High-precision and high-stability pressure regulating valve and application method thereof

Abstract

The invention relates to the field of valves, in particular to a high-precision and high-stability pressure regulating valve and an application method thereof.The high-precision and high-stability pressure regulating valve comprises a valve body, a valve deck and a sealing device, the valve body is provided with a fluid inlet and a fluid outlet, an internal thread groove is formed in the valve body, an external thread groove is formed in the peripheral face of the valve deck, and a regulating flow channel is formed in the surface of the valve body; the sealing device comprises an elastic part and a sealing piston, a sliding runner for sliding of the sealing piston is formed in the inner wall of the external thread groove, one end of the elastic part in the elastic direction is connected to the inner wall of the sliding runner, the other end of the elastic part in the elastic direction is connected with the surface of the sealing piston, and a sliding groove for embedding of the end of the sealing piston is formed in the inner wall of the internal thread groove. Through the arrangement of the elastic piece and the sealing piston, the valve deck is not prone to rotating relative to the valve body when being impacted, the abutting force between the valve deck and the valve body is guaranteed, fluid is not prone to passing through the fluid inlet and the adjusting flow channel and overflowing from the abutting position of the valve body and the valve deck, and therefore the adjusting precision and stability of the adjusting valve are improved.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to a high-precision and high-stability pressure regulating valve and an application method thereof. Background Art

[0002] The pressure regulating valve, also known as the pressure regulating valve or self-operated balancing valve, is an intuitive and simple flow control device that mainly maintains the pressure of the pipeline system or equipment within a set range by automatically adjusting the flow rate of the medium.

[0003] The pressure reducing valve mainly includes a valve body and a valve cover. The valve cover is threaded and fixed on the valve body. The valve body is provided with a fluid inlet and a fluid outlet. The surface of the valve body facing the inner cavity of the valve cover is provided with an adjusting flow channel. The adjusting flow channel connects the fluid inlet and the fluid outlet. When the valve cover is hit and rotates, and the pressing force against the valve body is reduced, the fluid is easy to pass through the fluid inlet and the adjusting flow channel and overflow from the pressing point between the valve body and the valve cover, thereby reducing the adjustment accuracy and stability of the regulating valve. Summary of the invention

[0004] In order to improve the regulation accuracy and stability of a regulating valve, the present application provides a high-precision and high-stability pressure regulating valve and an application method thereof.

[0005] In the first aspect, the present application provides a high-precision and high-stability pressure regulating valve, which adopts the following technical solution: A high-precision and high-stability pressure-regulating valve, comprising a valve body, a valve cover and a sealing device, the valve body having a fluid inlet and a fluid outlet, the valve body being provided with an internal thread groove, the outer peripheral surface of the valve cover being provided with an external thread groove meshing with the internal thread groove, the surface of the valve body facing the inner cavity of the valve cover being provided with an adjusting flow channel, the adjusting flow channel connecting the fluid inlet and the fluid outlet, the sealing device comprising an elastic member and a sealing piston, the inner wall of the external thread groove being provided with a sliding flow channel for sliding the sealing piston, one end of the elastic member in the elastic force direction is connected to the inner wall of the sliding flow channel, the other end of the elastic member in the elastic force direction is connected to the surface of the sealing piston, the elastic member has the elastic force to drive the sealing piston to slide in a direction away from the sliding flow channel, and the end of the sealing piston has a tendency to protrude from the inner wall of the external thread groove, the inner wall of the internal thread groove is provided with a sliding groove for embedding the end of the sealing piston, and the end of the sealing piston is pressed against the inner wall of the sliding groove to form a seal.

[0006] By adopting the above technical scheme, the valve cover is threadedly tightened and fixed on the valve body, and the inner wall of the internal thread groove engages with the inner wall of the external thread groove to realize the installation of the valve cover and the valve body. At the same time, the sliding flow channel is connected to the sliding groove, and the elastic force of the elastic member drives the sealing piston to move in the direction close to the sliding groove. The end of the sealing piston is embedded in the sliding groove, and the end of the sealing piston is pressed against the inner wall of the sliding groove to form a seal, so that the valve cover is not easy to rotate relative to the valve body when impacted, and the pressing force between the valve cover and the valve body is guaranteed, so that the fluid is not easy to pass through the fluid inlet and the regulating flow channel and overflow from the pressing point between the valve body and the valve cover, thereby improving the adjustment accuracy and stability of the regulating valve.

[0007] Optionally, the sealing device also includes a sealing ring, and the inner wall of the external thread groove is provided with a sealing ring groove 1 for the sealing ring to be embedded in, and the inner wall of the internal thread groove facing the external thread groove is provided with a sealing ring groove 2 for the sealing ring to be embedded in, the inner ring of the sealing ring is pressed against the inner wall of the sealing ring groove 1 to form a seal, and the outer ring of the sealing ring is pressed against the inner wall of the sealing ring groove 2 to form a seal.

