Pressure release valve capable of achieving two-way pressure adjustment

Abstract

The utility model relates to the technical field of valve bodies, in particular to a pressure release valve capable of adjusting pressure bidirectionally, which comprises a main body, an upper cover is sleeved and screwed at the top end of the main body, a pressure release key base is inserted on the top surface of the upper cover, a pressure release key upper cover is screwed at the top end of the pressure release key base, and an inner core main body is inserted inside the main body. A low-temperature-resistant flat gasket is clamped between the inner core main body and the pressure relief key upper cover, an inner core column is inserted into the inner core main body, a pressure relief nut is in threaded connection with the bottom end of the inner core column, a second stainless steel spring is arranged between the pressure relief nut and the inner core main body, and a pressure inlet nut is in threaded connection with the bottom end of the main body in an inserted mode; the pressure release valve capable of adjusting the pressure in the two directions has the advantages of being novel in structure and easy and convenient to produce and machine; certain required pressure can be kept in the equipment and various cavity shells, and the internal pressure can be automatically adjusted and kept balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a pressure relief valve capable of bidirectionally regulating pressure. Background Art

[0002] The pressure relief valve is a pressure control device widely used in petrochemical, electric power, steel, fertilizer and other industries. Its main function is to protect the medium pressure in the equipment below the set value to prevent accidents caused by excessive pressure. Once the pressure drops to a safe range, the pressure relief valve will automatically close to prevent the medium from continuing to lose;

[0003] In the prior art, when the pressure in a device or pipeline exceeds a set safety pressure threshold, the pressure relief valve will automatically open and discharge the excess medium out of the system through an overflow channel to keep the system pressure within a safe range; however, the traditional pressure relief valve is not convenient for automatic adjustment and maintaining internal pressure balance as well as manual pressure relief functions.

[0004] Therefore, we need a bidirectional pressure-adjustable pressure relief valve to solve the problem that the existing pressure relief valve is not convenient for automatic adjustment and maintaining internal pressure balance and manual pressure relief function; it can allow the equipment and various cavity shells to maintain a certain required pressure, and can automatically adjust and maintain internal pressure balance. Utility Model Content

[0005] The purpose of the utility model is to provide a bidirectional pressure-adjustable pressure relief valve to solve the problem that the existing pressure relief valves mentioned in the above background technology are not convenient for automatic adjustment and maintaining internal pressure balance and manual pressure relief function; it can allow the equipment and various cavity shells to maintain a certain required pressure, and can automatically adjust and maintain internal pressure balance.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bidirectional pressure-adjustable pressure relief valve, comprising a main body, a top cover is sleeved on the top of the main body, a pressure relief key base is inserted into the top surface of the upper cover, the top of the pressure relief key base is screwed onto the pressure relief key upper cover, an inner core main body is inserted into the interior of the main body, a low-temperature resistant flat gasket is clamped between the inner core main body and the pressure relief key upper cover, an inner core column is inserted into the interior of the inner core main body, a pressure relief nut is screwed onto the bottom end of the inner core column, two stainless steel springs are arranged between the pressure relief nut and the inner core main body, a pressure inlet nut is screwed onto the bottom end of the main body, a stainless steel spring is arranged between the pressure inlet nut and the inner core main body, a low-temperature resistant O-ring and a nut are sleeved on the outer side of the main body, and the nut clamps the low-temperature resistant O-ring.

[0007] Preferably, a partition is integrally formed on the inner ring surface of the top end of the main body, and the partition is a circular plate-like structure. A pressure strip 1 is integrally formed on the bottom surface of the partition, and the pressure strip is a circular plate-like structure. The pressure strip 1 is used to clamp the low-temperature resistant flat pad.

[0008] Preferably, the outer ring surface of the top end of the main body is provided with an external thread, the upper cover is a circular ring structure with a "convex"-shaped circular opening as the inner ring surface, the inner ring surface of the bottom end of the upper cover is provided with an internal thread, the internal thread and the external thread are matched and connected, a plurality of circular holes are opened on the top surface of the upper cover, and the plurality of circular holes are arranged and distributed with the top inner ring opening of the upper cover as the central axis, and a surrounding plate is integrally formed on the top surface of the upper cover, and the surrounding plate is a circular arc plate-like structure, and two surrounding plates are provided, and the two surrounding plates are symmetrically distributed about the center of the top surface of the upper cover.

