A convenient disassembly and assembly low-pressure heater drain pump for nuclear power plants

Abstract

The present invention relates to the technical field of disassembly and assembly of low-pressure hydrophobic pumps, and discloses a convenient disassembly and assembly of low-pressure hydrophobic pumps for nuclear power plants, comprising a pump body and external pipe fittings, an inlet pipe and an outlet pipe arranged on the pump body, and also comprising a disassembly and assembly unit respectively arranged on the inlet pipe and the outlet pipe, wherein the disassembly and assembly unit comprises a connecting component respectively arranged at one end of the inlet pipe and the outlet pipe, and a releasing component arranged on the pump body; by arranging the connecting component, when the inlet and outlet water pipes need to be installed and connected to the inlet and outlet of the hydrophobic pump, the matching ring can be inserted into the connecting groove and rotated 90 degrees, and the matching ring can quickly connect the delivery pipe to the inlet and outlet water pipes of the delivery pump, and at the same time, the sealing element can ensure the sealing of the connection between the two; when the inlet and outlet water pipes need to be disassembled, the control button can be pressed to enable the limit assembly to release the limit on the limit plate, and the matching ring can be quickly reset under the action of the torsion spring, thereby realizing the rapid disassembly of the inlet and outlet water pipes.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly and assembly of a low-pressure heater drain pump, and in particular to a convenient disassembly and assembly low-pressure heater drain pump for a nuclear power plant. Background Art

[0002] A nuclear power plant is a highly complex energy production facility with extremely high safety requirements. In the steam circulation system of a nuclear power plant, after the steam drives the turbine to work, some steam will condense into drain. The primary function of the drain pump is to promptly extract this drain and return it to the steam generator or related systems, so that the steam cycle can operate continuously and stably, ensuring that the steam can be used efficiently, thereby maintaining the power generation efficiency of the nuclear power plant. If the drain cannot be discharged in time, it will accumulate inside the turbine, affecting the normal operation of the turbine blades, reducing the steam work efficiency, and causing a decrease in power generation.

[0003] In terms of the connection of the inlet and outlet pipes of the drain pump, welding and flange connections are common. Although these connection methods can make the drain pump work stably, there are still the following problems: once the welding connection is completed, the position of the pipe is basically fixed. If the relevant pipes need to be replaced or maintained, a lot of manpower and material resources need to be cut and re-welded. This process is time-consuming and labor-intensive. Although the flange connection can be removed, the number of connecting bolts is large, and installation and disassembly require the help of tools and equipment. It is extremely inconvenient to operate in the limited space of the nuclear power plant. Therefore, it is necessary to design a portable disassembly and assembly of the low-pressure drain pump to achieve rapid installation and connection of the inlet and outlet pipes on the drain pump. When the inlet and outlet pipes need to be replaced or maintained, the inlet and outlet pipes can be quickly disassembled to facilitate the replacement or maintenance work of the staff. Summary of the Invention

[0004] In view of the problem that welding or flange connection in the prior art makes it inconvenient for workers to install and disassemble the inlet and outlet pipes, a convenient disassembly and assembly low-pressure heater drain pump for nuclear power plants is proposed.

[0005] The present application provides a convenient disassembly and assembly of a low-pressure drain pump for a nuclear power plant, the purpose of which is: by setting a connecting component, when the staff needs to install and connect the inlet and outlet water pipes to the inlet and outlet of the drain pump, they can insert the matching ring into the connecting groove and rotate it 90°, so that the matching ring can quickly connect the delivery pipe to the inlet and outlet water pipes of the delivery pump, and at the same time the sealing element can ensure the sealing of the connection between the two. When the staff needs to disassemble the inlet and outlet water pipes, they can press the control button to make the limit assembly release the limit on the limit plate, and the matching ring is quickly reset under the action of the torsion spring, thereby realizing the rapid disassembly of the inlet and outlet water pipes.

