Sealing device for quick leaking stoppage of tubular heat exchanger
By designing a sealing device for tube heat exchangers, using the cooperation of water plugs, bolt holes, O-rings and other components, the problems of increased repair time and poor welding quality caused by tube bundle leakage are solved, and the effect of rapid and reliable leakage plugging and improving production safety and efficiency are achieved.
Patent Information
- Application Number
- CN202421676799.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the pipe heat exchanger in thermal power plants, the leakage of the pipe bundle causes an increase in repair time and the welding quality is affected, and defects such as incomplete penetration and pores often occur, affecting the maintenance quality and production safety.
A sealing device for a tube heat exchanger is designed, including a water plug, a bolt hole, a first groove, a second groove, a first O-ring and a second O-ring. Through the cooperation of these components, leakage can be quickly plugged, and dirt from the inner wall of the tube bundle can be scraped off by a cleaning device to ensure the sealing effect.
The sealing device can quickly and reliably isolate the water and steam storage inside the pipeline, improve the quality and efficiency of leak plugging, reduce rework and labor costs, and improve the production safety and efficiency of thermal power plants.
Smart Images
Figure CN222881785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sealing devices, in particular to a sealing device for quickly plugging leaks in a tubular heat exchanger. Background Art
[0002] Among the numerous equipment in thermal power plants, there are quite a few tubular heaters and heat exchangers. During normal production, each heater may have leakage problems of varying degrees due to rupture of the tube bundle, which has a great impact on the economy and safety of the thermal power plant.
[0003] In the case of a tube bundle leak in the heater, the heater is generally isolated and then repaired by plugging the tubes to ensure the normal operation of the heater in the thermal power plant. However, due to the cumbersome isolation and safety measures of some large heat exchangers, it is necessary to drain the internal water after isolation before repair work can be carried out. However, the draining time is often too long, which increases the repair time. In addition, due to the influence of factors such as residual water and steam inside the pipeline, the welding quality of the plugging tube repair is directly affected, and defects such as incomplete welding and air holes often occur. This will result in poor maintenance quality, rework, increased labor costs, and reduced production safety and production efficiency of the thermal power plant. Therefore, designing a plugging water plug for tubular heaters is an inevitable requirement for the emergency repair of tubular heat exchangers in thermal power plants. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model provides a sealing device for quickly plugging leaks in a tubular heat exchanger to solve the existing problems raised in the above background technology.
[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sealing device for quickly plugging leaks in a tubular heat exchanger, comprising a water plug, a bolt hole is provided at the end of the water plug, a first groove and a second groove are provided on the outer surface of the water plug, a first O-ring is provided on the inner surface of the first groove, a second O-ring is provided on the inner surface of the second groove, a mounting screw hole is provided at the end of the water plug away from the bolt hole, a cleaning device is provided inside the mounting screw hole, the cleaning device comprises a mounting screw, a telescopic support rod is fixedly connected to the outer surface of the mounting screw, a bent cleaning plate is fixedly connected to the end of the telescopic support rod away from the mounting screw, a cleaning portion is provided on the outer surface of the bent cleaning plate, and a telescopic spring is sleeved on the outer surface of the telescopic support rod.
[0006] Preferably, the first groove and the first O-ring are arranged on a side of the water plug close to the mounting screw hole, and the second groove and the second O-ring are arranged on a side of the water plug close to the bolt hole.
[0007] Preferably, the outer surface of the mounting screw is threadedly connected to the inner surface of the mounting screw hole, and the telescopic support rod, the bent cleaning plate and the telescopic spring are all arranged on the outside of the water plug.
[0008] Preferably, the telescopic struts are arranged in a ring along the outer surface of the mounting screw.
[0009] Preferably, the end of the telescopic spring is fixedly connected to the outer surface of the mounting screw, and the end of the telescopic spring away from the mounting screw is fixedly connected to the inner surface of the bending cleaning plate.
[0010] Beneficial Effects
[0011] The utility model provides a sealing device for rapid leak plugging of a tubular heat exchanger.
