Hydraulic precise adjustment stop valve

Abstract

The hydraulic precise adjustment stop valve comprises a valve body, the valve body is provided with a valve cavity, the valve body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated through a closure surface channel; a piston is arranged in the valve cavity; a rotatable valve rod is arranged on the valve body; the piston is provided with a pressurizing channel with the upper end opened in the upper end face of the piston and the lower end communicated with the water inlet, the left portion of the piston is provided with a pressure relief channel with the upper end opened in the upper end face of the piston and the lower end communicated with the water outlet, the upper end face of the piston is provided with a rotating plate, and the rotating plate is provided with a communicating hole. The communicating hole can be matched with an opening in the upper end of the pressurization channel and an opening in the upper end of the pressure relief channel respectively, the rotating plate is in linkage with the valve rod, the middle of the valve rod penetrates through the upper portion of the valve body in a sealing fit mode, and the upper end of the valve rod is located outside the valve body. The flow regulating valve has the advantage that the flow regulation is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a hydraulic precision regulating stop valve. Background Art

[0002] In order to make the stop valve more labor-saving when opening and closing, especially in the initial stages of opening and closing, the applicant has made a number of improvements to the traditional stop valve. Among them, the improved non-return hydraulic valve includes a valve body, the middle part of which has a valve cavity, and the right part of the valve body is provided with a water inlet and the left part is provided with a water outlet, the water inlet and the water outlet are connected through a cut-off surface channel, and the cut-off surface channel is located at the lower opening of the valve cavity; a pressurizing channel and a pressure relief channel are provided on the side wall of the valve body, the pressurizing channel connects the water inlet and the valve cavity, and the pressure relief channel connects the valve cavity and the water outlet; a piston is provided in the valve cavity that can move up and down and divide the valve cavity into an upper cavity and a lower cavity, the lower part of the piston is provided with a valve plate that matches the cut-off surface channel, and the piston is provided with an elastic device that makes it have a downward displacement tendency; the valve cavity A fixed plate and a rotating plate pressed against each other are provided inside, a pressurizing hole and a pressure relief hole are provided on the fixed plate, and a pressurizing slot and a pressure relief slot which are both transparent from top to bottom are provided on the rotating plate. At the same time, the upper end of the pressurizing hole is connected to the pressurizing channel, the lower end of the pressurizing hole matches the upper end of the pressurizing slot, the upper end of the pressure relief hole is connected to the pressure relief channel, and the lower end of the pressure relief hole matches the upper end of the pressure relief slot; a rotatable valve stem is provided on the valve body, the valve stem is connected to a driving member, and one end of the valve stem is connected to the rotating plate; the cross-sections of the pressurizing slot and the pressure relief slot are both arc-shaped, and from one end of the arc to the other end, the distance between the two side walls of the pressurizing slot and the pressure relief slot gradually decreases. The elastic device generally adopts a compression spring; the driving member is generally an actuator. Such a stop valve plays a role in regulating water pressure by adjusting the amount of water flowing through the water inlet channel and the water outlet channel, making the movement of the piston more stable, slowing down the force of the valve plate opening and closing the cutoff surface channel, making it smoother whether opening or closing, ensuring the stability of the check hydraulic valve.

[0003] However, in actual use, it was found that the stop valve still had the following defects: 1. The pressure channel and the pressure relief channel need to be processed and formed as one piece with the valve body, and generally extend to the valve cover. The valve body is usually thin, long, and hollow, making the valve body, which is already difficult to process, even more difficult to form, and reducing the yield rate. 2. The flow regulation is not precise enough. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic precision regulating stop valve, which has the characteristic of regulating flow more accurately.

[0005] The technical solution adopted by the present invention is: a hydraulic precision regulating stop valve, comprising a valve body, a valve cavity in the middle of the valve body, a water inlet on the right side of the valve body and a water outlet on the left side, the water inlet and the water outlet are connected through a cut-off surface channel, and the cut-off surface channel is located at the lower opening of the valve cavity;

[0006] A piston is provided in the valve cavity, which can move up and down and cannot rotate relative to the valve cavity. A valve plate matching the cut-off surface channel is provided at the lower part of the piston, and the piston is provided with a compression spring that makes it have a downward displacement tendency.

