One-way regulating valve

Abstract

The one-way regulating valve comprises a valve body and a valve element assembly, and the valve element assembly comprises a valve deck, a throttling valve element, a one-way valve element and a compression spring. The valve body is provided with a middle cavity, a first channel and a second channel, the first channel is communicated with the bottom of the middle cavity, and the second channel is connected with the side portion of the middle cavity and located above the first channel; the valve cover is connected with the top of the middle cavity; the throttling valve element is coaxial with the middle cavity and rotationally connected to the valve deck. A sliding hole and a flow guide channel which communicate with each other are formed in the one-way valve element in the axis direction and the radial direction correspondingly, the throttling valve element is sleeved with the sliding hole in a sliding mode, the sliding hole is used for communicating with the first channel, and the flow guide channel communicates with the middle cavity; the compression spring is sleeved on the throttling valve core, and two ends of the compression spring are respectively abutted against the valve cover and the one-way valve core. The one-way regulating valve meets the requirements of full opening in the forward direction and adjustable flow in the reverse direction, only the one-way regulating valve needs to be connected into a pipe network, only the first channel and the second channel are connected, and the possibility of water leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a one-way regulating valve. Background Technique

[0002] At present, overpressure relief devices are usually installed on large-diameter industrial and civil water supply pipe networks. When the pipe network pressure is too high, the device will quickly open to relieve the pressure, and then slowly close after the pipe network pressure drops to ensure the safety of the pipe network. A regulating valve is usually installed on the overpressure relief device to control the opening and closing speed. Due to the working characteristic of the device being quick opening and slow closing, it is required that the regulating valve is fully open and has the maximum flow rate in the forward direction, and the flow rate is adjustable in the reverse direction. The forward and reverse flow rates of ordinary regulating valves are the same and cannot meet the above requirements.

[0003] In the prior art, a common method to achieve quick opening and slow closing is to connect a one-way valve in parallel beside an ordinary regulating valve. However, connecting a one-way valve in parallel beside a regulating valve requires many pipe fittings and joints, and these pipe fittings and joints are prone to leakage during the assembly process, often requiring repeated disassembly and assembly, with low efficiency; in addition, there are many components, a large volume, and a large installation space is required, which is not suitable for small-sized overpressure relief devices. Summary of the Utility Model

[0004] In view of this, the utility model provides a one-way regulating valve to solve the technical problems of easy water leakage in many pipe fittings and joints, resulting in repeated disassembly and assembly, low efficiency; many components, large volume, and large installation space required as mentioned in the above background technique.

[0005] The technical solution of the utility model is realized as follows:

[0006] The utility model provides a one-way regulating valve, including a valve body and a valve core assembly. The valve core assembly includes a valve cover, a throttle valve core, a one-way valve core, and a compression spring, wherein:

[0007] A middle cavity, a first channel, and a second channel are arranged on the valve body. The first channel and the second channel are both perpendicular to the axis direction of the middle cavity. The first channel is communicated with the bottom of the middle cavity, and the second channel is connected to the side of the middle cavity and is located above the first channel;

[0008] The valve cover is connected to the top of the middle cavity;

[0009] The throttle valve core is coaxial with the middle cavity, and the throttle valve core is rotatably connected to the valve cover;

[0010] The one-way valve core is provided with a sliding hole and a diversion channel that communicate with each other in the axial direction and the radial direction respectively. The sliding hole is slidably sleeved on the throttling valve core. The sliding hole is used to communicate with the first channel, and the diversion channel communicates with the middle cavity;

[0011] The compression spring is sleeved on the throttling valve core, and both ends are respectively abutted against the valve cover and the one-way valve core, and are used to make the one-way valve core be in sealed fit with the bottom of the middle cavity;

