PRESSURE RELIEF DEVICE AND MOUNTING DEVICE TO PROVIDE OPERATIVE BACKUP OF THE RUPTURE DISC, SLIDING PLATE ASSEMBLY AND PRESSURE SYSTEM

Claims

1. A pressure relief device for implementing hot replacement of a rupture disc, installed in a flow relief position in a flow channel, which allows the pressure relief device to relieve the flow in the flow channel, and two valve bodies (101) located opposite each other in the flow relief position, wherein the pressure relief device comprises a first sliding plate assembly (2) and a second sliding plate assembly (3), wherein the first sliding plate assembly (2) comprises a first rupture disc (202), and the second sliding plate assembly (3) comprises a second rupture disc (302); and if the second sliding plate assembly (3) is located between the two valve bodies (101), the second rupture disc (302) is located within the flow channel, and the first sliding plate assembly (2) is located outside the two valve bodies (101), wherein the first sliding plate assembly (2) and the second sliding plate assembly (3) are detachably connected to each other, and after the second rupture membrane (302) ruptures, the second sliding plate assembly (3) is configured to move outward from the two valve bodies (101), and the first sliding plate assembly (2) is configured to move into the space between the two valve bodies (101) so that the first rupture membrane (202) is inserted into the flow channel.

2. The pressure relief device according to claim 1, further comprising a transfer mechanism (5) configured to move the second sliding plate assembly (3) outward from the two valve bodies (101).

3. A pressure relief device according to claim 1 or 2, wherein the first sliding plate assembly (2) comprises a first upper holder (201) and a first lower holder (203), the first rupture disc (202) is located between the first upper holder (201) and the first lower holder (203), and the first upper holder (201) is releasably connected to the first lower holder (203); wherein several first bolts (205) connect the first upper holder (201) with the first lower holder (203), each of several first bolts (205) passes through the first upper holder (201) and is connected by a thread with the first lower holder (203), and several first bolts (205) are evenly spaced.

4. A pressure relief device according to any one of paragraphs 1-3, further comprising a connecting device (4) releasably connected between the first lower holder (203) and the second lower holder (303); wherein the connecting device (4) comprises a connecting bolt (204), wherein a threaded hole (304) is provided in the first lower holder (203) and the second lower holder (303), respectively, wherein the two ends of the connecting bolt (204) are connected by thread to the threaded hole (304) of the first lower holder (203) and the threaded hole (304) of the second lower holder (303), respectively.

5. The pressure relief device according to claim 4, further comprising a positioning device located between the first sliding plate assembly (2) and the second sliding plate assembly (3), and the positioning device is configured to position the first sliding plate assembly (2) and the second sliding plate assembly (3) in the same plane.

6. The pressure relief device according to claim 5, wherein the positioning device comprises a positioning recognition key (210), the first lower holder (203) comprises a first groove (212), the second lower holder (303) comprises a second groove (305), and one end of the positioning recognition key (210) is placed in the first groove (212), and the other end of the positioning recognition key (210) is inserted into the second groove (305); wherein the positioning recognition key (210) has a rectangular cross-section; wherein at the end of the positioning recognition key (210) a connecting hole (215) is provided, the positioning device further comprises a positioning pin (211), wherein the positioning pin (211) passes through the connecting hole (215), and two ends of the positioning pin (211) are inserted into the first lower holder (203) so that the positioning recognition key (210) is connected to the first lower holder (203) with the possibility of rotation.

7. The pressure relief device according to claim 6, wherein the positioning recognition key (210) comprises a middle portion (213), a first end portion (214) and a second end portion; the first end portion (214) and the second end portion are located at two ends of the middle portion (213), respectively; the width of the middle portion (213) exceeds the width of the first end portion (214) and the width of the second end portion, the first end portion (214) comprises a first groove (212), the second end portion comprises a second groove (305), and the middle portion (213) comprises a gap between the first lower holder (203) and the second lower holder (303).

8. The pressure relief device according to claim 4, wherein the connecting device (4) comprises a support plate (6), and the first lower holder (203) and the second lower holder (303) are releasably connected to the support plate (6); wherein both the upper side of the support plate (6) and the lower side of the support plate (6) contain a sealing ring for realizing a seal between the support plate (6) and the valve body (101), a seal between the first lower holder (203) and the support plate (6), and a seal between the second lower holder (303) and the support plate (6); wherein the support plate (6) comprises a mounting groove (61), and the side of the first lower holder (203) facing the support plate (6) and the side of the second lower holder (303) facing the support plate (6) comprise a projection (7) corresponding to the mounting groove.

9. The pressure relief device according to any one of items 3-8, in which the side of the first lower holder (203) facing away from the second lower holder (303) comprises a limit plate (206), and if the limit plate (206) contacts the valve body (101), the first rupture disc (202) is moved to the correct position; wherein the side of the first upper holder (201) facing away from the first bursting membrane (202) comprises the first sealing ring, and the surface of the first lower holder (203) facing away from the first bursting membrane (202) comprises a lower annular groove, and the second sealing ring is located in the lower annular groove, respectively providing a seal between the support plate (6) and the valve body (101) and a seal between the first lower holder (203) and the second lower holder (303).

