A sealing assembly and hydrotest conduit
Patent Information
- Application Number
- CN202521578987.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-07-28
AI Technical Summary
目前现有的管道密封装置类型，在应对该试验的特殊需求时存在明显不足，常出现密封不严、压力泄漏等问题，严重影响试验结果准确性，不利于堆芯探测器的质量检验以及核能设施的安全运行
[0018]本实用新型将内连接件设置于试验管道本体的安装孔内，在内连接的内径侧设置有第一密封件，在内连接件的外径侧设置有第二密封件，利用第一密封件实现对内连接件和堆芯探测器之间的密封，利用第二密封件实现对内连接件和安装孔之间的密封，同时，利用螺栓对内连接件进行轴向限位，保障水压试验管道在水压试验过程中的密封状态，从而能够将堆芯探测器密封在试验管道本体内部，满足对堆芯探测器水压试验的需求。
Smart Images
Figure CN224906202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing device technology, and in particular to a sealing component and a water pressure test pipeline. Background Technology
[0002] In the nuclear energy field, the reactor core detector is a key device for measuring the neutron flux rate and its axial distribution within the reactor, the coolant outlet temperature of fuel assemblies, and the temperature inside the reactor pressure vessel under accident conditions. Its submerged portion (typically exceeding 10m in length) must withstand a certain pressure during operation, therefore a hydrostatic test is essential in production. This involves applying a specific pressure to the detector using a hydrostatic testing machine and maintaining it statically for a period of time. The pressure drop after stabilization is then observed to verify the reliability of the shell welding quality.
[0003] However, the hydrostatic test of the core detector requires the application of high pressure, and the pressure drop after stabilization must be small. This places extremely high demands on the sealing performance of the test system. Currently available pipe sealing devices are significantly inadequate to meet the special requirements of this test, often resulting in problems such as incomplete sealing and pressure leakage. This seriously affects the accuracy of the test results and is detrimental to the quality inspection of the core detector and the safe operation of nuclear energy facilities.
[0004] Therefore, it is essential to develop a new sealing device suitable for this test. Utility Model Content
[0005] The purpose of this utility model is to provide a sealing component and a hydrostatic test pipeline to solve the problems existing in the prior art. The inner connector is set in the mounting hole of the test pipeline body, and the inner diameter side and outer diameter side of the inner connector are sealed by the first sealing component and the second sealing component respectively, thereby sealing the core detector inside the test pipeline body and meeting the requirements of hydrostatic testing of the core detector.
[0006] To achieve the above objectives, this utility model provides the following solution:
[0007] This utility model provides a sealing assembly, including an inner connector, a first seal, a second seal, and a bolt. The inner connector is disposed within a mounting hole in the test pipe body and has a first axial channel through which a core detector passes. The first seal is disposed between the inner diameter side of the inner connector and the outer diameter side of the core detector. The second seal is disposed between the outer diameter side of the inner connector and the inner diameter side of the mounting hole. The bolt is threaded into the mounting hole and is used to axially limit the inner connector.
[0008] In one embodiment, the device further includes an external connector, wherein the bolt has a second axial channel through which the external connector passes, a first end of the external connector is connected to the inner connector, and a second end of the external connector extends out of the bolt.
[0009] In one embodiment, the outer connector is threaded to the inner connector, and the side of the first seal near the outer connector abuts against the conical surface of the core detector. The outer connector has a hollow structure, and the hollow structure is provided with a first step that axially abuts against the core detector.
[0010] In one embodiment, a washer is further included, the washer being disposed between the end face of the core detector and the first step.
[0011] In one embodiment, a limiting end is provided at the end of the inner connector away from the outer connector. The limiting end is located between the outer diameter side of the core detector and the inner diameter side of the test pipe body, and the side of the first seal away from the outer connector abuts against the limiting end.
[0012] In one embodiment, the cross-section of the limiting end is hexagonal, and a wrench groove is provided in the middle of the outer connector.
[0013] In one embodiment, an auxiliary nut is also included, the second end of which is provided with an external thread for connecting the auxiliary nut, the auxiliary nut being used to form a gripping portion.
