Sealing buffer type high-pressure check valve

Abstract

The invention discloses a sealed buffer type high-pressure check valve which comprises a valve body, a liquid inlet cavity, a liquid discharge cavity, a valve seat, a valve clack body, a pressure sensor, a valve rod, a buffer spring, a top sleeve groove, a guide rod, a guide groove, an electric hydraulic device and a touch display center. The pressure sensor at the bottom of the valve clack body senses the pressure between the contact surfaces of the valve clack body and the valve seat in real time when the check valve is in a closed state, and the electric hydraulic device drives the top sleeve groove to move downwards to compress the buffer spring, so that the pressure increase of the buffer spring is adjusted, and the sealing effect of the valve clack body is guaranteed; the guide groove formed in the top of the valve rod is matched with the guide rod axially arranged in the top sleeve groove to limit and guide the valve rod, the sealing stability of the valve clack body is improved, the embedded elastic buffering heads evenly arranged at the bottom of the valve clack body in a surrounding mode are used for elastic buffering, and the impact force between the valve clack body and a valve seat when the valve clack body is closed is effectively reduced; and the check valve is high in high pressure resistance and impact resistance and long in service life.

Description

Technical Field

[0001] This invention relates to the technical field of valves, and in particular to the technical field of sealed buffer type high-pressure check valves. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. The lift type check valve is similar in structure to the gate valve, except that it lacks the valve stem that drives the valve disc.

[0003] Chinese patent application number 201621469677.0 discloses a swing check valve with a left and right valve body, which reduces the space between the inflow and outflow channels, making it lighter and saving materials. When the sealing pair between the valve seat and the valve disc is severely corroded, the left and right valve bodies can be disassembled, the valve seat and valve disc can be removed, and new valve seats and valve discs can be replaced. Its installation and disassembly are convenient, greatly reducing economic losses. However, this valve body still has some shortcomings in use: when the medium in the valve body is interrupted or diverted, the swing check valve will automatically close. Since the valve body does not have a buffer function, the valve plate has a large impact force on the valve seat sealing surface, causing impact wear.

[0004] Chinese Patent Application No. 200410091111.4 discloses a full-flow buffer check valve, which includes a tubular valve body with circumferentially distributed pressure relief grooves on the inner wall of the valve body. A slide seat that can slide back and forth relative to the valve body is provided in the valve body. An elastic element is provided between the rear of the slide seat and the valve body base. The front end of the slide seat is limited by an end face retaining ring, which is installed at the front end of the valve body. A valve plate is provided in the slide seat, which opens with the flow direction and forms a water-facing angle α facing the counterflow direction, and closes with the counterflow direction and seals with the boss on the inner wall of the slide seat. The valve plate uses the elastic element to buffer, the pressure relief grooves to relieve pressure, and the space expanded by the rearward movement of the valve plate after sealing with the valve seat to buffer and balance the water hammer impact, vibration and noise when the valve plate is closed. Due to the large structural gaps of all relatively moving parts, misalignment is easy to cause the valve plate and valve seat to leak.

[0005] Chinese patent application number 202122701788.7 discloses a lift check valve with a buffer structure, including a valve body, a valve core, a valve disc, and a return spring. A fixed cylinder is fixed to the top of the valve body, and the valve core and the return spring are both disposed inside the fixed cylinder. A side groove is formed on the inner surface wall of the valve body near the medium entry point, and a buffer part is disposed in the side groove. In the above check valve, after the medium is introduced, the pressure of the water flow will lift the valve disc, and the valve disc will squeeze the fixed block. After sliding past the fixed block, the valve opens. When the pump stops, the water flow back to the valve disc and is reset by the return spring. The return spring is subjected to repeated compression deformation and release movement over a long period of time, which will cause the elasticity of the return spring to gradually decrease or even completely lose its elasticity, resulting in a weakening of the sealing effect of the check valve.

