Self-cleaning safety valve

Abstract

The invention relates to the technical field of safety valves, in particular to a self-cleaning safety valve which comprises a valve body, a mounting plate, a sleeve, a plurality of first blocks and a plurality of second blocks, the mounting plate is slidably arranged in the valve body in the first direction, the sleeve is arranged in the valve body, and the first direction is the axial direction of the sleeve; the first blocks are rotationally arranged on the mounting plate, the second blocks are arranged on the sleeve, the multiple first blocks and the multiple second blocks are alternately distributed in the circumferential direction of the sleeve, and the first blocks and the second blocks which are adjacent in the circumferential direction of the sleeve are in sliding connection; the sliding connection faces of the first block and the second block are inclined faces, the two inclined faces on the second block gradually get away from the side close to the axis of the sleeve to the side away from the axis of the sleeve, and a medium enters the valve body through the sleeve. The first block is rotationally arranged, the flowing medium can impact the inclined face of the first block, the impurity content on the contact face of the first block and the second block is reduced, and the sealing effect of the first block and the second block is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of safety valves, in particular to a self-cleaning safety valve. Background Art

[0002] Safety valves, as key components for ensuring the safe operation of industrial systems, are widely used in fields such as chemical engineering, energy, and food processing. In principle, a safety valve is a type of pressure valve. Its core function is to automatically release fluid (gas or liquid) when the pressure within the system exceeds a preset safety limit, effectively preventing system damage due to excessive pressure and providing a solid safety line for industrial production.

[0003] To ensure reliable sealing in high-pressure environments, safety valves typically require high-force springs to provide sufficient sealing pressure. During the pressure release process, impurities and particles carried by the medium inevitably adhere to the safety valve's sealing surfaces. When the pressure drops and the safety valve reseals, these impurities form abrasive particles between the sealing surfaces. Repeated opening and closing increases wear on the sealing surfaces, reducing sealing performance and significantly shortening the safety valve's service life, increasing equipment maintenance costs and creating safety risks. Summary of the Invention

[0004] Based on this, it is necessary to provide a self-cleaning safety valve to address the problem that the sealing surface of the current safety valve is easily worn during use, resulting in a decrease in sealing performance.

[0005] The above purpose is achieved through the following technical solutions: The cam is connected to the valve core by a first pressing member and a second pressing member, the first pressing member being connected to the valve core by a first pressing member and a second pressing member being connected to the valve core. The valve core has a first state and a second state. In the first state, the first block and the second block are abutted, the inlet is separated from the installation cavity, and the two inclined surfaces on the first block gradually approach from the side close to the sleeve axis to the side away from the sleeve axis; in the second state, the first block and the second block are separated, the inlet is connected to the installation cavity, and the two inclined surfaces on the first block gradually move away from the side close to the sleeve axis to the side away from the sleeve axis.

[0006] Preferably, the valve core also includes a fixing plate and a fixing ring, the first block, the second block, the fixing plate and the fixing ring are all rubber parts, the fixing plate is arranged on the side of the mounting plate close to the sleeve, the first block is provided with a boss on the side close to the mounting plate, the boss passes through the fixing plate and is rotatably connected to the mounting plate, and the first block is rotatably connected to the fixing plate; the second block is connected to the sleeve through the fixing ring, the fixing ring is arranged on the sleeve and is located between the second block and the sleeve, the side of the fixing ring close to the second block is a slope, the slope gradually approaches the sleeve from the outer peripheral wall of the fixing ring to the center, and the side of the first block close to the fixing ring is adapted to the slope of the fixing ring.

[0007] Preferably, in the first state, a first groove is provided on a surface of the first block close to the axis of the sleeve, and the first groove passes through the first block along the first direction. When the valve core is in the second state, there is no overlapping part between the first groove and the projection of the mounting plate in the first direction; a second groove is provided on a surface of the second block away from the axis of the sleeve, and the second groove passes through the second block along the first direction; the second block includes a fixed part and two movable parts, the fixed part is arranged on the fixed ring, the two movable parts are located on both sides of the second groove in the circumferential direction of the sleeve, the movable part is connected to the fixed part, and the two movable parts are slidably connected to the fixed ring, a second spring is provided in the second groove, and both ends of the second spring are connected to the two movable parts.

[0008] Preferably, the sleeve is provided with a plurality of groups of positioning columns, and each group of positioning columns passes through the fixing ring and the fixing portion of one of the second blocks along the first direction.

