Pressure testing device for heat exchanger

Abstract

The utility model discloses a pressure testing device for a heat exchanger, which relates to the technical field of heat exchanger processing and comprises a support frame, a fixing device for fixing a heat exchange tube is arranged on the support frame, a liquid inlet end of the heat exchange tube is connected with a water supply device, the water supply device comprises a water pump and a buffer tank, a water outlet end of the water pump is connected with the buffer tank, and the buffer tank is connected with the water pump. A water outlet of the buffer tank is communicated with the liquid inlet end of the heat exchange pipe through a liquid inlet pipe, the liquid outlet end of the heat exchange pipe is sealed, and a pressure gauge is arranged on the buffer tank. The fixing device is arranged on the supporting frame and used for fixing the heat exchange pipe, the buffer tank is arranged and used for buffering the flow speed of liquid entering the heat exchange pipe, and the problem that the pressure in the heat exchange pipe rises too fast and cannot be accurately controlled is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger processing, in particular to a pressure testing device for a heat exchanger. Background Art

[0002] The spiral wound heat exchanger is widely used in chemical, air separation, LNG liquefaction and other equipment due to its compact structure and high heat transfer efficiency. In recent years, its application in hydrogenation equipment has also gradually increased. The use of spiral wound heat exchangers can greatly improve heat transfer efficiency, reduce fuel gas consumption, and reduce production costs. The spiral wound heat exchanger is a new type of wall-type heat exchanger formed by winding the heat exchange tubes at a certain spiral angle on the central cylinder, and the adjacent layers of heat exchange tubes are reversely wound, and the heat exchange tubes in the same layer and the adjacent layers are respectively maintained at a certain tube spacing and layer spacing through the pads. It is widely used in industrial equipment. Due to its compact structure, high heat transfer efficiency, ability to withstand high pressure, ability to realize multi-stream fluid heat exchange and strong heat compensation ability, it has incomparable advantages over shell-and-tube heat exchangers, especially in energy saving, heat transfer efficiency and floor space.

[0003] The main defect of the existing wound tube heat exchanger is that it is difficult to maintain the equipment after it is manufactured. Starting from the second layer, the heat exchange tubes below each layer cannot be replaced. In order to ensure the winding and welding quality of each layer of heat exchange tubes, it is necessary to prevent damage to the heat exchange tubes during equipment manufacturing. Therefore, the heat exchange tube pressure test must be carried out after each layer is wound.

[0004] At present, the pressure test of heat exchange tubes is carried out by steel tube manufacturers or by using a pressure test device to test a single heat exchange tube before the heat exchange tube is inserted into the tube. Since the diameter of the heat exchange tube of the coiled tube heat exchanger is thin and the volume is small, the existing pressure test device is not applicable and will cause the pressure in the heat exchange tube to rise quickly and the pressure cannot be accurately controlled. Utility Model Content

[0005] The utility model aims to provide a pressure testing device for a heat exchanger, so as to solve the problem of low pressure testing accuracy of heat exchange tubes in the manufacturing process of a coiled tube heat exchanger.

[0006] To achieve the above-mentioned purpose, the utility model provides a pressure testing device for a heat exchanger, comprising a support frame, a fixing device for fixing a heat exchange tube is provided on the support frame, the liquid inlet end of the heat exchange tube is connected to a water supply device, the water supply device comprises a water pump and a buffer tank, the water outlet end of the water pump is connected to the buffer tank, the water outlet of the buffer tank is connected to the liquid inlet end of the heat exchange tube through a liquid inlet pipe, the liquid outlet end of the heat exchange tube is sealed, and a pressure gauge is provided on the buffer tank.

[0007] Furthermore, the fixing device includes a first connector connected to the liquid inlet end of the heat exchange tube and a second connector connected to the liquid outlet end of the heat exchange tube.

[0008] Furthermore, the water inlet end of the liquid inlet pipe is sealed and connected to the buffer tank, the water outlet end of the liquid inlet pipe is detachably sealed and connected to the first connector, and the liquid inlet end of the heat exchange tube is connected to the water outlet end of the liquid inlet pipe.

[0009] Furthermore, the second connector is sealedly connected to the liquid outlet end of the heat exchange tube.

[0010] Furthermore, the support frame includes a support table top and support legs, and a placement groove is provided on the support table top.

[0011] Furthermore, a fixed bracket and a sliding bracket are respectively provided at both ends of the placement slot, the fixed bracket is detachably fixedly connected to the supporting desktop, and the sliding bracket is slidably connected to the placement slot.

[0012] Furthermore, the first connecting head is arranged on the fixing bracket, and the first connecting head is detachably connected to the fixing bracket.

[0013] Furthermore, the second connecting head is arranged on the sliding bracket, and the second connecting head is detachably connected to the sliding bracket.

