Connecting pipe sealing device for tube bundle pressure test of electric air-cooled condenser

Abstract

The utility model relates to the technical field of electric air-cooled condenser tube bundle pressure test, and discloses a connecting tube sealing device for electric air-cooled condenser tube bundle pressure test, which comprises a connecting tube body, a split type tube hoop, a gland and an elastic sealing gasket. The split type pipe hoop is formed by oppositely combining two semicircular clamping hoops and is fixedly connected with the outer wall of the connecting pipe body through a circumferential locking assembly. The gland is detachably connected with the split type pipe hoop through an axial connecting assembly, an elastic sealing gasket is arranged between the gland and the end face of a pipe opening of the connecting pipe body, and the outer diameter of the elastic sealing gasket is larger than the inner diameter of the connecting pipe body. The utility model solves the problem that the electric air-cooled condenser is difficult to seal when a pressure test is carried out without a prefabricated flange connecting pipe, has the advantages of simple structure, convenience in installation, reliability in sealing, convenience in disassembly and assembly and the like, avoids the defects of cumbersome operation and poor adaptability of traditional temporary welding or complex clamps, remarkably improves the working efficiency of pressure test, and reduces the labor intensity of workers. And the field operation difficulty and the labor cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of power tube bundle pressure test technology, specifically to a pipe sealing device for pressure testing of power air condenser tube bundles. Background Technology

[0002] In the field of industrial heat exchanger technology, especially in the field of electric air-cooled condensers, large-diameter single-row elliptical finned tube bundles are widely used. These tube bundles must undergo rigorous pressure tests (such as water pressure tests and air tightness tests) before leaving the factory to verify the reliability of their manufacturing process and materials, and to ensure the safe operation of the equipment.

[0003] However, to facilitate flexible connection based on actual piping conditions during on-site installation, the pipe box connection ends of such pipe bundles are usually designed without prefabricated flanges. Due to the lack of standard flange connection surfaces, traditional sealing methods are difficult to apply, leading to sealing difficulties and easy leakage during pressure testing. This not only seriously affects test efficiency but may also result in inaccurate test data due to unreliable sealing, and even pose safety hazards.

[0004] Currently, there is no mature and standardized solution in the industry for pressure testing and sealing of this type of flangeless connection. Existing temporary measures, such as using welded blind flanges or using specially designed fixtures with complex structures, generally suffer from problems such as cumbersome operation, time-consuming and labor-intensive, unstable sealing effect, and difficulty in reuse. They cannot meet the needs of efficient and reliable production testing and increase unnecessary costs. Utility Model Content

[0005] The purpose of this invention is to provide a sealing device for the pipe fitting of an electric air condenser tube bundle during pressure testing. By using a split-type pipe clamp and a pressure cap, the device can quickly seal the pipe fitting body, ensuring the reliability and efficiency of the pressure test.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sealing device for a tube bundle pressure test of an electric air-cooled condenser includes a tube body. A split-type pipe clamp is fitted onto the outer wall of the tube opening of the tube body. The split-type pipe clamp is fixedly connected to the outer wall of the tube body via a circumferential locking assembly. A pressure cap is provided on the tube opening end face of the tube body. The outline of the pressure cap covers the tube opening end face of the tube body, and the pressure cap is detachably connected to the split-type pipe clamp via an axial connecting assembly. An elastic sealing gasket is provided between the pressure cap and the tube opening end face of the tube body. The outer diameter of the elastic sealing gasket is larger than the inner diameter of the tube body.

[0008] Furthermore, the split-type pipe clamp is composed of two semi-circular clamps joined together, and the mating ends of the two clamps are provided with outwardly extending flanges. The circumferential locking mechanism includes a first bolt assembly that passes through the adjacent flanges.

[0009] Furthermore, the edge of the gland is provided with a plurality of connecting through holes evenly distributed along its circumference, and the axial end face of the split-type pipe clamp is provided with a threaded hole at the corresponding position. The axial connection mechanism includes a second bolt assembly that passes through the connecting through holes and is screwed into the threaded hole.

[0010] The beneficial effects of this utility model are:

[0011] The pipe sealing device for pressure testing of electric air condenser tube bundles provided by this utility model has a simple structure, reasonable design, and is easy to manufacture and install. It adopts a combination of split pipe clamps and glands, simulating a flange connection, effectively solving the sealing problem caused by the lack of flanged connections. This design not only ensures the reliability of the sealing process but also makes installation and disassembly convenient and quick, greatly improving the efficiency of pressure testing.

[0012] Furthermore, the split-type pipe clamp consists of two semi-circular clamps, locked together by flanges and bolts. Combined with the elastic deformation of the elastic sealing gasket, it achieves excellent sealing performance and has strong adaptability and versatility. This structure avoids the problems of cumbersome operation and poor adaptability of traditional temporary welding or complex fixtures, reducing the difficulty of on-site operations and labor costs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the pipe sealing device for pressure testing of the tube bundle of the electric air condenser of this utility model;

[0014] Figure 2 This is an exploded structural diagram of the pipe sealing device for pressure testing of the tube bundle of the electric air condenser of this utility model.

