Leakage testing gun for heat exchanger tube bundle of petrochemical device

Abstract

The utility model discloses a leakage testing gun for a heat exchanger tube bundle of a petrochemical device. A petrochemical device heat exchanger tube bundle leakage testing gun comprises a cover body, the cover body is in flange connection with an installation plate provided with a heat exchange tube, a partition plate is arranged in the cover body, a first gas pipe and a second gas pipe are installed on the cover body, two fixing plates are installed at the upper end of the first gas pipe, the two fixing plates are connected through a connecting rod, and the connecting rod is connected with the cover body. A threaded rod is arranged on the fixing plate located at the upper end. The petrochemical device heat exchanger tube bundle leakage test gun can inject air in the cover body into all wire harnesses at one time through the cover body and related components, compared with an existing mode that air is injected through an injection gun head, a gun head and the position of the gun head do not need to be arranged, operation is convenient, and applicability is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a leak detection gun for heat exchanger tube bundles in petrochemical plants. Background Technique

[0002] A heat exchanger is a heat exchange device used to transfer heat from one fluid to another fluid without the two fluids coming into direct contact. It is widely used in various industrial fields, such as electric power, chemical industry, petroleum, food processing, etc. There are many types of heat exchangers, and common types include: tubular heat exchangers, plate heat exchangers, spiral plate heat exchangers, etc. Among them, the tubular heat exchanger is the most common type. It consists of a group of tubes, with one fluid flowing inside the tubes and the other fluid flowing outside the tubes. No matter what type of heat exchanger, its working principle is based on the basic principle of heat transfer, that is, heat is transferred from a high-temperature object to a low-temperature object. In a heat exchanger, heat is transferred from one fluid to another fluid until the temperatures of the two fluids reach equilibrium.

[0003] The prior art discloses a leak detection gun for heat exchanger tube bundles in petrochemical plants for ensuring the normal operation of petrochemical plants, which is composed of a variable rubber plug 1, a short head gun head 2, a gun head slide plate 3, a short head gun tail 4, a pressure gauge seat 5, a gun rod 6, a ball valve 7, a main gun tail 8, a hose joint 9, a hose 10, and a main gun head 11. This device has a novel design, a simple structure, and is easy to operate. With it, the leak detection and blockage detection of the heat exchanger tube bundles in petrochemical plants can be carried out conveniently, quickly, and accurately.

[0004] The above device realizes the effect of detecting multiple tube bundles at one time by connecting multiple short head wall heads through a hose. However, since the positions of the short head gun heads are fixed, and the arrangements of different types of heat exchanger tube bundles are different, the applicability is poor.

[0005] Therefore, it is necessary to provide a leak detection gun for heat exchanger tube bundles in petrochemical plants to solve the above technical problems. Summary of the Utility Model

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a leak detection gun for heat exchanger tube bundles in petrochemical plants, which can be applicable to heat exchangers of different specifications.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] Petrochemical plant heat exchanger tube bundle leak detection gun, comprising: a detection mechanism, the detection mechanism includes a cover body, the cover body is flange-connected to a mounting plate provided with heat exchange tubes, a partition is arranged inside the cover body, a first air pipe and a second air pipe are mounted on the cover body, a fixing plate is mounted at the upper end of the first air pipe, the fixing plate is in two pieces, the two fixing plates are connected by a connecting rod, a threaded rod is arranged on the fixing plate at the upper end, a sealing chamber is movably arranged at the lower end of the threaded rod, a turning handle is arranged at the upper end of the threaded rod, a valve is arranged on the sealing chamber, an air inlet and an air outlet are arranged on the valve, the air inlet is connected to an external air pipe, and the air outlet communicates with the sealing chamber.

[0009] Preferably, the partition extends outwards beyond the edge of the cover body and protrudes a certain length in a direction away from the cover body, and a groove is provided at a corresponding position of the mounting plate, and the partition is adapted to the groove.

[0010] Preferably, the turning handle is a hollow cylindrical shape inside.

[0011] Preferably, a pressure gauge is arranged on the sealing chamber.

[0012] Preferably, a connecting rod is arranged on the outer wall of the sealing chamber, and a fixing ring is arranged at the end of the connecting rod, and the fixing ring is slidably sleeved on the connecting rod.