[0012] Beneficial effects:
[0013] (1) The sealing device for rapid plugging of leaks in a tubular heat exchanger is used to insert the water plug into the leaking tube bundle of the heat exchanger through the cooperation between the water plug, the bolt hole, the first groove, the second groove, the first O-ring and the second O-ring. The water plug can be used to isolate the water and steam stored in the pipe by cooperating with the first O-ring and the second O-ring. The performance is reliable and the residual medium in the tube bundle of the tubular heat exchanger can be effectively isolated. The clearance between the water plug and the tube bundle of similar diameter is large, and there is no need to accurately measure each tube bundle. The clearance margin can be adjusted by using the first O-ring and the second O-ring of different specifications. The sealing device has a wide range of uses and can be used for various types of tubular heat exchangers. The water plug adopts a cylindrical structure. The shape of the cylindrical surface is convenient for the production of the water plug and the processing accuracy is easy to achieve. The structure of the entire device is simple and easy to process. The precision requirement is relatively low. During the emergency repair process of various types of tubular heat exchangers, the device can be quickly produced, which is conducive to the emergency repair and recovery of the equipment.
[0014] (2) The sealing device for rapid leak plugging of a tubular heat exchanger uses a cleaning device and a cleaning portion on a bent cleaning plate to scrape off dirt attached to the inner wall of the tube bundle when the water plug is inserted into the tube bundle, so that the outer surfaces of the first O-ring and the second O-ring are closely attached to the inner wall of the tube bundle, thereby preventing the dirt in the tube bundle from affecting the better sealing effect of the first O-ring and the second O-ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a schematic cross-sectional structure diagram of the utility model as a whole;
[0017] Figure 3 It is a schematic diagram of the overall split structure of the utility model;
[0018] Figure 4 It is a structural schematic diagram of the cleaning device of the utility model.
[0019] In the figure: 1. water plug; 2. bolt hole; 3. first groove; 4. second groove; 5. first O-ring; 6. second O-ring; 7. mounting screw hole; 8. cleaning device; 81. mounting screw; 82. telescopic support rod; 83. bent cleaning plate; 84. cleaning part; 85. telescopic spring. DETAILED DESCRIPTION
[0020] 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 only 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.
[0021] Embodiment 1:
[0022] like Figure 1-4 As shown, the utility model provides a sealing device for quickly plugging leaks in a tubular heat exchanger, comprising a water plug 1, a bolt hole 2 is provided at the end of the water plug 1, a first groove 3 and a second groove 4 are provided on the outer surface of the water plug 1, a first O-ring 5 is provided on the inner surface of the first groove 3, a second O-ring 6 is provided on the inner surface of the second groove 4, a mounting screw hole 7 is provided at one end of the water plug 1 away from the bolt hole 2, a cleaning device 8 is provided inside the mounting screw hole 7, the cleaning device 8 comprises a mounting screw 81, a telescopic support rod 82 is fixedly connected to the outer surface of the mounting screw 81, a bent cleaning plate 83 is fixedly connected to the end of the telescopic support rod 82 away from the mounting screw 81, a cleaning portion 84 is provided on the outer surface of the bent cleaning plate 83, and a telescopic spring 85 is sleeved on the outer surface of the telescopic support rod 82.
[0023] Specifically, the first groove 3 and the first O-ring 5 are arranged on a side of the water plug 1 close to the mounting screw hole 7 , and the second groove 4 and the second O-ring 6 are arranged on a side of the water plug 1 close to the bolt hole 2 .
[0024] Specifically, the outer surface of the mounting screw 81 is threadedly connected to the inner surface of the mounting screw hole 7 , and the telescopic support rod 82 , the bent cleaning plate 83 and the telescopic spring 85 are all arranged on the outer side of the water plug 1 .
[0025] Specifically, the telescopic support rods 82 are arranged in a ring along the outer surface of the mounting screw rod 81 .
[0026] Specifically, the end of the telescopic spring 85 is fixedly connected to the outer surface of the mounting screw 81 , and one end of the telescopic spring 85 away from the mounting screw 81 is fixedly connected to the inner surface of the bending cleaning plate 83 .
[0027] The working principles and beneficial effects of the above embodiments.
