An automatic overpressure relief device

Abstract

The present application relates to an automatic overpressure relief device, comprising: a valve body, a partition is provided inside the valve body, and a connecting pipe is sealed and plugged in the middle of the upper side of the valve body, a valve core mechanism is movably plugged in the connecting pipe, a pressure relief spring is fixedly connected between the upper end of the valve core mechanism and the upper end cover of the connecting pipe, and the lower end of the valve core mechanism is sealed and squeezed on the upper end of the pressure relief port opened in the middle of the partition; a protective mechanism, the protective mechanism is plugged in on the left side of the partition through a threaded seal, and an emergency pressure relief plate is provided in the middle of the protective mechanism; a liquid inlet pipe and a liquid outlet pipe are respectively provided at the left and right ends of the valve body, and a pressure gauge is plugged and connected to the liquid inlet pipe; a hollow cavity is opened on the lower middle side of the valve core mechanism, and a number of through holes are evenly opened on the side wall of the hollow cavity. The overall structure provided by the embodiment of the present application has a three-level protective pressure relief effect, thereby avoiding accidents caused by untimely pressure relief of the equipment connected to the liquid inlet pipe.

Description

Technical Field

[0001] The present application relates to the technical field of pressure relief gate valves, and in particular to an automatic overpressure relief device. Background Art

[0002] It can open and close automatically according to the working pressure of the system. It is usually installed on the equipment or pipelines of the closed system to protect the safety of the system. When the pressure in the equipment or pipeline exceeds the set pressure of the pressure relief valve, it will automatically open to relieve pressure, ensuring that the medium pressure in the equipment and pipeline is below the set pressure, protecting the equipment and pipeline and preventing accidents.

[0003] However, when ordinary automatic overpressure relief devices are used, the protection mechanism does not meet the requirements, and it is easy for the automatic overpressure relief device to fail to relieve pressure due to malfunction, resulting in accidents. Therefore, we proposed an automatic overpressure relief device. Summary of the invention

[0004] The present application provides an automatic overpressure relief device to solve the above-mentioned problems.

[0005] The present application provides an automatic overpressure relief device, comprising:

[0006] A valve body, wherein a partition is provided inside the valve body, and a connecting pipe is sealed and plugged in the middle of the upper side of the valve body, a valve core mechanism is movably plugged in the interior of the connecting pipe, a pressure relief spring is fixedly connected between the upper end of the valve core mechanism and the upper end cover plate of the connecting pipe, and the lower end of the valve core mechanism is sealed and squeezed against the upper end of the pressure relief port opened in the middle of the partition;

[0007] A protection mechanism, the protection mechanism is plugged into the left side of the partition through a threaded seal, and an emergency pressure relief plate is provided in the middle of the protection mechanism;

[0008] The left and right ends of the valve body are respectively provided with a liquid inlet pipe and a liquid outlet pipe, and a pressure gauge is plugged and connected to the liquid inlet pipe;

[0009] A hollow cavity is opened at the lower middle side of the valve core mechanism, a plurality of through holes are evenly opened at the side wall of the hollow cavity, a sealing plate is movably inserted in the interior of the hollow cavity, a transmission rod is fixedly connected to the upper end of the sealing plate, and a limit slider is also fixedly connected to the upper end of the transmission rod, a permanent magnet is arranged at the upper end of the limit slider, the limit slider is movably inserted in the limit cavity opened at the upper middle side of the valve core mechanism, and an electromagnet is fixedly connected to the upper end of the limit cavity;

[0010] The connecting pipe is provided with a spike obliquely at the lower outer portion of the valve body, and the end of the spike extends above the center line of the protection mechanism;

[0011] The protection mechanism includes a connecting shell, a fifth sealing ring, a connecting ring, a first positioning ring, a second positioning ring, positioning spikes and an emergency pressure relief plate. The connecting shell is threadedly inserted on the left side of the partition, the lower end of the connecting shell is fixedly connected to the connecting ring, the upper end of the connecting ring is fixedly connected to the outer side of the first positioning ring, the outer side of the first positioning ring is evenly provided with a plurality of positioning spikes, the outer side of the first positioning ring is sleeved with the second positioning ring, the inner side of the second positioning ring is fixedly connected with the emergency pressure relief plate, the upper outer part of the connecting shell and the extrusion surface of the partition are provided with a fifth sealing ring, the emergency pressure relief plate is an elastic rubber emergency pressure relief plate, and the thickness of the emergency pressure relief plate increases from the middle to the edge.

