Fixed tube sheet cooler with cleaning channel

Abstract

The utility model relates to heat exchange equipment technical field discloses a fixed tube sheet cooler with cleaning passage, including casing, end plate, cold pipe and pipe box, has set up the quick release mechanism for locking pipe box and cleaning mechanism on the end plate, the cleaning mechanism includes a cleaning pipe that is through the end plate and has the hole groove in the pipe wall, realizes the normally closed seal to the hole groove through the cooperation of the sleeve, pipe plug and first spring in the cleaning pipe, the quick release mechanism includes first shell, second shell, sliding rod and ball, through pressing sliding rod, utilizes the recess on it to control ball radial contraction or ejection, to selectively clamped or separate from the cooperation groove on the end plate, realizes the quick fixing and unlocking to pipe box, the utility model discloses the above structure has solved the problem that the existing fixed tube sheet cooler shell process inside is difficult to clean, pipe box dismounting is complicated and time -consuming, has the effect that the maintenance operation is convenient and efficient, internal cleaning is thorough, can restore heat exchange efficiency obviously.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a fixed tube sheet cooler with a cleaning channel. Background Technology

[0002] Fixed tube sheet coolers, as a classic shell-and-tube heat exchanger, are widely used in many industrial fields such as petroleum, chemical, power and metallurgy due to their simple and compact structure, robustness and reliability and low manufacturing cost, undertaking the key task of media cooling.

[0003] During long-term operation, especially when dealing with process media that have poor water quality or are prone to crystallization or polymerization, impurities, suspended solids or precipitates in the media can easily adhere to and deposit on the outer wall of the cooler tubes and the inner wall of the shell at low temperatures, gradually forming a hard fouling layer. This fouling layer has an extremely low thermal conductivity, and its presence will significantly increase thermal resistance, causing the heat exchange efficiency of the cooler to continuously decline, failing to meet the requirements of the production process. In severe cases, it may even block the fluid channels and affect the normal operation of the equipment.

[0004] However, due to the inherent structure of fixed tube sheet coolers, the tube bundle is fixedly connected to the shell, making it impossible to remove the entire tube bundle for cleaning as in floating head or U-tube heat exchangers. This results in the shell side becoming a closed and inaccessible space, rendering traditional mechanical cleaning methods impossible. Currently, chemical agent circulation cleaning is commonly used, but this method is not only ineffective against some stubborn fouling substances but may also corrode the equipment itself, and waste liquid disposal puts pressure on the environment. For more thorough cleaning, the tube box, which is fastened to the end plate with numerous bolts, must be disassembled. This process is not only time-consuming and labor-intensive, significantly extending the equipment downtime for maintenance, but frequent disassembly and reassembly can also damage the sealing surfaces, affecting subsequent use.

[0005] Therefore, this utility model proposes a fixed tube sheet cooler with a cleaning channel to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of existing fixed tube sheet coolers, such as difficulty in cleaning the shell side due to the fixed structure, cumbersome and time-consuming tube box disassembly and assembly process, and low maintenance efficiency, this utility model aims to provide a fixed tube sheet cooler with a cleaning channel that has an improved structure and can achieve convenient maintenance and efficient internal cleaning.

[0007] This utility model provides a fixed tube sheet cooler with a cleaning channel, including: a shell, an end plate fixedly connected to the end of the shell, a cooling tube fixed at both ends to the end plate and passing through the interior of the shell, and a tube box that detachably covers the end plate. The cooler also includes a cleaning mechanism disposed on the end plate and a quick-release mechanism for locking or unlocking the tube box and the end plate.

[0008] The cleaning mechanism includes a cleaning tube that passes through the end plate and extends into the housing. The cleaning tube has a groove on its wall. A sleeve is fixedly installed inside the cleaning tube. A tube plug is slidably installed inside the sleeve. A first spring is connected between the tube plug and the sleeve.

[0009] Furthermore, the quick-release mechanism includes a first housing and a second housing, with a slide rod slidably disposed inside the first housing and the second housing. The slide rod has a groove, and multiple balls are movably accommodated inside the first housing and the second housing and controlled by the position of the groove on the slide rod, for selectively engaging or disengaging from the mating groove on the end plate.

[0010] Preferably, the cleaning mechanism further includes a baffle plate, which is rotatably connected to the end plate and is used to open or close the inlet of the cleaning pipe.

[0011] Preferably, the cleaning mechanism further includes a torsion spring connected between the baffle and the end plate to provide a restoring force for the baffle.

[0012] Preferably, the quick-release mechanism further includes a second spring, which is sleeved on the outer periphery of the slide rod and housed within the first and second housings, for providing a restoring force to the slide rod.

[0013] Preferably, the outer edge of the pipe box is provided with a flange, and the quick-release mechanism is connected between the flange and the end plate to achieve quick fixing and separation of the pipe box.

[0014] Preferably, a baffle is also provided inside the shell, and the cooling tube passes through the baffle to enhance the turbulence of the shell-side fluid.

[0015] Preferably, the pipe box is connected to a first connecting pipe and a fourth connecting pipe to form an inlet and outlet channel for the pipe fluid.

