CN216479490U - Sealing test system of safety valve and plugging device thereof - Google Patents

Abstract

The utility model relates to a sealing test system of relief valve and plugging device thereof, with the external screw thread fit on internal thread on the elasticity subassembly and the linking arm, through rotating the elasticity subassembly, utilize the screw-thread fit of internal thread and external screw thread to drive the linking arm and remove in the mounting groove that corresponds, and then make connecting portion and flange terminal surface tighten up or relax. Meanwhile, the second flow guide through hole is communicated with the first flow guide through hole, so that the leaked test gas can be led out; also make second connecting hole and first connecting hole intercommunication, and then can utilize the fastening cooperation of fastener and first connecting hole and second connecting hole to with elasticity subassembly, linking arm, shutoff piece and flange terminal surface stable, reliable even as an organic whole, make plugging device can be stable, reliable carry out the shutoff to gas outlet department, can adapt to the inspection requirement of the relief valve of different specifications, the commonality is strong, the inspection cost is reduced, and can realize standardized inspection operation, and inspection efficiency is high.

Description

Sealing test system of safety valve and plugging device thereof

Technical Field

The utility model relates to an instrument detection technical field especially relates to a sealing test system of relief valve and plugging device thereof.

Background

The safety valve is used as an important safety protection element in pressure-bearing equipment and is widely applied to the industries of chemical engineering, gas and the like. When the pressure in the equipment rises to exceed the opening pressure of the safety valve, the safety valve can be automatically opened to release the pressure, and when the pressure in the equipment drops to a safety value, the safety valve can be automatically closed to prevent leakage.

In order to ensure the reliability of the operation of the safety valve, the sealing performance of the safety valve needs to be checked at the time of shipment, and the sealing performance of the safety valve needs to be regularly checked in the later use process. The traditional inspection mode is to let in test gas into the relief valve, and the test gas that utilizes the pipe to leak out the gas outlet department of relief valve is leading-in aquatic to check the leakage rate of relief valve, and then whether the leakproofness that obtains the relief valve is qualified. The traditional inspection mode avoids the junction of the gas outlet of pipe and relief valve to take place to leak, adopts the mode that blanking cover combines clamp or bolt to carry out the shutoff and connects, when the specification of relief valve changes, needs corresponding not unidimensional blanking cover, clamp or the bolt of changing, has not only increased inspection cost, can't realize standardized inspection operation moreover, influences inspection efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a sealing test system for a safety valve and a plugging device therefor, which are directed to problems that the inspection cost is high and standardized inspection work cannot be performed.

The technical scheme is as follows:

in one aspect, a plugging device for a safety valve is provided, comprising:

the sealing and plugging device comprises a sealing and plugging piece and a sealing and plugging piece, wherein the sealing and plugging piece is provided with a plugging side and an installation side which are oppositely arranged, and a first flow guide through hole which penetrates through the plugging side and the installation side;

one end of each connecting arm is provided with a connecting part used for being connected with a safety valve, the other ends of the at least two connecting arms are movably arranged in the mounting groove in a one-to-one correspondence mode, and one side, away from the mounting side, of each connecting arm is provided with an external thread;

the elastic component is provided with a second flow guide through hole correspondingly communicated with the first flow guide through hole, a second connecting hole correspondingly communicated with the first connecting hole and an internal thread in threaded fit with the external thread; and

and the fastener is used for being tightly matched with the first connecting hole and the second connecting hole.

The technical solution is further explained below:

in one embodiment, the mounting side includes a parallel surface parallel to the plugging side and an inclined surface inclined with respect to the parallel surface, the first flow guide through hole penetrates through the parallel surface, the parallel surface is provided with the first connection hole, the inclined surface is arranged around the circumference of the parallel surface, and the inclined surface and the parallel surface are provided with the mounting groove.

In one embodiment, in the radial direction of the first flow guide through hole, the distance from the axial direction of the first flow guide through hole to the blocking side of the inclined surface decreases progressively along the direction away from the first flow guide through hole.

In one embodiment, the tightening and loosening assembly comprises a rotary disc and a pressure plate, the rotary disc is provided with a mounting through hole and the internal thread, the pressure plate is provided with the second flow guide through hole and the second connecting hole, the pressure plate is arranged in the mounting through hole, and the pressure plate can be in press fit with the rotary disc.

In one embodiment, the turntable is provided with a first pressing part, and the pressing disc is provided with a second pressing part which is used for pressing and matching with the first pressing part.

In one embodiment, the first pressing portion includes a pressing boss disposed in the mounting through hole and connected to an inner side wall of the mounting through hole, and the second pressing portion includes a pressing flange disposed on a circumferential side wall of the pressure plate, and the pressing flange can be in pressing fit with the pressing boss.

