Pressure relief valve and storage bin

Abstract

The utility model discloses a pressure relief valve and a storage bin. The pressure relief valve comprises a valve body component and a valve plate assembly. The valve body part is provided with an upper cavity and a lower cavity which are separated by a partition plate, the partition plate is provided with a first valve port, the upper cavity is communicated with the lower cavity through the first valve port, and the upper cavity is communicated with the outside; the valve plate assembly is movably connected with the partition plate through a connecting assembly, and the connecting assembly comprises an elastic assembly and is configured in the mode that when the pressure of the lower cavity exceeds a first set value or is lower than a second set value, under the pressure difference effect of the upper cavity and the lower cavity, the pressure of the upper cavity is larger than the first set value or is smaller than the second set value. The valve plate assembly can overcome the elastic force of the elastic assembly to move in the direction of opening the first valve port so as to communicate the upper cavity with the lower cavity. And when the pressure value of the lower cavity is within a preset range, the valve plate assembly is located at the position where the first valve port is closed so as to separate the upper cavity from the lower cavity. Through the structural arrangement of the pressure relief valve, the opening pressure of the valve port can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of release valves, and in particular to a pressure release valve and a storage bin. Background Art

[0002] A pressure relief valve is usually installed on the top of the silo (or ash bin). When the silo is filled or exhausted or abnormal temperature changes occur, the silo may be damaged by excessive positive pressure or excessive negative pressure. The setting of the pressure relief valve can ensure that the silo is not damaged by excessive positive or negative pressure.

[0003] During operation, when the pressure inside the silo exceeds the set value, the positive pressure valve plate of the pressure relief valve opens to release the excessive pressure in the silo or ash bin. When the negative pressure inside the silo exceeds the set value, the negative pressure valve plate of the pressure relief valve opens to add fresh air to the silo.

[0004] The existing pressure relief valve adjusts the pressure at which the valve opens by adjusting the counterweight, which is inconvenient to adjust. Utility Model Content

[0005] The purpose of the present application is to provide a pressure relief valve and a storage bin, wherein the structural arrangement of the pressure relief valve can conveniently adjust the pressure at which the valve port is opened.

[0006] In order to solve the above technical problems, the present application provides a pressure relief valve, comprising: a valve body component and a valve plate assembly;

[0007] The valve body component has an upper cavity and a lower cavity separated by a partition, the partition has a first valve port, the upper cavity is connected with the lower cavity through the first valve port, and the upper cavity is connected with the outside;

[0008] The valve plate assembly is movably connected to the partition through a connecting assembly, and the connecting assembly includes an elastic assembly and is configured as follows: when the pressure in the lower chamber exceeds a first set value or is lower than a second set value, under the action of the pressure difference between the upper chamber and the lower chamber, the valve plate assembly can overcome the elastic force of the elastic assembly and move in the direction of opening the first valve port to connect the upper chamber and the lower chamber; when the pressure value of the lower chamber is within a preset range, the valve plate assembly is in a position to close the first valve port to separate the upper chamber and the lower chamber.

[0009] In an achievable solution, the valve plate assembly includes a first valve plate and a second valve plate, and the connecting assembly includes a first connecting assembly and a second connecting assembly;

[0010] The first valve plate is connected to the partition plate through the first connecting assembly, and the second valve plate is connected to the first valve plate through the second connecting assembly;

[0011] The first valve plate has a second valve orifice. The first valve plate is located above the partition plate, and the second valve plate is located below the first valve plate;

[0012] The first valve plate and the second valve plate can move upward together to open the first valve orifice or move downward to close the first valve orifice;

[0013] The second valve plate can move downward relative to the first valve plate to open the second valve orifice or move upward to close the second valve orifice;

[0014] The second valve orifice is in an open state and is in communication with the first valve orifice.