[0015] In the figure: 1. Connector body; 2. Split-type pipe clamp; 2-1. Clamp; 2-11. Flange; 2-12. Threaded hole; 2-2. First bolt assembly; 3. Gland; 3-1. Connecting through hole; 4. Elastic sealing gasket; 5. Second bolt assembly. Detailed Implementation

[0016] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] like Figure 1 and Figure 2As shown, this utility model provides a pipe sealing device for pressure testing of tube bundles in electric air-cooled condensers. It is used to seal the pipe box connections of large-diameter single-row elliptical finned tube bundles in electric air-cooled condensers without flanges, in order to conduct pressure tests. The device mainly includes a pipe body 1, a split pipe clamp 2, a gland 3, and an elastic sealing gasket 4.

[0018] The connector body 1 is the connector for the power conduit bundle to be pressure tested, and a split-type clamp 2 is fitted onto the outer wall of its port. The split-type clamp 2 is composed of two semi-circular clamps 2-1 that fit together. The inner diameter of the clamps 2-1 is slightly smaller than the outer diameter of the connector body 1 to ensure clamping force. The mating ends of the clamps 2-1 are provided with outwardly extending flanges 2-11. Circumferential locking is achieved by first bolt assemblies 2-2 (such as bolts and nuts) that penetrate adjacent flanges 2-11, thereby fixing the split-type clamp 2 to the outer wall of the connector body 1. The number of first bolt assemblies 2-2 can be adjusted according to the connector diameter and the pressure test to ensure sufficient locking force.

[0019] The contour of the gland 3 covers the end face of the pipe opening of the connector body 1, and its edge is provided with a plurality of connecting through holes 3-1 evenly distributed circumferentially. The axial end face of the split-type pipe clamp 2 is provided with threaded holes 2-12 corresponding to the positions of the connecting through holes 3-1. A second bolt assembly 5 (e.g., a bolt) passes through the connecting through holes 3-1 and is screwed into the threaded holes 2-12 to achieve a detachable connection between the gland 3 and the split-type pipe clamp 2. The number and specifications of the second bolt assembly 5 should also be selected according to the actual situation to ensure sufficient connection strength.

[0020] An elastic sealing gasket 4 is provided between the end face of the gland 3 and the pipe body 1. The outer diameter of the elastic sealing gasket 4 is larger than the inner diameter of the pipe body 1 to ensure a sealing effect. The elastic sealing gasket 4 can be made of elastic and sealing materials such as rubber or silicone. Its thickness and hardness should be selected according to the test pressure and the surface roughness of the pipe to ensure good sealing performance.

[0021] During installation, first, place the elastic sealing gasket 4 on the end face of the pipe opening of the connector body 1. Then, fit the split-type pipe clamp 2 onto the outer wall of the connector body 1 and tighten it using the first bolt assembly 2-2. Next, align the gland 3 with the split-type pipe clamp 2 and connect and secure it to the split-type pipe clamp 2 using the second bolt assembly 5. By tightening the first bolt assembly 2-2 and the second bolt assembly 5, the split-type pipe clamp 2 tightly clamps the connector body 1, while the gland 3 presses against the elastic sealing gasket 4, achieving a reliable seal on the pipe opening of the connector body 1.

Claims

1. A pipe sealing device for pressure testing of tube bundles in an electric air-cooled condenser, comprising a pipe body (1), characterized in that: A split-type pipe clamp (2) is fitted on the outer wall of the pipe opening of the connector body (1). The split-type pipe clamp (2) is fixedly connected to the outer wall of the connector body (1) through a circumferential locking assembly. A pressure cap (3) is provided on the pipe opening end face of the connector body (1). The outline of the pressure cap (3) covers the pipe opening end face of the connector body (1), and the pressure cap (3) is detachably connected to the split-type pipe clamp (2) through an axial connection assembly. An elastic sealing gasket (4) is provided between the pressure cap (3) and the pipe opening end face of the connector body (1). The outer diameter of the elastic sealing gasket (4) is larger than the inner diameter of the connector body (1).

2. The pipe sealing device for pressure testing of the tube bundle of an electric air-cooled condenser according to claim 1, characterized in that: The split-type pipe clamp (2) is composed of two semi-circular clamps (2-1) joined together. The mating ends of the two clamps (2-1) are provided with outwardly extending flanges (2-11). The circumferential locking assembly includes a first bolt assembly (2-2) that passes through the adjacent flanges (2-11).

3. The pipe sealing device for pressure testing of the tube bundle of an electric air-cooled condenser according to claim 1, characterized in that: The edge of the pressure cap (3) is provided with a plurality of connecting through holes (3-1) evenly distributed along its circumference. The axial end face of the split pipe clamp (2) is provided with a threaded hole (2-12) at the corresponding position. The axial connection assembly includes a second bolt assembly (5) that passes through the connecting through hole (3-1) and is screwed to the threaded hole (2-12).

Images