[0006] In traditional check valves, increased inlet water pressure causes the valve plate to open instantly. However, the valve stem's upward movement cannot be buffered, forcing its top to impact the valve cover to stop. This impact can damage the valve stem, reducing the check valve's lifespan. During continuous check valve operation, the force generated by fluid flow constantly compresses the spring. This repeated compression and release causes the spring's elasticity to gradually decrease or even disappear completely. Furthermore, prolonged exposure to high temperature and pressure also affects the spring's elasticity, weakening the check valve's sealing effect and reducing its lifespan. In high-pressure check valves, the impact force between the valve disc and seat when the valve closes is significant, easily damaging the sealing surface and affecting its sealing performance and lifespan. When the pump stops or the main valve closes, the inlet medium impacts the valve disc due to inertia, affecting its closing effect and potentially causing damage, further impacting its sealing performance and lifespan. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art and propose a sealed buffer type high-pressure check valve that can adjust the pressure of the buffer spring to ensure the sealing effect of the valve disc body, improve the sealing stability of the valve disc body, and the check valve has strong high pressure resistance and impact resistance, and a long service life.

[0008] To achieve the above objectives, this invention proposes a sealed buffer type high-pressure check valve, comprising a valve body, an inlet chamber, a drain chamber, a valve seat, a valve disc body, pressure sensors, a valve stem, a buffer spring, a top sleeve groove, a guide rod, a guide groove, an electro-hydraulic actuator, and a touch display center. The valve body has an inlet chamber on its left side and a drain chamber on its right side, connected by a valve seat. The valve disc body is located at the top of the valve seat opening. Several pressure sensors are evenly arranged around the bottom edge of the valve disc body. A valve stem is axially mounted on the top of the valve disc body, and a buffer spring is sleeved on the valve stem. The bottom end of the buffer spring abuts against the valve disc body. The top end of the valve stem is fitted with a top groove with an open bottom end, and the bottom end of the top groove abuts against the top end of the buffer spring. A guide rod is axially arranged inside the top groove. A guide groove with an open top end is axially arranged inside the valve stem. The guide rod is slidably arranged in the guide groove. An electro-hydraulic actuator is installed at the top end of the top groove. The electro-hydraulic actuator is fixedly arranged on the upper part of the valve body. The electro-hydraulic actuator is connected to a pressure sensor. A touch display center is arranged on the top of the valve body. The touch display center is connected to the electro-hydraulic actuator and the pressure sensor respectively.

[0009] Preferably, the bottom edge of the valve disc body is uniformly surrounded by a plurality of buffer grooves with bottom openings. The buffer grooves are axially disposed within the valve disc body. A compression spring is disposed inside the buffer groove. The top end of the compression spring is fixedly disposed at the top of the buffer groove. An elastic buffer head is connected to the bottom end of the compression spring. The inner sidewall of the buffer groove is smooth. The elastic buffer head is slidably disposed within the buffer groove. The sidewall of the elastic buffer head matches the sidewall of the buffer groove. An elastic ball head is disposed at the bottom end of the elastic buffer head. The elastic ball head abuts against the valve seat.

[0010] Preferably, the upper end of the valve stem is slidably disposed in the top sleeve groove, the opening size of the top sleeve groove matches the size of the valve stem, a buffer inner spring is sleeved on the guide rod, the bottom end of the buffer inner spring abuts against the top opening of the guide groove, the top end of the buffer inner spring abuts against the top of the top sleeve groove, and the center lines of the guide rod and the top sleeve groove are located on the same straight line.

[0011] Preferably, the top sleeve groove is a smooth cylindrical groove, the bottom end of the guide rod is provided with a guide cone, the upper part of the valve stem is provided with a sealing ring groove, an elastic sealing ring is fitted in the sealing ring groove, and the outer circumference of the elastic sealing ring abuts against the inner sidewall of the top sleeve groove.

[0012] Preferably, the upper part of the valve body is provided with a limiting groove, the top sleeve is slidably disposed in the limiting groove, the inner side wall of the limiting groove is provided with an elastic buffer sleeve, the elastic buffer sleeve is sleeved on the outer side of the top sleeve, and the outer side of the top sleeve is a smooth straight surface.