[0008] By adopting the above technical scheme, when the valve cover is threadedly tightened and fixed on the valve body, sealing ring groove one is connected to sealing ring groove two, the inner ring of the sealing ring is pressed against the inner wall of the sealing ring groove one to form a seal, and the outer ring of the sealing ring is pressed against the inner wall of the sealing ring groove two to form a seal, so that the fluid is not easy to pass through the fluid inlet and the regulating flow channel and overflow from the contact point between the valve body and the valve cover, thereby further improving the sealing stability between the valve cover and the valve body.

[0009] Optionally, the sealing device also includes an exhaust component, which includes an exhaust piston, a one-way valve 1 and a one-way valve 2. The inner wall of the valve cover is provided with an exhaust flow channel for the exhaust piston to slide, and the exhaust flow channel is connected to a sealing ring groove 1. An outlet flow channel 1 and an outlet flow channel 2 are spaced apart on the surface of the valve cover. The outlet flow channel 1 is located on a side of the outlet flow channel 2 close to the sealing ring groove 1. The outlet flow channel 1 and the outlet flow channel 2 are both connected to the exhaust flow channel. The one-way valve 1 is connected to the inner wall of the outlet flow channel 1. The one-way valve 1 supplies the outlet flow channel 1. The air is discharged, and the one-way valve is connected to the inner wall of the outlet flow channel. The one-way valve is used to allow outside air to enter the outlet flow channel. A connecting flow channel is provided on the surface of the exhaust piston facing the outlet flow channel. The connecting flow channel penetrates the outer wall of the exhaust piston and is connected to the exhaust flow channel. When the air pressure in the inner cavity of the valve cover increases, the air in the inner cavity of the valve cover enters the exhaust flow channel and squeezes the exhaust piston, driving the exhaust piston to slide in the direction close to the sealing ring groove one. The end of the exhaust piston is pressed against the surface of the sealing ring, and the connecting flow channel is connected to the outlet flow channel one.

[0010] By adopting the above technical scheme, when the air pressure in the inner cavity of the valve cover increases due to the fluid pressure regulation, the air in the inner cavity of the valve cover enters the exhaust flow channel and squeezes the exhaust piston. The exhaust piston slides along the inner wall of the exhaust flow channel toward the sealing ring groove 1 under the air pressure. The end of the exhaust piston is embedded in the sealing ring groove 1 and squeezes the sealing ring. The sealing ring is deformed under pressure and presses against the inner wall of the sealing ring groove 1, thereby increasing the pressing force between the inner ring wall of the sealing ring and the inner wall of the sealing ring groove 1. At the same time, the connecting flow channel is connected to the outlet flow channel 1, and the air in the exhaust flow channel passes through the connecting flow channel and the outlet flow channel in turn from the one-way valve. Once discharged, the pressure in the inner cavity of the valve cover is reduced, and the stability of the air pressure in the inner cavity of the valve cover is guaranteed; when the air pressure in the inner cavity of the valve cover is reduced due to the adjustment of the fluid pressure, the inner cavity of the valve cover is in a negative pressure state, and the elastic force of the sealing ring drives the exhaust piston to slide in the direction close to the inner cavity of the valve cover, and the end of the exhaust piston is flush with the inner wall of the sealing ring groove 1, and at the same time, the connecting flow channel is connected to the outlet flow channel 2, and the outside air passes through the one-way valve 2, the outlet flow channel 2, the connecting flow channel in turn and enters the inner cavity of the valve cover from the exhaust flow channel, thereby adjusting the pressure in the inner cavity of the valve cover, so that the inner cavity of the valve cover can maintain a constant pressure state, thereby ensuring the stability of the pressure regulating valve.

[0011] Optionally, the exhaust component also includes a gear 1 and an exhaust rack, the inner wall of the sealing ring groove 1 is provided with a pressing channel for the exhaust rack to slide, the pressing channel is connected to the exhaust channel, the gear 1 is rotatably connected to the inner wall of the pressing channel, the exhaust rack meshes with gear 1, and the surface of the exhaust piston is provided with a tooth groove 1 that meshes with gear 1. When the exhaust piston slides in a direction away from the sealing ring groove 1, the gear 1 rotates to drive the exhaust rack to slide in a direction close to the sealing ring groove 1, and the end of the exhaust rack protrudes from the inner wall of the sealing ring groove 1 and presses against the surface of the sealing ring to form a seal.

[0012] By adopting the above technical solution, when the exhaust piston slides in the direction away from the sealing ring groove 1, the inner wall of the tooth groove 1 meshes with the tooth surface of the gear 1, driving the gear 1 to rotate against the inner wall of the flow channel, and the exhaust rack meshes with the gear 1, driving the exhaust rack to slide in the direction close to the sealing ring groove 1, and the end of the exhaust rack protrudes out of the inner wall of the sealing ring groove 1 and presses against the surface of the sealing ring, the sealing ring is deformed under pressure and presses against the inner wall of the sealing ring groove 1, further increasing the pressing force between the inner ring of the sealing ring and the inner wall of the sealing ring groove 1.

