Pressure relief, installation device, slide plate assembly and system for online backup of rupture discs

Abstract

A pressure relief device, installation apparatus, slide plate assembly, and system for online backup of rupture discs are disclosed. The pressure relief device is applied to a venting position in the flow path to vent the flow. Two opposing valve bodies are located at the venting position. The pressure relief device includes a first slide plate assembly and a second slide plate assembly. The first slide plate assembly has a first rupture disc, and the second slide plate assembly has a second rupture disc. When the second slide plate assembly is located between the two valve bodies, the second rupture disc is located within the flow path, and the first slide plate assembly is located outside the two valve bodies. After the second rupture disc ruptures, the first and second slide plate assemblies are detachably connected. The second slide plate assembly can be moved outside the two valve bodies, and the first slide plate assembly can be moved between the two valve bodies, allowing the first rupture disc to switch back into the flow path. The rupture disc can be replaced quickly and easily.

Description

Technical Field

[0001] This patent relates to a pressure relief device, installation device, slide plate assembly, and system for realizing online backup of rupture discs, which has an online backup function. Background Technology

[0002] Rupture discs are components that release pressure upon bursting at a calibrated burst pressure and temperature. They are important safety devices to prevent overpressure damage to pressure equipment. They have advantages such as simple structure, sensitivity, accuracy, no leakage, and strong pressure release capacity, and are widely used in chemical, petroleum, light industry, metallurgy, nuclear power and other industrial sectors.

[0003] Rupture discs are non-reclosable emergency pressure relief devices; once they rupture, they must be replaced immediately. Figure 1 As shown, in traditional operation, pipe flanges and bolts are used to clamp the rupture disc. To replace the rupture disc, all flange bolts need to be loosened, the pipe pushed open, the rupture disc clamping device released, the installation position located and the new rupture disc replaced, and then all flange bolts tightened.

[0004] This method has low switching efficiency, long downtime, and requires a lot of manpower and resources, especially for some large-caliber rupture discs. In addition, the on-site installation requirements for rupture discs are relatively high. If the rupture discs are not replaced on-site, the accuracy of the burst pressure will be affected. In extreme cases, it may even lead to serious production accidents. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a pressure relief device and system for realizing online backup of rupture discs, thereby solving the problem of rupture disc replacement and realizing online backup of rupture discs.

[0006] The technical solution of this invention is:

[0007] In a first aspect, a pressure relief device for online backup of rupture discs is provided. The pressure relief device is applied to a discharge location on a flow path to discharge flow through the flow path. Two opposing valve bodies are provided at the discharge location. The pressure relief device includes:

[0008] A first slide plate assembly and a second slide plate assembly, the first slide plate assembly having a first rupture disc and the second slide plate assembly having a second rupture disc, wherein when the second slide plate assembly is located between the two valve bodies, the second rupture disc is located within the flow path and the first slide plate assembly is located outside the two valve bodies;

[0009] After the second rupture disc detonates, the first slide plate assembly and the second slide plate assembly are detachably connected together. The second slide plate assembly can be moved outside the two valve bodies, and the first slide plate assembly can be moved between the two valve bodies, so that the first rupture disc switches to the flow path.

[0010] In one specific implementation of the first aspect, the pressure relief device further includes a translation mechanism for moving the second slide assembly outside the two valve bodies.

[0011] In one specific implementation of the first aspect, the first skateboard assembly includes a first upper gripper and a first lower gripper, the first rupture disc is located between the first upper gripper and the first lower gripper, and the first upper gripper and the first lower gripper are detachably connected.

[0012] In one specific implementation of the first aspect, a plurality of first bolts are connected between the first upper clamp and the first lower clamp. The first bolts pass through the first upper clamp and are threadedly connected to the first lower clamp. The plurality of first bolts are evenly distributed.

[0013] In one specific implementation of the first aspect, the pressure relief device further includes a connecting device that is detachably connected between the first lower clamp and the second lower clamp.

[0014] In one specific implementation of the first aspect, the connecting device includes a connecting bolt, and both the first lower clamp and the second lower clamp are provided with threaded holes. The two ends of the connecting bolt are respectively threadedly connected to the threaded holes of the first lower clamp and the second lower clamp.

[0015] In one specific implementation of the first aspect, the pressure relief device further includes a positioning device disposed between the first skateboard assembly and the second skateboard assembly, the positioning device being used to position the first skateboard assembly and the second skateboard assembly on the same plane.

[0016] In one specific implementation of the first aspect, the positioning device includes a positioning detection key, the first lower clamp has a first groove, the second lower clamp has a second groove, one end of the positioning detection key is disposed in the first groove and the other end is engaged in the second groove.

[0017] In one specific implementation of the first aspect, the cross-section of the positioning detection key is rectangular.

[0018] In one specific implementation of the first aspect, a connecting hole is provided at one end of the positioning detection key, and the positioning device further includes a positioning pin, which passes through the connecting hole and has both ends inserted into the first lower clamp, so that the positioning detection key is rotatably connected to the first lower clamp.

[0019] In one specific implementation of the first aspect, the positioning detection key includes a middle portion and a first end portion and a second end portion located at both ends of the middle portion. The width of the middle portion is greater than the width of the first end portion and greater than the width of the second end portion. The first end portion engages with the first groove, the second end portion engages with the second groove, and the middle portion engages with the space between the first lower clamp and the second lower clamp.

[0020] In one specific implementation of the first aspect, the connecting device includes a tray, and the first lower clamp and the second lower clamp are detachably connected to the tray.