[0006] The technical solution of the present invention is: a convenient detachable low-pressure heater drain pump for a nuclear power plant, comprising a pump body and external pipe fittings, an inlet pipe and an outlet pipe provided on the pump body, and a detachable assembly unit provided on the inlet pipe and the outlet pipe, respectively, the detachable assembly unit comprising a connecting component provided on the end of the inlet pipe and the outlet pipe away from the pump body, and a releasing component provided on the pump body;

[0007] The connecting component includes an annular connecting disk respectively provided on the outer walls of the inlet pipe and the outlet pipe, a circumferential connecting groove provided at one end of the connecting disk away from the pump body, a trigger ring rotatably provided in the connecting groove, two control blocks provided on the side wall of the trigger ring away from the pump body, a torsion spring provided between the trigger ring and the inner wall of the connecting groove, a semicircular communicating groove provided on the inner ring wall of the connecting disk, and the connecting groove is connected to the communicating groove, a plurality of synchronizing plates provided on the inner wall of the trigger ring, a rotating cylinder provided on the side walls of the plurality of synchronizing plates, the rotating cylinder being located on the inner wall of the connecting disk, and one end of the plurality of synchronizing plates passing through the communicating groove and fixedly connected to the outer wall of the rotating cylinder, annular grooves provided on the side walls of the inlet pipe and the outlet pipe, and a limit disk provided on the outer wall of the rotating cylinder;

[0008] The limit plate is located in the annular groove, a sliding assembly is installed on the inner wall of the rotating cylinder, a limit assembly is installed between the limit plate and the pump body, the two control blocks are respectively located at the upper and lower ends of the trigger ring and are symmetrical to each other, the end face shape of the connecting groove is annular, and square grooves are symmetrically opened on the groove wall close to the outer side of the connecting groove.

[0009] Furthermore, the sliding assembly includes a spiral groove opened on the inner wall of the rotating cylinder, a sliding cylinder slidably arranged on the inner wall of the rotating cylinder, a protruding rod arranged on the side wall of the sliding cylinder, the protruding rod is slidably installed in the spiral groove, and a sealing element is installed inside the sliding cylinder.

[0010] Furthermore, the sealing element includes a mounting groove provided inside the side wall of the sliding cylinder, a plurality of transformer sleeves arranged inside the mounting groove, a plurality of piston plates slidably provided inside the plurality of transformer sleeves, a plurality of fixing plates respectively provided on the inner walls of the inlet pipe and the outlet pipe, a fixing rod provided between the plurality of fixing plates and the corresponding piston plates, an annular groove provided on the outer side wall of the sliding cylinder, an expansion rubber ring provided in the annular groove, and a connecting pipe provided between the side walls of the plurality of transformer sleeves and the corresponding expansion rubber rings.

[0011] Furthermore, the limiting assembly includes a spring rod arranged on the side wall of the limiting plate, a supporting plate arranged on the outer wall of the outlet pipe, a quarter slot opened on the supporting plate and the side wall of the pump body, and a locking hole opened at the end of the quarter slot.

[0012] Furthermore, one end of the two spring rods is slidably installed in the corresponding quarter slot, the two spring rods are in a compressed state in the initial state, and the end face shape and size of one end of the two spring rods are slightly smaller than the end face shape and size of the corresponding locking hole.

[0013] Furthermore, the release component includes a connecting block arranged between the pump body and the carrying plate, a control button arranged on a side wall of the connecting block, and a spring block arranged in the two positioning holes.

[0014] Furthermore, a password box is provided on the side wall of the connecting block, and the control button is located inside the password box.

[0015] Furthermore, the outer pipe fitting includes a delivery pipe, a mating ring arranged on the outer wall of the delivery pipe, a mating block symmetrically arranged on the outer wall of the mating ring, and a mating groove opened on the side wall of the mating block. The end face shape and size of the mating block and the square groove are the same, the end face shape and size of the control block and the mating groove are the same, and the diameter of the delivery pipe is slightly larger than the diameter of the sliding cylinder.

[0016] Beneficial effects of the present invention:

[0017] 1. By setting up the connecting parts, the staff can insert the matching ring into the connecting groove and rotate it 90 degrees, and then drive the trigger ring to rotate 90 degrees synchronously. The limit assembly will fix the trigger ring so that the matching ring is firmly connected to the connecting disk. At the same time, the delivery pipe and the inlet and outlet pipes are fixedly connected through the sliding cylinder. The staff only needs to rotate 90 degrees to quickly install the delivery pipe at the inlet and outlet pipes, which provides portability for the staff's installation and effectively improves the staff's installation efficiency.

