Novel high-flow safety valve

Abstract

The utility model provides a novel high-flow safety valve, and belongs to the technical field of safety valves. The problems that an existing safety valve is complex in internal structure and prone to blockage are solved. The novel large-flow safety valve comprises a valve body with a cavity, a connector is arranged at the front end of the valve body, a pressure relief oil inlet hole is formed in the connector, an adjusting nut used for adjusting pressure is arranged at the rear end of the valve body, and a pressure relief assembly is arranged in the valve body and located between the connector and the adjusting nut. The pressure relief assembly is composed of a pressure spring, a pressure relief seat and a spring seat, an abutting portion is arranged at the front end of the pressure relief seat, the pressure relief seat divides the cavity into a pressure bearing bin and a movable bin allowing the pressure spring and the pressure relief seat to move, a pressure relief hole communicated with the pressure bearing bin is formed in the valve body, and a filter assembly is arranged on the connector and corresponds to the pressure relief oil inlet hole. The utility model has the advantage of anti-clogging.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety valves and relates to a safety valve, in particular to a novel large-flow safety valve. Background Art

[0002] A safety valve, also known as a relief valve, is a safety protection valve that is usually connected to high-pressure equipment or high-pressure pipelines such as high-pressure pumps and boilers. Under normal circumstances, the opening and closing parts on it are in a normally closed state due to external forces. When the medium pressure in the high-pressure equipment or pipeline increases and exceeds the specified value, it automatically opens. By discharging the medium outside the system, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value, thereby ensuring personal safety and safe operation of the equipment.

[0003] The existing safety valve has a complex internal structure and poor sealing effect, which can easily cause liquid to enter the interior of the safety valve and cause wear to its internal parts. In addition, the existing safety valve does not have a filtering effect, which causes impurities in the liquid to accumulate in the safety valve and cause blockage of the safety valve. Utility Model Content

[0004] The utility model aims to provide a novel large flow safety valve with anti-clogging function in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a new type of large-flow safety valve, including a valve body with a cavity, a joint is provided at the front end of the valve body, a pressure relief oil inlet hole is opened inside the joint, and it is characterized in that an adjusting nut for adjusting the pressure is provided on the rear end of the valve body, a pressure relief assembly is provided in the valve body and in the middle relative to the joint and the adjusting nut, the pressure relief assembly is composed of a pressure spring, a pressure relief seat and a spring seat, a supporting portion is provided at the front end of the pressure relief seat, the pressure relief seat divides the cavity into a pressure-bearing chamber and an active chamber for the pressure spring and the pressure relief seat to move, a pressure relief hole connected to the pressure-bearing chamber is opened on the valve body, and a filter assembly is provided on the joint and relative to the pressure relief oil inlet hole.

[0006] In the above-mentioned new type of large-flow safety valve, the filter assembly is composed of a filter screen, a protective cover and a magnet. The filter screen is provided with a magnetic core for mounting the magnet. The magnet is fixed to the magnetic core by a nut. The protective cover is arranged on the filter screen and is relative to the outside of the magnet and the magnetic core. The filter assembly is fixed to the joint by bolts.

[0007] In the above-mentioned novel large-flow safety valve, a connecting portion is provided on the valve body.

[0008] In the above-mentioned novel large flow safety valve, a sealing ring is arranged on the inner wall of the valve body and at the contact position with the pressure relief seat.

[0009] In the above-mentioned novel large flow safety valve, the abutting portion is configured in a conical shape.

[0010] Compared with the prior art, the utility model can adjust the pressure inside the safety valve according to actual needs through the adjusting nut. When the internal air pressure of the safety valve is 0, the pressure relief seat abuts against the pressure relief hole, and the abutting part abuts against the pressure relief oil inlet hole to prevent external dust from entering and clogging the safety valve when the safety valve is not operating. A filter assembly is provided at the pressure relief oil inlet to effectively filter out magnetic impurities and prevent impurities from entering the safety valve and causing clogging. The sealing ring increases the sealing performance of the valve body and the pressure relief seat to prevent oil from entering the pressure relief assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0012] Figure 2 It is a partial enlarged structural schematic diagram of the utility model.