[0021] In one specific implementation of the first aspect, sealing rings are provided on both the upper and lower sides of the pallet to respectively achieve sealing between the pallet and the valve body, and sealing between the first lower clamp and the second lower clamp.

[0022] In one specific implementation of the first aspect, the pallet is provided with a mounting groove, and the first lower clamp and the second lower clamp are provided with protrusions that cooperate with the mounting groove on the side facing the pallet.

[0023] In one specific implementation of the first aspect, a limiting plate is provided on the side of the first lower clamp away from the second lower clamp, and when the limiting plate contacts the valve body, the first rupture disc switches to the correct position.

[0024] In one specific implementation of the first aspect, a first sealing ring is provided on the side of the first upper clamp away from the first rupture disc, and a lower annular groove is provided on the surface of the first lower clamp away from the first rupture disc, and a second sealing ring is provided in the lower annular groove, so as to respectively achieve the sealing between the pallet and the valve body, and the sealing between the first lower clamp and the second lower clamp.

[0025] In one specific implementation of the first aspect, the translation mechanism includes a lifting frame, a valve stem nut, a valve stem, a fork pin, and a bolt; the lifting frame is fixedly connected to one of the valve bodies; in the moving direction of the sliding assembly, the valve stem nut is confined to one side of the lifting frame, and the valve stem nut is rotatable relative to the lifting frame; the valve stem nut has an internal thread that engages with the externally threaded valve stem thread, and rotating the valve stem nut drives the valve stem to move axially; one end of the valve stem is connected to a fork pin, the first sliding plate assembly is connected to a connecting part, and the bolt passes through the connecting part and the pin to connect the fork pin and the first sliding plate assembly.

[0026] In one specific implementation of the first aspect, a clamping mechanism is further included. The clamping mechanism comprises a first main drive shaft, a second main drive shaft, a first auxiliary drive shaft, a second auxiliary drive shaft, a left pressure block, a right pressure block, an eccentric shaft connecting rod, and a crank connecting rod. The valve body is provided with a middle flange. The first main drive shaft and the second main drive shaft are respectively located on opposite sides of one valve body and on the side of the middle flange facing away from the other valve body. The left pressure block is connected to the ends of the first main drive shaft and the second main drive shaft. The first auxiliary drive shaft and the second auxiliary drive shaft are located on the other valve body. On opposite sides, and located on the side of the middle flange away from the first main drive shaft; both ends of the first main drive shaft and the first auxiliary drive shaft, as well as both ends of the second main drive shaft and the second auxiliary drive shaft, are connected by the eccentric connecting rod; one end of the first main drive shaft is connected to the drive mechanism, and the other end is connected to the second main drive shaft through the crank connecting rod, which connects the first main drive shaft and the second main drive shaft so that the first main drive shaft can drive the second main drive shaft to rotate; the first main drive shaft and the second main drive shaft are eccentric rods.

[0027] Secondly, a pressure relief device for realizing online backup of rupture discs is provided. The pressure relief device is applied to a discharge position on the flow path to discharge the flow path. The discharge position is provided with two opposing valve bodies. The pressure relief device includes: a first slide plate assembly, the first slide plate assembly having a first rupture disc;

[0028] The translation mechanism is used to move the first slide plate assembly between the two valve bodies after the second rupture disc on the second slide plate assembly between the two valve bodies 101 ruptures, and to move the second slide plate assembly outside the two valve bodies so that the first rupture disc switches to the flow path.

[0029] Thirdly, a first sliding plate assembly for online backup of rupture discs is provided, applied between two valve bodies disposed opposite each other on the flow path. When the sliding plate assembly is located between the two valve bodies, the rupture disc built into the sliding plate assembly is located within the flow path to drain water from the flow path.

[0030] The third slide assembly has a built-in first rupture disc and an external first mating part;

[0031] When the fourth rupture disc on the fourth slide assembly between the two valve bodies 101 explodes, the fourth mating part of the fourth slide assembly is detachably connected to the first mating part. The fourth slide assembly can then be moved outside the two valve bodies, and the third slide assembly can be moved between the two valve bodies, so that the first rupture disc switches to the flow path.

[0032] One of the first mating part and the fourth mating part is a convex part, and the other is a concave part.

[0033] In one specific implementation of the third aspect, the protrusion is a connecting bolt, and the recess is a threaded hole.

[0034] Fourthly, an installation device for realizing online backup of rupture discs is provided. The installation device is used to install a sliding plate assembly between two valve bodies arranged opposite each other. The two valve bodies are disposed on the flow path. When the sliding plate assembly is located between the two valve bodies, the rupture disc built into the sliding plate assembly is located within the flow path to drain the flow path. The device includes: a support plate for arranging a plurality of sliding plate assemblies in an arranged manner. The plurality of sliding plate assemblies include a first sliding plate assembly and a second sliding plate assembly.

[0035] Translation mechanism for driving the pallet to move;

[0036] When the second slide plate assembly is located between the two valve bodies 101, and the rupture disc built into the second slide plate assembly detonates, the second slide plate assembly moves outside the two valve bodies under the drive of the translation mechanism, and the first slide plate assembly moves between the two valve bodies under the drive of the translation mechanism, so that the rupture disc built into the first slide plate assembly switches to the flow path.

[0037] Fifthly, a pressure system for realizing online backup of rupture discs is provided, including a flow path, wherein the flow path is provided with any of the pressure relief devices described above.

[0038] Sixthly, a pressure system for realizing online backup of rupture discs is provided, including a flow path, wherein the first sliding plate assembly described above is disposed on the flow path.