[0009] Preferably, the valve core also includes a plurality of rotating components, each rotating component corresponds to a first block, and each rotating component includes a rotating rod, a first spring and a rotating cylinder. A sliding groove is provided on the mounting plate, and one end of the rotating rod is slidably arranged in the sliding groove along the first direction, and the other end of the rotating rod passes through the corresponding first block along the first direction and is slidably connected to the first block. The rotating rod is coaxial with the rotating axis of the first block and is rotatably connected; the first spring is set in the sliding groove, which is used to provide an elastic force for the rotating rod to approach the fixing ring; the rotating cylinder is connected to the boss of the first block, and a protrusion is provided on the inner wall of the rotating cylinder, and a guide groove is provided on the rotating rod, and the protrusion is slidably arranged in the guide groove, and the guide groove includes a spiral section and a straight section. The straight section is located on the side of the spiral section close to the sleeve in the first direction, and the straight section extends along the first direction. The rotating cylinder is sleeved on the rotating rod and rotates around the rotating rod and is set in the sliding groove.

[0010] Preferably, the first block and the second block both have a large end and a small end in the first direction, the small end of the first block is closer to the sleeve than its large end, and the small end of the second block is closer to the mounting plate than its large end.

[0011] Preferably, when the valve core is in the first state, two surfaces of the first block and the second block arranged along the radial direction of the sleeve are parallel to the axis of the sleeve.

[0012] Preferably, the valve body includes an upper valve seat and a lower valve seat, the inlet is arranged on the upper valve seat, the installation cavity and the pressure relief port are arranged on the lower valve seat, the upper valve seat and the lower valve seat are arranged along the first direction, and the upper valve seat and the lower valve seat are connected by bolts, the upper valve seat is provided with a cavity, the cavity is separated from the installation cavity, the upper valve seat is provided with a sliding rod, a third spring and an adjusting assembly, the sliding rod passes through the cavity along the first direction, one end of the sliding rod extends into the installation cavity and is connected to the mounting plate, the other end of the sliding rod passes through the upper valve seat and is slidably connected to the upper valve seat, the third spring is telescopically arranged in the cavity along the first direction, a baffle is provided on the sliding rod, the baffle is located in the cavity, one end of the third spring is connected to the baffle, and the other end of the third spring is connected to the adjusting assembly, and the adjusting assembly is used to adjust the elastic force of the third spring.

[0013] Preferably, the adjusting assembly includes a top plate, a sleeve and a nut. The top plate is slidably arranged in the cavity and sleeved on the sliding rod, and the top plate is connected to the end of the third spring away from the baffle. The top plate is slidably connected to the sliding rod, the sleeve is sleeved on the sliding rod, one end of the sleeve is rotatably connected to the top plate, the other end of the sleeve passes through the upper valve seat and is threadedly connected to the upper valve seat, and the nut is sleeved outside the sleeve and is threadedly connected to the sleeve.

[0014] Preferably, a cover is provided on the upper valve seat, and the cover covers the nut and the end of the sliding rod.

[0015] The beneficial effects of the present invention are as follows: when the valve core is in the first state, the first block and the second block have a tendency to move away from the axis of the sleeve in the radial direction of the sleeve under the pressure of the medium in the container, and at the same time, the first block has a tendency to move away from the second block in the first direction. Through the coordinated arrangement of the first block and the second block, the area of ​​the side of the first block closest to the sleeve is larger than the side of the second block closest to the sleeve, the force-bearing area of ​​the first block is larger than the force-bearing area of ​​the second block, the thrust of the first block in the radial direction of the sleeve is larger than that of the second block, the pressure between the first block and the second block in the radial direction of the sleeve increases, and the friction between the first block and the second block increases, which can improve the sealing effect of the first block and the second block; when the valve core switches from the first state to the second state, the first block and the second block can reduce the adhesion force of impurities on their contact surfaces through friction; the first block is rotated, and when the valve core is in the second state, the flowing medium can impact the inclined surface of the first block, reduce the impurity content on the contact surface of the first block and the second block, and further improve the sealing effect of the first block and the second block.