[0018] 2. By setting up a sliding assembly and a sealing element, during the connection process, the internal sliding cylinder slides inward a certain distance. During the sliding process, the sliding cylinder and the fixed plate are relatively displaced. Under the action of the fixed rod, the gas in the transformer sleeve is pushed into the expansion rubber ring to expand the expansion rubber ring. During the expansion process, the expansion rubber ring fills the gap between the sliding cylinder and the delivery pipe, ensuring the sealing between the sliding cylinder and the delivery pipe while quickly installing the delivery pipe and the inlet and outlet pipes.

[0019] 3. By setting a torsion spring and a release component, when the staff needs to quickly disassemble the delivery pipe at the inlet and outlet pipes, they only need to press the control button to make the spring block slide outward along the positioning hole and push the spring rod out of the corresponding positioning hole. The spring rod no longer limits the corresponding limit plate, so that under the torsional force of the torsion spring, the trigger ring in the connecting groove is quickly reset, and then the matching ring is synchronously reset, so that the staff can directly remove the matching ring from the connecting groove to complete the rapid disassembly of the delivery pipe. By setting a password box, it is effectively avoided that the control button is accidentally touched during daily work, which improves the rapid disassembly of the hydrophobic pump while ensuring the safety of the hydrophobic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the outer pipe component of the present invention to be installed;

[0021] Figure 2 This is a schematic diagram of the connection structure between the pump body and the inlet pipe of the present invention;

[0022] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0023] Figure 4 For the present invention Figure 2 Front view planar structure diagram;

[0024] Figure 5 It is a schematic structural diagram of the connecting component of the present invention;

[0025] Figure 6 This is a schematic diagram of the trigger ring installation structure of the present invention;

[0026] Figure 7 It is a schematic diagram of a partial cross-sectional structure of the connection disk of the present invention;

[0027] Figure 8 This is a schematic diagram of the sliding cylinder installation structure of the present invention;

[0028] Figure 9 It is a schematic diagram of the exploded structure of the connecting component of the present invention;

[0029] Figure 10 This is a schematic diagram of the water pipe installation structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of the outer pipe member of the present invention;

[0031] Figure 12 It is a schematic structural diagram of the sealing element of the present invention.

[0032] In the picture:

[0033] 1. Pump body; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting plate; 5. Trigger ring; 6. Control block; 7. Torsion spring; 8. Synchronizing plate; 9. Rotating cylinder; 10. Ring groove; 11. Limiting plate; 12. Spiral groove; 13. Sliding cylinder; 14. Protruding rod; 15. Voltage transformer sleeve; 16. Piston plate; 17. Fixed plate; 18. Fixed rod; 19. Expansion rubber ring; 20. Connecting pipe; 21. Spring rod; 22. Carrying plate; 23. Quarter slot; 24. Positioning hole; 25. Connecting block; 26. Control button; 27. Delivery pipe; 28. Matching ring; 29. ​​Matching block; 30. Matching groove. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] Example 1, reference Figure 1 、 Figure 4 as well as Figure 7-11 , which is the first embodiment of the present invention, provides a convenient disassembly and assembly low-pressure heater drain pump for a nuclear power plant, including a pump body 1 and external pipe fittings, an inlet pipe 2 and an outlet pipe 3 arranged on the pump body 1, and also includes a disassembly and assembly unit respectively installed on the inlet pipe 2 and the outlet pipe 3, the disassembly and assembly unit including a connecting component respectively installed on the end of the inlet pipe 2 and the outlet pipe 3 away from the pump body 1, and a releasing component installed on the pump body 1.

[0036] The connecting components include an annular connecting disk 4 fixedly mounted on the outer walls of the inlet pipe 2 and the outlet pipe 3 respectively, a circumferential connecting groove provided at the end of the connecting disk 4 away from the pump body 1, a trigger ring 5 rotatably mounted in the connecting groove, two control blocks 6 fixedly mounted on the side wall of the trigger ring 5 away from the pump body 1, a torsion spring 7 fixedly mounted between the trigger ring 5 and the inner wall of the connecting groove, a semicircular communicating groove provided on the inner ring wall of the connecting disk 4, and the connecting groove is connected to the communicating groove, a plurality of synchronous plates 8 fixedly mounted on the inner wall of the trigger ring 5, a rotating cylinder 9 fixedly mounted on the side walls of the plurality of synchronous plates 8, the rotating cylinder 9 is located on the inner wall of the connecting disk 4, and one end of the plurality of synchronous plates 8 passes through the communicating groove and is fixedly connected to the outer wall of the rotating cylinder 9, an annular groove 10 provided on the side walls of the inlet pipe 2 and the outlet pipe 3, and a limit disk 11 fixedly mounted on the outer wall of the rotating cylinder 9.