[0012] Preferably, the main body of the valve core mechanism is a cylindrical valve core, a plurality of first sealing rings are equidistantly sleeved on the upper outer side of the cylindrical valve core, an extrusion sealing ring is fixedly connected to the outer side of the lower end of the cylindrical valve core, a second sealing ring is recessed in the middle of the lower end of the extrusion sealing ring, and the outer surface of the cylindrical valve core is smooth.

[0013] Preferably, a third sealing ring is sleeved on the outer side of the limiting sliding block, and a fourth sealing ring is sleeved on the lower outer side of the sealing plate.

[0014] Preferably, a controller is fixedly connected to the outer side of the upper end of the valve body, and the controller is connected to a pressure gauge through a wire. The controller is also connected to a power supply and a backup power supply through a wire.

[0015] Preferably, the controller is connected to the electromagnet via a controllable switch.

[0016] Preferably, the upper end of the valve body is fixedly connected to a protective shell on the outside of the connecting pipe.

[0017] Preferably, the liquid inlet pipe is connected to the space at the lower end of the partition, and the liquid outlet pipe is connected to the space at the upper end of the partition.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] The overall structure provided by the embodiment of the present application is that when the first-level pressure relief occurs, the pressure connected to the liquid inlet pipe will push the valve core mechanism to move upward as a whole, thereby opening the pressure relief port and achieving the pressure relief effect; if the second-level pressure relief occurs, the controllable switch is opened to de-energize the electromagnet, so that the permanent magnet and the electromagnet will not produce repulsive force, so that the sealing plate will move upward, thereby connecting the hollow cavity with the lower space to achieve pressure relief; if the sealing plate is also stuck, the pressure at the liquid inlet pipe will continue to increase, thereby achieving the third-level pressure relief, so that the emergency pressure relief plate is subjected to force, and the various positioning spikes that jam the second positioning ring are all pulled off, so that the emergency pressure relief plate is detached, thereby achieving the pressure relief effect. The overall structure has a three-level protective pressure relief effect, thereby avoiding accidents caused by untimely pressure relief of equipment connected to the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 It is the overall structure diagram of the valve core mechanism of the present invention;

[0025] Figure 4 It is a cross-sectional view of the valve core mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle;

[0027] Figure 6 is a cross-sectional view of the protection mechanism of the present invention;

[0028] Figure 7 It is a circuit schematic diagram of the present invention.

[0029] In the figure: 1. valve body; 2. pressure gauge; 3. controller; 4. protective shell; 5. liquid outlet pipe; 6. liquid inlet pipe; 7. partition; 8. pressure relief port; 9. protective mechanism; 91. connecting shell; 92. fifth sealing ring; 93. connecting ring; 94. first positioning ring; 95. second positioning ring; 96. positioning thorn; 97. emergency pressure relief plate; 10. connecting pipe; 11. valve core mechanism; 111. cylindrical valve core; 112. first sealing ring; 113. through hole; 114. extrusion sealing ring; 115. sealing plate; 116. fourth sealing ring; 117. second sealing ring; 118. transmission rod; 119. permanent magnet; 110. electromagnet; 12. pressure relief spring; 13. limit cavity; 14. controllable switch; 15. third sealing ring; 16. hollow cavity; 17. spike; 18. power supply; 19. backup power supply; 20. limit slider. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0032] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc, or abc, where a, b, c can be single or plural, respectively.

[0033] like Figure 1-Figure 7 As shown: This embodiment of the application provides an automatic overpressure relief device, comprising:

[0034] A valve body 1, wherein a partition plate 7 is provided inside the valve body 1, and a connecting pipe 10 is sealed and plugged in the middle of the upper side of the valve body 1, a valve core mechanism 11 is movably plugged in the connecting pipe 10, a pressure relief spring 12 is fixedly connected between the upper end of the valve core mechanism 11 and the upper end cover plate of the connecting pipe 10, and the lower end of the valve core mechanism 11 is sealed and squeezed against the upper end of the pressure relief port 8 opened in the middle of the partition plate 7;

[0035] A protection mechanism 9, wherein the protection mechanism 9 is plugged into the left side of the partition 7 through a threaded seal, and an emergency pressure relief plate 97 is provided in the middle of the protection mechanism 9;