In one embodiment, an auxiliary force application member is arranged on one side of the rotary disc, which faces away from the plugging member.

In one embodiment, the plugging device of the safety valve further comprises an elastic sealing element, the elastic sealing element is provided with a third flow guide through hole correspondingly communicated with the first flow guide through hole, and the elastic sealing element is attached to the plugging side; and/or the plugging device of the safety valve further comprises a connecting joint, and the connecting joint is used for sealing and matching the guide pipe with the second flow guiding through hole.

On the other hand, the sealing test system of the safety valve comprises a guide pipe and the plugging device, wherein one end of the guide pipe is in plug-in fit with the first flow guide through hole and the second flow guide through hole.

In one embodiment, the sealing test system of the safety valve further includes a flow detection element and a bubble counting assembly, the conduit has an air inlet end inserted into the first flow guiding through hole and the second flow guiding through hole and an air outlet end extending below the liquid level, the flow detection element is used for detecting the flow in the conduit, and the bubble counting assembly is used for detecting and counting the number of bubbles at the air outlet end.

The sealing test system of the safety valve and the plugging device thereof can meet the inspection requirements of safety valves of different specifications, have strong universality, reduce the inspection cost, realize standardized inspection operation and have high inspection efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a seal testing system for a safety valve according to an embodiment;

FIG. 2 is a schematic diagram of the configuration of a plugging device of the seal testing system of the safety valve of FIG. 1;

FIG. 3 is a cross-sectional view of the occluding device A-A of FIG. 2;

figure 4 is an exploded view of the occluding device of figure 2;

fig. 5 is a schematic view of the structure of a closure of the closure device of fig. 2;

FIG. 6 is a schematic structural view of a turntable of the occlusion device of FIG. 2;

fig. 7 is a schematic structural view of a platen of the plugging device of fig. 2.

Description of reference numerals:

10. a safety valve; 111. an air inlet; 12. an air outlet; 13. a flange end face; 100. a plugging device; 110. a blocking member; 111. plugging the side; 112. a mounting side; 1121. a parallel plane; 1122. an inclined surface; 113. a first flow guide through hole; 114. mounting grooves; 115. a first connection hole; 120. a connecting arm; 121. a connecting portion; 122. an external thread; 130. a take-up assembly; 131. a second flow guide through hole; 132. a second connection hole; 133. a turntable; 1331. mounting a through hole; 1332. a first pressing part; 1333. an auxiliary force application member; 1334. an internal thread; 134. a platen; 1341. a second pressing part; 140. a fastener; 150. an elastomeric seal; 151. a third flow guide through hole; 160. connecting a joint; 200. a leak rate detection device; 210. a conduit; 211. an air inlet end; 212. an air outlet end; 2121. bending sections; 220. a flow rate detecting element; 230. a bubble counting assembly; 231. a laser transmitting end; 232. a laser receiving end; 240. a container; 250. a timing element; 260. a display element.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1, when the tightness of the safety valve 10 is detected, the safety valve 10 can be stably and reliably fixed by using a clamping element such as a clamp on a test bed, and then a test gas is introduced into the gas inlet 111 of the safety valve 10 by using an element such as a gas cylinder or a gas pump, and the tightness of the safety valve 10 is determined by calculating the leakage rate of the test gas leaked from the gas outlet 12 of the safety valve 10, and then the safety valve 10 is determined to be qualified.

As shown in fig. 1, wherein the outlet 12 of the safety valve 10 is disposed on a flange end face 13 of the valve body.

As shown in fig. 1, in one embodiment, a leak testing system for a safety valve 10 is provided, which includes a plugging device 100 for the safety valve 10 and a leak rate detection device 200 for the safety valve 10. In this way, the plugging device 100 is used to realize reliable sealing connection between the gas outlet 12 of the safety valve 10 and the leakage rate detection device 200, so that the leakage rate at the gas outlet 12 can be accurately and reliably detected, and the accuracy of the test result is ensured.

Optionally, the blocking device 100 of the safety valve 10 is used for blocking the gas outlet 12 of the safety valve 10, so that the test gas leaking from the gas outlet 12 can completely enter the leakage rate detection device 200 and cannot leak into the external environment, and the accuracy of the test result is ensured.

As shown in fig. 2 to 4, in particular, the blocking device 100 of the safety valve 10 includes a blocking piece 110, at least two connecting arms 120, a tightening unit 130, and a fastener 140.

