Safety valve sealing performance detection device

Abstract

The invention relates to the technical field of safety valve leakproofness detection, in particular to a safety valve leakproofness detection device which comprises a fixing unit and a detection unit. A plurality of safety valves are extruded and fixed through a limiting piece and a downward pressing piece, and a linkage piece I is matched with a spraying piece I; a circle of leakage detection liquid is sprayed on the surface of the connecting position between a valve body and a valve cover of the safety valve, the right side of the safety valve is blocked through an alignment piece, and a circle of leakage detection liquid is sprayed on the surface of the connecting position between a tightly-attached circular plate and the safety valve through cooperation of a second linkage piece and a second spraying piece. Gas with the same gas pressure is introduced into each safety valve through the gas pressure control piece, whether bubbles appear on the surfaces of the leakage detection liquid at two positions of each safety valve is observed, the sealing performance of the safety valves is judged, and the setting pressure of the safety valves is ensured to be within the gas pressure range in the two safety valves in the middle through the gas pressure control piece. And observing whether bubbles appear on the surfaces of the leakage detection liquid at two positions of each safety valve, and judging the sealing performance of the safety valve.

Description

Technical Field

[0001] The invention relates to the technical field of safety valve sealing detection, in particular to a safety valve sealing detection device. Background Art

[0002] Safety valves are special valves whose opening and closing parts are normally closed under the action of external forces. When the medium pressure in the equipment or pipeline exceeds the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. They are mainly used in boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, which plays an important protective role in personal safety and equipment operation. These depend on its sealing performance, so the sealing performance test of the finished safety valve is particularly important.

[0003] The methods for safety valve sealing test include air tightness test, liquid tightness test, water pressure test and ultrasonic test. Among them, the liquid tightness test and water pressure test both require the safety valve to contact water, which will result in residual water on the surface or inside of the safety valve after the test, resulting in the safety valve being unable to be put into normal use immediately. Therefore, the test product is easily lost during the test. The ultrasonic test requires applying a coupling agent to the surface of the safety valve and then using a handheld probe to test its surface. The test process is relatively long. After the test is completed, the coupling agent on the surface of the safety valve needs to be manually wiped off. The process is cumbersome, so this test is less efficient. The air tightness test uses a leak detector to test the sealing and air tightness of the safety valve under a specified pressure. However, this method cannot detect the sealing performance between the valve cover and the valve body, resulting in incomplete test results. Summary of the invention

[0004] In view of the above problems, the embodiment of the present application provides a safety valve sealing detection device to solve the technical problems of test product loss, low detection efficiency and incomplete detection results in the detection process in the related art. In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions.

[0005] A safety valve sealing detection device according to an embodiment of the present application comprises a fixing unit and a detection unit, wherein the detection unit is arranged on the fixing unit for detecting the sealing of the safety valve; the fixing unit comprises a fixing platform, a circular marking line is evenly arranged on the upper end of the fixing platform, a limiting part is arranged in the middle of the fixing platform, an air pressure control part is arranged on the fixing platform, a rectangular block is fixedly installed on the upper left end of the fixing platform, an extrusion part is arranged on the right side of the rectangular block, a down-pressing part is arranged on the upper right end of the rectangular block, and a positioning part is arranged on the right side of the fixing platform; the detection unit comprises a linkage part 1, a linkage part 1 is arranged on the down-pressing part, a spraying part 1 is evenly arranged on the linkage part 1, a linkage part 2 is arranged on the positioning part, and a spraying part 2 is evenly arranged on the linkage part 2; an electromagnetic plate is evenly arranged on the left end of the electromagnetic plate, a circular plate is magnetically attracted to the left end of the electromagnetic plate, an insertion cylinder is fixedly installed on the left end of the circular plate, and a cylinder is tightly pressed against the circular plate. An anti-slip component is provided at the left end of the circular plate, and the anti-slip component includes a cylindrical groove, and a cylindrical groove is evenly opened along the circumference of the left end of the circular plate that is close to it. An extrusion spring is fixedly installed in the cylindrical groove, a contact column is fixedly installed on the left end of the extrusion spring, and an extension column is fixedly installed on the right end of the contact column. The extension column is slidably connected to the close circular plate left and right, and a wedge block is fixedly installed on the right end of the extension column. The left end surface area of ​​the wedge block is smaller than the right end surface area. The arc surface of the inserted cylinder is evenly slidably connected with a protruding block along its circumference, and the protruding block is fixedly installed with a concave bracket on the side facing the central axis of the inserted cylinder, and the end of the vertical section on the right side of the concave bracket is slidably connected to the wedge block, and the concave bracket and the close circular plate as well as the concave bracket and the inserted cylinder are all slidably connected, and arc grooves are opened all around the protruding block, and a limit spring is fixedly installed in the arc groove, and a hemispherical block is fixedly connected to the end of the limit spring.

