Evaporator tube bundle plugging device

Abstract

The utility model relates to tube bundle leakage stoppage, and provides an evaporator tube bundle leakage stoppage device which comprises a rubber plug, a through hole formed in the rubber plug, an expansion tube, internal threads arranged on the inner wall of the expansion tube and a screw rod arranged in the through hole. A fixing ring is fixedly arranged at the end, away from the expansion pipe, of the rubber plug. The screw penetrates through the fixing ring and is rotationally connected with the fixing ring. The outer diameter of the expansion pipe is greater than that of the through hole; one end of the expansion pipe is arranged in the through hole, and the screw rod is in threaded connection with the internal thread of the screw rod. The leaking stoppage device for the evaporator tube bundle can uniformly expand, so that the contact area between the rubber plug and the tube bundle is larger, and the leaking stoppage effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of tube bundle leakage plugging, and particularly relates to an evaporator tube bundle leakage plugging device. Background Art

[0002] An evaporator is an object that converts a liquid substance into a gas. The refrigeration system is the field where evaporators are most widely used. The low-temperature condensed liquid passes through the tube bundle of the evaporator, exchanges heat with the outside air, vaporizes and absorbs heat to achieve the refrigeration effect.

[0003] Since the tube bundle of the evaporator needs to exchange heat with the outside, the tube bundle usually adopts thin-walled copper tubes and other materials (usually such materials have good thermal conductivity). However, the strength of such materials is not high and they are easily damaged and leak. And the evaporator usually consists of multiple groups of tube bundles. Therefore, if a single tube bundle leaks, it only needs to be plugged. Although it will affect the operation efficiency of the whole evaporator, the whole can still be used normally. And it is very troublesome to replace the evaporator or the tube bundle. Therefore, usually, priority is given to plugging the leaking tube bundle of the evaporator. The common plugging method is to insert a rubber plug into the leaking part of the tube bundle, and then shorten the length of the rubber plug by squeezing it, but the diameter becomes larger, and then it expands to block the leaking part of the tube bundle. However, in this way of squeezing at both ends, it is difficult for the rubber plug to expand evenly. That is, after expansion, the diameter in the middle of the rubber plug is large and the diameters at both ends are small. The result is that only a part in the middle of the rubber plug contacts the inner wall of the tube bundle, the contact area is small, the plugging is not firm, and it is very easy to leak again during use. Therefore, it is necessary to design a leakage plugging device with better plugging effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an evaporator tube bundle leakage plugging device which can expand evenly, so that the contact area between the rubber plug and the tube bundle is larger and the plugging effect is better.

[0005] The embodiment of the utility model is realized by the following technical solutions: The evaporator tube bundle leakage plugging device of the utility model includes a rubber plug, a through hole opened in the rubber plug, an expansion tube, an internal thread arranged on the inner wall of the expansion tube, and a screw arranged in the through hole; a fixing ring is fixedly arranged at one end of the rubber plug away from the expansion tube, the screw passes through the fixing ring and is rotatably connected with the fixing ring; the outer diameter of the expansion tube is larger than the diameter of the through hole; one end of the expansion tube is arranged in the through hole, and the screw is in threaded connection with the internal thread of the expansion tube.

[0006] Further, a fixing groove is arranged at one end of the through hole close to the expansion tube, and the expansion tube is clamped in the fixing groove.

[0007] Further, a hexagonal nut is fixedly provided on the side of the fixed ring away from the rubber plug; a sleeve is further included. One end of the sleeve is provided with a first clamping groove, and the cross-section of the first clamping groove is hexagonal. The first clamping groove is adapted to the hexagonal nut, and the screw rod is arranged in the hexagonal nut.

[0008] Further, a second clamping groove is provided at one end of the screw rod close to the fixed ring, and the cross-section of the second clamping groove is hexagonal; a hexagonal wrench is inserted into the second clamping groove after passing through the sleeve.

[0009] Further, a fixing plate is provided at one end of the expansion tube away from the rubber plug.

[0010] Further, a rubber ring is sleeved on the outer wall of the sleeve.

[0011] Further, a grip rod is provided on the side wall of the sleeve away from the rubber plug.

[0012] Further, the sleeve and the fixed ring are magnetically connected.

