Pipeline plugging device

Abstract

The pipeline plugging device comprises a plugging piece and a supporting piece, the plugging piece is provided with a first side face and a second side face which are arranged back to back, and the first side face is used for being attached to the end face of a pipeline opening and covering the opening in a matched mode; the supporting piece is provided with a supporting end abutting against the second side face, and the supporting end abuts against the plugging piece so that the first side face can abut against the end face of the opening in a sealed mode. The supporting piece can provide supporting force for the plugging piece from the side, away from the opening, of the plugging piece, so that the first side face of the plugging piece can be attached to and abut against the pipeline, the probability that flushing water flows into the pipeline through the opening is reduced, and the probability that the flushing water flows into a unit loop is reduced; due to the fact that the plugging piece is matched with the supporting piece, the pipeline opening can be plugged, and the probability that flushing water flows into the pipeline is reduced, in the flushing operation process, the heater does not need to be detached from a unit loop, the detaching workload can be reduced, and the flushing operation efficiency can be improved.

Description

Technical Field

[0001] The present application belongs to the field of plugging parts, and more specifically, relates to a pipeline plugging device. Background Art

[0002] Heaters are widely used in power plants. The function of the heater is to use the steam that has done some work in the steam turbine to heat the feed water in the heater, thereby increasing the water temperature, reducing the amount of steam discharged from the turbine to the condenser, reducing energy loss, and improving the cycle efficiency of the thermal system. At present, the structure of the heater is mostly vertical tube plate type; the heating surface of the heater is generally composed of a U-shaped tube bundle made of metal. The U-shaped tube bundle contains multiple U-shaped tubes. The heater usually contains an inlet water chamber and an outlet water chamber. The two ends of the U-shaped tube are connected to the inlet water chamber and the outlet water chamber respectively. The heated water flows into the U-shaped tube bundle through the inlet water chamber. The U-shaped tube absorbs the heat of the heated steam in the steam space of the heater, and transfers the heat to the water flowing in the tube through the tube wall. The heated water flows out through the outlet water chamber of the heater.

[0003] After long-term use, scale will appear on the inner wall of the U-tube of the heater, and the heater needs to be manually flushed and repaired. During the flushing and repair process, the entire unit circuit needs to be suspended and the heater needs to be removed from the unit circuit to cut off the connection between the heater and the unit circuit, so as to prevent the flushing water from entering the unit circuit and contaminating the equipment in the unit circuit. After the flushing is completed, the heater and the unit circuit are reconnected. This method has a cumbersome disassembly process and high work intensity, resulting in a long flushing and repair time, which affects the power generation progress of the unit circuit. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a pipeline plugging device to solve the technical problem in the prior art that when flushing and repairing the heater, the heater needs to be disassembled from the unit circuit, which results in a long disassembly time and affects the power generation progress of the unit circuit.

[0005] To achieve the above objectives, the technical solution adopted in this application is:

[0006] Provided is a pipeline plugging device, comprising:

[0007] The blocking member has a first side surface and a second side surface disposed opposite to each other, wherein the first side surface is adapted to be in contact with an end surface of the pipe opening and to cover the opening;

[0008] The support member has a support end abutting against the second side surface, and the support end pushes the blocking member to make the first side surface sealably abut against the end surface of the opening.

[0009] Optionally, the blocking member is provided with a first positioning groove recessed from the second side surface, and the supporting end is inserted into the first positioning groove.

[0010] Optionally, the blocking member has a protrusion protruding from the second side surface, the protrusion is provided with a first positioning groove, and the supporting end is inserted into the first positioning groove.

[0011] Optionally, the pipeline sealing device further includes a first sealing ring, which is used to be clamped between the first side surface and the end surface of the opening to seal the opening.

[0012] Optionally, the blocking member has a second positioning groove recessed from the first side surface, and a portion of the first sealing ring is located in the second positioning groove.

[0013] Optionally, the blocking member further includes a limiting plate protruding from the first side surface, and the inner side surface of the limiting plate is used to fit with the outer side surface of the pipe.