[0006] According to an embodiment of the present invention, the limiting member includes a rotating rod, an assembly groove is provided on the fixed platform, a rotating rod arranged in the front-to-back direction is rotatably connected to the middle part of the fixed platform, a thread groove group is evenly arranged along the linear direction of the rotating rod, the thread groove group is composed of front-to-back symmetrical thread grooves, an extrusion block is threadedly connected to the thread groove, and the extrusion block is slidably connected to the assembly groove on the fixed platform front-to-back.

[0007] According to an embodiment of the present invention, the air pressure control component includes a ventilation groove, the ventilation grooves are evenly opened on the fixed platform, the ventilation grooves are located in the middle of the threaded groove group, an air pump is fixedly installed on the left end of the fixed platform, a T-shaped air intake pipe is fixedly installed on the air inlet of the air pump, a ventilation pipe is fixedly connected between the air intake pipe and the ventilation groove, and an electric pressure regulating valve is fixedly installed in the ventilation pipe.

[0008] According to an embodiment of the present invention, the extrusion member includes a distance-controlling cylinder 1, a distance-controlling cylinder 1 is fixedly installed on the right end of the rectangular block, a synchronous square rod is fixedly installed on the telescopic end of the distance-controlling cylinder 1, a connecting square rod is fixedly installed on the right end of the synchronous square rod evenly along its linear direction, and an arc block is fixedly installed at each end of the connecting square rod.

[0009] According to an embodiment of the present invention, the pressing member includes two distance-controlling cylinders, which are symmetrically fixedly installed on the upper left side of the fixed platform, and an L-shaped right-angle bracket is fixedly installed on the top of the telescopic rod of the two distance-controlling cylinders. A horizontal square bar is commonly fixedly installed on the end of the horizontal section of the right-angle bracket, and a fixed cylinder is evenly fixedly installed along the linear direction of the lower end of the horizontal square bar, a cylindrical spring is fixedly installed on the lower end of the fixed cylinder, an extrusion cylinder is fixedly installed on the lower end of the cylindrical spring, and a positioning rod that slides up and down and is inserted into the fixed cylinder is fixedly installed on the upper end of the extrusion cylinder.

[0010] According to an embodiment of the present invention, the linkage member 1 includes an inverted L-shaped bracket, an inverted L-shaped bracket is evenly fixedly installed on the left end of the horizontal square rod, a circular ring plate 1 is fixedly installed on the lower end of the vertical section of the inverted L-shaped bracket, a rotating wheel is rotatably connected to the middle part of the circular ring plate 1, a motor 1 is fixedly installed on the upper end of the horizontal section of the front right-angle bracket through a motor seat, a sprocket 1 is fixedly installed on the output shaft of the motor 1 through a coupling, and a toothed chain belt 1 is commonly connected to the sprocket 1 and the rotating wheel for transmission.

[0011] According to an embodiment of the present invention, the spraying part includes a liquid storing box, a ring-shaped liquid storing box is fixedly installed on the upper end of the rotating wheel, a liquid passing pipe is fixedly installed on the upper end of the liquid storing box, a delivery pump is fixedly installed on the lower end of the delivery pump, a delivery pipe is fixedly installed on the lower end of the delivery pump, a spray head is fixedly installed on the end of the delivery pipe, an arc-shaped positioning block is fixedly installed on the front end of the spray head, and a brush roller is rotatably connected to the middle of the positioning block.

[0012] According to an embodiment of the present invention, the alignment member includes an L-shaped plate, an L-shaped plate is fixedly installed on the right end of the fixed table, a distance control cylinder three is fixedly installed on the left end of the vertical section of the L-shaped plate, a rectangular rod is fixedly installed on the telescopic end of the distance control cylinder three, a fixed rod is evenly fixedly installed on the left end of the rectangular rod, a circular plate is fixedly installed on the left end of the fixed rod, and the middle part of the left end of the circular plate is fixedly connected to the electromagnetic plate.

[0013] According to an embodiment of the present invention, the second linkage member includes an annular rotating plate, the left end of the circular plate is rotatably connected to an annular rotating plate with a [-shaped cross-section, a second motor is fixedly installed on the rectangular rod through a motor seat, a second sprocket is fixedly installed on the output shaft of the second motor through a coupling, and a toothed chain belt two is commonly connected between the second sprocket and the annular rotating plate for transmission.

[0014] According to an embodiment of the present invention, the second spraying part includes a second liquid storage box, a rectangular liquid storage box is fixedly installed on the left end of the annular rotating plate, a liquid passage pipe is fixedly installed on the upper end of the second liquid storage box, a delivery pump is fixedly installed on the lower end of the second liquid storage box, a delivery pipe is fixedly installed on the lower end of the second delivery pump, a spray head is fixedly installed on the end of the second delivery pipe, an arc-shaped positioning block is fixedly installed on the front end of the second spray head, and a coating brush roller is rotatably connected to the middle part of the second positioning block.