[0013] Preferably, a structural reinforcing ring is provided extending downward from the bottom of the valve seat opening. The structural reinforcing ring and the valve seat are an integral structure. The inner diameter of the structural reinforcing ring gradually increases from bottom to top, and the thickness of the structural reinforcing ring gradually increases from bottom to top. The top inner diameter of the structural reinforcing ring is the same as the opening diameter of the valve seat.

[0014] Preferably, a fixed flange is provided on the outer side of the opening of the liquid inlet chamber and the liquid outlet chamber, and a plurality of fixed threaded holes are evenly arranged around the fixed flange.

[0015] Preferably, a conical groove is provided at the bottom center of the valve disc body, the axis of the conical groove and the valve disc body are on the same straight line, the bottom opening diameter of the conical groove is smaller than the opening diameter of the valve seat, and a wear-resistant and corrosion-resistant coating is uniformly provided on the inner side of the conical groove.

[0016] Preferably, there are multiple pressure sensors, which are evenly embedded around the bottom edge of the valve disc body, and the bottom surface of the pressure sensors is in contact with the top surface of the valve seat.

[0017] The beneficial effects of this invention are as follows: This invention combines a valve body, inlet chamber, outlet chamber, valve seat, valve disc body, pressure sensor, valve stem, buffer spring, top sleeve groove, guide rod, guide groove, electro-hydraulic actuator, and touch display center. Through experimental optimization, the pressure sensor at the bottom of the valve disc body senses the pressure between the valve disc body and the valve seat contact surface in real time when the check valve is closed. When the pressure sensor reading is too low, it indicates that the elasticity of the buffer spring has decreased. The electro-hydraulic actuator then moves the top sleeve groove downwards to compress the buffer spring, thereby increasing the pressure of the buffer spring and ensuring the sealing effect of the valve disc body. The guide groove at the top of the valve stem, in conjunction with the guide rod axially positioned within the top sleeve groove, limits and guides the valve stem, effectively preventing valve disc body sealing leakage caused by valve stem misalignment and improving the sealing stability of the valve disc body. The embedded elastic buffer heads evenly arranged around the bottom of the valve disc body provide elastic cushioning, effectively reducing the impact force between the valve disc body and the valve seat when closed, preventing damage to the sealing surface. The structural reinforcement ring at the bottom of the valve seat opening enhances the valve seat's impact and deformation resistance, improving its sealing effect and service life. The check valve exhibits strong high-pressure and impact resistance, and a long service life.

[0018] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the sealed buffer type high-pressure check valve of the present invention; Figure 2 This is a partial enlarged structural diagram of the sealed buffer type high-pressure check valve of the present invention; Figure 3 This is a partial enlarged structural diagram of the sealed buffer type high-pressure check valve of the present invention.

[0020] In the diagram: 1-Valve body, 2-Inlet chamber, 3-Drain chamber, 4-Valve seat, 5-Valve disc body, 6-Pressure sensor, 7-Valve stem, 8-Buffer spring, 9-Top sleeve groove, 10-Guide rod, 11-Guide groove, 12-Electro-hydraulic actuator, 13-Touch display center, 14-Buffer groove, 15-Elastic buffer head, 16-Compression spring, 17-Inner buffer spring, 18-Limiting slide groove, 19-Structural reinforcing convex ring, 20-Conical groove, 21-Sealing ring groove, 22-Elastic sealing ring, 23-Elastic buffer sleeve. Detailed Implementation