[0015] In an implementable solution, the first connection assembly includes a plurality of first connection members, and the first connection member includes a first guide rod and a first elastic member;

[0016] The first guide rod is slidably disposed through the first valve plate and the partition plate. The extending direction of the first guide rod is parallel to the axial direction of the valve body component. The upper end of the first guide rod is connected with a first upper limit portion, and the lower end of the first guide rod is connected with a first lower limit portion. The first lower limit portion abuts against the lower end surface of the partition plate, and at least one of the first upper limit portion and the first lower limit portion is detachably connected to the first guide rod;

[0017] Two ends of the first elastic member respectively abut against the first upper limit portion and the first valve plate.

[0018] In an implementable solution, the second connection assembly includes a plurality of second connection members, and the second connection member includes a second guide rod and a second elastic member;

[0019] The second guide rod is slidably disposed through the first valve plate and the second valve plate. The extending direction of the second guide rod is parallel to the axial direction of the valve body component. The upper end of the second guide rod is connected with a second upper limit portion, and the lower end of the second guide rod is connected with a second lower limit portion. The second lower limit portion abuts against the lower end surface of the second valve plate, and at least one of the second upper limit portion and the second lower limit portion is detachably connected to the second guide rod;

[0020] Two ends of the second elastic member respectively abut against the second upper limit portion and the first valve plate.

[0021] In an implementable solution, the valve plate assembly is in a position where the first valve orifice is closed, and the second valve plate is located at the first valve orifice. In a projection plane perpendicular to the axial direction of the valve body component, the projection plane of the second valve orifice is located within the projection plane of the first valve orifice.

[0022] In an implementable solution, a first sealing ring is provided between the first valve plate and the partition plate; and / or, a second sealing ring is provided between the second valve plate and the first valve plate.

[0023] In an implementable solution, the pressure relief valve further includes a valve cover. The upper end of the valve body component is an open end communicating with the upper cavity, and the valve cover is used to block the open end.

[0024] The valve cover is hingedly connected to the valve body component. A support portion is further provided on the outer periphery of the valve body component. The support portion is located on a side away from the hinge joint between the valve cover and the valve body component. The support portion is used to support the valve cover. When the valve cover abuts against the support portion, there is a gap between the valve cover and the open end to enable the upper cavity to communicate with the outside.

[0025] In an implementable solution, a support is provided on the outer periphery of the valve body component. The support portion includes an adjusting rod and a limiting member. The adjusting rod is slidably connected to the support in the axial direction of the valve body component, and the limiting member is used to define the relative position of the adjusting rod and the valve body component.

[0026] In an implementable solution, the valve body component includes a first valve body and a second valve body. The first valve body is located above the second valve body. Both the first valve body and the second valve body are in a tubular structure. A first flange is provided on the outer periphery of the first valve body, and a second flange is provided on the outer periphery of the second valve body. The first flange and the second flange are fixedly connected; the partition plate is fixedly connected to the first valve body.

[0027] This application further provides a storage bin, which includes a bin body and a pressure relief valve installed on the top of the bin body. The pressure relief valve is the pressure relief valve described in any one of the above.

[0028] The pressure relief valve provided by this application can be used in a storage bin. In application, the pressure relief valve is installed on the top of the bin body of the storage bin; the pressure relief valve can adjust the opening pressure of the valve plate assembly by adjusting the elastic force of the elastic component to achieve the purpose of adjusting the pressure in the bin body of the storage bin. This adjustment method is more convenient compared with the existing counterweight adjustment. Brief Description of the Drawings

[0029] Figure 1 It is a schematic cross-sectional view of a pressure relief valve in an embodiment provided by this application;

[0030] Figure 2 is Figure 1 a partial enlarged view of part A in

[0031] Description of the Reference Numerals:

[0032] Valve body component 10, first valve body 11, first flange 111, second valve body 12, second flange 121, partition plate 13, first valve port 131, support 14, support part 15, adjusting rod 151, limiting part 152, upper cavity 101, lower cavity 102;

[0033] Valve plate assembly 20, first valve plate 21, second valve port 211, second valve plate 22, first sealing ring 231, second sealing ring 232;

[0034] First connecting component 31, first guide rod 311, first upper limiting part 312, first lower limiting part 313, first elastic part 314, second connecting component 32, second guide rod 321, second upper limiting part 322, second lower limiting part 323, second elastic part 324;

[0035] Valve cover 40, hinge 41. Specific implementation mode

[0036] In order to enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the accompanying drawings and specific implementation modes.

