Cooler tube bundle on-site pressurizing leakage detection plugging device and equipment

Abstract

The utility model discloses a cooler tube bundle on-site pressurizing leakage detection plugging device and equipment, solves the problem that in the prior art, which cooler tube bundle leaks does not need to be rapidly judged, and has the beneficial effects that the operation is simple, and pressurizing leakage detection can be carried out on a single tube bundle. According to the specific scheme, the cooler tube bundle field pressing leakage detection plugging device comprises an inlet end pressing tool and a sealing end plugging tool, the inlet end pressing tool is arranged at one end of a cooler tube bundle, the sealing end plugging tool is oppositely arranged at the other end of the cooler tube bundle, and the inlet end pressing tool comprises a hollow rod; the sealing end plugging tool comprises a solid rod, one end of the hollow rod or one end of the solid rod is provided with a limiting block, at least two insulation sleeves are sequentially arranged in the annular direction of the hollow rod or the solid rod in a sleeving mode and limited by the limiting block, and sealing pieces are arranged between the limiting block and the insulation sleeves adjacent to the limiting block and between every two adjacent insulation sleeves respectively. Fasteners are arranged at the ends, far away from the limiting blocks in the circumferential direction, of the hollow rod and the solid rod.

Description

Technical Field

[0001] The utility model relates to the field of coolers, in particular to a device and equipment for pressure testing, leak detection and plugging of a cooler tube bundle on site. Background Technique

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] Most of the power plant generators use hydrogen coolers to cool the hydrogen in the generators. During operation, due to certain reasons, the internal tube bundles of the coolers leak hydrogen, which seriously threatens the operation of the units.

[0004] According to the size of the cooler, the tube bundles of the cooler range from dozens to hundreds. After the cooler is overhauled or before installation, the whole cooler needs to be pressure tested for leak detection. If a leak is confirmed, since multiple tube bundles are together, it is impossible to quickly determine which specific tube in the cooler leaks, and it is necessary to check the inlet and outlet of the cooler one by one.

[0005] In the prior art, most of them adopt a method of fixing a single tube bundle and performing pressure testing at both ends through tapered plugs. However, due to the inaccurate processing of the tapered plugs, the sealing effect is prone to be poor.

[0006] In addition, if the force applied to the tapered plug is too large, it is easy to damage the inner wall of the tube bundle or cause poor sealing performance at the connection between the tube bundle and the partition plate. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a device for pressure testing, leak detection and plugging of a cooler tube bundle on site, which can better seal both ends of a single tube bundle and cause no damage to the tube bundle.

[0008] In order to achieve the above purpose, the utility model is realized by the following technical solutions:

[0009] A device for pressure testing, leak detection and plugging of a cooler tube bundle on site includes a pressure testing tool at the inlet end and a plugging tool at the sealing end. The pressure testing tool at the inlet end is arranged at one end of the cooler tube bundle, and the plugging tool at the sealing end is oppositely arranged at the other end of the cooler tube bundle. The pressure testing tool at the inlet end includes a hollow rod, and the plugging tool at the sealing end includes a solid rod. One end of the hollow rod or the solid rod is provided with a limiting block. At least two insulating sleeves are sequentially sleeved on the circumferential direction of the hollow rod or the solid rod and are limited by the limiting block. Sealing members are respectively arranged between the limiting block and the adjacent insulating sleeve, and between adjacent insulating sleeves. Fasteners are arranged at the ends of the hollow rod and the solid rod in the circumferential direction away from the limiting block, and the fasteners are in contact with the insulating sleeve away from the limiting block.

[0010] For a device for pressure testing, leak detection and plugging of a cooler tube bundle on site as described above, the hollow rod is a hollow screw;

[0011] The solid rod is a solid screw rod, and the arrangement of the hollow screw rod and the solid screw rod facilitates the connection with the fastener.

[0012] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, the fastener is a fastening nut, and the fastening nut can be locked in the circumferential direction of the hollow screw rod or the solid screw rod.