[0009] Preferably, the pressure relief key base is inserted into the inner ring opening of the upper cover, and a retaining ring is integrally formed on the outer ring surface of the upper cover, and the retaining ring is located below the top plate of the upper cover. The inner ring surface of the pressure relief key base is provided with an internal thread, and the pressure relief key upper cover is a "T"-shaped cylindrical structure. The rod body of the pressure relief key upper cover is provided with an external thread, and the external thread and the internal thread are matched and connected, and the pressure relief key base is pressed on top of the inner core column.

[0010] Preferably, the outer ring surface of the main body is integrally formed with a hexagonal ring plate, and a groove is provided on the bottom surface of the hexagonal ring plate. After the low-temperature resistant O-ring is sleeved on the main body, one side of the low-temperature resistant O-ring is pushed into the groove, and the outer ring surface of the bottom end of the main body is provided with an external thread. The nut sleeve is threaded on the bottom end of the main body, and the nut clamps the low-temperature resistant O-ring to produce elastic deformation.

[0011] Preferably, the inner core body is in the form of a "concave" shaped circular ring frame structure, the inner core column passes through the inner ring surface of the inner core body, the bottom surface of the top plate of the inner core column is integrally formed with a pressure strip 2, the pressure strip 2 extrude the low-temperature resistant flat pad, a stainless steel spring 1 is inserted into the groove body of the inner core body, the bottom end of the stainless steel spring 1 overlaps the pressure inlet nut, the pressure inlet nut is in the form of a circular ring plate with an inverted "convex" shaped circular opening as the inner ring opening, the outer ring surface of the pressure inlet nut is provided with an external thread, the inner ring surface of the bottom end of the main body is provided with an internal thread, and the internal thread and the external thread are matched and connected.

[0012] Preferably, the bottom end of the inner core column is provided with an external thread, the inner core body is sleeved and threaded on the bottom end of the inner core column, the pressure relief nut is a "convex" shaped ring, the second set of stainless steel springs is arranged on the top sleeve of the pressure relief nut, and the second stainless steel spring is clamped between the top surface of the bottom plate of the pressure relief nut and the top surface of the groove body of the inner core body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The pressure relief valve with bidirectional pressure adjustment proposed by the utility model has a novel structure and is easy to produce and process. It can keep a certain required pressure in the equipment and various cavity shells, and can automatically adjust and keep the internal pressure balanced. It also has a manual pressure relief function. This pressure relief valve can adjust different intake pressures and pressure relief pressures according to different customer needs when it leaves the factory. It has a wide range of applications, high functional reliability, and can be reused. It further solves the problem that the existing pressure relief valve is not easy to automatically adjust and keep the internal pressure balanced and has a manual pressure relief function. It can keep a certain required pressure in the equipment and various cavity shells, and can automatically adjust and keep the internal pressure balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a front view of the structure of the utility model;

[0017] Figure 3 for Figure 2 Structural cross-section at AA in the middle;

[0018] Figure 4 This is a schematic diagram of the exhaust pressure balance structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the intake pressure balance structure of the utility model;

[0020] Figure 6 It is a schematic diagram of the explosion structure of the utility model.

[0021] In the figure: pressure relief key cover 1, pressure relief key base 2, cover 3, main body 4, low temperature resistant O-ring 5, nut 6, stainless steel spring 1 7, pressure inlet nut 8, inner core column 9, low temperature resistant flat washer 10, inner core main body 11, stainless steel spring 2 12, pressure relief nut 13. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 6The utility model provides a technical solution: a bidirectional pressure-adjustable pressure relief valve, comprising a main body 4, the top of the main body 4 is sleeved with a cover 3 threadedly connected, the top outer ring surface of the main body 4 is provided with an external thread, the cover 3 is a circular ring structure with a "convex"-shaped circular opening on the inner ring surface, the bottom inner ring surface of the cover 3 is provided with an internal thread, the internal thread and the external thread are matched and connected, a plurality of circular holes are opened on the top surface of the cover 3, and the plurality of circular holes are arranged and distributed with the top inner ring opening of the cover 3 as the central axis, and a surrounding plate is integrally formed on the top surface of the cover 3, the surrounding plate is a circular arc plate-shaped structure, and the surrounding plate is provided with a plurality of circular holes. There are two of them, and the two enclosures are symmetrically distributed about the center of the top surface of the upper cover 3; a pressure relief key base 2 is inserted into the top surface of the upper cover 3, and the top of the pressure relief key base 2 is screwed with the pressure relief key upper cover 1, the pressure relief key base 2 is inserted into the inner ring mouth of the upper cover 3, and a retaining ring is integrally formed on the outer ring surface of the upper cover 3, and the retaining ring is located below the top plate of the upper cover 3, the inner ring surface of the pressure relief key base 2 is provided with an internal thread, the pressure relief key upper cover 1 is a "T"-shaped cylindrical structure, and an external thread is provided on the rod body of the pressure relief key upper cover 1, and the external thread and the internal thread are matched and connected, and the pressure relief key base 2 is pressed on top of the inner core column 9.