[0037] The limit plate 11 is located in the annular groove 10, a sliding assembly is installed on the inner wall of the rotating cylinder 9, a limit assembly is installed between the limit plate 11 and the pump body 1, the two control blocks 6 are respectively located at the upper and lower ends of the trigger ring 5 and are symmetrical to each other, the end face shape of the connecting groove is annular, and square grooves are symmetrically opened on the groove wall near the outer side of the connecting groove.

[0038] The limit assembly includes a spring rod 21 fixedly mounted on the side wall of the limit plate 11, a support plate 22 fixedly mounted on the outer wall of the outlet pipe 3, a quarter-slot 23 defined in the support plate 22 and the side wall of the pump body 1, and a locking hole 24 defined at the end of the quarter-slot 23. One end of each spring rod 21 is slidably mounted within its corresponding quarter-slot 23. Initially, the two spring rods 21 are compressed, and the end faces of one end of each spring rod 21 are slightly smaller than the end faces of the corresponding locking holes 24. The external pipe assembly includes a delivery pipe 27, a mating ring 28 rotatably mounted on the outer wall of the delivery pipe 27, a mating block 29 symmetrically fixedly mounted on the outer wall of the mating ring 28, and a mating slot 30 defined on the side wall of the mating block 29. The mating block 29 has the same end face shape and size as the square slot. The control block 6 has the same end face shape and size as the mating slot 30. The diameter of the delivery pipe 27 is slightly larger than that of the sliding cylinder 13. A spiral groove 12 is provided on the inner wall of the rotating cylinder 9 , and a sliding cylinder 13 is slidably mounted on the inner wall of the rotating cylinder 9 .

[0039] Specifically, the connecting component is used to quickly fix the matching ring 28 in the connecting groove of the corresponding connecting disk 4. When the matching ring 28 is just inserted into the connecting groove, the control block 6 is just inserted into the matching groove 30 on the matching block 29 at the same time. At this time, the staff rotates the matching ring 28 and rotates it 90°. At this time, the matching ring 28 is inserted into the connecting groove in the connecting disk 4, and the matching ring 28 is quickly fixed and connected to the connecting disk 4. At the same time, because the inner ring of the matching ring 28 is the conveying tube 27, and the inner ring of the connecting disk 4 is the sliding cylinder 13, then when the matching ring 28 is installed on the connecting disk 4, one end of the sliding cylinder 13 is just located inside the conveying tube 27. When the staff rotates the matching ring 28, the control block 6 is just inserted into the matching groove 30 on the matching ring 28, so that when the matching ring 28 rotates, the matching groove 30 will generate a torsional force on the control block 6, and the direction of the torsional force is the same as the direction of rotation of the matching ring 28. The block 6 drives the trigger ring 5 to rotate synchronously under the action of the torsional force. During the rotation of the trigger ring 5, the rotating cylinder 9 in the inner wall of the connecting disk 4 is driven to rotate synchronously through the synchronous plate 8. The rotation of the rotating cylinder 9 drives the spring rod 21 on the limit disk 11 to move along the corresponding quarter groove 23. When the matching ring 28 rotates 90°, the spring rod 21 rotates 90° synchronously, so that the spring rod 21 just moves to the corresponding positioning hole 24. Because the spring rod 21 is in a compressed state in the initial state, when the spring rod 21 rotates to the positioning hole 24, the spring rod 21 in the compressed state quickly bounces into the positioning hole 24 under the action of the elastic force, so that the positioning hole 24 limits the spring rod 21, and then limits the matching ring 28, so that one end of the matching ring 28 is always located in the connecting groove, completing the matching ring 28 being limited and fixed in the connecting groove, and realizing rapid fixed connection between the matching ring 28 and the connecting disk 4.