[0021] Example 1 See Figure 1 , Figure 2 and Figure 3This invention relates to a sealed buffer type high-pressure check valve, comprising a valve body 1, an inlet chamber 2, a drain chamber 3, a valve seat 4, a valve disc body 5, a pressure sensor 6, a valve stem 7, a buffer spring 8, a top sleeve groove 9, a guide rod 10, a guide groove 11, an electro-hydraulic actuator 12, and a touch display center 13. The inlet chamber 2 is located on the left side of the valve body 1, and the drain chamber 3 is located on the right side of the valve body 1. The inlet chamber 2 and the drain chamber 3 are connected by the valve seat 4. The valve disc body 5 is located at the top of the opening of the valve seat 4. Several pressure sensors 6 are evenly arranged around the bottom edge of the valve disc body 5. The valve stem 7 is axially arranged at the top of the valve disc body 5, and a buffer spring 8 is sleeved on the valve stem 7. The bottom end of the buffer spring 8 abuts against the valve disc body 5. The valve stem 7 has a top sleeve groove 9 with an open bottom end fitted at its top end. The bottom end of the top sleeve groove 9 abuts against the top end of the buffer spring 8. A guide rod 10 is axially arranged inside the top sleeve groove 9, and a guide groove 11 with an open top end is axially arranged inside the valve stem 7. The guide rod 10 is slidably arranged in the guide groove 11. An electric hydraulic actuator 12 is installed at the top end of the top sleeve groove 9. The electric hydraulic actuator 12 is fixedly arranged on the upper part of the valve body 1 and is connected to the pressure sensor 6. A touch display center 13 is arranged on the top of the valve body 1. The touch display center 13 is connected to the electric hydraulic actuator 12 and the pressure sensor 6 respectively. Several buffer grooves with open bottom ends are evenly arranged around the bottom edge of the valve disc body 5. A buffer groove 14 is axially positioned within the valve disc body 5. A compression spring 16 is installed inside the buffer groove 14, with its top end fixedly positioned at the top of the groove. An elastic buffer head 15 is connected to the bottom end of the spring 16. The inner wall of the buffer groove 14 is smooth. The elastic buffer head 15 is slidably positioned within the groove 14, its sidewall matching the sidewall of the groove 14. An elastic ball head is positioned at the bottom end of the elastic buffer head 15, abutting against the valve seat 4. The upper end of the valve stem 7 is slidably positioned within a top sleeve groove 9, the opening size of which matches the size of the valve stem 7. A guide rod 10 is fitted with... A buffer inner spring 17 is provided, the bottom end of which abuts against the top opening of the guide groove 11, and the top end of which abuts against the top of the top sleeve groove 9. The axis of the guide rod 10 and the top sleeve groove 9 are on the same straight line. The top sleeve groove 9 is a smooth cylindrical groove. A guide cone is provided at the bottom end of the guide rod 10. A sealing ring groove 21 is provided at the upper part of the valve stem 7. An elastic sealing ring 22 is fitted inside the sealing ring groove 21. The outer circumference of the elastic sealing ring 22 abuts against the inner sidewall of the top sleeve groove 9. A limiting slide groove 18 is provided at the upper part of the valve body 1. The top sleeve groove 9 is slidably disposed in the limiting slide groove 18. An elastic buffer sleeve 23 is provided on the inner sidewall of the limiting slide groove 18.The elastic buffer sleeve 23 is fitted onto the outer side of the top groove 9. The outer side of the top groove 9 is a smooth, straight surface. A structural reinforcing ring 19 extends downward from the bottom of the opening of the valve seat 4. The structural reinforcing ring 19 and the valve seat 4 are an integral structure. The inner diameter and thickness of the structural reinforcing ring 19 gradually increase from bottom to top. The top inner diameter of the structural reinforcing ring 19 is the same as the opening diameter of the valve seat 4. Fixed flanges are provided on the outer sides of the openings of the liquid inlet chamber 2 and the liquid outlet chamber 3. A plurality of fixed threaded holes are evenly arranged around the fixed flange. A conical groove 20 is provided at the center of the bottom of the valve disc body 5. The axis of the conical groove 20 and the valve disc body 5 are on the same straight line. The bottom opening diameter of the conical groove 20 is smaller than the opening diameter of the valve seat 4. A wear-resistant and corrosion-resistant coating is evenly provided on the inner surface of the conical groove 20. There are multiple pressure sensors 6, which are evenly embedded around the bottom edge of the valve disc body 5. The bottom surface of the pressure sensor 6 is in contact with the top surface of the valve seat 4.