[0013] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, the sum of the lengths of the limiting block, the insulating sleeve, the sealing member and the fastener provided on the hollow rod or the solid rod is less than the sum of the lengths of the hollow rod or the solid rod, so that a set space is still exposed after the fastener is fixed in the circumferential direction of the hollow rod or the solid rod.

[0014] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, two insulating sleeves are respectively arranged in the circumferential direction of the hollow rod or the solid rod. The one close to the limiting block is the first insulating sleeve, and the one in contact with the fastener is the second insulating sleeve. The two insulating sleeves are provided, and in cooperation with the two sealing members, it effectively ensures the plugging of the inlet end of the cooler tube bundle by the pressure testing tool at the inlet end in the circumferential direction, and the plugging of the outlet end of the cooler tube bundle by the plugging tool at the sealing end.

[0015] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, a protruding ear is arranged at one end of the second insulating sleeve far from the first insulating sleeve. Due to the arrangement of the ear, the ear of the second insulating sleeve can be exposed outside the cooler tube bundle, so that the limiting block, the first insulating sleeve and part of the second insulating sleeve enter the cooler tube bundle.

[0016] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, the cross section of the limiting block is circular, and the outer diameters of the limiting block and the insulating sleeve are adapted to the inner diameter of the tube bundle.

[0017] For a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above, the sealing member is a sealing ring;

[0018] An extension rod is arranged at one end of the hollow rod or the solid rod far from the limiting block, and a concave part is arranged on the outer side of the extension rod. After the pressure testing is completed, it is convenient for the staff to clamp the concave part of the extension rod with pliers to take out the pressure testing tool at the inlet end and the plugging tool at the sealing end from the pipe orifice of the cooler tube bundle.

[0019] In a second aspect, the present utility model also provides a device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle, including the device for on-site pressure testing, leak detection, plugging and sealing of a cooler tube bundle as described above. One end of a connecting pipe can be connected to the hollow part of the hollow rod in the pressure testing tool at the inlet end, and the other end of the connecting pipe is connected to a gas source or a water source.

[0020] A leak detection and plugging device for on-site pressure testing of a cooler tube bundle as described above. A control valve and a pressure gauge are provided between the connecting pipe and the gas source or water source. The gas source or water source is controlled by the control valve to be introduced into the connecting pipe and then into the cooler tube bundle, and the gas pressure at the connecting pipe is obtained through the pressure gauge.

[0021] The beneficial effects of the present utility model are as follows:

[0022] 1) In the present utility model, the plugging device is provided. The structure of the pressure testing tool at the inlet end is the same as the outer shape structure of the plugging tool at the sealing end. The difference is that the pressure testing tool at the inlet end is hollow, while the plugging tool at the sealing end is solid. The pressure testing tool at the inlet end and the plugging tool at the sealing end are arranged oppositely. Gas or water can be introduced into the cooler tube bundle through the hollow part of the hollow rod in the pressure testing tool at the inlet end for plugging test. The structures of the pressure testing tool at the inlet end and the plugging tool at the sealing end are simple, and the inlet end and outlet end of the cooler tube bundle can be respectively plugged through fasteners, effectively ensuring the sealing effect with the cooler tube bundle. In this way, each tube bundle can be checked one by one, and it is convenient to quickly find the problematic tube bundle.

[0023] 2) In the present utility model, the plugging device is sleeved with an insulating sleeve and a seal on the circumferential direction of the hollow rod or solid rod. Through the insulating sleeve and the limiting block, and the setting of the seal between adjacent two insulating sleeves, the fastener can squeeze the outer insulating sleeve, which is beneficial to ensuring the sealing performance when the plugging device cooperates with the cooler tube bundle. The whole has the advantages of simple operation and maintenance, strong reliability, and strong practicability.

[0024] 3) In the present utility model, the hollow rod is a hollow screw, and the solid rod is a solid screw. The two can be matched with the fastening nut through a threaded structure. By rotating the fastening nut, pressure can be provided to the insulating sleeve, so that the insulating sleeve and the seal are squeezed and expanded to realize the sealing and fixing of the cooler tube bundle.