[0013] Preferably, a plug is threadedly installed at the opening of the second air pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) By setting the cover body and related components, the air in the cover body can be injected into all the wire bundles at one time. Compared with the existing method of injecting air with an injection gun head, there is no need to set the gun head and the position of the gun head, and the operation is convenient and the applicability is wide;

[0016] (2) By setting grooves and other related components, the connection effect between the partition and the cover body is enhanced;

[0017] (3) By inserting a long rod such as a steel pipe into the turning handle, the torque is increased, which is convenient for the staff to tighten the sealing chamber with less force. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the heat exchanger tube bundle leak detection gun and the tube bundle provided by the utility model;

[0019] Figure 2 It is a schematic structural diagram of the first perspective of the heat exchanger tube bundle leak detection gun provided by the utility model;

[0020] Figure 3Schematic diagram of the second perspective of the leak detection gun for the heat exchanger tube bundle of the petrochemical device provided by the present utility model;

[0021] Figure 4 Schematic diagram of the structure of the first embodiment of the leak detection gun for the heat exchanger tube bundle of the petrochemical device provided by the present utility model;

[0022] Figure 5 Schematic diagram of the structure of the sixth embodiment of the leak detection gun for the heat exchanger tube bundle of the petrochemical device provided by the present utility model.

[0023] Among them, the names corresponding to the reference numerals are: 100, detection mechanism; 101, first air pipe; 102, second air pipe; 103, cover body; 104, partition board; 105, fixing plate; 106, connecting rod; 107, turning handle; 108, threaded rod; 109, sealing chamber; 110, valve; 111, air inlet; 112, air outlet; 113, pressure gauge; 114, fixing ring; 115, plug; 116, bolt; 201, heat exchange tube; 202, mounting plate. Specific embodiments

[0024] The present utility model will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present utility model include but are not limited to the following embodiments.

[0025] First embodiment:

[0026] As Figures 1-5 shown, a leak detection gun for the heat exchanger tube bundle of the petrochemical device provided by the present utility model is shown, where Figure 1 shown is a type of tubular heat exchanger, and its tube bundle is U-shaped, Figure 1Shown are its wire harness and a detection mechanism 100 for inspecting the airtightness of the wire harness. The detection mechanism 100 includes a cover body 103. The cover body 103 is flange-connected to a mounting plate 202 provided with a heat exchange tube 201 and fixed by bolts 116. A partition 104 is provided inside the cover body 103. A first air pipe 101 and a second air pipe 102 are mounted on the cover body 103. The medium for inspecting the airtightness of the wire bundle is air. The air enters from the first air pipe 101, flows through the wire bundle, and then goes to the second air pipe 102. When the end of the second air pipe 102 is blocked, as the air in the first air pipe 101 continuously enters, the air will be compressed in the wire bundle, and the pressure inside the pipe will increase. Based on this, the airtightness of the wire harness is detected. Specifically, a fixing plate 105 is mounted at the upper end of the first air pipe 101. The fixing plate 105 is in two pieces, and the two fixing plates 105 are connected by a connecting rod 106. This part forms a support frame fixed at the end of the first air pipe 101. A threaded rod 108 is provided on the upper fixing plate 105. A sealing chamber 109 is movably provided at the lower end of the threaded rod 108. A bearing is also provided between the threaded rod 108 and the sealing chamber 109. The end of the threaded rod 108 is mounted on the inner ring of the bearing. A turning handle 107 is provided at the upper end of the threaded rod 108. When the turning handle 107 rotates, it drives the threaded rod 108 to rotate. While the threaded rod 108 rotates on the fixing plate 105, its end moves downward and pushes the sealing chamber 109 downward until the sealing chamber 109 is pressed against a fixing plate 105 located below. This fixing plate 105 is annular and is mounted at the upper end of the first air pipe 101. A valve 110 is provided on the sealing chamber 109. An air inlet 111 and an air outlet 112 are provided on the valve 110. The air inlet 111 is connected to an external air pipe and pumps air inward. The air outlet 112 communicates with the sealing chamber 109. As Figure 1 shown by the arrow direction, the air enters the sealing chamber 109 from the air outlet 112 and then is discharged from the second air pipe 102 after passing through the heat exchange tube 201. Since the second air pipe 102 is closed, the air is squeezed inside the pipe. Then the valve 110 is closed to stop inflation. Finally, the device and the heat exchange tube 201 are placed in a water tank to observe bubbles or use a stethoscope to listen for any air leakage sound to determine the airtightness of the pipe.

[0027] By providing the cover body 103 and related components, the air inside the cover body 103 can be injected into all the wire harnesses at one time. Compared with the existing method of using an injection gun head to inject air, there is no need to set up a gun head and the position of the gun head, which is convenient to operate and has a wide range of applicability.