[0022] Example 2 See Figure 1 , Figure 2 and Figure 3This invention relates to a sealed buffer type high-pressure check valve, comprising a valve body 1, an inlet chamber 2, a drain chamber 3, a valve seat 4, a valve disc body 5, a pressure sensor 6, a valve stem 7, a buffer spring 8, a top sleeve groove 9, a guide rod 10, a guide groove 11, an electro-hydraulic actuator 12, and a touch display center 13. The inlet chamber 2 is located on the left side of the valve body 1, and the drain chamber 3 is located on the right side of the valve body 1. The inlet chamber 2 and the drain chamber 3 are connected by the valve seat 4. The valve disc body 5 is located at the top of the opening of the valve seat 4. A plurality of pressure sensors 6 are evenly arranged around the bottom edge of the valve disc body 5. The valve stem 7 is axially arranged at the top of the valve disc body 5, and a buffer spring 8 is sleeved on the valve stem 7. The bottom end of the buffer spring 8 abuts against the valve disc body 5. The valve stem 7 has a top sleeve groove 9 with an open bottom end fitted at its top end. The bottom end of the top sleeve groove 9 abuts against the top end of the buffer spring 8. A guide rod 10 is axially arranged inside the top sleeve groove 9. A guide groove 11 with an open top end is axially arranged inside the valve stem 7. The guide rod 10 is slidably arranged in the guide groove 11. An electric hydraulic actuator 12 is installed at the top end of the top sleeve groove 9. The electric hydraulic actuator 12 is fixedly arranged on the upper part of the valve body 1. The electric hydraulic actuator 12 is connected to the pressure sensor 6. A touch display center 13 is arranged on the top of the valve body 1. The touch display center 13 is connected to the electric hydraulic actuator 12 and the pressure sensor 6 respectively. Several buffer grooves with open bottom ends are evenly arranged around the bottom edge of the valve disc body 5. 4. The buffer groove 14 is axially disposed within the valve disc body 5. A compression spring 16 is disposed inside the buffer groove 14. The top end of the compression spring 16 is fixedly disposed at the top of the buffer groove 14, and an elastic buffer head 15 is connected to the bottom end of the compression spring 16. The inner sidewall of the buffer groove 14 is smooth. The elastic buffer head 15 is slidably disposed within the buffer groove 14, and the sidewall of the elastic buffer head 15 matches the sidewall of the buffer groove 14. An elastic ball head is disposed at the bottom end of the elastic buffer head 15, and the elastic ball head abuts against the valve seat 4. The upper end of the valve stem 7 is slidably disposed within the top sleeve groove 9, and the opening size of the top sleeve groove 9 matches the size of the valve stem 7. An inner buffer spring is sleeved on the guide rod 10. Spring 17, the bottom end of the inner buffer spring 17 abuts against the top opening of the guide groove 11, the top end of the inner buffer spring 17 abuts against the top of the top sleeve groove 9, the axis of the guide rod 10 and the top sleeve groove 9 are on the same straight line, the top sleeve groove 9 is a smooth cylindrical groove, the bottom end of the guide rod 10 is provided with a guide cone, the upper part of the valve stem 7 is provided with a sealing ring groove 21, the sealing ring groove 21 is fitted with an elastic sealing ring 22, the outer circumference of the elastic sealing ring 22 abuts against the inner sidewall of the top sleeve groove 9, the bottom opening of the valve seat 4 is provided with a structural reinforcing protrusion ring 19 extending downward, the structural reinforcing protrusion ring 19 and the valve seat 4 are an integral structure, the inner diameter of the structural reinforcing protrusion ring 19 gradually increases from bottom to topThe thickness of the reinforcing ring 19 gradually increases from bottom to top. The top inner diameter of the reinforcing ring 19 is the same as the opening diameter of the valve seat 4. A conical groove 20 is provided at the center of the bottom of the valve disc body 5. The axis of the conical groove 20 and the valve disc body 5 are on the same straight line. The bottom opening diameter of the conical groove 20 is smaller than the opening diameter of the valve seat 4. A wear-resistant and corrosion-resistant coating is uniformly provided on the inner surface of the conical groove 20. There are multiple pressure sensors 6, which are uniformly embedded around the bottom edge of the valve disc body 5. The bottom surface of the pressure sensors 6 is in contact with the top surface of the valve seat 4.