[0014] Optionally, the limiting plate is an annular wall arranged on the edge of the first side surface, and the pipeline sealing device also includes a second sealing ring arranged on the annular wall, and the second sealing ring is used to be clamped between the annular wall and the outer side surface of the pipeline to seal the gap between the annular wall and the outer side surface of the pipeline.

[0015] Optionally, the annular surrounding wall is provided with a third positioning groove, and a portion of the second sealing ring is located in the third positioning groove.

[0016] Optionally, the blocking member is formed by splicing at least two splicing plates, two adjacent splicing plates are detachably connected, and surfaces of the splicing plates are spliced to form the first side surface.

[0017] Optionally, a sealing gasket is sandwiched between two adjacent splicing plates.

[0018] Optionally, the pipeline sealing device includes two sealing members arranged at intervals, and the support member has two support ends, which are respectively abutted against the two sealing members so that the first side surfaces of the two sealing members abut against the end faces of two different openings.

[0019] Optionally, the support member is a telescopic rod.

[0020] Optionally, the support member further includes a connecting portion and two rod portions movably connected to the connecting portion, wherein one of the rod portions is arranged between the connecting portion and one of the sealing members, and the other of the rod portions is arranged between the connecting portion and the other of the sealing members, one end of the rod portion is connected to the connecting portion, and the other opposite end of the rod portion forms the supporting end.

[0021] Optionally, the pipe sealing device also includes a support plate, which is provided with a first connecting hole. The support member passes through the first connecting hole, and the hole wall of the first connecting hole abuts against the support member. The support plate is used to be connected to the partition in the heater and seal the second connecting hole provided on the partition.

[0022] The beneficial effect of the pipe sealing device provided by the present application is that: by setting a sealing member and a support member for use in conjunction with each other, the support member is pressed against the second side of the sealing member, so that the support member can provide supporting force to the sealing member from the side of the sealing member away from the opening, so that the first side of the sealing member can be kept in close contact with the end face of the opening, thereby reducing the probability of flushing water flowing into the pipe through the opening, thereby reducing the probability of flushing water flowing into the unit circuit; since the cooperation between the sealing member and the support member can achieve the sealing of the pipe opening and reduce the probability of flushing water flowing into the pipe, therefore, during the flushing operation, there is no need to remove the heater from the unit circuit, and the heater and the unit circuit can be kept connected, which can reduce the amount of disassembly work and improve the efficiency of the flushing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic diagram of the assembly structure of a pipeline plugging device and a heater provided in one embodiment of the present application;

[0025] Figure 2 A schematic diagram of an assembly structure of a pipeline plugging device and a heater provided in another embodiment of the present application;

[0026] Figure 3 for Figure 2 The structural schematic diagram of the pipeline plugging device shown;

[0027] Figure 4 for Figure 3 A in the middle is an enlarged schematic diagram;

[0028] Figure 5 A schematic structural diagram of the sealing member provided in an embodiment of the present application.

[0029] Among them, the reference numerals in the figures are:

[0030] 100, heater; 101, outlet water chamber; 102, inlet water chamber; 200, pipe; 201, opening; 300, partition; 301, second communication hole; 400, housing; 500, flushing connection pipe;

[0031] 1. Sealing member; 11. Splicing plate; 111. Connecting plate; 112. Mounting hole; 12. First side surface; 13. Second side surface; 14. Protrusion; 141. First positioning groove; 15. Second positioning groove; 16. Third positioning groove; 17. Annular wall; 2. Support member; 21. Rod; 211. Support end; 212. Connecting end; 22. Connecting portion; 221. Threaded hole; 3. First sealing ring; 4. Second sealing ring; 5. Sealing gasket; 6. Support plate. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following Figure 1 To the attached Figure 5 It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] Heaters are widely used in power plants. The function of the heater is to use the steam that has done some work in the steam turbine to heat the feed water in the heater, thereby increasing the water temperature, reducing the amount of steam discharged from the turbine to the condenser, reducing energy loss, and improving the cycle efficiency of the thermal system. At present, the structure of the heater is mostly vertical tube plate type; the heating surface of the heater is generally composed of a U-shaped tube bundle made of metal. The U-shaped tube bundle contains multiple U-shaped tubes. The heater usually contains an inlet water chamber and an outlet water chamber. The two ends of the U-shaped tube are connected to the inlet water chamber and the outlet water chamber respectively. The heated water flows into the U-shaped tube bundle through the inlet water chamber. The U-shaped tube absorbs the heat of the heated steam in the steam space of the heater, and transfers the heat to the water flowing in the tube through the tube wall. The heated water flows out through the outlet water chamber of the heater.