[0012] In the first working state, the medium flows from the first channel to the second channel. The thrust generated by the medium pressure on the one-way valve core is opposite to the elastic force of the compression spring, and the thrust is greater than the elastic force. The one-way valve core moves upward to be separated from the bottom of the middle cavity, and the middle cavity is directly communicated with the first channel. The medium enters the second channel from the first channel through the middle cavity;

[0013] In the second working state, the medium flows from the second channel to the first channel. The thrust is in the same direction as the elastic force. The throttling valve core moves upward until there is a gap between its bottom and the bottom of the sliding hole to form a throttling orifice. The medium sequentially enters the first channel from the second channel, the diversion channel and the gap, and the size of the throttling orifice is adjusted by rotating the throttling valve core to adjust the flow rate.

[0014] Based on the above technical solutions, preferably, a first seat opening is provided at the bottom of the middle cavity, and a second seat opening that is in sealed fit with the first seat opening is provided at the bottom of the one-way valve core, so as to block the middle cavity and the first channel.

[0015] Based on the above technical solutions, preferably, the cross-sectional shape of the opening of the first seat opening is a trapezoid with a wider upper part and a narrower lower part.

[0016] Based on the above technical solutions, preferably, the diversion channel includes an annular groove and a plurality of flow-through windows. The annular groove is provided on the inner wall of the sliding hole, and the plurality of flow-through windows are arranged circumferentially on the inner wall of the annular groove and penetrate to the outer wall of the one-way valve core.

[0017] Based on the above technical solutions, preferably, the middle cavity includes a first installation hole, a second installation hole and a third installation hole that are sequentially arranged from top to bottom and have gradually decreasing diameters; a first external thread is provided on the outer wall of the valve cover, and a first internal thread that matches the first external thread is provided in the first installation hole; the bottom of the valve cover is located in the third installation hole;

[0018] The one-way regulating valve further includes a first gasket, and the first gasket is arranged in the second installation hole and is hermetically filled between the valve cover and the valve body.

[0019] On the basis of the above technical solutions, preferably, a threaded hole and a shaft hole are sequentially arranged on the valve cover from top to bottom along the axial direction; the throttle valve core includes a threaded section and a smooth shaft section, the threaded section is threadedly connected to the threaded hole, the smooth shaft section is located below the threaded section, the smooth shaft end is slidably arranged in the shaft hole, and a sealing groove is arranged on the smooth shaft section;

[0020] The one-way regulating valve further includes a second sealing gasket, and the second sealing gasket is arranged in the sealing groove.

[0021] On the basis of the above technical solutions, preferably, the throttle valve core further includes a throttle section, the throttle section is located at the bottom end of the throttle valve core, and the throttle section is a frustum of a cone with the smallest bottom cross-sectional diameter.

[0022] On the basis of the above technical solutions, preferably, a chamfer is arranged at the connection position between the lower end of the sliding hole and the diversion channel, and the curved surface where the chamfer is located is parallel to the conical surface of the throttle section.

[0023] On the basis of the above technical solutions, preferably, the throttle valve core further includes an operation section, and the operation section is located at the top end of the throttle valve core; the one-way regulating valve further includes a handwheel, and the handwheel is installed on the operation section.

[0024] On the basis of the above technical solutions, preferably, a positioning ring is arranged at the top of the one-way valve core, the positioning ring is sleeved outside the throttle valve core, and the compression spring is sleeved outside the positioning ring.

[0025] The one-way regulating valve of the present utility model has the following beneficial effects compared with the prior art:

[0026] (1) When the medium flows from the first channel to the second channel, the thrust is greater than the elastic force, the one-way valve core moves upward to disengage from the bottom of the middle cavity, and the medium enters the second channel from the first channel through the middle cavity, the valve is fully open, and the flow rate is the largest; when the medium flows from the second channel to the first channel, the thrust and the elastic force are in the same direction, the one-way valve core keeps sealing and fitting with the bottom of the middle cavity, the throttle valve core moves upward until there is a gap between its bottom and the bottom of the sliding hole to form a throttle orifice, and the medium enters the first channel from the second channel, the diversion channel and the gap in sequence, and the size of the throttle orifice is adjusted by rotating the throttle valve core to adjust the flow rate; this one-way regulating valve meets the requirements of fully opening and the largest flow rate in the forward direction and adjustable flow rate in the reverse direction. It only needs to connect this one-way regulating valve to the pipe network, and there are only two connection points, namely the first channel and the second channel, reducing the possibility of water leakage;