As shown in fig. 5, the closing member 110 has a closing side 111 for abutting against the flange end face 13 of the safety valve 10, and a mounting side 112 provided opposite to the closing side 111. Furthermore, the block piece 110 is provided with a first flow guiding through hole 113 penetrating the block side 111 and the mounting side 112. In this way, the plugging side 111 can communicate with the gas outlet 12 by the first flow guide through hole 113 after being attached to the flange end face 13, and can lead out the leaked test gas.

In addition, the mounting side 112 is provided with a first connection hole 115 and at least two mounting grooves 114 arranged around the circumferential direction of the first flow guiding through hole 113 at intervals. And, each mounting groove 114 extends from an outer edge of the mounting side 112 toward the first guide through hole 113. Moreover, each mounting groove 114 is spaced apart from the first guide through hole 113, i.e., each mounting groove 114 is not communicated with the first guide through hole 113.

In addition, the specific number of the mounting slots 114 can be flexibly designed or adjusted according to the actual use situation, and may be, for example, two, three, four or more. The mounting groove 114 may be a strip-shaped groove and may extend from an outer edge of the block piece 110 toward a central position. The outer edge may refer to a circumferential side wall where the outer contour is located.

The blocking member 110 may have a plate-like structure, a disc-like structure, or the like.

As shown in fig. 4, one end of each connecting arm 120 is provided with a connecting portion 121, so that stable and reliable connection and fixation can be achieved by using the connecting portion 121 and the flange end surface 13 where the air outlet 12 is located. Furthermore, all the connecting portions 121 can enclose a connecting space matching the outer contour of the flange end face 13.

The connecting arm 120 may be a bar, a rod, or the like.

In addition, at least two connecting arms 120 are provided in one-to-one correspondence with the mounting slots 114. Also, the other end of each connecting arm 120 is movably disposed in the corresponding mounting groove 114, i.e., the connecting arm 120 can be reciprocally moved in the extending direction (as shown in the D direction of fig. 5) of the corresponding mounting groove 114. Furthermore, each connecting arm 120 is provided with an external thread 122 on the side facing away from the mounting slot 114, the external thread 122 on the respective connecting arm 120 forming an external thread 122 structure.

Preferably, the first flow guiding through hole 113 is opened at the central position of the mounting side 112, at least two mounting grooves 114 are circumferentially uniformly spaced around the mounting grooves 114, and the connection between the two connecting arms 120 and the flange end surface 13 is combined, so that the plugging piece 110 is subjected to uniform acting force to enable the plugging side 111 and the flange end surface 13 to be tightly attached, and leakage caused by a gap between the plugging side 111 and the flange end surface 13 is avoided.

As shown in fig. 4, the tightening unit 130 is provided with a second guide through hole 131, a second connection hole 132, and an internal thread 1334 threadedly engaged with the external thread 122. Therefore, the internal thread 1334 of the tightening assembly 130 is in threaded fit with the external thread 122 of the connecting arm 120, and by rotating the tightening assembly 130, the internal thread 1334 is in threaded fit with the external thread 122, so as to drive the connecting arm 120 to move in the corresponding mounting groove 114, and further to tighten or loosen the connecting part 121 and the flange end face 13. Meanwhile, the second flow guide through hole 131 is communicated with the first flow guide through hole 113, so that the leaked test gas can be led out; the second connection hole 132 is communicated with the first connection hole 115, and the fastening member 140 can be tightly fitted with the first connection hole 115 and the second connection hole 132, so that the elastic member 130, the connection arm 120, the blocking member 110 and the flange end surface 13 are stably and reliably connected into a whole, and the air outlet 12 can be stably and reliably blocked by the blocking device 100.

As shown in fig. 3, the fastening engagement of the fastening member 140 with the first connecting hole 115 and the second connecting hole 132 can be achieved by means of a plug-in engagement or a screw-thread engagement, and it is only necessary to stably and reliably connect the elastic member 130, the connecting arm 120 and the blocking member 110 into a whole.

Alternatively, the first connecting hole 115 and the second connecting hole 132 are both jacks, and the fastening member 140 is a bolt, so that the tightening unit 130, the connecting arm 120 and the blocking member 110 are stably and reliably connected into a whole by the insertion fit of the bolt and the jack.

Alternatively, the first connecting hole 115 and the second connecting hole 132 are both threaded holes, and the fastening member 140 is a threaded member such as a bolt or a screw, and the threaded member is engaged with the threaded holes, so as to stably and reliably connect the tightening unit 130, the connecting arm 120 and the blocking member 110 into a whole.