[0037] The upper and lower orientation words involved herein are defined based on the positions of the components in the drawings and the positional relationships between the components, only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the orientation words should not limit the protection scope of this application.

[0038] The first, second and other ordinal numbers involved herein are used to distinguish different components with the same name, and do not represent the primary-secondary relationship or the order of priority, etc.

[0039] Multiple as involved herein means more than two.

[0040] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic cross-sectional view of a pressure relief valve in an embodiment provided by this application, Figure 2 is Figure 1 a partial enlarged view of part A in

[0041] In this implementation mode, the pressure relief valve includes a valve body component 10 and a valve plate assembly 20.

[0042] The valve body component 10 has an upper cavity 101 and a lower cavity 102 separated by a partition plate 13. The partition plate 13 has a first valve port 131. The upper cavity 101 can communicate with the lower cavity 102 through the first valve port 131, and the upper cavity 101 communicates with the outside.

[0043] In application, when the pressure relief valve is installed at the top of the bin body of a storage bin (or ash silo), the lower cavity 102 of the pressure relief valve communicates with the inner cavity of the bin body.

[0044] The valve plate assembly 20 is movably connected to the partition 13 via a connecting assembly, which includes an elastic assembly and is configured as follows: when the pressure in the lower chamber 102 exceeds a first set value or is lower than a second set value, under the action of the pressure difference between the upper chamber 101 and the lower chamber 102, the valve plate assembly 20 can overcome the elastic force of the elastic assembly and move in the direction of opening the first valve port 131 to connect the upper chamber 101 and the lower chamber 102; when the pressure value of the lower chamber 102 is within a preset range, the valve plate assembly 20 is in a position to close the first valve port 131 to separate the upper chamber 101 and the lower chamber 102.

[0045] After adopting the above scheme, the pressure relief valve can adjust the opening pressure of the valve plate assembly 20 by adjusting the elastic force of the elastic assembly, so as to achieve the purpose of adjusting the pressure in the silo (or ash silo). Compared with the existing counterweight adjustment, this adjustment method is more convenient.

[0046] When the pressure value of the lower chamber 102 is within a preset range, the pressure difference force applied to the valve plate assembly 20 by the upper chamber 101 and the lower chamber 102 cannot overcome the elastic force of the elastic component, so that the valve plate assembly 20 cannot move and remains in the valve closing position. The preset range is related to the valve opening pressure setting of the valve plate assembly 20, and the valve opening pressure of the valve plate assembly 20 is related to the pre-pressure of the elastic component.

[0047] In one implementation, the valve plate assembly 20 includes a first valve plate 21 and a second valve plate 22, and the connecting assembly includes a first connecting assembly and a second connecting assembly.

[0048] The first valve plate 21 is connected to the partition plate 13 via a first connecting assembly, and the second valve plate 22 is connected to the first valve plate 21 via a second connecting assembly. The first valve plate 21 has a second valve port 211. The first valve plate 21 is located above the partition plate 13, and the second valve plate 22 is located below the first valve plate 21.

[0049] Through the arrangement of the first connecting assembly and the second connecting assembly, the first valve plate 21 and the second valve plate 22 can move up together to open the first valve port 131 or move down to close the first valve port 131, and the second valve plate 22 can move down relative to the first valve plate 21 to open the second valve port 211 or move up to close the second valve port 211.

[0050] When the second valve port 211 is in an open state, the second valve port 211 is communicated with the first valve port 131 . At this time, the lower chamber 102 can be communicated with the upper chamber 101 through the first valve port 131 and the second valve port 211 .