[0027] (2) This one-way regulating valve adopts an integrated structure, replacing the split-type regulating mechanism composed of a regulating valve, a check valve and numerous pipe fittings in the prior art. It has a simple structure, a small volume, occupies a small installation space, and has better applicability;

[0028] (3) A first seat port is provided at the bottom of the middle cavity, and a second seat port is provided at the bottom of the one-way valve core. Under the elastic force of the compression spring, the second seat port is in sealing fit with the first seat port to block the middle cavity and the first channel.

[0029] (4) A throttling section is provided at the bottom end of the throttling valve core. The throttling section is a frustum of a cone with the smallest cross-sectional diameter at the bottom, so that the medium can transition smoothly at the throttling orifice, avoiding the formation of eddy currents at the corners of the sliding hole, and improving the stability and reliability of the valve.

[0030] (5) A chamfer is provided at the connection position between the lower end of the sliding hole and the diversion channel. The curved surface where the chamfer is located is parallel to the conical surface of the throttling section, making the transition of the throttling orifice more uniform, enabling the medium to flow more smoothly at the throttling orifice, avoiding the formation of eddy currents at the corners of the sliding hole, and improving the stability and reliability of the valve. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a cross-sectional view of the one-way regulating valve of the present invention;

[0033] Figure 2 It is a cross-sectional view of the valve body of the present invention;

[0034] Figure 3 It is a cross-sectional view of the valve cover of the present invention;

[0035] Figure 4 It is a structural schematic diagram of the throttling valve core of the present invention;

[0036] Figure 5 It is a cross-sectional view of the one-way valve core of the present invention;

[0037] Figure 6 It is a schematic diagram of the medium flow of the one-way regulating valve of the present invention in the first working state;

[0038] Figure 7 It is a cross-sectional view of the medium flow of the one-way regulating valve of the present invention in the second working state.

[0039] Description of the reference numerals: 1 - valve body, 2 - valve cover, 3 - throttle valve core, 4 - check valve core, 5 - compression spring, 6 - first gasket, 7 - second gasket, 8 - handwheel;

[0040] 11 - middle cavity, 111 - first mounting hole, 1111 - first internal thread, 112 - second mounting hole, 113 - third mounting hole, 12 - first passage, 13 - second passage, 14 - first seat port;

[0041] 21 - first external thread, 22 - threaded hole, 23 - shaft hole;

[0042] 31 - threaded section, 32 - smooth shaft section, 321 - sealing groove, 33 - throttle section, 34 - operating section;

[0043] 41 - sliding hole, 411 - chamfer, 42 - diversion channel, 421 - annular groove, 422 - flow - through window, 43 - second seat port, 44 - positioning ring. Detailed implementation mode

[0044] Next, in combination with the implementation mode of the present utility model, the technical solutions in the implementation mode of the present utility model will be described clearly and completely. Obviously, the described implementation mode is only a part of the implementation modes of the present utility model, rather than all the implementation modes. Based on the implementation modes in the present utility model, all other implementation modes obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0045] Refer to Figures 1 - 7 As shown, an embodiment of the present utility model provides a check valve, including a valve body 1 and a valve core assembly. The valve core assembly includes a valve cover 2, a throttle valve core 3, a check valve core 4, and a compression spring 5, wherein:

[0046] The valve body 1 is provided with a middle cavity 11, a first passage 12, and a second passage 13. The first passage 12 and the second passage 13 are both perpendicular to the axis direction of the middle cavity 11. The first passage 12 and the second passage 13 are respectively located on both sides of the middle cavity 11. The first passage 12 communicates with the bottom of the middle cavity 11, and the second passage 13 is connected to the side of the middle cavity 11 and is located above the first passage 12;

[0047] The valve cover 2 is connected to the top of the middle cavity 11;

[0048] The throttle valve core 3 is coaxial with the middle cavity 11, and the throttle valve core 3 is rotatably connected to the valve cover 2;

[0049] The one-way valve core 4 is provided with a sliding hole 41 and a diversion channel 42 that communicate with each other in the axial direction and the radial direction respectively. The sliding hole 41 is slidably sleeved on the throttle valve core 3. The sliding hole 41 is used to communicate with the first channel 12, and the diversion channel 42 communicates with the middle cavity 11;

[0050] The compression spring 5 is sleeved on the throttle valve core 3, and its two ends are respectively abutted against the valve cover 2 and the one-way valve core 4, and is used to make the one-way valve core 4 in sealing fit with the bottom of the middle cavity 11;

[0051] In the first working state, the medium flows from the first channel 12 to the second channel 13. The thrust generated by the medium pressure received by the one-way valve core 4 is opposite to the elastic force of the compression spring 5, and the thrust is greater than the elastic force. The one-way valve core 4 moves upward to disengage from the bottom of the middle cavity 11. The middle cavity 11 is directly communicated with the first channel 12, and the medium enters the second channel 13 from the first channel 12 through the middle cavity 11;

[0052] In the second working state, the medium flows from the second channel 13 to the first channel 12. The thrust is in the same direction as the elastic force. The throttle valve core 3 moves upward until there is a gap between its bottom and the bottom of the sliding hole 41 to form a throttle orifice. The medium sequentially enters the first channel 12 from the second channel 13, the diversion channel 42 and the gap, and the size of the throttle orifice is adjusted by rotating the throttle valve core 3 to adjust the flow rate.

[0053] For the one-way regulating valve provided by the embodiment of the present application, when the medium flows from the first channel 12 to the second channel 13, the thrust is greater than the elastic force, and the one-way valve core 4 moves upward to disengage from the bottom of the middle cavity 11. The medium enters the second channel 13 from the first channel 12 through the middle cavity 11, the valve is fully open, and the flow rate is the largest; when the medium flows from the second channel 13 to the first channel 12, the thrust is in the same direction as the elastic force, the one-way valve core 4 remains in sealing fit with the bottom of the middle cavity 11, and the throttle valve core 3 moves upward until there is a gap between its bottom and the bottom of the sliding hole 41 to form a throttle orifice. The medium sequentially enters the first channel 12 from the second channel 13, the diversion channel 42 and the gap, and the size of the throttle orifice is adjusted by rotating the throttle valve core 3 to adjust the flow rate; this one-way regulating valve meets the requirements of full opening and maximum flow rate in the forward direction and adjustable flow rate in the reverse direction. It only needs to connect this one-way regulating valve to the pipe network, and the connection points are only the two places of the first channel 12 and the second channel 13, reducing the possibility of water leakage; and this one-way regulating valve adopts an integrated structure, replacing the split regulating mechanism composed of a regulating valve, a check valve and many pipe fittings in the prior art, with a simple structure, small volume, small occupied installation space and better applicability.

[0054] In some embodiments, a first seat opening 14 is provided at the bottom of the middle cavity 11, and a second seat opening 43 is provided at the bottom of the one-way valve core 4 and is in sealing fit with the first seat opening 14 to block the middle cavity 11 and the first channel 12. By providing the first seat opening 14 at the bottom of the middle cavity 11 and the second seat opening 43 at the bottom of the one-way valve core 4, under the elastic force of the compression spring 5, the second seat opening 43 is in sealing fit with the first seat opening 14 to block the middle cavity 11 and the first channel 12.