Thus, when the specification of the safety valve 10 changes and becomes larger, each connecting arm 120 can move towards the direction of moving out of the corresponding mounting groove 114 by rotating the tightening assembly 130, so that the length of each connecting arm 120 extending into the corresponding mounting groove 114 is shortened, the connecting space formed by enclosing one end of each connecting arm 120 provided with the connecting part 121 becomes larger, and the connecting space can adapt to the larger of the safety valve 10, and then each connecting arm 120 moves towards the direction of moving into the corresponding mounting groove 114 in the corresponding mounting groove 114 by rotating the tightening assembly 130, so that the length of each connecting arm 120 extending into the corresponding mounting groove 114 is increased, so that the connecting part 121 and the enlarged flange end face 13 can be stably and reliably fixedly connected, and finally, the tightening assembly 130, the tightening assembly 120, the connecting assembly and the enlarged flange end face 13 are in a fastening fit with the fastening part 140 and the first connecting hole 115 and the second connecting hole 132 The connecting arm 120, the plugging piece 110 and the flange end face 13 are stably and reliably connected into a whole, so that the gas outlet 12 is plugged, test gas leaked from the gas outlet 12 can only flow out through the first flow guide through hole 113 and the second flow guide through hole 131, and the accuracy of a test result is ensured.

Thus, when the specification of the safety valve 10 changes and becomes smaller, each connecting arm 120 can move in the corresponding mounting groove 114 towards the direction of moving into the mounting groove 114 by rotating the tightening assembly 130, so that the length of each connecting arm 120 extending into the corresponding mounting groove 114 is longer, and the connecting space formed by enclosing one end of each connecting arm 120 provided with the connecting part 121 becomes smaller, and thus the safety valve 10 can be adapted to become smaller, further, each connecting arm 120 can continuously move in the corresponding mounting groove 114 towards the direction of moving into the mounting groove 114 by further rotating the tightening assembly 130, so that the length of each connecting arm 120 extending into the corresponding mounting groove 114 is continuously longer, and thus the connecting part 121 and the reduced flange end face 13 can be stably and reliably fixedly connected, and finally, the fastening fit between the fastening part 140 and the first connecting hole 115 and the second connecting hole 132 is realized, therefore, the elastic component 130, the connecting arm 120, the plugging piece 110 and the flange end face 13 are stably and reliably connected into a whole, the gas outlet 12 is plugged, test gas leaked from the gas outlet 12 can only flow out through the first flow guide through hole 113 and the second flow guide through hole 131, and the accuracy of a test result is ensured.

The plugging device 100 of the safety valve 10 of the above embodiment can meet the inspection requirements of safety valves 10 of different specifications, has strong versatility, reduces the inspection cost, can realize standardized inspection operation, and has high inspection efficiency.

The connection between the connection portion 121 and the flange end face 13 can be realized by clamping or inserting.

Alternatively, the connecting portion 121 may be a hook, so that at least two hooks are engaged with the flange end surface 13 in the circumferential direction, and then the fastening member 140 is engaged with the first connecting hole 115 and the second connecting hole 132 in a fastening manner, so as to stably and reliably connect the elastic member 130, the connecting arm 120, the blocking member 110 and the flange end surface 13 into a whole, thereby blocking the air outlet 12.

In addition, in order to make the movement of the connection arm 120 in the mounting groove 114 smoother.

As shown in fig. 5, the mounting side 112 may alternatively include a parallel surface 1121 parallel to the blocking side 111 and an inclined surface 1122 obliquely arranged with respect to the parallel surface 1121.

Specifically, the first flow guiding through hole 113 penetrates the parallel surface 1121 and the blocking side 111. The parallel surface 1121 is provided with a first connection hole 115. The inclined surface 1122 is disposed around the circumference of the parallel surface 1121. In this way, the parallel surface 1121 can be provided at the middle position of the mounting side 112, and the inclined surface 1122 can be provided in the outer circumferential direction of the mounting side 112.

The inclined surface 1122 and the parallel surface 1121 are provided with mounting grooves 114. Thus, the extending trace line of the mounting groove 114 is inclined relative to the parallel surface 1121, and after the connecting arm 120 extends into the mounting groove 114, the connecting arm 120 is inclined relative to the parallel surface 1121, so that when the connecting arm 120 moves into or out of the mounting groove 114, the connecting arm can be connected with the outer edge of the flange end surface 13 by using the connecting part 121, and the connection requirements of the safety valves 10 of different specifications can be met.

The included angle between the inclined surface 1122 and the parallel surface 1121 can be flexibly designed or adjusted according to actual use requirements, and only the connection arm 120 can be connected and fixed with the flange end surface 13.