[0051] After the above settings, when the pressure in the inner cavity of the bin connected to the lower cavity 102 increases to exceed the first set value, the pressure applied by the lower cavity 102 to the valve plate assembly 20 is greater than the pressure applied by the upper cavity 101 to the valve plate assembly 20, forming an upward pressure difference acting on the valve plate assembly 20. This pressure difference can overcome the elastic force applied by the elastic component to the valve plate assembly 20, causing the first valve plate 21 and the second valve plate 22 to move upward together, opening the first valve port 131, enabling the upper cavity 101 and the lower cavity 102 to communicate, and the pressure in the inner cavity of the bin can be released to the outside until the pressure in the inner cavity of the bin drops below the first set value. Under the elastic restoring force of the elastic component, the first valve plate 21 and the second valve plate 22 move downward to the position where the first valve port 131 is closed, separating the upper cavity 101 and the lower cavity 102.

[0052] After the above settings, when the pressure in the inner cavity of the bin connected to the lower cavity 102 is lower than the atmospheric pressure, a vacuum is generated in the inner cavity of the bin, and when the pressure is lower than the second set value, the pressure applied by the upper cavity 101 to the valve plate assembly 20 is greater than the pressure applied by the lower cavity 102 to the valve plate assembly 20, forming a downward pressure difference acting on the valve plate assembly 20. The first valve plate 21 does not move due to the interference of the partition 13. This pressure difference can overcome the elastic force applied by the elastic component to the second valve plate 22, causing the second valve plate 22 to move downward relative to the first valve plate 21 to open the second valve port 211 of the first valve plate 21, enabling the second valve port 211 to communicate with the first valve port 131, so that the upper cavity 101 and the lower cavity 102 communicate, and the outside air can enter the inner cavity of the bin until the pressure in the inner cavity of the bin rises above the second set value. Under the elastic restoring force of the elastic component, the second valve plate 22 moves upward relative to the first valve plate 21 to close the second valve port 211, and returns to the position where it cooperates with the first valve plate 21 to close the first valve port 131, separating the upper cavity 101 and the lower cavity 102.

[0053] In a specific implementation, the first connection assembly includes a plurality of first connection parts 31, and the first connection part 31 includes a first guide rod 311 and a first elastic member 314. The plurality of first connection parts 31 are arranged along the circumference of the first valve plate 21, and the outer periphery of the first valve plate 21 is connected to the partition 13 through the plurality of first connection parts 31.

[0054] The first guide rod 311 is slidably disposed through the first valve plate 21 and the partition 13. The extending direction of the first guide rod 311 is parallel to the axis direction of the valve body member 10. The upper end of the first guide rod 311 is connected with a first upper limit portion 312, the lower end of the first guide rod 311 is connected with a first lower limit portion 313, and the first lower limit portion 313 abuts against the lower end surface of the partition 13; at least one of the first upper limit portion 312 and the first lower limit portion 313 is detachably connected to the first guide rod 311; both ends of the first elastic member 314 respectively abut against the first upper limit portion 312 and the first valve plate 21.

[0055] After the above settings, the first lower limit portion 313 abuts against the lower end surface of the partition plate 13, which can limit the relative position of the first guide rod 311 and the partition plate 13 in the axial direction of the valve body component 10. The first elastic member 314 is arranged between the first upper limit portion 312 and the first valve plate 21, and can apply an elastic force to the first valve plate 21 to press the first valve plate 21 against the partition plate 13 to ensure the sealing performance when the valve is closed. At the same time, the first guide rod 311 can slide relative to the first valve plate 21 and the partition plate 13, and the distance between the first upper limit portion 312 and the partition plate 13 can be adjusted by the sliding of the first guide rod 311, that is, the pre-pressure applied by the first elastic member 314 to the first valve plate 21 is adjusted, so as to realize the adjustment of the opening pressure of the valve plate assembly 20 for opening the first valve port 131.

[0056] In an implementation example, as Figure 2 shown, the first guide rod 311 and the first upper limit portion 312 can adopt a bolt structure. The head of the bolt serves as the first upper limit portion 312, and the rod portion of the bolt serves as the first guide rod 311. On this basis, the first lower limit portion 313 can be selected as a nut. The rod portion of the bolt passes through the first elastic member 314, the first valve plate 21 and the partition plate 13 in sequence, and after adjusting the relative position of the bolt and the partition plate 13, the position of the bolt is limited by the screw connection of the nut and the bolt.