[0014] In one embodiment, the mounting hole is provided with a second step, and the inner connector is provided with a third step, the third step abutting against the second step.
[0015] In one embodiment, a pressure ring is also included, which is provided at both axial ends of the second seal, with one pressure ring abutting against the second step and the other pressure ring abutting against the bolt.
[0016] This utility model also provides a water pressure test pipeline, including a test pipeline body and a sealing assembly as described above. The inner connector is disposed in the mounting hole, and the bolt is threadedly connected to the mounting hole. An upper drain connector and a lower drain connector are disposed on the test pipeline body near the mounting hole. The upper drain connector and the lower drain connector are respectively provided with detachable sealing plugs.
[0017] The present invention achieves the following technical advantages over the prior art:
[0018] This invention places an inner connector inside the mounting hole of the test pipe body. A first sealing element is provided on the inner diameter side of the inner connector, and a second sealing element is provided on the outer diameter side of the inner connector. The first sealing element is used to seal between the inner connector and the core detector, and the second sealing element is used to seal between the inner connector and the mounting hole. At the same time, bolts are used to axially limit the inner connector, ensuring the sealing state of the hydrostatic test pipe during the hydrostatic test. This allows the core detector to be sealed inside the test pipe body, meeting the requirements for hydrostatic testing of the core detector. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the water pressure test system in an embodiment of this utility model;
[0021] Figure 2 This is a schematic diagram of the axial cross-section of the sealing assembly in an embodiment of this utility model;
[0022] Figure 3 This is a schematic diagram of the first sealing element in an embodiment of the present utility model;
[0023] Figure 4 This is a schematic diagram of the axial cross-section of the inner connecting member in an embodiment of this utility model;
[0024] Figure 5 for Figure 4 Sectional view of AA;
[0025] Figure 6 This is a schematic diagram of the external connector in an embodiment of the present utility model;
[0026] Figure 7 for Figure 6 BB section view;
[0027] Figure 8 This is a schematic diagram of the axial cross-section of the bolt in an embodiment of this utility model;
[0028] Figure 9 for Figure 8 CC section view;
[0029] Among them, 1. air pump; 2. air hose; 3. water pressure testing machine; 4. water hose; 5. water pressure testing pipeline;
[0030] 51. Auxiliary nut; 52. External connector; 53. Bolt; 54. Washer; 55. Pressure ring; 56. Second seal; 57. First seal; 58. Internal connector; 59. Core detector; 510. Sealing plug; 511. Upper drain connector; 512. Lower drain connector; 513. Test pipe body;
[0031] 521. Wrench groove; 522. First end; 523. Second end;
[0032] 581. Limiting end. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] The purpose of this utility model is to provide a sealing component and a hydrostatic test pipeline to solve the problems existing in the prior art. The inner connector is set in the mounting hole of the test pipeline body, and the inner diameter side and outer diameter side of the inner connector are sealed by the first sealing component and the second sealing component respectively, thereby sealing the core detector inside the test pipeline body and meeting the requirements of hydrostatic testing of the core detector.
[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] like Figures 1-9As shown, this utility model provides a sealing assembly, including an inner connector 58, a first seal 57, a second seal 56, and a bolt 53. The test pipe body 513 has a mounting hole. The core detector 59 enters the internal cavity of the test pipe body 513 through the mounting hole. The inner connector 58 is disposed within the mounting hole and has a first axial channel through which the core detector 59 passes. Thus, the inner connector 58 is located between the core detector 59 and the test pipe body 513, forming a layered structure. The first seal 57 (which may be made of rubber and is flexible) is disposed between the inner diameter side of the inner connector 58 and the outer diameter side of the core detector 59, sealing the inner connector 58 and the core detector 59. The second seal 56 (which may be made of rubber and is flexible) is disposed between the outer diameter side of the inner connector 58 and the inner diameter side of the mounting hole, sealing the inner connector 58 and the mounting hole. Bolt 53 is threaded into the mounting hole. By setting bolt 53, the inner connecting part 58 can be axially limited.
