Novel high-pressure one-way valve

Abstract

The utility model relates to the technical field of valves, in particular to a novel high-pressure one-way valve which comprises a valve body used for containing and fixing other parts. The oil inlet pipe is arranged on the valve body and used for guiding oil into the valve body; the oil outlet pipe is arranged on the valve body and used for guiding oil out of the valve body; the valve clack is movably arranged on the valve body and used for moving under the action of fluid pressure to open and close the valve, and the spring is arranged on the valve clack and used for providing pre-tightening force; the pressure buffering piece is arranged on the valve clack and used for reducing abrasion to the spring; the pressure buffering piece comprises a valve sleeve, a valve clack, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod and a pressure buffering part, and the valve clack is sleeved with the valve sleeve. The valve sleeve is fixedly connected with the valve body. The spring protection sleeve is sleeved on the outer side of the spring, the upper end of the spring protection sleeve is connected with the valve body in a sealing mode, the spring protection sleeve is connected with the valve clack through protruding threads on the outer wall, the spring protection sleeve is communicated with the outside, abrasion of pressure to the spring is reduced, and damage of the valve body to the spring when the valve body is used can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valves, in particular to a novel high-pressure check valve. BACKGROUND

[0002] The high-pressure check valve is also called a check valve or a non-return valve, and belongs to an automatic valve. The core function of the high-pressure check valve is to allow fluid to flow in one direction only. When fluid flows from an inlet to an outlet, a valve core is opened, and the fluid flows smoothly. When fluid attempts to flow back from the outlet to the inlet, the valve core is automatically closed to prevent the fluid from flowing back.

[0003] At present, a high-pressure check valve is provided in the Chinese utility model patent application No. CN202222833379.7. The high-pressure check valve comprises a valve body. A through hole is arranged on the valve body. The through hole comprises an end portion through hole and a middle portion through hole. A transition inclined surface is formed between the end portion through hole and the middle portion through hole. A valve core, an elastic member sleeved on the valve core, and a mounting seat connected with the valve body are arranged in the end portion through hole. The front end of the valve core is formed into a spherical surface or a circular truncated cone, and can abut against the transition inclined surface. An overload structure is arranged on the end face of the mounting seat away from the valve core. The overload structure can be inserted into the mounting seat to make the threaded connection structure between the mounting seat and the end portion through hole overload and deform, so that the rotation of the mounting seat can be limited. A plurality of flow channels are formed between the edge of the mounting seat and the valve body. The high-pressure check valve has large flow capacity, small pressure loss, and good use effect.

[0004] In the related art, the high-pressure check valve is repeatedly impacted by high-pressure medium, which causes the spring to be repeatedly compressed and directly exposed to the medium, and the risk of corrosion is high, thereby reducing the overall service life. In addition, the high-pressure check valve is an integral structure, and once the spring is damaged, the entire check valve needs to be discarded, thereby increasing the cost.

[0005] Therefore, it is necessary to provide a novel high-pressure check valve to solve the above problems. SUMMARY

[0006] The embodiment of the application provides a novel high-pressure check valve to solve the technical problems that the high-pressure medium repeatedly impacts the check valve, the spring is easily abraded, and the overall service life is reduced.

[0007] The embodiment of the application provides a novel high-pressure check valve, which comprises:

[0008] The valve body is used for accommodating and fixing other components.

[0009] The valve disc is movably arranged on the valve body and is used for moving under the action of fluid pressure, so that the valve is opened and closed.

[0010] A spring is arranged on the valve disc to provide a pre-tightening force to help the valve disc to better seal the fluid;

[0011] A pressure buffer is arranged on the valve disc to isolate the spring from the liquid medium in the valve body to avoid corrosion of the spring;

[0012] The pressure buffer comprises a valve sleeve, a spring protection sleeve, and a spring.

[0013] The valve sleeve is sleeved outside the valve disc and fixedly connected with the valve body, and the valve disc and the valve sleeve are allowed to communicate with each other.

[0014] The spring protection sleeve is sleeved with the spring, and the bottom end of the spring protection sleeve is sealed, and the upper end thereof is sealingly connected with the valve disc.