[0013] Optionally, the abutting flow channel is connected to the sliding flow channel.

[0014] By adopting the above technical solution, the pressing flow channel is connected to the sliding flow channel. When the exhaust rack slides along the pressing flow channel toward the sealing ring groove 1, the air pressure in the pressing flow channel is reduced, and the pressing flow channel is connected to the sliding flow channel, driving the sealing piston to slide along the inner wall of the sliding flow channel toward the pressing flow channel, thereby realizing automatic adjustment of the air pressure in the pressing flow channel, thereby ensuring the stability of the operation of the pressure regulating valve.

[0015] Optionally, the valve body is connected to a clamping assembly, the clamping assembly includes a clamping piston, and the second inner wall of the sealing ring groove is provided with a clamping flow channel for the clamping piston to slide, and the clamping flow channel is connected to the sliding groove.

[0016] By adopting the above technical scheme, when the sliding channel is connected to the sliding groove, the elastic force of the elastic member drives the end of the sealing piston to embed into the sliding groove, and the circumferential outer wall of the sealing piston presses against the inner wall of the sliding groove to form a seal. At the same time, the sliding groove is connected to the clamping channel, and the air in the sliding groove enters the clamping channel to squeeze the clamping piston, driving the clamping piston to slide in the direction close to the second sealing ring groove, and the end of the sealing piston protrudes from the inner wall of the second sealing ring groove and squeezes the surface of the sealing ring. The sealing ring is deformed under pressure and presses against the inner wall of the second sealing ring groove to form a seal, thereby improving the sealing stability between the valve body and the valve cover.

[0017] Optionally, the clamping assembly also includes gear two and a clamping rack, the inner wall of the sealing ring groove two is provided with a clamping groove for the sliding of the clamping rack, the clamping groove is connected to the clamping flow channel, the gear two is rotatably connected to the inner wall of the clamping groove, the clamping rack meshes with gear two, and the surface of the clamping piston is provided with a tooth groove two that meshes with gear two.

[0018] By adopting the above technical scheme, when the sealing piston slides in the direction close to the sliding channel, the air pressure in the sliding groove decreases, driving the clamping rack to slide in the direction close to the clamping channel, the inner wall of the second tooth groove engages with the tooth surface of the second gear, driving the second gear to rotate on the inner wall of the clamping groove, the clamping rack engages with the second gear, driving the clamping rack to slide in the direction close to the second sealing ring groove, the end of the clamping rack protrudes from the inner wall of the second sealing ring groove and squeezes the sealing ring, the sealing ring is deformed under pressure and presses against the inner wall of the second sealing ring groove to form a seal, thereby improving the sealing stability between the valve body and the valve seat.

[0019] Optionally, a guide surface is provided at the end of the sealing piston facing the sliding groove, and the guide surface is in the shape of an arc protrusion. The guide surface can abut against the inner wall of the internal thread groove and guide the sealing piston to slide in a direction close to the sliding channel.

[0020] By adopting the above technical solution, when the valve cover is threadedly tightened and fixed to the valve body, the guide surface abuts against the inner wall of the internal thread groove and guides the sealing piston to slide toward the sliding channel. The guide surface is flush with the inner wall of the external thread groove, reducing the wear between the sealing piston and the inner wall of the internal thread groove, thereby extending the service life of the regulating valve.

[0021] Optionally, the outer peripheral surface of the sealing ring is covered with a water-absorbing expansion sleeve, and the surface of the water-absorbing expansion sleeve can absorb water and expand.

[0022] By adopting the above technical scheme, when external rainwater enters the sealing ring groove one and the sealing ring groove two through the contact point between the inner wall of the internal thread groove and the inner wall of the external thread groove, the water absorption and expansion sleeve absorbs water and expands to absorb water resources. At the same time, the outer ring of the sealing ring presses against the inner wall of the sealing ring groove two to form a seal, and the inner ring of the sealing ring presses against the inner wall of the sealing ring groove one to form a seal, so that rainwater is not easy to further enter the inner cavity of the valve cover, thereby improving the sealing stability between the valve cover and the valve body.

[0023] In the second aspect, the present application provides a high-precision and high-stability pressure regulating valve application method, which adopts the following technical solution: A high-precision and high-stability pressure regulating valve application method uses the above-mentioned high-precision and high-stability pressure regulating valve, comprising the following steps: To install the valve body, tighten the valve body fluid inlet thread to the fluid discharge pipe, and tighten the valve body fluid outlet thread to the fluid discharge pipe; The valve body is adjusted to adjust the size of the flow channel opening to control the fluid flow rate.