[0040] During use, when the staff needs to install the delivery pipe 27 on the inlet pipe 2 and the outlet pipe 3 of the hydrophobic pump, the staff aligns the matching ring 28 on the delivery pipe 27 with the connecting groove on the corresponding connecting disk 4, and inserts the matching ring 28 into the connecting groove. After insertion, one end of the sliding cylinder 13 is just located inside the delivery pipe 27. At this time, the matching groove 30 on the side wall of the matching block 29 on the matching ring 28 is inserted into the control block 6 on the side wall of the trigger ring 5. After the insertion is completed, the staff rotates the matching ring 28 so that the matching ring 28 rotates 90° in the connecting groove. When the matching ring 28 rotates 90°, the torsion spring 7 twists, and at the same time, the matching ring 28 is firmly stuck in the connecting groove through the matching block 29. When the staff rotates the matching ring 28, the matching ring 28 drives the corresponding trigger ring 5 to rotate synchronously through the control block 6, and the trigger ring 5 drives the rotating cylinder 9 to rotate through the synchronous plate 8. The rotation of the rotating cylinder 9 drives the corresponding spring rod 21 to move in the quarter groove 23 through the limit plate 11. When the matching ring 28 rotates 90°, one end of the spring rod 21 is just stuck in the positioning hole 24 under the action of elastic force, so that the spring rod 21 limits the limit plate 11 to prevent resetting, and then limits the trigger ring 5 and the matching ring 28, ensuring that the matching ring 28 is stably limited in the connecting groove, completing the quick connection and communication between the delivery pipe 27 and the sliding cylinder 13. At the same time, because one end of the sliding cylinder 13 is connected with the corresponding inlet pipe 2 and outlet pipe 3, the delivery pipe 27 is quickly connected with the corresponding inlet pipe 2 or outlet pipe 3.

[0041] Example 2, reference Figure 5-Figure 6 、 Figure 9 as well as Figure 12 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the sliding assembly includes a spiral groove 12 opened on the inner wall of the rotating cylinder 9, a sliding cylinder 13 slidably installed on the inner wall of the rotating cylinder 9, and a protruding rod 14 fixedly installed on the side wall of the sliding cylinder 13. The protruding rod 14 is slidably installed in the spiral groove 12, and a sealing element is installed inside the sliding cylinder 13.

[0042] The sealing element includes a mounting groove provided inside the side wall of the sliding cylinder 13, a plurality of transformer sleeves 15 fixedly installed inside the mounting groove, a plurality of piston plates 16 respectively slidably installed inside the plurality of transformer sleeves 15, a plurality of fixed plates 17 respectively fixedly installed on the inner walls of the inlet pipe 2 and the outlet pipe 3, a fixing rod 18 fixedly installed between the plurality of fixed plates 17 and the corresponding piston plates 16, an annular groove provided on the outer side wall of the sliding cylinder 13, an expansion rubber ring 19 fixedly installed in the annular groove, and a connecting pipe 20 fixedly installed between the side walls of the plurality of transformer sleeves 15 and the corresponding expansion rubber rings 19.

[0043] Specifically, the interior of multiple transformer sleeves 15 is filled with hydraulic oil, and the function of the sealing element is: when the staff installs the matching ring 28 in the connecting groove, the sealing element can seal the gap between the delivery pipe 27 and the sliding cylinder 13, ensuring the sealing between the delivery pipe 27 and the inlet pipe 2 and the outlet pipe 3. The specific process is as follows: when the staff aligns the matching ring 28 and inserts it into the connecting groove and rotates the matching ring 28, the trigger ring 5 in the connecting disk 4 drives the rotating cylinder 9 to rotate synchronously through the synchronous plate 8. Because the sliding cylinder 13 is limited in the axial direction by multiple fixed plates 17 and the fixed rod 18, when the sliding cylinder 13 rotates, the spiral groove 12 and the protruding rod 14 can cooperate with each other to make the sliding cylinder 13 slide inward in the horizontal direction. During the inward sliding process of the sliding cylinder 13, the transformer sleeve 15 in its internal mounting groove is driven to move synchronously, and because the piston plate 16 is limited by the corresponding fixed rod 18, the piston plate 16 will not move in the horizontal direction. The displacement on the piston plate 16 is caused by the displacement of the piston plate 16. Therefore, when the transformer sleeve 15 moves inward in the horizontal direction as the sliding cylinder 13 moves inward, the piston plate 16 will slide relatively in the opposite direction along the transformer sleeve 15, so that when the piston plate 16 moves in the opposite direction, the hydraulic oil inside the transformer sleeve 15 is pressed into the corresponding expansion rubber ring 19 through the connecting pipe 20. When the internal hydraulic oil of the transformer sleeve 15 is pressed into the expansion rubber ring 19, the expansion rubber ring 19 expands, and the expansion rubber ring 19 can fill the gap between the sliding cylinder 13 and the delivery pipe 27, thereby ensuring the sealing between the sliding cylinder 13 and the delivery pipe 27 (because the end of the sliding cylinder 13 away from the delivery pipe 27 is connected to the inlet pipe 2 and the outlet pipe 3, thereby ensuring the sealing between the sliding cylinder 13 and the delivery pipe 27, which is equivalent to ensuring the sealing between the inlet pipe 2 and the outlet pipe 3 and the delivery pipe 27), thereby ensuring the sealing of the two while being able to quickly install the delivery pipe 27 on the inlet pipe 2 and the outlet pipe 3.