[0024] The outer ring surface of the main body 4 is integrally formed with a hexagonal ring plate, and a groove is opened on the bottom surface of the hexagonal ring plate. After the low-temperature resistant O-ring 5 is sleeved on the main body 4, one side of the low-temperature resistant O-ring 5 is pushed into the groove, and the outer ring surface of the bottom end of the main body 4 is provided with an external thread. The nut 6 is sleeved and threaded on the bottom end of the main body 4, and the nut 6 clamps the low-temperature resistant O-ring 5 to produce elastic deformation.

[0025] An inner core body 11 is inserted into the interior of the main body 4, and a low-temperature resistant flat gasket 10 is clamped between the inner core body 11 and the pressure relief key upper cover 1. A partition is integrally formed on the inner ring surface of the top end of the main body 4, and the partition is a circular ring-shaped plate structure. A pressure strip 1 is integrally formed on the bottom surface of the partition, and the pressure strip is a ring-shaped plate structure. The pressure strip 1 is used to clamp the low-temperature resistant flat gasket 10.

[0026] An inner core column 9 is inserted into the inner core body 11, and a pressure relief nut 13 is screwed on the bottom end of the inner core column 9, and a stainless steel spring 2 12 is provided between the pressure relief nut 13 and the inner core body 11, and a pressure inlet nut 8 is inserted and screwed on the bottom end of the main body 4, and a stainless steel spring 17 is provided between the pressure inlet nut 8 and the inner core body 11, and a low-temperature resistant O-ring 5 and a nut 6 are sleeved on the outer side of the main body 4, and the nut 6 clamps the low-temperature resistant O-ring 5; the inner core body 11 is a "concave"-shaped circular ring frame structure, the inner core column 9 runs through the inner ring surface of the inner core body 11, and a pressure strip 2 is integrally formed on the bottom surface of the top plate of the inner core column 9, and the pressure strip 2 squeezes the low-temperature resistant flat gasket 10, and a stainless steel spring 17 is inserted in the groove of the inner core body 11, and the bottom end of the stainless steel spring 17 is overlapped on the pressure inlet nut On the nut 8, the pressure inlet nut 8 is a circular ring plate with an inverted "convex" shaped inner ring opening. The outer ring surface of the pressure inlet nut 8 is provided with an external thread, and the inner ring surface of the bottom end of the main body 4 is provided with an internal thread, and the internal thread and the external thread are matched and connected; the bottom end of the inner core column 9 is provided with an external thread, and the inner core body 11 is sleeved and threaded on the bottom end of the inner core column 9, and the pressure relief nut 13 is a "convex" shaped ring, and the stainless steel spring 12 is sleeved on the top sleeve of the pressure relief nut 13, and the stainless steel spring 12 is clamped between the top surface of the bottom plate of the pressure relief nut 13 and the top surface of the groove body of the inner core body 11; the structure is novel and the production and processing are simple; it can allow the equipment to maintain a certain required pressure in various cavity shells, and can automatically adjust and maintain the internal pressure balance; and it has a manual pressure relief function. This pressure relief valve can adjust different intake pressures and pressure relief pressures according to different customer needs when leaving the factory; it has a wide range of applications, high functional reliability, and can be reused; it further solves the problem that existing pressure relief valves are not convenient for automatic adjustment and maintaining internal pressure balance and manual pressure relief functions; it can allow the equipment and various cavity shells to maintain a certain required pressure, and can automatically adjust and maintain internal pressure balance.