[0016] Preferably, the shell is connected to a second pipe and a third pipe to form an inlet and outlet channel for shell-side fluid.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem that the pipe box is usually fixed with bolts in the prior art, which is cumbersome, time-consuming and labor-intensive, and has low maintenance efficiency. It solves the problem that the pipe box is usually fixed with bolts in the prior art, which solves the problem that the disassembly process is cumbersome, time-consuming and labor-intensive, and has low maintenance efficiency. It achieves the technical effect of quickly disassembling and assembling the pipe box, shortening the equipment downtime for maintenance, and reducing the intensity of manual labor.

[0018] 2. This utility model solves the problem that the shell side of a traditional fixed tube sheet cooler has a fixed and closed structure, making it difficult to effectively clean the outer wall of the heat transfer tubes and the inner wall of the shell, which is prone to scaling and thus reduces heat exchange efficiency. It achieves the technical effect of convenient, efficient, and multi-angle spray cleaning of the cooler shell side, effectively restoring the heat exchange performance of the equipment and extending its service life.

[0019] 3. This utility model solves the problem of multiple maintenance steps and poor overall convenience in the prior art by integrating the quick-release mechanism for quick disassembly of the tube box with the cleaning mechanism for internal cleaning into an integrated structural design. It achieves the technical effect of compact overall structure, coherent operation logic and high maintenance convenience, and significantly improves the comprehensive practical value of this type of cooler. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a fixed tube sheet cooler with a cleaning channel proposed in this utility model. Figure 2 This is a schematic diagram of the baffle plate section of a fixed tube sheet cooler with a cleaning channel proposed in this utility model. Figure 3 This is a schematic diagram of the end plate portion of a fixed tube sheet cooler with a cleaning channel proposed in this utility model. Figure 4 This is a schematic diagram of the cleaning pipe section of a fixed tube sheet cooler with a cleaning channel proposed in this utility model. Figure 5 This is a schematic diagram of the slide bar structure of a fixed tube sheet cooler with a cleaning channel proposed in this utility model.

[0021] Legend: 1. Pipe box; 2. First connecting pipe; 3. Second connecting pipe; 4. Third connecting pipe; 5. Fourth connecting pipe; 6. Flange; 7. End plate; 8. Shell; 9. Cleaning mechanism; 901. Cleaning pipe; 902. Groove; 903. Sleeve; 904. First spring; 905. Pipe plug; 906. Baffle; 907. Torsion spring; 10. Cooling pipe; 11. Baffle plate; 12. Quick release mechanism; 1201. Slide rod; 1202. First outer shell; 1203. Second spring; 1204. Second outer shell; 1205. Groove; 1206. Ball bearing. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example: Please refer to Figures 1 to 5 This utility model provides a fixed tube sheet cooler with a cleaning channel, which aims to solve the problem that the shell side of the existing fixed tube sheet cooler is difficult to clean effectively due to its fixed structure, and that it is prone to scaling and affecting heat exchange efficiency after long-term use.

[0024] like Figure 1 As shown, the basic structure of the fixed tube sheet cooler with cleaning channel provided by this utility model consists of a shell 8 of the main body of the equipment. End plates 7 are fixedly connected to both ends of the shell 8. Multiple heat transfer tubes 10 penetrate the interior of the shell 8, and both ends of the heat transfer tubes 10 are fixed to the two end plates 7, thus forming the core channel for heat exchange. Inside the shell 8, baffles 11 for enhancing fluid turbulence are also staggered. All heat transfer tubes 10 pass through these baffles 11. On the outside of the end plates 7, a tube box 1 for distributing fluid is detachably installed. The tube box 1 is connected to the end plates 7 by a flange 6 integrally formed on its outer edge. To form a complete fluid circuit, the pipe box 1 is connected to a first pipe 2 and a fourth pipe 5 for the inlet and outlet of the cold medium, while the shell 8 is connected to a second pipe 3 and a third pipe 4 for the inlet and outlet of the hot medium. To facilitate the cleaning of the inside of the shell 8, a cleaning mechanism 9 is integrated on the end plate 7. In order to enable the cleaning mechanism 9 to be operated quickly, a special quick-release mechanism 12 is provided between the flange 6 and the end plate 7. The quick-release mechanism 12 is used to quickly lock or unlock the pipe box 1 and the end plate 7, while the cleaning mechanism 9 is used to perform high-pressure jet cleaning of the inside of the shell 8 and the outer wall of the cooling pipe 10.

[0025] To solve the above-mentioned technical problems, the fixed tube sheet cooler with cleaning channel integrates a precise quick-release mechanism 12 and a cleaning mechanism 9. Furthermore, the two mechanisms form a structural cooperation and functional linkage relationship to achieve convenient maintenance operations.

