body 1 and is circumferentially sealed to the valve body 1. The valve stem 4 passes through the valve cover 2, and the valve stem 4 is threadedly connected to the valve cover 2 and circumferentially sealed. The handwheel 3 is connected to the upper end of the valve stem 4; the valve stem 4 includes a first rod body 41 and a ring-shaped second rod body 42; the second The lower end of the rod 42 is inserted into the upper end of the valve cover 2 and threadedly connected to the valve cover 2. The handwheel 3 is connected to the upper end of the second rod 42. The first rod 41 is vertically movably inserted into the valve cover 2. The upper end of the first rod 41 is inserted into the lower end of the second rod 42 and threadedly connected to the second rod 42. The upper end of the first rod 41 is provided with a regular hexagonal countersunk hole 411. An O-ring 43 is embedded on the outer peripheral wall of the first rod 41. The O-ring 43 is used to seal the gap between the first rod 41 and the valve cover 2. When the handwheel 3 drives the valve rod 4 to rotate so that the valve rod 4 moves downward into place, the lower end of the first rod 41 is used to abut against the inner end of the water inlet channel 111 and circumferentially seal it.
[0016] When using this invention, if it is necessary to adjust the flow control accuracy of the balancing valve, firstly, pass one end of the external hex wrench through the second rod and insert it into the countersunk hole located at the upper end of the first rod. Then, turn the first rod with the external hex wrench. At this time, the first rod can move axially relative to the second rod, so that the overall length of the valve stem composed of the first and second rods can be adjusted. That is, after the first rod is adjusted relative to the second rod, the length deviation of the valve stem during the production process can be compensated, and the tolerance between the valve stem and the valve body can be eliminated. This can minimize the deviation in the flow control accuracy of the balancing valve, thereby improving the flow control accuracy of the balancing valve.
[0017] A vertical insertion hole 31 is provided in the middle of the handwheel 3. The upper end of the second rod 42 is inserted into the insertion hole 31 and is circumferentially limited by the insertion hole 31. An annular step 421 is provided on the outer wall of the upper part of the second rod 42. The lower end of the handwheel 3, located on the outer side of the insertion hole 31, abuts against the annular step 421. A retaining spring 44 is fitted and engaged on the outer wall of the upper part of the second rod 42. The outer edge of the retaining spring 44 abuts against the annular constriction 311 located on the inner edge of the insertion hole 31. With this structure, since the lower end of the handwheel located on the outer side of the insertion hole abuts against the annular step, and since... The outer edge of the snap ring abuts against the annular constriction on the inner edge of the socket, thereby axially limiting the handwheel and the second rod to prevent the handwheel from detaching from the second rod, which in turn prevents the handwheel from detaching from the valve stem. Furthermore, the socket has a regular hexagonal shape, and the outer wall shape of the upper end of the second rod matches the shape of the socket. Thus, after the upper end of the second rod is inserted into the socket, the second rod can achieve circumferential limiting with the handwheel, which in turn limits the valve stem and the handwheel, allowing the handwheel to reliably drive the valve stem to rotate.
[0018] An annular conical surface 412 is provided on the outer wall of the lower end of the first rod 41. When the handwheel 3 drives the valve rod 4 to rotate so that the valve rod 4 moves downward into place, the annular conical surface 412 is used to abut against the inner circumferential wall of the inner end of the water inlet channel 111 and circumferentially seal it. With this structure, after the handwheel drives the valve rod to rotate so that the valve rod moves downward into place, the annular conical surface can abut against the inner circumferential wall of the inner end of the water inlet channel and circumferentially seal it, thereby improving the sealing effect when the first rod is tightly against the inner end of the water inlet channel, that is, improving the sealing effect when the lower end of the valve rod is tightly against the inner end of the water inlet channel.
[0019] The balancing valve also includes a sliding sleeve 5; the lower end of the sliding sleeve 5 is fitted onto the outside of the upper end of the valve cover 2 and is circumferentially limited by the valve cover 2, the upper end of the sliding sleeve 5 is inserted into the handwheel 3, and the outer wall of the upper end of the sliding sleeve 5 is threadedly connected to the inner wall of the lower end of the handwheel 3; a scale 51 is provided on the outer peripheral wall of the sliding sleeve 5, an indicator notch 32 is provided on the side wall of the lower end of the handwheel 3, and an indicator arrow 321 is provided on the inner wall of the indicator notch 32. The indicator arrow 321 is used to indicate the scale 51 to show the current opening degree of the balancing valve; with this structure, when the handwheel drives the valve stem to rotate, because the lower end of the sliding sleeve is fitted onto the upper end of the valve cover... The outer wall of the sliding sleeve is circumferentially limited to the valve cover, and because the outer wall of the upper end of the sliding sleeve is threadedly connected to the inner wall of the lower end of the handwheel, the sliding sleeve can move vertically relative to the valve cover. At the same time, the indicator arrow located inside the indicator notch can indicate different scales to show the current opening degree of the balance valve, so that the user can clearly know the current opening degree of the balance valve, which can bring convenience to the user. In addition, the outer wall of the upper end of the valve cover is formed into a regular hexagonal shape, and the inner wall of the lower end of the sliding sleeve is formed into a regular hexagonal shape that matches the upper end of the valve stem, so that the sliding sleeve and the valve cover can reliably achieve the purpose of circumferential limitation.
