Pressure leakage detection device for heat exchange tube

Abstract

The utility model discloses a heat exchange tube pressing leakage detection device, which comprises a plugging mechanism, the plugging mechanism comprises pressure guide tubes symmetrically inserted at two ends of a heat exchange tube, a gap is arranged between the pressure guide tubes and the inner wall of the heat exchange tube, the outer wall of each pressure guide tube is provided with a pressure guide hole, and the pressure guide tubes are communicated with the heat exchange tube through the pressure guide holes; a length adjusting assembly is arranged between the two pressure guide pipes, and sealing assemblies are detachably connected between the pressure guide pipes and the inner walls of the heat exchange pipes. The pressurizing system comprises an automatic pressurizing pump, a plugging head is fixed to the end, located outside the heat exchange pipe, of one group of pressure guide pipes, and the automatic pressurizing pump communicates with the other group of pressure guide pipes through a hose; and the pressure monitoring system is fixedly communicated with the hose. According to the utility model, a single heat exchange tube of a common shell-and-tube heat exchanger in production can be subjected to pressing detection, and the device has strong applicability to heat exchange tubes with different tube diameters and different lengths, so that the problem that a large heat exchanger cannot be subjected to overall pressing test is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger maintenance equipment technical field especially relates to a heat exchange pipe press leak detection device. BACKGROUND

[0002] The tube-shell heat exchanger is also called the tube heat exchanger and belongs to one kind of partition heat exchanger. The heat exchanger is mainly composed of a shell, a heat transfer pipe bundle, a tube plate, a baffle plate and the like, the shell is generally circular, the shell has the pipe bundle inside, and the pipe bundle is fixed and sealed by the tube plate at both ends. Two kinds of flow media with different temperatures flow in the shell and the pipe of the heat exchanger respectively, the media heat transfer through the heat transfer pipe bundle to exchange heat, so that the two kinds of media can be heated or cooled without mixing, and can be used for heat exchange of flow media such as gas and gas, liquid and liquid, gas and liquid.

[0003] The two kinds of media of the heat exchanger do not contact in normal work, but when the pipe bundle and the tube plate weld joint crack or the pipe bundle has a leakage point, the two kinds of media will mix, causing the production medium pollution and even production accidents. Therefore, it is necessary to regularly detect the heat exchanger by pressing, check whether there is leakage, and the small heat exchanger can be subjected to water pressure test in the shell to observe the pipe leakage, but the large heat exchanger cannot be subjected to overall water pressure test, or the specific leakage point cannot be found after the water pressure test.

[0004] Based on this, the utility model provides a kind of heat exchange pipe press leak detection device. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of heat exchange pipe press leak detection device to solve the problems in the prior art.

[0006] To achieve the above object, the utility model provides the following scheme: the utility model provides a kind of heat exchange pipe press leak detection device, comprising:

[0007] The plugging mechanism includes guide pressure pipes symmetrically inserted into both ends of the heat exchange pipe, a space is arranged between the guide pressure pipe and the inner wall of the heat exchange pipe, a guide pressure hole is formed in the outer wall of the guide pressure pipe, the guide pressure pipe is communicated with the heat exchange pipe through the guide pressure hole, a length adjusting assembly is arranged between the two guide pressure pipes, and a sealing assembly is detachably connected between the guide pressure pipe and the inner wall of the heat exchange pipe.

[0008] The pressing system includes an automatic pressing pump, one group of guide pressure pipes is fixed with a plugging head at one end outside the heat exchange pipe, and the automatic pressing pump is communicated with another group of guide pressure pipes through a hose.

[0009] The pressure monitoring system is fixedly communicated with the hose and is used for monitoring the pressure change in the guide pressure pipe.

[0010] According to the heat exchange pipe pressure testing and leakage detecting device, the length adjusting assembly comprises an external thread lead screw, the external thread lead screw is arranged between the two groups of guide pressure pipes, the guide pressure pipe is sleeved on the outer wall of the external thread lead screw and is threadedly connected with the external thread lead screw.

[0011] According to the heat exchange pipe pressure testing and leakage detecting device, the sealing assembly comprises an external trapezoidal Teflon sealing ring and an internal trapezoidal Teflon sealing ring, the Teflon sealing ring and the internal trapezoidal Teflon sealing ring are coaxially arranged and abut against the outer wall of the heat exchange pipe and the inner wall of the guide pressure pipe respectively, an extrusion assembly is arranged between the Teflon sealing ring and the internal trapezoidal Teflon sealing ring, and the extrusion assembly is used for extruding the Teflon sealing ring and the internal trapezoidal Teflon sealing ring to deform.