[0037] After long-term use, scale will appear on the inner wall of the U-tube of the heater, and the heater needs to be manually flushed and repaired. During the flushing and repair process, the entire unit circuit needs to be suspended and the heater needs to be removed from the unit circuit to cut off the connection between the heater and the unit circuit, so as to prevent the flushing water from entering the unit circuit and contaminating the equipment in the unit circuit. After the flushing is completed, the heater and the unit circuit are reconnected. This method has a cumbersome disassembly process and high work intensity, resulting in a long flushing and repair time, which affects the power generation progress of the unit circuit.

[0038] Based on this, an embodiment of the present application provides a pipeline blocking device to solve the above-mentioned problem.

[0039] Please also refer to Figures 1 to 3 , the pipeline blocking device provided in the embodiment of the present application is now described.

[0040] The pipe plugging device provided in the embodiment of the present application is applied to the heater 100, which is applied to the unit circuit of the power plant. The heater 100 has a U-shaped tube, an outlet water chamber 101, an inlet water chamber 102 and a partition 300. The two ends of the U-shaped tube are respectively connected to the inlet water chamber 102 and the outlet water chamber 101. The partition 300 separates the inlet water chamber 102 from the outlet water chamber 101 so that all the feed water in the inlet water chamber 102 can flow into the U-shaped tube of the heater 100 to achieve heating and temperature rise. The outlet water chamber 101 and the inlet water chamber 102 are both provided with pipes 200, and one end of the two pipes 200 located in the heater 100 is provided with an opening. Opening 201, one end of the pipe 200 located outside the heater 100 is connected to the unit circuit so that the water supply in the unit circuit flows into the inlet water chamber 102 of the heater 100 through the pipe 200 and the opening 201 on the pipe 200, or the water supply in the outlet water chamber 101 of the heater 100 flows into the pipe 200 through the opening 201 of the pipe 200 and flows back into the unit circuit; the pipe 200 is the structure connecting the heater 100 and the unit circuit. Blocking the opening 201 of the pipe 200 can cut off the liquid flow path between the heater 100 and the unit circuit, thereby reducing the possibility of the flushing water flowing into the unit circuit through the pipe 200 during the flushing process.

[0041] During the flushing process, the two flushing connecting pipes 500 connected to the flushing machine are respectively connected to the outlet water chamber 101 and the inlet water chamber 102 of the heater 100. The flushing water flows into the inlet water chamber 102 of the heater 100 through one of the flushing connecting pipes 500, flows through the U-shaped pipe and the outlet water chamber 101, and then flows out of the heater 100 through the other flushing connecting pipe 500.

[0042] The pipe blocking device in the embodiment of the present application can be used to block the opening 201 of the pipe 200 in the heater 100 to reduce the possibility of flushing water flowing into the unit circuit through the pipe 200 during the flushing process.

[0043] The pipeline sealing device of an embodiment of the present application includes a sealing member 1 and a support member 2. The sealing member 1 has a first side surface 12 and a second side surface 13 arranged back to back, wherein the first side surface 12 is used to fit with the end face of the opening 201 of the pipeline 200 and adapt to cover the opening 201. The support member 2 has a support end 211 abutting against the second side surface 13. The support end 211 pushes the sealing member 1 to make the first side surface 12 abut against the end face of the opening 201.