[0013] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: For the evaporator tube bundle leak plugging device of the present invention, when in use, the rubber plug can be directly placed at the corresponding position in the tube bundle of the evaporator, and then the screw rod is rotated by using a wrench. By the rotation of the screw rod, the expansion tube is pulled, so that the expansion tube is squeezed into the through hole. Since the diameter of the expansion tube is larger than the diameter of the through hole, the rubber plug can be extruded, and after it expands and enlarges, it is blocked in the evaporator tube bundle. In this way, because the diameter of the expansion tube is constant and the wall thickness of the rubber plug is consistent, the rubber plug can expand uniformly and consistently along the axial direction, and can better seal a longer section in the evaporator tube bundle, making its sealing area larger and the sealing performance better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required to be used in the embodiment will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the evaporator tube bundle leak plugging device provided by the embodiment of the present invention;

[0016] Figure 2 It is a schematic internal structural diagram of the evaporator tube bundle leak plugging device provided by the embodiment of the present invention;

[0017] Figure 3 Structural schematic diagram of the rubber plug part provided by the embodiment of the present utility model;

[0018] Figure 4 Structural schematic diagram of the inside of the rubber plug provided by the embodiment of the present utility model;

[0019] Figure 5 Structural schematic diagram of the sleeve part provided by the embodiment of the present utility model.

[0020] Icon: 11 - rubber plug, 12 - through hole, 13 - fixing groove, 14 - expansion tube, 15 - fixing plate, 16 - screw, 17 - second clamping groove, 18 - fixing ring, 19 - hexagon nut, 21 - sleeve, 22 - first clamping groove, 23 - hexagon wrench, 24 - rubber ring, 25 - grip rod. Specific implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0023] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is placed habitually. It is only for the convenience of describing 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 of the present utility model.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "arranged", "installed", "connected", and "coupled" are used, they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Embodiment

[0027] The following is further described in conjunction with specific embodiments. As shown in the attached Figure 1 - attached Figure 5 As shown, the evaporator tube bundle leakage plugging device of this embodiment includes a rubber plug 11, a through hole 12 opened in the rubber plug 11, an expansion tube 14, an internal thread provided on the inner wall of the expansion tube 14, and a screw 16 provided in the through hole 12; a fixing ring 18 is fixedly provided at one end of the rubber plug 11 away from the expansion tube 14, the screw 16 passes through the fixing ring 18 and is rotatably connected to the fixing ring 18; the outer diameter of the expansion tube 14 is larger than the diameter of the through hole 12; one end of the expansion tube 14 is arranged in the through hole 12, and the screw 16 is threadedly connected to the internal thread of the expansion tube 14. Specifically, when in use, the rubber plug 11 can be directly placed at the corresponding position in the tube bundle of the evaporator, and then a wrench is used to turn the screw 16. By the rotation of the screw 16, the expansion tube 14 is pulled, so that the expansion tube 14 is squeezed into the through hole 12. Since the diameter of the expansion tube 14 is larger than the diameter of the through hole 12, the rubber plug 11 can be squeezed, and after it expands and enlarges, it is blocked in the evaporator tube bundle. In this way, because the diameter of the expansion tube 14 is constant and the wall thickness of the rubber plug 11 is uniform, the rubber plug 11 can expand uniformly and consistently along the axial direction, and can better seal a longer section in the evaporator tube bundle, making its sealing area larger and the sealing performance better. In addition, since the screw 16 is restricted by the fixing ring 18, it will not move axially. Regarding the connection between the screw 16 and the fixing ring 18, a ring groove can be opened on the outer wall of the screw 16 so that the fixing ring 18 is clamped in the ring groove, or a stepped screw 16 can be used, that is, the diameter of the screw 16 outside the through hole 12 is larger than the diameter of the screw 16 inside the through hole 12, and the inner diameter of the fixing ring 18 is smaller than the diameter of the screw 16 outside the through hole 12. In this way, the screw 16 can also be restricted by the fixing ring 18.

[0028] A fixing groove 13 is provided at one end of the through hole 12 in this embodiment close to the expansion tube 14, and the expansion tube 14 is clamped in the fixing groove 13. Specifically, in this way, the expansion tube 14 can be clamped into the fixing groove 13 without causing the end of the rubber tube to expand, so that the rubber tube can be better inserted into the evaporator tube bundle.