[0007] The valve body is provided with a rotatable valve stem, and the valve stem is connected to a driving member;

[0008] The right part of the piston is provided with a pressurizing channel with an upper end opening on the upper end surface of the piston and a lower end connected to the water inlet, and the left part of the piston is provided with a pressure relief channel with an upper end opening on the upper end surface of the piston and a lower end connected to the water outlet. At the same time, a rotating plate whose rotating axis coincides with the vertical axis of the valve stem is provided on the upper end surface of the piston, and a connecting hole is provided on the rotating plate. After the rotating plate rotates, the connecting hole can respectively match the upper end opening of the pressurizing channel and the upper end opening of the pressure relief channel, and the rotating plate and the valve stem are linked, the middle part of the valve stem is sealed and fits through the upper part of the valve body, and the upper end of the valve stem is located outside the valve body.

[0009] A fixing plate is detachably fixed on the upper end surface of the piston, and a pressurizing through hole and a pressure relief through hole are respectively aligned with the upper end opening of the pressurizing channel and the pressure relief through hole are aligned with the pressure relief channel. The connecting hole can match with the upper end opening of the pressurizing channel through the pressurizing through hole, and match with the upper end opening of the pressure relief channel through the pressure relief through hole.

[0010] The communicating hole is a waist-shaped hole. Meanwhile, the upper opening of the pressurizing through hole and the upper opening of the pressure-relieving through hole are both circular.

[0011] The advantages of the present invention are: more accurate flow regulation. The hydraulic precision regulating stop valve of the present invention adjusts the flow completely through the pressure of the fluid. Although the amount of fluid in the inlet and outlet increases and the stability is slightly reduced, the flow regulation is more accurate and has its unique use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 is a front sectional view of a hydraulic precision regulating stop valve according to an embodiment of the present invention;

[0014] Figure 2 Compared to Figure 1An enlarged front cross-sectional view of the piston, the fixed plate, and the rotating plate in an exploded state;

[0015] Figure 3 and Figure 4 They are bottom views of the fixed plate and the rotating plate of the present invention respectively;

[0016] Figure 5 and Figure 6 It is a bottom view of the fixed plate and the rotating plate of the present invention cooperating with each other.

[0017] In the figure:

[0018] 10. valve body, 11. water inlet, 12. water outlet, 13. valve cavity, 14. cut-off surface channel;

[0019] 20, piston, 21, valve plate, 22, compression spring, 231, pressurizing channel, 232, pressure relief channel;

[0020] 31, fixed plate, 311, pressurizing through hole, 312, pressure relief through hole, 32, rotating plate, 321, communicating hole;

[0021] 40. Valve stem;

[0022] 50. Driving parts. DETAILED DESCRIPTION

[0023] For example, see Figures 1 to 6 As shown: a hydraulic precision regulating stop valve, comprising a valve body 10. The valve body 10 has a valve cavity 13 in the middle, and a water inlet 11 is provided on the right side of the valve body 10, and a water outlet 12 is provided on the left side. The water inlet 11 and the water outlet 12 are connected through the intercepting surface channel 14, and the intercepting surface channel 14 is located at the lower opening of the valve cavity 13. Usually, the valve cavity 13 is cylindrical or cylindrical, and the intercepting surface channel 14 is located at the lower opening of the valve cavity 13. That is, the intercepting surface channel 14 is preferably the lower opening of the valve cavity 13, so that the water inlet 11 is connected to the lower part of the side wall of the valve cavity 13.