[0036] The left and right ends of the valve body 1 are respectively provided with a liquid inlet pipe 6 and a liquid outlet pipe 5, and a pressure gauge 2 is plugged and connected to the liquid inlet pipe 6;

[0037] A hollow cavity 16 is opened at the lower middle side of the valve core mechanism 11, and a plurality of through holes 113 are evenly opened on the side walls of the hollow cavity 16. A sealing plate 115 is movably inserted inside the hollow cavity 16, and a transmission rod 118 is fixedly connected to the upper end of the sealing plate 115, and a limit slider 20 is also fixedly connected to the upper end of the transmission rod 118. A permanent magnet 119 is provided at the upper end of the limit slider 20. The limit slider 20 is movably inserted into the limit cavity 13 opened at the upper middle side of the valve core mechanism 11, and an electromagnet 110 is fixedly connected to the upper end of the limit cavity 13.

[0038] Specifically: the liquid inlet pipe 6 is connected to the equipment that needs pressure relief, and the liquid outlet pipe 5 is connected to the equipment for liquid treatment after pressure relief, and the automatic overpressure relief device has a three-stage threshold trigger protection mechanism, which can be divided into primary pressure relief, secondary pressure relief and tertiary pressure relief, and the emergency situation increases in sequence;

[0039] When the first-stage pressure relief occurs, the pressure of the liquid inlet pipe 6 will push the valve core mechanism 11 to move upward as a whole, so that the pressure relief port 8 is opened, thereby achieving the pressure relief effect;

[0040] If a secondary pressure relief occurs, the controllable switch 14 is opened to de-energize the electromagnet 110, so that the permanent magnet 119 and the electromagnet 110 do not generate a repulsive force, so that the sealing plate 115 will move upward, so that the hollow cavity 16 is connected to the lower space, and the pressure is relieved;

[0041] If the sealing plate 115 also gets stuck, the pressure at the liquid inlet pipe 6 will continue to increase, thereby achieving third-level pressure relief, so that the emergency pressure relief plate 97 is stressed, and all the positioning spikes 96 that are stuck on the second positioning ring 95 are pulled off, so that the emergency pressure relief plate 97 is detached, thereby achieving the pressure relief effect.

[0042] The connecting pipe 10 is provided with a spike 17 at an angle on the lower outer side of the valve body 1 , and the end of the spike 17 extends to above the center line of the protection mechanism 9 .

[0043] Specifically, when the third-level pressure relief is reached, if it has not disengaged, the spike 17 will pierce the emergency pressure relief plate 97, thereby achieving pressure relief.

[0044] The protection mechanism 9 includes a connecting shell 91, a fifth sealing ring 92, a connecting ring 93, a first positioning ring 94, a second positioning ring 95, positioning spikes 96 and an emergency pressure relief plate 97. The connecting shell 91 is threadedly inserted on the left side of the partition 7. The lower end of the connecting shell 91 is fixedly connected with a connecting ring 93, and the outer side of the upper end of the connecting ring 93 is fixedly connected with a first positioning ring 94. A plurality of positioning spikes 96 are evenly arranged on the outer side of the first positioning ring 94. The outer side of the first positioning ring 94 is sleeved with the second positioning ring 95, and the inner side of the second positioning ring 95 is fixedly connected with an emergency pressure relief plate 97.

[0045] Specifically, the third level of pressure relief is achieved, so that the emergency pressure relief piece 97 is stressed, and all the positioning spikes 96 that are stuck on the second positioning ring 95 are pulled off, so that the emergency pressure relief piece 97 is detached, thereby achieving the pressure relief effect.

[0046] A fifth sealing ring 92 is provided on the extrusion surface between the upper outer side of the connecting shell 91 and the partition 7. The emergency pressure relief plate 97 is an elastic rubber emergency pressure relief plate. The thickness of the emergency pressure relief plate 97 increases from the middle to the edge.

[0047] Specifically, the elastic rubber emergency pressure relief sheet can buffer the unreachable threshold pressure, and when the emergency pressure relief sheet 97 reaches the third level of pressure relief and is not detached, the spike 17 will pierce the emergency pressure relief sheet 97, thereby achieving pressure relief.

