Portable disassembly and assembly low-pressure heater drainage pump for nuclear power station

Abstract

The invention relates to the technical field of disassembly and assembly of low-pressure heater drainage pumps, and discloses a conveniently disassembled and assembled low-pressure heater drainage pump for a nuclear power plant, which comprises a pump body, an outer pipeline piece, an inlet pipe and an outlet pipe arranged on the pump body, and disassembly and assembly units respectively arranged on the inlet pipe and the outlet pipe, the disassembly and assembly unit comprises connecting parts arranged at one end of the inlet pipe and one end of the outlet pipe respectively and a release part arranged on the pump body. By arranging the connecting part, when the water inlet and outlet pipeline needs to be installed and connected to an inlet and an outlet of the drainage pump, the matching ring can be inserted into the connecting groove and rotate by 90 degrees, the matching ring can rapidly connect the conveying pipe with the water inlet and outlet pipe of the conveying pump, and meanwhile the sealing element can guarantee the connection sealing performance of the conveying pipe and the water inlet and outlet pipe; the control button can be pressed to enable the limiting assembly to relieve limiting of the limiting disc, the matching ring is rapidly reset under the action of the torsion spring, and rapid disassembly of the water inlet and outlet pipeline is achieved.

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, some of the steam will condense into drain after the steam drives the turbine to do work. The primary function of the drain pump is to extract the drain in time and send it back 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 water pipes of the drain pump, welding and flange connection 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 pipeline is basically fixed. If the relevant pipelines need to be replaced or maintained, a lot of manpower and material resources are required to cut and re-weld. 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 the rapid installation and connection of the inlet and outlet water pipes on the drain pump. When the inlet and outlet water pipes need to be replaced or maintained, the inlet and outlet water 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 water 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 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 disassembly and assembly low-pressure heater drain pump for a nuclear power plant, comprising a pump body and an external pipe fitting, 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 on one end of the inlet pipe and the outlet pipe away from the pump body, and a releasing component arranged on the pump body; The connecting component includes an annular connecting disk respectively arranged on the outer wall 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 arranged 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 connecting groove provided on the inner ring wall of the connecting disk, and the connecting groove is connected with the connecting groove, a plurality of synchronous plates provided on the inner wall of the connecting disk, a rotating cylinder provided on the side walls of the plurality of synchronous plates, the rotating cylinder is located on the inner wall of the connecting disk, and one end of the plurality of synchronous plates passes through the connecting groove and is 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, 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.

[0007] 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.

[0008] Furthermore, the sealing element includes an installation groove opened inside the side wall of the sliding cylinder, a plurality of transformer sleeves arranged inside the installation groove, a plurality of piston plates slidably arranged inside the plurality of transformer sleeves, a plurality of fixing plates respectively arranged on the inner walls of the inlet pipe and the outlet pipe, a fixing rod arranged between the plurality of fixing plates and the corresponding piston plates, an annular groove opened on the outer side wall of the sliding cylinder, an expansion rubber ring arranged in the annular groove, and a connecting pipe arranged between the side walls of the plurality of transformer sleeves and the corresponding expansion rubber rings.

[0009] 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.

[0010] 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.

[0011] 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 on two locking holes.

[0012] Furthermore, a password box is arranged on the side wall of the connecting block, and the control button is located inside the password box.

[0013] Furthermore, the outer pipe fitting includes a conveying pipe, a matching ring arranged on the outer wall of the conveying 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 connecting groove are the same, the end face shape and size of the control block and the matching groove are the same, and the diameter of the conveying pipe is slightly larger than the diameter of the sliding cylinder.

[0014] Beneficial effects of the present invention: By setting up the connecting components, the staff can insert the matching ring into the connecting groove and rotate it 90°, and then drive the trigger ring to rotate 90° synchronously. The limiting 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, so that the staff only needs to rotate 90° 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.

[0015] By setting the sliding assembly and the sealing element, during the connection process, the internal sliding cylinder slides inwards for a certain distance, and the sliding cylinder is relatively displaced with the fixed plate during the sliding process. 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, and the sealing between the sliding cylinder and the delivery pipe is ensured while the delivery pipe and the inlet and outlet pipes are quickly installed.

[0016] By setting a torsion spring and a release component, when the staff needs to quickly disassemble the delivery pipe at the inlet and outlet pipelines, 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 torsion 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 take the matching ring out of the connecting groove to complete the rapid disassembly of the delivery pipe. By setting a password box, the accidental touching of the control button during daily work can be effectively avoided, which improves the rapid disassembly of the drain pump and ensures the safety of the drain pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the outer pipe member of the present invention to be installed; Figure 2 It is a schematic diagram of the connection structure between the pump body and the inlet pipe of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 For the present invention Figure 2 Front view of the planar structure diagram; Figure 5 It is a schematic diagram of the structure of the connecting component of the present invention; Figure 6 It is a schematic diagram of the installation structure of the trigger ring of the present invention; Figure 7 It is a partial cross-sectional structural schematic diagram of the connection disk of the present invention; Figure 8 It is a schematic diagram of the installation structure of the sliding cylinder of the present invention; Fig. 9 It is a schematic diagram of the exploded structure of the connecting component of the present invention; Fig.10 It is a schematic diagram of the water pipe installation structure of the present invention; Fig.11 It is a schematic diagram of the structure of the outer pipe member of the present invention; Fig.12 It is a schematic diagram of the sealing element structure of the present invention.