[0016] At the same time, in the first state, the friction force of the first block moving along the first direction increases, which improves the opening and closing pressure range of the valve core. Under small fluctuations in system pressure, the opening and closing frequency of the valve core is reduced, the number of collisions between the first block and the second block is reduced, and the friction loss between the first block and the second block is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a self-cleaning safety valve provided by an embodiment of the present invention; Figure 2 A right side view of a self-cleaning safety valve provided by an embodiment of the present invention; Figure 3 for Figure 2 Cross-sectional view along the AA axis; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 A schematic diagram of a second state of a valve core of a self-cleaning safety valve provided by an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 A schematic structural diagram of a valve core of a self-cleaning safety valve provided in an embodiment of the present invention; Figure 8 A split diagram of a valve core of a self-cleaning safety valve provided by an embodiment of the present invention; Figure 9 A right side view of a valve core of a self-cleaning safety valve provided by an embodiment of the present invention; Figure 10 for Figure 9 Cross-sectional view in the middle DD direction; Figure 11 A schematic structural diagram of a rotating rod of a self-cleaning safety valve provided in an embodiment of the present invention.

[0018] in: 101. Inlet; 102. Mounting cavity; 103. Pressure relief port; 104. Mounting plate; 105. Sleeve; 106. First block; 107. Fixed portion; 108. Movable portion; 109. Fixed plate; 110. Second spring; 111. Fixed ring; 112. Rotating rod; 113. First spring; 114. Rotating cylinder; 115. Slide groove; 116. Spiral section; 117. Straight section; 118. First groove; 119. Second groove; 120. Positioning rod; 201. Upper valve seat; 202. Lower valve seat; 203. Receptacle; 204. Sliding rod; 205. Third spring; 206. Partition; 207. Baffle; 208. Top plate; 209. Sleeve; 210. Nut; 211. Cover. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0022] like Figures 1 to 11As shown, a self-cleaning safety valve provided by an embodiment of the present invention includes a valve body and a valve core. The valve body is provided with an inlet 101 communicating with a container, a mounting cavity 102 and a pressure relief port 103. The pressure relief port 103 is communicated with the mounting cavity 102. The valve core includes a mounting plate 104, a sleeve 105, a plurality of first blocks 106 and a plurality of second blocks. The mounting plate 104 is slidably arranged in the mounting cavity 102 along a first direction, and the mounting plate 104 is perpendicular to the first direction. The sleeve 105 is arranged in the mounting cavity 102. The first direction is the axial direction of the sleeve 105. The inlet 101 is communicated with the mounting cavity 102 through the sleeve 105. The mounting plate 104 and the sleeve 105 are arranged along the first direction. The medium in the container passes through the sleeve 106. The sleeve 105 then enters the mounting cavity 102 along the radial direction of the sleeve 105; each first block 106 is rotated around its own axis and is arranged on a surface of the mounting plate 104 close to the sleeve 105, and the rotation axis of the first block 106 extends along the first direction, and multiple second blocks are arranged on a surface of the sleeve 105 close to the mounting plate 104, and multiple first blocks 106 and multiple second blocks are alternately distributed in the circumferential direction of the sleeve 105, and the first blocks 106 and second blocks adjacent to each other in the circumferential direction of the sleeve 105 are slidingly connected; the sides of the sliding connection between the first block 106 and the second block are both inclined surfaces, and the two inclined surfaces on each second block gradually move away from the side close to the axis of the sleeve 105 to the side away from the axis of the sleeve 105.

[0023] The valve core has a first state and a second state. In the first state, the first block 106 and the second block are abutted, the inlet 101 is separated from the installation cavity 102, and the two inclined surfaces on the first block 106 gradually approach from the side close to the axis of the sleeve 105 to the side away from the axis of the sleeve 105; in the second state, the first block 106 is separated from the second block, the inlet 101 is connected to the installation cavity 102, and the two inclined surfaces on the first block 106 gradually move away from the side close to the axis of the sleeve 105 to the side away from the axis of the sleeve 105.

[0024] When the valve core is in the first state, the first block 106 and the second block have a tendency to move away from the axis of the sleeve 105 in the radial direction of the sleeve 105 under the pressure of the medium in the container. At the same time, the first block 106 has a tendency to move away from the second block in the first direction. Through the coordinated arrangement of the first block 106 and the second block, the area of ​​the side of the first block 106 closest to the sleeve 105 is larger than the area of ​​the side of the second block closest to the sleeve 105. The force-bearing area of ​​the first block 106 is larger than the force-bearing area of ​​the second block. The thrust of the first block 106 in the radial direction of the sleeve 105 is greater than that of the second block. The pressure between the blocks along the radial direction of the sleeve 105 increases, and the friction between the first block 106 and the second block increases, which can improve the sealing effect of the first block 106 and the second block; when the valve core switches from the first state to the second state, the first block 106 and the second block can reduce the adhesion of impurities on their contact surfaces through friction; the first block 106 is rotated, and when the valve core is in the second state, the flowing medium can impact the inclined surface of the first block 106, reduce the impurity content on the contact surface of the first block 106 and the second block, and further improve the sealing effect of the first block 106 and the second block.