Specifically, in the radial direction of the first fluid passage hole 113, the distance (indicated by the length L in fig. 3) from the axial direction (indicated by the direction B in fig. 3) of the first fluid passage hole 113 to the plugging side 111 decreases in the direction away from the first fluid passage hole 113 (indicated by the direction C in fig. 3). Thus, when the connecting arms 120 are moved into or out of the mounting groove 114, the connecting space formed by enclosing the end of each connecting arm 120 provided with the connecting portion 121 can be always matched with the outer contour of the flange end face 13, and each connecting portion 121 can be stably and reliably connected and fixed with the flange end face 13. Moreover, each connecting arm 120 is inclined towards the flange end face 13, which contributes to the reliability of the connection between the connecting arm 120 and the flange end face 13 and prevents the connecting arm from loosening.

In order to adjust the position of the connecting arm 120 in the mounting groove 114 by using the tightening unit 130, and further to meet the plugging requirements of safety valves 10 of different specifications, the tightening unit 130 may be disk-shaped or table-shaped as a whole.

As shown in fig. 3 and 4, the take-up assembly 130 optionally includes a turntable 133 and a platen 134.

As shown in fig. 6, the rotary plate 133 is provided with a mounting through hole 1331 and an internal thread 1334. The pressure plate 134 has a second fluid passage 131 and a second connection hole 132.

As shown in fig. 3, specifically, the pressure plate 134 is disposed in the mounting through hole 1331, and the pressure plate 134 can be press-fitted against the turntable 133. Thus, when the specification of the safety valve 10 changes, the fastener 140 can be firstly utilized to pass through the second connecting hole 132 and the first connecting hole 115 to realize the initial fixation of the pressure plate 134 and the plugging member 110, at this time, the pressure plate 134 does not abut against the rotating disc 133 in a press fit manner, and then the rotating disc 133 can smoothly rotate relative to the pressure plate 134 and the plugging member 110. By rotating the rotary disc 133, the internal thread 1334 on the rotary disc 133 is matched with the external thread 122 on the connecting arm 120, so that the connecting arm 120 moves out of or into the mounting groove 114, and the size of the connecting space formed by enclosing the end of the connecting part 121 on all the connecting arms 120 is adjusted until the size of the connecting space is matched with the external contour of the flange end face 13. Finally, the fastening fitting of the fastening member 140 with the second connection hole 132 and the first connection hole 115 is utilized, so that the pressing plate 134 is in abutting press fitting with the rotating disc 133, the pressing plate 134, the rotating disc 133, the plugging member 110, each connection arm 120 and the flange end face 13 are stably and reliably connected into a whole, and the connection arms 120 and the flange end face 13 can be prevented from loosening. When the specification of the safety valve 10 changes again, it is only necessary to release the fastening fit of the fastening member 140 with the second connection hole 132 and the first connection hole 115, so that the pressing fit of the pressure plate 134 with the rotary disk 133 is released, and further, the rotary disk 133 can smoothly rotate, so that the connection arm 120 can move out of or into the mounting groove 114 to adjust the size of the connection space again.

As shown in fig. 4, 6 and 7, optionally, the turntable 133 is provided with a first pressing portion 1332, and the platen 134 is provided with a second pressing portion 1341 for pressing fit with the first pressing portion 1332. Thus, when the fastening member 140 is fastened and fitted with the second connection hole 132 and the first connection hole 115, the second pressing portion 1341 applies pressing force to the first pressing portion 1332, so that the pressing plate 134 and the rotating disc 133 are connected into a whole, and the pressing plate 134, the rotating disc 133, the plugging member 110, the connection arms 120 and the flange end face 13 are stably and reliably connected into a whole by combining the fastening member 140 with the fastening and fitting of the second connection hole 132 and the first connection hole 115.

Specifically, the first pressing portion 1332 includes an abutting boss disposed in the mounting through hole 1331 and connected with an inner sidewall of the mounting through hole 1331. The second pressing portion 1341 includes a pressing flange provided to a circumferential side wall of the platen 134. Thus, when the fastening member 140 is tightly fitted with the second connection hole 132 and the first connection hole 115, the abutting flange abuts against the abutting boss, so that the platen 134, the turntable 133, the plugging member 110, each connection arm 120 and the flange end face 13 can be stably and reliably connected into a whole. When the abutting flange abuts against and is abutted against the abutting boss, the rotation of the turntable 133 relative to the pressure plate 134 can be further limited by using the friction force between the abutting flange and the abutting boss, and the connecting arm 120 and the flange end face 13 are prevented from loosening.

The turntable 133 is rotated more smoothly and with less effort.