[0015] The technical scheme has at least the following technical effects: when the oil enters the valve body, a stepped pressure buffer is formed between the valve sleeve and the valve disc, and when the medium impacts the valve disc, a hydraulic damping layer is formed between the two side cavities between the valve disc and the spring protection sleeve, thereby significantly reducing the load borne by the spring.

[0016] The novel high-pressure one-way valve can disperse and absorb the energy generated when the medium impacts the valve disc through the pressure buffer and the Z-shaped flow channel, thereby significantly reducing the load borne by the spring, prolonging the service life of the spring, and blocking the direct contact between the medium and the spring, thereby avoiding corrosion of the spring by the medium.

[0017] In some embodiments, an oil inlet pipe is arranged on the valve body to guide the oil into the valve body, an oil outlet pipe is arranged on the valve body to guide the oil out of the valve body, a first shunt hole is formed in the valve sleeve, and a second shunt hole is formed in the valve disc.

[0018] In some embodiments, a valve cover is movably arranged on the valve body, and a cavity formed by the valve cover and the valve body is in communication with the spring protection sleeve.

[0019] In some embodiments, an air outlet hole is formed in the valve cover, and a filter screen is arranged on the air outlet hole.

[0020] In some embodiments, a top rod is arranged on the valve cover, a limiting member is arranged on the end of the top rod away from the valve cover, one end of the spring abuts against the valve disc, and the other end of the spring abuts against the limiting member.

[0021] In some embodiments, an annular protective ring is provided at the point where the valve disc abuts against the spring to reduce wear on the spring protective sleeve during compression.

[0022] In some embodiments, a valve seat is provided on the valve body, and the valve seat is movably and sealingly connected to the valve disc. Attached Figure Description

[0023] Figure 1 A three-dimensional structural schematic diagram of the novel high-pressure check valve provided in the embodiments of this application;

[0024] Figure 2 This is a cross-sectional structural diagram of the valve body provided in an embodiment of this application;

[0025] Figure 3 A cross-sectional structural diagram of the novel high-pressure check valve provided in this application embodiment;

[0026] Figure 4 A cross-sectional structural schematic diagram of the pressure buffer provided in the embodiments of this application;

[0027] The following are the labeling elements in the figure:

[0028] 1. Valve body; 11. Valve cover; 111. Vent hole; 112. Filter screen; 12. Oil inlet pipe; 13. Oil outlet pipe; 14. Valve seat; 15. Spring; 2. Pressure buffer; 21. Valve disc; 22. Valve sleeve; 23. First diversion hole; 24. Second diversion hole; 25. Spring protective sleeve; 26. Limiting element; 27. Push rod; 3. Annular protective ring. Detailed Implementation

[0029] Based on this, in order to improve the technical problem in the related technology that the high pressure medium repeatedly rushes through the one-way valve, causing the spring to wear easily and reducing the overall service life, the embodiments of this application provide the following solution.

[0030] Please refer to the following: Figures 1 to 4 This application provides a novel high-pressure check valve, which includes a valve body 1 for housing and fixing other components; an oil inlet pipe 12 disposed on the valve body 1 for guiding oil into the valve body 1; an oil outlet pipe 13 disposed on the valve body 1 for guiding oil out of the valve body 1; a valve disc 21 movably disposed on the valve body 1 for moving under fluid pressure to open and close the valve; a spring 15 disposed on the valve disc 21 for providing preload to help the valve disc 21 better seal the fluid; and a pressure buffer 2 disposed on the valve disc 21 for isolating the spring 15 from the liquid medium inside the valve body 1 to prevent corrosion of the spring 15.

[0031] In some embodiments, please refer to the following: Figures 2 to 4The pressure buffer 2 comprises a valve sleeve 22 sleeved outside the valve disc 21 and fixedly connected with the valve body 1, a spring protection sleeve 25 sleeved outside the spring 15, the upper end of which is sealingly connected with the valve body 1, the spring protection sleeve 25 is connected with the valve disc 21 through the outer wall protruding thread, the valve sleeve 22 is provided with a first shunt hole 23, the valve disc 21 is provided with a second shunt hole 24, the valve body 1 is movably provided with a valve cover 11, the cavity formed by the valve cover 11 and the valve body 1 is communicated with the spring protection sleeve 25, the valve cover 11 is provided with an air outlet hole 111, and the air outlet hole 111 is provided with a filter screen 112.