[0023] Example 3 See Figure 1 , Figure 2 and Figure 3This invention relates to a sealed buffer type high-pressure check valve, comprising a valve body 1, an inlet chamber 2, a drain chamber 3, a valve seat 4, a valve disc body 5, a pressure sensor 6, a valve stem 7, a buffer spring 8, a top sleeve groove 9, a guide rod 10, a guide groove 11, an electro-hydraulic actuator 12, and a touch display center 13. The inlet chamber 2 is located on the left side of the valve body 1, and the drain chamber 3 is located on the right side of the valve body 1. The inlet chamber 2 and the drain chamber 3 are connected by the valve seat 4. The valve disc body 5 is located at the top of the opening of the valve seat 4. Several pressure sensors 6 are evenly arranged around the bottom edge of the valve disc body 5. The valve stem 7 is axially arranged at the top of the valve disc body 5, and a buffer spring 8 is sleeved on the valve stem 7. The bottom end of the buffer spring 8 abuts against the valve disc body 5. The valve stem 7 has a top sleeve groove 9 with an open bottom end fitted at its top end. The bottom end of the top sleeve groove 9 abuts against the top end of the buffer spring 8. A guide rod 10 is axially arranged inside the top sleeve groove 9, and a guide groove 11 with an open top end is axially arranged inside the valve stem 7. The guide rod 10 is slidably arranged in the guide groove 11. An electric hydraulic actuator 12 is installed at the top end of the top sleeve groove 9. The electric hydraulic actuator 12 is fixedly arranged on the upper part of the valve body 1 and is connected to the pressure sensor 6. A touch display center 13 is arranged on the top of the valve body 1. The touch display center 13 is connected to the electric hydraulic actuator 12 and the pressure sensor 6 respectively. Several buffer grooves with open bottom ends are evenly arranged around the bottom edge of the valve disc body 5. A buffer groove 14 is axially positioned within the valve disc body 5. A compression spring 16 is installed inside the buffer groove 14, with its top end fixedly positioned at the top of the groove. An elastic buffer head 15 is connected to the bottom end of the spring 16. The inner wall of the buffer groove 14 is smooth. The elastic buffer head 15 is slidably positioned within the groove 14, its sidewall matching the sidewall of the groove 14. An elastic ball head is positioned at the bottom end of the elastic buffer head 15, abutting against the valve seat 4. The upper end of the valve stem 7 is slidably positioned within a top sleeve groove 9, the opening size of which matches the size of the valve stem 7. A guide rod 10 is fitted with... A buffer inner spring 17 is provided, the bottom end of which abuts against the top opening of the guide groove 11, and the top end of which abuts against the top of the top sleeve groove 9. The axis of the guide rod 10 and the top sleeve groove 9 are on the same straight line. The top sleeve groove 9 is a smooth cylindrical groove. A guide cone is provided at the bottom end of the guide rod 10. A sealing ring groove 21 is provided at the upper part of the valve stem 7. An elastic sealing ring 22 is fitted inside the sealing ring groove 21. The outer circumference of the elastic sealing ring 22 abuts against the inner sidewall of the top sleeve groove 9. A limiting slide groove 18 is provided at the upper part of the valve body 1. The top sleeve groove 9 is slidably disposed in the limiting slide groove 18. An elastic buffer sleeve 23 is provided on the inner sidewall of the limiting slide groove 18.The elastic buffer sleeve 23 is fitted onto the outer side of the top sleeve groove 9. The outer side of the top sleeve groove 9 is a smooth, straight surface. A structural reinforcing ring 19 extends downward from the bottom of the opening of the valve seat 4. The structural reinforcing ring 19 and the valve seat 4 are an integral structure. The inner diameter and thickness of the structural reinforcing ring 19 gradually increase from bottom to top. The top inner diameter of the structural reinforcing ring 19 is the same as the opening diameter of the valve seat 4. Fixed flanges are provided on the outer sides of the openings of the liquid inlet chamber 2 and the liquid outlet chamber 3. Several fixed threaded holes are evenly arranged around the fixed flanges. A conical groove 20 is provided at the center of the bottom of the valve disc body 5. The axis of the conical groove 20 and the valve disc body 5 are on the same straight line. The bottom opening diameter of the conical groove 20 is smaller than the opening diameter of the valve seat 4. A wear-resistant and corrosion-resistant coating is evenly provided on the inner side of the conical groove 20.

