Emergency release valve structure capable of quickly releasing pressure

Abstract

The invention relates to a safety valve. The invention relates to the technical field of balance valves, and discloses an emergency release valve structure capable of quickly releasing pressure, which comprises a connecting base, an outer shell is arranged on the upper side of the connecting base, a release valve seat is fixedly connected to the upper side of the connecting base, the lower side of the release valve seat extends out of the connecting base, the release valve seat is arranged in the outer shell, and the lower side of the release valve seat is fixedly connected with the outer shell. A sealing valve clack is arranged on the upper side of the discharging valve seat, a valve clack sealing body is arranged on the lower side of the sealing valve clack, a third connecting bolt is arranged on the upper side of the sealing valve clack, the sealing valve clack and the valve clack sealing body are connected together through the third connecting bolt, and six discharging mechanisms are arranged on the connecting base. The slideway type sealing valve clack device of the upper cavity opening in the release valve has a good dynamic structure and adapts to the application of fluid mechanics, and the sealing design is good in sealing effect and stable in sealing performance, so that the slideway type mechanical emergency release valve is stable in sealing performance and long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of safety valves and balancing valves, and in particular to an emergency relief valve structure capable of rapidly relieving pressure. Background Art

[0002] The emergency relief valve is a commonly used type of safety valve. When an emergency occurs, the emergency relief valve opens to release pressure in time to prevent the system from over-pressure and potential safety hazards. Under normal circumstances, the valve disc of the emergency relief valve is sealed on the valve body. In order to improve the sealing performance, a sealing ring is generally installed between the valve disc and the valve body. After long-term use, the sealing ring is prone to leakage, causing the medium in the system to leak out when the opening pressure of the emergency relief valve is not reached. When the pressure in the system reaches the opening pressure of the emergency relief valve, it is hoped that the emergency relief valve can be opened quickly to release pressure. However, in many cases, the emergency relief valve cannot be opened quickly, which is not conducive to rapid pressure relief. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the shortcomings of the prior art, the present invention provides an emergency relief valve structure that can quickly relieve pressure. The slide-type sealing valve disc device at the upper cavity mouth inside the relief valve has a good dynamic structure and is adaptable to the application of fluid mechanics. This sealing design has good sealing effect and stable sealing performance, so that the slide-type mechanical emergency relief valve has stable sealing performance and long service life.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an emergency relief valve structure capable of rapid pressure relief, comprising a connecting base, an outer shell is arranged on the upper side of the connecting base, and a relief valve seat is fixedly connected to the upper side of the connecting base;

[0007] The lower side of the relief valve seat extends over the connection base, and the relief valve seat is disposed inside the outer shell;

[0008] A sealing valve disc is arranged on the upper side of the discharge valve seat, a valve disc sealing body is arranged on the lower side of the sealing valve disc, and a third connecting bolt is arranged on the upper side of the sealing valve disc;

[0009] The lower end of the third connecting bolt passes through the sealing valve disc and the valve disc sealing body, and the sealing valve disc and the valve disc sealing body are connected together by the third connecting bolt. Six discharge mechanisms are arranged on the connecting base, and the sealing valve disc can be controlled to perform discharge work through the six discharge mechanisms;

[0010] The discharge mechanism comprises a fixed block, a first connecting bolt, a fixed base, two second connecting bolts, a fixed slideway, a connecting slideway, a fixed sliding block and a connecting sliding block.

[0011] Preferably, the connection structures of the six discharge mechanisms are the same, and the six discharge mechanisms are arranged in a ring array.

[0012] Preferably, the fixing block is arranged on the upper side of the connecting base, the fixing block is arranged inside the external shell, and the fixing block is arranged on the front side of the discharge valve seat.

[0013] Preferably, the first connecting bolt is arranged on the upper side of the outer shell, and the lower end of the first connecting bolt extends into the interior of the outer shell;

[0014] The lower end thread of the first connecting bolt extends into the interior of the fixing block, and the outer shell and the fixing block are connected together by the first connecting bolt.

[0015] Preferably, the fixed base is arranged on the upper side of the connecting base, and the upper side of the fixed base is fixedly connected to the lower side of the fixed block.

[0016] Preferably, the two second connecting bolts are both arranged on the upper side of the second connecting bolt, and the two second connecting bolts are respectively arranged on the left and right sides of the fixing block;

[0017] The lower ends of the two second connecting bolts extend out of the fixing base and the connecting base, and the fixing base and the connecting base are connected together through the two second connecting bolts.

[0018] Preferably, the fixed slideway is provided inside the fixed block, and the connecting slideway is provided on the front side of the fixed block;

[0019] The rear wall of the connecting slide extends into the interior of the fixed slide, and the rear wall of the connecting slide extends out of the fixed block.