[0028] Second Embodiment:

[0029] As Figure 3As shown, the partition 104 extends outward beyond the edge of the cover 103 and protrudes a certain length away from the cover 103. A groove is provided at the corresponding position of the mounting plate 202, and the partition 104 is adapted to the groove. When the cover 103 is connected to the mounting plate 202, the end of the partition 104 is embedded in the groove on the mounting plate 202, and the partition 104 divides the internal space of the cover 103 into two spaces.

[0030] By setting grooves and other related components, the connection effect between the partition 104 and the cover 103 is enhanced.

[0031] Third Embodiment:

[0032] As Figure 4 shown, the throttle grip 107 is a hollow cylindrical shape.

[0033] By inserting a long rod such as a steel pipe into the throttle grip 107, the torque is increased, making it convenient for the staff to tighten the sealing chamber 109 with less force.

[0034] Fourth Embodiment:

[0035] As Figure 4 shown, a pressure gauge 113 is provided on the sealing chamber 109. The pressure gauge 113 can not only directly read the pressure value inside the sealing chamber 109, but also judge the bundle tightness by comparing the change of the reading of the pressure gauge 113 over a period of time after the valve 110 is closed.

[0036] Fifth Embodiment:

[0037] As Figure 4 shown, a connecting rod is provided on the outer wall of the sealing chamber 109, and a fixing ring 114 is provided at the end of the connecting rod. The fixing ring 114 is slidably sleeved on the connecting rod 106, and the outer wall of the connecting rod 106 is smooth. The function of the fixing ring 114 and the connecting rod is to restrict the slight rotation of the sealing chamber 109 driven by the rotation of the threaded rod 108, and only allow it to move in the vertical direction.

[0038] Sixth Embodiment:

[0039] As Figure 5 shown, a plug 115 is threadedly installed at the opening of the second air pipe 102. The plug 115 installed on the second air pipe 102 can seal the opening to prevent air from overflowing from the opening of the second air pipe 102. At the same time, the threaded connection method facilitates the installation and disassembly of the plug 115.

[0040] Working Principle: By setting the cover 103 and related components, the air in the cover 103 can be injected into all the wire harnesses at one time.

[0041] The above embodiments are only one of the preferred embodiments of the present utility model and should not be used to limit the protection scope of the present utility model. Any modification or polishing that has no substantial meaning made on the main design concept and spirit of the present utility model, as long as the technical problems solved are still consistent with those of the present utility model, shall be included within the protection scope of the present utility model.

Claims

1. A leak detection gun for the heat exchanger tube bundle of a petrochemical plant, characterized in that, Including: A detection mechanism (100), the detection mechanism (100) includes a cover body (103), the cover body (103) is flange-connected to a mounting plate (202) provided with a heat exchange tube (201), a partition plate (104) is provided inside the cover body (103), a first air pipe (101) and a second air pipe (102) are installed on the cover body (103), a fixing plate (105) is installed at the upper end of the first air pipe (101), the fixing plate (105) is in two pieces, the two fixing plates (105) are connected by a connecting rod (106), a threaded rod (108) is provided on the upper fixing plate (105) located at the upper end, a sealing chamber (109) is movably provided at the lower end of the threaded rod (108), a turning handle (107) is provided at the upper end of the threaded rod (108), a valve (110) is provided on the sealing chamber (109), an air inlet (111) and an air outlet (112) are provided on the valve (110), the air inlet (111) is connected to an external air pipe, and the air outlet (112) communicates with the sealing chamber (109).

2. The leak detection gun for the heat exchanger tube bundle of the petrochemical plant according to claim 1, wherein The partition plate (104) extends outward beyond the edge of the cover body (103) and protrudes a certain length in a direction away from the cover body (103), and a groove is provided at a corresponding position of the mounting plate (202), and the partition plate (104) is adapted to the groove.

3. The leak detection gun for the heat exchanger tube bundle of the petrochemical plant according to claim 1, characterized in that, The turning handle (107) is a hollow cylindrical shape inside.

4. The leak detection gun for the heat exchanger tube bundle of the petrochemical plant according to claim 1, wherein A pressure gauge (113) is provided on the sealing chamber (109).

5. The leak detection gun for the heat exchanger tube bundle of the petrochemical plant according to claim 4, characterized in that, A connecting rod is provided on the outer wall of the sealing chamber (109), and a fixing ring (114) is provided at the end of the connecting rod, and the fixing ring (114) is slidably sleeved on the connecting rod (106).

6. The leak testing gun for the heat exchanger tube bundle of the petrochemical plant according to claim 1, characterized in that A plug (115) is threadedly installed at the opening of the second air pipe (102).

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