As shown in fig. 3, 4 and 6, optionally, an auxiliary force application member 1333 is disposed on a side of the rotating disc 133 facing away from the plugging member 110. Therefore, the rotating disc 133 can be driven to rotate relative to the pressure disc 134 and the plugging member 110 by applying force to the auxiliary force applying member 1333, so that the rotating disc 133 can rotate more conveniently and more labor-saving.

The auxiliary force application member 1333 may be a handle, a grip, or other structures for facilitating force application. The auxiliary force application member 1333 may be integrally formed with the turntable 133 or may be assembled by screwing after being separately formed.

In addition, in order to ensure that the plugging side 111 and the flange end face 13 are attached to each other more tightly without causing leakage, surface treatment may be used, and a sealing element may be additionally disposed between the plugging side 111 and the flange end face 13.

As shown in fig. 3 and 6, the plugging device 100 of the safety valve 10 optionally further comprises an elastic seal 150.

As shown in fig. 4, the elastic sealing member 150 is provided with a third flow guide through hole 151 correspondingly communicating with the first flow guide through hole 113. In this way, the leaked test gas is guided out by the communication between the third flow guiding through hole 151, the first flow guiding through hole 113 and the second flow guiding through hole 131, which are communicated with each other, and the gas outlet 12. The elastic seal 150 is attached to the sealing side 111. So, elastic sealing element 150 is located between shutoff side 111 and the flange terminal surface 13, when connecting arm 120 moved into the mounting groove 114 in for shutoff side 111 applys the extrusion force towards flange terminal surface 13 to elastic sealing element 150 and makes elastic sealing element 150 warp, and then makes the laminating of shutoff side 111 and flange terminal surface 13 inseparabler, can not have the gap, avoids revealing.

The elastic sealing member 150 may be made of rubber or silicone.

In addition, when the test gas leaked from the gas outlet 12 is guided by inserting the guide pipe 210 into the second guide through hole 131, the leakage does not occur at the connection position of the guide pipe 210 and the second guide through hole 131.

As shown in fig. 1, optionally, the occlusion device 100 of the safety valve 10 further comprises a connection fitting 160. Therefore, the connecting joint 160 is used for sealing and matching the conduit 210 with the second flow guiding through hole 131, and leakage caused by clearance is avoided.

The connector fitting 160 may be a ferrule-type fitting or a sleeve-type fitting, among other things.

As shown in fig. 1, in one embodiment, a leakage rate detection apparatus 200 of the safety valve 10 is provided, so that the leakage rate detection apparatus 200 using the safety valve 10 can quantitatively detect the leaked test gas.

As shown in fig. 1, the leak rate detection apparatus 200 of the safety valve 10 optionally includes a conduit 210, a flow rate detection element 220, and a bubble counter assembly 230.

As shown in fig. 1, wherein the conduit 210 has opposite gas inlet and outlet ends 211 and 212.

As shown in fig. 1, in particular, the inlet end 211 can be inserted into the second, first and third flow guide through holes 131, 113 and 151 to be in sealed communication with the gas outlet 12, so as to guide the test gas leaked from the gas outlet 12. The gas outlet 212 can extend below the liquid level to vent leaked test gas into a liquid such as water.

Alternatively, the conduit 210 may be in the form of a hose.

In which the flow rate of the test gas in the duct 210 is detected by the flow rate detecting element 220, so that the amount of the test gas leaked out can be acquired.

The flow detecting element 220 may be a flow sensor or other element capable of detecting the flow of the test gas.

Optionally, the flow detecting element 220 is a micro flow meter, so that even if the leakage amount of the test gas is small, the flow of the test gas can be accurately detected by the micro flow meter, and the accuracy of the detection result is ensured.

The bubble counting assembly 230 is used to detect and count the number of bubbles at the air outlet end 212 below the liquid level, and also can detect the amount of the leaked test gas.

The traditional test mode is to calculate the number of bubbles in unit time at the gas outlet end 212 to determine whether the sealing performance of the safety valve 10 is qualified, when the leakage amount of the test gas is large, continuous bubbling behavior occurs at the gas outlet end 212, and the continuous bubbles cause errors in the statistics of the number of bubbles, so that the detection result is influenced. Especially, when counting the number of bubbles by manual observation, the counting is not performed due to the continuous bubbles, and when the bubbles are discontinuous and uneven, the counting error is easily caused by the manual observation.

The leakage rate detection device 200 of the safety valve 10 according to the above embodiment can not only detect the leakage amount of the test gas by using the flow rate detection element 220, but also detect the leakage amount of the test gas by using the bubble counting assembly 230, thereby ensuring the accuracy of the detection result and accurately determining whether the sealing performance of the safety valve 10 is qualified. Meanwhile, compared with a manual observation mode, the method is not interfered by continuous bubbles, counting errors do not exist, and the detection result is accurate and reliable.

