High pressure super large flow water pressure safety valve

Abstract

This invention discloses a high-pressure, ultra-high-flow water pressure safety valve, aiming to solve the problems of easy seal damage, unstable guidance, insufficient flow, and limited pressure regulation in traditional mine water pressure safety valves. The technical solution includes: a valve body, a connector installed at the front end of the valve body, and a valve core disposed within the connector. The connector has a first central hole and a pressure relief hole communicating with the first central hole at its rear end. The valve core has a conical head for sealing the first central hole. A threaded sleeve is connected to the rear end of the connector, and the threaded sleeve has a second central hole concentric with the first central hole. The front end of the conical head has a front guide post that guides and cooperates with the first central hole, and the rear end has a rear guide post that guides and cooperates with the second central hole. The side wall of the front guide post has at least three equally spaced arc grooves.

Description

Technical Field

[0001] This invention belongs to the field of valves, and in particular relates to a mine water pressure safety valve. Background Technology

[0002] In heavy-duty industrial applications such as hydraulic supports in mines and high-pressure fluid pipelines, safety valves, as core components for system overload protection, must simultaneously possess high-pressure load-bearing capacity, large-flow pressure relief, stable motion guidance, and long service life. Traditional high-pressure safety valves suffer from several technical defects in practical applications: 1. Traditional valve cores and threaded sleeves often use sealing rings for sealing. During frequent valve opening and closing, the seals are susceptible to wear and aging due to friction, impact, and fluid erosion, leading to seal failure and media leakage, shortening valve lifespan, and increasing maintenance costs. 2. Conventional valve cores lack a bidirectional stable guiding structure, making them prone to radial misalignment and motion jamming during opening and closing, resulting in uneven sealing surface contact, unstable pressure relief response, and the risk of system overpressure. 3. Traditional valve port flow structures are limited, with small effective flow area and high flow resistance, making it difficult to meet the requirements of large-flow, rapid pressure relief under high-pressure conditions, easily causing drastic pressure fluctuations. 4. Most safety valves use a single-spring pressure regulating structure, which cannot balance the initial pre-tightening fine-tuning accuracy and high-pressure bearing capacity. In addition, the valve core opening stroke is too large, the spring force changes significantly, the valve opening smoothness is poor, and the flow output stability is insufficient. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-pressure, ultra-large flow water pressure safety valve, which aims to solve the problems of easy seal damage, unstable guidance, insufficient flow, and single pressure regulation of traditional mine water pressure safety valves.

[0004] To solve the above problems, the technical solution adopted by the present invention includes: a valve body, a connector for mounting the front end of the valve body, and a valve core disposed in the connector. The connector has a first central hole and a pressure relief hole communicating with the first central hole at its rear end. The valve core has a conical head for sealing the first central hole. A threaded sleeve is connected to the rear end of the connector, and the threaded sleeve has a second central hole concentric with the first central hole. The front end of the conical head has a front guide post that guides and cooperates with the first central hole, and the rear end has a rear guide post that guides and cooperates with the second central hole. The side wall of the front guide post has at least three equally spaced arc grooves. A spring seat, a large spring, and a large pressure adjusting screw plug are sequentially disposed inside the valve body. A small spring is disposed concentrically inside the large spring, and a small pressure adjusting screw plug is disposed at the center of the large pressure adjusting screw plug. The spring seat applies pressure to the rear guide post through the elastic force of the large spring and the small spring.

[0005] A clearance is reserved between the valve core and the second center hole of the threaded sleeve.

[0006] The spring seat has an arc-shaped positioning groove at its front end center, and the rear guide post has an arc-shaped positioning surface at its front end that positions and cooperates with the arc-shaped positioning groove.

[0007] The small pressure adjusting plug and the large pressure adjusting plug are connected by a threaded connection. The compression of the small spring can be adjusted by rotating the small pressure adjusting plug.

[0008] The pressure relief holes are arranged in a circumferential manner at the rear end of the connector.

[0009] The arc groove forms a pressure-stabilizing cavity between the first central hole and the conical head.

[0010] The connector has a sealing ring at its front end.

[0011] The advantages of this high-pressure, ultra-high-flow water pressure safety valve are as follows: 1. The seal-free friction structure significantly extends service life. Eliminating the sealing ring between the valve core and the threaded sleeve avoids wear, aging, and failure of the seals, improving long-term operational reliability and reducing maintenance costs. 2. High coaxiality bidirectional guidance ensures stable operation. Precision guide pairs are formed at both ends of the valve core, ensuring smooth, unobstructed movement, uniform sealing, and rapid and reliable pressure relief response. 3. The arc-groove valve port significantly enhances flow capacity, optimizes the flow channel structure, reduces flow resistance, meets the demand for rapid pressure relief under high-pressure conditions, and reduces system pressure fluctuations. 4. Dual-spring graded pressure regulation balances accuracy and load-bearing capacity. The smaller spring handles fine setting, while the larger spring bears the high-pressure load. Combined with independent adjustment via dual plugs, it achieves stable control over a wide pressure range. The short-stroke opening reduces spring force fluctuations, ensuring smooth valve opening and closing and uniform flow output. 5. The media self-lubrication and cooling structure improves the performance of the moving parts. Combined with gap guidance, it achieves lubrication and heat dissipation, reducing friction, wear, and thermal impact, further improving valve stability and durability.