[0027] In actual use, the integrated air intake and pressure relief structure inside the two-way pressure regulating-pressure relief valve realizes the air intake, exhaust and pressure limiting functions. The manual pressure relief safety device ensures the safety of the equipment and extends the life of the equipment.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bidirectional pressure-adjustable pressure relief valve, comprising a main body (4), characterized in that: The top end of the main body (4) is sleeved with an upper cover (3) threadedly connected, the top surface of the upper cover (3) is plugged with a pressure relief key base (2), the top end of the pressure relief key base (2) is screwed with a pressure relief key upper cover (1), the interior of the main body (4) is plugged with an inner core main body (11), a low temperature resistant flat gasket (10) is clamped between the inner core main body (11) and the pressure relief key upper cover (1), an inner core column (9) is plugged into the interior of the inner core main body (11), a pressure relief nut (13) is screwed at the bottom end of the inner core column (9), a stainless steel spring 2 (12) is arranged between the pressure relief nut (13) and the inner core main body (11), a pressure inlet nut (8) is screwed at the bottom end of the main body (4), a stainless steel spring 1 (7) is arranged between the pressure inlet nut (8) and the inner core main body (11), a low temperature resistant O-ring (5) and a nut (6) are sleeved on the outer side of the main body (4), and the nut (6) clamps the low temperature resistant O-ring (5).

2. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The top inner ring surface of the main body (4) is integrally formed with a partition plate, the partition plate is a circular plate-shaped structure, and the bottom surface of the partition plate is integrally formed with a pressure strip 1, the pressure strip is a circular plate-shaped structure, and the pressure strip 1 is used to clamp the low-temperature resistant flat pad (10).

3. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The outer ring surface at the top of the main body (4) is provided with an external thread, the upper cover (3) is a circular ring structure with a "convex"-shaped circular opening on the inner ring surface, the inner ring surface at the bottom end of the upper cover (3) is provided with an internal thread, the internal thread and the external thread are connected in a cooperative manner, a plurality of circular holes are opened on the top surface of the upper cover (3), the plurality of circular holes are arranged and distributed with the inner ring opening at the top of the upper cover (3) as the central axis, the top surface of the upper cover (3) is integrally formed with a panel, the panel is a circular arc plate-like structure, two panels are provided, and the two panels are symmetrically distributed about the center of the top surface of the upper cover (3).

4. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The pressure relief key base (2) is inserted into the inner ring opening of the upper cover (3); a retaining ring is integrally formed on the outer ring surface of the upper cover (3); the retaining ring is located below the top plate of the upper cover (3); the inner ring surface of the pressure relief key base (2) is provided with an internal thread; the pressure relief key upper cover (1) is a "T"-shaped cylindrical structure; an external thread is provided on the rod body of the pressure relief key upper cover (1); the external thread and the internal thread are matched and connected; the pressure relief key base (2) is pressed on the top of the inner core column (9).

5. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The outer ring surface of the main body (4) is integrally formed with a hexagonal ring plate, and the bottom surface of the hexagonal ring plate is provided with a slot. After the low-temperature resistant O-ring (5) is sleeved on the main body (4), one side of the low-temperature resistant O-ring (5) is pushed into the slot. The outer ring surface of the bottom end of the main body (4) is provided with an external thread. The nut (6) is sleeved and threaded on the bottom end of the main body (4), and the nut (6) clamps the low-temperature resistant O-ring (5) to generate elastic deformation.

6. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The inner core body (11) is in the form of a "concave" shaped circular ring frame structure, the inner core column (9) penetrates the inner ring surface of the inner core body (11), the top plate bottom surface of the inner core column (9) is integrally formed with a second pressure strip, the second pressure strip extrude the low temperature resistant flat pad (10), a stainless steel spring (7) is inserted into the groove body of the inner core body (11), the bottom end of the stainless steel spring (7) is overlapped on the pressure nut (8), the pressure nut (8) is in the form of a circular ring plate with an inner ring opening in the form of an inverted "convex" shaped circular opening, the outer ring surface of the pressure nut (8) is provided with an external thread, the inner ring surface of the bottom end of the main body (4) is provided with an internal thread, and the internal thread and the external thread are matched and connected.

7. A bidirectional pressure-adjustable pressure relief valve according to claim 1, characterized in that: The bottom end of the inner core column (9) is provided with an external thread, the inner core body (11) is sleeved and threaded on the bottom end of the inner core column (9), the pressure relief nut (13) is in the shape of a "convex" circular ring, the second stainless steel spring (12) is sleeved on the top sleeve of the pressure relief nut (13), and the second stainless steel spring (12) is clamped between the top surface of the bottom plate of the pressure relief nut (13) and the top surface of the groove body of the inner core body (11).

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