[0025] At the same time, in the first state, the friction force of the first block 106 moving along the first direction increases, thereby increasing the opening and closing pressure range of the valve core, reducing the opening and closing frequency of the valve core under small fluctuations in system pressure, reducing the number of collisions between the first block 106 and the second block, and reducing the friction loss between the first block 106 and the second block.

[0026] In this embodiment, the valve core also includes a fixed plate 109 and a fixed ring 111. The first block 106, the second block, the fixed plate 109 and the fixed ring 111 are all rubber parts. The fixed plate 109 is arranged on the side of the mounting plate 104 close to the sleeve 105. The first block 106 is provided with a boss on the side close to the mounting plate 104. The boss passes through the fixed plate 109 and is rotatably connected to the mounting plate 104, and the first block 106 is rotatably connected to the fixed plate 109; the second block is connected to the sleeve 105 through the fixed ring 111, and the fixed ring 111 is arranged on the sleeve 105 and is located between the second block and the sleeve 105 The fixing ring 111 is coaxial with the sleeve 105. The side of the fixing ring 111 close to the second block is a slope, which gradually approaches the sleeve 105 from the outer peripheral wall to the center of the fixing ring 111. The side of the first block 106 close to the fixing ring 111 is adapted to the slope of the fixing ring 111. In the first state, when the first block 106 is moved along the radial direction of the sleeve 105 by the pressure of the medium in the container, the contact pressure between the first block 106 and the fixing ring 111 increases, so that the sealing effect of the valve core in the first state is better, and at the same time, it also provides further resistance for the valve core to switch from the first state to the second state.

[0027] The first block 106 and the second block may be triangular prisms or quadrangular prisms extending along the first direction. When the first block 106 and the second block are triangular prisms, their projections in the first direction are acute triangles; when they are quadrangular prisms, their projections in the first direction are isosceles trapezoids.

[0028] In this embodiment, in the first state, a first groove 118 is defined on one surface of the first block 106 near the axis of the sleeve 105. The first groove 118 extends through the first block 106 in the first direction. When the valve core is in the second state, the projection of the first groove 118 and the mounting plate 104 in the first direction do not overlap. When the medium enters the mounting cavity 102 along the radial direction of the sleeve 105, it impacts the inclined surface of the first block 106, thereby cleaning the surfaces of the first block 106 that contact the second block and the retaining ring 111. The first groove 118 reduces the thickness of the inclined surface of the sliding connection between the first block 106 and the second block in the circumferential direction of the sleeve 105, causing the impact of the medium to partially deflect the inclined surface of the sliding connection between the first block 106 and the second block, thereby reducing the impact force of the medium on the inclined surface of the first block 106 and reducing wear on the inclined surface of the first block 106. Because the deflecting portion of the first block 106 does not contact the mounting plate 104, the mounting plate 104 does not restrict the deflection of the first block 106. The side of the first groove 118 adjacent to the inclined surface of the first block 106 is parallel to the inclined surface of the first block 106. In the first state of the valve core, the first groove 118 faces the axis of the sleeve 105. The medium in the sleeve 105 enters the first groove 118, thereby generating pressure perpendicular to the inclined surface of the first block 106 and increasing the contact pressure between the first block 106 and the second block.

[0029] A second groove 119 is provided on the surface of the second block away from the axis of the sleeve 105, and the second groove 119 passes through the second block along the first direction; the second block includes a fixed part 107 and two movable parts 108, the fixed part 107 is arranged on the fixed ring 111, and the two movable parts 108 are located on both sides of the second groove 119 in the circumferential direction of the sleeve 105, the movable part 108 is connected to the fixed part 107, and the two movable parts 108 are slidingly connected to the fixed ring 111, and a second spring 110 is provided in the second groove 119, and the two ends of the second spring 110 are connected to the two movable parts 108. The second groove 119 can reduce the thickness of the inclined surface of the sliding connection between the second block and the first block 106 in the circumferential direction of the sleeve 105. When the medium flows into the installation cavity 102, it will impact the two inclined surfaces of the second block. At the same time, the two movable parts 108 of the second block will also be impacted and deflected, and the second spring 110 will be compressed. After the deflection, the movable part 108 will deform due to the angle between the deflection axis and the inclined surface of the fixing ring 111, thereby increasing the friction between the movable part 108 and the fixing ring 111. When the medium no longer flows into the installation cavity 102, the deflected movable part 108 will return to its original position under the action of the second spring 110.

