Hydraulic adjusting stop valve capable of automatically adjusting deviation position

Abstract

The hydraulic adjusting stop valve capable of automatically adjusting the deviation position comprises a valve body, a valve cavity is formed in the middle of the valve body, 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 and is provided with a pressure spring; the stop valve further comprises a pressurization channel and a pressure relief channel. The pressurization channel and the pressure relief channel are formed in the piston; and the two ends of the pressure spring cannot move relative to the valve cavity and the piston respectively. The stop valve has the advantages that machining and maintenance are easy, the piston can be well reset, and the opening and closing angle is relatively constant when the stop valve is opened and closed.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a hydraulic regulating stop valve capable of self-adjusting a deviation position. 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 has the following defects: 1. The pressure channel and the pressure relief channel need to be processed and formed as a whole 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 piston generally requires a special process to make it non-rotatable relative to the valve cavity, which is relatively complicated. Summary of the invention

[0004] The object of the present invention is to provide a hydraulic regulating stop valve with self-adjusting deviation position, which has the characteristics of easy processing and maintenance and good piston reset.

[0005] The technical solution adopted by the present invention is: a hydraulic regulating stop valve with self-adjusting deviation position, 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] The valve cavity is provided with a piston that can move up and down, 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 a compression spring that makes it have a downward displacement tendency;

[0007] The stop valve further includes a pressurizing channel and a pressure relief channel, wherein the lower end of the pressurizing channel is connected to the water inlet, and the lower end of the pressure relief channel is connected to the water outlet;

[0008] The stop valve also includes a rotating plate, on the lower surface of which an arc groove is provided, and the arc groove matches the upper end of the pressurizing channel and the upper end of the pressure relief channel;

[0009] The valve body is provided with a rotatable valve stem, the valve stem is connected to a driving member, and one end of the valve stem is connected to the rotating plate so as to drive the rotating plate to rotate at an angle not exceeding 180°;

[0010] The pressurizing channel and the pressure relief channel are opened on the piston, the rotating plate is pivotally connected to the upper part of the piston, and the piston is non-rotatable compared to the valve chamber;

[0011] The upper end of the compression spring has an upper vertical portion bent vertically upward, and the lower end has a lower vertical portion bent vertically downward. The upper part of the valve cavity is provided with an upper socket opening downward, and the upper part of the piston is provided with a lower socket opening downward. The upper vertical portion is inserted into the upper socket, and the lower vertical portion is inserted into the lower socket.

[0012] A fixing plate is fixed on the upper part of the piston, and a pressurizing through hole whose lower part is connected to the upper end of the pressurizing channel and a pressure relief through hole whose lower part is connected to the upper end of the pressure relief channel are provided on the fixing plate, and the upper end of the pressurizing through hole and the upper end of the pressure relief through hole match the arc groove.

[0013] Compared with the prior art, the advantages of the present invention are: easy processing and maintenance, and the piston can be easily reset. The hydraulic regulating stop valve with self-adjusting deviation position of the present invention integrates the pressurization channel and the pressure relief channel on the piston, and does not require special processing of the valve body. The piston is relatively easier to form and process, thereby ensuring the overall yield rate of the product. During later maintenance, the piston can be easily taken out for replacement or reprocessing, which is not only convenient but also reduces maintenance costs. At the same time, the upper and lower ends of the compression spring are respectively non-rotatable compared to the valve body and the piston. Once the piston is twisted, the compression spring will generate a directional rotation force, which is equivalent to a self-correcting torsion state, so that the piston can be easily and quickly reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 is a front sectional view of a hydraulic regulating stop valve with self-adjusting deviation position according to an embodiment of the present invention;

[0016] Figure 2 Compared to Figure 1 An enlarged front cross-sectional view of the piston, the fixed plate, and the rotating plate in an exploded state;

[0017] Figure 3 and Figure 4 They are bottom views of the fixed plate and the rotating plate of the present invention respectively;

[0018] 5 is a schematic diagram of the adjustment principle of the hydraulic regulating stop valve with self-adjusting deviation position according to an embodiment of the present invention;

[0019] Figure 6 is an enlarged view of the compression spring of the present invention;

[0020] Figure 7 and Figure 8 They are Figure 1 Enlarged views of parts A and B.

