Tube bundle leakage testing device

Abstract

One end of a tube bundle body communicates with the input end of a heat exchanger, the other end of the tube bundle body communicates with one end of a detection tube, the other end of the detection tube is fixedly connected to one side of a pressure tube, a pressure meter is fixedly arranged on one side of the pressure tube, and a listening device is fixedly arranged on one side of the pressure tube. A pressure measurement detection method and an acoustic detection method are combined through the pressure pipe and the sound listening device, after the pipe bundle body is cleaned, under the condition that no foreign matter or impurity exists in the pipe bundle body, one end of the pipe bundle body is sequentially communicated with the detection pipe, the pressure pipe and the sound listening device, and by observing the change of the pressure value on the pressure pipe and the change of sound waves in the sound listening device, the detection result is obtained. Therefore, the leakage condition of the tube bundle bodies of the leaked heat exchanger is detected one by one, the operation is simple and convenient, and the tube bundle body leakage detection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a tube bundle leak testing device. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] As far as the existing technology is concerned, there are 314 DMTO1 and 2 line coolers, 260 DCC unit coolers, and 42 MTBE unit coolers; the company has more than 1,000 coolers. In many cases, the cooler tube bundles are thinned and perforated due to chemical corrosion, ionization corrosion, microbial corrosion, and harmful medium corrosion of the cooling medium, resulting in material contamination and material cross-contamination, so it is necessary to frequently detect the tube bundles for leakage.

[0004] However, the tube bundle leakage detection device in the prior art has a complex structure and a large size, which limits the use scenarios and inevitably increases the difficulty of operation. Utility Model Content

[0005] The embodiment of the present application provides a tube bundle leak testing device, aiming to ensure easy operation while improving the efficiency of tube bundle leakage detection.

[0006] To achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: a tube bundle leak test device, comprising a tube bundle body, a detection tube, a pressure tube, a pressure gauge, a sounder, and an external air source interface; one end of the tube bundle body is connected to the input end of the heat exchanger, the other end of the tube bundle body is connected to one end of the detection tube, the other end of the detection tube is fixedly connected to one side of the pressure tube, the pressure gauge is fixedly arranged on one side of the pressure tube, the sounder is fixedly arranged on one side of the pressure tube, and the external air source interface is opened on one side of the pressure tube.

[0007] Furthermore, a handle is fixedly provided at the lower end of the pressure tube, and lifting ears are provided on both sides of one end of the pressure tube relative to the handle, and the pressure gauge is arranged between the lifting ears.

[0008] Furthermore, a connection hole for connecting the detection tube is opened on one side of the pressure tube, and the diameter of the connection hole is consistent with the diameter of the detection tube.

[0009] Furthermore, a one-way valve is provided on the connection path of the external gas source interface, which can limit the pressure inside the pressure tube.

[0010] Furthermore, a control valve is provided between the tube bundle body and the detection tube, one end of the control valve is communicated with the output end of the tube bundle body, and the other end of the control valve is communicated with the input end of the pressure tube.

[0011] Furthermore, a fixed cover is arranged between the listening device and the pressure tube. The fixed cover is trumpet-shaped and its small-diameter end is connected to the end surface of the pressure tube on one side relative to the detection tube. The sound inlet end of the listening device is arranged in the cover cavity of the fixed cover.

[0012] Furthermore, a ring plate is fixedly arranged between the fixed cover and the pressure pipe, one side of the ring plate is fixedly connected to the outer side surface of the pressure pipe, and the other side of the ring plate is sleeved with the small diameter section end of the fixed cover.

[0013] Furthermore, a side of the ring plate close to the fixed cover has a concave structure, and a peripheral surface of the concave structure fits with an end surface of the small diameter section of the fixed cover.

[0014] Furthermore, the handle is columnar, and a convex rib is arranged on the periphery of the handle. The convex rib is spiral, and the convex rib spirally extends to an end surface of the handle away from the pressure tube.