[0013] In the figure, 1. cavity; 2. valve body; 3. joint; 4. pressure relief oil inlet hole; 5. adjusting nut; 6. pressure relief assembly; 7. pressure spring; 8. pressure relief seat; 9. spring seat; 10. abutment part; 11. pressure-bearing chamber; 12. movable chamber; 13. pressure relief hole; 14. filter assembly; 15. filter screen; 16. protective cover; 17. magnet; 18. magnetic core; 19. connecting part; 20. sealing ring. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1 , Figure 2 As shown, the new large-flow safety valve comprises a valve body with a cavity, a joint is provided at the front end of the valve body, a pressure relief oil inlet hole is opened inside the joint, an adjusting nut for adjusting the pressure is provided on the rear end of the valve body, a pressure relief assembly is provided in the valve body and in the middle relative to the joint and the adjusting nut, the pressure relief assembly is composed of a pressure spring, a pressure relief seat and a spring seat, a supporting portion is provided at the front end of the pressure relief seat, the pressure relief seat divides the cavity into a pressure-bearing chamber and a movable chamber for the pressure spring and the pressure relief seat to move, a pressure relief hole connected with the pressure-bearing chamber is opened on the valve body, and a filter assembly is provided on the joint and relative to the pressure relief oil inlet hole.

[0016] To further elaborate, the filter assembly is composed of a filter screen, a protective cover and a magnet. The filter screen is provided with a magnetic core for installing the magnet. The magnet is fixed to the magnetic core by a nut. The magnet can absorb impurities containing iron core to the protective cover. When the protective cover is removed for later cleaning, the iron-containing impurities that lose the magnetic attraction of the magnet will fall off, making cleaning more convenient. The protective cover is set on the filter screen and relative to the outside of the magnet and the magnetic core. The filter assembly is fixed to the joint by bolts.

[0017] To be more specific, a connecting portion is provided on the valve body.

[0018] To be more specific, a sealing ring is provided on the inner wall of the valve body and at the contact point with the pressure relief seat to prevent liquid from entering the pressure relief component and damaging it.

[0019] To be more specific, the abutting portion is conical and arranged such that when the safety valve is not in operation, the front end of the abutting portion abuts against the pressure relief oil inlet hole.

[0020] Working principle: When the safety valve is operating, the liquid enters the pressure chamber from the pressure relief oil inlet hole. As the pressure increases, the liquid pushes the pressure relief seat backward until the pressure relief hole is exposed on the pressure relief seat. The liquid flows out from the pressure relief hole to avoid excessive pressure.

[0021] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0022] Although this article uses more terms such as 1, cavity; 2, valve body; 3, joint; 4, pressure relief oil inlet hole; 5, adjusting nut; 6, pressure relief assembly; 7, pressure spring; 8, pressure relief seat; 9, spring seat; 10, abutment; 11, pressure chamber; 12, movable chamber; 13, pressure relief hole; 14, filter assembly; 15, filter screen; 16, protective cover; 17, magnet; 18, magnetic core; 19, connecting part; 20, sealing ring, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel large flow safety valve, comprising a valve body (2) with a cavity (1), a joint (3) being arranged at the front end of the valve body (2), a pressure relief oil inlet hole (4) being arranged inside the joint (3), characterized in that: An adjusting nut (5) for adjusting the pressure is arranged on the rear end of the valve body (2); a pressure relief assembly (6) is arranged in the valve body (2) and in the middle relative to the joint (3) and the adjusting nut (5); the pressure relief assembly (6) is composed of a pressure spring (7), a pressure relief seat (8) and a spring seat (9); a supporting portion (10) is arranged at the front end of the pressure relief seat (8); the pressure relief seat (8) divides the cavity (1) into a pressure-bearing chamber (11) and a movable chamber (12) for the pressure spring (7) and the pressure relief seat (8) to move; a pressure relief hole (13) connected to the pressure-bearing chamber (11) is opened on the valve body (2); and a filter assembly (14) is arranged on the joint (3) and relative to the pressure relief oil inlet hole (4).

2. A new type of large flow safety valve according to claim 1, characterized in that: The filter assembly (14) is composed of a filter screen (15), a protective cover (16) and a magnet (17); the filter screen (15) is provided with a magnetic core (18) for mounting the magnet (17); the magnet (17) is fixed to the magnetic core (18) by a nut; the protective cover (16) is arranged on the filter screen (15) and is located outside the magnet (17) and the magnetic core (18); and the filter assembly (14) is fixed to the joint (3) by bolts.

3. A new type of large flow safety valve according to claim 1, characterized in that: The valve body (2) is provided with a connecting portion (19).

4. A new type of large flow safety valve according to claim 1, characterized in that: A sealing ring (20) is provided on the inner wall of the valve body (2) at a position in contact with the pressure relief seat (8).

5. A new type of large flow safety valve according to claim 1, characterized in that: The abutting portion (10) is arranged in a conical shape.

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