Sealing system for a straight section of a nuclear power plant

Abstract

The utility model relates to sealing equipment technical field especially relates to a kind of sealing system of nuclear power straight section pipe fitting, comprising: first sealing part and second sealing part, first sealing part includes: first sealing block and first sealing pad, first sealing block is rotatably connected with a nuclear power straight section pipe fitting, first sealing pad is installed in the side of first sealing block away from a nuclear power straight section pipe fitting, second sealing part includes: second sealing block and second sealing pad, second sealing block is rotatably connected with another nuclear power straight section pipe fitting, second sealing pad is installed in the side of second sealing block away from another nuclear power straight section pipe fitting, first sealing pad is inserted into second sealing pad, and air bag is provided on the inner wall of second sealing pad.The utility model can double nuclear power straight section pipe fitting end face and circumferential double sealing by first sealing pad, second sealing pad and air bag, to improve the sealing effect of two nuclear power straight section pipe fittings.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, and in particular to a sealing system for a straight section of pipe in a nuclear power plant. Background Technology

[0002] Straight pipe sections in nuclear power plants are structural components of the piping system. Their core functions are to achieve efficient pipe welding, comprehensive inspection, and overall system safety and reliability. To prevent pipe leaks, ensure system safety, maintain system performance, protect the environment, and adapt to special working conditions, we urgently need a sealing system for straight pipe sections in nuclear power plants to ensure the sealing performance of the entire system.

[0003] Currently, the sealing system for straight sections of nuclear power plant pipes is achieved through gaskets located on the end face of the pipes. However, these gaskets are prone to aging, which can affect the sealing performance of the pipes. Furthermore, the circumferential gap in the seal at the end face of the pipes can further compromise the sealing effect. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a sealing system for straight sections of nuclear power plant pipes. By improving the structure of the sealing system, a dual seal can be achieved on the end face and circumferential direction of the straight sections of nuclear power plant pipes, thereby improving the sealing effect of the two sections of straight sections of nuclear power plant pipes.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A sealing system for a straight section of a nuclear power plant pipe includes a first sealing part and a second sealing part. The first sealing part includes a first sealing block and a first sealing gasket. The first sealing block is rotatably connected to a straight section of a nuclear power plant pipe, and the first sealing gasket is installed on the side of the first sealing block away from the straight section of the nuclear power plant pipe. The second sealing part includes a second sealing block and a second sealing gasket. The second sealing block is rotatably connected to another straight section of a nuclear power plant pipe, and the second sealing gasket is installed on the side of the second sealing block away from the other straight section of the nuclear power plant pipe. The first sealing gasket is inserted into the second sealing gasket, and an air bladder is provided on the inner wall of the second sealing gasket.

[0007] Therefore, through the cooperation of the first and second sealing gaskets, the end faces of the two straight sections of the nuclear power plant pipe can be sealed, and the circumferential seal of the two straight sections of the nuclear power plant pipe can be achieved through the airbag. Compared with the existing sealing method that only uses sealing gaskets, on the one hand, the double sealing of the end faces and circumference of the two straight sections of the nuclear power plant pipe ensures that there are no gaps in the end faces and circumference of the two straight sections of the nuclear power plant pipe, thereby improving the sealing effect of the two straight sections of the nuclear power plant pipe. On the other hand, it can avoid the sealing effect of the two straight sections of the nuclear power plant pipe from being affected when the first and second sealing gaskets are damaged due to aging.

[0008] As a further improvement to the above technical solution: an inflation hole is provided on the outer peripheral surface of the second sealing block, the inflation hole being connected to the airbag, and a sealing plug is installed on the inflation hole, the side of the sealing plug near the airbag being inclined. Thus, when the sealing plug is removed, the airbag can be inflated through the inflation hole to ensure that the airbag is grounded to the first sealing block, thereby achieving circumferential sealing of the two sections of the nuclear power plant's straight pipe section.