[0018] In the figure: 1. Pump body; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting plate; 5. Trigger ring; 6. Control block; 7. Torsion spring; 8. Synchronous plate; 9. Rotating cylinder; 10. Ring groove; 11. Limiting plate; 12. Spiral groove; 13. Sliding cylinder; 14. Protruding rod; 15. 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 groove; 24. Positioning hole; 25. Connecting block; 26. Control button; 27. Delivery pipe; 28. Matching ring; 29. ​​Matching block; 30. Matching groove. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0020] Example 1, reference Figure 1 , Figure 4 as well as Figure 7-Figure 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 an external pipe fitting, 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 includes 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.

[0021] 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 connecting groove provided on the inner ring wall of the connecting disk 4, and the connecting grooves are connected to the connecting grooves, a plurality of synchronous plates 8 fixedly mounted on the inner wall of the connecting disk 4, 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 connecting 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.

[0022] 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 close to the outer side of the connecting groove.

[0023] The limiting assembly includes a spring rod 21 fixedly mounted on the side wall of the limiting plate 11, a bearing plate 22 fixedly mounted on the outer wall of the outlet pipe 3, a quarter slot 23 provided on the bearing plate 22 and the side wall of the pump body 1, and a positioning hole 24 provided at the end of the quarter slot 23. One end of the two spring rods 21 is slidably mounted in the corresponding quarter slot 23, the two spring rods 21 are in a compressed state in the initial state, and the end face shape and size of one end of the two spring rods 21 are slightly smaller than the end face shape and size of the corresponding positioning hole 24. The outer pipe member includes a delivery pipe 27, a matching ring 28 rotatably mounted on the outer wall of the delivery pipe 27, a matching block 29 fixedly mounted symmetrically on the outer wall of the matching ring 28, and a matching groove 30 provided on the side wall of the matching block 29. The end face shape and size of the matching block 29 and the connecting groove are the same, the end face shape and size of the control block 6 and the matching groove 30 are the same, and the diameter of the delivery pipe 27 is slightly larger than the diameter 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 .

[0024] 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, because the control block 6 is just inserted into the matching groove 30 on the matching ring 28, 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, one end of 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, and the matching ring 28 is limited and fixed in the connecting groove, so that the matching ring 28 is quickly fixed to the connecting disk 4.

[0025] During use, when the staff needs to install the delivery pipe 27 on the inlet pipe 2 and the outlet pipe 3 of the drain 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, 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.

[0026] Example 2, reference Figure 5-Figure 6 , Fig. 9 as well as Fig.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.

[0027] 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 slidably installed inside the plurality of transformer sleeves 15, a plurality of fixed plates 17 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.

[0028] Specifically, the interior of multiple transformer sleeves 15 is filled with hydraulic oil. The function of the sealing element is: when the staff installs the matching ring 28 in the connecting groove, the sealing element can close the gap between the delivery pipe 27 and the sliding cylinder 13 to ensure 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 the internal mounting groove thereof 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 pressure-changing sleeve 15, therefore, in the process that the pressure-changing sleeve 15 moves inwardly with the sliding cylinder 13 in the horizontal direction, the piston plate 16 will slide relatively in the opposite direction along the pressure-changing sleeve 15, so that when the piston plate 16 moves in the opposite direction, the hydraulic oil inside the pressure-changing sleeve 15 is pressed into the corresponding expansion rubber ring 19 through the connecting pipe 20. When the internal hydraulic oil of the pressure-changing 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 to ensure 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), so that the delivery pipe 27 can be quickly installed on the inlet pipe 2 and the outlet pipe 3 while ensuring the sealing of the two.

[0029] 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 rotating cylinder 9 rotates through the mutual cooperation of the spiral groove 12 and the convex 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 limitation 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, and 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, so that the expansion rubber ring 19 expands, and 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 will fill the gap between the two, thereby ensuring the sealing between the delivery pipe 27 and the sliding cylinder 13, thereby indirectly ensuring the sealing between the delivery pipe 27 and the inlet pipe 2 and the outlet pipe 3, and ensuring the normal operation of the drain pump.

[0030] The remaining structures are the same as those of Example 1.

[0031] Example 3, reference Figure 2-Figure 3 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that the release component includes a connecting block 25 fixedly installed between the pump body 1 and the carrier plate 22, a control button 26 installed on the side wall of the connecting block 25, and a spring block (not shown in the figure) slidably installed in the two positioning holes 24. A password box (not shown in the figure) is fixedly installed on the side wall of the connecting block 25, and the control button 26 is located inside the password box.

[0032] 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, a 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 matching ring 28 to rotate synchronously and reset under the torsional force of the torsion spring 7, and then the matching 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 the operation be performed by opening the password box and pressing the control button 26.