[0021] In the figure:

[0022] 10. valve body, 11. water inlet, 12. water outlet, 13. valve cavity, 131. upper socket, 14. cut-off surface channel;

[0023] 20. piston, 21. pressurizing channel, 22. pressure relief channel, 23. valve plate, 24. compression spring, 241. upper vertical portion, 242. lower vertical portion, 25. lower socket;

[0024] 31. fixed plate, 311. pressurizing through hole, 312. pressure relief through hole, 32. rotating plate, 321. arc groove;

[0025] 40. Valve stem. DETAILED DESCRIPTION

[0026] For example, see Figures 1 to 4As shown: A hydraulic regulating stop valve with self-adjusting deviation position and a quick 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 part of the valve body 10 and a water outlet 12 is provided on the left part. The water inlet 11 and the water outlet 12 are connected through a cut-off surface channel 14, and the cut-off surface channel 14 is located at the lower opening of the valve cavity 13. Usually, the cross-section of the valve cavity 13 is cylindrical, elliptical, etc., and the cut-off surface channel 14 is located at the lower opening of the valve cavity 13. That is, the cut-off surface channel 14 is preferably the lower opening of the valve cavity 13, and the water inlet 11 is connected to the lower part of the side wall of the valve cavity 13.

[0027] The valve cavity 13 is provided with a piston 20 that can move up and down. Obviously, a sealing ring must be embedded on the circumferential surface of the piston 20. The lower part of the piston 20 is provided with a valve plate 23 that matches the cut-off surface channel 14. That is, after the piston 20 moves up and down, it drives the valve plate 23 to move up and down to open or close the cut-off surface channel 14, so as to achieve the connection or cut-off of the water inlet 11 and the water outlet 12. The piston 20 is equipped with a compression spring 24 that makes it have a downward displacement tendency. Usually, the two ends of the compression spring 24 are respectively pressed against the upper part of the valve cavity 13 and the upper end surface of the piston 20.

[0028] The stop valve further includes a pressurizing channel 21 and a pressure relief channel 22. The lower end of the pressurizing channel 21 is connected to the water inlet 11, and the lower end of the pressure relief channel 22 is connected to the water outlet 12.

[0029] The stop valve also includes a rotating plate 32. An arc groove 321 is provided on the lower surface of the rotating plate 32, and the upper part of the arc groove 321 and the upper part of the valve cavity 13 (the so-called upper part of the valve cavity refers to the valve cavity 13 being located in the upper area of ​​the piston 20. The same below) are connected. For example, a small hole whose upper end is connected to the upper part of the valve cavity 13 is provided in the middle part of the arc groove 321. The center of the arc groove 321 is generally located on the axis line of the valve cavity 13, that is, the rotation axis of the rotating plate 32 coincides with the axis line of the valve cavity 13. The arc groove 321 matches the upper end of the pressurization channel 21 and the upper end of the pressure relief channel 22. That is, after the rotating plate 32 rotates, the downward projection of the upper end of the pressurizing channel 21 can fall within the downward projection range of the arc groove 321, or the downward projection of the upper end of the pressure relief channel 22 can fall within the downward projection range of the arc groove 321, or the downward projection of the upper end of the pressurizing channel 21 and the upper end of the pressure relief channel 22 can both fall within the downward projection range of the arc groove 321.

[0030] The valve body 10 is provided with a rotatable valve stem 40, and the upper end of the valve stem 40 is connected to a driving member (not shown in the figure). The lower end of the valve stem 40 is connected to the rotating plate 32 so as to drive the rotating plate 32 to rotate by an angle not exceeding 180°. Generally speaking, the valve stem 40 can drive the rotating plate 32 to rotate by an angle not exceeding the curvature of the arc groove 321. A more optimized method is that the curvature of the arc groove 321 is 90°, so that the rotating plate 32 rotates by an angle not exceeding 90° under the drive of the valve stem 40.

[0031] Further speaking:

[0032] The pressurizing channel 21 and the pressure relief channel 22 are provided on the piston 20, the rotating plate 32 is pivotally connected to the upper part of the piston 20, and the piston 20 cannot rotate compared to the valve chamber 13. Obviously, the lower end opening of the pressurizing channel 21 must be located on the right side wall of the piston 20, the lower end opening of the pressure relief channel 22 must be located on the lower end surface of the piston 20, and the valve plate 23 cannot cover the lower end opening of the pressure relief channel 22. In this way, the pressurizing channel 21 and the pressure relief channel 22 are integrated on the piston 20, which reduces the difficulty of manufacturing the valve body 10, and the piston 20 is relatively easy to form and process, thereby ensuring the overall yield rate of the product. During later maintenance, the piston 20 can be easily taken out for replacement or reprocessing, which is not only convenient, but also reduces maintenance costs.

