A tool for testing the leakage of a special-shaped interface of a container device

Abstract

The utility model discloses a kind of tool for container equipment special-shaped interface leakage test, belong to pressure vessel detection technical field;The tool includes external blind cover assembly, internal support frame assembly and multiple main pull rods;External blind cover assembly is composed of blind cover body with threaded blind hole and sealing tab type sealing piece with sealing protrusion;Internal support frame assembly is composed of semicircular clamping plate with clamping slot, auxiliary pull rod, main flange and reinforcing rib welded between the two;Multiple main pull rods are evenly distributed in circumference, outer end is connected blind cover, and inner end is locked using nut after passing through main flange;The utility model provides stable support by internal rigid truss, makes external sealing piece even pressure tight pipe end surface using multiple pull rods synchronous tensioning, effectively solve the sealing problem of special-shaped interface with internal obstacle, with the advantages of reliable sealing, balanced stress, good rigidity and convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel and pipeline system testing technology, specifically a tooling for testing leaks at irregular interfaces of container equipment. Background Technology

[0002] In the manufacturing and periodic inspection of pressure vessels, boilers, chemical equipment, etc., leakage testing is a key step in verifying the sealing integrity of their pressure-bearing components. These devices often have some non-standard irregular round pipe interfaces, such as pipe openings with welded internal supports or semi-circular plates. Due to their irregular internal structure and the lack of flanges or threads at the ends, these interfaces cannot be effectively sealed using standard blind flanges or pipe caps.

[0003] In the existing technology, for such interfaces, temporary blind plates are often welded or complex special fixtures are made. Welding can damage the base material of the equipment, and the process is complicated. After disassembly, weld scar treatment and inspection are required, which is costly and inefficient. On the other hand, special fixtures have poor versatility, long manufacturing cycle, and poor economic efficiency.

[0004] Therefore, there is an urgent need for a dedicated leakage test fixture for such irregular interfaces that can provide rigid internal support and uniform external clamping force to solve the problems of poor sealing reliability, inconvenient operation and low versatility. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a tooling for leak testing of irregularly shaped interfaces of container equipment, so as to solve the technical problems of unstable internal support, uneven sealing pressure, and difficulty in installation and alignment of circular pipe interfaces with internal obstacles during leak testing.

[0006] To achieve the above objectives, this utility model provides a tooling for testing leakage at irregular interfaces of container equipment, which includes an external end cap assembly, an internal support frame assembly, and a multi-main tie rod assembly connecting the two.

[0007] The external end cap assembly includes an end cap body and a compression fitting sealing plate; the end cap body is a circular plate, the diameter of the end cap body is larger than the outer diameter of the circular tube to be sealed, and at least two threaded blind holes are evenly distributed circumferentially on the inner end face of the end cap; the compression fitting sealing plate is a circular plate, and the compression fitting sealing plate is fitted onto the outer circumference of the end cap body through an annular positioning groove integrally formed on the outer end face to achieve locking and positioning.

[0008] The internal support frame assembly includes a semi-circular retaining plate, auxiliary tie rods, a main flange, and reinforcing ribs. The semi-circular retaining plate has a groove for engaging the semi-circular plate inside the pipe opening to be sealed. There are two auxiliary tie rods, one end of which is vertically welded to the inner end face of the semi-circular retaining plate. The main flange has main tie rod through holes corresponding to the position and number of threaded blind holes in the cover body, as well as auxiliary tie rod through holes for the two auxiliary tie rods to pass through. Each auxiliary tie rod is welded to the outer end face of the main flange with the aforementioned reinforcing rib.

[0009] The number of main tie rod assemblies is consistent with the number of threaded blind holes. Each set of main tie rod assemblies includes a main tie rod and a main anti-loosening nut. The outer end of each main tie rod is provided with an external thread that mates with the threaded blind hole of the end cap body. The inner end of each main tie rod passes through the corresponding main tie rod through hole on the main flange and is locked by the main anti-loosening nut. The inner end of the auxiliary tie rod passes through the main flange and is locked by the auxiliary nut.

[0010] Furthermore, this utility model provides a tooling for testing leakage at irregular interfaces of container equipment, wherein a high-strength steel wire threaded sleeve is pre-embedded in the threaded blind hole of the cap body.

[0011] Furthermore, this utility model provides a tooling for testing leakage at irregular interfaces of container equipment, wherein the number of main tie rods is three, and they are evenly distributed circumferentially.

[0012] Furthermore, this utility model provides a tooling for leak testing of irregular interfaces of container equipment, wherein the reinforcing rib is a right-angled triangular steel plate, one right-angled side of which is fully welded to the auxiliary tie rod, and the other right-angled side is fully welded to the outer end face of the main flange.

[0013] Furthermore, the present invention provides a tooling for testing leakage at irregular interfaces of container equipment, wherein both the main anti-loosening nut and the auxiliary nut are nylon lock nuts.