[0032] Thus, when the oil enters the valve body 1 through the oil inlet, the pressure is generated on the valve disc 21 to push the valve disc 21 upward, the liquid enters the gap between the valve sleeve 22 and the valve disc 21 through the first shunt hole 23 on the valve sleeve 22, and then enters the gap between the valve disc 21 and the spring protection sleeve 25 through the second shunt hole 24, thereby forming a stepped pressure buffer, when the medium impacts the valve disc 21, the liquid enters the two side cavities between the valve disc 21 and the spring protection sleeve 25 to form a hydraulic damping layer, thereby significantly reducing the load borne by the spring 15, the spring protection sleeve 25 is sealingly connected with the valve disc 21 to block the corrosion of the medium, and the gas in the spring protection sleeve 25 is discharged through the air outlet hole 111 on the valve cover 11 during the compression of the spring 15, and the external gas enters the spring protection sleeve 25 through the filter screen 112 to reduce the external dust entering the spring protection sleeve 25. Thus, through the design of the stepped pressure buffer and the hydraulic damping layer, the load borne by the spring 15 is significantly reduced, the spring 15 no longer directly bears the impact force of the medium, but disperses the impact energy through the hydraulic damping layer and the pressure buffer structure, thereby reducing the fatigue damage of the spring 15, and preventing the corrosion of the medium to the spring 15 itself, thereby prolonging the service life of the spring 15, the hydraulic damping layer can buffer the impact of the medium on the valve disc 21, the closing process of the valve disc 21 is more stable, and the collision and wear between the valve disc 21 and the valve seat 14 are reduced, meanwhile, the stepped pressure buffer also reduces the impact of the medium on the sealing element, which helps to maintain the good sealing performance of the sealing element and prolong the service life thereof, the hydraulic damping layer and the stepped pressure buffer structure can reduce the impact and wear of the medium on the sealing element, thereby ensuring that the sealing element maintains good sealing performance in long-term use, meanwhile, the threaded nesting structure of the spring protection sleeve 25 and the valve disc 21 further enhances the sealing effect, prevents the leakage of the medium, and buffers the impact force of the medium, so that the closing of the valve disc 21 is more stable, and the vibration and noise generated due to the impact of the medium and the rapid closing of the valve disc 21 are reduced.

[0033] In some embodiments, please refer to Figures 1 to 3The valve cover 11 is provided with a jacking rod 27, a limiting piece 26 is arranged on the end of the jacking rod 27 away from the valve cover 11, one end of the spring 15 abuts against the valve disc 21, the other end of the spring 15 abuts against the limiting piece 26, the valve disc 21 is provided with an annular protection ring 3 at the abutting position of the valve disc 21 and the spring 15, which is used to reduce the abrasion of the spring protection sleeve 25 by the spring 15 during compression, and the valve body 1 is provided with a valve seat 14, which is in movable sealing connection with the valve disc 21.

[0034] In this way, the annular protection ring 3 is arranged to reduce the abrasion of the spring protection sleeve 25 by the spring 15 at both ends during compression, and the jacking rod 27, the limiting piece 26 and the spring 15 can be taken down as a whole by only disassembling the valve cover 11 and rotating the limiting rod through the cooperation of the screw-type limiting device and the quick-release design of the valve cover 11 during maintenance of the spring 15, so that tool-free maintenance is realized, the service life of the spring 15 is ensured, replacement is facilitated, and maintenance cost is reduced. In this way, the annular protection ring can effectively reduce the abrasion of the spring protection sleeve 25 by the spring 15 at both ends during compression, this design avoids direct friction between the spring 15 and the protection sleeve through physical isolation, thereby prolonging the service life of the spring protection sleeve 25, further ensuring the operating environment of the spring 15, reducing the corrosion risk of the spring 15 due to damage of the protection sleeve, and through the screw-type limiting device and the quick-release design of the valve cover 11, the jacking rod 27, the limiting piece 26 and the spring 15 can be taken down as a whole by only disassembling the valve cover 11 and rotating the limiting rod when the user needs to maintain or replace the spring 15, which greatly simplifies the maintenance operation process. Since the maintenance operation is more convenient and fast, the service life is significantly improved, the maintenance experience is optimized, the maintenance cost is reduced, the system reliability is improved, and the user experience is improved. These designs not only improve the performance of the one-way valve itself, but also bring higher efficiency and lower operating cost to the entire system.