[0055] In some embodiments, the cross-sectional shape of the opening of the first seat opening 14 is a trapezoid with a wider upper part and a narrower lower part. The cross-section of the opening of the first seat opening 14 is a trapezoid with a wider upper part and a narrower lower part, that is, the opening of the first seat opening 14 is a conical surface. Through such a setting, when the bottom of the one-way valve core 4 abuts against the bottom of the middle cavity 11, the sealing surfaces of the two are larger and form a wedge surface fit with each other, so that the sealing effect is better.

[0056] In some embodiments, the diversion channel 42 includes an annular groove 421 and a plurality of flow-through windows 422. The annular groove 421 is provided on the inner wall of the sliding hole 41, and the plurality of flow-through windows 422 are circumferentially provided on the inner wall of the annular groove 421 and penetrate through to the outer wall of the one-way valve core 4. By providing the plurality of flow-through windows 422 circumferentially on the inner wall of the annular groove 421 and penetrating through to the outer wall of the one-way valve core 4, the annular groove 421 is communicated with the middle cavity 11, and the sliding hole 41 is respectively communicated with the annular groove 421 and the first channel 12. Thus, in the second working state, the medium can sequentially enter the first channel 12 from the second channel 13, the middle cavity 11, the flow-through windows 422, the annular groove 421 and the gap.

[0057] In some embodiments, the middle cavity 11 includes a first mounting hole 111, a second mounting hole 112 and a third mounting hole 113 which are sequentially arranged from top to bottom and have gradually decreasing diameters; a first external thread 21 is provided on the outer wall of the valve cover 2, and a first internal thread 1111 matching the first external thread 21 is provided in the first mounting hole 111; the bottom of the valve cover 2 is located in the third mounting hole 113; the one-way regulating valve further includes a first sealing gasket 6, and the first sealing gasket 6 is provided in the second mounting hole 112 and is hermetically filled between the valve cover 2 and the valve body 1. By providing the first sealing gasket 6 in the second mounting hole 112 and hermetically filling it between the valve cover 2 and the valve body 1, the middle cavity 11 below the third mounting hole 113 is sealed, preventing the medium in the middle cavity 11 from overflowing from the connection between the valve cover 2 and the valve body 1, ensuring the sealing performance of the valve, and improving the reliability and stability of the device.

[0058] In some embodiments, a threaded hole 22 and a shaft hole 23 are sequentially arranged on the valve cover 2 from top to bottom along the axial direction; the throttle valve core 3 includes a threaded section 31 and a smooth shaft section 32, the threaded section 31 is threadedly connected to the threaded hole 22, the smooth shaft section 32 is located below the threaded section 31, the smooth shaft end is slidably arranged in the shaft hole 23, and a sealing groove 321 is arranged on the smooth shaft section 32; the one-way regulating valve further includes a second gasket 7, and the second gasket 7 is arranged in the sealing groove 321. By arranging the second gasket 7 in the sealing groove 321, the space between the smooth shaft end and the shaft hole 23 is sealed, preventing the medium in the middle cavity 11 from overflowing from the connection between the throttle valve core 3 and the valve seat, ensuring the sealing performance of the valve, and improving the reliability and stability of the device.

[0059] In some embodiments, the throttle valve core 3 further includes a throttling section 33, the throttling section 33 is located at the bottom end of the throttle valve core 3, the throttling section 33 is located below the smooth shaft section 32, and the throttling section 33 is a frustum of a cone with the smallest cross-sectional diameter at the bottom. By arranging the throttling section 33 at the bottom end of the throttle valve core 3, and the throttling section 33 being a frustum of a cone with the smallest cross-sectional diameter at the bottom, the medium can transition smoothly at the throttle orifice, avoiding the formation of eddy currents at the corners of the sliding hole 41, and improving the stability and reliability of the valve.