[0024] The valve cavity 13 is provided with a piston 20 that can move up and down and cannot rotate relative to the valve cavity 13. The lower part of the piston 20 is provided with a valve plate 21 that matches the cut-off surface channel 14, and the piston 20 is provided with a compression spring 22 that makes it have a downward displacement tendency. That is, after the piston 20 moves downward, the valve plate 21 will close the cut-off surface channel 14, thereby closing the stop valve; after the piston 20 moves upward, the valve plate 21 will open the cut-off surface channel 14, thereby opening the stop valve.

[0025] The valve body 10 is provided with a rotatable valve stem 40, and the valve stem 40 is connected to a driving member 50. The driving member 50 can be an electronically driven, pneumatic or other component, or a handle.

[0026] Further speaking:

[0027] The right part of the piston 20 is provided with a pressurizing channel 231, the upper end of which opens at the upper end surface of the piston 20 and the lower end of which is connected to the water inlet 11. That is, the lower end opening of the pressurizing channel 231 is located on the right side of the lower part of the piston 20. The left part of the piston 20 is provided with a pressure relief channel 232, the upper end of which opens at the upper end surface of the piston 20 and the lower end of which is connected to the water outlet 12. That is, the lower end opening of the pressure relief channel 232 is located on the lower end surface of the piston 20. At the same time, a rotating plate 32 whose rotating axis coincides with the vertical axis of the valve stem 40 is provided on the upper end surface of the piston 20, and a connecting hole 321 connecting the upper surface and the lower surface of the rotating plate 32 is provided on the rotating plate 32. Obviously, the upper end of the connecting hole 321 is connected to the upper part of the valve cavity 13 (in this embodiment, the so-called upper part of the valve cavity refers to the part of the valve cavity located above the piston). After the rotating plate 32 rotates, the connecting hole 321 can match the upper opening of the pressurizing channel 231 and the upper opening of the pressure relief channel 232. That is, after the rotating plate 32 rotates, the connecting hole 321 is either aligned to connect with the upper opening of the pressurizing channel 231, but not aligned with the upper opening of the pressure relief channel 232, so that the pressure relief channel 232 is in a closed state; or the connecting hole 321 is aligned to connect with the upper opening of the pressure relief channel 232, but not aligned with the upper opening of the pressurizing channel 231, so that the pressurizing channel 231 is in a closed state.

[0028] The rotating plate 32 and the valve stem 40 are linked. That is, the valve stem 40 can drive the rotating plate 32 to rotate. The middle part of the valve stem 40 passes through the upper part of the valve body 10 in a sealed manner, and the upper end of the valve stem 40 is located outside the valve body 10. For example, the upper part of the valve body 10 is provided with a matching hole for the middle part of the valve stem 40 to pass through, so that the valve stem 40 can not only drive the rotating plate 32 to rotate a certain angle, but also can move upward or downward synchronously with the piston 20.

[0029] Further speaking:

[0030] A fixing plate 31 is detachably fixed on the upper end surface of the piston 20. The fixing plate 31 is provided with a pressurizing through hole 311 which is aligned with the upper end opening of the pressurizing channel 231 and a pressure relief through hole 312 which is aligned with the pressure relief channel 232. The communicating hole 321 can match the upper end opening of the pressurizing channel 231 through the pressurizing through hole 311 and the upper end opening of the pressure relief channel 232 through the pressure relief through hole 312. That is, a fixing plate 31 which plays a transitional role is provided between the rotating plate 32 and the upper end surface of the piston 20. The fixing plate 31 and the rotating plate 32 are both made of ceramic materials to extend the service life of the product and facilitate maintenance.

[0031] Optimized:

[0032] The connecting hole 321 is a waist-shaped hole. At the same time, the upper opening of the pressurizing through hole 311 and the upper opening of the pressure relief through hole 312 are both circular. The width of the waist-shaped hole is preferably equal to or slightly larger than the diameter of the circle.

[0033] Working principle (for ease of explanation, the pressure at the water inlet is represented by P1, the pressure at the water outlet is represented by P2, and the pressure on the upper part of the valve cavity is represented by P3):

[0034] 1) When opening, the pressure relief channel 232 is unblocked and the pressure channel 231 is closed. The pressure on the upper part of the valve chamber 13 is relatively small. The piston 20 can be driven to move upward and the stop valve can be opened by pulling up the valve stem 40 relatively easily through the driver 50 (the driver can be a handle with the left end hinged to the valve body, the middle connected to the upper end of the valve stem, and the right end capable of being lifted. However, it is not limited to this). At this time, P2 = P3.