[0024] By adopting the above technical solution, the fluid discharge pipe is fixed to the fluid inlet of the valve body by tightening the threads, and the fluid discharge pipe is fixed to the fluid outlet of the valve body by tightening the threads. The size of the fluid flow rate is controlled by controlling the opening size of the regulating channel, thereby ensuring the regulation accuracy and stability of the regulating valve.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the elastic member and the sealing piston makes it difficult for the valve cover to rotate relative to the valve body when it is hit, ensuring the abutment between the valve cover and the valve body, making it difficult for the fluid to pass through the fluid inlet and the regulating flow channel and overflow from the abutment between the valve body and the valve cover, thereby improving the adjustment accuracy and stability of the regulating valve; 2. The setting of the sealing ring makes it difficult for the fluid to pass through the fluid inlet and the regulating flow channel and overflow from the contact point between the valve body and the valve cover, further improving the sealing stability between the valve cover and the valve body; 3. The exhaust piston, one-way valve 1 and one-way valve 2 are arranged to adjust the pressure of the inner cavity of the valve cover so that the inner cavity of the valve cover can maintain a constant pressure state, thereby ensuring the stability of the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view in an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0029] Description of the accompanying drawings: 1. valve body; 11. fluid inlet; 12. fluid outlet; 13. internal thread groove; 14. regulating flow channel; 15. sliding groove; 16. sealing ring groove 2; 17. pressing flow channel; 18. pressing flow channel; 19. pressing groove; 2. valve cover; 21. external thread groove; 22. sliding flow channel; 23. sealing ring groove 1; 24. exhaust flow channel; 25. outlet flow channel 1; 26. outlet flow channel 2; 3. sealing device; 31. elastic member; 32. sealing piston; 3 21. Guide surface; 33. Sealing ring; 34. Exhaust assembly; 341. Exhaust piston; 3411. Connecting flow channel; 3412. Tooth groove one; 342. One-way valve one; 343. One-way valve two; 344. Gear one; 345. Exhaust rack; 4. Valve core; 5. Valve stem; 6. Elastic member; 7. Diaphragm; 8. Valve seat; 9. Water absorption expansion sleeve; 10. Clamping assembly; 101. Clamping piston; 1011. Tooth groove two; 102. Gear two; 103. Clamping rack. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The present application embodiment discloses a high-precision and high-stability pressure regulating valve. Figure 1 and Figure 2 The high-precision and high-stability pressure regulating valve comprises a valve body 1, a valve cover 2, a sealing device 3, a valve core 4, a valve stem 5, an elastic member 6, a diaphragm 7 and a valve seat 8. A fluid inlet 11 and a fluid outlet 12 are correspondingly provided at both ends of the valve body 1. An internal thread groove 13 is provided on the top surface of the valve body 1. An external thread groove 21 meshing with the internal thread groove 13 is provided on the outer peripheral surface of the valve cover 2. The diaphragm 7 is embedded in the internal thread groove 13. The valve cover 2 is screwed and fixed on the valve body 1. The valve cover 2 and the valve body 1 clamp the two sides of the diaphragm 7 to form a fixation. An adjusting flow channel 14 is provided on the surface of the valve body 1 facing the diaphragm 7. The adjusting flow channel 14 connects the fluid inlet 11 and the fluid outlet 12. The valve seat 8 is installed on the inner wall of the adjusting flow channel 14 facing the diaphragm 7. One end of the valve core 4 is fixed on the surface of the diaphragm 7 facing the valve seat 8. The other end of the valve core 4 is embedded in the inner cavity of the valve seat 8 to form a seal, thereby realizing the closure of the adjusting flow channel 14.

[0032] Reference Figure 2 The valve stem 5 is threadedly connected to the end of the valve cover 2 away from the valve body 1, and the end of the valve stem 5 is embedded in the inner cavity of the valve cover 2. The elastic member 6 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 6 is a compression spring with a certain deformation ability. One end of the elastic member 6 in the elastic direction is pressed against the end of the valve stem 5, and the other end of the elastic member 6 in the elastic direction is pressed against the surface of the diaphragm 7. When the valve stem 5 is rotated, the valve stem 5 is driven to penetrate into the inner cavity of the valve stem 5. The elastic force of the elastic member 6 squeezes the diaphragm 7 to deform, driving the position of the valve core 4 in the inner cavity of the valve seat 8 to change, thereby realizing the controllable control of the flow rate in the inner cavity of the regulating channel 14, thereby ensuring the regulation accuracy and stability of the regulating valve.