[0057] In practical applications, it can also be that the first guide rod 311 and the first lower limit portion 313 adopt a bolt structure, and the first upper limit portion 312 adopts a nut, that is, the bolt in the figure is inverted so that the head of the bolt faces downward. After the rod portion of the bolt passes through the partition plate 13, the first valve plate 21 and the first elastic member 314 in sequence, a nut is screwed in, and the pre-pressure applied by the first elastic member 314 to the first valve plate 21 is adjusted by adjusting the distance between the nut and the partition plate 13.

[0058] In other implementation examples, the first guide rod 311, the first upper limit portion 312 and the first lower limit portion 313 can adopt a form of being assembled after being separated; the detachable connection manner between the first upper limit portion 312 and / or the first lower limit portion 313 and the first guide rod 311 can be other detachable connection manners in addition to the threaded connection in the foregoing examples.

[0059] Exemplarily, the first elastic member 314 can be selected as a spring.

[0060] In a specific implementation, the second connection assembly includes a plurality of second connection members 32, and the second connection member 32 includes a second guide rod 321 and a second elastic member 324. The plurality of second connection portions 32 are arranged along the circumferential direction of the second valve plate 22, and the outer periphery of the second valve plate 22 is connected to the partition plate 13 through the plurality of second connection portions 32.

[0061] The second guide rod 321 is slidably inserted into the first valve plate 21 and the second valve plate 22, and the extension direction of the second guide rod 321 is parallel to the axial direction of the valve body component 10. The upper end of the second guide rod 321 is connected with the second upper limit portion 322, and the lower end of the second guide rod 321 is connected with the second lower limit portion 323, and the second lower limit portion 323 abuts against the lower end surface of the second valve plate 22; at least one of the second upper limit portion 322 and the second lower limit portion 323 is detachably connected to the second guide rod 321; the two ends of the second elastic member 324 abut against the second upper limit portion 322 and the first valve plate 21 respectively.

[0062] After the above arrangement, the second lower limit portion 323 abuts against the lower end surface of the second valve plate 22. Combined with the arrangement of the second elastic member 324, when not subjected to external force, the fit between the first valve plate 21 and the second valve plate 22 can be ensured, ensuring that the second valve plate 22 can close the second valve port 211 of the first valve plate 21. At the same time, the cooperation of the first valve plate 21 and the second valve plate 22 can close the first valve port 131. The second guide rod 321 can slide relative to the first valve plate 21 and the second valve plate 22. The distance between the second upper limit portion 322 and the first valve plate 21 can be adjusted by sliding the second guide rod 321, that is, the pre-tightening force applied to the second valve plate 22 by the second elastic member 324 is adjusted, thereby realizing the adjustment of the valve opening pressure of the second valve plate 22 to open the second valve port 211.

[0063] In the illustrated example, the second guide rod 321 and the second upper limit portion 322 adopt a bolt structure, and the second lower limit portion 323 adopts a nut that can be threadedly connected with the bolt. The specific arrangement of the second guide rod 321, the second upper limit portion 322 and the second lower limit portion 323 can be similar to the arrangement of the first guide rod 311, the first upper limit portion 312 and the first lower limit portion 313, and will not be repeated here.

[0064] In one implementation, Figure 1 As shown, when the valve plate assembly 20 is in the position of closing the first valve port 131, the second valve plate 22 is located in the first valve port 131. At this time, the second valve plate 22 is in contact with the first valve plate 21, and the second valve plate 22 closes the second valve port 211 of the first valve plate 21; in the projection plane perpendicular to the axial direction of the valve body component 10, the projection plane of the second valve port 211 is located in the projection plane of the first valve port 131. In this way, when the second valve plate 22 moves downward relative to the first valve plate 21, it will not be interfered by the partition plate 13, and the second valve plate 22 can be in contact with the first valve plate 21 to close the second valve port 211, ensuring the reliability of the valve closing operation.

[0065] Exemplarily, the second elastic member 324 can be a spring.