[0030] In this embodiment, multiple groups of positioning columns are provided on the sleeve 105, and the multiple groups of positioning columns are arranged around the circumferential direction of the sleeve 105. Each group of positioning columns passes through the fixing ring 111 and the fixing portion 107 of one of the second blocks along the first direction. Each group of positioning columns includes two positioning rods 120, and the two positioning rods 120 are arranged along the circumferential direction of the sleeve 105, which can effectively increase the stability of the second block in the radial direction of the sleeve 105.

[0031] In this embodiment, the valve core also includes a plurality of rotating components, each rotating component corresponds to a first block 106, and each rotating component includes a rotating rod 112, a first spring 113 and a rotating cylinder 114. A sliding groove 115 is provided on the mounting plate 104. One end of the rotating rod 112 is slidably arranged in the sliding groove 115 along the first direction, and the other end of the rotating rod 112 passes through the corresponding first block 106 along the first direction and is slidably connected to the first block 106. The rotating rod 112 is coaxial with the rotating axis of the first block 106 and is rotatably connected; the first spring 113 is set in the sliding groove 115, which is used to provide an elastic force for the rotating rod 112 to approach the fixing ring 111; the first spring 113 is extended and retracted along the first direction, and the two ends of the first spring 113 are respectively connected to the mounting plate 104 and the rotating rod 112. The rotating cylinder 114 is connected to the boss of the first block 106. A protrusion is provided on the inner wall of the rotating cylinder 114, and a guide groove is provided on the rotating rod 112. The protrusion is slidably set in the guide groove. The guide groove includes a spiral section 116 and a straight section 117. The straight section 117 is located on the side of the spiral section 116 close to the sleeve 105 in the first direction, and the straight section 117 extends along the first direction. The rotating cylinder 114 is sleeved on the rotating rod 112 and rotates around the rotating rod 112 and is set in the sliding groove 115. When the valve core is in the first state, the first spring 113 is in a compressed state, the rotating rod 112 abuts against the fixing ring 111, and the protrusion on the rotating cylinder 114 is located in the straight section 117 of the guide groove. When the valve core transitions from the first state to the second state, the rotating rod 112 extends out of the sliding groove 115 in the first direction under the action of the first spring 113. The protrusion of the rotating drum 114 slides in the straight section 117 of the guide groove. The rotating drum 114 does not rotate at this time and slides relative to the rotating rod 112. When the first block 106 and the second block separate from the second block in the first direction, the protrusion slides into the spiral section 116 of the guide groove and, guided by the spiral section 116, drives the first block 106 to rotate 180 degrees, so that the two inclined surfaces of the first block 106 gradually move away from the center of the sleeve 105 from the inside to the outside along the radial direction of the sleeve 105. The valve core is now in the second state.

[0032] In this embodiment, the first block 106 and the second block both have a large end and a small end in the first direction. The small end of the first block 106 is closer to the sleeve 105 than its large end, and the small end of the second block is closer to the mounting plate 104 than its large end. When the valve core switches from the first state to the second state, when the first block 106 moves between the two adjacent second blocks, the first block 106 does not contact the second block, thereby reducing the friction loss between the first block 106 and the second block and improving the service life of the valve core.

[0033] In this embodiment, when the valve core is in the first state, the two surfaces of the first block 106 and the second block arranged in the radial direction of the sleeve 105 are parallel to the axis of the sleeve 105, which increases the thickness of the first block 106 and the second block in the radial direction of the sleeve 105, increases the contact area between the first block 106 and the second block, and further improves the sealing effect and the friction between the first block 106 and the second block in the first state.