[0044] It should be noted that the support end 211 pushes the blocking member 1, which means that the support end 211 is in contact with the blocking member 1 and has a tendency to push the blocking member 1 toward the side of the opening 201, so that the first side surface 12 of the blocking member 1 can interact with the end face of the opening 201 and be pressed tightly.

[0045] By setting up a sealing member 1 and a support member 2 for use in conjunction with each other, the support member 2 pushes against the second side surface 13 of the sealing member 1. In this way, the support member 2 can provide supporting force to the sealing member 1 from the side of the sealing member 1 away from the opening 201, so that the first side surface 12 of the sealing member 1 can be kept in contact with the end face of the opening 201, thereby reducing the probability of flushing water flowing into the pipe 200 through the opening 201, thereby reducing the probability of flushing water flowing into the unit circuit and reducing the contamination of the unit circuit by the flushing water; since the cooperation between the sealing member 1 and the support member 2 can achieve the blocking of the opening 201 of the pipe 200 and reduce the probability of flushing water flowing into the pipe 200, during the flushing operation, there is no need to remove the heater 100 from the unit circuit and keep the heater 100 connected to the unit circuit, which can reduce the amount of disassembly work and improve the efficiency of the flushing operation. During the flushing operation, since there is water in the heater 100 and no water in the pipe 200, there is a pressure difference on both sides of the sealing member 1, and the pressure on the side of the sealing member 1 facing the heater 100 is greater than the pressure on the side of the sealing member 1 facing the pipe 200. In this way, the pressure generated by the flushing water flow inside the heater 100 can also provide support for the sealing member 1, so that the sealing member 1 can further press against the end face of the opening 201 to achieve sealing of the opening 201.

[0046] Reference Figure 1 In some embodiments, the supporting end 211 of the support member 2 is pressed against the sealing member 1, and the end of the support member 2 away from the supporting end 211 is pressed against the partition 300 of the heater 100. In this way, the partition 300 in the heater 100 can provide supporting force for the sealing member 1 through the support member 2, that is, the pushing force of the support member 2 on the sealing member 1 comes from the partition 300.

[0047] Reference Figure 2 In some embodiments, a pipe sealing device is applied to a heater 100, and two pipes 200 are provided in the heater 100, and the openings 201 of the two pipes 200 are arranged facing each other. The pipe sealing device includes two spaced sealing members 1, and the support member 2 has two supporting ends 211. The two supporting ends 211 are respectively pressed against the two sealing members 1, that is, the two ends of the support member 2 are respectively pressed against the two sealing members 1, so that the first side surfaces 12 of the two sealing members 1 are pressed against the end surfaces of two different openings 201; the two sealing members 1 can provide supporting force to each other through the support member 2 (that is, the pushing force of the support member 2 on the sealing member 1). In this way, after the flushing operation is completed, when the support member 2 is removed, the two sealing members 1 can be removed at the same time, which can improve the efficiency of the operation.

[0048] In this embodiment, the two pipes 200 in the heater 100 are arranged in a vertical direction. Figure 1 and Figure 2The vertical direction shown is the vertical direction in actual operation, that is, the length of the support member 2 extends along the vertical direction. In this way, the friction caused by gravity between the sealing member 1 and the pipeline 200 can be reduced, and the possibility of displacement between the sealing member 1 and the pipeline 200 during use can be reduced.

[0049] In some embodiments, the support member 2 is rod-shaped.

[0050] Reference Figure 2 The support member 2 is a telescopic rod. By configuring the support member 2 as a telescopic rod, the length of the support member 2 can be adjusted according to the actual space size inside the heater 100, so that both support ends 211 of the support member 2 can maintain a tight contact with the blocking member 1. On the one hand, this ensures the stability of the blocking of the opening 201 of the pipeline 200, and on the other hand, it improves the versatility of the support member 2, allowing the support member 2 to be used in heaters 100 of different sizes.