[0033] 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, and the popped-out spring block pops out the spring rod 21 inserted in the positioning hole 24, and 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 torsion 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 from the connecting groove, thereby realizing the rapid removal of the delivery pipe 27 from the connecting plate 4.

[0034] The remaining structure is the same as that of Example 2.

[0035] 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 drain 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.

[0036] 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 of the spiral groove 12 and the convex 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 limitation 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, and 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, so that the expansion rubber ring 19 expands, and 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 will fill the gap between the two, so as to ensure the sealing between the delivery pipe 27 and the sliding cylinder 13, and then indirectly ensure the sealing between the delivery pipe 27 and the inlet pipe 2 and the outlet pipe 3, so as to ensure the normal operation of the drain pump.

[0037] 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, and 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 torsion 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 from the connecting groove, so as to quickly remove the delivery pipe 27 from the connecting plate 4.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 disassembly and assembly low-pressure heater drain pump for a nuclear power plant, comprising a pump body (1) and an external pipe member, an inlet pipe (2) and an outlet pipe (3) arranged on the pump body (1), characterized in that: It also includes a disassembly unit respectively arranged on the inlet pipe (2) and the outlet pipe (3), the disassembly unit comprising a connecting component respectively arranged on the end of the inlet pipe (2) and the outlet pipe (3) away from the pump body (1) and a releasing component arranged on the pump body (1); The connecting component comprises an annular connecting disk (4) respectively arranged on the outer wall of the inlet pipe (2) and the outlet pipe (3), a circumferential connecting groove provided at one end of the connecting disk (4) away from the pump body (1), a trigger ring (5) rotatably arranged in the connecting groove, two control blocks (6) provided on the side wall of the trigger ring (5) away from the pump body (1), a torsion spring (7) provided between the trigger ring (5) and the inner wall of the connecting groove, a semicircular connecting groove provided on the inner ring wall of the connecting disk (4), the connecting groove being connected to the connecting groove, a plurality of synchronous plates (8) provided on the inner wall of the connecting disk (4), a rotating cylinder (9) provided on the side walls of the plurality of synchronous plates (8), the rotating cylinder (9) being located on the inner wall of the connecting disk (4), one end of each of the plurality of synchronous plates (8) passing through the connecting groove and 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 plate (11) provided on the outer wall of the rotating cylinder (9); 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 close to the outer side of the connecting groove.

2. A portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 1, characterized in that: The sliding assembly comprises a spiral groove (12) formed on the inner wall of a rotating cylinder (9), a sliding cylinder (13) slidably arranged on the inner wall of the rotating cylinder (9), and a protruding rod (14) arranged on the side wall of the sliding cylinder (13), wherein the protruding rod (14) is slidably installed in the spiral groove (12), and a sealing element is installed inside the sliding cylinder (13).

3. A portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 2, characterized in that: The sealing element comprises a mounting groove formed in the side wall of the sliding cylinder (13), a plurality of transformer sleeves (15) disposed in the mounting groove, a plurality of piston plates (16) slidably disposed in the plurality of transformer sleeves (15), a plurality of fixing plates (17) disposed on the inner walls of the inlet pipe (2) and the outlet pipe (3), a fixing rod (18) disposed between the plurality of fixing plates (17) and the corresponding piston plates (16), an annular groove formed in the outer wall of the sliding cylinder (13), an expansion rubber ring (19) disposed in the annular groove, and a connecting pipe (20) disposed between the side walls of the plurality of transformer sleeves (15) and the corresponding expansion rubber rings (19).

4. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 1 is characterized by: The limiting assembly comprises a spring rod (21) arranged on the side wall of the limiting plate (11), a supporting plate (22) arranged on the outer wall of the outlet pipe (3), a quarter groove (23) provided on the supporting plate (22) and the side wall of the pump body (1), and a locking hole (24) provided at the end of the quarter groove (23).

5. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 4, characterized in that: One end of the two spring rods (21) is slidably mounted in the corresponding quarter slot (23); the two spring rods (21) are in a compressed state in an initial state; and the end surface shape and size of one end of the two spring rods (21) are slightly smaller than the end surface shape and size of the corresponding locking hole (24).

6. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 4, characterized in that: The release component comprises a connection block (25) arranged between the pump body (1) and the carrier plate (22), a control button (26) arranged on a side wall of the connection block (25), and a spring block arranged in two locking holes (24).

7. A portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 6, characterized in that: A password box is provided on the side wall of the connection block (25), and the control button (26) is located inside the password box.

8. The portable disassembly and assembly low-pressure heater drain pump for a nuclear power plant according to claim 3, characterized in that: The outer pipe member comprises a delivery pipe (27), a matching ring (28) arranged on the outer wall of the delivery pipe (27), a matching block (29) symmetrically arranged on the outer wall of the matching ring (28), and a matching groove (30) provided on the side wall of the matching block (29); the matching block (29) and the connecting groove have the same end surface shape and size; the control block (6) and the matching groove (30) have the same end surface shape and size; the diameter of the delivery pipe (27) is slightly larger than the diameter of the sliding cylinder (13).

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