[0034] In this embodiment, the valve body includes an upper valve seat 201 and a lower valve seat 202, the inlet 101 is arranged on the upper valve seat 201, the installation cavity 102 and the pressure relief port 103 are arranged on the lower valve seat 202, the upper valve seat 201 and the lower valve seat 202 are arranged along a first direction, and the upper valve seat 201 and the lower valve seat 202 are connected by bolts, the upper valve seat 201 is provided with a cavity 203, the cavity 203 is separated from the installation cavity 102, the upper valve seat 201 is provided with a slide rod 204, a third spring 205 and an adjusting component, the slide rod 204 passes through the cavity 203 along the first direction, one end of the slide rod 204 extends into the installation cavity 102 and is connected to the installation plate 104, the other end of the slide rod 204 passes through the upper valve seat 201 and slides with the upper valve seat 201 Connection, a partition 206 is provided between the upper valve seat 201 and the lower valve seat 202, the partition 206 is used to separate the cavity 203 and the installation cavity 102, the slide rod 204 passes through the partition 206 along the first direction and is slidably connected to the partition 206, the third spring 205 is telescopically arranged in the cavity 203 along the first direction, a baffle 207 is provided on the slide rod 204, the baffle 207 is located in the cavity 203, one end of the third spring 205 is connected to the baffle 207, and the other end of the third spring 205 is connected to the adjusting assembly, the third spring 205 is sleeved on the slide rod 204, and the baffle 207 is located on the side of the third spring 205 close to the sleeve 105 in the first direction, and the adjusting assembly is used to adjust the elastic force of the third spring 205.

[0035] In this embodiment, the regulating assembly includes a top plate 208, a sleeve 209 and a nut 210. The top plate 208 is slidably disposed in the cavity 203 and sleeved on the slide rod 204. The top plate 208 is connected to one end of the third spring 205 away from the baffle 207. The top plate 208 is slidably connected to the slide rod 204. The sleeve 209 is sleeved on the slide rod 204. One end of the sleeve 209 is rotatably connected to the top plate 208. The other end of the sleeve 209 passes through the upper valve seat 201 and is threadedly connected to the upper valve seat 201. The movable sleeve 209 can change the depth of the sleeve 209 inserted into the upper valve seat 201, thereby changing the distance between the top plate 208 and the baffle 207, adjusting the compression degree of the third spring 205, and changing the force applied by the third spring 205 to the slide rod 204. The nut 210 is sleeved on the outside of the sleeve 209 and is threadedly connected to the sleeve 209. Rotating the nut 210 makes the nut 210 abut against the upper valve seat 201, which can limit the rotation of the sleeve 209 and improve the stability of the sleeve 209 during use.

[0036] In this embodiment, a cover 211 is provided on the upper valve seat 201 , and the cover 211 covers the nut 210 and the end of the slide rod 204 . The cover 211 protects the nut 210 to prevent accidental touch.

[0037] The working principle of the self-cleaning safety valve provided in the above embodiment is: First, install the lower valve seat 202 on the container so that the inlet 101 is connected to the interior of the container. At this time, the valve core is in the first state. The medium inside the container enters the sleeve 105 through the inlet 101. The medium also enters the first groove 118 and exerts pressure on the first block 106. The first block 106 is subjected to a force away from the sleeve 105 in the radial direction of the sleeve 105. Through contact with the inclined surface on the fixing ring 111, the pressure between the first block 106 and the fixing ring 111 increases. At the same time, the contact pressure between the first block 106 and the second block will also increase, thereby increasing the friction between the first block 106 and the second block in the first direction, thereby increasing the resistance of the valve core to switching from the first state to the second state.

[0038] When the valve core switches from the first state to the second state, the medium in the sleeve 105 pushes the fixed plate 109 away from the sleeve 105 in the first direction, and the fixed plate 109 drives the first block 106 and the mounting plate 104 to move synchronously. The fixed plate 109 pushes the sliding rod 204 to move, and the sliding rod 204 slides relative to the partition plate 206 and drives the baffle 207 to compress the third spring 205; when the mounting plate 104 moves, the rotating rod 112 is pushed by the first spring 113 to slide in the sliding groove 115 relative to the mounting plate 104 in the first direction, and the protrusion on the rotating cylinder 114 slides in the straight section 117 in the guide groove. The first block 106 moves synchronously with the fixed plate 109. When the first block 106 is completely separated from the second block in the first direction, the protrusion on the rotating cylinder 114 slides into the spiral section 116 of the guide groove. As the protrusion slides in the spiral section 116, the protrusion drives the rotating cylinder 114 to rotate, and the rotating cylinder 114 drives the first block 106 to rotate. When the slide rod 204 slides to the limit position under the elastic force of the third spring 205, the valve core switches to the second state, and the first block 106 rotates 180°. At this time, the two inclined surfaces on the first block 106 that contact the second block gradually move away from the side close to the axis of the sleeve 105 to the side away from the axis of the sleeve 105. The medium flowing out of the sleeve 105 can impact the inclined surface of the first block 106, thereby flushing the sealing surface of the first block 106.