[0025] 4) In the present utility model, two insulating sleeves are provided. Due to the setting of the ear of the second insulating sleeve, the ear of the second insulating sleeve can be exposed outside the cooler tube bundle, so that the limiting block, the first insulating sleeve and part of the second insulating sleeve enter the cooler tube bundle.

[0026] 5) In the present utility model, an extension rod is provided at one end of the hollow rod or solid rod away from the limiting block, and a concave part is provided on the outer side of the extension rod, which is convenient for the staff to clamp the concave part of the extension rod with pliers to take out the pressure testing tool at the inlet end and the plugging tool at the sealing end after the pressure testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The schematic diagrams in the specification forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0028] Figure 1 This is the front view of the pressure testing tool at the inlet end of the leak detection and plugging device for the cooler tube bundle according to one or more embodiments of the present utility model.

[0029] Figure 2 This is the front view of the plugging tool at the sealing end of the leak detection and plugging device for the cooler tube bundle according to one or more embodiments of the present utility model.

[0030] In the figure: The distances or sizes between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration.

[0031] Among them: 1. Hollow screw, 2. O-ring, 3. First insulating sleeve, 4. Second insulating sleeve, 5. Fastening nut, 6. Solid screw, 7. Limit block, 8. Ear, 9. Extension rod, 10. Recess. Detailed implementation manners

[0032] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0033] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present utility model. As used herein, unless the present utility model clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations;

[0034] As introduced in the background art, there is a problem in the prior art that it is impossible to quickly judge which one of the cooler tube bundles leaks. To solve the above technical problems, the present utility model proposes a leak detection and plugging device for the cooler tube bundle on-site.

[0035] Embodiment 1

[0036] In a typical implementation manner of the present utility model, refer to Figure 1 and Figure 2As shown in the figure, a device for pressure testing, leak detection and plugging of a cooler tube bundle on site includes a pressure testing tool at the inlet end and a plugging tool at the sealing end. The pressure testing tool at the inlet end is arranged at one end of the cooler tube bundle, and the plugging tool at the sealing end is arranged oppositely at the other end of the cooler tube bundle. The pressure testing tool at the inlet end includes a hollow rod, and the plugging tool at the sealing end includes a solid rod. A limiting block 7 is arranged at one end of the hollow rod or the solid rod. At least two insulating sleeves are sequentially sleeved on the circumferential direction of the hollow rod or the solid rod and are limited by the limiting block. Sealing members are respectively arranged between the limiting block 7 and the adjacent insulating sleeve and between two adjacent insulating sleeves. Fasteners are arranged at the end of the hollow rod and the solid rod away from the limiting block in their circumferential direction. The fasteners are in contact with the insulating sleeve away from the limiting block so as to provide extrusion pressure to the insulating sleeve and the sealing member through the fasteners.

[0037] In this embodiment, the hollow rod is a hollow screw 1, that is, the hollow screw is provided with a through hole, and the through hole is arranged along the central axis direction of the hollow screw; the solid rod is a solid screw 6. The arrangement of the hollow screw and the solid screw is beneficial to the connection with the fasteners.

[0038] Correspondingly, the fastener is a fastening nut 5, and the fastening nut can be locked on the circumferential direction of the hollow screw or the solid screw.

[0039] It is easy to understand that the sum of the lengths of the limiting block 7, the insulating sleeve, the sealing member and the fastener arranged on the hollow rod or the solid rod is less than the sum of the lengths of the hollow rod or the solid rod, so that a set space is still exposed after the fastener is fixed on the circumferential direction of the hollow rod or the solid rod.

[0040] Reference Figure 1 and Figure 2 As shown in the figure, two insulating sleeves are respectively arranged on the circumferential direction of the hollow rod or the solid rod. The insulating sleeve close to the limiting block is the first insulating sleeve 3, and the insulating sleeve in contact with the fastening nut 5 is the second insulating sleeve 4. Two insulating sleeves are arranged. In cooperation with the arrangement of two sealing members, it effectively ensures the plugging of the inlet end of the pressure testing tool at the inlet end of the cooler tube bundle facing the cooler tube bundle and the plugging of the outlet end of the cooler tube bundle by the plugging tool at the sealing end.