[0035] 2) When closed, the pressurizing channel 231 is unblocked and the pressure relief channel 232 is closed. The pressure in the upper part of the valve cavity 13 is relatively high, and the piston 20 can be driven to move downward by the actuator 50 to close the valve stem 40, or even by the downward force of the compression spring. At this time, P1 = P3.

[0036] 3) Adjustment state, open or increase the flow, the pressure relief channel 232 is unblocked, the pressure channel 231 is closed, P2 = P3, at this time the valve stem 40 will move upward to open, the driver can be used to position the piston 20, so that the stop valve is fully or partially opened to achieve the adjustment effect. When closing or reducing the flow, the pressure channel 231 is unblocked and the pressure relief channel 232 is closed, at this time P1 = P3, the valve stem 40 will obtain a downward moving force to close the stop valve or reduce the flow. In this way, the stop valve basically uses the pressure of the fluid to achieve the effect of adjusting the flow, and the flow adjustment is relatively stable and accurate.

[0037] The valve stem of the present application drives the rotating plate 32 to rotate at a small angle and then moves up and down. This is a well-known technology and will not be described in detail.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic precision regulating stop valve, comprising a valve body (10), wherein the valve body (10) has a valve cavity (13) in the middle, and the valve body (10) has a water inlet (11) on the right and a water outlet (12) on the left, wherein the water inlet (11) and the water outlet (12) are connected via a cut-off surface channel (14), and the cut-off surface channel (14) is located at the lower opening of the valve cavity (13); A piston (20) is provided in the valve cavity (13) and is movable up and down but cannot rotate relative to the valve cavity (13). A valve plate (21) matching the cut-off surface channel (14) is provided at the lower part of the piston (20). The piston (20) is also provided with a compression spring (22) that allows it to have a downward displacement tendency. The valve body (10) is provided with a rotatable valve stem (40), and the valve stem (40) is connected to a driving member (50); Features: The right part of the piston (20) is provided with a pressurizing channel (231) with an upper end opening at the upper end surface of the piston (20) and a lower end connected to the water inlet (11), and the left part of the piston (20) is provided with a pressure relief channel (232) with an upper end opening at the upper end surface of the piston (20) and a lower end connected to the water outlet (12). At the same time, a rotating plate (32) is provided on the upper end surface of the piston (20) and the vertical axis of the valve stem (40) coincides with the rotating shaft. A connecting hole (321) is provided on the rotating plate (32), and after the rotating plate (32) rotates, the connecting hole (321) can respectively match the upper end opening of the pressurizing channel (231) and the upper end opening of the pressure relief channel (232), and the rotating plate (32) and the valve stem (40) are linked, and the middle part of the valve stem (40) is sealed and matched to pass through the upper part of the valve body (10) and the upper end of the valve stem (40) is located outside the valve body (10).

2. The hydraulic precision regulating stop valve according to claim 1, characterized in that: A fixing plate (31) is detachably fixed on the upper end surface of the piston (20), and a pressurizing through hole (311) and a pressure relief through hole (312) are respectively arranged on the fixing plate (31) and are aligned with the upper end opening of the pressurizing channel (231), and the pressure relief through hole (312) and are aligned with the pressure relief channel (232). The connecting hole (321) can match the upper end opening of the pressurizing channel (231) through the pressurizing through hole (311), and can match the upper end opening of the pressure relief channel (232) through the pressure relief through hole (312).

3. The hydraulic precision regulating stop valve according to claim 2, characterized in that: The communicating hole (321) is a waist-shaped hole. Meanwhile, the upper opening of the pressurizing through hole (311) and the upper opening of the pressure-relieving through hole (312) are both circular.

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