[0035] The implementation principle of the novel high-pressure one-way valve is as follows: when oil enters the inside of the valve body 1 through the oil inlet, pressure is generated on the valve disc 21, so that the valve disc 21 is pushed upward, liquid enters the gap between the valve sleeve 22 and the valve disc 21 through the first shunt hole 23 on the valve sleeve 22, enters the gap between the valve disc 21 and the spring protection sleeve 25 through the second shunt hole 24, and forms a stepped pressure buffer, when the medium impacts the valve disc 21, enters the two side cavities between the valve disc 21 and the spring protection sleeve 25 to form a hydraulic damping layer, significantly reduces the load borne by the spring 15, the spring protection sleeve 25 and the valve disc 21 are threadedly nested to form an isolation barrier, block the medium corrosion, the spring protection sleeve 25 discharges the gas in the spring protection sleeve 25 through the gas outlet hole 111 on the valve cover 11 in the compression process of the spring 15, the external gas reduces the dust entering the spring protection sleeve 25 through the filter screen 112, at the same time, the annular protection ring 3 reduces the wear of the spring protection sleeve 25 by the spring 15 at both ends in the compression process of the spring 15, in the process of needing to maintain the spring 15, through the cooperation of the screwing type limiting device and the quick release design of the valve cover 11, only the valve cover 11 needs to be disassembled and the limiting rod is rotated, so that the top rod 27, the limiting piece 26 and the spring 15 can be taken down as a whole, tool-free maintenance is realized, the service life of the spring 15 is ensured, replacement is facilitated, and maintenance cost is reduced.

[0036] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel high-pressure check valve, characterized in that... ,include: Valve body (1), used to accommodate and fix other components; The valve disc (21) is movably mounted on the valve body (1) and is used to move under the action of fluid pressure, thereby realizing the opening and closing of the valve; A spring (15) is provided on the valve disc (21) to provide preload force to help the valve disc (21) better seal the fluid; Pressure buffer (2) is installed on valve disc (21) to isolate spring (15) from liquid medium inside valve body (1) to prevent corrosion of spring (15); Among them, the pressure buffer (2) includes, A valve sleeve (22) is fitted over the outside of the valve disc (21) and is fixedly connected to the valve body (1), allowing liquid to flow between the valve disc (21) and the valve sleeve (22); A spring protective sleeve (25) is provided, in which the spring (15) is fitted and sealed at the bottom and at the top of the spring protective sleeve (25) and sealed to the valve disc (21). The spring protective sleeve (25) is in communication with the atmosphere, thereby reducing the obstruction to the movement of the spring (15).

2. The novel high-pressure check valve according to claim 1, characterized in that: The valve body (1) is provided with an oil inlet pipe (12) for guiding oil into the valve body (1); the valve body (1) is provided with an oil outlet pipe (13) for guiding oil out of the valve body (1); the valve sleeve (22) is provided with a first diversion hole (23), and the valve disc (21) is provided with a second diversion hole (24).

3. A novel high-pressure check valve according to claim 2, characterized in that: A valve cover (11) is movably disposed on the valve body (1), and the cavity formed by the valve cover (11) and the valve body (1) is connected to the spring protective sleeve (25).

4. A novel high-pressure check valve according to claim 3, characterized in that: The valve cover (11) is provided with an air outlet (111), and a filter screen (112) is provided on the air outlet (111).

5. A novel high-pressure check valve according to claim 4, characterized in that: A push rod (27) is provided on the valve cover (11). A limiting member (26) is provided on the end of the push rod (27) away from the valve cover (11). One end of the spring (15) abuts against the valve disc (21), and the other end of the spring (15) abuts against the limiting member (26).

6. A novel high-pressure check valve according to claim 5, characterized in that: An annular protective ring (3) is provided at the contact point between the valve disc (21) and the spring (15) to reduce the wear of the spring protective sleeve (25) by the spring (15) during compression.

7. A novel high-pressure check valve according to claim 6, characterized in that: The valve body (1) is provided with a valve seat (14), and the valve seat (14) is movably and sealingly connected to the valve disc (21).

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