[0051] Reference Figure 2 and Figure 3 The support member 2 includes a connecting portion 22 and two rods 21 movably connected to the connecting portion 22. One rod 21 is disposed between the connecting portion 22 and one of the blocking members 1, and the other rod 21 is disposed between the connecting portion 22 and another of the blocking members 1. One end of the rod 21 is connected to the connecting portion 22, and the other end of the rod 21 forms a support end 211. By arranging the connecting portion 22 and the rod 21 to be movably connected, the length of the support member 2 can be adjusted by adjusting the relative position of the connecting portion 22 and the rod 21.

[0052] In this embodiment, the connecting portion 22 and the rod portion 21 are independent components. The two ends of the rod portion 21 are respectively a support end 211 and a connecting end 212. The connecting portion 22 is provided with a threaded hole 221, and the connecting end 212 is threadedly connected to the threaded hole 221. By providing a threaded connection between the connecting portion 22 and the rod portion 21, the connection stability between the connecting portion 22 and the rod portion 21 can be ensured, and the relative distance between the supporting ends 211 of the two rod portions 21 can be adjusted by screwing the connecting end 212 to the depth of the threaded hole 221, thereby adjusting the length of the support member 2.

[0053] Reference Figure 3 In this embodiment, the connecting portion 22 is cylindrical and is provided with a threaded hole 221. Both ends of the threaded hole 221 pass through the connecting portion 22. The connecting ends 212 of the two rods 21 constituting the same support member 2 are screwed into the threaded hole 221 from both ends. Of course, in other embodiments, the connecting portion 22 may be provided with two threaded holes 221, and the connecting ends 212 of the two rods 21 constituting the same support member 2 are screwed into different threaded holes 221.

[0054] In other embodiments, other forms can be used to implement the telescopic function of the support member 2. For example, the support member 2 may include two connecting rods, wherein a buckle is provided on the periphery of one end of one connecting rod, and a socket is provided at the end of the other connecting rod. The hole wall of the socket is provided with multiple buckling positions, and the multiple buckling positions are arranged at intervals along the length direction of the connecting rod. The end of the connecting rod with the buckle is inserted into the socket, and the buckle is inserted into the buckle position of the corresponding position. In this embodiment, the length of the support member 2 can be adjusted by controlling the buckle to be inserted into different buckle positions.

[0055] Reference Figure 2 The heater 100 is provided with a partition 300, which is located between the two pipes 200. The partition 300 is provided with a second communication hole 301. The pipe plugging device further includes a support plate 6, which is provided with a first communication hole. The support member 2 passes through the first communication hole, and the hole wall of the first communication hole abuts against the support member 2. The support plate 6 is used to connect with the partition 300 in the heater 100 and plug the second communication hole 301 provided on the partition 300. By providing the first communication hole on the support plate 6 and passing the support member 2 through the first communication hole, the support plate 6 can provide horizontal support and limit the support member 2. On the one hand, this can reduce the bending of the support member 2, and on the other hand, it can reduce the horizontal position deviation of the support member 2, thereby reducing the risk of separation between the support member 2 and the plugging member 1 during use.

[0056] In some embodiments, the support plate 6 and the partition plate 300 may be connected by bolts and nuts.

[0057] Reference Figure 3 and Figure 4 The blocking member 1 is provided with a first positioning groove 141 recessed from the second side surface 13, and the support end 211 is inserted into the first positioning groove 141. The provision of the first positioning groove 141 can form a contact limit for the support end 211. For example, the sidewalls of the first positioning groove 141 can be tightly pressed against the side surfaces of the support end 211, thereby reducing the probability of the support end 211 slipping on the second side surface 13 and ensuring that the support end 211 can always be pressed against the blocking member 1.

[0058] In some embodiments, the blocking member 1 may be provided with multiple first positioning grooves 141 to provide support space for multiple support members 2. For example, the multiple first positioning grooves 141 may be arranged in a ring around the central axis of the blocking member 1, and the first positioning grooves 141 may be adjacent to the edge area of the second side surface 13.