[0009] As a further improvement to the above technical solution: a baffle is provided on the outer peripheral surface of the second sealing block, the baffle being rotatably connected to the second sealing block, and the side of the baffle near the sealing plug being inclined. Thus, by rotating the baffle, the sealing plug can be installed and removed relative to the inflation hole, and the inclined surfaces of the sealing plug and the baffle facilitate mutual movement between the baffle and the sealing plug.

[0010] As a further improvement to the above technical solution: a second mounting block is provided on the side of the second sealing block away from the other nuclear power plant straight section pipe fitting. The second mounting block is connected to the second sealing block by bolts, and the second sealing gasket is embedded in the second mounting block. Thus, the bolts allow for the installation and removal of the second mounting block relative to the second sealing block. When the second sealing gasket ages, it can be replaced promptly, thereby not affecting the end-face sealing effect of the two nuclear power plant straight section pipe fittings.

[0011] As a further improvement to the above technical solution: a first mounting block is provided on the side of the first sealing block away from a straight section of the nuclear power plant pipe fitting. The first mounting block is connected to the first sealing block by bolts, and the first sealing gasket is embedded in the first mounting block. Thus, the bolts allow for the installation and removal of the first mounting block relative to the first sealing block. When the first sealing gasket ages, it can be replaced promptly, thereby not affecting the end-face sealing effect of the two straight sections of the nuclear power plant pipe fitting.

[0012] As a further improvement to the above technical solution: a plug-in block is provided on the outer peripheral surface of the first sealing block, and a matching slot is provided on the second sealing block relative to the plug-in block, the plug-in block being adapted to the matching slot. Thus, the mutual cooperation between the plug-in block and the matching slot facilitates the installation of the first and second sealing blocks. Simultaneously, inserting the plug-in block into the matching slot restricts the relative rotation between the first and second sealing parts, thereby restricting the relative rotation between the two straight sections of the nuclear power plant pipe fittings, thus protecting the first sealing gasket, the second sealing gasket, and the airbag, and improving the service life of the first sealing gasket, the second sealing gasket, and the airbag.

[0013] As a further improvement to the above technical solution: the first sealing gasket protrudes from the end face of the first sealing block away from one nuclear power plant straight section pipe fitting, and the second sealing gasket protrudes from the end face of the second sealing block away from the other nuclear power plant straight section pipe fitting. Therefore, during sealing, the first and second sealing blocks can be ensured to press against each other, thereby further improving the sealing effect of the two nuclear power plant straight section pipe fittings.

[0014] As a further improvement to the above technical solution, it also includes a connecting mechanism, which comprises a first connecting block and a second connecting block. The first connecting block is mounted on the outer peripheral surface of the first sealing block, and the second connecting block is mounted on the outer peripheral surface of the second sealing block. The first connecting block and the second connecting block are connected by a locking member. Thus, by tightening and loosening the locking member, the installation and disassembly of the first connecting block and the second connecting block can be achieved, thereby enabling the installation and disassembly of the two sections of straight pipe fittings in the nuclear power plant.

[0015] As a further improvement to the above technical solution: the locking member is threadedly connected to the first connecting block, and the locking member is threadedly connected to the second connecting block.

[0016] As a further improvement to the above technical solution: a limiting groove is formed inside the second connecting block, and a limiting block is fitted on the outer peripheral surface of the locking member, with the limiting block located within the limiting groove. Thus, through the cooperation of the limiting groove and the limiting block, the movement of the locking member can be limited, ensuring that the locking member will not detach from the second connecting block and will not fall off. This facilitates the installation of two sections of straight pipe fittings in nuclear power plants.

[0017] The beneficial effects of this utility model are as follows:

[0018] By cooperating with the first and second sealing gaskets, the end faces of the two straight sections of the nuclear power plant pipe can be sealed. The airbags can achieve circumferential sealing of the two straight sections of the nuclear power plant pipe. Compared with the existing sealing method that only uses sealing gaskets, on the one hand, the double sealing of the end faces and circumference of the two straight sections of the nuclear power plant pipe ensures that there are no gaps in either direction, thus improving the sealing effect. On the other hand, it can prevent the sealing effect of the two straight sections of the nuclear power plant pipe from being affected when the first and second sealing gaskets are damaged due to aging.