[0012] According to the heat exchange pipe pressure testing and leakage detecting device, the extrusion assembly comprises a static wedge-shaped ring and a dynamic wedge-shaped ring, the outer wall of the guide pressure pipe is fixedly connected with a fixed ring, the static wedge-shaped ring abuts against the fixed ring, the dynamic wedge-shaped ring is sleeved on the outer wall of the guide pressure pipe, the static wedge-shaped ring and the dynamic wedge-shaped ring are arranged between the static wedge-shaped ring and the fixed ring, the end of the dynamic wedge-shaped ring extends out of the heat exchange pipe, a locking nut is threadedly connected on the guide pressure pipe, and the locking nut abuts against the dynamic wedge-shaped ring.

[0013] According to the heat exchange pipe pressure testing and leakage detecting device, the cross-sectional shape of the external trapezoidal Teflon sealing ring, the internal trapezoidal Teflon sealing ring, the static wedge-shaped ring and the dynamic wedge-shaped ring is isosceles trapezoidal.

[0014] According to the heat exchange pipe pressure testing and leakage detecting device, the pressure monitoring system comprises a pressure gauge, the pressure gauge is fixedly communicated between the connecting pipe and the hose, and a second control valve is installed on the connecting pipe.

[0015] According to the heat exchange pipe pressure testing and leakage detecting device, a first control valve is installed on the hose, and the connecting pipe is arranged between the first control valve and the guide pressure pipe.

[0016] The utility model discloses the following technical effects:

[0017] The utility model discloses a heat exchange pipe pressure test leak detection device, including automatic pressure pump, hose, first control valve, pressure gauge, second control valve and guide pressure pipe, the automatic pressure pump is connected with the guide pressure pipe through the hose, and the guide pressure pipe is connected with the heat exchange pipe through the first control valve and the second control valve.

[0018] The utility model discloses a heat exchange pipe pressure test leak detection device, including automatic pressure pump, hose, first control valve, pressure gauge, second control valve and guide pressure pipe, the automatic pressure pump is connected with the guide pressure pipe through the hose, and the guide pressure pipe is connected with the heat exchange pipe through the first control valve and the second control valve. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0020] Fig. 1 It is the structural schematic diagram of heat exchange pipe pressure test leak detection device of the utility model;

[0021] Fig. 2 It is the structural schematic diagram of heat exchange pipe pressure test leak detection device of the utility model;

[0022] Fig. 3 It is the structural schematic diagram of heat exchange pipe pressure test leak detection device of the utility model;

[0023] Among them, 1, automatic pressure pump;2, hose;3, first control valve;4, pressure gauge;5, second control valve;6, guide pressure pipe;7, lock nut;8, heat exchange pipe;9, outer thread screw;10, sealing assembly;11, guide pressure hole;12, static wedge ring;13, dynamic wedge ring;14, outer trapezoidal four fluorine sealing ring;15, inner trapezoidal four fluorine sealing ring;16, fixed ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, clear and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0026] With reference to Figs. 1-3 The present application provides a heat exchange pipe press detection device, which comprises:

[0027] The sealing mechanism comprises guide pressure pipes 6 symmetrically inserted into both ends of the heat exchange pipe 8, and a gap is arranged between the guide pressure pipe 6 and the inner wall of the heat exchange pipe 8. A guide pressure hole 11 is arranged on the outer wall of the guide pressure pipe 6, and the guide pressure pipe 6 is communicated with the heat exchange pipe 8 through the guide pressure hole 11. A length adjusting assembly is arranged between the two guide pressure pipes 6, and a sealing assembly 10 is detachably connected between the guide pressure pipe 6 and the inner wall of the heat exchange pipe 8.

[0028] The press system comprises an automatic press pump 1, and one end of one group of guide pressure pipes 6 located outside the heat exchange pipe 8 is fixed with a sealing head. The automatic press pump 1 is communicated with the other group of guide pressure pipes 6 through a hose 2.

[0029] The pressure monitoring system is fixedly communicated with the hose 2 and is used for monitoring the pressure change in the guide pressure pipe 6.

[0030] During the working of the present application, the length of the two groups of guide pressure pipes 6 is adjusted according to the length of the heat exchange pipe 8, the two groups of guide pressure pipes 6 are inserted into the heat exchange pipe 8, and the two groups of guide pressure pipes 6 respectively extend out through both ends of the heat exchange pipe 8. The end part of one group of guide pressure pipes 6 is sealed by the sealing head, and the other group of guide pressure pipes 6 is connected with the automatic press pump 1 through the hose 2. The sealing assembly 10 is arranged between the two groups of guide pressure pipes 6 and the inner wall of the heat exchange pipe 8, so as to ensure the sealing effect of the whole. The automatic press pump 1 is used for pressing in the guide pressure pipe 6, and the pressure is stopped after reaching the preset value. The pressure monitoring system is used for monitoring and observing the pressure change and pressure maintaining condition in the press process.