[0041] Among them, both the first insulating sleeve 3 and the second insulating sleeve 4 have a set wall thickness, and both of them are hollow insulating sleeves. The specific material can be selected as rubber material; the length of the second insulating sleeve 4 can be set longer than that of the first insulating sleeve 3.

[0042] In addition, a protruding ear 8 is arranged at the end of the second insulating sleeve 4 away from the first insulating sleeve 3. Due to the arrangement of the ear, the ear 8 of the second insulating sleeve can be exposed outside the cooler tube bundle, so that the limiting block, the first insulating sleeve and part of the second insulating sleeve enter the cooler tube bundle.

[0043] It is easy to understand that considering the shape of the cooler tube bundle, the limiting block 7 is a cylindrical structural member, the cross section of the limiting block 7 is circular, and the outer diameters of the limiting block and the insulating sleeve are adapted to the inner diameter of the tube bundle.

[0044] Among them, the seal is a sealing ring, specifically an O-ring;

[0045] In this embodiment, an extension rod 9 is provided at one end of the hollow rod or solid rod away from the limit block. The outer diameter of the extension rod 9 is smaller than that of the hollow rod or solid rod. For the convenience of clamping the extension rod with pliers, a plurality of annular recesses 10 are circumferentially arranged on the extension rod 9. After the pressure test is completed, the staff can conveniently clamp the recess 10 of the extension rod with pliers through the extension rod 9 to remove the inlet-end pressure test tool and the sealing-end plugging tool from the pipe orifice of the cooler tube bundle.

[0046] After the inlet-end pressure test tool provided in this embodiment is placed at the inlet end of the cooler tube bundle, the fastening nut 5 circumferentially arranged on the hollow screw 1 is screwed. The O-ring 2 is squeezed and expanded through the first insulating sleeve 3, the second insulating sleeve 4 and the limit block, so as to realize sealing and fixing at the inlet end of the cooler tube bundle. When the fastening nut 5 is loosened, the O-ring 2 loses extrusion and returns to its original shape, and then the inlet-end pressure test tool can be taken out from the pipe orifice of the cooler tube bundle.

[0047] Regarding the sealing-end plugging tool, the fastening nut 5 circumferentially arranged on the solid screw 6 is screwed. The O-ring 2 is squeezed and expanded through the first insulating sleeve 3, the second insulating sleeve 4 and the limit block 7, so as to realize sealing and fixing at the outlet end of the cooler tube bundle. When the fastening nut 5 is loosened, the O-ring 2 loses extrusion and returns to its original shape, and then the sealing-end plugging tool can be taken out from the pipe orifice of the cooler tube bundle.

[0048] Embodiment Two

[0049] This embodiment provides a cooler tube bundle on-site pressure test leak detection and plugging device, including the cooler tube bundle on-site pressure test leak detection and plugging device described in Embodiment One. One end of the connecting pipe can be connected to the hollow part (through hole) of the hollow rod in the inlet-end pressure test tool, and the other end of the connecting pipe is connected to a gas source or a water source.

[0050] It should be noted that the gas source can be an air compressor, and the water source can be a water tank. The connecting pipe is connected to the water tank through a water pump.

[0051] The outer diameter of the connecting pipe is adapted to the diameter of the hollow part of the hollow screw. To further ensure the sealing performance, a plug is arranged at a set position in the circumferential direction of the connecting pipe. After the connecting pipe extends into the hollow screw, a part of the plug can be inserted into the hollow part of the hollow screw. Specifically, from one end of the plug to the other end close to the gas source, the outer diameter of the plug gradually increases.

[0052] In addition, a control valve and a pressure gauge are arranged between the connecting pipe and the gas source or the water source. The gas source or the water source is controlled to be introduced into the connecting pipe through the control valve, and then introduced into the cooler tube bundle. The gas pressure at the connecting pipe is obtained through the pressure gauge. Among them, the control valve can be an existing control switch.