[0019] This utility model also has the following advantages:

[0020] 1. When the sealing plug is removed, the airbag can be inflated through the inflation hole to ensure that the airbag is grounded with the first sealing block, so as to achieve circumferential sealing of the two sections of the nuclear power plant straight pipe; the sealing plug can be installed and removed relative to the inflation hole by rotating the baffle, and the inclined surface of the sealing plug and the inclined surface of the baffle can facilitate the mutual movement between the baffle and the sealing plug.

[0021] 2. This utility model enables the installation and removal of the second mounting block relative to the second sealing block, and the installation and removal of the first mounting block relative to the first sealing block, through bolts. When the second sealing gasket ages, it can be replaced in time, thus not affecting the end face sealing effect of the two nuclear power plant straight pipe sections. When the first sealing gasket ages, it can be replaced in time, thus not affecting the end face sealing effect of the two nuclear power plant straight pipe sections.

[0022] 3. This utility model facilitates the installation of the first sealing block and the second sealing block through the mutual cooperation of the plug-in block and the slot. At the same time, inserting the plug-in block into the slot can restrict the relative rotation between the first sealing part and the second sealing part, thereby restricting the relative rotation between the two straight sections of the nuclear power plant pipe, so as to protect the first sealing gasket, the second sealing gasket, and the airbag, and improve the service life of the first sealing gasket, the second sealing gasket, and the airbag. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the sealing system for the straight section pipe fitting in a nuclear power plant according to this utility model;

[0024] Figure 2 This is a first-view exploded view of the sealing system of the straight section pipe fitting in a nuclear power plant according to this utility model;

[0025] Figure 3 This is an exploded view from a second perspective of the sealing system of the straight section pipe fitting in a nuclear power plant according to this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the first sealing part of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the second sealing part of this utility model;

[0028] Figure 6 This is a cross-sectional view of the second sealing part of this utility model;

[0029] Figure 7 For the present utility model Figure 6 Enlarged schematic diagram of a local structure at point A;

[0030] Figure 8 This is a cross-sectional view of the second connecting block of this utility model.

[0031] Among them: 1. First sealing part;

[0032] 101. First sealing block; 102. First sealing gasket; 103. First mounting block; 104. Insertion block;

[0033] 2. Second sealing part;

[0034] 201. Second sealing block; 202. Second sealing gasket; 203. Airbag; 204. Inflation port; 205. Sealing plug; 206. Baffle; 207. Second mounting block; 208. Alignment slot;

[0035] 3. Connecting mechanism;

[0036] 301. First connecting block; 302. Second connecting block; 303. Locking component; 304. Limiting groove; 305. Limiting block. Detailed Implementation

[0037] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0038] like Figures 1 to 8The diagram shows the preferred embodiment of this utility model. The sealing system for a nuclear power plant straight section pipe fitting in this embodiment includes: a first sealing part 1 and a second sealing part 2. The first sealing part 1 includes: a first sealing block 101 and a first sealing gasket 102. The first sealing block 101 is rotatably connected to a nuclear power plant straight section pipe fitting. The first sealing gasket 102 is installed on the side of the first sealing block 101 away from the nuclear power plant straight section pipe fitting. The second sealing part 2 includes: a second sealing block 201 and a second sealing gasket 202. The second sealing block 201 is rotatably connected to another nuclear power plant straight section pipe fitting. The second sealing gasket 202 is installed on the side of the second sealing block 201 away from the other nuclear power plant straight section pipe fitting. The first sealing gasket 102 is inserted into the second sealing gasket 202. An airbag 203 is provided on the inner wall of the second sealing gasket 202. Therefore, through the cooperation of the first sealing gasket 102 and the second sealing gasket 202, the end face sealing of the two nuclear power plant straight pipe sections can be achieved, and the circumferential sealing of the two nuclear power plant straight pipe sections can be achieved through the airbag 203. Compared with the existing sealing method that only uses sealing gaskets, on the one hand, the double sealing of the end face and circumferential direction of the two nuclear power plant straight pipe sections can ensure that there are no gaps in the end face and circumferential direction of the two nuclear power plant straight pipe sections, thereby improving the sealing effect of the two nuclear power plant straight pipe sections. On the other hand, it can avoid the sealing effect of the two nuclear power plant straight pipe sections being affected when the first sealing gasket 102 and the second sealing gasket 202 are damaged due to aging.