[0015] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0016] The present application combines the pressure measurement detection method and the acoustic detection method through a pressure tube and a listening device. After the tube bundle body is cleaned and there are no foreign matter or impurities in the tube bundle body, one end of the tube bundle body is connected to the detection tube, the pressure tube, and the listening device in sequence. By observing the changes in the pressure value on the pressure tube and the changes in the sound waves in the listening device, the leakage of each tube bundle body of the leaking heat exchanger is detected. The operation is simple and the efficiency of tube bundle leakage detection is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the embodiment of the present application in an assembled state;

[0019] Figure 2 It is a schematic diagram of the structure of the embodiment of the present application in a top view;

[0020] Figure 3 This is a schematic diagram of the structure of an embodiment of the present application;

[0021] Figure 4This is a schematic diagram of the structure of the ring plate in the embodiment of the present application;

[0022] Figure 5a , Figure 5b Figure 5c , Figure 5d Schematic diagrams of four structures of the ring plate in the embodiments of the present application.

[0023] Icons: 1-tube bundle body; 10-detection tube; 20-pressure tube; 201-connection hole; 202-external gas source interface; 21-handle; 211-convex rib; 22-lifting ear; 23-pressure gauge; 24-sealing ring; 30-sounding device; 31-fixed cover; 40-ring plate; 41-concave structure; 50-check valve; 51-control valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] Combination Figure 1-5, a tube bundle leak test device includes a tube bundle body 1, a detection tube 10, a pressure tube 20, a pressure gauge 21, and a sounding device 30; one end of the tube bundle body 1 is connected to the input end of the heat exchanger, the other end of the tube bundle body 1 is connected to one end of the detection tube 10, the other end of the detection tube 10 is fixedly connected to one side of the pressure tube 20, the pressure gauge 21 is fixedly arranged on one side of the pressure tube 20, and the sounding device 30 is fixedly arranged on one side of the pressure tube 20.

[0027] The tube bundle leak test device in the present application can be an integrated structure consisting of a detection tube 10, a pressure tube 20, a pressure gauge 21 and a listening device 30, or it can be assembled into a whole by assembling various parts. It is mainly used in the leak test operation scenario of the tube bundle in the heat exchanger, and can also be used in the leakage detection operation scenario of the tube bundle wall in various industries. It should be noted that when there is a leak in the tube bundle body 1, the flow of air will cause vibration around the flow port. Therefore, on the one hand, the staff can judge the leakage of the tube bundle body 1 by observing the value change of the pressure gauge 21 fixedly connected to one side of the pressure tube 20; on the other hand, they can listen to the sound in the listening device 30 to judge the leakage of the tube bundle body 1. The operation is simple and the detection result is significantly improved.

[0028] In addition, the present application uses an external gas source connected to the external gas source interface 202 to inject gas into the pressure tube 20, so that the pressure in the pressure tube 20 is greater than the standard atmospheric pressure, so as to achieve the target pressure of the leakage detection operation of the tube bundle body 1. The setting of the sealing ring ensures that the external gas source can stably pressurize the pressure tube 20, and prevents the pressure tube 20 from leaking during pressurization and affecting the normal leakage test operation of the tube bundle body 1.

[0029] In order to make the present application applicable to various detection environments, a handle 21 is fixedly provided at the lower end of the pressure tube 20, and lifting ears are provided on both sides of one end of the pressure tube 20 away from the handle 21, and the pressure gauge 21 is provided between the lifting ears. The setting of the handle 21 is convenient for operators to take and convenient for the installation of the tube bundle leak test device in the present application. The setting of the lifting ears is to ensure the stable connection between the pressure tube 20 and the working surface, thereby ensuring the stable progress of the detection operation, so as to improve the detection operation efficiency of the tube bundle leak test device.

[0030] A connection hole 201 for connecting the detection tube 10 is provided on one side of the pressure tube 20, and the diameter of the connection hole 201 is consistent with the diameter of the detection tube 10. The detection tube 10 in the present application is fixedly connected to the connection hole 201 of the pressure tube 20, so that the tube cavity of the detection tube 10 and the tube cavity of the pressure tube 20 form a whole, ensuring that the detection tube 10 and the pressure tube 20 are in the same pressure, so as to avoid leakage of the tube bundle body 1 due to unequal pressure and produce erroneous detection results.