[0033] Reference Figure 2 and Figure 3 , the sealing device 3 is installed between the valve body 1 and the valve cover 2, and the sealing device 3 can improve the sealing stability between the valve body 1 and the valve cover 2. The sealing device 3 includes an elastic member 31, a sealing piston 32, a sealing ring 33 and an exhaust assembly 34. The elastic member 31 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 31 is a compression spring with a certain deformation ability. The material of the sealing piston 32 can be rubber or silicone. In the embodiment of the present application, the material of the sealing piston 32 is rubber with a certain deformation ability. The inner wall of the external thread groove 21 is provided with a sliding flow channel 22 for the sealing piston 32 to slide. One end of the elastic force direction of the elastic member 31 is fixed to the surface of the sealing piston 32, and the elastic force direction of the elastic member 31 is fixed to the surface of the sealing piston 32. The other end is fixed to the inner wall of the sliding channel 22, and the elastic force of the elastic member 31 drives the sealing piston 32 to slide in the direction away from the sliding channel 22, and the end of the sealing piston 32 tends to protrude from the inner wall of the external thread groove 21, and the internal thread groove 13 is provided with a sliding groove 15 for the end of the sealing piston 32 to be embedded in the inner wall of the sliding channel 22, and the end of the sealing piston 32 can press against the inner wall of the sliding groove 15 to form a seal, so that the valve seat 8 is not easy to rotate relative to the valve body 1 when impacted, ensuring that the fluid is not easy to pass through the fluid inlet 11 and the regulating channel 14 and overflow from the pressing point between the valve body 1 and the valve cover 2, thereby improving the sealing stability between the valve body 1 and the valve cover 2, thereby improving the adjustment accuracy and stability of the regulating valve.

[0034] Reference Figure 2 and Figure 3 The end surface of the sealing piston 32 facing the sliding groove 15 is provided with a guide surface 321, and the guide surface 321 is in the shape of a circular arc protrusion. When the valve cover 2 is screwed and fixed on the valve body 1, the guide surface 321 abuts against the inner wall of the internal thread groove 13 and guides the sealing piston 32 to slide toward the sliding channel 22. The guide surface 321 is flush with the inner wall of the internal thread groove 13, reducing the wear between the sealing piston 32 and the inner wall of the internal thread groove 13, thereby extending the service life of the regulating valve.

[0035] Reference Figure 2 and Figure 3 The material of the sealing ring 33 can be rubber or silicone. In the embodiment of the present application, the material of the sealing ring 33 is rubber, which has a certain deformation ability. The inner wall of the external thread groove 21 is provided with a sealing ring groove 23 for the inner ring of the sealing ring 33 to be embedded in, and the inner wall of the internal thread groove 13 facing the sealing ring groove 23 is provided with a sealing ring groove 26 for the outer ring of the sealing ring 33 to be embedded in. The inner ring of the sealing ring 33 is pressed against the inner wall of the sealing ring groove 23 to form a seal, and the outer ring of the sealing ring 33 is pressed against the inner wall of the sealing ring groove 26 to form a seal, thereby further improving the sealing stability between the valve body 1 and the valve cover 2.

[0036] Reference Figure 2 and Figure 3 A water-absorbing and swelling sleeve 9 is coaxially sleeved on the outer circumferential surface of the sealing ring 33. In the embodiment of the present application, the material of the water-absorbing and swelling sleeve 9 is a water-absorbing resin. When external rainwater enters the sealing ring groove 1 23 and the sealing ring groove 2 16 through the abutment between the inner wall of the internal thread groove 13 and the inner wall of the external thread groove 21, the water-absorbing and swelling sleeve 9 absorbs water and expands and squeezes the sealing ring 33. The sealing ring 33 is compressed and deformed to press against the inner wall of the sealing ring groove 1 23 and the inner wall of the sealing ring groove 2 16, thereby further improving the sealing stability between the valve cover 2 and the valve body 1.

[0037] Reference Figure 2 and Figure 3 The diaphragm 7 separates the inner cavity of the valve cover 2 and the inner cavity of the valve body 1. When the elastic member 6 drives the diaphragm 7 to deform, the air pressure in the inner cavity of the valve body 1 and the inner cavity of the valve cover 2 is changed. The exhaust component 34 can adjust the air pressure in the inner cavity of the valve cover 2. The exhaust component 34 includes an exhaust piston 341, a one-way valve 1 342, a one-way valve 2 343, a gear 1 344 and an exhaust rack 345. The material of the exhaust piston 341 can be rubber or silicone. In the embodiment of the present application, the material of the exhaust piston 341 is rubber, which has a certain deformation ability. The inner cavity wall of the valve cover 2 is provided with an exhaust flow channel 24 for the exhaust piston 341 to slide. The exhaust piston 341 The sliding direction of the valve cover 2 is parallel to the sliding direction of the sealing piston 32, the exhaust flow channel 24 is connected to the sealing ring groove 1 23, and the surface of the valve cover 2 is provided with an outlet flow channel 1 25 and an outlet flow channel 2 26, the outlet flow channel 1 25 is located on the side of the outlet flow channel 2 26 close to the sealing ring groove 1 23, the outlet flow channel 1 25 and the outlet flow channel 2 26 are both connected to the exhaust flow channel 24, the one-way valve 1 342 is installed on the inner wall of the outlet flow channel 1 25, the one-way valve 1 342 is used to discharge the air in the outlet flow channel 1 25, the one-way valve 2 343 is installed on the inner wall of the outlet flow channel 2 26, the one-way valve 2 343 is used to allow outside air to enter the outlet flow channel 2 26.