[0039] The medium in the sleeve 105 continuously flows into the installation cavity 102 and is then discharged from the pressure relief port 103. Under the impact of the medium, the two movable parts 108 on the second block will also deflect and compress the second spring 110. Under the impact of the medium, the movable part 108 will try to be parallel to the flow direction of the medium, thereby reducing the impact force of the medium and increasing its own service life.

[0040] When the pressure in the container decreases to a level that is insufficient to compress the third spring 205, the third spring 205 begins to release its elastic force, and the third spring 205 pushes the slide bar 204 toward the sleeve 105 through the baffle 207. The slide bar 204 drives the first block 106 toward the fixing ring 111 through the mounting plate 104. Before the first block 106 contacts the second block, the rotating rod 112 will first abut against the fixing ring 111. As the mounting plate 104 moves, the rotating rod 112 slides in the sliding groove 115, and the protrusion on the rotating drum 114 slides in the spiral section 116 in the guide groove. The protrusion drives the rotating drum 114 to rotate, and the rotating drum 114 drives the first block 106 to rotate. When the protrusion slides to the straight section 117 of the guide groove, the first block 106 rotates 180° again. As the elastic force of the first spring 113 is released, the first block 106 contacts the second fixing ring 111 respectively. At this time, the movable portion 108 of the second block is no longer impacted by the medium, and the movable portion 108 is reset under the action of the second spring 110, and the valve core returns to the first state.

[0041] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A self-cleaning safety valve, comprising a valve body and a valve core, wherein the valve body is provided with an inlet connected to a container, an installation cavity and a pressure relief port, wherein the pressure relief port is connected to the installation cavity, and wherein: The valve core includes a mounting plate, a sleeve, a plurality of first blocks and a plurality of second blocks. The mounting plate is slidably arranged in the mounting cavity along a first direction, and the mounting plate is perpendicular to the first direction. The sleeve is arranged in the mounting cavity. The first direction is the axial direction of the sleeve. The inlet and the mounting cavity are communicated with each other through the sleeve. The mounting plate and the sleeve are arranged along the first direction. The medium in the container enters the mounting cavity along the radial direction of the sleeve after passing through the sleeve. Each first block is rotatable around its own axis and is arranged on a surface of the mounting plate close to the sleeve. The rotation axis of the first block extends along the first direction. The plurality of second blocks are arranged on a surface of the sleeve close to the mounting plate. The plurality of first blocks and the plurality of second blocks are alternately distributed in the circumferential direction of the sleeve. The first blocks and the second blocks adjacent to each other in the circumferential direction of the sleeve are slidably connected. The sides on which the first block and the second block are slidably connected are both inclined surfaces. The two inclined surfaces on each second block gradually move away from each other from the side close to the sleeve axis to the side away from the sleeve axis. The valve core has a first state and a second state. In the first state, the first block and the second block are abutted, the inlet is separated from the installation cavity, and the two inclined surfaces on the first block gradually approach from the side close to the sleeve axis to the side away from the sleeve axis; in the second state, the first block and the second block are separated, the inlet is connected to the installation cavity, and the two inclined surfaces on the first block gradually move away from the side close to the sleeve axis to the side away from the sleeve axis.

2. A self-cleaning safety valve according to claim 1, characterized in that: The valve core also includes a fixed plate and a fixed ring. The first block, the second block, the fixed plate and the fixed ring are all rubber parts. The fixed plate is arranged on the side of the mounting plate close to the sleeve. The first block is provided with a boss on the side close to the mounting plate. The boss passes through the fixed plate and is rotatably connected to the mounting plate, and the first block is rotatably connected to the fixed plate; the second block is connected to the sleeve through the fixed ring, the fixed ring is arranged on the sleeve and is located between the second block and the sleeve, the side of the fixed ring close to the second block is an inclined surface, and the inclined surface gradually approaches the sleeve from the outer peripheral wall of the fixed ring to the center, and the side of the first block close to the fixed ring is adapted to the inclined surface of the fixed ring.