[0037] This invention places the inner connector 58 inside the mounting hole of the test pipe body 513. A first sealing element 57 is provided on the inner diameter side of the inner connector 58, and a second sealing element 56 is provided on the outer diameter side of the inner connector 58. The first sealing element 57 is used to seal the inner connector 58 and the core detector 59, and the second sealing element 56 is used to seal the inner connector 58 and the mounting hole. At the same time, the bolt 53 is used to axially limit the inner connector 58, ensuring the sealing state of the hydrostatic test pipe 5 during the hydrostatic test. This allows the core detector 59 to be sealed inside the test pipe body 513, meeting the requirements of the hydrostatic test of the core detector 59.
[0038] In one implementation, such as Figure 2 , Figure 6 , Figure 8 and Figure 9 As shown, it also includes an external connector 52. A second axial channel for the external connector 52 to pass through is provided in the middle of the bolt 53. The first end 522 of the external connector 52 is connected to the inner connector 58, and the second end 523 of the external connector 52 extends out of the bolt 53. The bolt 53 also has a hexagonal head, facilitating tightening or loosening operations using tools such as wrenches. By providing the external connector 52, the inner connector 58 can be placed inside the mounting hole, and the external connector 52 facilitates the insertion and removal of the inner connector 58.
[0039] In one implementation, such as Figure 2 and Figure 3As shown, the outer connector 52 is threaded to the inner connector 58, and the first seal 57 abuts against the conical surface of the core detector 59 on the side near the outer connector 52. The outer connector 52 has a hollow structure, and the hollow structure is provided with a first step that axially abuts against the core detector 59. Thus, the two ends of the core detector 59 are respectively limited by the first seal 57 and the first step to limit the axial position of the core detector 59 and ensure the stability during the hydrostatic test.
[0040] In one implementation, such as Figure 2 As shown, it also includes a washer 54, which is disposed between the end face of the core detector 59 and the first step. On the one hand, it can prevent the first step from directly squeezing the core detector 59 and causing damage to the core detector 59. On the other hand, it can further play a sealing role.
[0041] In one implementation, such as Figure 2 and Figure 4 As shown, the inner connector 58 has a limiting end 581 at its end furthest from the outer connector 52. The limiting end 581 is located between the outer diameter side of the core detector 59 and the inner diameter side of the test pipe body 513. The side of the first seal 57 furthest from the outer connector 52 abuts against the limiting end 581. When the outer connector 52 axially compresses the core detector 59, the conical surface of the core detector 59 compresses the first seal 57. The first seal 57 is limited by the limiting end 581, allowing it to better fit the inner diameter side of the inner connector 58 and the outer diameter side of the core detector 59 after being compressed and deformed, thereby achieving a better sealing effect.
[0042] In one implementation, such as Figure 4 and Figure 5 As shown, the limiting end 581 has a hexagonal cross-section, which facilitates clamping and fixing with tools such as wrenches. The outer connector 52 has a wrench groove 521 in the middle, which facilitates clamping and fixing with tools such as wrenches. Thus, the inner connector 58 can be fixed by the limiting end 581, and the outer connector 52 can be fixed by the wrench groove 521, so that the two can rotate relative to each other, enabling tightening and loosening operations.
[0043] In one implementation, such as Figure 2 and Figure 6 As shown, it also includes an auxiliary nut 51. The second end 523 of the outer connector 52 is provided with an external thread for connecting the auxiliary nut 51. The auxiliary nut 51 can be installed on the second end 523 or removed from the second end 523. After the auxiliary nut 51 is installed, it can form a gripping part, which is convenient for gripping during disassembly.
[0044] In one implementation, such as Figure 2As shown, the mounting hole of the test pipe body 513 is provided with a second step, which is located on the inner diameter side of the test pipe body 513. The inner connector 58 is provided with a third step, which is located on the outer diameter side of the inner connector 58. The third step can abut against the second step so that the test pipe body 513 can limit the inner connector 58 in the axial direction and limit the maximum depth of the inner connector 58 inserted into the test pipe body 513.