[0066] In one implementation, a first sealing ring 231 is provided between the first valve plate 21 and the partition plate 13. In this way, the sealing performance between the first valve plate 21 and the partition plate 13 can be ensured when the valve is closed. At the same time, when the first valve plate 21 moves in the valve closing direction, that is, when the first valve plate 21 moves downward in the direction of the partition plate 13, it can avoid colliding with the partition plate 13.

[0067] In one implementation, a second sealing ring 232 is provided between the first valve plate 21 and the second valve plate 22. In this way, the sealing performance between the second valve plate 22 and the first valve plate 21 can be ensured when the valve is closed. At the same time, when the second valve plate 22 moves in the valve closing direction, that is, when the second valve plate 22 moves upward in the direction of the first valve plate 21, it can avoid colliding with the first valve plate 21.

[0068] In one implementation, the pressure relief valve further includes a valve cover 40. The upper end of the valve body component 10 is an open end communicating with the upper cavity 101, and the valve cover 40 is used to cover the open end; the valve cover 40 is hingedly connected to the valve body component 10. A support portion 15 is further provided on the outer periphery of the valve body component 10. The support portion 15 is located on one side away from the hinge joint of the valve cover 40 and the valve body component 10. The support portion 15 is used to support the valve cover 40. When the valve cover 40 abuts against the support portion 15, there is a gap between the valve cover 40 and the open end to enable the upper cavity 101 to communicate with the outside.

[0069] After the above arrangement, in the axial direction of the valve body component 10, the valve cover 40 can cover the open end of the valve body component 10, providing a certain protection for the pressure relief valve. When the valve cover 40 covers, through the support of the support portion 15, there is a gap in the vertical direction between the valve cover 40 and the open end, enabling the upper cavity 101 to communicate with the outside and ensuring the normal operation of the pressure relief valve.

[0070] In a specific implementation, the support portion 15 includes an adjusting rod 151 and a limiting member 152. A support 14 is provided on the outer periphery of the valve body component 10. The adjusting rod 151 is slidably connected to the support 14 in the axial direction of the valve body component 10, and the limiting member 152 is used to limit the relative position of the adjusting rod 151 and the valve body component 10. After such an arrangement, the height of the adjusting rod 151 can be adjusted by sliding the adjusting rod 151, so as to adjust the size of the gap between the valve cover 40 and the open end after the adjusting rod 151 supports the valve cover 40.

[0071] Exemplarily, the adjusting rod 151 can be a screw rod, and the limiting member 152 can be a nut threadedly engaged with the screw rod. The adjusting rod 151 is inserted into the support 14 and is threadedly connected to the support 14.

[0072] Exemplarily, the valve cover 40 can be hingedly connected to the valve body component 10 through a hinge 41.

[0073] In one implementation, the valve body component 10 includes a first valve body 11 and a second valve body 12. The first valve body 11 is located above the second valve body 12. Both the first valve body 11 and the second valve body 12 are tubular structures. A first flange 111 is provided on the outer periphery of the first valve body 11, and a second flange 121 is provided on the outer periphery of the second valve body 12. The first flange 111 and the second flange 121 are fixedly connected, so that the first valve body 11 and the second valve body 12 can be fixedly connected. The inner cavities of the first valve body 11 and the second valve body 12 are communicated, and the inner cavities of the two form the inner cavity of the valve body component 10.

[0074] In the illustrated example, the partition plate 13 is fixedly connected to the first valve body 11. It can be understood that the partition plate 13 is in the shape of an annular plate, and the through hole in the middle forms a first valve port 131. The outer peripheral wall of the partition plate 13 is fixedly connected to the inner peripheral wall of the first valve body 11, and welding can be used for fixation, which is reliable and simple.

[0075] In this way, the chamber of the first valve body 11 located above the partition plate 13 forms an upper chamber 101, and the chamber of the first valve body 11 located below the partition plate 13 and the inner cavity of the second valve body 12 form a lower chamber 102.

[0076] In other embodiments, the partition plate 13 can also be fixedly connected to the second valve body 12, or the partition plate 13 can be arranged at the junction of the first valve body 11 and the second valve body 12.