10. A pressure relief device according to any one of paragraphs 2 to 9, in which the switching mechanism (5) comprises a lifting frame (501), a valve stem nut (502), a valve stem (503), a trunnion (507) in a fork and a bolt; the lifting frame (501) is connected to one of the valve bodies (101) without the possibility of displacement; in the direction of movement of the sliding plate unit, the valve stem nut (502) is limited by a side of the lifting frame (501) and is configured to rotate relative to the lifting frame (501), an internal thread is provided inside the valve stem nut (502) coinciding with an external thread of the valve stem (503), and the valve stem (503) is driven axially by rotation of the valve stem nut (502); the end of the valve stem (503) is connected to the journal (507) in the fork, the first unit (2) of the sliding plate is connected to the connecting part, and the bolt passes through the connecting part and the journal (507) in the fork to connect the journal in the fork to the first unit (2) of the sliding plate; wherein the pressure relief device further comprises a clamping mechanism (1), in which the clamping mechanism (1) comprises 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 clamping block (111), a right clamping block (112), an eccentric link (108) of the shaft and a crank joint (110); each of the two valve bodies (101) comprises an intermediate flange (103); the first main drive shaft (104) and the second main drive shaft (105) are located on two opposite sides of one of the two valve bodies (101), respectively, and on the side of the intermediate flange (103) of one of the two valve bodies (101) facing away from the other valve body (101); the left pressure block (111) is connected to the end of the first main drive shaft (104) and the end of the second main drive shaft (105);the first auxiliary drive shaft (106) and the second auxiliary drive shaft (107) are located on two opposite sides of the other valve body (101), respectively, and on the side of the intermediate flange (103) of the other of the two valve bodies (101), facing away from the first main drive shaft (104); each of the two ends of the first main drive shaft (104) and each of the two ends of the first auxiliary drive shaft (106) are connected by an eccentric link (108) of the shaft, each of the two ends of the second main drive shaft (105) and each of the two ends of the second auxiliary drive shaft (107) are connected by an eccentric link (108) of the shaft, one end of the first main drive shaft (104) is connected to the drive mechanism, and the other end of the first main drive shaft (104) is connected to the second main drive shaft (105) by means of a crank connection (110);a crank connection (110) is provided between the first main drive shaft (104) and the second main drive shaft (105), which allows the first main drive shaft (104) to rotate the second main drive shaft (105); and the first main drive shaft (104) and the second main drive shaft (105) are eccentric rods.

11. A pressure relief device for implementing hot replacement of a rupture disc, installed in a flow relief position in a flow channel, which allows the pressure relief device to relieve the flow in the flow channel, and two opposite valve bodies (101) located in the flow relief position, in which the pressure relief device comprises a first sliding plate assembly (2) comprising a first rupture disc (202); a transfer mechanism (5), in which, after the rupture of the second bursting membrane (302) on the second unit (3) of the sliding plate, located between the two valve bodies (101), the transfer mechanism (5) is configured to transfer the first unit (2) of the sliding plate into the space between the two valve bodies (101) and to remove the second unit (3) of the sliding plate out of the two valve bodies (101) in such a way that the first bursting membrane (202) is moved into the flow channel.

12. A first sliding plate assembly for implementing hot replacement of a rupture disc, installed between two valve bodies (101) located opposite each other in a flow channel, in which the sliding plate assembly (2) is located between the two valve bodies (101), the rupture disc provided in the sliding plate assembly (2) is located within the flow channel for discharging the flow in the flow channel, wherein the third assembly (2) of the sliding plate comprises an integrated first rupture membrane (202) and an external first mating part; after the rupture of the fourth bursting membrane (302) in the fourth unit (3) of the sliding plate between the two valve bodies (101), the fourth mating part of the fourth unit (3) of the sliding plate is connected to the first mating part with the possibility of disconnection, the fourth unit (3) of the movable plate is designed with the possibility of being brought out of the two valve bodies (101), and the first unit (2) of the sliding plate is designed with the possibility of moving between the two valve bodies (101), which allows the bursting membrane (202) to be moved into the flow channel, wherein the first mating part or the fourth mating part is a projection, and the mating first mating part or the fourth mating part is a recess.

13. The first sliding plate assembly according to claim 12, wherein the projection is a connecting bolt (204) and the recess is a threaded hole (304).

14. A mounting device for implementing a hot replacement of a rupture disc, configured to mount a sliding plate assembly between two valve bodies (101) located opposite each other in a flow channel, in which, when the sliding plate assembly is located between the two valve bodies (101), a rupture disc provided in the sliding plate assembly is located within the flow channel for discharging a flow in the flow channel, wherein the mounting device comprises a support plate (6) configured to accommodate several sliding plate assemblies adjacent to each other, wherein the several sliding plate assemblies comprise a first sliding plate assembly (2) and a second sliding plate assembly (3); a transfer mechanism (5) designed with the possibility of moving the support plate (6), wherein, when the second assembly (3) of the sliding plate is located between the two valve bodies (101), and the rupture membrane (302) provided inside the second assembly (3) of the sliding plate ruptures, the second assembly (3) of the sliding plate is driven by the switching mechanism to move outward from the two valve bodies (101), and the first assembly (2) of the sliding plate is driven by the switching mechanism to move into the space between the two valve bodies (101), as a result of which the rupture membrane (202) located inside the first assembly (2) of the sliding plate will be moved into the flow channel.

15. A pressure system for implementing hot replacement of a rupture disc, comprising a flow channel, in which a pressure relief device according to any one of paragraphs 1-11 is located in the flow channel.

16. A pressure system for implementing hot replacement of a rupture disc, comprising a flow channel, in which the first assembly (2) of the sliding plate according to any of paragraphs 12, 13 is located in the flow channel.