[0024] This invention combines a valve body 1, an inlet chamber 2, an outlet chamber 3, a valve seat 4, a valve disc body 5, a pressure sensor 6, a valve stem 7, a buffer spring 8, a top sleeve groove 9, a guide rod 10, a guide groove 11, an electro-hydraulic actuator 12, and a touch display center 13. Through experimental optimization, the pressure sensor 6 at the bottom of the valve disc body 5 senses the pressure between the contact surfaces of the valve disc body 5 and the valve seat 4 in real time when the check valve is closed. When the pressure value of the pressure sensor 6 is too low, it indicates that the elasticity of the buffer spring 8 has decreased. The electro-hydraulic actuator 12 then moves the top sleeve groove 9 downward to compress the buffer spring 8, thereby increasing the pressure of the buffer spring 8 and ensuring the sealing effect of the valve disc body 5. The guide groove 11 at the top of the valve stem 7, together with the guide rod 10 axially arranged in the top sleeve groove 9, limits and guides the valve stem 7, effectively preventing misalignment of the valve stem 7 and leakage of the valve disc body 5, thus improving the sealing stability of the valve disc body 5. The embedded elastic buffer head 15 evenly arranged around the bottom of the valve disc body 5 provides elastic buffering, effectively reducing the impact force between the valve disc body 5 and the valve seat 4 when closed, making it less likely to damage the sealing surface. The structural reinforcement ring 19 at the bottom of the opening of the valve seat 4 provides structural reinforcement, which can improve the impact resistance and deformation resistance of the valve seat 4, improve the sealing effect and service life of the valve seat 4. The check valve has strong high pressure resistance and impact resistance, and a long service life.

[0025] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A seal-buffered high pressure check valve characterized by: The utility model provides a valve, including valve body (1), liquid inlet cavity (2), liquid outlet cavity (3), valve seat (4), valve body (5), pressure sensor (6), valve rod (7), buffer spring (8), top sleeve groove (9), guide rod (10), guide slot (11), electric hydraulic device (12) and touch display hub (13), the left side of valve body (1) is provided with liquid inlet cavity (2), the right side of valve body (1) is provided with liquid outlet cavity (3), liquid inlet cavity (2) and liquid outlet cavity (3) are connected through valve seat (4) and are communicated, the opening top of valve seat (4) is provided with valve body (5), the bottom edge of valve body (5) is evenly surrounded and is provided with a plurality of pressure sensor (6), the top axial of valve body (5) is provided with valve rod (7), valve rod (7) is provided with buffer spring (8) on sleeve, the bottom end of buffer spring (8) is in contact with valve body (5), the top end of valve rod (7) is provided with the bottom end opening top sleeve groove (9) on sleeve, the bottom end of top sleeve groove (9) is in contact with the top end of buffer spring (8), the inside axial of top sleeve groove (9) is provided with guide rod (10), the inside axial of valve rod (7) is provided with the top end opening guide slot (11), guide rod (10) is slidably arranged in guide slot (11), the top of top sleeve groove (9) is installed electric hydraulic device (12), electric hydraulic device (12) is fixedly arranged on the upper portion of valve body (1), electric hydraulic device (12) is connected with pressure sensor (6), the top of valve body (1) is provided with touch display hub (13), touch display hub (13) is connected with electric hydraulic device (12) and pressure sensor (6) respectively.