[0015] It can be seen from the above technical solutions that the present invention has the following advantages:

[0016] 1. In the present invention, a plurality of safety valves are squeezed and fixed by a limiting member and a pressing member, a linking member 1 cooperates with a spraying member 1 to spray a circle of leak detection liquid on the surface of the connection between the valve body and the valve cover of the safety valve, the right side of the safety valve is blocked by a positioning member, a linking member 2 cooperates with a spraying member 2 to spray a circle of leak detection liquid on the surface of the connection between the close-fitting circular plate and the safety valve, gas of the same air pressure is introduced into each safety valve through an air pressure control member, and whether bubbles appear on the surface of the two leak detection liquids of each safety valve is observed to determine the sealing performance of the safety valve, and the air pressure control member is used to ensure that the set pressure of the safety valve is within the gas pressure range of the two safety valves in the middle, and whether bubbles appear on the surface of the two leak detection liquids of each safety valve is observed to determine the sealing performance of the safety valve.

[0017] 2. In the present invention, multiple hemispherical blocks are used to limit the protruding block to prevent the protruding block from entering the inserted cylinder and no longer being in close contact with the inner wall of the safety valve pipe when the close circular plate is no longer subject to the extrusion force, thereby causing the close circular plate to be separated from the safety valve due to the reaction force of the extrusion spring, affecting subsequent detection.

[0018] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical scheme, and the beneficial effects brought about by the technical features of these technical schemes, other technical problems that can be solved by a safety valve sealing detection device provided by the embodiments of the present application, other technical features included in the technical scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a first viewing angle stereoscopic structure provided according to an embodiment of the present invention is shown.

[0021] Figure 2 A schematic diagram of a second viewing angle stereoscopic structure provided according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic diagram of a main cross-sectional plane structure provided according to an embodiment of the present invention is shown.

[0023] Figure 4 Shows Figure 3 A local enlarged view of location N.

[0024] Figure 5 A schematic diagram of the top view and cross-sectional plan structure of a spray head 1, a positioning block 1 and a brush roller 1 is shown.

[0025] Figure 6 A schematic diagram of the left-side sectional plan structure of the second spray head, the second positioning block and the second brush roller is shown.

[0026] Figure 7 A schematic diagram of the three-dimensional structure of the safety valve is shown.

[0027] Figure 8 A schematic diagram of the left-side partial cross-sectional plan structure of the cylindrical groove and the contact column is shown.

[0028] Fig. 9 A schematic diagram of the cross-sectional plan structure of the air pressure control component is shown.

[0029] Fig.10 A schematic diagram of the top plan structure of the marking line and the ventilation groove is shown.

[0030] The above drawings include the following reference numerals:

[0031] 1. Fixing unit; 11. Fixing platform; 12. Stopper; 121. Rotating rod; 122. Threaded groove; 123. Extrusion block; 13. Air pressure control component; 131. Ventilation groove; 132. Air pump; 133. Intake pipe; 134. Ventilation pipe; 135. Electric pressure regulating valve; 14. Rectangular block; 16. Extrusion component; 161. Distance control cylinder 1; 162. Synchronous square rod; 163. Connecting square rod; 164. Arc block; 17. Pressing component; 17 1. Distance control cylinder 2; 172. Right angle bracket; 173. Horizontal square rod; 174. Fixed cylinder; 175. Cylindrical spring; 176. Extrusion cylinder; 177. Positioning rod; 18. Alignment member; 181. L-shaped plate; 182. Distance control cylinder 3; 183. Rectangular rod; 184. Fixed rod; 185. Circular plate; 2. Detection unit; 21. Linkage member 1; 211. Inverted L-shaped bracket; 212. Circular ring plate 1; 213. Rotating wheel; 214. Electric machine 1; 215, sprocket 1; 216, toothed chain belt 1; 22, spraying part 1; 221, liquid box 1; 222, liquid pipe 1; 223, delivery pump 1; 224, delivery pipe 1; 225, spray head 1; 226, positioning block 1; 227, brush roller 1; 23, linkage part 2; 231, annular rotating plate; 232, motor 2; 233, sprocket 2; 234, toothed chain belt 2; 24, spraying part 2; 241, liquid box 2; 242, liquid pipe 2; 243, delivery pump 2; 244, delivery pipe 2; 245, spray head 2; 246, positioning block 2; 247, brush roller 2; 251, electromagnetic plate; 252, close to circular plate; 253, insert cylinder; 254, cylindrical groove; 255, extrusion spring; 256, contact column; 257, extension column; 258, wedge block; 259, extension block; 260, concave bracket; 261, arc groove; 262, limit spring; 263, hemispherical block. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] See also Figure 1 , Figure 4 and Figure 8A safety valve sealing detection device comprises a fixing unit 1 and a detection unit 2. The detection unit 2 is arranged on the fixing unit 1 and is used to detect the sealing of the safety valve; the fixing unit 1 comprises a fixing platform 11, the upper end of the fixing platform 11 is evenly provided with circular marking lines, a limiting member 12 is arranged in the middle of the fixing platform 11, an air pressure control member 13 is arranged on the fixing platform 11, a rectangular block 14 is fixedly installed on the upper left end of the fixing platform 11, an extrusion member 16 is arranged on the right side of the rectangular block 14, a pressing member 17 is arranged on the upper left end of the fixing platform 11, and a positioning member 18 is arranged on the right side of the fixing platform 11; the detection unit 2 comprises a linkage member 21, and a linkage member 21 is arranged on the pressing member 17, The linkage part 1 21 is evenly provided with a spraying part 1 22, the alignment part 18 is provided with a linkage part 23, and the linkage part 23 is evenly provided with a spraying part 24; the left end of the alignment part 18 is evenly provided with an electromagnetic plate 251, the left end of the electromagnetic plate 251 is magnetically attracted with a close circular plate 252, the left end of the close circular plate 252 is fixedly installed with an insertion cylinder 253, and the left end of the close circular plate 252 is provided with an anti-slip part, the anti-slip part includes a cylindrical groove 254, the left end of the close circular plate 252 is evenly provided with a cylindrical groove 254 along its circumference, an extrusion spring 255 is fixedly installed in the cylindrical groove 254, and a contact column 256 is fixedly installed at the left end of the extrusion spring 255, and the contact column 256 and the cylindrical groove 254 are between the contact column 256 and the cylindrical groove 254. Sliding connection, the right end of the contact column 256 is fixedly installed with an extension column 257 that penetrates the extrusion spring 255, and the extension column 257 is slidably connected to the circular plate 252 from left to right, and the right end of the extension column 257 is fixedly installed with a wedge block 258, and the left end surface area of ​​the wedge block 258 is smaller than the right end surface area, and the arc surface of the inserted cylinder 253 is evenly slidably connected with a protruding block 259 along its circumferential direction, and the protruding block 259 is fixedly installed with a concave bracket 260 on one side facing the central axis of the inserted cylinder 253, and the end of the right vertical section of the concave bracket 260 is slidably connected with the wedge block 258, and the end of the right vertical section of the concave bracket 260 and the inclined surface of the wedge block 258 cannot be separated, and the concave The wedge-shaped bracket 260 and the close circular plate 252, as well as the concave bracket 260 and the inserted cylinder 253 are all slidably connected. Arc grooves 261 are provided on all sides of the protruding block 259. A limit spring 262 is fixedly installed in the arc groove 261. A hemispherical block 263 is fixedly connected to the end of the limit spring 262. A groove for inserting the wedge block 258 and the concave bracket 260 is provided on the close circular plate 252. A rubber suction cup (not shown in the figure) is fixedly installed on the end of the protruding block 259 facing away from the concave bracket 260. The arc surface of the inserted cylinder 253 is evenly provided with accommodating grooves along its circumference for accommodating the protruding block 259 and the hemispherical block 263 retracted into the inserted cylinder 253.