[0014] Furthermore, the sliding bracket includes a push plate and a sliding base slidably connected to the placement groove.

[0015] Furthermore, a plurality of positioning holes are provided along the length direction of the placement groove, the sliding base is provided with mounting holes matching the positioning holes, and the sliding base is fixed to the supporting table top by bolts or positioning pins passing through the mounting holes and the positioning holes.

[0016] The present application provides a support frame and a fixing device to fix and limit the heat exchange tubes that need to be pressure tested, and provides a buffer tank in the water supply device to buffer the flow rate of the liquid entering the heat exchange tubes, thereby preventing the pressure in the heat exchange tubes from rising too quickly and the pressure cannot be accurately controlled. The position of the liquid inlet end of the heat exchange tube is fixed by providing a fixed bracket to maintain a stable connection with the buffer tank, and the distance between the sliding bracket and the fixed bracket can be adjusted by providing a sliding bracket to adapt to heat exchange tubes of different sizes and lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model in one embodiment;

[0019] Figure 2 This is a top view of the entire machine in one implementation manner of the utility model.

[0020] List of parts and reference numerals:

[0021] 1. Support frame, 11. Positioning hole, 12. Placement groove; 2. Heat exchange tube; 3. Water pump; 4. Buffer tank; 5. Liquid delivery pipe; 6. Fixed bracket; 7. First connector; 8. Sliding bracket, 81. Sliding base, 82. Push plate; 9. Second connector. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0023] It should be noted that many specific details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific implementation methods disclosed below.

[0024] In the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0025] Embodiment 1:

[0026] like Figure 1 and Figure 2 As shown, the utility model provides a pressure test device for a heat exchanger, including a support frame 1, a fixing device for fixing a heat exchange tube 2 is provided on the support frame 1, the liquid inlet end of the heat exchange tube 2 is connected to a water supply device, the water supply device includes a water pump 3 and a buffer tank 4, the water outlet end of the water pump 3 is connected to the buffer tank 4, the water outlet of the buffer tank 4 is connected to the liquid inlet end of the heat exchange tube 2 through a liquid inlet pipe, the liquid outlet end of the heat exchange tube 2 is sealed, and a pressure gauge is provided on the buffer tank 4.

[0027] In this embodiment, a support frame 1 is provided, and a fixing device is provided on the support frame 1 to fix the heat exchange tube 2 that needs to be pressure tested. A water supply device is provided to connect the liquid inlet end of the heat exchange tube 2 to supply liquid, so as to test the pressure bearing capacity of the heat exchange tube 2. A buffer tank 4 is provided in the water supply device to buffer the flow rate of the liquid entering the heat exchange tube 2, so as to prevent the pressure in the heat exchange tube 2 from rising too quickly and the pressure cannot be accurately controlled.

[0028] As a preferred implementation of this embodiment, the fixing device includes a first connector 7 connected to the liquid inlet end of the heat exchange tube 2 and a second connector 9 connected to the liquid outlet end of the heat exchange tube 2 .

[0029] By arranging the first connector 7 and the second connector 9 for fixing the two ends of the heat exchange tube 2 in the fixing device, the heat exchange tube 2 to be pressure tested is fixed and limited.

[0030] As a preferred implementation of this embodiment, the water inlet end of the liquid inlet pipe is sealed and connected to the buffer tank 4, the water outlet end of the liquid inlet pipe is detachably sealed and connected to the first connector 7, and the liquid inlet end of the heat exchange tube 2 is connected to the water outlet end of the liquid inlet pipe.

[0031] By setting a buffer tank 4 at the liquid outlet end of the water pump 3, the test pressure water passes through the buffer tank 4 and then enters the heat exchange tube 2, so as to buffer the outlet water of the water pump 3, thereby preventing the problem of rapid pressure rise in the heat exchange tube 2 and inability to accurately control the pressure due to the thin diameter and small volume of the heat exchange tube 2.

[0032] As a preferred implementation of this embodiment, the second connector 9 is sealed and connected to the liquid outlet of the heat exchange tube 2. During the pressure test, the liquid outlet of the heat exchange tube 2 needs to be sealed to prevent liquid leakage from affecting the pressure test accuracy. The connection between the second connector 9 and the heat exchange tube 2 is sealed, and an elastic sealing structure such as a sealing gasket can be provided in the second connector 9.

[0033] As a preferred implementation of this embodiment, the support frame 1 includes a support tabletop and support legs, and the support tabletop is provided with a placement slot 12. A fixed bracket 6 and a sliding bracket 8 are respectively provided at both ends of the placement slot 12, the fixed bracket 6 is detachably fixedly connected to the support tabletop, and the sliding bracket 8 is slidably connected to the placement slot 12.

[0034] The first connecting head 7 is disposed on the fixing bracket 6 , and the first connecting head 7 is detachably connected to the fixing bracket 6 .