[0044] During use, when the staff rotates the matching ring 28 so that the matching ring 28 is firmly limited in the connecting groove, the rotating cylinder 9 rotates synchronously. The rotation of the rotating cylinder 9 drives the sliding cylinder 13 to move inward in the horizontal direction through the mutual cooperation of the spiral groove 12 and the protruding rod 14. During the inward movement of the sliding cylinder 13, the transformer sleeve 15 in the internal mounting groove is driven to move synchronously, and the piston plate 16 remains stationary under the limit of the fixed rod 18, so that during the movement of the transformer sleeve 15, the piston plate 16 slides in the opposite direction relative to the transformer sleeve 15. Then, during the horizontal movement of the transformer sleeve 15, the piston plate 16 squeezes the hydraulic oil in the transformer sleeve 15 into the inside of the expansion rubber ring 19, causing the expansion rubber ring 19 to expand. The expansion rubber ring 19 is located between the inner wall of the delivery pipe 27 and the outer wall of the sliding cylinder 13, so that the expanded expansion rubber ring 19 fills the gap between the two, ensuring the sealing between the delivery pipe 27 and the sliding cylinder 13, and then indirectly ensuring the sealing between the delivery pipe 27 and the inlet pipe 2 and the outlet pipe 3, thereby ensuring the normal operation of the hydrophobic pump.

[0045] The remaining structures are the same as those of Example 1.

[0046] Example 3, reference Figure 2-Figure 3 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that the release component includes a connecting block 25 fixedly mounted between the pump body 1 and the carrier plate 22, a control button 26 mounted on the side wall of the connecting block 25, and a spring block (not shown) slidably mounted between the two locking holes 24. A code box (not shown) is fixedly mounted on the side wall of the connecting block 25, and the control button 26 is located inside the code box.

[0047] Specifically, the control button 26 controls the two spring blocks through a button linkage assembly (not shown in the figure). When the button is pressed, the spring blocks are controlled to pop out along the corresponding positioning holes 24 through a connecting rod, cam or other transmission components (because the button linkage assembly is not a technical point of the present invention and can be replaced by multiple existing technologies, the button linkage assembly is not introduced in detail in the present invention). When the spring blocks pop out, one end of the spring rod 21 inside the positioning hole 24 can be popped out of the positioning hole 24. After one end of the spring rod 21 is popped out of the positioning hole 24, the trigger ring 5 drives the mating ring 28 to rotate synchronously and reset under the torsional force of the torsion spring 7, and then the mating ring 28 can be quickly removed from the connecting disk 4 through the control button 26. The password box is used to protect the control button 26 to prevent the staff or external factors from accidentally touching the control button 26 when the drain pump is working normally, causing the matching ring 28 to separate the delivery pipe 27 from the corresponding inlet pipe 2 and outlet pipe 3 and causing an accident. Only when the staff needs to remove the delivery pipe 27 from the inlet pipe 2 and outlet pipe 3 can they perform the operation by opening the password box and pressing the control button 26.