[0028] When in use, after a leak occurs in the tube bundle inside the tubular heat exchanger, a bolt is screwed into the bolt hole 2 to insert the water plug 1 into the leaking tube bundle of the heat exchanger. The end where the cleaning device 8 is located first enters the tube bundle. Since the front end of the whole formed by the multiple bent cleaning plates 83 is smaller than the inner diameter of the tube bundle, and the rear end is larger than the inner diameter of the tube bundle, after the front end of the bent cleaning plate 83 extends into the tube bundle, the bent cleaning plate 83 is squeezed by the tube bundle, so that the telescopic support rod 82 and the telescopic spring 85 are compressed, so that the rear end of the bent cleaning plate 83 enters the tube bundle. Under the elastic action of the telescopic spring 85, the cleaning part 84 on the bent cleaning plate 83 is against the inner wall of the tube bundle. The water plug 1 continues to be pushed into the tube bundle and the water plug 1 is appropriately rotated. At this time, the cleaning part 84 moves along the inner wall of the tube bundle, so that the attached The dirt on the inner wall of the tube bundle is scraped off, so that the outer surfaces of the first O-ring 5 and the second O-ring 6 can fit tightly against the inner wall of the tube bundle to seal the residual medium inside the tube bundle. The entire water plug 1 enters the interior of the tube bundle, isolates the water and steam inside the pipeline, removes the bolts, and then inserts the conventional plug into the end of the tube bundle for welding and plugging. The water plug 1 is cylindrical, compact in structure, and easy to process and produce. The bolt hole 2 processed at one end of the water plug 1 is used to install the bolt, which facilitates the positioning of the water plug 1 such as insertion and removal. After the positioning is completed, the bolts are removed without affecting the installation of the plug. The first O-ring 5 and the second O-ring 6 of different specifications can be assembled in the first groove 3 and the second groove 4 to meet the needs of plugging leaks in tube bundles with similar pipe diameters.
[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sealing device for quickly plugging leaks in a tubular heat exchanger, comprising a water plug (1), characterized in that: A bolt hole (2) is provided at the end of the water plug (1); a first groove (3) and a second groove (4) are provided on the outer surface of the water plug (1); a first O-ring (5) is provided on the inner surface of the first groove (3); a second O-ring (6) is provided on the inner surface of the second groove (4); a mounting screw hole (7) is provided at the end of the water plug (1) away from the bolt hole (2); a cleaning device (8) is provided inside the mounting screw hole (7); the cleaning device (8) comprises a mounting screw rod (81); a telescopic support rod (82) is fixedly connected to the outer surface of the mounting screw rod (81); a bent cleaning plate (83) is fixedly connected to the end of the telescopic support rod (82) away from the mounting screw rod (81); a cleaning portion (84) is provided on the outer surface of the bent cleaning plate (83); and a telescopic spring (85) is sleeved on the outer surface of the telescopic support rod (82).
2. A sealing device for rapid leak plugging of a tubular heat exchanger according to claim 1, characterized in that: The first groove (3) and the first O-ring (5) are arranged on a side of the water plug (1) close to the mounting screw hole (7), and the second groove (4) and the second O-ring (6) are arranged on a side of the water plug (1) close to the bolt hole (2).
3. A sealing device for rapid leak plugging of a tubular heat exchanger according to claim 1, characterized in that: The outer surface of the mounting screw rod (81) is threadedly connected to the inner surface of the mounting screw hole (7), and the telescopic support rod (82), the bent cleaning plate (83) and the telescopic spring (85) are all arranged on the outside of the water plug (1).
4. A sealing device for rapid leak plugging of a tubular heat exchanger according to claim 1, characterized in that: The telescopic support rods (82) are arranged in a ring shape along the outer surface of the mounting screw rod (81).
5. A sealing device for rapid leak plugging of a tubular heat exchanger according to claim 1, characterized in that: The end of the telescopic spring (85) is fixedly connected to the outer surface of the mounting screw (81), and the end of the telescopic spring (85) away from the mounting screw (81) is fixedly connected to the inner surface of the bending cleaning plate (83).