[0060] In some embodiments, a chamfer 411 is arranged at the connection position between the lower end of the sliding hole 41 and the diversion channel 42, and the curved surface where the chamfer 411 is located is parallel to the conical surface of the throttling section 33. By arranging the chamfer 411 at the connection position between the lower end of the sliding hole 41 and the diversion channel 42, and the curved surface where the chamfer 411 is located being parallel to the conical surface of the throttling section 33, the transition of the throttle orifice is made more uniform, enabling the medium to flow more smoothly at the throttle orifice, avoiding the formation of eddy currents at the corners of the sliding hole 41, and improving the stability and reliability of the valve.

[0061] In some embodiments, the throttle valve core 3 further includes an operating section 34, the operating section 34 is located at the top end of the throttle valve core 3, and the operating section 34 is located above the threaded section 31; the one-way regulating valve further includes a handwheel 8, and the handwheel 8 is installed on the operating section 34. By rotating the handwheel 8, the throttle valve core 3 can be driven to rotate together, causing the throttle valve core 3 to move up and down at the center of the valve cover 2, thereby adjusting the size of the throttle orifice to regulate the flow rate.

[0062] In some embodiments, a positioning ring 44 is provided at the top of the one-way valve core 4. The positioning ring 44 is sleeved outside the throttle valve core 3, and the compression spring 5 is sleeved outside the positioning ring 44. By sleeving the compression spring 5 outside the positioning ring 44, the positioning ring 44 positions the compression spring 5, so that the elastic force direction of the compression spring 5 remains parallel to the axis direction of the one-way valve core 4. The action of the elastic force makes the second seat port 43 fit more closely with the first seat port 14, improving the reliability and stability of the device.

[0063] The working principle of this one-way regulating valve is as follows:

[0064] In the first working state, the medium flows from the first channel 12 to the second channel 13. The thrust generated by the medium pressure received by the one-way valve core 4 is opposite to the elastic force direction of the compression spring 5, and the thrust is greater than the elastic force. The one-way valve core 4 moves upward to disengage from the bottom of the middle cavity 11, and the middle cavity 11 is directly communicated with the first channel 12. The valve is fully open, the flow rate is the largest, and the medium enters the second channel 13 from the first channel 12 through the middle cavity 11.

[0065] In the second working state, the medium flows from the second channel 13 to the first channel 12. The thrust is in the same direction as the elastic force. The one-way valve core 4 keeps a sealed fit with the bottom of the middle cavity 11. The throttle valve core 3 moves upward until there is a gap between its bottom and the bottom of the sliding hole 41 to form a throttle orifice. The medium sequentially enters the first channel 12 from the second channel 13, the diversion channel 42 and the gap, and the size of the throttle orifice is adjusted by rotating the throttle valve core 3 to adjust the flow rate.