[0045] In one implementation, such as Figure 2 As shown, it also includes a pressure ring 55, which can be made of stainless steel. The pressure ring 55 is provided at both ends of the second seal 56. One pressure ring 55 abuts against the second step of the test pipe body 513, and the other pressure ring 55 abuts against the bolt 53. When the bolt 53 is tightened in the mounting hole, it can squeeze the pressure ring 55. The second seal 56 between the two pressure rings 55 is squeezed and deformed, so that the second seal 56 fits the test pipe body 513 and the inner connector 58 better, further improving the sealing effect.
[0046] Combined again Figures 1-9 As shown, this utility model also provides a water pressure test pipeline, including a test pipeline body 513 and a sealing assembly as described above. An inner connector 58 is disposed within the mounting hole of the test pipeline body 513, and a bolt 53 is threaded into the mounting hole. An upper drain connector 511 and a lower drain connector 512 are disposed on the test pipeline body 513 near the mounting hole. Both the upper drain connector 511 and the lower drain connector 512 are detachably equipped with sealing plugs 510. When the lower drain connector 512 is sealed and the upper drain connector 511 is open, it indicates that the test pipeline body 513 is full of water during water injection by allowing water to flow out through the upper drain connector 511. When the lower drain connector 512 is open, it drains residual water from inside the test pipeline body 513. When both the lower drain connector 512 and the upper drain connector 511 are sealed, it is used for conducting a water pressure test.
[0047] like Figure 1As shown, this utility model provides a hydrostatic testing system utilizing a hydrostatic testing pipeline 5. The hydrostatic testing system includes an air pump 1, an air pipe 2, a hydrostatic testing machine 3, a water hose 4, and the hydrostatic testing pipeline 5. The air pump 1 is connected to one end of the hydrostatic testing machine 3 via the air pipe 2, and the other end of the hydrostatic testing machine 3 is connected to the hydrostatic testing pipeline 5 via the water hose 4. The hydrostatic testing pipeline 5 contains the core detector 59. The water hose 4 can be wrapped with a 304 stainless steel braided layer. Since the water hose 4 also bears considerable pressure during the hydrostatic test, the high-pressure resistant stainless steel braided layer can constrain the deformation of the water hose 4, forming a protection for the water hose 4 and preventing it from cracking or being damaged due to deformation. During the hydrostatic test, the hydrostatic testing machine 3 provides the water pressure. The hydrostatic testing machine 3 is a commonly used device in this field, and its internal structure will not be described in detail here.
[0048] In this example, the specific working principle is as follows:
[0049] Exhaust: Air pump 1 provides pressure to water pressure testing machine 3, pushing the water in water pressure testing machine 3 into test pipe body 513. When water comes out of the upper drain connector 511, tighten the sealing plug 510 to end the exhaust.
[0050] Pressurization: Air pump 1 provides pressure to water pressure testing machine 3, which pressurizes the water in water supply hose 4 and test pipe body 513 of water pressure testing machine 3. Pressurization stops after the set pressure value is reached. Both water hose 4 and test pipe body 513 are under high pressure.
[0051] Pressure relief: After the water pressure test is completed, the water pressure testing machine 3 unloads the pressure, and most of the water in the test pipeline body 513 flows out from the outlet of the water pressure testing machine 3, leaving almost no residual pressure in the test pipeline body 513.