Specifically, when the leakage amount of the test gas is large, whether the leak tightness of the safety valve 10 is qualified or not can be judged by using the leakage amount detected by the flow detection element 220, so that the influence caused by continuous bubbles is eliminated, and the accuracy of the detection result is ensured; when the leakage amount of the test gas is small, whether the sealing performance of the safety valve 10 is acceptable or not can be judged by using the leakage amount detected by the bubble counting assembly 230. Of course, when the leakage amount of the test gas is small, the leakage amount detected by the flow detection element 220 and the leakage amount detected by the bubble counting assembly 230 can be combined to jointly determine whether the sealing performance of the safety valve 10 is qualified, so that the influence of errors can be eliminated, and the determination result is more accurate.

As shown in fig. 1, the leak rate detection apparatus 200 of the safety valve 10 optionally further includes a container 240 for holding water. The air outlet end 212 extends into the container 240 and is located below the liquid level, so that the test gas flowing out from the air outlet end 212 can generate bubbles in the water, and the bubbles generated in the container 240 can be detected and counted by the bubble counting assembly 230.

The container 240 may be a measuring cup or other device capable of containing water.

To facilitate the gas outlet end 212 extending into the container 240 and extending below the liquid surface.

As shown in fig. 1, optionally, the air outlet end 212 is provided with a bent section 2121 for extending into the container 240. Thus, the bent section 2121 is bent towards the inside of the container 240, so that the air outlet end 212 can extend into the container 240 and extend to the lower part of the liquid level, and the number of bubbles can be counted conveniently.

The bubble counting assembly 230 may adopt a laser counting method, or may adopt other existing elements capable of detecting and counting the number of bubbles.

As shown in fig. 1, the bubble counting assembly 230 optionally includes a laser transmitter 231 and a laser receiver 232 disposed at opposite intervals. The laser transmitter 231 and the laser receiver 232 are respectively disposed on two sides of the container 240. The laser transmitter 231 and the laser receiver 232 are both located below the liquid level. Thus, when the laser signal sent by the laser sending end 231 is blocked and the laser receiving end 232 does not receive the laser signal, it indicates that bubbles are generated and pass through, so that the bubbles can be counted; when the laser receiving end 232 receives the laser signal from the laser transmitting end 231, it indicates that no bubble is generated or the bubble has passed through.

The laser transmitting end 231 and the laser receiving end 232 may be in the form of probes.

As shown in fig. 1, the laser transmitter 231 and the laser receiver 232 are flush with the gas outlet end 212, i.e. the laser transmitter 231, the laser receiver 232 and the gas outlet end 212 are located on the same horizontal plane. Therefore, the bubbles emerging from the air outlet end 212 can be timely and accurately detected and counted.

In addition, in order to ensure the fairness of the detection results.

As shown in fig. 1, the bubble counting assembly 230 may further include a recording element (not shown) and a timing element 250. The flow rate detecting element 220, the laser transmitter 231, the laser receiver 232 and the timing element 250 are all electrically connected to the recording element. Therefore, the flow of the test gas detected by the flow detection element 220 is recorded by the recording element, the number of bubbles detected by the laser transmitting end 231 and the laser receiving end 232 is recorded by the recording element, and the timing of the timing element 250 is combined, so that the leakage rate of the test gas in unit time can be automatically obtained, whether the sealing performance of the safety valve 10 is qualified or not can be accurately judged, the data is prevented from being changed artificially, and the accuracy and the fairness of the detection result are ensured.

The recording element may be a component having a recording function, such as a single chip microcomputer (mcu), a Programmable Logic Controller (PLC), or the like.

The timing element 250 may be an element having a timing function, such as a timer.

The electric connection mode can be realized by adopting a wired connection mode such as a data line and the like, and can also be realized by adopting a wireless connection mode such as Bluetooth transmission and the like.

As shown in fig. 1, further, the leakage rate detection apparatus 200 of the safety valve 10 further includes a display element 260. The display element 260 is electrically connected to the recording element. Thus, the display element 260 can be used for visually displaying relevant data (such as time, leakage amount and leakage rate), so that the detection personnel can conveniently control the detection condition in real time.

The display element 260 may be a display screen or other elements with display function.

Optionally, the leakage rate detection device 200 of the safety valve 10 further comprises an alarm element (not shown). Wherein, the alarm element is electrically connected with the recording element. Therefore, according to the data recorded by the recording element, when the sealing performance of the safety valve 10 is judged to be unqualified, the alarm element can send an alarm signal to the outside to remind a detection person.