[0020] Preferably, the fixed slider is slidably connected to the inside of the fixed slideway, the connecting slider is fixedly connected to the rear side of the fixed slider, and the rear side of the connecting slider is fixedly connected to the outer surface of the second connecting bolt.

[0021] Preferably, the upper sealing portion of the relief valve seat adopts a contact surface line sealing design with a 90° inner and outer R arc opening and a width of 1 to 3 mm.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides an emergency relief valve structure capable of rapid pressure relief, which has the following beneficial effects:

[0024] (1) The structure of the emergency relief valve capable of rapid pressure relief is that when the pressure in the tank exceeds the designed safety pressure, the sealing valve disc is compressed and loses balance, and leaves the sealing position of the relief valve seat. The sealing valve disc drives the valve disc sealing body to move upward at the same time, and the sealing valve disc drives the connecting slider and the fixed slider to move synchronously at the same time, so that the matching seal between the sealing surface of the valve disc sealing body and the sealing surface of the relief valve seat is released, and the medium in the tank begins to be discharged to the outside. When the pressure in the tank drops to the designed value of the tank safety pressure, the slide-type sealing valve disc descends back to its original position along the slide under the force of gravity, and then the sealing valve disc, the valve disc sealing body, the fixed slider and the connecting slider all begin to reset, and then the sealing surface of the sealing valve disc and the sealing surface of the relief valve seat are matched and sealed again. In this way, the slide-type sealing valve disc device at the upper cavity mouth of the relief valve has a good dynamic structure and is suitable for the application of fluid mechanics. This sealing design has good sealing effect and stable sealing performance, so that the sealing performance of the slide-type mechanical emergency relief valve is stable and the service life is long.

[0025] (2) The structure of the emergency relief valve capable of rapid pressure relief has a relief valve seat with a 90° inner and outer R arc mouth with a 1-3mm wide contact surface line seal design at the upper sealing portion thereof. The sealing valve disc is designed by stamping a 1.5-2mm thick 06Cr19Ni10 plate using a mold. A valve disc sealing body is provided on the lower side of the sealing valve disc. The valve disc sealing body is designed by a 2mm thick non-asbestos sealing gasket. This sealing design has good sealing effect and stable sealing performance.

[0026] (3) The structure of the emergency relief valve capable of rapid pressure relief is such that the safety pressure design of the slideway-type emergency relief valve is 100% of the safety design pressure of the tank body, and the total mass of the valve disc sealing body is 80-95% of the discharge design pressure of the tank body.

[0027] (4) The structure of the emergency relief valve capable of rapid pressure relief, the slide-type emergency relief valve has a compact structure, a relatively high sensitivity, is not strictly restricted in its installation position, and has poor sensitivity to vibration, so it can be used in petroleum, chemical pipelines, and pressure vessels.

[0028] (5) The emergency relief valve structure capable of rapid pressure relief, the fixed slideway and the corresponding slideway structure design, the slideway type mechanical emergency relief valve has stable sealing performance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of an emergency relief valve capable of rapid pressure relief according to the present invention;

[0030] Figure 2 It is a schematic diagram of the cross-section connection structure of the external shell of the present invention;

[0031] Figure 3 for Figure 2 A magnified schematic diagram of point A;

[0032] Figure 4 It is a schematic diagram of the cross-sectional connection structure of the external housing and the fixing block of the present invention;

[0033] Figure 5 for Figure 4 A magnified schematic diagram of point A;

[0034] Figure 6 It is a schematic diagram of the cross-sectional connection structure of the discharge valve seat of the present invention.

[0035] In the figure: 1. connecting base; 2. external shell; 3. discharge valve seat; 4. fixing block; 5. first connecting bolt; 6. fixing base; 7. second connecting bolt; 8. sealing valve disc; 9. valve disc sealing body; 10. third connecting bolt; 11. fixing slide; 12. connecting slide; 13. fixing slider; 14. connecting slider. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 6The present invention provides a new technical solution: an emergency relief valve structure capable of rapid pressure relief, comprising a connecting base 1, an outer shell 2 being arranged on the upper side of the connecting base 1, a relief valve seat 3 being fixedly connected to the upper side of the connecting base 1, the lower side of the relief valve seat 3 extending over the connecting base 1, the relief valve seat 3 being arranged inside the outer shell 2, the upper side sealing portion of the relief valve seat 3 adopts a circular straight mouth 90° inner and outer R arc mouth middle width 1-3mm contact surface line sealing design, a sealing valve flap 8 is arranged on the upper side of the relief valve seat 3, and the sealing valve flap 8 adopts a thickness of 1.5-2mm The 06Cr19Ni10 plate is designed by die stamping. A valve disc sealing body 9 is arranged on the lower side of the sealing valve disc 8. The valve disc sealing body 9 is designed with a non-asbestos sealing gasket with a thickness of 2mm. This sealing design has good sealing effect and stable sealing performance. A third connecting bolt 10 is arranged on the upper side of the sealing valve disc 8. The lower end of the third connecting bolt 10 passes through the sealing valve disc 8 and the valve disc sealing body 9. The sealing valve disc 8 and the valve disc sealing body 9 are connected together by the third connecting bolt 10. Six discharge mechanisms are arranged on the connecting base 1. The sealing valve disc 8 can be controlled to discharge through the six discharge mechanisms. The connection structure of the six discharge mechanisms is the same, and the six discharge mechanisms are arranged in a ring array. The front discharge mechanism is described below as the main body. The discharge mechanism includes a fixed block 4, a first connecting bolt 5, a fixed base 6, two second connecting bolts 7, a fixed slide 11, a connecting slide 12, a fixed slider 13 and a connecting slider 14.