[0039] In this embodiment, an inflation hole 204 is provided on the outer peripheral surface of the second sealing block 201. The inflation hole 204 is connected to the airbag 203, and a sealing plug 205 is installed on the inflation hole 204. The side of the sealing plug 205 near the airbag 203 is inclined. A baffle 206 is provided on the outer peripheral surface of the second sealing block 201. The baffle 206 is rotatably connected to the second sealing block 201, and the side of the baffle 206 near the sealing plug 205 is inclined. Thus, when the sealing plug 205 is removed, the airbag 203 can be inflated through the inflation hole 204 to ensure that the airbag 203 is grounded to the first sealing block 101, thereby achieving circumferential sealing of the two sections of the nuclear power plant straight pipe. By rotating the baffle 206, the sealing plug 205 can be installed and removed relative to the inflation hole 204, and the inclined surfaces of the sealing plug 205 and the baffle 206 facilitate mutual movement between the baffle 206 and the sealing plug 205.

[0040] Specifically, in the initial state, the sealing plug 205 is inserted into the inflation hole 204 to ensure that the gas inside the airbag 203 does not leak out, and the airbag 203 is in a convex state, so that it can abut against the outer peripheral surface of the first sealing block 101 to achieve circumferential sealing of the two sections of the nuclear power plant straight pipe fittings; when the airbag 203 needs to be inflated, the sealing plug 205 can be easily removed from the inflation hole 204 by rotating the baffle 206. In addition, it can also ensure that the gas inside the airbag 203 does not leak during the inflation process (that is, when connected to the inflation equipment, the baffle 206 can temporarily block the flow of gas inside and outside the airbag 203, thus ensuring that the gas inside the airbag 203 does not leak).

[0041] In this embodiment, a second mounting block 207 is provided on the side of the second sealing block 201 away from the other nuclear power plant straight section pipe fitting. The second mounting block 207 is connected to the second sealing block 201 by bolts, and the second sealing gasket 202 is embedded in the second mounting block 207. Thus, the second mounting block 207 can be installed and removed relative to the second sealing block 201 by bolts. When the second sealing gasket 202 ages, it can be replaced in time, so as not to affect the end face sealing effect of the two nuclear power plant straight section pipe fittings.

[0042] In this embodiment, a first mounting block 103 is provided on the side of the first sealing block 101 away from a straight section of the nuclear power plant pipe fitting. The first mounting block 103 is connected to the first sealing block 101 by bolts, and the first sealing gasket 102 is embedded in the first mounting block 103. Thus, the first mounting block 103 can be installed and removed relative to the first sealing block 101 by bolts. When the first sealing gasket 102 ages, it can be replaced in time, so as not to affect the end face sealing effect of the two straight sections of the nuclear power plant pipe fitting.

[0043] In this embodiment, a plug-in block 104 is provided on the outer peripheral surface of the first sealing block 101, and a matching slot 208 is provided on the second sealing block 201 at a position opposite to the plug-in block 104. The plug-in block 104 and the matching slot 208 are adapted to each other. Thus, the mutual cooperation between the plug-in block 104 and the matching slot 208 facilitates the installation of the first sealing block 101 and the second sealing block 201. At the same time, inserting the plug-in block 104 into the matching slot 208 can restrict the relative rotation between the first sealing part 1 and the second sealing part 2, thereby restricting the relative rotation between the two straight sections of the nuclear power plant pipe, so as to protect the first sealing gasket 102, the second sealing gasket 202, and the airbag 203, and improve the service life of the first sealing gasket 102, the second sealing gasket 202, and the airbag 203.