[0034] First, multiple safety valves to be tested are placed within the marking line of the fixed platform 11, and then the front and rear ends of the bottom of the safety valve are squeezed and fixed by the limiter 12, and the upper end of the safety valve is squeezed downward by the pressing member 17, and then the spraying member 22 is driven to move by the linkage member 21, so that a circle of leak detection liquid is sprayed on the surface of the connection between the valve body and the valve cover of the safety valve, and the close-fitting circular plate 252 magnetically attracted by the electromagnetic plate 251 is made to fit tightly with the right end of the safety valve through the positioning member 18, and at the same time, the insertion cylinder 253 on the close-fitting circular plate 252 is inserted into the interior of the safety valve, close to the circular plate 252 The contact column 256 on the safety valve first contacts the inner wall of the right end interface of the safety valve, and then is forced to move to the right into the cylindrical groove 254. The extrusion spring 255 is compressed, and the contact column 256 drives the extension column 257 and the wedge block 258 to move to the right together. The wedge block 258 drives the concave bracket 260 to move in a direction away from the central axis of the inserted cylinder 253, driving the extending block 259 to extend out of the inserted cylinder 253. The rubber suction cup thereon is tightly attached to the inner wall of the safety valve pipe. The hemispherical block 263 extends out of the arc groove 261 under the elastic force of the limit spring 262 to limit the extending block 259.

[0035] At this time, the linkage part 23 moves, driving the spraying part 24 to move to spray a circle of leak detection liquid on the surface of the connection between the close circular plate 252 and the safety valve, and then the power of the electromagnetic plate 251 is turned off, and the positioning part 18 drives the electromagnetic plate 251 to move to the right, and no longer squeezes the close circular plate 252, until the spraying part 24 moves away from the connection between the close circular plate 252 and the safety valve. Under the restriction of multiple hemispherical blocks 263 and the rubber suction cups on the protruding block 259, the close circular plate 252 will not be separated from the safety valve due to the reaction force of the squeezing spring 255, and the pressing part 17 moves upward, while still squeezing the upper end of the safety valve downward, driving the linkage part 1 21 and the spraying part 1 22 away from the valve body and valve cover of the safety valve.