[0039] It has two sets of rupture discs, one for normal use and one for backup. Once one set of rupture discs detonates, only one operator needs to drive the clamping mechanism to complete the clamping and releasing process of the rupture disc. The backup rupture disc can be easily switched to working status without any tools.

[0040] In summary, this application includes at least the following beneficial technical effects:

[0041] The device described in this patent can completely replace the original rupture disc and has the advantages of accurate burst pressure, fast and labor-saving operation, high sealing performance, and safety and reliability. It not only solves a series of problems related to the replacement and backup of rupture discs in process pipelines, but also greatly reduces the downtime of the factory and can quickly enter the operating state, resulting in significant economic benefits.

[0042] Under the premise of meeting the normal blasting and venting requirements, it can achieve the purpose of online backup, saving the tedious process of disassembling and assembling bolts, which is time-consuming and labor-intensive, as well as the time for replacing rupture discs. This greatly reduces the time for factories to replace rupture discs due to production stoppages, reduces the safety risks caused by on-site replacement of rupture discs, and improves production efficiency and benefits. Attached Figure Description

[0043] Figure 1 This is a pipeline installation diagram for a standard rupture disc.

[0044] Figure 2 Piping installation diagram for a pressure relief device to achieve online backup of rupture discs;

[0045] Figure 3 This is a front view of the overall structure of the device;

[0046] Figure 4 This is a side view of the entire device;

[0047] Figure 5 This is a cross-sectional view of the entire device;

[0048] Figure 6 This is an overall diagram of the skateboard components;

[0049] Figure 7 A cross-sectional view of the skateboard assembly;

[0050] Figure 8 A diagram showing the different states of the positioning detection key;

[0051] Figure 9 This is a drawing of the outline of the key component for positioning and detection.

[0052] Figure 10 This is a schematic diagram showing the connection of the connecting device via a tray;

[0053] Figure 11 This is a cross-sectional view of the connecting device connected via a tray;

[0054] Figure 12 This is another structural cross-sectional view of the connecting device connected via a tray.

[0055] Explanation of reference numerals in the attached drawings: 1. Clamping mechanism; 2. First slide assembly; 3. Second slide assembly; 4. Connecting device; 5. Translation mechanism;

[0056] 101. Valve body; 102. Pipe flange; 103. Middle flange;

[0057] 104. First main drive shaft; 105. Second main drive shaft; 106. First auxiliary drive shaft; 107. Second auxiliary drive shaft; 108. Eccentric shaft connecting rod; 109. Crank; 110. Crank connecting rod; 111. Left pressure block; 112. Right pressure block;

[0058] 201. First upper clamp; 202. First rupture disc; 203. First lower clamp; 204. Connecting bolt; 205. First bolt; 206. Limiting plate; 207. Locking nut; 208. Upper sealing ring; 209. Lower sealing ring; 210. Positioning detection key; 211. Positioning pin; 212. First groove; 213. Middle section; 214. Thin segment; 215. Connecting hole;

[0059] 301. Second upper clamp; 302. Second rupture disc; 303. Second lower clamp; 304. Threaded hole; 305. Second groove; 306. Countersunk hole;

[0060] 501. Lifting frame; 502. Valve stem nut; 503. Valve stem; 504. Lifting handwheel; 505. Rolling bearing; 506. Bearing cap; 507. Fork pin;

[0061] 6. Tray; 61. Mounting slot;

[0062] 7. Protrusion. Detailed Implementation

[0063] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0064] Example 1

[0065] This application discloses a pressure relief device for online backup of rupture discs, such as... Figure 2 , Figure 3 and Figure 4 As shown, it includes a flow path, a clamping mechanism 1, a translation mechanism 5, a first slide assembly 2, a second slide assembly 3, and a connecting device 4.

[0066] The first slide plate assembly 2 carries a first rupture disc 202, and the second slide plate assembly 3 carries a second rupture disc 302; the flow path is used for unloading, and the flow path is formed by at least two valve bodies 101, with the first rupture disc 202 or the second rupture disc 302 located between the two valve bodies 101 so that the first rupture disc 202 or the second rupture disc 302 is located within the flow path; the connecting device 4 is detachably connected between the first slide plate assembly 2 and the second slide plate assembly 3; the clamping mechanism 1 is connected between the two valve bodies 101 and is used to drive the two valve bodies 101 to move closer or further apart from each other; the translation mechanism 5 is connected between the valve body 101 and the first slide plate assembly 2 and is used to drive the first slide plate assembly 2 and the second slide plate assembly 3 to move along the direction perpendicular to the flow direction of the fluid within the flow path.

[0067] After the first rupture disc 202 located in the flow path detonates, the clamping mechanism 1 drives the two valve bodies 101 to move away from each other, and the translation mechanism 5 drives the first sliding plate assembly 2 and the second sliding plate assembly 3 to move until the second rupture disc 302 is located in the flow path. Then, the clamping mechanism 1 drives the two valve bodies 101 to move closer to each other until the two valve bodies 101 are clamped together, and the two valve bodies 101 form a seal between the two sliding plate assembly 3.

[0068] Subsequently, if the environment along the flow path facilitates equipment replacement, the first slide plate assembly 2 can be disassembled and a new first rupture disc 202 can be installed. If the environment along the flow path does not facilitate equipment replacement, the translation mechanism 5 and the first slide plate assembly 2 can be separated, and the first slide plate assembly 2 can be separated from the second slide plate assembly 3 via the connecting device 4. Then, the first slide plate assembly 2 can be disassembled, a new first rupture disc 202 can be installed, and finally, the first slide plate assembly 2 can be reconnected to the second slide plate assembly 3 and the translation mechanism 5 via the connecting device 4. This allows for convenient replacement of the rupture disc and ensures that the device continuously has two rupture discs: a main one and a backup one.