[0066] This one-way regulating valve of the present application meets the requirements of being fully open and having the largest flow rate in the forward direction, and the flow rate being adjustable in the reverse direction. It only needs to be connected to the pipe network. The connection points are only the two places of the first channel 12 and the second channel 13, reducing the possibility of water leakage; and this one-way regulating valve adopts an integrated structure, replacing the split regulating mechanism composed of a regulating valve, a check valve and numerous pipe fittings in the prior art. It has a simple structure, a small volume, occupies a small installation space, and has better applicability.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A one-way regulating valve, characterized in that: It includes a valve body and a valve core assembly, wherein the valve core assembly includes a valve cover, a throttle valve core, a one-way valve core and a compression spring, wherein: The valve body is provided with a middle cavity, a first channel and a second channel, the first channel and the second channel are both perpendicular to the axial direction of the middle cavity, the first channel is communicated with the bottom of the middle cavity, and the second channel is connected with the side of the middle cavity and is located above the first channel; The valve cover is connected to the top of the middle cavity; The throttle valve core is coaxial with the middle cavity, and the throttle valve core is rotatably connected to the valve cover; The one-way valve core is provided with a sliding hole and a flow guide channel which are connected to each other along the axial direction and the radial direction, respectively. The sliding hole is slidably sleeved on the throttle valve core. The sliding hole is used to connect to the first channel, and the flow guide channel is connected to the middle cavity. The compression spring is sleeved on the throttle valve core, and both ends thereof are respectively in contact with the valve cover and the one-way valve core, so as to make the one-way valve core seal and fit with the bottom of the middle cavity; In the first working state, the medium flows from the first channel to the second channel, the thrust generated by the medium pressure on the one-way valve core is opposite to the elastic force of the compression spring, the thrust is greater than the elastic force, the one-way valve core moves up to be separated from the bottom of the middle cavity, the middle cavity is directly connected to the first channel, and the medium enters the second channel from the first channel through the middle cavity; In the second working state, the medium flows from the second channel to the first channel, the thrust is in the same direction as the elastic force, the throttle valve core moves up to a gap between its bottom and the bottom of the sliding hole to form a throttle opening, and the medium enters the first channel from the second channel, the guide channel and the gap in turn, and the size of the throttle opening is adjusted by rotating the throttle valve core to adjust the flow rate.

2. The one-way regulating valve according to claim 1, characterized in that: The bottom of the middle cavity is provided with a first seat opening, and the bottom of the one-way valve core is provided with a second seat opening which is sealed with the first seat opening so as to block the middle cavity and the first channel.

3. The one-way regulating valve according to claim 2, characterized in that: The cross-sectional shape of the opening of the first seat opening is a trapezoid that is wide at the top and narrow at the bottom.

4. The one-way regulating valve according to claim 1, characterized in that: The flow guide channel includes an annular groove and a plurality of flow windows. The annular groove is arranged on the inner wall of the sliding hole. The plurality of flow windows are circumferentially arranged on the inner wall of the annular groove and pass through the outer wall of the one-way valve core.

5. The one-way regulating valve according to claim 1, characterized in that: The middle cavity comprises a first mounting hole, a second mounting hole and a third mounting hole which are arranged in sequence from top to bottom and whose diameters decrease successively; the outer wall of the valve cover is provided with a first external thread, and the first mounting hole is provided with a first internal thread which matches the first external thread; the bottom of the valve cover is located in the third mounting hole; The one-way regulating valve further includes a first sealing gasket, which is disposed in the second mounting hole and is sealed and filled between the valve cover and the valve body.

6. The one-way regulating valve according to claim 1, characterized in that: The valve cover is provided with a threaded hole and an axial hole in sequence from top to bottom along the axial direction; the throttle valve core comprises a threaded section and an optical axis section, the threaded section is threadedly connected to the threaded hole, the optical axis section is located below the threaded section, the optical axis end is slidably arranged in the axial hole, and the optical axis section is provided with a sealing groove; The one-way regulating valve further includes a second sealing gasket, and the second sealing gasket is arranged in the sealing groove.

7. The one-way regulating valve according to claim 6, characterized in that: The throttling valve core also includes a throttling section, which is located at the bottom end of the throttling valve core. The throttling section is a frustum and has the smallest bottom cross-sectional diameter.

8. The one-way regulating valve according to claim 7, characterized in that: A chamfer is provided at a connection position between the lower end of the sliding hole and the guide channel, and a curved surface where the chamfer is located is parallel to the conical surface of the throttling section.

9. The one-way regulating valve according to claim 6, characterized in that: The throttle valve core also includes an operating section, which is located at the top end of the throttle valve core; the one-way regulating valve also includes a hand wheel, which is installed on the operating section.

10. The one-way regulating valve according to any one of claims 1 to 9, characterized in that: A positioning ring is arranged on the top of the one-way valve core, the positioning ring is sleeved outside the throttle valve core, and the compression spring is sleeved outside the positioning ring.

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