[0031] A one-way valve 50 is provided on the connection path of the external gas source interface 202, which can limit the pressure inside the pressure pipe 20. The one-way valve 50 is provided to ensure that the pressure of the tube bundle body 1 can be equal to that of the pressure pipe when the tube bundle body 1 is connected to the pressure pipe 20, so as to avoid the inner wall of the tube bundle body 1 from being broken due to the pressure inside the pressure pipe 20 being greater than the pressure inside the tube bundle body 1.

[0032] A control valve 51 is provided between the tube bundle body 1 and the detection tube 10, one end of the control valve 51 is connected to the output end of the tube bundle body 1, and the other end of the control valve 51 is connected to the input end of the pressure tube 20. The setting of the control valve 51 can ensure in advance that the tube bundle body 1 and the pressure tube 20 are at equal pressure.

[0033] The use scheme of the control valve is as follows: when the tube bundle body 1 is not connected to the pressure pipe 20, the control valve 51 is closed, so that the tube bundle body 1 and the pressure pipe 20 are two different chambers, and the pressure inside the tube bundle body 1 is equal to the pressure inside the pressure pipe 20; when the tube bundle body 1 is in the pressure pipe 20, the control valve is opened, and the tube bundle body 1 and the pressure pipe 20 are in the same chamber environment and share the same atmospheric pressure. When there is a leak in the tube bundle body 1, the value of the pressure gauge 23 will change, and the one-way valve 50 can continue to inflate the pressure pipe 20 to avoid the body of the pressure pipe 20 and / or the tube bundle body 1 from being fractured due to the non-isobaric environment.

[0034] A fixed cover 31 is fixedly installed between the listening device 30 and the pressure tube 20. The fixed cover 31 is trumpet-shaped and its small-diameter end is connected to the end surface of the pressure tube 20 on one side relative to the detection tube 10. The sound inlet end of the listening device 30 is arranged in the cover cavity of the fixed cover 31 and extends to the small-diameter end port of the fixed cover 31.

[0035] The sound listening device 30 in the present application is fixedly arranged on one side of the pressure tube 20 through a fixed cover 31, and is used to detect the change of sound waves in the pressure tube 20. The fixed cover 31 is set in a trumpet shape to further amplify the sound of the cavity of the pressure tube 20 to ensure the authenticity of the leakage test result of the tube bundle body 1.

[0036] In addition, the working principle of the listening device 30 in the present application is that air vibration generates an electrical signal, which is then amplified by the sound wave of the fixed cover 31 and transmitted to the acoustic sensor inside the listening device 30, and then transmitted to the eardrum of the listening device 30 to the ear of the staff. The working process of the listening device 30 in the present application is similar to the process in the medical industry where a doctor uses a stethoscope to listen to the patient's heartbeat to judge the patient's condition, and the listening device 30 in the present application can be an existing product in the prior art, such as the pipe listening device model AquaM300.

[0037] A ring plate 40 is fixedly disposed between the fixed cover 31 and the pressure pipe 20 . One side of the ring plate 40 is fixedly connected to the outer side of the pressure pipe 20 , and the other side of the ring plate 40 is sleeved with the small diameter end of the fixed cover 31 .

[0038] The pressure tube 20 and the fixed cover 31 in the present application are connected by a ring plate 40 to avoid direct contact between the listening device 30 and the pressure tube 20 to generate vibrations that affect the authenticity of the test results. The ring plate 40 and the pressure tube 20 in the present application can be an integrated molding structure to reduce the vibration weakening during the leakage of the tube bundle body 1, resulting in the test results not being consistent with reality. The fixed cover 31 is sleeved with the ring plate 40. This arrangement facilitates the installation and fixation of the listening device 30 on the one hand, and reduces the workload of the operator on the other hand.

[0039] The side of the ring plate 40 close to the fixed cover 31 has a concave structure 41 , and the circumferential surface of the concave structure 41 is in contact with the end surface of the small diameter section of the fixed cover 31 .