[0069] like Figure 5 As shown, the flow path is formed by at least two valve bodies 101. The two valve bodies 101 have basically the same shape. One end of the valve body 101 is a pipe flange 102, and the other end is a middle flange 103 with a sealing surface. The pipe flange 102 is used to connect the flange of the system pipeline. The first slide plate assembly 2 and the second slide plate assembly 3 are located between the two middle flanges 103. When the clamping mechanism 1 clamps the two valve bodies 101, the middle flange 103 of the valve body 101 forms a sealing pair with the first slide plate assembly 2 or the second slide plate assembly 3.

[0070] like Figure 2As shown, the clamping mechanism 1 is an eccentric linkage actuator, specifically including a pressure block assembly, a first main drive shaft 104, a second main drive shaft 105, a first auxiliary drive shaft 106, a second auxiliary drive shaft 107, an eccentric shaft connecting rod 108, a crank 109, and a crank connecting rod 110. The pressure block assembly includes two longitudinal left pressure blocks 111 and two longitudinal right pressure blocks 112. The left pressure blocks 111 are located between the pipe flange 102 and the middle flange 103 of the left valve body 101, and the right pressure blocks 112 are located between the pipe flange 102 and the middle flange 103 of the right valve body 101. The left pressure blocks 111 and the right pressure blocks 112 press against and connect the middle flanges 103 of the left and right valve bodies 101 from both sides of the valve body 101, respectively. The two left pressure blocks 111 are connected by the vertically distributed first main drive shaft 106. 4. The first main drive shaft 104 and the second main drive shaft 105 are connected together. The two right pressure blocks 112 are connected together by the first auxiliary drive shaft 106 and the second auxiliary drive shaft 107, which are distributed vertically. The first main drive shaft 104 and the second main drive shaft 105 are eccentric rods, while the first auxiliary drive shaft 106 and the second auxiliary drive shaft 107 are concentric rods. The two ends of the first main drive shaft 104 and the first auxiliary drive shaft 106, and the two ends of the second main drive shaft 105 and the second auxiliary drive shaft 107 are respectively connected together by two parallel eccentric connecting rods. One end of the first main drive shaft 104 is connected to the drive mechanism, and the other end is connected to the second main drive shaft 105 through a crank connecting rod 110. The two ends of the crank connecting rod 110 are fixed to the crank 109 by pins with pins. The crank 109 is sleeved on the main drive shaft outside the eccentric connecting rod. The two ends of the two main drive shafts and the two auxiliary drive shafts are limited by cotter pins.

[0071] When an external force causes one end of the first main drive shaft 104 to rotate clockwise, the first main drive shaft 104 drives the second main drive shaft 105 to rotate together via a crank, a crank connecting rod 110 connected together, and a crank connected to the other end of the crank connecting rod 110. The eccentric rotation of the first main drive shaft 104 and the second main drive shaft 105 generates an eccentricity, causing the four symmetrical eccentric connecting rods to pull the right valve body 101 to the left, thereby continuously reducing the distance between the left and right valve bodies 101. As a result, the left and right valve bodies 101 clamp the first slide plate assembly 2 or the second slide plate assembly 3, achieving a sealing effect.

[0072] like Figure 2 and Figure 5As shown, the translation mechanism 5 includes a lifting frame 501, a valve stem nut 502, a valve stem 503, a lifting handwheel 504, rolling bearings 505, bearing caps 506, and a fork pin 507. The lifting frame 501 is installed on the middle flange 103 of the valve body 101. The valve stem nut 502 has a shoulder, and rolling bearings 505 are provided on both sides of the shoulder. The bearing caps 506 press the rolling bearings 505 to press the valve stem nut 502 onto the lifting frame 501, ensuring that the valve stem nut 502 can only rotate without axial movement. The upper section of the valve stem nut 502 is connected to the lifting handwheel 504, which is used to drive the valve stem nut 502 to rotate. The valve stem nut 502 has internal threads machined inside, which... The valve stem with trapezoidal external thread is threaded and rotated by the valve stem nut 502 to move the valve stem 503 up and down. The lower end of the valve stem 503 is connected to a fork pin 507. One end of the fork pin 507 has a groove. The first lower clamp 203 is provided with a connecting part, which is inserted into the groove. The fork pin 507 and the first lower clamp 203 are connected together by bolts and nuts. The bolt passes through the fork pin 507 and the connecting part, and the lower thread is connected to one end of the bolt. The fork pin 507 is connected to an indicator rod. The indicator rod and the lifting frame 501 are slidably connected along the axis of the valve stem 503. Therefore, the valve stem 503 drives the sliding plate lifting plate and the sliding plate to move up or down together.

[0073] Both the first slide plate assembly 2 and the second slide plate assembly 3 are perpendicular to the flow direction of the fluid within the flow path, and are located in the same plane. The first slide plate assembly 2 is bolted to the translation mechanism 5. By turning the handwheel, the translation mechanism 5 moves the first slide plate assembly 2 and the second slide plate assembly 3 along the direction perpendicular to the flow channel.