[0052] The working principle of this utility model is as follows:
[0053] During the hydrostatic test, the first sealing member 57 is inserted from the bottom of the core detector 59 until its inclined surface is in contact with the inclined surface of the core detector 59. The inner connecting member 58 is then inserted from the bottom of the core detector 59 until it contacts the first sealing member 57. The washer 54 is placed into the first end 522 of the outer connecting member 52. The inner connecting member 58 and the first end 522 of the outer connecting member 52 are then tightened together by threads. The pressure ring 55, the second sealing member 56, and the pressure ring 55 are then sequentially fitted onto the outer cylindrical surface of the inner connecting member 58, with the inner diameter side of the second sealing member 56 tightly fitted against the outer diameter side of the inner connecting member 58. Then, the assembled core detector 59, inner connector 58, first seal 57, second seal 56, pressure ring 55, washer 54, and outer connector 52 are inserted into the test pipe body 513. The outer diameter side of the second seal 56 is tightly fitted with the inner diameter side of the test pipe body 513. The inner connector 58 and pressure ring 55 are positioned during installation via the second step of the test pipe body 513. Then, the bolt 53 is tightened to the test pipe body 513 using threads. Air is vented from the test pipe body 513 using the air pump 1 and the hydraulic pressure testing machine 3. The sealing plug 510 of the lower drain connector 512 of the test pipe body 513 is tightened. When water flows out from the upper drain connector 511 of the test pipe body 513, the sealing plug 510 of the upper drain connector 511 is tightened. The hydraulic pressure testing machine 3 applies test pressure to the test pipe body 513 and monitors the pressure drop value in the test pipe body 513 after a period of pressure stabilization. After the depressurization is completed, there is almost no residual pressure in the test pipeline body 513. However, to ensure safety, the sealing plug 510 of the upper drain connector 511 of the test pipeline body 513 is loosened first, then the bolt 53 is removed, and the auxiliary nut 51 is tightened to the second end 523 of the external connector 52 through the thread. Holding the auxiliary nut 51, the external connector 52, washer 54, pressure ring 55, second seal 56, first seal 57, internal connector 58 and core detector 59 that are embedded in the test pipeline body 513 are pulled out as a whole. Then, each part is disassembled to complete one hydrostatic test.
[0054] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A sealing assembly, characterized in that, include: An inner connector is provided for installation within a mounting hole in the test pipe body, and the inner connector has a first axial channel through which a core detector passes. A first sealing element is disposed between the inner diameter side of the inner connector and the outer diameter side of the core detector. The second seal is disposed between the outer diameter side of the inner connector and the inner diameter side of the mounting hole; And a bolt, which is threaded into the mounting hole and is used to axially limit the inner connector.
2. The sealing assembly according to claim 1, characterized in that: It also includes an external connector, wherein the bolt has a second axial channel in the middle for the external connector to pass through, the first end of the external connector is connected to the inner connector, and the second end of the external connector extends out of the bolt.
3. The sealing assembly according to claim 2, characterized in that: The external connector is threaded to the internal connector, and the side of the first seal near the external connector abuts against the conical surface of the core detector. The external connector has a hollow structure, and the hollow structure is provided with a first step that axially abuts against the core detector.
4. The sealing assembly according to claim 3, characterized in that: It also includes a gasket disposed between the end face of the core detector and the first step.
5. The sealing assembly according to claim 3, characterized in that: The inner connector is provided with a limiting end at the end away from the outer connector. The limiting end is located between the outer diameter side of the core detector and the inner diameter side of the test pipe body. The side of the first seal away from the outer connector abuts against the limiting end.
6. The sealing assembly according to claim 5, characterized in that: The limiting end has a hexagonal cross-section, and the outer connector has a wrench groove in the middle.
7. The sealing assembly according to claim 2, characterized in that: It also includes an auxiliary nut, the second end of which is provided with an external thread for connecting to the auxiliary nut, the auxiliary nut being used to form a gripping part.
8. The sealing assembly according to claim 1, characterized in that: The mounting hole is provided with a second step, and the inner connector is provided with a third step, the third step abutting against the second step.
9. The sealing assembly according to claim 8, characterized in that: It also includes pressure rings, which are provided at both ends of the second seal in the axial direction. One pressure ring abuts against the second step, and the other pressure ring abuts against the bolt.
10. A water pressure testing pipeline, characterized in that: The test pipe body includes a test pipe body and a sealing assembly as described in any one of claims 1-9. The inner connector is disposed in the mounting hole, the bolt is threadedly connected to the mounting hole, and an upper drain connector and a lower drain connector are disposed on the test pipe body near the mounting hole. The upper drain connector and the lower drain connector are each detachably provided with a sealing plug.