[0040] In the above scheme, the present application provides four different structures for the ring plate 40, which are: outer square inner circle structure, outer circle inner square structure, outer square inner square structure, outer circle inner circle structure. The ring plate 40 in the present application adopts an inner circle outer circle structure. The inner diameter of the ring plate 40 is consistent with the inner diameter of the fixed cover 31. When installing the listening device 30, the small diameter section of the fixed cover 31 can be directly connected to the concave structure 41 by sleeve or clamping, and the fixed cover 31 is connected to the circumference of the concave structure 41, simplifying the connection between the listening device 30 and the pressure tube 20.

[0041] The handle 21 is columnar, and a convex rib 211 is arranged on the periphery of the handle 21. The convex rib 211 is spiral, and the convex rib 211 spirally extends to the end surface of the handle 21 away from the pressure pipe 20. The purpose of such arrangement is to increase the friction between the handle 21 and the palm of the staff, so as to ensure that the staff can hold the tube bundle leak test device in the present application firmly to perform the leak test operation of the tube bundle body 1.

[0042] In addition, to highlight the benefits of the present application, the detection tube 10 in the embodiment of the present application is a single one, which is used for leak testing of a single tube bundle body 1 in a heat exchanger. Leak testing of multiple tube bundle bodies 1 can also be performed by increasing the number of detection tubes 10 .

[0043] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0044] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A tube bundle leak testing device, characterized in that: It comprises a tube bundle body (1), a detection tube (10), a pressure tube (20), a pressure gauge (23), a sounding device (30), and an external gas source interface (202); One end of the tube bundle body (1) is connected to the input end of the heat exchanger, the other end of the tube bundle body (1) is connected to one end of the detection tube (10), the other end of the detection tube (10) is fixedly connected to one side of the pressure tube (20), the pressure gauge (23) is fixedly arranged on one side of the pressure tube (20), the sound sensor (30) is fixedly arranged on one side of the pressure tube (20), and the external gas source interface (202) is opened on one side of the pressure tube.

2. The tube bundle leak testing device according to claim 1, characterized in that: A handle (21) is fixedly provided at the lower end of the pressure tube (20), and lifting ears (22) are provided on both sides of one end of the pressure tube (20) away from the handle (21), and the pressure gauge (23) is arranged between the lifting ears (22).

3. The tube bundle leak testing device according to claim 2, characterized in that: A connection hole (201) for connecting to the detection tube (10) is provided on one side of the pressure tube (20), and the diameter of the connection hole (201) is consistent with the diameter of the detection tube (10).

4. The tube bundle leak testing device according to claim 1, characterized in that: A one-way valve (50) is provided on the connection path of the external gas source interface (202), which can limit the pressure inside the pressure tube (20).

5. The tube bundle leak testing device according to claim 1, characterized in that: A control valve (51) is provided between the tube bundle body (1) and the detection tube (10); one end of the control valve (51) is connected to the output end of the tube bundle body (1), and the other end of the control valve (51) is connected to the input end of the pressure tube (20).

6. The tube bundle leak testing device according to claim 1, characterized in that: A fixed cover (31) is arranged between the sound listening device (30) and the pressure tube (20); the fixed cover (31) is trumpet-shaped and its small-diameter end is connected to an end surface of the pressure tube (20) on one side relative to the detection tube (10); and the sound inlet end of the sound listening device (30) is arranged in a cover cavity of the fixed cover (31).

7. The tube bundle leak testing device according to claim 6, characterized in that: A ring plate (40) is fixedly arranged between the fixed cover (31) and the pressure pipe (20), one side of the ring plate (40) is fixedly connected to the outer side surface of the pressure pipe (20), and the other side of the ring plate (40) is sleeved with the small diameter section end of the fixed cover (31).

8. The tube bundle leak testing device according to claim 7, characterized in that: The side of the ring plate (40) close to the fixed cover (31) has a concave structure (41), and the peripheral surface of the concave structure (41) is in contact with the end surface of the small diameter section of the fixed cover (31).

9. The tube bundle leak testing device according to claim 2, characterized in that: The handle (21) is columnar, and a convex rib (211) is provided on the periphery of the handle (21), the convex rib (211) is spirally shaped, and the convex rib (211) spirally extends to an end surface of the handle (21) away from the pressure pipe (20).

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