[0029] On one side of the fixing ring 18 away from the rubber plug 11 in this embodiment, a hexagonal nut 19 is fixedly provided; it further includes a sleeve 21. One end of the sleeve 21 is provided with a first clamping groove 22, and the cross-section of the first clamping groove 22 is hexagonal. The first clamping groove 22 is adapted to the hexagonal nut 19, and the screw rod 16 is arranged in the hexagonal nut 19. The sleeve 21 and the fixing ring 18 are magnetically connected. One end of the screw rod 16 close to the fixing ring 18 is provided with a second clamping groove 17, and the cross-section of the second clamping groove 17 is hexagonal; a hexagonal wrench 23 is inserted into the second clamping groove 17 after passing through the sleeve 21. Specifically, for the case where the rubber plug 11 needs to be inserted into a deeper part of the tube bundle, the sleeve 21 can be used to magnetically attract the fixing ring 18, then the rubber plug 11 is sent into the evaporator tube bundle, and then the L-shaped hexagonal wrench 23 is passed through the sleeve 21 and clamped into the second clamping groove 17, and finally the hexagonal wrench 23 is rotated. Since the end of the sleeve 21 is provided with a hexagonal first clamping groove 22, which can cooperate with the hexagonal nut 19, the rubber plug 11 can also be prevented from rotating by holding the sleeve 21 tightly.

[0030] One end of the expansion tube 14 away from the rubber plug 11 in this embodiment is provided with a fixing plate 15.

[0031] A rubber ring 24 is sleeved on the outer wall of the sleeve 21 in this embodiment. Specifically, for the part that needs to block a deeper part of the tube bundle, a measuring tool can be used to measure the depth first, and then the rubber ring 24 is moved to the corresponding length on the sleeve 21, so that the rubber plug 11 can be placed at the part to be blocked more accurately.

[0032] A grip rod 25 is provided on the side wall of one end of the sleeve 21 away from the rubber plug 11 in this embodiment.

[0033] In summary, for the evaporator tube bundle leak plugging device of this embodiment, when in use, the rubber plug 11 can be directly placed at the corresponding position in the evaporator tube bundle, and then the wrench is used to rotate the screw rod 16. By rotating the screw rod 16, the expansion tube 14 is pulled, so that the expansion tube 14 is squeezed into the through hole 12. Since the diameter of the expansion tube 14 is larger than the diameter of the through hole 12, the rubber plug 11 can be squeezed, and after it expands and enlarges, it is blocked in the evaporator tube bundle. In this way, since the diameter of the expansion tube 14 is constant and the wall thickness of the rubber plug 11 is uniform, the rubber plug 11 can expand uniformly and consistently along the axial direction, and can better seal a longer section in the evaporator tube bundle, making its sealing area larger and the sealing performance better.

[0034] The above is only the preferred embodiment of the present invention and is not used 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 in the protection scope of the present invention.

Claims

1. An evaporator tube bundle plugging device, characterized in that: The invention comprises a rubber stopper (11), a through hole (12) provided in the rubber stopper (11), an expansion tube (14), an internal thread provided on the inner wall of the expansion tube (14), and a screw rod (16) provided in the through hole (12); a fixing ring (18) is fixedly provided at one end of the rubber stopper (11) away from the expansion tube (14); the screw rod (16) passes through the fixing ring (18) and is rotatably connected to the fixing ring (18); The outer diameter of the expansion tube (14) is greater than the diameter of the through hole (12); one end of the expansion tube (14) is arranged in the through hole (12), and the screw rod (16) is threadedly connected to the internal thread of the expansion tube (14).

2. The evaporator tube bundle plugging device according to claim 1 is characterized in that: A fixing groove (13) is provided at one end of the through hole (12) close to the expansion tube (14), and the expansion tube (14) is clamped in the fixing groove (13).

3. The evaporator tube bundle plugging device according to claim 1, characterized in that: A hexagonal nut (19) is fixedly provided on a side of the fixing ring (18) away from the rubber plug (11); It also comprises a sleeve (21), wherein one end of the sleeve (21) is provided with a first slot (22), the cross section of the first slot (22) is hexagonal, the first slot (22) is adapted to the hexagonal nut (19), and the screw rod (16) is arranged in the hexagonal nut (19).

4. The evaporator tube bundle plugging device according to claim 3 is characterized in that: A second slot (17) is provided at one end of the screw rod (16) close to the fixing ring (18); the cross section of the second slot (17) is hexagonal; a hexagonal wrench (23) passes through the sleeve (21) and is inserted into the second slot (17).

5. The evaporator tube bundle plugging device according to claim 1, characterized in that: A fixing plate (15) is provided at one end of the expansion tube (14) away from the rubber plug (11).

6. The evaporator tube bundle plugging device according to claim 3, characterized in that: The outer wall of the sleeve (21) is sleeved with a rubber ring (24).

7. The evaporator tube bundle plugging device according to claim 3, characterized in that: A gripping rod (25) is provided on a side wall of one end of the sleeve (21) away from the rubber stopper (11).

8. The evaporator tube bundle leak plugging device according to claim 3, characterized in that: The sleeve (21) is connected to the fixing ring (18) by magnetic attraction.

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