2. The sealed cushioned high pressure check valve of claim 1, wherein: The bottom edge of valve body (5) is evenly surrounded and is provided with a plurality of bottom end opening buffer grooves (14), buffer grooves (14) are axially arranged in valve body (5), the inside of buffer groove (14) is provided with compression spring (16), the top end of compression spring (16) is fixedly arranged on the top of buffer groove (14), the bottom end of compression spring (16) is connected and is provided with elastic buffer head (15), the inner side wall of buffer groove (14) is smooth, the elastic buffer head (15) is slidably arranged in buffer groove (14), the side wall of elastic buffer head (15) is consistent with the side wall of buffer groove (14), the bottom end of elastic buffer head (15) is provided with elastic ball head, and the elastic ball head is in contact with valve seat (4).

3. The sealed cushioned high pressure check valve of claim 1, wherein: The upper end of valve rod (7) is slidably arranged in top sleeve groove (9), the opening size of top sleeve groove (9) is consistent with the size of valve rod (7), buffer inner spring (17) is provided on guide rod (10), the bottom end of buffer inner spring (17) is in contact with the top end opening of guide slot (11), the top end of buffer inner spring (17) is in contact with the top of top sleeve groove (9), the axial center line of guide rod (10) and top sleeve groove (9) is on the same straight line.

4. The sealed cushioned high pressure check valve of claim 1, wherein: The top sleeve groove (9) is a smooth cylindrical groove, the bottom end of the guide rod (10) is provided with a guide cone head, the upper part of the valve rod (7) is provided with a sealing ring groove (21), the sealing ring groove (21) is provided with an elastic sealing ring (22), and the outer circumference of the elastic sealing ring (22) is in abutment with the inner side wall of the top sleeve groove (9).

5. The sealed cushioned high pressure check valve of claim 1, wherein: The upper part of the valve body (1) is provided with a limiting sliding groove (18), the top sleeve groove (9) is slidingly arranged in the limiting sliding groove (18), the inner side wall of the limiting sliding groove (18) is provided with an elastic buffer sleeve (23), the elastic buffer sleeve (23) is sleeved on the outer side of the top sleeve groove (9), and the outer side of the top sleeve groove (9) is a smooth straight surface.

6. The sealed cushioned high pressure check valve of claim 1, wherein: The opening bottom of the valve seat (4) is provided with a structure reinforcing convex ring (19) extending downward, the structure reinforcing convex ring (19) and the valve seat (4) are an integral structure, the inner diameter of the structure reinforcing convex ring (19) gradually increases from bottom to top, the thickness of the structure reinforcing convex ring (19) gradually increases from bottom to top, and the top inner diameter of the structure reinforcing convex ring (19) is the same as the opening diameter of the valve seat (4).

7. The sealed cushioned high pressure check valve of claim 1, wherein: The liquid inlet cavity (2) and the liquid outlet cavity (3) are provided with fixed flanges outside the openings, and a plurality of fixed threaded holes are uniformly arranged on the fixed flanges.

8. The sealed cushioned high pressure check valve of claim 1, wherein: The bottom center of the valve clack body (5) is provided with a conical groove (20), the axis line of the conical groove (20) and the valve clack body (5) are located on the same straight line, the bottom opening diameter of the conical groove (20) is smaller than the opening diameter of the valve seat (4), and the inner side of the conical groove (20) is uniformly provided with a wear-resistant and corrosion-resistant coating.

9. The sealed cushioned high pressure check valve of claim 1, wherein: The pressure sensor (6) is provided in a plurality of numbers, and is uniformly embedded in the bottom edge of the valve clack body (5). The bottom surface of the pressure sensor (6) is in contact with the top surface of the valve seat (4).

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