[0031] The present application realizes the single press detection of the heat exchange pipe 8 of the commonly used shell-and-tube heat exchanger in production, has strong applicability to heat exchange pipes 8 with different diameters and lengths, thereby solving the problem that the whole press test cannot be performed on the large heat exchanger. In addition, the leak point can be quickly and accurately found after the pressure test of the single heat exchange pipe 8, the heat exchanger can be repaired by plugging, and the work load of workers can be greatly reduced. The present application has remarkable economic and social benefits.

[0032] Further optimization scheme, length adjustment assembly includes external thread screw rod 9, external thread screw rod 9 is arranged between two groups of pressure guide pipes 6, pressure guide pipe 6 is sleeved on the outer wall of external thread screw rod 9, and is in threaded connection between external thread screw rod 9. Because two pressure guide pipes 6 and external thread screw rod 9 are not directly positioned, it is necessary to adjust the length between two pressure guide pipes 6 and external thread screw rod 9 outside heat exchange pipe 8, then the connected pressure guide pipe 6 and external thread screw rod 9 are inserted into heat exchange pipe 8, or a positioning member is arranged on one of the two pressure guide pipes 6, so that external thread screw rod 9 can be in a relatively fixed state, facilitating overall length adjustment.

[0033] Further optimization scheme, sealing assembly 10 includes external trapezoidal Teflon sealing ring 14 and internal trapezoidal Teflon sealing ring 15, the Teflon sealing ring and internal trapezoidal Teflon sealing ring 15 are coaxially arranged, and abut against the outer wall of heat exchange pipe 8 and the inner wall of pressure guide pipe 6 respectively, an extrusion assembly is arranged between the Teflon sealing ring and internal trapezoidal Teflon sealing ring 15, and the extrusion assembly is used for extruding the Teflon sealing ring and internal trapezoidal Teflon sealing ring 15 to deform.

[0034] Further optimization scheme, the extrusion assembly includes static wedge-shaped ring 12 and dynamic wedge-shaped ring 13, the outer wall of pressure guide pipe 6 is fixedly connected with fixed ring 16, the static wedge-shaped ring 12 abuts against the fixed ring 16, the dynamic wedge-shaped ring 13 is sleeved on the outer wall of pressure guide pipe 6, the static wedge-shaped ring 12 and the dynamic wedge-shaped ring 13 are arranged between the static wedge-shaped ring 12 and the fixed ring 16, the end of the dynamic wedge-shaped ring 13 extends out of the heat exchange pipe 8, and the pressure guide pipe 6 is threadedly connected with locking nut 7, and the locking nut 7 abuts against the dynamic wedge-shaped ring 13.

[0035] Further optimization scheme, the cross-sectional shape of the external trapezoidal Teflon sealing ring 14, the internal trapezoidal Teflon sealing ring 15, the static wedge-shaped ring 12 and the dynamic wedge-shaped ring 13 is isosceles trapezoidal.

[0036] The external thread screw rod 9 is threadedly connected with the pressure guide pipe 6, and the length can be adjusted by rotation; the fixed ring 16 fixes the static wedge-shaped ring 12, the locking nut 7 is rotated inward to move the dynamic wedge-shaped ring 13 inward, the static wedge-shaped ring 12 and the dynamic wedge-shaped ring 13 extrude the external trapezoidal Teflon sealing ring 14 and the internal trapezoidal Teflon sealing ring 15 at the same time, so that sealing surfaces are formed between the sealing rings and the pressure guide pipe 6, the heat exchange pipe 8 and the wedge-shaped rings, thereby achieving the sealing effect. When the locking nut 7 is rotated outward after the pressing is completed, the dynamic wedge-shaped ring 13 can be pulled out outward, and the external trapezoidal Teflon sealing ring 14 and the internal trapezoidal Teflon sealing ring 15 are separated from the pressure guide pipe 6 and the heat exchange pipe 8 due to the loss of extrusion force and the toughness of the sealing rings, so that the pressure guide pipe 6 and the sealing device can be pulled out.

[0037] Further optimization scheme, the pressure monitoring system includes pressure gauge 4, the pressure gauge 4 is fixedly communicated between the connecting pipe and the hose 2, and the second control valve 5 is installed on the connecting pipe.