[0036] Then, gas at the same pressure is introduced into each safety valve through the air pressure control component 13, and whether bubbles appear on the two leak detection liquid surfaces of each safety valve. If bubbles appear, the safety valve has poor sealing performance. If not, continue to introduce gas with different pressures into each safety valve through the air pressure control component 13, and the set pressure of the safety valve is within the gas pressure range of the two safety valves in the middle. Observe whether bubbles appear on the two leak detection liquid surfaces of each safety valve. If bubbles appear in the two safety valves on the rear side and no bubbles appear in the two safety valves on the front side, the sealing performance and quality of the safety valve meet the standards. Otherwise, the sealing performance and quality of the safety valve do not meet the standards.

[0037] See also Figure 2The limiting member 12 includes a rotating rod 121, an assembly groove is provided on the fixed platform 11, and the middle part of the fixed platform 11 is rotatably connected with the rotating rod 121 arranged in the front-to-back direction. The rotating rod 121 is evenly linearly arranged with a thread groove group, and the thread groove group is composed of front-to-back symmetrical thread grooves 122. The thread groove 122 is threadedly connected with an extrusion block 123, and the extrusion block 123 is slidably connected to the assembly groove on the fixed platform 11 front-to-back.

[0038] See also Figure 3 , Fig. 9 and Fig.10 The air pressure control component 13 includes a ventilation groove 131. The ventilation grooves 131 are evenly opened on the fixed platform 11. The ventilation grooves 131 are located in the middle of the thread groove group. An air pump 132 is fixedly installed on the left end of the fixed platform 11. A T-shaped air intake pipe 133 is fixedly installed at the air inlet of the air pump 132. A ventilation pipe 134 is fixedly connected between the air intake pipe 133 and the ventilation groove 131. An electric pressure regulating valve 135 is fixedly installed in the ventilation pipe 134.

[0039] See also Figure 2 and Figure 3 The extrusion member 16 includes a distance-controlling cylinder 161, a distance-controlling cylinder 161 is fixedly installed on the right end of the rectangular block 14, a synchronous square rod 162 is fixedly installed on the telescopic end of the distance-controlling cylinder 161, a connecting square rod 163 is fixedly installed along the right end of the synchronous square rod 162, and an arc block 164 is fixedly installed at the end of the connecting square rod 163.

[0040] See also Figure 2 and Figure 3 The pressing member 17 includes a second distance control cylinder 171. The second distance control cylinder 171 is symmetrically fixedly installed on the upper left side of the fixed platform 11. An L-shaped right-angle bracket 172 is fixedly installed on the top of the telescopic rod of the second distance control cylinder 171. A horizontal square rod 173 is fixedly installed at the end of the horizontal section of the right-angle bracket 172. A fixed cylinder 174 is fixedly installed uniformly along the linearity of the lower end of the horizontal square rod 173. A cylindrical spring 175 is fixedly installed at the lower end of the fixed cylinder 174. An extrusion cylinder 176 is fixedly installed at the lower end of the cylindrical spring 175. A positioning rod 177 that slides up and down and is inserted into the fixed cylinder 174 is fixedly installed on the upper end of the extrusion cylinder 176.

[0041] The synchronous square rod 162 and the connecting square rod 163 are driven to move rightward by the distance control cylinder 161, so that the arc block 164 is in close contact with the left end of the safety valve, and the right-angle bracket 172 and the horizontal square rod 173 are driven downward by the distance control cylinder 2 171, thereby driving the extrusion cylinder 176 to squeeze the upper end of the safety valve downward.

[0042] See also Figure 2The linkage member 21 includes an inverted L-shaped bracket 211, the left end of the horizontal square rod 173 is evenly fixed with the inverted L-shaped bracket 211, the lower end of the vertical section of the inverted L-shaped bracket 211 is fixed with a circular ring plate 212, the middle part of the circular ring plate 212 is rotatably connected with a rotating wheel 213, and the upper end of the horizontal section of the front right-angle bracket 172 is fixed with a motor 214 through a motor seat, and the output shaft of the motor 214 is fixed with a sprocket 215 through a coupling, and the sprocket 215 and the rotating wheel 213 are commonly connected with a toothed chain belt 216 for transmission.

[0043] See also Figure 2 , Figure 3 and Figure 5 The spraying member 22 includes a liquid box 221, a ring-shaped liquid box 221 is fixedly installed on the upper end of the rotating wheel 213, a liquid pipe 222 is fixedly installed on the upper end of the liquid box 221, a delivery pump 223 is fixedly installed on the lower end of the liquid box 221, a delivery pipe 224 is fixedly installed on the lower end of the delivery pump 223, a spray head 225 is fixedly installed on the end of the delivery pipe 224, an arc-shaped positioning block 226 is fixedly installed on the front end of the spray head 225, and a brush roller 227 is rotatably connected to the middle of the positioning block 226.

[0044] See also Figure 1 The alignment member 18 includes an L-shaped plate 181, the L-shaped plate 181 is fixedly installed on the right end of the fixed platform 11, the left end of the vertical section of the L-shaped plate 181 is fixedly installed with a distance control cylinder 3 182, the telescopic end of the distance control cylinder 3 182 is fixedly installed with a rectangular rod 183, the left end of the rectangular rod 183 is evenly fixedly installed with a fixed rod 184, the left end of the fixed rod 184 is evenly fixedly installed with a circular plate 185, and the middle part of the left end of the circular plate 185 is fixedly connected to the electromagnetic plate 251.