[0033] Optimized:

[0034] A fixing plate 31 is fixed to the upper part of the piston 20, and a pressurizing through hole 311 is provided on the fixing plate 31, and a pressure relief through hole 312 is provided on the fixing plate 31, and the pressure relief through hole 312 is provided on the lower part, and the pressure relief through hole 311 and the pressure relief through hole 312 are connected to the upper end of the pressure relief channel 22. The upper end of the pressurizing through hole 311 and the upper end of the pressure relief through hole 312 match the arc groove 321. That is, a fixing plate 31 that is detachably fixed to the piston 20 is also provided between the lower surface of the rotating plate 32 and the upper end surface of the piston 20, and the matching between the arc groove 321 and the upper end opening of the pressurizing channel 21 and the upper end opening of the pressure relief channel 22 is realized by the pressurizing through hole 311 and the pressure relief through hole 312. In other words, the pressurizing through hole 311 is aligned with and connected to the pressurizing channel 21, and is an extension of the pressurizing channel 21, and the pressure relief through hole 312 is aligned with and connected to the pressure relief channel 22, and is an extension of the pressure relief channel 22. Since both the fixed plate 31 and the rotating plate 32 are preferably made of ceramic material, the convenience of maintenance is further increased, and the two are not prone to wear, which increases the service life of the entire stop valve.

[0035] The vertical line connecting the pressurizing through hole 311 and the rotation axis of the rotating plate 32 and the vertical line connecting the pressure relief through hole 312 and the rotation axis of the rotating plate 32 form an angle α, and the arc groove 321 has an arc β with the rotation axis of the rotating plate 32 as the axis, and α<β. In this way, when the rotating plate 32 rotates to make the pressurizing through hole 311 and the pressure relief through hole 312 change from the cut-off state to the connected state, the connecting process between the pressurizing through hole 311 and the pressure relief through hole 312 is gradual, so that the opening and closing of the valve is more gentle. That is, during the rotation of the rotating plate 32, the following processes occur in sequence: only the downward projection of the pressurizing through hole 311 is located within the downward projection range of the arc groove 321, the entire downward projection of the pressurizing through hole 311 and the downward projection part of the pressure relief through hole 312 are located within the downward projection range of the arc groove 321, the downward projection of the pressurizing through hole 311 and the downward projection of the pressure relief through hole 312 are both located within the downward projection range of the arc groove 321, the downward projection part of the pressurizing through hole 311 and the downward projection of the pressure relief through hole 312 are all located within the downward projection range of the arc groove 321, and only the pressure relief through hole 312 is located within the downward projection range of the arc groove 321, thereby forming a progressive and stable adjustment process.

[0036] Further optimization:

[0037] The upper end of the compression spring 24 cannot rotate relative to the upper part of the valve cavity 13, and the lower end cannot rotate relative to the upper part of the piston 20. For example, the upper end of the compression spring 24 is hooked to the upper part of the valve cavity 13, and the lower end is hooked to the upper part of the piston 20, so that when applying pressure, the compression spring 24 also has a force to prevent the piston 20 from rotating, making the movement of the piston 20 more stable.

[0038] Combination Figure 5-1 to Figure 5-5 As shown, the working principle of the stop valve (for the convenience of explanation, the pressure at the water inlet is represented by P1, the pressure at the water outlet is represented by P2, the pressure at the upper part of the valve cavity is represented by P3, the part of the downward projection of the pressurized channel falling within the downward projection range of the arc groove is represented by △S1, and the part of the downward projection of the pressure relief channel falling within the downward projection range of the arc groove is represented by △S2):

[0039] 1) Close the stop valve. By rotating the rotating plate 32, the pressurizing channel 21 connects the water inlet 11 with the upper part of the valve cavity 13, and the pressure relief channel 22 is closed, so that the pressure in the upper part of the valve cavity 13 increases, and the piston 20 moves downward with the assistance of the downward pressure, so that the stop valve can be closed lightly and conveniently. At this time, P1=P3.

[0040] 2) Open the stop valve. By rotating the rotating plate 32, the pressure relief channel 22 connects the water outlet 12 and the upper part of the valve cavity 13, and the pressurization channel 21 is closed, so that the pressure in the upper part of the valve cavity 13 is reduced. Only a small external force is applied (for example, the valve stem can continue to rotate to pull the piston 20 upward. This structure can adopt a variety of common methods), and the piston 20 can move upward, so that the stop valve can be opened more lightly and conveniently. At this time, P2=P3.