[0038] Reference Figure 2 and Figure 3 , a connecting flow channel 3411 is provided on the surface of the exhaust piston 341 facing the outlet flow channel 26, and the connecting flow channel 3411 penetrates the surface of the exhaust piston 341 in the direction close to the sliding flow channel 22 and connects with the sliding flow channel 22; when the diaphragm 7 is deformed in the direction close to the inner cavity of the valve cover 2, the air pressure in the inner cavity of the valve cover 2 increases, and the air in the valve cover 2 squeezes the exhaust piston 341 through the sliding flow channel 22, and the exhaust piston 341 slides along the inner wall of the sliding flow channel 22 in the direction close to the sealing ring 33, and the end of the exhaust piston 341 protrudes from the inner wall of the sealing ring groove 23 and squeezes the sealing ring 33, and the sealing ring 33 is deformed under pressure and presses against the inner wall of the sealing ring groove 23, and at the same time, the connecting flow channel 3411 connects the outlet flow channel 25 and the sliding flow channel 22, and the air in the sliding flow channel 22 passes through the connecting flow channel 3411 and the outlet flow channel 25 in turn and is discharged from the one-way valve 342, thereby reducing the pressure in the inner cavity of the valve cover 2.

[0039] Reference Figure 2 and Figure 3 When the diaphragm 7 is deformed toward the direction approaching the valve body 1, the air pressure in the inner cavity of the valve cover 2 decreases, the air pressure on the exhaust piston 341 disappears, and the elastic force of the sealing ring 33 drives the exhaust piston 341 to slide toward the direction approaching the sliding channel 22. The connecting channel 3411 connects the outlet channel 26 and the sliding channel 22. The outside air passes through the one-way valve 343, the outlet channel 26 and the connecting channel 3411 in turn and enters the inner cavity of the valve cover 2 from the sliding channel 22, thereby realizing automatic regulation of the air pressure in the inner cavity of the valve cover 2, thereby ensuring the stability of the operation of the regulating valve.

[0040] Reference Figure 2 and Figure 3 The inner wall of the sealing ring groove 23 is provided with a pressing channel 17 for the sliding of the exhaust rack 345, the sliding direction of the exhaust rack 345 and the sliding direction of the exhaust piston 341 are perpendicular to each other, the pressing channel 17 is connected to the exhaust channel 24, the gear 344 is rotatably connected to the inner wall of the pressing channel 17, the exhaust rack 345 meshes with the gear 344, and the surface of the exhaust piston 341 is provided with a tooth groove 3412 meshing with the gear 344; when the exhaust piston 341 slides in the direction away from the sliding channel 22, the gear 344 is driven to rotate on the inner wall of the pressing channel 17, and the exhaust rack 345 is driven to slide in the direction close to the sealing ring groove 23, the end of the exhaust rack 345 protrudes from the inner wall of the sealing ring groove 23 and presses against the surface of the sealing ring 33, the sealing ring 33 is deformed under pressure and presses against the inner wall of the sealing ring groove 23, thereby ensuring the sealing stability between the valve body 1 and the valve cover 2.

[0041] Reference Figure 2 and Figure 3 The valve body 1 is equipped with a clamping assembly 10, which can squeeze the sealing ring 33 to deform. The clamping assembly 10 includes a clamping piston 101, a gear 102 and a clamping rack 103. In the embodiment of the present application, the exhaust rack 345 is equivalent to a piston, and the pressing flow channel 17 is connected to the sliding flow channel 22. The material of the clamping piston 101 can be rubber or silicone. In the embodiment of the present application, the material of the clamping piston 101 is rubber, which has a certain deformation ability. The inner wall of the sealing ring groove 16 is provided with a clamping flow channel 18 for the sliding of the clamping piston 101. The sliding direction of the plug 101 and the sliding direction of the exhaust rack 345 are mutually parallel, and the clamping channel 18 is connected to the sliding groove 15; the inner wall of the sealing ring groove 16 is provided with a clamping groove 19 for the clamping rack 103 to slide, the sliding direction of the clamping rack 103 and the sliding direction of the exhaust piston 341 are parallel to each other, the clamping groove 19 is connected to the clamping channel 18, the gear 102 is rotatably connected to the inner wall of the clamping groove 19, the clamping rack 103 meshes with the gear 102, and the surface of the clamping piston 101 is provided with a tooth groove 1011 meshing with the gear 102.

[0042] Reference Figure 2 and Figure 3 When the end of the sealing piston 32 is embedded in the sliding groove 15, the air in the sliding groove 15 enters the clamping flow channel 18 and squeezes the clamping piston 101. The clamping piston 101 slides in the direction close to the sealing ring groove 16 under the air pressure. The end of the clamping piston 101 protruding from the inner wall of the sealing ring groove 16 squeezes the sealing ring 33. The sealing ring 33 is deformed under pressure and presses against the inner wall of the sealing ring groove 16 to form a seal. At the same time, the inner wall of the tooth groove 1011 meshes with the tooth surface of the gear 102, driving the gear 102 to rotate, driving the clamping rack 103 to slide in the direction away from the sealing ring groove 16, and the end of the clamping rack 103 is flush with the inner wall of the sealing ring groove 16.