[0045] See also Figure 2 and Figure 3 The linkage part 23 includes an annular rotating plate 231, and the left ends of multiple circular plates 185 are rotatably connected to the annular rotating plate 231 with a cross-section of [. A motor 232 is fixedly installed on the rectangular rod 183 through a motor seat. A sprocket 233 is fixedly installed on the output shaft of the motor 232 through a coupling. The sprocket 233 and the annular rotating plate 231 are commonly connected by a toothed chain belt 234.

[0046] See also Figure 3 , Figure 4 and Figure 6The spraying part 24 includes a liquid box 241, a rectangular liquid box 241 is fixedly installed on the left end of the annular rotating plate 231, a liquid pipe 242 is fixedly installed on the upper end of the liquid box 241, and the liquid pipe 242 needs to be manually sealed with a rubber plug before the annular rotating plate 231 moves. A delivery pump 243 is fixedly installed on the lower end of the liquid box 241, a delivery pipe 244 is fixedly installed on the lower end of the delivery pump 243, a spray head 245 is fixedly installed on the end of the delivery pipe 244, and an arc-shaped positioning block 246 is fixedly installed on the front end of the spray head 245, and a brush roller 247 is rotatably connected to the middle of the positioning block 246.

[0047] Working principle of the present invention: Step 1: First, place multiple safety valves that need to be tested within the marking line of the fixed platform 11, and then drive the rotating rod 121 to rotate through an external motor, thereby driving each group of extrusion blocks 123 to move toward each other, and the front and rear ends of the bottom of the safety valve are squeezed and fixed. At the same time, the synchronous square rod 162 and the connecting square rod 163 are driven to move to the right through the distance control cylinder 161, so that the arc block 164 is in close contact with the left end of the safety valve, and the right-angle bracket 172 and the horizontal square rod 173 are driven to move downward through the distance control cylinder 2 171, thereby driving the extrusion cylinder 176 to squeeze the upper end of the safety valve downward.

[0048] Step 2: Then, the motor 214 drives the sprocket 215 to rotate. With the cooperation of the toothed chain belt 216, the rotating wheel 213 rotates accordingly, driving the spray head 225 and the brush roller 227 to rotate, spraying a circle of leak detection liquid on the surface of the connection between the valve body and the valve cover of the safety valve, and driving the rectangular rod 183 and the fixed rod 184 to move leftward through the distance control cylinder 3 182, thereby driving the circular plate 185 to move leftward, so that the electromagnetic plate 251 on the circular plate 185 is magnetically attracted to the circular plate 252 and the right end of the safety valve, and at the same time, the insertion cylinder 253 close to the circular plate 252 is inserted Inside the safety valve, the contact column 256 on the circular plate 252 first contacts the safety valve and then moves to the right into the cylindrical groove 254. The extrusion spring 255 is compressed, and the contact column 256 drives the extension column 257 and the wedge block 258 to move to the right together. The wedge block 258 drives the concave bracket 260 to move in a direction away from the central axis of the inserted cylinder 253, driving the extending block 259 to extend out of the inserted cylinder 253 and adhere to the inner wall of the safety valve pipe. The hemispherical block 263 extends out of the arc groove 261 under the elastic force of the limit spring 262 to limit the extending block 259.

[0049] Step 3: At this time, the motor 232 drives the sprocket 233 to rotate, and with the cooperation of the toothed chain belt 234, the annular rotating plate 231 rotates accordingly, driving the spray head 245 and the brush roller 247 to rotate, spraying a circle of leak detection liquid on the surface of the connection between the circular plate 252 and the safety valve, and then turning off the power of the electromagnetic plate 251, and driving the rectangular rod 183 and the fixed rod 184 to move to the right through the distance control cylinder 3 182, and no longer squeezing the circular plate 252 until the spray head 24 5 moves away from the connection between the close-fitting circular plate 252 and the safety valve. Under the restriction of the multiple hemispherical blocks 263, the close-fitting circular plate 252 will not be separated from the safety valve due to the reaction force of the squeezing spring 255. The right-angle bracket 172 and the horizontal square rod 173 are driven to move upward by one end through the control cylinder 171. Under the reaction force of the cylindrical spring 175, the squeezing cylinder 176 still squeezes the upper end of the safety valve downward. At the same time, the electric pressure regulating valve 135 controls the pressure in the vent pipe 134. The air pressure in each vent pipe 134 is ensured to be the same. The spray head 225 and the brush roller 227 are away from the connection between the valve body and the valve cover of the safety valve. Air is introduced into the air inlet pipe 133 through the air pump 132. The gas enters the vent groove 131 from the vent pipe 134 and finally enters the safety valve. Observe whether bubbles appear on the surface of the two leak detection liquids of each safety valve. If bubbles appear, the safety valve has poor sealing performance. If not, the air pressure in the vent pipe 134 is controlled by the electric pressure regulating valve 135 to ensure the ventilation. The air pressure in the air pipe 134 gradually increases from front to back. The set pressure of the safety valve is within the pressure range regulated by the two electric pressure regulating valves 135 in the middle. Air continues to be supplied to the air inlet pipe 133 through the air pump 132. The gas enters the ventilation groove 131 from the ventilation pipe 134 and finally enters the safety valve. Observe whether there are bubbles on the surface of the two leak detection liquids of each safety valve. If bubbles appear in the two safety valves on the rear side and no bubbles appear in the two safety valves on the front side, the sealing and quality of the safety valve meet the standards.