[0059] The plugging member 1 has a protrusion 14 protruding from the second side surface 13. The protrusion 14 is provided with a first positioning groove 141, and the support end 211 is inserted into the first positioning groove 141. By providing the protrusion 14 on the plugging member 1, the local thickness of the plugging member 1 can be increased. On the one hand, this can facilitate the formation of the first positioning groove 141. On the other hand, it can appropriately reduce the overall thickness of the plugging member 1. This can reduce the weight of the plugging member 1 and facilitate the assembly of the plugging member 1 and the support member 2 to seal the opening 201 of the pipe 200.

[0060] Reference Figure 5 A protrusion 14 can be provided corresponding to each first positioning groove 141, that is, the number of protrusions 14 and the number of first positioning grooves 141 correspond one to one, or a plurality of first positioning grooves 141 can be provided on one protrusion 14, that is, the number of protrusions 14 is less than the number of first positioning grooves 141. In this way, the amount of processing on the side of the protrusion 14 can be reduced, which helps to improve the efficiency of the operation during the processing and production of the sealing member 1.

[0061] Reference Figure 4 The pipe plugging device further includes a first sealing ring 3, which is sandwiched between the first side surface 12 of the plugging member 1 and the end surface of the opening 201. By disposing the first sealing ring 3 between the plugging member 1 and the end surface of the opening 201, the first sealing ring 3 can fill the gap between the plugging member 1 and the end surface of the opening 201 through its own deformation, thereby improving the airtightness of the pipe plugging device. In this way, even if the end surface of the plugging member 1 or the opening 201 is rough, the probability of flushing water entering the pipe 200 can still be reduced.

[0062] It should be noted that the first sealing ring 3 is clamped between the first side surface 12 of the sealing member 1 and the end face of the opening 201, which means that both sides of the first sealing ring 3 are simultaneously subjected to the forces of the first side surface 12 and the end face of the opening 201 and are clamped between the first side surface 12 and the end face of the opening 201.

[0063] In some embodiments, the blocking member 1 has a second positioning groove 15 recessed from the first side surface 12, and a portion of the first sealing ring 3 is located in the second positioning groove 15. The second positioning groove 15 can provide a mounting position for the first sealing ring 3, thereby reducing the possibility of positional displacement of the first sealing ring 3.

[0064] In some embodiments, the cross-sectional shape of the second positioning groove 15 is rectangular, and the cross-sectional shape of the first sealing ring 3 is circular. Then, there will be a gap between the inner wall of the second positioning groove 15 and the first sealing ring 3. This gap can provide a certain deformation accommodating space for the first sealing ring 3. If the local thickness of the first sealing ring 3 is too large, the first sealing ring 3 can fill the gap under the joint extrusion of the first side surface 12 and the end face of the opening 201, thereby reducing the processing accuracy of the first sealing ring 3.

[0065] In this embodiment, two first sealing rings 3 are provided corresponding to each blocking member 1 , and therefore, two second positioning grooves 15 are provided on the blocking member 1 .

[0066] Reference Figure 4 The blocking member 1 further includes a stopper plate protruding from the first side surface 12, the inner side of which is adapted to abut against the outer side of the pipe 200. By providing the stopper plate, when the blocking member 1 is properly installed, the inner side of the stopper plate abuts against the outer side of the pipe 200, making it easy to determine the installation status of the blocking member 1 and thereby ensuring that the blocking member 1 can seal the opening 201 of the pipe 200.

[0067] In some embodiments, the limiting plate is an annular surrounding wall 17 provided at the edge of the first side surface 12. The pipeline plugging device further includes a second sealing ring 4 provided on the annular surrounding wall 17. The second sealing ring 4 is configured to be sandwiched between the annular surrounding wall 17 and the outer side surface of the pipeline 200 to seal the gap between the annular surrounding wall 17 and the outer side surface of the pipeline 200. The provision of the annular surrounding wall 17 provides a location for the second sealing ring 4. The second sealing ring 4 can fill the gap between the annular surrounding wall 17 and the outer side surface of the pipeline 200, forming a secondary seal. This can further improve the airtightness of the pipeline plugging device and reduce the probability of flushing water entering the pipeline 200.