[0053] When starting to apply pressure, gas or water passes through the connecting pipe, through the control valve and pressure gauge, and accesses the hollow part of the hollow screw of the inlet-end pressure application tool. When it contacts the end face of the cooler tube bundle (cooler copper tube) at the ear of the second insulating sleeve, the O-ring expands and is stressed through the fastening nut and the two insulating sleeves, achieving the effect of sealing and fastening. The sealing-end plugging tool and the inlet-end pressure application tool are fastened and sealed in the same way. When the pressure reaches the required pressure of the cooler, close the control valve for a pressure-holding test to complete the pressure application process for a single tube bundle. After the pressure application process is completed, loosen the fastening nut and use pliers to remove the pressure application tool, and replace it in a timely manner according to the number of cooler tube bundles and the wear condition of the O-ring to ensure the sealing performance.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An on-site pressure test, leak detection and plugging device for a cooler tube bundle, characterized in that It includes a pressure application tool at the inlet end and a plugging tool at the sealing end. The pressure application tool at the inlet end is arranged at one end of the cooler tube bundle, and the plugging tool at the sealing end is oppositely arranged at the other end of the cooler tube bundle. The pressure application tool at the inlet end includes a hollow rod, and the plugging tool at the sealing end includes a solid rod. A limiting block is arranged at one end of the hollow rod or the solid rod. At least two insulating sleeves are sequentially sleeved on the circumferential direction of the hollow rod or the solid rod and are limited by the limiting block. Sealing members are respectively arranged between the limiting block and the adjacent insulating sleeve and between two adjacent insulating sleeves. Fasteners are arranged at the ends of the hollow rod and the solid rod in the circumferential direction away from the limiting block, and the fasteners are in contact with the insulating sleeve away from the limiting block.

2. The on-site pressure test, leakage detection and plugging device for the cooler tube bundle according to claim 1, characterized in that, The hollow rod is a hollow screw. The solid rod is a solid screw.

3. A field pressure test leak detection and plugging device for a cooler tube bundle according to claim 2, characterized in that, The fastener is a fastening nut.

4. The on-site pressure test leak detection and plugging device for the cooler tube bundle according to claim 1, characterized in that, The sum of the lengths of the limiting block, the insulating sleeve, the sealing member and the fastener arranged on the hollow rod or the solid rod is less than the sum of the lengths of the hollow rod or the solid rod.

5. The on-site pressure test leak detection and plugging device for the cooler tube bundle according to claim 1, characterized in that Two of the insulating sleeves are respectively arranged on the circumferential direction of the hollow rod or the solid rod. The one close to the limiting block is the first insulating sleeve, and the one in contact with the fastener is the second insulating sleeve.

6. The on-site pressure test leak detection and plugging device for the cooler tube bundle according to claim 5, characterized in that, A protruding ear is arranged at one end of the second insulating sleeve away from the first insulating sleeve.

7. The on-site pressure test, leak detection and plugging device for the cooler tube bundle according to claim 1, characterized in that, The cross section of the limiting block is circular, and the outer diameters of the limiting block and the insulating sleeve are adapted to the inner diameter of the tube bundle.

8. A field pressure test leak detection and plugging device for a cooler tube bundle according to claim 1, characterized in that, The sealing member is a sealing ring. An extension rod is arranged at one end of the hollow rod or the solid rod away from the limiting block, and a concave portion is arranged on the outer side of the extension rod.

9. An on-site pressure test, leak detection and plugging device for a cooler tube bundle, characterized in that, It includes a field pressure application and leak detection and plugging device for a cooler tube bundle according to any one of claims 1-8. One end of a connecting pipe can be connected to the hollow part of the hollow rod in the pressure application tool at the inlet end, and the other end of the connecting pipe is connected to a gas source or a water source.

10. A field pressure test, leak detection and plugging device for a cooler tube bundle according to claim 9, characterized in that, A control valve and a pressure gauge are arranged between the connecting pipe and the gas source or the water source.

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