[0050] In the description of the present invention, it is necessary to understand that the terms "center", "middle", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "end", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first", "second", "number one", "number two", "one", "two" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety valve sealing detection device, characterized in that: It comprises a fixing unit (1) and a detection unit (2), wherein the detection unit (2) is arranged on the fixing unit (1) and is used to detect the sealing performance of the safety valve; The fixing unit (1) comprises a fixing platform (11), the upper end of the fixing platform (11) is evenly provided with circular marking lines, a limiting member (12) is provided in the middle of the fixing platform (11), a pneumatic control member (13) is provided on the fixing platform (11), a rectangular block (14) is fixedly installed on the upper left end of the fixing platform (11), an extrusion member (16) is provided on the right side of the rectangular block (14), a pressing member (17) is provided on the upper left end of the fixing platform (11), and a positioning member (18) is provided on the right side of the fixing platform (11); The detection unit (2) comprises a linkage member 1 (21), the lower pressing member (17) is provided with the linkage member 1 (21), a spraying member 1 (22) is evenly provided on the linkage member 1 (21), a linkage member 2 (23) is provided on the alignment member (18), and a spraying member 2 (24) is evenly provided on the linkage member 2 (23); The left end of the alignment member (18) is evenly provided with an electromagnetic plate (251), the left end of the electromagnetic plate (251) is magnetically attracted with a close-fitting circular plate (252), the left end of the close-fitting circular plate (252) is fixedly installed with an insertion cylinder (253), and the left end of the close-fitting circular plate (252) is provided with an anti-slipping member; a leak detection liquid is applied to the connection between the valve body and the valve cover of the safety valve by means of a spraying member (22), and the close-fitting circular plate (252) is driven to move to the left by means of the alignment member (18), so that the close-fitting circular plate (252) gradually extends into the inside of the sealing valve outlet and is locked, the sealing valve outlet is blocked by means of the close-fitting circular plate (252), and a leak detection liquid is applied to the connection between the sealing valve outlet and the close-fitting circular plate (252) by means of a spraying member (24), and the sealing valve is inflated by means of an air pressure control member (13), and the sealing performance of the sealing valve is judged by observing whether bubbles are generated at the position of the leak detection liquid.

2. A safety valve sealing detection device according to claim 1, characterized in that: The limiting member (12) comprises a rotating rod (121), an assembly groove is provided on the fixed platform (11), a rotating rod (121) arranged in the front-to-back direction is rotatably connected to the middle of the fixed platform (11), a thread groove group is evenly arranged along the linear direction of the rotating rod (121), the thread groove group is composed of thread grooves (122) symmetrical in the front-to-back direction, an extrusion block (123) is threadedly connected to the thread groove (122), and the extrusion block (123) is slidably connected to the assembly groove on the fixed platform (11) in the front-to-back direction.

3. A safety valve sealing detection device according to claim 1, characterized in that: The air pressure control component (13) comprises a ventilation groove (131). The ventilation grooves (131) are evenly arranged on the fixed platform (11). The ventilation grooves (131) are located in the middle of the thread groove group. An air pump (132) is fixedly installed at the left end of the fixed platform (11). A T-shaped air intake pipe (133) is fixedly installed at the air inlet of the air pump (132). A ventilation pipe (134) is fixedly connected between the air intake pipe (133) and the ventilation groove (131). An electric pressure regulating valve (135) is fixedly installed in the ventilation pipe (134).

4. A safety valve sealing detection device according to claim 1, characterized in that: The extrusion member (16) comprises a distance control cylinder (161), the right end of the rectangular block (14) is fixedly mounted with the distance control cylinder (161), the telescopic end of the distance control cylinder (161) is fixedly mounted with a synchronous square rod (162), the right end of the synchronous square rod (162) is evenly fixedly mounted with a connecting square rod (163) along its linear direction, and the ends of the connecting square rods (163) are fixedly mounted with arc blocks (164).

5. A safety valve sealing detection device according to claim 1, characterized in that: The pressing member (17) comprises a second distance control cylinder (171), which is symmetrically fixedly installed on the left upper end of the fixed platform (11) in the front and rear directions, and an L-shaped right-angle bracket (172) is fixedly installed on the top of the telescopic rod of the second distance control cylinder (171), and a horizontal square rod (173) is fixedly installed on the end of the horizontal section of the right-angle bracket (172), and a fixed cylinder (174) is fixedly installed on the lower end of the horizontal square rod (173) along the linear uniformity, and a cylindrical spring (175) is fixedly installed on the lower end of the fixed cylinder (174), and an extrusion cylinder (176) is fixedly installed on the lower end of the cylindrical spring (175), and a positioning rod (177) that slides up and down and is inserted into the fixed cylinder (174) is fixedly installed on the upper end of the extrusion cylinder (176).