[0044] In this embodiment, the first sealing gasket 102 protrudes from the end face of the first sealing block 101 away from one nuclear power plant straight section pipe fitting, and the second sealing gasket 202 protrudes from the end face of the second sealing block 201 away from the other nuclear power plant straight section pipe fitting. Therefore, during sealing, the first sealing block 101 and the second sealing block 201 can be ensured to press against each other, further improving the sealing effect of the two nuclear power plant straight section pipe fittings.

[0045] It should be noted that:

[0046] I. For example Figure 4 As shown, the first sealing gasket 102 protruding from the end face of the first sealing block 101 away from the end face of a straight section of a nuclear power plant pipe means that the end face of the first sealing gasket 102 is not flush with the end face of the first sealing block 101, and the end face of the first sealing gasket 102 is higher than the end face of the first sealing block 101.

[0047] II. Figure 5 As shown, the second sealing gasket 202 protruding from the end face of the second sealing block 201 away from the other nuclear power plant straight section pipe fitting means that the end face of the second sealing gasket 202 is not flush with the end face of the second sealing block 201, and the end face of the second sealing gasket 202 is higher than the end face of the second sealing block 201. In this way, when the two nuclear power plant straight section pipe fittings are used, the first sealing gasket 102 and the second sealing gasket 202 can be squeezed against each other, thus ensuring that there is no gap between the end faces of the two nuclear power plant straight section pipe fittings, thereby further improving the sealing effect of the two nuclear power plant straight section pipe fittings.

[0048] In this embodiment, a connecting mechanism 3 is also included. The connecting mechanism 3 includes a first connecting block 301 and a second connecting block 302. The first connecting block 301 is installed on the outer peripheral surface of the first sealing block 101, and the second connecting block 302 is installed on the outer peripheral surface of the second sealing block 201. The first connecting block 301 and the second connecting block 302 are connected by a locking member 303. The locking member 303 is threadedly connected to the first connecting block 301 and to the second connecting block 302. A limiting groove 304 is formed inside the second connecting block 302, and a limiting block 305 is sleeved on the outer peripheral surface of the locking member 303. The limiting block 305 is located in the limiting groove 304. Therefore, by tightening and loosening the locking member 303, the installation and disassembly of the first connecting block 301 and the second connecting block 302 can be realized, thereby realizing the installation and disassembly of the two sections of nuclear power plant straight pipe fittings; through the mutual cooperation of the limiting groove 304 and the limiting block 305, the movement of the locking member 303 can be limited to ensure that the locking member 303 will not be released from the restraint of the second connecting block 302, so that the locking member 303 will not fall off the second connecting block 302, thus facilitating the installation of the two sections of nuclear power plant straight pipe fittings.

[0049] For example, locking component 303 uses bolts.

[0050] The installation process of the two-section nuclear power plant straight pipe fitting of this utility model is as follows: First, align the plug block 104 with the slot 208 and insert the plug block 104 into the slot 208; finally, tighten the locking member 303 so that the first connecting block 301 and the second connecting block 302 are connected, thus realizing the connection of the two-section nuclear power plant straight pipe fitting. At this time, the first sealing gasket 102 and the second sealing gasket 202 are pressed against each other to form a first layer of seal (i.e., the end face seal of the two-section nuclear power plant straight pipe fitting). The airbag 203 is grounded with the outer wall of the first sealing block 101 to form a second layer of seal (i.e., the circumferential seal of the two-section nuclear power plant straight pipe fitting). The double seal of the end face and circumferential direction of the two-section nuclear power plant straight pipe fitting can ensure that there are no gaps in the end face and circumferential direction of the two-section nuclear power plant straight pipe fitting, thereby improving the sealing effect of the two-section nuclear power plant straight pipe fitting.

[0051] In summary, this utility model, through the cooperation of the first sealing gasket 102 and the second sealing gasket 202, can achieve end face sealing of two sections of straight nuclear power plant pipe fittings, and through the airbag 203, can achieve circumferential sealing of the two sections of straight nuclear power plant pipe fittings. Compared with the existing sealing method that only uses sealing gaskets, on the one hand, the double sealing of the end face and circumference of the two sections of straight nuclear power plant pipe fittings can ensure that there are no gaps in the end face and circumference of the two sections of straight nuclear power plant pipe fittings, thereby improving the sealing effect of the two sections of straight nuclear power plant pipe fittings. On the other hand, it can avoid the sealing effect of the two sections of straight nuclear power plant pipe fittings being affected when the first sealing gasket 102 and the second sealing gasket 202 are damaged due to aging.