[0038] The scheme has been further optimized. A first control valve 3 is installed on the hose 2, and a connecting pipe is set between the first control valve 3 and the pressure guide pipe 6.

[0039] During the pressurization process, the first control valve 3 is turned on, and the automatic pressurization pump 1 pressurizes the pressure guide tube 6 through the hose 2. When the pressure in the pressure guide tube 6 reaches a certain value, the first control valve 3 is turned off, and the second control valve 5 is turned on. The pressure change is monitored by the pressure gauge 4.

[0040] This utility model patent can pressurize a single pressure-conducting tube 6, and the disassembly and assembly are relatively simple. It can quickly perform pressure tests on each heat exchange tube 8, and has good adaptability to heat exchange tubes 8 with different diameters and lengths. It is convenient to use and easy to operate. At the same time, it has good sealing performance and high reliability, and can ensure that the heat exchange tube 8 maintains stable pressure and does not leak at both ends.

[0041] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element 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.

[0042] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A heat exchanger tube pressure testing and leak detection device, characterized in that, include: The sealing mechanism includes pressure guiding pipes (6) symmetrically inserted at both ends of the heat exchange tube (8). There is a gap between the pressure guiding pipe (6) and the inner wall of the heat exchange tube (8). The outer wall of the pressure guiding pipe (6) is provided with a pressure guiding hole (11). The pressure guiding pipe (6) is connected to the heat exchange tube (8) through the pressure guiding hole (11). A length adjustment component is provided between the two pressure guiding pipes (6). A sealing component (10) is detachably connected between the pressure guiding pipe (6) and the inner wall of the heat exchange tube (8). The pressure testing system includes an automatic pressure testing pump (1), wherein a set of pressure guiding pipes (6) is fixed with a plug at one end outside the heat exchange pipe (8), and the automatic pressure testing pump (1) is connected to another set of pressure guiding pipes (6) through a hose (2); A pressure monitoring system is fixedly connected to the hose (2) and is used to monitor the pressure changes in the pressure guide tube (6).

2. The heat exchanger tube pressure testing and leak detection device according to claim 1, characterized in that: The length adjustment assembly includes an external threaded screw (9), which is disposed between two sets of pressure guide tubes (6). The pressure guide tubes (6) are sleeved on the outer wall of the external threaded screw (9) and are threadedly connected to the external threaded screw (9).

3. The heat exchanger tube pressure testing and leak detection device according to claim 1, characterized in that: The sealing assembly (10) includes an outer trapezoidal PTFE sealing ring (14) and an inner trapezoidal PTFE sealing ring (15). The PTFE sealing ring and the inner trapezoidal PTFE sealing ring (15) are coaxially arranged and abut against the outer wall of the heat exchange tube (8) and the inner wall of the pressure guiding tube (6), respectively. An extrusion assembly is provided between the PTFE sealing ring and the inner trapezoidal PTFE sealing ring (15). The extrusion assembly is used to extrude the PTFE sealing ring and the inner trapezoidal PTFE sealing ring (15) to deform.

4. The heat exchanger tube pressure testing and leak detection device according to claim 3, characterized in that: The extrusion assembly includes a stationary wedge ring (12) and a moving wedge ring (13). A fixed ring (16) is fixedly connected to the outer wall of the pressure guiding tube (6). The stationary wedge ring (12) abuts against the fixed ring (16). The moving wedge ring (13) is sleeved on the outer wall of the pressure guiding tube (6). The stationary wedge ring (12) and the moving wedge ring (13) are arranged between the stationary wedge ring (12) and the fixed ring (16). The end of the moving wedge ring (13) extends out of the heat exchange tube (8). A locking nut (7) is threaded onto the pressure guiding tube (6). The locking nut (7) abuts against the moving wedge ring (13).

5. The heat exchanger tube pressure testing and leak detection device according to claim 4, characterized in that: The cross-sectional shape of the outer trapezoidal PTFE sealing ring (14), the inner trapezoidal PTFE sealing ring (15), the stationary wedge ring (12), and the moving wedge ring (13) are all isosceles trapezoids.

6. The heat exchanger tube pressure testing and leak detection device according to claim 1, characterized in that: The pressure monitoring system includes a pressure gauge (4), which is fixedly connected to the hose (2) through a connecting pipe, and a second control valve (5) is installed on the connecting pipe.

7. The heat exchanger tube pressure testing and leak detection device according to claim 6, characterized in that: A first control valve (3) is installed on the hose (2), and the connecting pipe is disposed between the first control valve (3) and the pressure guiding pipe (6).

Images