[0038] Further, the fixing block 4 is arranged on the upper side of the connecting base 1, the fixing block 4 is arranged inside the external shell 2, the fixing block 4 is arranged on the front side of the discharge valve seat 3, the first connecting bolt 5 is arranged on the upper side of the external shell 2, the lower end of the first connecting bolt 5 extends into the interior of the external shell 2, the lower end of the first connecting bolt 5 is threadedly extended into the interior of the fixing block 4, the external shell 2 and the fixing block 4 are connected together by the first connecting bolt 5, the fixing base 6 is arranged on the upper side of the connecting base 1, the upper side of the fixing base 6 is fixedly connected to the lower side of the fixing block 4, the two second connecting bolts 7 are both arranged on the upper side of the second connecting bolt 7, the two second connecting bolts 7 are respectively arranged on the left and right sides of the fixing block 4, and the lower ends of the two second connecting bolts 7 are respectively arranged on the left and right sides of the fixing block 4. A fixed base 6 and a connecting base 1 are extended from the end, and the fixed base 6 and the connecting base 1 are connected together by two second connecting bolts 7. A fixed slide 11 is opened inside the fixed block 4, and a connecting slide 12 is opened on the front side of the fixed block 4. The rear wall of the connecting slide 12 extends into the interior of the fixed slide 11, and the rear wall of the connecting slide 12 extends out of the fixed block 4. A fixed slider 13 is slidably connected to the interior of the fixed slide 11, and a connecting slider 14 is fixedly connected to the rear side of the fixed slider 13. The rear side of the connecting slider 14 is fixedly connected to the outer surface of the second connecting bolts 7. The sum of the weights of the sealing valve body of the slide type emergency relief valve is balanced with the normal design safety pressure in the tank body. At this time, the valve disc sealing body 9 is sealed in accordance with the sealing surface of the relief valve seat 3.

[0039] Furthermore, the slide type emergency relief valve is connected to the tank body, and the sum of the weights of the sealing valve body of the slide type emergency relief valve is balanced with the normal designed safety pressure in the tank body. At this time, the valve disc sealing body 9 is sealed in a matching manner with the sealing surface of the relief valve seat 3. When the pressure in the tank body exceeds the designed safety pressure, the sealing valve disc 8 is compressed and loses balance, and leaves the sealing position of the relief valve seat 3. The sealing valve disc 8 drives the valve disc sealing body 9 to move upward at the same time, and the sealing valve disc 8 drives the connecting slider 14 and the fixed slider 13 to move synchronously at the same time, so that the matching seal between the sealing surface of the valve disc sealing body 9 and the sealing surface of the relief valve seat 3 is released, and then the tank body The internal medium begins to be discharged to the outside. When the pressure in the tank body drops to the design value of the tank body's safety pressure, the slide-type sealing valve flap 8 returns to its original position along the slide due to gravity, and then the sealing valve flap 8, valve flap sealing body 9, fixed slider 13 and connecting slider 14 all begin to reset, and then the sealing surface of the sealing valve flap 8 re-matches the sealing surface of the relief valve seat 3 for sealing. In this way, the slide-type sealing valve flap 8 device at the upper cavity mouth of the relief valve has a good dynamic structure and is adapted to the application of fluid mechanics. This sealing design has good sealing effect and stable sealing performance, which makes the slide-type mechanical emergency relief valve have stable sealing performance and long service life.