3. A self-cleaning safety valve according to claim 2, characterized in that: In the first state, a first groove is provided on a surface of the first block close to the axis of the sleeve, and the first groove passes through the first block along the first direction. When the valve core is in the second state, there is no overlapping part between the first groove and the projection of the mounting plate in the first direction; a second groove is provided on a surface of the second block away from the axis of the sleeve, and the second groove passes through the second block along the first direction; the second block includes a fixed part and two movable parts, the fixed part is arranged on the fixed ring, the two movable parts are located on both sides of the second groove in the circumferential direction of the sleeve, the movable part is connected to the fixed part, and the two movable parts are slidably connected to the fixed ring, a second spring is provided in the second groove, and the two ends of the second spring are connected to the two movable parts.

4. A self-cleaning safety valve according to claim 3, characterized in that: A plurality of groups of positioning columns are provided on the sleeve, and each group of positioning columns penetrates the fixing ring and the fixing portion of one of the second blocks along the first direction.

5. A self-cleaning safety valve according to claim 2, characterized in that: The valve core also includes a plurality of rotating components, each rotating component corresponds to a first block, and each rotating component includes a rotating rod, a first spring and a rotating cylinder. A sliding groove is opened on the mounting plate, and one end of the rotating rod is slidably arranged in the sliding groove along the first direction, and the other end of the rotating rod passes through the corresponding first block along the first direction and is slidably connected to the first block. The rotating rod is coaxial with the rotating axis of the first block passed through and is rotatably connected; the first spring is set in the sliding groove, which is used to provide an elastic force for the rotating rod to approach the fixing ring; the rotating cylinder is connected to the boss of the first block, and a protrusion is provided on the inner wall of the rotating cylinder, and a guide groove is provided on the rotating rod. The protrusion is slidably arranged in the guide groove, and the guide groove includes a spiral section and a straight section. The straight section is located on the side of the spiral section close to the sleeve in the first direction, and the straight section extends along the first direction. The rotating cylinder is sleeved on the rotating rod and rotates around the rotating rod and is set in the sliding groove.

6. A self-cleaning safety valve according to claim 1, characterized in that: The first block and the second block both have a large end and a small end in the first direction, the small end of the first block is closer to the sleeve than the large end thereof, and the small end of the second block is closer to the mounting plate than the large end thereof.

7. A self-cleaning safety valve according to claim 6, characterized in that: When the valve core is in the first state, two surfaces of the first block and the second block arranged in the radial direction of the sleeve are parallel to the axis of the sleeve.

8. The self-cleaning safety valve according to claim 1, characterized in that: The valve body includes an upper valve seat and a lower valve seat, the inlet is arranged on the upper valve seat, the installation cavity and the pressure relief port are arranged on the lower valve seat, the upper valve seat and the lower valve seat are arranged along a first direction, and the upper valve seat and the lower valve seat are connected by bolts, a cavity is provided on the upper valve seat, the cavity is separated from the installation cavity, a sliding rod, a third spring and an adjusting assembly are provided on the upper valve seat, the sliding rod passes through the cavity along the first direction, one end of the sliding rod extends into the installation cavity and is connected with the mounting plate, the other end of the sliding rod passes through the upper valve seat and is slidably connected to the upper valve seat, the third spring is telescopically arranged in the cavity along the first direction, a baffle is provided on the sliding rod, the baffle is located in the cavity, one end of the third spring is connected to the baffle, and the other end of the third spring is connected to the adjusting assembly, and the adjusting assembly is used to adjust the elastic force of the third spring.

9. A self-cleaning safety valve according to claim 8, characterized in that: The adjusting assembly includes a top plate, a sleeve and a nut. The top plate is slidably arranged in the cavity and sleeved on the sliding rod, and the top plate is connected to the end of the third spring away from the baffle. The top plate is slidably connected to the sliding rod, and the sleeve is sleeved on the sliding rod. One end of the sleeve is rotatably connected to the top plate, and the other end of the sleeve passes through the upper valve seat and is threadedly connected to the upper valve seat. The nut is sleeved outside the sleeve and is threadedly connected to the sleeve.

10. A self-cleaning safety valve according to claim 9, characterized in that: A cover is provided on the upper valve seat, and the cover covers the nut and the end of the sliding rod.

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