[0048] like Figure 3 As shown: the main body of the valve core mechanism 11 is a cylindrical valve core 111, and a plurality of first sealing rings 112 are equidistantly sleeved on the upper outer side of the cylindrical valve core 111, and an extrusion sealing ring 114 is fixedly connected to the outer side of the lower end of the cylindrical valve core 111, and a second sealing ring 117 is recessed in the middle of the lower end of the extrusion sealing ring 114, and the outer surface of the cylindrical valve core 111 is smooth.

[0049] Specifically, the first sealing ring 112 can seal the movable part of the valve core mechanism 11 and the connecting pipe 10 .

[0050] like Figure 4 As shown, a third sealing ring 15 is sleeved on the outer side of the limiting slider 20 , and a fourth sealing ring 116 is sleeved on the lower outer side of the sealing plate 115 .

[0051] Specifically, the third sealing ring 15 serves to seal the limiting slider 20 , and the fourth sealing ring 116 serves to seal the sealing plate 115 .

[0052] like Figure 7 As shown: a controller 3 is fixedly connected to the outer side of the upper end of the valve body 1, and the controller 3 is connected to the pressure gauge 2 through a wire. The controller 3 is also connected to the power supply 18 and the backup power supply 19 through a wire.

[0053] Specifically: the controller 3, pressure gauge 2, power supply 18 and backup power supply 19 all use existing equipment on the market. The power supply 18 can use electricity provided by the power plant, and the backup power supply 19 can use power stored in a battery, which can avoid power loss of the electromagnet 110 caused by power outages.

[0054] like Figure 4 As shown: the controller 3 is connected to the electromagnet 110 via the controllable switch 14 .

[0055] Specifically, the electromagnet 110 adopts an existing electromagnet on the market, and a protective elastic layer may be connected to the lower end of the electromagnet 110 .

[0056] like Figure 1 and Figure 2 As shown: the upper end of the valve body 1 is fixedly connected to a protective shell 4 on the outside of the connecting pipe 10.

[0057] Specifically, the protective shell 4 can protect the connecting pipe 10 to prevent the connecting pipe 10 from being corroded by external air or rainwater.

[0058] like Figure 2 As shown: the liquid inlet pipe 6 is connected to the space at the lower end of the partition 7, and the liquid outlet pipe 5 is connected to the space at the upper end of the partition 7.

[0059] Specifically, the liquid inlet pipe 6 is connected to the equipment that needs to release pressure, and the liquid outlet pipe 5 is connected to the equipment for processing the liquid after the pressure release.

[0060] Principle of use: When the device is in use, the liquid inlet pipe 6 is connected to the device that needs pressure relief, and the liquid outlet pipe 5 is connected to the device that handles the liquid after pressure relief. The automatic overpressure relief device has a three-stage threshold trigger protection mechanism. The three-stage threshold can be divided into primary pressure relief, secondary pressure relief and tertiary pressure relief, and the emergency situation increases in sequence;

[0061] When the first-stage pressure relief occurs, the pressure of the liquid inlet pipe 6 will push the valve core mechanism 11 to move upward as a whole, so that the pressure relief port 8 is opened, thereby achieving the pressure relief effect;

[0062] If a secondary pressure relief situation occurs, that is, the automatic overpressure relief device has not been used for a long time, causing the pressure relief spring 12 or the valve core mechanism 11 to be stuck, causing the valve core mechanism 11 to be unable to move upward, and thus the valve core mechanism 11 cannot move upward to relieve pressure, when the pressure at the liquid inlet pipe 6 reaches the secondary pressure relief situation, the pressure gauge 2 will transmit data to the controller 3, so that the controllable switch 14 is turned on to de-energize the electromagnet 110, so that the permanent magnet 119 and the electromagnet 110 will not generate a repulsive force, so that the sealing plate 115 will move upward, so that the hollow cavity 16 is connected with the lower space, and the pressure is relieved;

[0063] If the sealing plate 115 is also stuck, the pressure at the liquid inlet pipe 6 will continue to increase, thereby achieving the third level of pressure relief, so that the emergency pressure relief sheet 97 is stressed, and all the positioning spikes 96 that are stuck to the second positioning ring 95 are pulled off, so that the emergency pressure relief sheet 97 is detached, thereby achieving the pressure relief effect;

[0064] The overall structure has a three-level protective pressure relief effect, thereby avoiding accidents caused by untimely pressure relief of the equipment connected to the liquid inlet pipe 6.