The alarm element may be a buzzer or other device capable of emitting sound alarm signals, or may be a warning lamp or other device capable of emitting light alarm signals.

Of course, the laser transmitter 231, the laser receiver 232, the recording element, the timing element 250, the display element 260 and the alarm element may be integrated on a working table or an operation table.

The "certain body" and the "certain portion" may be a part corresponding to the "member", that is, the "certain body" and the "certain portion" may be integrally formed with the other part of the "member"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.

It should be noted that, the components included in the "unit", "assembly", "mechanism" and "device" of the present application can also be flexibly combined, i.e., can be produced in a modularized manner according to actual needs, so as to facilitate the modularized assembly. The division of the above-mentioned components in the present application is only one example, which is convenient for reading and is not a limitation to the protection scope of the present application, and the same functions as the above-mentioned components should be understood as equivalent technical solutions in the present application.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is regarded as "fixed transmission connection" another element, the two elements may be fixed in a detachable connection manner or in a non-detachable connection manner, and power transmission can be realized, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be realized in the prior art, and is not burdensome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A plugging device for a safety valve, comprising:

the sealing and plugging device comprises a sealing and plugging piece and a sealing and plugging piece, wherein the sealing and plugging piece is provided with a plugging side and an installation side which are oppositely arranged, and a first flow guide through hole which penetrates through the plugging side and the installation side;

one end of each connecting arm is provided with a connecting part used for being connected with a safety valve, the other ends of the at least two connecting arms are movably arranged in the mounting groove in a one-to-one correspondence mode, and one side, away from the mounting side, of each connecting arm is provided with an external thread;

the elastic component is provided with a second flow guide through hole correspondingly communicated with the first flow guide through hole, a second connecting hole correspondingly communicated with the first connecting hole and an internal thread in threaded fit with the external thread; and

and the fastener is used for being tightly matched with the first connecting hole and the second connecting hole.

2. The plugging device for a safety valve according to claim 1, wherein said mounting side includes a parallel surface parallel to said plugging side and an inclined surface inclined with respect to said parallel surface, said first fluid guiding through hole penetrates said parallel surface, said parallel surface is provided with said first connecting hole, said inclined surface is disposed around a circumference of said parallel surface, and said mounting groove is provided on said inclined surface and said parallel surface.

3. The plugging device for a safety valve according to claim 2, wherein a distance from an axial direction of the first flow guide through hole to the plugging side of the inclined surface decreases in a direction away from the first flow guide through hole in a radial direction of the first flow guide through hole.

4. The plugging device for a safety valve according to claim 1, wherein the tightening assembly comprises a rotary disc and a pressure disc, the rotary disc is provided with a mounting through hole and the internal thread, the pressure disc is provided with the second flow guiding through hole and the second connecting hole, the pressure disc is arranged in the mounting through hole, and the pressure disc can be in press fit with the rotary disc.

5. The plugging device for a safety valve according to claim 4, wherein said rotary disk is provided with a first pressing portion, and said pressure plate is provided with a second pressing portion for press-fitting with said first pressing portion.

6. The plugging device for a safety valve according to claim 5, wherein the first pressing portion includes an abutting boss provided in the mounting through hole and connected to an inner side wall of the mounting through hole, and the second pressing portion includes a pressing flange provided on a circumferential side wall of the pressure plate, the pressing flange being capable of being press-fitted against the abutting boss.

7. The plugging device for a safety valve according to claim 4, wherein a side of the rotary disk facing away from the plugging member is provided with an auxiliary urging member.

8. The plugging device for a safety valve according to any one of claims 1 to 7, further comprising an elastic sealing member, wherein the elastic sealing member is provided with a third flow guide through hole correspondingly communicated with the first flow guide through hole, and the elastic sealing member is attached to the plugging side; and/or the plugging device of the safety valve further comprises a connecting joint, and the connecting joint is used for sealing and matching the guide pipe with the second flow guiding through hole.

9. A seal test system for a safety valve, comprising a conduit and the plugging device of any one of claims 1 to 8, wherein one end of the conduit is inserted into and fitted with the first flow guide through hole and the second flow guide through hole.

10. The system for testing the sealing of a safety valve according to claim 9, further comprising a flow rate detecting element and a bubble counting assembly, wherein the conduit has an air inlet end inserted into the first flow guiding through hole and the second flow guiding through hole and an air outlet end extending below the liquid level, the flow rate detecting element is used for detecting the flow rate in the conduit, and the bubble counting assembly is used for detecting and counting the number of bubbles at the air outlet end.

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