[0074] like Figure 6 As shown, the first slide assembly 2 includes a first upper clamp 201 and a first lower clamp 203, with a first rupture disc 202 located between the first upper clamp 201 and the first lower clamp 203, and the first upper clamp 201 and the first lower clamp 203 are detachably connected; the second slide assembly 3 includes a second upper clamp 301 and a second lower clamp 303, with a second rupture disc 302 located between the second upper clamp 301 and the second lower clamp 303, and the second upper clamp 301 and the second lower clamp 303 are detachably connected.

[0075] Specifically, multiple first bolts 205 are connected between the first upper clamp 201 and the first lower clamp 203, and between the second upper clamp 301 and the second lower clamp 303. The first bolts 205 pass through the upper clamps and are threadedly connected to the lower clamps. The first bolts 205 are evenly distributed along the edges of the first upper clamp 201 and the second upper clamp 301. The first upper clamp 201, the first rupture disc 202, and the first lower clamp 203 are pre-compressed by the first bolts 205, and the second upper clamp 301, the second rupture disc 302, and the second lower clamp 303 are also pre-compressed by the first bolts 205. The first lower clamp 203 and the second lower clamp 303 are almost identical.

[0076] The connecting device 4 is connected between the first lower clamp 203 and the second lower clamp 303.

[0077] Specifically, the connecting device 4 may include a connecting bolt 204. Threaded holes 304 are provided in the center of the opposing surfaces of the first lower clamp 203 and the second lower clamp 303. Both ends of the connecting bolt 204 are threaded into the threaded holes 304 of the first lower clamp 203 and the second lower clamp 303, respectively. Two locking nuts 207 are externally threaded onto the connecting bolt 204. After the first lower clamp 203 and the second lower clamp 303 are connected by the connecting bolt 204, the two locking nuts 207 are rotated to tighten against the first lower clamp 203 and the second lower clamp 303, thereby improving the stability of the connection between the connecting bolt 204 and the first slide plate assembly 2 and the second slide plate assembly 3.

[0078] A positioning device is also provided between the first skateboard assembly 2 and the second skateboard assembly 3 to ensure that the first skateboard assembly 2 and the second skateboard assembly 3 are located on the same plane.

[0079] like Figure 8 and Figure 9 As shown, the positioning device includes a first groove 212, a second groove 305, and a positioning detection key 210. The first lower clamp 203 has the first groove 212 on the side facing the first rupture disc 202, and the second lower clamp 303 has the second groove 305 on the side facing the second rupture disc 302. One end of the positioning detection key 210 is engaged in the first groove 212, and the other end is engaged in the second groove 305. The first groove 212 is located at the edge of the opposing surfaces of the first lower clamp 203 and the second lower clamp 303, resulting in a large distance between the positioning detection key 210 and the connecting bolt 204. This ensures the accuracy of positioning by the positioning detection key 210 and facilitates its operation.

[0080] The first lower clamp 203 is provided with a hole for mounting a positioning pin 211. One end of the positioning detection key 210 is provided with a connecting hole 215. The positioning pin 211 passes through the connecting hole 215 and both ends of the positioning pin 211 are inserted into the first lower clamp 203 to rotatably connect the positioning detection key 210 to the first lower clamp 203. The positioning detection key 210 includes a middle part 213 and thin segments 214 located at both ends of the middle part 213. The width of the middle part 213 is greater than the width of the thin segments 214. The width of the middle part 213 is equal to the installation distance between the first lower clamp 203 and the second lower clamp 303. The width of the thin segments 214 matches the width of the first groove 212 and the second groove 305. If the installation distance between the first lower clamp 203 and the second lower clamp 303 is appropriate and they are on the same plane, the positioning detection key 210 can smoothly rotate into the second groove 305 of the opposite second lower clamp 303. This avoids the situation where the first lower clamp 203 and the second lower clamp 303 are not properly positioned when connected by the connecting bolt 204. The cross-section of the positioning detection key 210 is rectangular. The rectangular cross-section ensures the flatness of the lower clamp installation and ensures that the first lower clamp 203 and the second lower clamp 303 can be installed on the same horizontal plane with an appropriate distance.

[0081] The connection between the first lower clamp 203 and the second lower clamp 303 in this invention can be of various types other than the connection with the connecting bolt 204.

[0082] For example, specifically, such as Figure 10 As shown, the connecting device 4 may also include a tray 6, a first lower clamp 203, and a second lower clamp 303, which can be connected to the tray 6 of suitable size by bolts to form an integral structure. The tray 6 has sealing grooves designed on both the top and bottom, and a sealing gasket can be added to achieve a seal. The distance between the first lower clamp 203 and the second lower clamp 303 is fixed by bolts on the tray 6. This solution is simple and convenient, with strong parts versatility, requiring only an additional seal between the first lower clamp, the second lower clamp, and the tray 6.

[0083] like Figure 11 The cross-sectional shape of the first lower clamp 203 and the second lower feeder 303 can also be Figure 10 The ring is made Figure 11 The T-shaped design means that the pallet 6 has an installation groove 61. The first lower clamp 203 and the second lower clamp 303 have protrusions 7 that cooperate with the installation groove on the side facing the pallet 6. This is equivalent to adding a guide section between the pallet 6 and the first lower clamp 203, which is beneficial for positioning and assembly, and reduces the number of seals between the lower clamps and the pallet 6.

[0084] When the connecting device 4 uses the connecting bolt 204, compared with the snap-fit ​​connection method, the connection of the connecting bolt 204 has almost no loosening. When the translation mechanism 5 drives the first sliding plate assembly 2 and the second sliding plate assembly 3 to move together to switch the rupture disc, the position of the rupture disc movement is more accurate.