[0048] During use, when the staff needs to remove the delivery pipe 27 from the inlet pipe 2 or the outlet pipe 3, the staff opens the password box and presses the internal control button 26, so that the control button 26 controls the spring block inside the positioning hole 24 to pop out outward, and the popped-out spring block pops out the spring rod 21 stuck in the positioning hole 24. The popped-out spring rod 21 loses the limit on the limit plate 11, so that the trigger ring 5 is reset under the action of the torsional force of the torsion spring 7, and then drives the matching ring 28 to reset synchronously. The reset matching ring 28 can be easily taken out of the connecting groove, thereby realizing the rapid removal of the delivery pipe 27 from the connecting plate 4.

[0049] The remaining structures are the same as those of Example 2.

[0050] Based on Examples 1-3, the working principle of the present invention is as follows: when the staff needs to install the delivery pipe 27 on the inlet pipe 2 and the outlet pipe 3 of the hydrophobic pump, the staff aligns the matching ring 28 on the delivery pipe 27 with the connecting groove on the corresponding connecting plate 4, and inserts the matching ring 28 into the connecting groove. After insertion, one end of the sliding cylinder 13 is just located inside the delivery pipe 27. At this time, the matching groove 30 on the side wall of the matching block 29 on the matching ring 28 is inserted into the control block 6 on the side wall of the trigger ring 5. After the insertion is completed, the staff rotates the matching ring 28 so that the matching ring 28 rotates 90° in the connecting groove. When the matching ring 28 rotates 90°, the torsion spring 7 is twisted, and at the same time, the matching ring 28 is firmly stuck in the connecting groove through the matching block 29. When the staff rotates the matching ring 28 During the process, the matching ring 28 drives the corresponding trigger ring 5 to rotate synchronously through the control block 6, and the trigger ring 5 drives the rotating cylinder 9 to rotate through the synchronous plate 8. The rotating cylinder 9 rotates and drives the corresponding spring rod 21 to move in the quarter groove 23 through the limit plate 11. When the matching ring 28 rotates 90°, one end of the spring rod 21 is just stuck in the positioning hole 24 under the action of elastic force, so that the spring rod 21 limits the limit plate 11 to prevent resetting, and then limits the trigger ring 5 and the matching ring 28, ensuring that the matching ring 28 is stably limited in the connecting groove, completing the quick connection and communication between the delivery pipe 27 and the sliding cylinder 13. At the same time, because one end of the sliding cylinder 13 is connected with the corresponding inlet pipe 2 and outlet pipe 3, the delivery pipe 27 is quickly connected with the corresponding inlet pipe 2 or outlet pipe 3.

[0051] When the staff rotates the matching ring 28 so that the matching ring 28 is firmly limited in the connecting groove, the rotating cylinder 9 rotates synchronously. The rotating cylinder 9 rotates through the mutual cooperation between the spiral groove 12 and the protruding rod 14, driving the sliding cylinder 13 to move inward in the horizontal direction. During the inward movement of the sliding cylinder 13, the transformer sleeve 15 in the internal mounting groove is driven to move synchronously, and the piston plate 16 remains stationary under the limit of the fixed rod 18, so that during the movement of the transformer sleeve 15, the piston plate 16 slides in the opposite direction relative to the transformer sleeve 15. Then, during the horizontal movement of the transformer sleeve 15, the piston plate 16 squeezes the hydraulic oil in the transformer sleeve 15 into the inside of the expansion rubber ring 19, causing the expansion rubber ring 19 to expand. The expansion rubber ring 19 is located between the inner wall of the delivery pipe 27 and the outer wall of the sliding cylinder 13, so that the expanded expansion rubber ring 19 fills the gap between the two, ensuring the sealing between the delivery pipe 27 and the sliding cylinder 13, and then indirectly ensuring the sealing between the delivery pipe 27 and the inlet pipe 2 and the outlet pipe 3, thereby ensuring the normal operation of the hydrophobic pump.