[0068] In this embodiment, two second sealing rings 4 are provided corresponding to each blocking member 1 , and therefore, two third positioning grooves 16 are provided correspondingly on the blocking member 1 .

[0069] In some embodiments, a third positioning groove 16 is recessed on the inner side of the annular surrounding wall 17, and a portion of the second sealing ring 4 is located in the third positioning groove 16. The third positioning groove 16 can provide a mounting position for the second sealing ring 4, reducing the possibility of positional deviation of the second sealing ring 4.

[0070] In some embodiments, the cross-sectional shape of the third positioning groove 16 is rectangular, and the cross-sectional shape of the second sealing ring 4 is circular. Then, there will be a gap between the inner wall of the third positioning groove 16 and the second sealing ring 4. This gap can provide a certain deformation accommodating space for the second sealing ring 4. If the local thickness of the second sealing ring 4 is too large, the second sealing ring 4 can fill the gap under the joint extrusion of the annular wall 17 and the outer side surface of the pipe 200, thereby reducing the processing accuracy of the second sealing ring 4.

[0071] In some embodiments, the sealing member 1 is formed by splicing at least two splicing plates 11, and two adjacent splicing plates 11 are detachably connected, and the surfaces of the splicing plates 11 are spliced together to form a first side surface 12. The pipe sealing device provided in the embodiment of the present application is applied to a heater 100, and the housing 400 of the heater 100 is provided with a manhole. The sealing member 1 and the support member 2 of the pipe sealing device can enter the heater 100 through the manhole. Since the sealing member 1 is large in size and weight, and the manhole size is limited, it is difficult for the integrated sealing member 1 to pass through the manhole. A spliced sealing member 1 is provided. During operation, the sealing member 1 can be disassembled into individual splicing plates 11 first, and the individual splicing plates 11 are moved into the heater 100 from the manhole in turn. Then, fasteners are used to splice the splicing plates 11 together to form the sealing member 1 in the heater 100. This can reduce the difficulty of carrying the sealing member 1.

[0072] In this embodiment, the fasteners are bolts and nuts. A connecting plate 111 can be set on the edge of the second side 13 of the splicing plate 11, and a mounting hole 112 is set on the connecting plate 111. Then, the bolts are passed through the mounting holes 112 on the two splicing plates 11 and screwed into the nuts to realize the splicing operation between the splicing plates 11.

[0073] In some embodiments, a sealing gasket 5 is sandwiched between two adjacent splicing plates 11. By disposing the sealing gasket 5 between two adjacent splicing plates 11, the sealing gasket 5 can fill the gap between the two splicing plates 11, thereby improving the airtightness of the pipeline sealing device. In this way, even if the outer surface of the splicing plates 11 is rough, the probability of flushing water entering the pipeline 200 can still be reduced.

[0074] Reference Figure 5 In this embodiment, a circular blocking member 1 is formed by splicing two semicircular splicing plates 11, and each splicing plate 11 is provided with four first positioning grooves 141, that is, each blocking member 1 is provided with eight first positioning grooves 141, and each blocking member 1 requires eight support members 2 for tight support.

[0075] In some embodiments, the material of the sealing gasket 5, the first sealing ring 3 and the second sealing ring 4 can be nitrile rubber or fluororubber. The materials of the sealing gasket 5, the first sealing ring 3 and the second sealing ring 4 can be the same or different, which is not limited in this embodiment.