[0043] Reference Figure 2 and Figure 3 When the exhaust rack 345 slides toward the direction close to the sealing ring groove 1 23, the air pressure in the pressing channel 17 decreases, and the elastic force of the sealing ring 33 drives the pressing piston 101 to slide toward the pressing channel 18. The air in the pressing channel 18 enters the sliding groove 15 to squeeze the sealing piston 32, driving the sealing piston 32 to slide toward the sliding channel 22. At the same time, the gear 2 102 rotates, driving the pressing rack 103 to slide toward the sealing ring groove 2 16. The end of the pressing rack 103 protrudes from the sealing ring groove 2 16 to squeeze the sealing ring 33. The sealing ring 33 is deformed under pressure and presses against the inner wall of the sealing ring groove 2 16 to form a seal.

[0044] The implementation principle of a high-precision and high-stability pressure-regulating valve in an embodiment of the present application is as follows: the valve cover 2 is threadedly tightened and fixed on the valve body 1, the inner wall of the internal thread groove 13 engages with the inner wall of the external thread groove 21, the sliding channel 22 is connected to the sliding groove 15, and the elastic force of the elastic member 31 drives the sealing piston 32 to move in the direction close to the sliding groove 15, and the end of the sealing piston 32 is embedded in the sliding groove 15, and the end of the sealing piston 32 is pressed against the inner wall of the sliding groove 15 to form a seal, so that the valve seat 8 is not easy to rotate relative to the valve body 1 when impacted, ensuring that the fluid is not easy to pass through the fluid inlet 11 and the regulating channel 14 and overflow from the tight contact between the valve body 1 and the valve cover 2, thereby improving the sealing stability between the valve body 1 and the valve cover 2, thereby improving the regulation accuracy and stability of the regulating valve.

[0045] The present application also discloses a method for applying a high-precision and high-stability pressure regulating valve, which uses the above-mentioned high-precision and high-stability pressure regulating valve and includes the following steps: The valve body 1 is installed by screwing the fluid inlet 11 of the valve body 1 to fix it on the fluid discharge pipe, and the fluid outlet 12 of the valve body 1 is screwed to fix it on the fluid discharge pipe; The valve body 1 is adjusted to adjust the opening size of the regulating flow channel 14 to control the fluid flow size.

[0046] The implementation principle of a high-precision and high-stability pressure-regulating valve application method in an embodiment of the present application is as follows: the fluid discharge pipe is fixed to the fluid inlet 11 of the valve body 1 by threaded tightening, and the fluid discharge pipe is fixed to the fluid outlet 12 of the valve body 1 by threaded tightening, and the size of the fluid flow rate is controlled by controlling the opening size of the regulating channel 14, thereby ensuring the regulation accuracy and stability of the regulating valve.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. High-precision and high-stability pressure regulating valve, characterized by: The invention comprises a valve body (1), a valve cover (2) and a sealing device (3), wherein the valve body (1) has a fluid inlet (11) and a fluid outlet (12), the valve body (1) is provided with an internal thread groove (13), the outer peripheral surface of the valve cover (2) is provided with an external thread groove (21) meshing with the internal thread groove (13), the surface of the valve body (1) facing the inner cavity of the valve cover (2) is provided with an adjusting flow channel (14), the adjusting flow channel (14) connects the fluid inlet (11) and the fluid outlet (12), the sealing device (3) comprises an elastic member (31) and a sealing piston (32), the inner wall of the external thread groove (21) is provided with a sealing piston (32) for the sealing piston (32) a sliding channel (22) for sliding, one end of the elastic member (31) in the elastic direction is connected to the inner wall of the sliding channel (22), and the other end of the elastic member (31) in the elastic direction is connected to the surface of the sealing piston (32), the elastic member (31) has an elastic force driving the sealing piston (32) to slide in a direction away from the sliding channel (22), and the end of the sealing piston (32) has a tendency to protrude from the inner wall of the external thread groove (21), the inner wall of the internal thread groove (13) is provided with a sliding groove (15) for the end of the sealing piston (32) to be embedded, and the end of the sealing piston (32) is pressed against the inner wall of the sliding groove (15) to form a seal.

2. The high-precision and high-stability pressure regulating valve according to claim 1, characterized in that: The sealing device (3) further comprises a sealing ring (33); the inner wall of the external thread groove (21) is provided with a sealing ring groove 1 (23) for the sealing ring (33) to be inserted into; the inner wall of the internal thread groove (13) facing the external thread groove (21) is provided with a sealing ring groove 2 (16) for the sealing ring (33) to be inserted into; the inner ring of the sealing ring (33) is pressed against the inner wall of the sealing ring groove 1 (23) to form a seal; and the outer ring of the sealing ring (33) is pressed against the inner wall of the sealing ring groove 2 (16) to form a seal.