[0014] The tooling for leak testing of irregular interfaces of container equipment provided by this utility model has the following advantages compared with the prior art:

[0015] 1. High internal rigidity and stable reliability: The internal space truss structure is formed by "semi-circular plate + auxiliary tie rod + reinforcing rib + main flange". The reinforcing rib efficiently converts the tension of the tie rod into stable support for the main flange, effectively resisting bending moment and deformation, and providing a solid and non-deformable stress foundation for external sealing. It is especially suitable for high pressure test conditions.

[0016] 2. Multiple load distribution and uniform sealing pressure: Multiple main tie rods are evenly distributed around the circumference and tightened synchronously to ensure that the clamping force of the external cap assembly on the pipe end face is evenly distributed throughout the circumference, fundamentally avoiding local leakage caused by uneven clamping force.

[0017] 3. Precise alignment and excellent sealing effect: The innovative compression fitting seal plate fits precisely with the end cap body through the annular positioning groove, which can automatically and quickly align during installation and achieve an ultra-reliable static seal on the end face;

[0018] 4. Optimized installation process and convenient operation: The tooling adopts a modular design with pre-assembled internal frame and pre-connected external end caps to the main tie rod. During on-site installation, the steps are clear: internal clamping → pre-tightening auxiliary nuts → placing external assembly → passing through the main tie rod → final locking. The process is reasonable and greatly reduces the difficulty of operation and labor intensity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a tooling structure for leak testing of irregularly shaped interfaces of container equipment according to the present invention.

[0020] The components include: 1. End cap body; 2. Compression fitting seal; 3. Round tube; 4. Threaded blind hole; 5. Annular positioning groove; 6. Semi-circular clamping plate; 7. Auxiliary tie rod; 8. Main flange; 9. Reinforcing rib; 10. Main tie rod; 11. Main anti-loosening nut; 12. Auxiliary nut. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 As shown, this embodiment provides a tooling for testing leakage at irregular interfaces of container equipment, which includes an external end cap assembly, an internal support frame assembly, and a three main tie rod assembly connecting the two.

[0025] The external end cap assembly includes an end cap body 1 and a compression fitting sealing plate 2. The end cap body 1 is a circular plate, and the diameter of the end cap body 1 is larger than the outer diameter of the circular tube 3 to be sealed. Three threaded blind holes 4 are evenly distributed circumferentially on the inner end face of the end cap, and high-strength steel wire threaded inserts are pre-embedded in the threaded blind holes 4 of the end cap body 1. The compression fitting sealing plate 2 is a circular plate, and the compression fitting sealing plate 2 is fitted onto the outer periphery of the end cap body 1 through an annular positioning groove 5 integrally formed on the outer end face to achieve locking and positioning.

[0026] The internal support frame assembly includes a semi-circular clamping plate 6, auxiliary tie rods 7, a main flange 8, and reinforcing ribs 9. The semi-circular clamping plate 6 has a groove for engaging with the semi-circular plate inside the pipe opening to be sealed. There are two auxiliary tie rods 7, one end of which is vertically welded to the inner end face of the semi-circular clamping plate 6. The main flange 8 has a main tie rod through hole corresponding to the position and number of the threaded blind holes 4 in the cover body 1, and an auxiliary tie rod through hole for the two auxiliary tie rods 7 to pass through. Each auxiliary tie rod 7 is inclinedly welded to the outer end face of the main flange 8, and the reinforcing rib 9 is a right-angled triangular steel plate, with one right-angled side fully welded to the auxiliary tie rod 7 and the other right-angled side fully welded to the outer end face of the main flange 8.

[0027] The number of main tie rod assemblies is the same as that of the threaded blind holes 4. Each set of main tie rod assemblies includes a main tie rod 10 and a main anti-loosening nut 11. The outer end of each main tie rod 10 is provided with an external thread that mates with the threaded blind hole 4 of the cover body 1. The inner end passes through the corresponding main tie rod through hole on the main flange 8 and is locked by the main anti-loosening nut 11. The inner end of the auxiliary tie rod 7 passes through the main flange 8 and is locked by the auxiliary nut 12. Both the main anti-loosening nut 11 and the auxiliary nut 12 are nylon lock nuts.

[0028] Example

[0029] This embodiment provides a tooling for leak testing of irregular interfaces of container equipment, which is applied to irregular circular pipe interfaces with semi-circular plates on container equipment.

[0030] The external end cap assembly consists of an end cap body 1 and a compression fitting sealing sheet 2. The end cap body 1 is machined from a 20mm thick stainless steel plate, with a diameter 60mm larger than the outer diameter of the pipe opening. It has three M16 threaded blind holes 4 evenly distributed on it, and each blind hole has a pre-embedded steel wire thread sleeve. The compression fitting sealing sheet 2 is made of 10mm thick polyurethane, and its outer end face is integrally formed with an annular positioning groove 5. The annular positioning groove 5 is clearance-fitted with the outer circle of the end cap body 1 to achieve precise fitting.