[0052] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A sealing system for a nuclear power plant with a straight section of tubing, characterized in that, include: A first sealing part (1) includes: A first sealing block (101) and a first sealing gasket (102), wherein the first sealing block (101) is rotatably connected to a nuclear power plant straight section pipe fitting, and the first sealing gasket (102) is installed on the side of the first sealing block (101) away from the nuclear power plant straight section pipe fitting; The second sealing part (2) includes: The second sealing block (201) and the second sealing gasket (202) are rotatably connected to another nuclear power plant straight section pipe fitting. The second sealing gasket (202) is installed on the side of the second sealing block (201) away from the other nuclear power plant straight section pipe fitting. The first sealing gasket (102) is inserted into the second sealing gasket (202). An airbag (203) is provided on the inner wall of the second sealing gasket (202).

2. The sealing system for straight sections of pipe in nuclear power plants as described in claim 1, characterized in that: The second sealing block (201) has an inflation hole (204) on its outer peripheral surface. The inflation hole (204) is connected to the airbag (203). A sealing plug (205) is installed on the inflation hole (204). The side of the sealing plug (205) near the airbag (203) is inclined.

3. The sealing system for straight sections of pipe in nuclear power plants as described in claim 2, characterized in that: The outer peripheral surface of the second sealing block (201) is provided with a baffle (206), the baffle (206) is rotatably connected to the second sealing block (201), and the side of the baffle (206) near the sealing plug (205) is inclined.

4. The sealing system for straight sections of pipe in nuclear power plants as described in claim 1, characterized in that: A second mounting block (207) is provided on the side of the second sealing block (201) away from the other nuclear power plant straight section pipe fitting. The second mounting block (207) is connected to the second sealing block (201) by bolts, and the second sealing gasket (202) is embedded in the second mounting block (207).

5. The sealing system for straight sections of pipe in nuclear power plants as described in claim 1, characterized in that: A first mounting block (103) is provided on the side of the first sealing block (101) away from a straight section of a nuclear power plant pipe. The first mounting block (103) is connected to the first sealing block (101) by bolts, and the first sealing gasket (102) is embedded in the first mounting block (103).

6. The sealing system for straight sections of pipe in nuclear power plants as described in claim 1, characterized in that: The outer peripheral surface of the first sealing block (101) is provided with a plug-in block (104), and the second sealing block (201) is provided with a matching slot (208) at a position relative to the plug-in block (104), and the plug-in block (104) is adapted to the matching slot (208).

7. The sealing system for straight sections of pipe in nuclear power plants as described in claim 1, characterized in that: The first sealing gasket (102) protrudes from the first sealing block (101) away from the end face of a straight section of a nuclear power plant pipe fitting, and the second sealing gasket (202) protrudes from the second sealing block (201) away from the end face of another straight section of a nuclear power plant pipe fitting.

8. The sealing system for straight sections of pipe in a nuclear power plant as described in claim 1, characterized in that: Also includes: The connecting mechanism (3) includes: A first connecting block (301) and a second connecting block (302) are provided. The first connecting block (301) is installed on the outer peripheral surface of the first sealing block (101), and the second connecting block (302) is installed on the outer peripheral surface of the second sealing block (201). The first connecting block (301) and the second connecting block (302) are connected by a locking member (303).

9. The sealing system for straight sections of pipe in a nuclear power plant as described in claim 8, characterized in that: The locking member (303) is threadedly connected to the first connecting block (301), and the locking member (303) is threadedly connected to the second connecting block (302).

10. The sealing system for straight sections of pipe in a nuclear power plant as described in claim 8, characterized in that: The second connecting block (302) has a limiting groove (304) inside, and the locking member (303) has a limiting block (305) sleeved on its outer peripheral surface, and the limiting block (305) is located in the limiting groove (304).

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