[0076] In this embodiment, during the flushing operation, the flushing connection pipe 500 of the flushing equipment can also be connected to the water inlet chamber 102 and the water outlet chamber 101 of the heater 100 through the manhole on the shell 400 of the heater 100, referring to Figure 2The manhole on the outer shell 400 is connected with the outlet water chamber 101, and one of the flushing connecting pipes 500 is directly extended into the manhole and connected with the outlet water chamber 101. For the other flushing connecting pipe 500, it is necessary to first set a third connecting hole connected to the inlet water chamber 102 on the partition 300, and then make the flushing connecting pipe 500 extend into the interior of the outlet water chamber 101, and connect and seal the end of the flushing connecting pipe 500 with the partition 300, so that the flushing connecting pipe 500 is connected with the third connecting hole; of course, the flushing connecting pipe 500 can also be made to pass through the third connecting hole and extend into the inlet water chamber 101. At this time, the outer surface of the flushing connecting pipe 500 needs to be sealed with the hole wall of the third connecting hole.

[0077] In this embodiment, the heater 100 is a low-voltage heater. In other embodiments, the heater 100 may also be a high-voltage heater.

[0078] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A pipeline plugging device, characterized in that: include: The blocking member has a first side surface and a second side surface disposed opposite to each other, wherein the first side surface is adapted to be in contact with an end surface of the pipe opening and to cover the opening; The support member has a support end abutting against the second side surface, and the support end pushes the blocking member to make the first side surface sealably abut against the end surface of the opening.

2. The pipeline plugging device according to claim 1, characterized in that: The blocking member is provided with a first positioning groove recessed from the second side surface, and the supporting end is inserted into the first positioning groove.

3. The pipeline plugging device according to claim 1, characterized in that: The blocking member has a protrusion protruding from the second side surface. The protrusion is provided with a first positioning groove, and the supporting end is inserted into the first positioning groove.

4. The pipeline plugging device according to claim 1, characterized in that: The pipeline plugging device further includes a first sealing ring, which is used to be sandwiched between the first side surface and the end surface of the opening to seal the opening.

5. The pipeline plugging device according to claim 4, characterized in that: The blocking member has a second positioning groove recessed from the first side surface, and a portion of the first sealing ring is located in the second positioning groove.

6. The pipeline plugging device according to claim 1, characterized in that: The blocking member further includes a limiting plate protruding from the first side surface, and the inner side surface of the limiting plate is used to fit with the outer side surface of the pipe.

7. The pipeline plugging device according to claim 6, characterized in that: The limiting plate is an annular surrounding wall arranged on the edge of the first side surface. The pipeline sealing device also includes a second sealing ring arranged on the annular surrounding wall. The second sealing ring is used to be clamped between the annular surrounding wall and the outer side surface of the pipeline to seal the gap between the annular surrounding wall and the outer side surface of the pipeline.

8. The pipeline plugging device according to claim 7, characterized in that: The annular surrounding wall is provided with a third positioning groove, and a portion of the second sealing ring is located in the third positioning groove.

9. The pipeline plugging device according to claim 1, characterized in that: The blocking member is formed by splicing at least two splicing plates, two adjacent splicing plates are detachably connected, and the surfaces of the splicing plates are spliced to form the first side surface.

10. The pipeline plugging device according to claim 9, characterized in that: A sealing gasket is sandwiched between two adjacent splicing plates.

11. The pipeline plugging device according to any one of claims 1 to 10, characterized in that: The pipeline plugging device includes two plugging members arranged at intervals, and the support member has two support ends, which respectively abut against the two plugging members so that the first side surfaces of the two plugging members abut against the end surfaces of two different openings.

12. The pipeline plugging device according to claim 11, characterized in that: The supporting member is a telescopic rod.

13. The pipeline plugging device according to claim 12, characterized in that: The support member also includes a connecting portion and two rod portions movably connected to the connecting portion, wherein one of the rod portions is arranged between the connecting portion and one of the sealing members, and the other rod portion is arranged between the connecting portion and the other of the sealing members, one end of the rod portion is connected to the connecting portion, and the other opposite end of the rod portion forms the supporting end.

14. The pipeline plugging device according to claim 11, characterized in that: The pipeline sealing device also includes a support plate, which is provided with a first connecting hole. The support member passes through the first connecting hole, and the hole wall of the first connecting hole abuts against the support member. The support plate is used to be connected to the partition in the heater and seal the second connecting hole provided on the partition.

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