[0012] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is an exploded view of the high-pressure, ultra-high flow water pressure safety valve of the present invention; Figure 2 This is a cross-sectional view of the high-pressure ultra-large flow water pressure safety valve of the present invention; Figure 3 This is a schematic diagram of the valve core of the present invention. Detailed Implementation

[0014] Reference Figure 1-3As shown, the high-pressure ultra-large flow water pressure safety valve of the present invention includes a valve body 1, a connector 2 installed at the front end of the valve body 1, and a valve core 3 disposed within the connector 2. The connector 2 has a first central hole 4 and a pressure relief hole 5 communicating with the first central hole 4 at its rear end. The valve core 3 has a conical head 6 for sealing the first central hole 4. A threaded sleeve 7 is connected to the rear end of the connector 2, and the threaded sleeve 7 has a second central hole 8 concentric with the first central hole 4. The front end of the conical head 6 has a front guide post 9 that guides and cooperates with the first central hole 4, and the rear end has a rear guide post 10 that guides and cooperates with the second central hole 8. The side wall of the front guide post 9 has three equally spaced arc grooves 11. The valve body 1 is provided with a spring seat 12, a large spring 13, and a large pressure regulating plug 14 in sequence. The large spring 13 contains a concentrically arranged small spring 15, and the large pressure adjusting screw plug 14 has a small pressure adjusting screw plug 16 at its center. The spring seat 12 applies pressure to the rear guide post 10 through the elastic force of the large spring 13 and the small spring 15. The large pressure adjusting screw plug 14 is used to adjust the overall preload of the large spring 13 to determine the high-pressure load-bearing level of the valve. The small pressure adjusting screw plug 16 is used to adjust the preload of the small spring 15 to achieve precise setting of the initial opening pressure. The two work independently yet collaboratively to achieve graded control of "fine adjustment at low pressure and coarse adjustment at high pressure," balancing sealing reliability and high-pressure load-bearing capacity. During operation, when the system pressure is lower than the set value, the combined force of the large spring 13 and the small spring 15 presses the valve core 3, keeping the valve closed; when the system pressure exceeds the set value, the hydraulic pressure pushes the valve core 3 open, and the medium is quickly depressurized through the arc groove. The valve core 3 moves coaxially under bidirectional guidance and constraint, without deviation or jamming; the medium in the mating gap is continuously lubricated and cooled, reducing friction and temperature rise; the large pressure regulating screw plug 14 and the small pressure regulating screw plug 16 work together to adjust, which can realize a wide range of pressure settings and is suitable for various high pressure and high flow conditions.

[0015] Preferably, a clearance is provided between the valve core 3 and the second center hole 8 of the threaded sleeve 7. The medium flowing through the clearance can provide self-lubrication and cooling protection for the guiding movement of the valve core.

[0016] Preferably, the spring seat 12 has an arc-shaped positioning groove 17 at its front end center, and the rear guide post 10 has an arc-shaped positioning surface 18 at its front end that positions and cooperates with the arc-shaped positioning groove 17. This improves the accuracy and stability of the connection between the two.

[0017] Preferably, the small pressure adjusting plug 16 and the large pressure adjusting plug 14 are connected by a threaded connection, and the compression of the small spring 15 can be adjusted by rotating the small pressure adjusting plug 16.

[0018] Preferably, the pressure relief holes 5 are arranged in a circumferential manner at the rear end of the connector 2 to further improve the flow capacity.

[0019] Preferably, a pressure-stabilizing cavity 19 is formed between the arc groove 11, the first central hole 4, and the conical head 6. This increases the flow area, reduces flow resistance, and prevents pressure fluctuations.

[0020] Preferably, the front end of the connector 2 is provided with a sealing ring 20 to improve sealing performance.

[0021] As stated above, this is not intended to limit the present invention in any way. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-pressure and large-flow water pressure safety valve, comprising a valve shell (1), a joint (2) mounted at the front end of the valve shell (1), and a valve core (3) arranged in the joint (2), the joint (2) being provided with a first central hole (4) and a relief hole (5) at the rear end portion and in communication with the first central hole (4), and the valve core (3) being provided with a conical head (6) for plugging the first central hole (4), characterized in that: The connector (2) is connected to a threaded sleeve (7) at its rear end, and the threaded sleeve (7) is provided with a second central hole (8) concentric with the first central hole (4). The tapered head (6) is provided with a front guide post (9) that guides and cooperates with the first central hole (4) at its front end, and a rear guide post (10) that guides and cooperates with the second central hole (8) at its rear end. The side wall of the front guide post (9) is provided with at least three equally spaced arc grooves (11). The valve housing (1) is provided with a spring seat (12), a large spring (13) and a large pressure adjusting plug (14) in sequence. The large spring (13) is provided with a small spring (15) concentrically arranged. The center of the large pressure adjusting plug (14) is provided with a small pressure adjusting plug (16). The spring seat (12) applies pressure to the rear guide post (10) through the elastic force of the large spring (13) and the small spring (15). ​ 2. The high pressure, high flow, water pressure relief valve of claim 1, wherein: A clearance is reserved between the valve core (3) and the second center hole (8) of the threaded sleeve (7).

3. The high pressure, high flow, water pressure relief valve of claim 1, wherein: The spring seat (12) has an arc-shaped positioning groove (17) at the front center, and the rear guide post (10) has an arc-shaped positioning surface (18) at the front end that is positioned and cooperates with the arc-shaped positioning groove (17).

4. The high pressure, high flow, water pressure relief valve of claim 1, wherein: The small pressure adjusting plug (16) and the large pressure adjusting plug (14) are connected by a threaded connection. The compression of the small spring (15) can be adjusted by rotating the small pressure adjusting plug (16).

5. The high pressure, high flow, water pressure relief valve of claim 1, wherein: The pressure relief holes (5) are arranged in a circular pattern at the rear end of the connector (2).

6. The high pressure, high flow, water pressure relief valve of claim 1, wherein: The arc groove (11) forms a pressure stabilizing cavity (19) between the first central hole (4) and the conical head (6).

7. The high pressure, high flow, water pressure relief valve of claim 1, wherein: The connector (2) is provided with a sealing ring (20) at its front end.

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