[0020] A drain channel 13 is provided at the bottom of the valve body 1. The inner end of the drain channel 13 is connected to the water outlet channel 121. A plug cap 6 is threadedly connected to the outer end of the drain channel 13. A sealing ring 7 is embedded between the plug cap 6 and the outer end of the drain channel 13. With this structure, when the balance valve is in the closed state (that is, when the handwheel drives the valve stem to rotate so that the lower end of the valve stem is tightly pressed against the inner end of the water inlet channel and circumferentially sealed), the plug cap can be removed and the water in the pipeline after the balance valve can be discharged through the drain channel. This can prevent the pipeline after the balance valve from freezing and cracking in winter and when the user does not use water for a long time.
[0021] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A balancing valve, comprising a valve body (1), a valve cover (2), a handwheel (3), and a valve stem (4); the valve body (1) has an inlet end (11) and an outlet end (12) respectively at its left and right ends; the valve body (1) has an inlet channel (111) communicating with the inlet end (11) and an outlet channel (121) communicating with the outlet end (12); the inner end of the inlet channel (111) is connected to the inner end of the outlet channel (121); the valve cover (2) is threadedly fastened to the top of the valve body (1) and circumferentially sealed to the valve body (1); the valve stem (4) passes through the valve cover (2); the valve stem (4) is threadedly connected to the valve cover (2) and circumferentially sealed; the handwheel (3) is connected to the upper end of the valve stem (4); characterized in that: The valve stem (4) includes a first rod body (41) and a ring-shaped second rod body (42); the lower end of the second rod body (42) is inserted into the upper end of the valve cover (2) and threadedly connected to the valve cover (2); the handwheel (3) is connected to the upper end of the second rod body (42); the first rod body (41) is vertically movably inserted into the valve cover (2); the upper end of the first rod body (41) is inserted into the lower end of the second rod body (42) and threadedly connected to the second rod body (42). The upper end of the first rod (41) is provided with a countersunk hole (411) in the shape of a regular hexagon. An O-ring (43) is embedded on the outer peripheral wall of the first rod (41). The O-ring (43) is used to seal the gap between the first rod (41) and the valve cover (2). When the handwheel (3) drives the valve stem (4) to rotate so that the valve stem (4) moves downward into place, the lower end of the first rod (41) is used to abut against the inner end of the water inlet channel (111) and circumferentially seal it.
2. The balancing valve according to claim 1, characterized in that: The handwheel (3) has a vertically arranged insertion hole (31) in the middle. The upper end of the second rod (42) is inserted into the insertion hole (31) and is circumferentially limited by the insertion hole (31). An annular step (421) is provided on the outer wall of the upper part of the second rod (42). The lower end of the handwheel (3) located on the outer side of the insertion hole (31) abuts against the annular step (421). A retaining spring (44) is fitted on the outer wall of the upper end of the second rod (42). The outer edge of the retaining spring (44) abuts against the annular constriction (311) located on the inner edge of the insertion hole (31).
3. The balancing valve according to claim 1, characterized in that: An annular conical surface (412) is provided on the outer wall of the lower end of the first rod body (41). When the handwheel (3) drives the valve rod (4) to rotate so that the valve rod (4) moves downward into place, the annular conical surface (412) is used to abut against the inner circumferential wall of the inner end of the water inlet channel (111) and circumferentially seal it.
4. The balancing valve according to any one of claims 1-3, characterized in that: The balance valve also includes a sliding sleeve (5); the lower end of the sliding sleeve (5) is sleeved on the outside of the upper end of the valve cover (2) and is circumferentially limited by the valve cover (2); the upper end of the sliding sleeve (5) is inserted into the handwheel (3); the outer wall of the upper end of the sliding sleeve (5) is threadedly connected to the inner wall of the lower end of the handwheel (3); a scale (51) is provided on the outer peripheral wall of the sliding sleeve (5); an indicator notch (32) is provided on the side wall of the lower end of the handwheel (3); an indicator arrow (321) is provided on the inner wall of the indicator notch (32); the indicator arrow (321) is used to indicate the scale (51) to show the current opening degree of the balance valve.
5. The balancing valve according to any one of claims 1-3, characterized in that: The bottom of the valve body (1) is provided with a drainage channel (13), the inner end of the drainage channel (13) is connected to the water outlet channel (121), and a plug cap (6) is threadedly connected to the outer end of the drainage channel (13). A sealing ring (7) is embedded between the plug cap (6) and the outer end of the drainage channel (13).