[0031] The internal support frame assembly consists of a semi-circular clamping plate 6, auxiliary tie rods 7, a main flange 8, and reinforcing ribs 9. The semi-circular clamping plate 6 is made of 20mm thick stainless steel plate, with a U-shaped groove of 12mm width. Two stainless steel bars with a diameter of 10mm serve as auxiliary tie rods 7. One end of the auxiliary tie rods 7 is machined with an M8 thread, and the other end is perpendicularly welded to the inner end face of the semi-circular clamping plate 6 using bevel welding. The main flange 8 is made of 20mm thick stainless steel plate, with three φ18mm main tie rod through holes corresponding to the position of the cover body 1, and two φ12mm auxiliary tie rod through holes. The reinforcing rib 9 is made of 6mm thick stainless steel right-angled triangular steel plate, with one right-angled side fully welded to the auxiliary tie rod 7 and the other right-angled side fully welded to the outer end face of the main flange 8.

[0032] The main tie rod 10 consists of three stainless steel screws, with a specification of M12. The main anti-loosening nut 11 and the auxiliary nut 12 are respectively made of M16 and M8 nylon lock nuts.

[0033] Work process:

[0034] 1. Pre-assembly and internal positioning: First, in the workshop, the auxiliary tie rod 7, the reinforcing rib 9 and the main flange 8 are welded together as one unit. During on-site testing, this internal support frame is placed in a container, and the slot of the semi-circular plate 6 is precisely inserted into the semi-circular plate inside the pipe opening. Then, the auxiliary nut 12 is inserted from one side of the main flange 8 and initially tightened to make the internal frame a stable whole.

[0035] 2. External assembly preparation: Place the compression fitting 2 onto the end cap body 1, and screw the outer threads of the three main tie rods 10 completely into the threaded blind holes 4 of the end cap body 1;

[0036] 3. Overall assembly: Cover the outside of the pipe opening with the end cap assembly with the main tie rod 10, and then pass the inner ends of the three main tie rods 10 through the three main tie rod through holes on the main flange 8 from inside the container.

[0037] 4. Final locking and sealing: Screw the main lock nuts 11 onto the inner ends of the three main tie rods 10. Tighten the three main lock nuts 11 in two steps using a torque wrench. At the same time, tighten the two auxiliary nuts 12. During this process, the internal support frame provides strong reverse support force, and the external cap assembly is tightened to form a reliable seal.

[0038] 5. Testing and disassembly: Connect the test pump and conduct a water pressure or air tightness test as specified. After the test is completed, loosen and remove all nuts to separate and remove the tooling components.

[0039] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0040] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A tooling for leak testing of irregularly shaped interfaces of container equipment, characterized in that, Includes an external end cap assembly, an internal support frame assembly, and a multi-main tie rod assembly connecting the two; The external end cap assembly includes an end cap body and a compression fitting sealing plate; the end cap body is a circular plate, the diameter of the end cap body is larger than the outer diameter of the circular tube to be sealed, and at least two threaded blind holes are evenly distributed circumferentially on the inner end face of the end cap; the compression fitting sealing plate is a circular plate, and the compression fitting sealing plate is fitted onto the outer circumference of the end cap body through an annular positioning groove integrally formed on the outer end face to achieve locking and positioning. The internal support frame assembly includes a semi-circular retaining plate, auxiliary tie rods, a main flange, and reinforcing ribs. The semi-circular retaining plate has a groove for engaging the semi-circular plate inside the pipe opening to be sealed. There are two auxiliary tie rods, one end of which is vertically welded to the inner end face of the semi-circular retaining plate. The main flange has main tie rod through holes corresponding to the position and number of threaded blind holes in the cover body, as well as auxiliary tie rod through holes for the two auxiliary tie rods to pass through. Each auxiliary tie rod is welded to the outer end face of the main flange with the aforementioned reinforcing rib. The number of main tie rod assemblies is consistent with the number of threaded blind holes. Each set of main tie rod assemblies includes a main tie rod and a main anti-loosening nut. The outer end of each main tie rod is provided with an external thread that mates with the threaded blind hole of the end cap body. The inner end of each main tie rod passes through the corresponding main tie rod through hole on the main flange and is locked by the main anti-loosening nut. The inner end of the auxiliary tie rod passes through the main flange and is locked by the auxiliary nut.

2. The tooling for leak testing of irregular interfaces of container equipment according to claim 1, characterized in that, A high-strength steel wire threaded sleeve is pre-embedded in the threaded blind hole of the cover body.

3. The tooling for leak testing of irregular interfaces of container equipment according to claim 1, characterized in that, The number of main tie rods is three, and they are evenly distributed circumferentially.

4. The tooling for leak testing of irregular interfaces of container equipment according to claim 1, characterized in that, The reinforcing rib is a right-angled triangular steel plate, with one right-angled side fully welded to the auxiliary tie rod and the other right-angled side fully welded to the outer end face of the main flange.

5. The tooling for leak testing of irregular interfaces of container equipment according to claim 1, characterized in that, Both the main anti-loosening nut and the auxiliary nut are nylon lock nuts.

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