[0041] 3) Progressive adjustment process. In the above process of opening and closing the stop valve, the arc groove 321 will linearly maintain the change of the pressurization channel 21 being open and the pressure relief channel 22 being closed, and the pressure relief channel 22 being open and the pressurization channel 21 being closed, so that the opening and closing of the stop valve are relatively smooth, stable and fast. That is, in the process of rotating the rotating plate 32, there are at least the following changes: a. The pressure relief channel 22 is partially opened, and the pressurization channel 21 is fully connected, △S1 is the maximum value, and △S2 is not the maximum value. b. The pressure relief channel 22 and the pressurization channel 21 are fully connected at the same time, △S1 is the maximum value, and △S2 is the maximum value. c. The pressure relief channel 22 is fully connected and the pressure relief channel 21 is partially connected. At this time, P1>P3>P2. Since P1 is constant, △S1 and △S2 are changing, so P3 and P2 are also changing, causing the piston 20 to be located at different positions. If △S1 and △S2 tend to be constant, the piston 20 will be fixed at a certain position, achieving the effect of automatic and rapid adjustment.

[0042] Further optimization:

[0043] The upper end of the compression spring 24 cannot rotate relative to the upper part of the valve cavity 13, and the lower end cannot rotate relative to the upper part of the piston 20. For example, the upper end of the compression spring 24 is hooked to the upper part of the valve cavity 13, and the lower end is hooked to the upper part of the piston 20, so that when applying pressure, the compression spring 24 also has a force to prevent the piston 20 from excessively rotating, making the movement of the piston 20 more stable and easy to reset. That is, when the stop valve is opened and closed, the piston 20 and the valve stem 40 can maintain relative non-rotation to ensure that the switch angle position is constant and the movement is more stable. In this embodiment, combined with Figures 6 to 8 As shown, the upper end of the compression spring 24 has an upper vertical portion 241 bent vertically upward, and the lower end has a lower vertical portion 242 bent vertically downward. The upper part of the valve cavity 13 is provided with an upper socket 131 with an opening facing downward, and the upper part of the piston 20 is provided with a lower socket 25 with an opening facing upward. The upper vertical portion 241 is inserted into the upper socket 131, and the lower vertical portion 242 is inserted into the lower socket 25. That is, in essence, the compression spring 24 not only exerts pressure, maintains a certain torque, and then prevents the piston 20 from excessively rotating, so that the movement of the piston 20 is more stable; and the compression spring 24, the piston 20, and the valve body 10 are all easy to disassemble, and the assembly is simpler and more convenient.

[0044] 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 self-adjusting deflection position hydraulic regulating stop valve, comprising a valve body (10), the valve body (10) having a valve cavity (13) in the middle, a water inlet (11) in the right part of the valve body (10), and a water outlet (12) in the left part, the water inlet (11) and the water outlet (12) being connected via a cut-off surface channel (14), the cut-off surface channel (14) being located at the lower opening of the valve cavity (13); A piston (20) capable of moving up and down is provided in the valve cavity (13); a valve plate (23) matching the cut-off surface channel (14) is provided at the lower part of the piston (20); and a compression spring (24) is provided to enable the piston (20) to have a downward displacement tendency; The stop valve further comprises a pressurizing channel (21) and a pressure relief channel (22), wherein the lower end of the pressurizing channel (21) is connected to the water inlet (11), and the lower end of the pressure relief channel (22) is connected to the water outlet (12); The stop valve further comprises a rotating plate (32), the lower surface of which is provided with an arc-shaped groove (321), the arc-shaped groove (321) matching the upper end of the pressurizing channel (21) and the upper end of the pressure relief channel (22); The valve body (10) is provided with a rotatable valve stem (40), the valve stem (40) is connected to a driving member, and one end of the valve stem (40) is connected to the rotating plate (32) so as to be able to drive the rotating plate (32) to rotate at an angle not exceeding 180°; Features: The pressurizing channel (21) and the pressure relief channel (22) are provided on the piston (20), the rotating plate (32) is pivotally connected to the upper part of the piston (20), and the piston (20) is non-rotatable relative to the valve chamber (13); The compression spring (24) has an upper vertical portion (241) bent vertically upward at its upper end, and a lower vertical portion (242) bent vertically downward at its lower end. The valve chamber (13) has an upper socket (131) opening downward at its upper portion, and a lower socket (25) opening downward at its upper portion of the piston (20). The upper vertical portion (241) is inserted into the upper socket (131), and the lower vertical portion (242) is inserted into the lower socket (25).

2. The self-adjusting deflection position hydraulic regulating stop valve according to claim 1, characterized in that: A fixing plate (31) is fixed to the upper part of the piston (20), and a pressurizing through hole (311) whose lower part is connected to the upper end of the pressurizing channel (21) and a pressure relief through hole (212) whose lower part is connected to the upper end of the pressure relief channel (22) are provided on the fixing plate (31), and the upper end of the pressurizing through hole (311) and the upper end of the pressure relief through hole (212) match the arc groove (321).

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