[0052] When the staff needs to remove the delivery pipe 27 from the inlet pipe 2 or the outlet pipe 3, the staff opens the password box and presses the control button 26 inside, so that the control button 26 controls the spring block inside the positioning hole 24 to pop out outward, and the popped-out spring block pops out the spring rod 21 stuck in the positioning hole 24. The popped-out spring rod 21 loses the limit on the limit plate 11, so that the trigger ring 5 is reset under the torsional force of the torsion spring 7, and then drives the matching ring 28 to reset synchronously. The reset matching ring 28 can be easily taken out of the connecting groove, thereby realizing the rapid removal of the delivery pipe 27 from the connecting plate 4.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable detachable low-pressure heater drain pump for a nuclear power plant, comprising a pump body and external piping, an inlet pipe and an outlet pipe provided on the pump body, characterized in that: It also includes a disassembly unit respectively provided on the inlet pipe and the outlet pipe, the disassembly unit including a connecting component respectively provided on the end of the inlet pipe and the outlet pipe away from the pump body and a releasing component provided on the pump body; The connecting component includes an annular connecting disk respectively provided on the outer walls of the inlet pipe and the outlet pipe, a circumferential connecting groove provided at one end of the connecting disk away from the pump body, a trigger ring rotatably provided in the connecting groove, two control blocks provided on the side wall of the trigger ring away from the pump body, a torsion spring provided between the trigger ring and the inner wall of the connecting groove, a semicircular communicating groove provided on the inner ring wall of the connecting disk, and the connecting groove is connected to the communicating groove, a plurality of synchronizing plates provided on the inner wall of the trigger ring, a rotating cylinder provided on the side walls of the plurality of synchronizing plates, the rotating cylinder being located on the inner wall of the connecting disk, and one end of the plurality of synchronizing plates passing through the communicating groove and fixedly connected to the outer wall of the rotating cylinder, annular grooves provided on the side walls of the inlet pipe and the outlet pipe, and a limit disk provided on the outer wall of the rotating cylinder; The limit plate is located in the annular groove, a sliding assembly is installed on the inner wall of the rotating cylinder, and a limit assembly is installed between the limit plate and the pump body. The two control blocks are respectively located at the upper and lower ends of the trigger ring and are symmetrical to each other. The end face of the connecting groove is annular in shape, and square grooves are symmetrically opened on the groove wall close to the outer side of the connecting groove. The sliding assembly includes a spiral groove formed on the inner wall of the rotating cylinder, a sliding cylinder slidably mounted on the inner wall of the rotating cylinder, and a protruding rod provided on the side wall of the sliding cylinder. The protruding rod is slidably mounted in the spiral groove. A sealing element is installed inside the sliding cylinder. The sealing element includes a mounting groove provided inside the side wall of the sliding cylinder, a plurality of transformer sleeves arranged inside the mounting groove, a plurality of piston plates slidably provided inside the plurality of transformer sleeves, a plurality of fixing plates respectively provided on the inner walls of the inlet pipe and the outlet pipe, a fixing rod provided between the plurality of fixing plates and the corresponding piston plates, an annular groove provided on the outer side wall of the sliding cylinder, an expansion rubber ring provided in the annular groove, and a connecting pipe provided between the side walls of the plurality of transformer sleeves and the corresponding expansion rubber rings.

2. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 1, characterized in that: The limiting assembly includes a spring rod arranged on the side wall of the limiting plate, a supporting plate arranged on the outer wall of the outlet pipe, a quarter slot opened on the supporting plate and the side wall of the pump body, and a positioning hole opened at the end of the quarter slot.

3. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 2, characterized in that: One end of the two spring rods is slidably installed in the corresponding quarter slot. The two spring rods are in a compressed state in the initial state. The end face shape and size of one end of the two spring rods are slightly smaller than the end face shape and size of the corresponding locking hole.

4. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 2, characterized in that: The releasing component includes a connecting block arranged between the pump body and the carrying plate, a control button arranged on the side wall of the connecting block, and a spring block arranged in the two positioning holes.

5. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 4, characterized in that: A password box is provided on the side wall of the connecting block, and the control button is located inside the password box.

6. The portable detachable low-pressure heater drain pump for a nuclear power plant according to claim 2, characterized in that: The outer pipe fitting includes a delivery pipe, a matching ring arranged on the outer wall of the delivery pipe, a matching block symmetrically arranged on the outer wall of the matching ring, and a matching groove opened on the side wall of the matching block. The end face shape and size of the matching block and the square groove are the same, the control block and the end face shape and size of the matching groove are the same, and the diameter of the delivery pipe is slightly larger than the diameter of the sliding cylinder.

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