[0085] like Figure 7 As shown, both the first lower clamp 203 and the second lower clamp 303 are bolted to the limiting plate 206. The end of the first lower clamp 203 facing away from the second lower clamp 303 is connected to the limiting plate 206, and the end of the second lower clamp 303 facing away from the second lower clamp 303 is also connected to the limiting plate 206. When the clamping mechanism 1 is released and the rupture disc is switched, the first sliding plate assembly 2 and the second sliding plate assembly 3 move until the limiting plate 206 is in contact with the side of the valve body 101. This indicates that the rupture disc has been switched to the correct position, ensuring smooth internal flow during rupture disc rupture and not affecting emergency pressure relief.

[0086] like Figure 7 As shown, the first upper clamp 201 and the second upper clamp 301, which are opposite to the surface of the first rupture disc 202, have upper annular grooves, and a first sealing ring is disposed in the upper annular grooves. The first lower clamp 203 and the second lower clamp 303, which are opposite to the surface of the first rupture disc 202, have lower annular grooves, and a second sealing ring is disposed in the lower annular grooves. When the clamping mechanism 1 moves the two valve bodies 101 close together, the first slide plate assembly 2 or the second slide plate assembly 3 forms a seal with the surface of the middle flange 103 of the valve body 101 through the first and second sealing rings, thus achieving an internal mechanism without any hidden sealing rings. Once the sealing rings are damaged, the first slide plate assembly 2 and the second slide plate assembly 3 can be pulled out, which is very convenient for online replacement.

[0087] The first and second sealing rings can also be spiral wound gaskets, sealing blocks, non-metallic gaskets, metallic gaskets, or combinations of double seals and other sealing components.

[0088] The first rupture disc 202 and the second rupture disc 302 can be of various types, such as positive arch shape and negative arch shape.

[0089] The first rupture disc 202 and the second rupture disc 302 are clearly marked to ensure the correct installation direction.

[0090] During normal operation, clamping mechanism 1 clamps the first slide plate assembly 2 or the second slide plate assembly 3 to form a seal, and the two rupture discs are in a one-in-use and one-in-standby state.

[0091] The implementation principle of this application is as follows: When the first rupture disc 202 in use detonates, the drive handwheel of the clamping mechanism 1 is rotated to drive the two valve bodies 101 to move away from each other, the first slide plate assembly 2 is released, and the lifting handwheel of the translation mechanism 5 is rotated to make the first slide plate assembly 2 and the second slide plate assembly 3 move smoothly in a direction perpendicular to the flow path. Through the movement of the first slide plate assembly 2 and the second slide plate assembly 3, the detonated first rupture disc 202 is pushed out, and at the same time the spare second rupture disc 302 moves until the limiting piece at the end of the spare rupture disc is stuck on the side of the valve body 101. At this time, it indicates that the spare second rupture disc 302 has moved to the correct position.

[0092] The drive handwheel of the clamping mechanism 1 is reversed, and the clamping mechanism 1 clamps the second slide assembly 3 to form a seal, so as to achieve the purpose of online use of the spare rupture disc.

[0093] After completing the above steps, in situations where the first rupture disc 202 can be replaced on-site, the first bolt 205 between the first upper clamp 201 and the first lower clamp 203 can be loosened, and the first upper clamp 201 and the first rupture disc 202 can be removed in sequence. A new first rupture disc 202 can be installed, and then the first upper clamp 201, the new first rupture disc 202, and the first lower clamp 203 can be tightened together using the first bolt 205, thus achieving a one-for-one standby state for the rupture discs and realizing the purpose of online standby. In situations where replacing the rupture disc is not possible on-site, the connecting bolt 204 and the locking nut 207 at one end can be loosened, the positioning detection key 210 can be lifted to 90°, and the first lower clamp 203 can be separated from the translation mechanism 5. See the appendix for details. Figure 8 Then, the first skateboard assembly 2 is removed as a whole, the second rupture disc 302 is replaced, and then it is reinstalled. The installation position can be determined by the positioning detection key 210.

[0094] In this invention, the two rupture discs can be set to different burst pressures according to the on-site process requirements, or one of the rupture discs can be positioned as a blind flange to blindly seal the pipeline after the bursting of one of the rupture discs.

[0095] The operation process in this invention is achieved by manually operating the drive handwheel and the lifting handwheel, but other driving methods can also be used, such as pneumatic, hydraulic, electric, etc., to achieve automatic control.

[0096] Example 2

[0097] A first slide plate assembly 2 for online backup of rupture discs is applied between two valve bodies 101 disposed opposite each other and arranged in a flow path. When the slide plate assembly 2 is located between the two valve bodies 101, the rupture disc built into the slide plate assembly 2 is located in the flow path to drain the flow path.

[0098] exist Figure 6 In this configuration, the third slide plate assembly 2 is equivalent to the first slide plate assembly 2, and the fourth slide plate assembly 3 is equivalent to the second slide plate assembly 3. The third slide plate assembly 2 has a built-in first rupture disc 202 and an external first mating part. When the fourth rupture disc 302 on the fourth slide plate assembly 3 between the two valve bodies 101 ruptures, the fourth mating part of the fourth slide plate assembly 3 is detachably connected to the first mating part. The purpose of this detachable connection is that the third slide plate assembly 2 and the fourth slide plate assembly 3 can move together. This means that the movement of the third slide plate assembly 2 can move the fourth slide plate assembly 3, or the movement of the fourth slide plate assembly 3 can move the third slide plate assembly 2. The fourth slide plate assembly 3 can move outside the two valve bodies 101, and the third slide plate assembly 2 can move between the two valve bodies 101, so that the first rupture disc 202 switches to the flow path. One of the first mating part and the fourth mating part is a protrusion, and the other is a recess. The protrusion is a connecting bolt 204, and the recess is a threaded hole 304.