6. A safety valve sealing detection device according to claim 5, characterized in that: The linkage member 1 (21) comprises an inverted L-shaped bracket (211), the left end of the horizontal square rod (173) is evenly fixedly mounted with the inverted L-shaped bracket (211), the lower end of the vertical section of the inverted L-shaped bracket (211) is fixedly mounted with a circular ring plate 1 (212), the middle part of the circular ring plate 1 (212) is rotatably connected with a rotating wheel (213), the upper end of the horizontal section of the front right-angle bracket (172) is fixedly mounted with a motor 1 (214) through a motor seat, the output shaft of the motor 1 (214) is fixedly mounted with a sprocket wheel 1 (215) through a coupling, and the sprocket wheel 1 (215) and the rotating wheel (213) are jointly transmission-connected with a toothed chain belt 1 (216).

7. A safety valve sealing detection device according to claim 6, characterized in that: The spraying component (22) comprises a liquid containing box (221), a ring-shaped liquid containing box (221) is fixedly mounted on the upper end of the rotating wheel (213), a liquid passage pipe (222) is fixedly mounted on the upper end of the liquid containing box (221), a delivery pump (223) is fixedly mounted on the lower end of the liquid containing box (221), a delivery pipe (224) is fixedly mounted on the lower end of the delivery pump (223), a spray head (225) is fixedly mounted on the end of the delivery pipe (224), an arc-shaped positioning block (226) is fixedly mounted on the front end of the spray head (225), and a brush roller (227) is rotatably connected to the middle of the positioning block (226). The structure of the spraying component (24) is the same as that of the spraying component (22), and only the installation orientation of the specific components is different.

8. A safety valve sealing detection device according to claim 1, characterized in that: The alignment member (18) comprises an L-shaped plate (181), the L-shaped plate (181) is fixedly mounted on the right end of the fixed platform (11), a distance control cylinder (182) is fixedly mounted on the left end of the vertical section of the L-shaped plate (181), a rectangular rod (183) is fixedly mounted on the telescopic end of the distance control cylinder (182), a fixed rod (184) is evenly fixedly mounted on the left end of the rectangular rod (183), a circular plate (185) is evenly fixedly mounted on the left end of the fixed rod (184), and a left end of the circular plate (185) is fixedly connected to the electromagnetic plate (251) at the middle of the left end.

9. A safety valve sealing detection device according to claim 8, characterized in that: The second linkage member (23) comprises an annular rotating plate (231), the left end of the circular plate (185) is rotatably connected to the annular rotating plate (231) with a cross section of [, a second motor (232) is fixedly mounted on the rectangular rod (183) via a motor seat, a second sprocket (233) is fixedly mounted on the output shaft of the second motor (232) via a coupling, and a second toothed chain belt (234) is commonly connected to the second sprocket (233) and the annular rotating plate (231) for transmission.

10. A safety valve sealing detection device according to claim 1, characterized in that: The anti-dropping member comprises a cylindrical groove (254), which is evenly provided along the circumference of the circular plate (252) and is closely attached to the left end thereof; a pressing spring (255) is fixedly installed in the cylindrical groove (254); a contact column (256) is fixedly installed at the left end of the pressing spring (255); the contact column (256) is slidably connected to the cylindrical groove (254); an extension column (257) penetrating the pressing spring (255) is fixedly installed at the right end of the contact column (256); The extension column (257) is connected to the circular plate (252) by sliding left and right, a wedge block (258) is fixedly installed on the right end of the extension column (257), the left end surface area of ​​the wedge block (258) is smaller than the right end surface area, the arc surface of the insertion cylinder (253) is evenly slidably connected with a protruding block (259) along its circumferential direction, and a concave bracket (260) is fixedly installed on the side of the protruding block (259) facing the central axis of the insertion cylinder (253), and the right side of the concave bracket (260) is fixedly installed with the concave bracket (260). The end of the side vertical section is slidably connected to the wedge block (258), the end of the right vertical section of the concave bracket (260) and the inclined surface of the wedge block (258) cannot be separated, the concave bracket (260) and the close-fitting circular plate (252) and the concave bracket (260) and the inserted cylinder (253) are all slidably connected, and the protruding block (259) is provided with an arc groove (261) around it, and a limit spring (262) is fixedly installed in the arc groove (261). The end of the spring (262) is fixedly connected with a hemispherical block (263), and a groove for receiving the wedge block (258) and the concave bracket (260) is provided on the circular plate (252) close to the circular plate. A rubber suction cup is fixedly installed on the end of the protruding block (259) facing away from the concave bracket (260), and the arc surface of the inserted cylinder (253) is uniformly provided with accommodating grooves along its circumference for accommodating the protruding block (259) and the hemispherical block (263) retracted into the inserted cylinder (253).

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