3. The high-precision and high-stability pressure regulating valve according to claim 2, characterized in that: The sealing device (3) further comprises an exhaust assembly (34), the exhaust assembly (34) comprising an exhaust piston (341), a one-way valve 1 (342) and a one-way valve 2 (343); an exhaust flow channel (24) for the exhaust piston (341) to slide is provided on the inner wall of the valve cover (2); the exhaust flow channel (24) is connected to the sealing ring groove 1 (23); an outlet flow channel 1 (25) and an outlet flow channel 2 (26) are provided on the surface of the valve cover (2); the outlet flow channel 1 (25) is located on a side of the outlet flow channel 2 (26) close to the sealing ring groove 1 (23); the outlet flow channel 1 (25) and the outlet flow channel 2 (26) are both connected to the exhaust flow channel (24); the one-way valve 1 (342) is connected to the inner wall of the outlet flow channel 1 (25); the one-way valve 1 (342) is connected to the outlet flow channel 1 (25) The air in the exhaust passage (24) is discharged, the one-way valve (343) is connected to the inner wall of the outlet passage (26), the one-way valve (343) allows outside air to enter the outlet passage (26), the exhaust piston (341) is provided with a connecting passage (3411) on the surface facing the outlet passage (26), the connecting passage (3411) penetrates the outer wall of the exhaust piston (341) and is connected to the exhaust passage (24), when the air pressure in the inner cavity of the valve cover (2) increases, the air in the inner cavity of the valve cover (2) enters the exhaust passage (24) and squeezes the exhaust piston (341), driving the exhaust piston (341) to slide in the direction close to the sealing ring groove (23), the end of the exhaust piston (341) is pressed against the surface of the sealing ring (33), and the connecting passage (3411) is connected to the outlet passage (25).

4. The high-precision and high-stability pressure regulating valve according to claim 3 is characterized in that: The exhaust assembly (34) further comprises a gear 1 (344) and an exhaust rack (345); the inner wall of the sealing ring groove 1 (23) is provided with a pressing channel (17) for the exhaust rack (345) to slide; the pressing channel (17) is connected to the exhaust channel (24); the gear 1 (344) is rotatably connected to the inner wall of the pressing channel (17); the exhaust rack (345) meshes with the gear 1 (344); the surface of the exhaust piston (341) is provided with a tooth groove 1 (3412) meshing with the gear 1 (344); when the exhaust piston (341) slides in a direction away from the sealing ring groove 1 (23), the gear 1 (344) rotates, driving the exhaust rack (345) to slide in a direction close to the sealing ring groove 1 (23); the end of the exhaust rack (345) protrudes from the inner wall of the sealing ring groove 1 (23) and presses against the surface of the sealing ring (33) to form a seal.

5. The high-precision and high-stability pressure regulating valve according to claim 4, characterized in that: The abutting flow channel (17) is connected to the sliding flow channel (22).

6. The high-precision and high-stability pressure regulating valve according to claim 5, characterized in that: The valve body (1) is connected to a clamping assembly (10), the clamping assembly (10) comprising a clamping piston (101), the inner wall of the second sealing ring groove (16) is provided with a clamping flow channel (18) for the clamping piston (101) to slide, and the clamping flow channel (18) is connected to the sliding groove (15).

7. The high-precision and high-stability pressure regulating valve according to claim 6, characterized in that: The clamping assembly (10) further comprises a second gear (102) and a clamping rack (103); the inner wall of the second sealing ring groove (16) is provided with a clamping groove (19) for the clamping rack (103) to slide; the clamping groove (19) is connected to the clamping flow channel (18); the second gear (102) is rotatably connected to the inner wall of the clamping groove (19); the clamping rack (103) meshes with the second gear (102); and the surface of the clamping piston (101) is provided with a second tooth groove (1011) meshing with the second gear (102).

8. The high-precision and high-stability pressure regulating valve according to claim 1, characterized in that: The sealing piston (32) is provided with a guide surface (321) at the end portion facing the sliding groove (15); the guide surface (321) is in the shape of a circular arc protrusion; the guide surface (321) can abut against the inner wall of the internal thread groove (13) and guide the sealing piston (32) to slide in a direction close to the sliding channel (22).

9. The high-precision and high-stability pressure regulating valve according to claim 2, characterized in that: The outer peripheral surface of the sealing ring (33) is covered with a water-absorbing expansion sleeve (9), and the surface of the water-absorbing expansion sleeve (9) can absorb water and expand.

10. The application method of the high-precision and high-stability pressure regulating valve is characterized by: A high-precision and high-stability pressure regulating valve according to any one of claims 1 to 9 is used, comprising the following steps: The valve body (1) is installed by screwing the fluid inlet (11) of the valve body (1) into the fluid discharge pipe, and screwing the fluid outlet (12) of the valve body (1) into the fluid discharge pipe; The valve body (1) is adjusted to adjust the opening size of the regulating flow channel (14) to control the fluid flow size.

Images