[0035] The second connecting head 9 is disposed on the sliding bracket 8 , and the second connecting head 9 is detachably connected to the sliding bracket 8 .

[0036] By setting a placement groove 12 on the supporting table, spiral heat exchange tubes 2 and various other irregularly shaped heat exchange tubes 2 can be used, and heat exchange tubes 2 of different shapes and sizes can be fixed and pressure tested. By respectively setting a fixed bracket 6 and a sliding bracket 8 at both ends of the placement groove 12, the first connector 7 is set on the fixed bracket 6, and the second connector 9 is set on the sliding bracket 8, and the distance between the first connector 7 and the second connector 9 can be adjusted according to the length of the heat exchange tube 2. Adapt to the pressure test operation of heat exchange tubes 2 of different lengths and sizes. Since the first connector 7 is connected to the buffer tank 4 through the liquid delivery pipe 5, in order to ensure the stability of the connection structure at both ends of the liquid delivery pipe 5, the first connector 7 is set to be connected to the fixed bracket 6. When adjusting according to the length of the heat exchange tube 2, only the position of the second connector 9 needs to be adjusted, and the first connector 7 does not move.

[0037] As a preferred implementation of this embodiment, the sliding bracket 8 includes a push plate 82 and a sliding base 81 slidably connected to the placement groove 12. A plurality of positioning holes 11 are provided along the length direction of the placement groove 12, and the sliding base 81 is provided with mounting holes matching the positioning holes 11. The sliding base 81 is fixed to the supporting tabletop by passing bolts or positioning pins through the mounting holes and the positioning holes 11.

[0038] By setting the sliding bracket 8 as Figure 1 As shown, it includes a vertically arranged push plate 82 and a horizontally arranged sliding base 81. The bottom of the sliding base 81 is provided with a protrusion that cooperates with the placement groove 12. When the distance between the second connecting head 9 and the first connecting head 7 needs to be adjusted according to the length of the heat exchange tube 2, the bolts or positioning pins used for positioning are taken out, and the operator pushes the push plate 82 of the sliding bracket 8 to adjust the position of the second connecting head 9. After adjusting to a suitable position, the mounting hole on the sliding base 81 is fixedly connected to the positioning hole 11 at the corresponding position by bolts or positioning pins, the liquid inlet end of the heat exchange tube 2 to be tested is connected to the first connecting head 7, and the liquid outlet end is connected to the second connecting head 9, the start switch of the water pump 3 is turned on, and the pressure test operation is performed.

[0039] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A pressure test device for a heat exchanger, characterized in that: It comprises a support frame, on which a fixing device for fixing a heat exchange tube is provided, the liquid inlet end of the heat exchange tube is connected to a water supply device, the water supply device comprises a water pump and a buffer tank, the water outlet end of the water pump is connected to the buffer tank, the water outlet of the buffer tank is connected to the liquid inlet end of the heat exchange tube through a liquid inlet pipe, the liquid outlet end of the heat exchange tube is sealed, and a pressure gauge is provided on the buffer tank; The fixing device includes a first connector connected to the liquid inlet end of the heat exchange tube and a second connector connected to the liquid outlet end of the heat exchange tube; the support frame includes a supporting table top and supporting legs, and a placement groove is provided on the supporting table top; a fixed bracket and a sliding bracket are respectively provided at both ends of the placement groove, the fixed bracket is detachably fixedly connected to the supporting table top, and the sliding bracket is slidably connected to the placement groove.

2. A pressure test device for a heat exchanger according to claim 1, characterized in that: The water inlet end of the liquid inlet pipe is sealed and connected to the buffer tank, the water outlet end of the liquid inlet pipe is detachably sealed and connected to the first connector, and the liquid inlet end of the heat exchange tube is communicated with the water outlet end of the liquid inlet pipe.

3. A pressure test device for a heat exchanger according to claim 1, characterized in that: The second connector is sealed and connected to the liquid outlet end of the heat exchange tube.

4. A pressure test device for a heat exchanger according to claim 1, characterized in that: The first connecting head is arranged on the fixing bracket, and the first connecting head is detachably connected to the fixing bracket.

5. A pressure test device for a heat exchanger according to claim 1, characterized in that: The second connecting head is arranged on the sliding bracket, and the second connecting head is detachably connected to the sliding bracket.

6. A pressure testing device for a heat exchanger according to claim 1, characterized in that: The sliding bracket comprises a push plate and a sliding base which is slidably connected to the placement groove.

7. A pressure testing device for a heat exchanger according to claim 6, characterized in that: A plurality of positioning holes are provided along the length direction of the placement groove, the sliding base is provided with mounting holes matching the positioning holes, and the sliding base is fixed on the supporting desktop by bolts or positioning pins passing through the mounting holes and the positioning holes.

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