[0065] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. An automatic overpressure relief device, characterized in that: include: A valve body (1), wherein a partition (7) is provided inside the valve body (1), and a connecting pipe (10) is sealed and inserted in the middle of the upper side of the valve body (1), a valve core mechanism (11) is movably inserted in the interior of the connecting pipe (10), a pressure relief spring (12) is fixedly connected between the upper end of the valve core mechanism (11) and the upper end cover plate of the connecting pipe (10), and the lower end of the valve core mechanism (11) is sealed and pressed against the upper end of a pressure relief port (8) opened in the middle of the partition (7); A protection mechanism (9), the protection mechanism (9) being plugged into the left side of the partition plate (7) through a threaded seal, and an emergency pressure relief plate (97) being provided in the middle of the protection mechanism (9); The left and right ends of the valve body (1) are respectively provided with a liquid inlet pipe (6) and a liquid outlet pipe (5), and a pressure gauge (2) is plugged and connected to the liquid inlet pipe (6); A hollow cavity (16) is formed at the lower middle side of the valve core mechanism (11), and a plurality of through holes (113) are evenly formed on the side walls of the hollow cavity (16). A sealing plate (115) is movably inserted into the interior of the hollow cavity (16), and a transmission rod (118) is fixedly connected to the upper end of the sealing plate (115), and a limit slider (20) is also fixedly connected to the upper end of the transmission rod (118), and a permanent magnet (119) is provided at the upper end of the limit slider (20). The limit slider (20) is movably inserted into the interior of the limit cavity (13) formed at the upper middle side of the valve core mechanism (11), and an electromagnet (110) is fixedly connected to the upper end of the limit cavity (13); The connecting pipe (10) is provided with a spike (17) at an angle at the lower portion of the outer side of the valve body (1), and the end of the spike (17) extends above the center line of the protection mechanism (9); The protection mechanism (9) comprises a connecting shell (91), a fifth sealing ring (92), a connecting ring (93), a first positioning ring (94), a second positioning ring (95), a positioning spike (96) and an emergency pressure relief plate (97). The connecting shell (91) is inserted on the left side of the partition plate (7) by means of a thread. The lower end of the connecting shell (91) is fixedly connected to the connecting ring (93). The upper end of the connecting ring (93) is fixedly connected to the outer side of the first positioning ring (94). The outer side of the first positioning ring (94) is sleeved with the second positioning ring (95). The inner side of the second positioning ring (95) is fixedly connected to the emergency pressure relief plate (97). The fifth sealing ring (92) is provided on the upper part of the outer side of the connecting shell (91) and the extrusion surface of the partition plate (7). The emergency pressure relief plate (97) is an elastic rubber emergency pressure relief plate. The thickness of the emergency pressure relief plate (97) increases from the middle to the edge.

2. An automatic overpressure relief device according to claim 1, characterized in that: The main body of the valve core mechanism (11) is a cylindrical valve core (111); a plurality of first sealing rings (112) are sleeved equidistantly on the upper outer portion of the cylindrical valve core (111); an extrusion sealing ring (114) is fixedly connected to the outer side of the lower end of the cylindrical valve core (111); a second sealing ring (117) is recessed in the middle of the lower end of the extrusion sealing ring (114); and the outer surface of the cylindrical valve core (111) is smooth.

3. The automatic overpressure relief device according to claim 1, characterized in that: A third sealing ring (15) is sleeved on the outer side of the limiting sliding block (20), and a fourth sealing ring (116) is sleeved on the lower part of the outer side of the sealing plate (115).

4. The automatic overpressure relief device according to claim 1, characterized in that: A controller (3) is fixedly connected to the outer side of the upper end of the valve body (1); the controller (3) is connected to the pressure gauge (2) via a wire; the controller (3) is also connected to a power supply (18) and a backup power supply (19) via a wire.

5. The automatic overpressure relief device according to claim 4, characterized in that: The controller (3) is connected to the electromagnet (110) via a controllable switch (14).

6. The automatic overpressure relief device according to claim 1, characterized in that: The upper end of the valve body (1) is fixedly connected to a protective housing (4) on the outside of the connecting pipe (10).

7. The automatic overpressure relief device according to claim 1, characterized in that: The liquid inlet pipe (6) is in communication with the space at the lower end of the partition (7), and the liquid outlet pipe (5) is in communication with the space at the upper end of the partition (7).

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