[0077] In other embodiments, the valve body component 10 can also be an integral structure.

[0078] The embodiment of the present application also provides a storage bin, which includes a bin body and a pressure relief valve installed on the top of the bin body. The pressure relief valve is the pressure relief valve introduced in the foregoing embodiment.

[0079] After the pressure relief valve is installed on the bin body of the storage bin, the lower chamber 102 of the pressure relief valve is communicated with the inner cavity of the bin body.

[0080] The working process of the pressure relief valve is as follows:

[0081] When the pressure in the silo increases to exceed the first set value, the pressure in the lower chamber 102 connected to the silo is greater than the external atmospheric pressure, forming an upward pressure differential force applied to the valve plate assembly 20. The pressure differential force can overcome the elastic force of the first elastic member 314, so that the second valve plate 22 pushes against the first valve plate 21, and the two move upward together. During the upward movement, the first valve plate 21 slides along the first guide rod 311 and compresses the first elastic member 314, opening the first valve port 131, so that the upper chamber 101 and the lower chamber 102 are connected, and the pressure in the silo can be released to the outside. After the release, the pressure in the silo drops. When the pressure in the silo drops below the first set value, under the elastic reset force of the first elastic member 314, the first valve plate 21 and the second valve plate 22 move downward together to the position of closing the first valve port 131. It can be understood that the first set value is related to the pre-compression force of the first elastic member 314, and can be adjusted as needed in actual applications.

[0082] When the pressure in the bin is lower than the atmospheric pressure, a vacuum is generated in the bin. When the pressure value in the bin (also referred to as the vacuum value) is lower than the second set value, the pressure applied to the valve plate assembly 20 by the upper chamber 101 is greater than the pressure applied to the valve plate assembly 20 by the lower chamber 102, forming a downward pressure differential force applied to the valve plate assembly 20. Since the first valve plate 21 is in contact with the partition 13, the first valve plate 21 does not move at this time. The pressure differential force can overcome the elastic force of the second elastic member 324, so that the second valve plate 22 moves downward relative to the first valve plate 21. When the second valve plate 22 moves downward, it presses against the second lower limit portion 323, and the second guide The rod 321 moves downward accordingly, compressing the second elastic member 324, and the second valve plate 22 moves downward to open the second valve port 211 of the first valve plate 21, and also opens the first valve port 131. The first valve port 131 and the second valve port 211 are connected, and the upper chamber 101 is connected with the lower chamber 102. External air can enter the chamber body through the upper chamber 101 and the lower chamber 102 until the pressure in the chamber body rises to above the second set value. Under the elastic restoring force of the second elastic member 324, the second valve plate 22 and the second guide rod 321 move upward relative to the first valve plate 21 until the second valve plate 22 abuts against the first valve plate 21 to close the second valve port 211. It can be understood that the second set value is related to the pre-compression force of the second elastic member 324, and can be adjusted as needed in actual applications.

[0083] In the above-mentioned pressure release valve, each first elastic member 314 of the first connecting component and each second elastic member 324 of the second connecting component constitute the elastic component of the aforementioned connecting component. Specifically, the first elastic member 314 is used to adjust the valve opening pressure of the first valve plate 21, and the second elastic member 324 is used to adjust the valve opening pressure of the second valve plate 22.

[0084] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pressure relief valve, characterized in that: include: Valve body parts and valve plate assemblies; The valve body component has an upper cavity and a lower cavity separated by a partition, the partition has a first valve port, the upper cavity is connected with the lower cavity through the first valve port, and the upper cavity is connected with the outside; The valve plate assembly is movably connected to the partition through a connecting assembly, and the connecting assembly includes an elastic assembly and is configured as follows: when the pressure in the lower chamber exceeds a first set value or is lower than a second set value, under the action of the pressure difference between the upper chamber and the lower chamber, the valve plate assembly can overcome the elastic force of the elastic assembly and move in the direction of opening the first valve port to connect the upper chamber and the lower chamber; when the pressure value of the lower chamber is within a preset range, the valve plate assembly is in a position to close the first valve port to separate the upper chamber and the lower chamber.