[0099] Example 3

[0100] An installation device for online backup of rupture discs is provided. The installation device is used to install a sliding plate assembly between two valve bodies 101 arranged opposite each other. The two valve bodies 101 are arranged on a flow path. When the sliding plate assembly 2 is located between the two valve bodies 101, the rupture disc built into the sliding plate assembly 2 is located in the flow path to drain the flow path.

[0101] like Figure 4 and Figure 10 As shown, the installation device includes: a tray 6 and a translation mechanism 5. The tray 6 is used to arrange multiple slide plate assemblies, including a first slide plate assembly 2 and a second slide plate assembly 3. The translation mechanism 5 is used to drive the tray 6 to move. Specifically, when the second slide plate assembly 3 is located between the two valve bodies 101, and the rupture disc 302 built into the second slide plate assembly 3 detonates, the second slide plate assembly 3 moves outside the two valve bodies 101 under the drive of the translation mechanism, and the first slide plate assembly 2 moves between the two valve bodies 101 under the drive of the translation mechanism, so that the rupture disc 202 built into the first slide plate assembly 2 switches to the flow path.

[0102] Example 4

[0103] A pressure system for online backup of rupture discs includes a flow path, on which the aforementioned pressure relief device is provided.

[0104] Example 5

[0105] A pressure system for realizing online backup of rupture discs includes a flow path, on which the aforementioned first slide plate assembly 2 is disposed.

[0106] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. A pressure relief device for online backup of rupture discs, the pressure relief device being applied to a discharge location on a flow path to discharge flow through the flow path, wherein the discharge location is provided with two opposing valve bodies (101), characterized in that, The pressure relief device includes: A first slide plate assembly (2) and a second slide plate assembly (3), wherein the first slide plate assembly (2) has a first rupture disc (202) and the second slide plate assembly (3) has a second rupture disc (302). When the second slide plate assembly (3) is located between the two valve bodies (101), the second rupture disc (302) is located within the flow path and the first slide plate assembly (2) is located outside the two valve bodies (101). The first slide plate assembly (2) and the second slide plate assembly (3) are detachably connected together. After the second rupture disc (302) explodes, the second slide plate assembly (3) can be moved outside the two valve bodies (101), and the first slide plate assembly (2) can be moved between the two valve bodies (101) so that the first rupture disc (202) switches to the flow path. The first skateboard assembly (2) includes a first upper clamp (201) and a first lower clamp (203), the first rupture disc (202) is located between the first upper clamp (201) and the first lower clamp (203), and the first upper clamp (201) and the first lower clamp (203) are detachably connected. The second skateboard assembly (3) includes a second lower clamp (303); The pressure relief device further includes a connecting device (4), which is detachably connected between the first lower clamp (203) and the second lower clamp (303); The connecting device (4) includes a connecting bolt (204). Both the first lower clamp (203) and the second lower clamp (303) are provided with threaded holes (304). The two ends of the connecting bolt (204) are threadedly connected to the threaded holes (304) of the first lower clamp (203) and the threaded holes (304) of the second lower clamp (303), respectively. The pressure relief device further includes a positioning device disposed between the first skateboard assembly (2) and the second skateboard assembly (3), the positioning device being used to position the first skateboard assembly (2) and the second skateboard assembly (3) on the same plane; The positioning device includes a positioning detection key (210), the first lower clamp (203) has a first groove (212), the second lower clamp (303) has a second groove (305), one end of the positioning detection key (210) is disposed in the first groove (212), and the other end is engaged in the second groove (305); The cross-section of the positioning detection key (210) is rectangular; One end of the positioning detection key (210) is provided with a connecting hole (215). The positioning device also includes a positioning pin (211). The positioning pin (211) passes through the connecting hole (215) and both ends of the positioning pin (211) are inserted into the first lower clamp (203) so that the positioning detection key (210) is rotatably connected to the first lower clamp (203). Either the first rupture disc (202) or the second rupture disc (302) can be replaced by a blind plate.

2. The pressure relief device for online backup of rupture discs according to claim 1, characterized in that, The pressure relief device also includes a translation mechanism (5) for moving the second slide assembly (3) outside the two valve bodies (101).

3. The pressure relief device for online backup of rupture discs according to claim 1, characterized in that, A plurality of first bolts (205) are connected between the first upper clamp (201) and the first lower clamp (203). The first bolts (205) pass through the first upper clamp (201) and are threadedly connected to the first lower clamp (203). The plurality of first bolts (205) are evenly distributed.

4. A pressure relief device for online backup of rupture discs according to any one of claims 1-3, characterized in that, The positioning detection key (210) includes a middle part (213), and a first end (214) and a second end located at both ends of the middle part (213). The width of the middle part (213) is greater than the width of the first end (214) and greater than the width of the second end. The first end (214) cooperates with the first groove (212), and the second end cooperates with the second groove (305). The middle part (213) cooperates with the space between the first lower clamp (203) and the second lower clamp (303).

5. A pressure relief device for online backup of rupture discs according to claim 4, characterized in that, The second skateboard assembly (3) also includes a second upper clamp (301); The second rupture disc (302) is located between the second upper clamp (301) and the second lower clamp (303), and the second upper clamp (301) and the second lower clamp (303) are detachably connected.