[0040] Working principle: The slide type emergency relief valve is connected to the tank body, and the sum of the weights of the sealing valve body of the slide type emergency relief valve is balanced with the normal design safety pressure in the tank body. At this time, the valve disc sealing body 9 is sealed in a matching manner with the sealing surface of the relief valve seat 3. When the pressure in the tank body exceeds the design safety pressure, the sealing valve disc 8 is compressed and loses balance, and leaves the sealing position of the relief valve seat 3. The sealing valve disc 8 drives the valve disc sealing body 9 to move up at the same time, and the sealing valve disc 8 drives the connecting slider 14 and the fixed slider 13 to move synchronously, and then the matching seal between the sealing surface of the valve disc sealing body 9 and the sealing surface of the relief valve seat 3 is released, and then the medium in the tank body begins to be discharged to the outside. When the pressure in the tank body drops to the design value of the tank body safety pressure, the slide type sealing valve disc 8 is returned to its position along the slide by gravity, and then the sealing valve disc 8, the valve disc sealing body 9, the fixed slider 13 and the connecting slider 14 all begin to reset, and then the sealing surface of the sealing valve disc 8 is re-matched and sealed with the sealing surface of the relief valve seat 3.

[0041] 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. An emergency relief valve structure capable of rapid pressure relief, comprising a connecting base (1), an outer shell (2) being arranged on the upper side of the connecting base (1), and a relief valve seat (3) being fixedly connected to the upper side of the connecting base (1); The lower side of the discharge valve seat (3) extends over the connection base (1), and the discharge valve seat (3) is arranged inside the outer shell (2); A sealing valve disc (8) is arranged on the upper side of the discharge valve seat (3), a valve disc sealing body (9) is arranged on the lower side of the sealing valve disc (8), and a third connecting bolt (10) is arranged on the upper side of the sealing valve disc (8); The lower end of the third connecting bolt (10) passes through the sealing valve disc (8) and the valve disc sealing body (9), and the sealing valve disc (8) and the valve disc sealing body (9) are connected together by the third connecting bolt (10), characterized in that: The connection base (1) is provided with six discharge mechanisms, through which the sealing valve flap (8) can be controlled to perform a discharge operation; The discharge mechanism comprises a fixed block (4), a first connecting bolt (5), a fixed base (6), two second connecting bolts (7), a fixed slideway (11), a connecting slideway (12), a fixed slide block (13) and a connecting slide block (14).

2. The emergency relief valve structure capable of rapid pressure relief according to claim 1, characterized in that: The connection structures of the six discharge mechanisms are the same, and the six discharge mechanisms are arranged in a ring array.

3. The emergency relief valve structure capable of rapid pressure relief according to claim 2, characterized in that: The fixing block (4) is arranged on the upper side of the connection base (1), the fixing block (4) is arranged inside the external shell (2), and the fixing block (4) is arranged on the front side of the discharge valve seat (3).

4. The emergency relief valve structure capable of rapid pressure relief according to claim 3, characterized in that: The first connecting bolt (5) is arranged on the upper side of the outer shell (2), and the lower end of the first connecting bolt (5) extends into the interior of the outer shell (2); The lower end of the first connecting bolt (5) is threadedly extended into the interior of the fixing block (4), and the outer shell (2) and the fixing block (4) are connected together via the first connecting bolt (5).

5. The emergency relief valve structure capable of rapid pressure relief according to claim 4, characterized in that: The fixed base (6) is arranged on the upper side of the connecting base (1), and the upper side of the fixed base (6) is fixedly connected to the lower side of the fixed block (4).

6. The emergency relief valve structure capable of rapid pressure relief according to claim 5, characterized in that: The two second connecting bolts (7) are both arranged on the upper side of the second connecting bolt (7), and the two second connecting bolts (7) are respectively arranged on the left and right sides of the fixing block (4); The lower ends of the two second connecting bolts (7) extend out of the fixed base (6) and the connecting base (1), and the fixed base (6) and the connecting base (1) are connected together via the two second connecting bolts (7).

7. The emergency relief valve structure capable of rapid pressure relief according to claim 6, characterized in that: The fixed slideway (11) is opened inside the fixed block (4), and the connecting slideway (12) is opened on the front side of the fixed block (4); The rear wall of the connecting slide (12) extends into the interior of the fixed slide (11), and the rear wall of the connecting slide (12) extends out of the fixed block (4).

8. The emergency relief valve structure capable of rapid pressure relief according to claim 7, characterized in that: The fixed slide block (13) is slidably connected inside the fixed slideway (11), the connecting slide block (14) is fixedly connected to the rear side of the fixed slide block (13), and the rear side of the connecting slide block (14) is fixedly connected to the outer surface of the second connecting bolt (7).

9. The emergency relief valve structure capable of rapid pressure relief according to claim 8, characterized in that: The upper sealing portion of the discharge valve seat (3) adopts a contact surface line sealing design with a 90° inner and outer R arc opening and a width of 1 to 3 mm.

Images