2. The pressure relief valve according to claim 1, characterized in that: The valve plate assembly includes a first valve plate and a second valve plate, and the connecting assembly includes a first connecting assembly and a second connecting assembly; The first valve plate is connected to the partition plate through the first connecting assembly, and the second valve plate is connected to the first valve plate through the second connecting assembly; The first valve plate has a second valve port, the first valve plate is located above the partition plate, and the second valve plate is located below the first valve plate; The first valve plate and the second valve plate can move upward together to open the first valve port or move downward to close the first valve port; The second valve plate can move downward relative to the first valve plate to open the second valve port or move upward to close the second valve port; The second valve port is in an open state, and the second valve port is communicated with the first valve port.

3. The pressure relief valve according to claim 2, characterized in that: The first connecting assembly includes a plurality of first connecting components, and the first connecting components include a first guide rod and a first elastic member; The first guide rod is slidably provided on the first valve plate and the partition, the extension direction of the first guide rod is parallel to the axial direction of the valve body component, the upper end of the first guide rod is connected to a first upper limit portion, the lower end of the first guide rod is connected to a first lower limit portion, the first lower limit portion abuts against the lower end surface of the partition, and at least one of the first upper limit portion and the first lower limit portion is detachably connected to the first guide rod; Two ends of the first elastic member are respectively in contact with the first upper limit portion and the first valve plate.

4. The pressure relief valve according to claim 2, characterized in that: The second connecting assembly includes a plurality of second connecting components, and the second connecting components include a second guide rod and a second elastic member; The second guide rod is slidably provided on the first valve plate and the second valve plate, the extension direction of the second guide rod is parallel to the axial direction of the valve body component, the upper end of the second guide rod is connected to a second upper limit portion, the lower end of the second guide rod is connected to a second lower limit portion, the second lower limit portion abuts against the lower end surface of the second valve plate, and at least one of the second upper limit portion and the second lower limit portion is detachably connected to the second guide rod; Two ends of the second elastic member are respectively in contact with the second upper limit portion and the first valve plate.

5. The pressure relief valve according to claim 2, characterized in that: The valve plate assembly is in a position to close the first valve port, the second valve plate is located at the first valve port, and in a projection plane perpendicular to the axial direction of the valve body component, the projection plane of the second valve port is located within the projection plane of the first valve port.

6. The pressure relief valve according to claim 2, characterized in that: A first sealing ring is provided between the first valve plate and the partition plate; and / or a second sealing ring is provided between the second valve plate and the first valve plate.

7. The pressure relief valve according to any one of claims 1 to 6, characterized in that: The pressure relief valve further comprises a valve cover, the upper end of the valve body component is an open end communicating with the upper chamber, and the valve cover is used to cover the open end; The valve cover is hingedly connected to the valve body component, and a support portion is further provided on the outer periphery of the valve body component. The support portion is located on a side away from the hinge between the valve cover and the valve body component, and the support portion is used to support the valve cover. When the valve cover and the support portion are in a state of abutting against each other, there is a gap between the valve cover and the open end to allow the upper cavity to communicate with the outside.

8. The pressure relief valve according to claim 7, characterized in that: A support is provided on the periphery of the valve body component, and the support portion includes an adjusting rod and a limiting member. The adjusting rod and the support are slidably connected in the axial direction of the valve body component, and the limiting member is used to limit the relative position of the adjusting rod and the valve body component.

9. The pressure relief valve according to any one of claims 1 to 6, characterized in that: The valve body component includes a first valve body and a second valve body, the first valve body is located above the second valve body, the first valve body and the second valve body are both tubular structures, the first valve body is provided with a first flange on the periphery, the second valve body is provided with a second flange on the periphery, the first flange and the second flange are fixedly connected; the partition is fixedly connected to the first valve body.

10. A storage silo, characterized in that: It comprises a warehouse body and a pressure relief valve installed on the top of the warehouse body, and the pressure relief valve is the pressure relief valve according to any one of claims 1 to 9.

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