6. A pressure relief device for online backup of rupture discs according to claim 1, characterized in that, A limiting plate (206) is provided on the side of the first lower clamp (203) away from the second lower clamp (303). When the limiting plate (206) contacts the valve body (101), the first rupture disc (202) switches to the correct position.

7. A pressure relief device for online backup of rupture discs according to claim 6, characterized in that, It also includes a translation mechanism (5); The translation mechanism (5) includes a lifting frame (501), a valve stem nut (502), a valve stem (503), a fork pin (507), and a bolt. The lifting frame (501) is fixedly connected to a valve body (101). In the moving direction of the sliding assembly, the valve stem nut (502) is limited to one side of the lifting frame (501), and the valve stem nut (502) can rotate relative to the lifting frame (501). The valve stem nut (502) has an internal thread, which is threaded with the valve stem (503) with an external thread. By rotating the valve stem nut (502), the valve stem (503) is driven to move axially. One end of the valve stem (503) is connected to a fork pin (507). The first slide plate assembly (2) is connected to a connecting part. The bolt passes through the connecting part and the fork pin (507) to connect the fork pin (507) and the first slide plate assembly (2).

8. A pressure relief device for online backup of rupture discs according to claim 7, characterized in that, It also includes a clamping mechanism (1), which includes a first main drive shaft (104), a second main drive shaft (105), a first auxiliary drive shaft (106), a second auxiliary drive shaft (107), a left pressure block (111), a right pressure block (112), an eccentric shaft connecting rod (108), and a crank connecting rod (110). The valve body (101) is provided with a middle flange (103). The first main drive shaft (104) and the second main drive shaft (105) are respectively located on opposite sides of one valve body (101) and on the side of the middle flange (103) away from the other valve body (101). The left pressure block (111) is connected to the ends of the first main drive shaft (104) and the second main drive shaft (105). The first auxiliary drive shaft (106) and the second auxiliary drive shaft (107) are located on the other valve body (101). The valve body (101) is located on opposite sides of the middle flange (103) away from the first main drive shaft (104); the two ends of the first main drive shaft (104) and the first auxiliary drive shaft (106), as well as the two ends of the second main drive shaft (105) and the second auxiliary drive shaft (107), are connected by an eccentric connecting rod; one end of the first main drive shaft (104) is connected to the drive mechanism, and the other end is connected to the second main drive shaft (105) through the crank connecting rod (110), the crank connecting rod (110) is connected between the first main drive shaft (104) and the second main drive shaft (105) so that the first main drive shaft (104) can drive the second main drive shaft (105) to rotate; the first main drive shaft (104) and the second main drive shaft (105) are eccentric rods.

9. A pressure relief device for online backup of rupture discs, the pressure relief device being applied to a discharge location on a flow path to discharge flow through the flow path, wherein the discharge location is provided with two opposing valve bodies (101), characterized in that, The pressure relief device includes: Connecting device (4), first skateboard assembly (2), and second skateboard assembly (3); The first slide plate assembly (2) has a first rupture disc (202), and the second slide plate assembly (3) has a second rupture disc (302). When the second slide plate assembly (3) is located between the two valve bodies (101), the second rupture disc (302) is located within the flow path, and the first slide plate assembly (2) is located outside the two valve bodies (101). The first slide plate assembly (2) and the second slide plate assembly (3) are detachably connected together. After the second rupture disc (302) explodes, the second slide plate assembly (3) can be moved outside the two valve bodies (101), and the first slide plate assembly (2) can be moved between the two valve bodies (101) so that the first rupture disc (202) switches to the flow path. The first skateboard assembly (2) includes a first upper clamp (201) and a first lower clamp (203), the first rupture disc (202) is located between the first upper clamp (201) and the first lower clamp (203), and the first upper clamp (201) and the first lower clamp (203) are detachably connected. The second skateboard assembly (3) includes a second lower clamp (303); The pressure relief device further includes a positioning device disposed between the first skateboard assembly (2) and the second skateboard assembly (3), the positioning device being used to position the first skateboard assembly (2) and the second skateboard assembly (3) on the same plane; The positioning device includes a positioning detection key (210), the first lower clamp (203) has a first groove (212), the second lower clamp (303) has a second groove (305), one end of the positioning detection key (210) is disposed in the first groove (212), and the other end is engaged in the second groove (305); The cross-section of the positioning detection key (210) is rectangular; One end of the positioning detection key (210) is provided with a connecting hole (215). The positioning device also includes a positioning pin (211). The positioning pin (211) passes through the connecting hole (215) and both ends of the positioning pin (211) are inserted into the first lower clamp (203) so that the positioning detection key (210) is rotatably connected to the first lower clamp (203). Either the first rupture disc (202) or the second rupture disc (302) can be replaced by a blind plate; The first skateboard assembly (2) has a first mating part on its exterior; The connecting device (4) is a first mating part externally placed on the first skateboard assembly (2) and a fourth mating part externally placed on the second skateboard assembly (3); The fourth mating part is detachably connected to the first mating part; the first mating part and the fourth mating part are respectively a convex part and a concave part.

10. A pressure relief device for online backup of rupture discs according to claim 9, characterized in that, The protrusion is a connecting bolt (204), and the recess is a threaded hole (304).

11. A pressure system for realizing online backup of rupture discs, characterized in that, The device includes a flow path, on which a pressure relief device for online backup of rupture discs as described in claim 1 is provided.

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