[0026] Please refer to the following carefully. Figure 3 , Figure 4 and Figure 5 First, let's explain the quick-release mechanism 12, such as... Figure 5 As shown, the main body of the quick-release mechanism 12 is composed of a first outer shell 1202 and a second outer shell 1204. A slide rod 1201 is slidably disposed inside the mechanism. A groove 1205 is formed on the rod of the slide rod 1201. A ball bearing 1206, serving as a locking element, is also movably housed inside the first outer shell 1202 and the second outer shell 1204. The position of the ball bearing 1206 is controlled by the groove 1205 on the slide rod 1201. When the slide rod 1201 slides to a specific position, the ball bearing 1206... Align the 6 with the groove 1205 and obtain radial movement space. When the slide bar 1201 is in another position, the ball 1206 is pushed outward by the wall of the slide bar 1201, thereby engaging or disengaging into the specially opened mating groove on the end plate 7 to realize the locking or unlocking function. A second spring 1203 is also sleeved on the outer periphery of the slide bar 1201. The second spring 1203 is housed in the first housing 1202 and the second housing 1204 to provide a restoring force for the sliding operation of the slide bar 1201.

[0027] The cleaning mechanism 9 will be explained next, such as... Figure 4 As shown, the main body of the cleaning mechanism 9 is a hollow cleaning tube 901. The cleaning tube 901 passes through the end plate 7 and extends into the internal space of the housing 8. Multiple slots 902 for spraying cleaning fluid are opened on its wall. Inside the cleaning tube 901, a sleeve 903 is fixedly installed. A tube plug 905 is slidably fitted onto the inner wall of the sleeve 903. A first spring 904 connects the tube plug 905 and the sleeve 903. In its natural state, the elastic force of the first spring 904 causes the tube plug 905 to seal the slots 902, preventing leakage during normal operation of the equipment. Figure 3 As shown, in order to control the opening and closing of the cleaning pipe 901, a baffle 906 is rotatably connected to the outer surface of the end plate 7. The baffle 906 is used to block or open the inlet of the cleaning pipe 901. A torsion spring 907 is also connected between the baffle 906 and the end plate 7. The torsion spring 907 provides the baffle 906 with a torsional force to keep it in the closed state.

[0028] Based on the above embodiments, the present invention may further include the following preferred technical solutions: To achieve effective control of the inlet of the cleaning pipe 901, the cleaning mechanism 9 further includes a baffle 906 rotatably connected to the end plate 7. Furthermore, to provide the baffle 906 with automatic reset torque, a torsion spring 907 is connected between the baffle 906 and the end plate 7. For the quick-release mechanism 12, to achieve automatic reset of the slide rod 1201, the quick-release mechanism 12 also includes a second spring 1203. The second spring 1203 is sleeved on the outer periphery of the slide rod 1201 and is completely housed within the first outer shell 1202 and the second outer shell 1204. Inside the cavity, to provide a stable installation interface, a flange 6 is provided on the outer edge of the tube box 1. The entire quick-release mechanism 12 is connected between the flange 6 and the end plate 7 to achieve quick fixation and separation of the two. In order to improve the heat exchange efficiency inside the shell 8, a baffle 11 is also fixedly installed inside the shell 8. All the heat transfer tubes 10 pass through the baffle 11. In order to construct a complete tube-side fluid circuit, the tube box 1 is connected to the first connecting pipe 2 and the fourth connecting pipe 5. In order to construct a complete shell-side fluid circuit, the shell 8 is connected to the second connecting pipe 3 and the third connecting pipe 4.

[0029] The working principle of this fixed tube sheet cooler with a cleaning channel is as follows: During routine cooling and heat exchange, the cold medium fluid enters the tube box 1 through the first connector 2, is then distributed to multiple cooling tubes 10 and flows through the entire shell 8, and finally flows out from the tube box 1 at the other end through the fourth connector 5. At the same time, the hot medium fluid enters the shell 8 through the second connector 3, and under the guidance of the baffle 11, it scours the outer wall of the cooling tube 10 in a turbulent manner, and exchanges heat fully with the cold medium inside the tube. The cooled medium finally flows out through the third connector 4.

[0030] When cleaning and maintenance of the interior of the housing 8 and the outer wall of the cooling tube 10 are required, the operator first presses the slide bar 1201 of the quick-release mechanism 12. The slide bar 1201 slides within the first housing 1202 and the second housing 1204 and compresses the second spring 1203. As the slide bar 1201 moves, the groove 1205 on it reaches the position of the ball 1206. At this time, the ball 1206 loses the radial support of the bar wall and falls inward into the groove 1205, releasing the engagement with the mating groove on the end plate 7. This allows the tube box 1 to be quickly removed from the end plate 7, exposing the cleaning mechanism 9 on the end plate 7.

[0031] After removing the tube box 1, the operator moves the baffle 906 of the cleaning mechanism 9 to overcome the torque of the torsion spring 907 and open the inlet of the cleaning tube 901. Then, the high-pressure cleaning equipment is connected to the cleaning tube 901 and the cleaning fluid is injected. After the high-pressure cleaning fluid enters the cleaning tube 901, its pressure pushes the tube plug 905 to slide in the sleeve 903, while stretching the first spring 904, so that the slot 902 is opened. The high-pressure cleaning fluid is then sprayed out from the slot 902 at multiple angles, powerfully flushing the dirt attached to the inner wall of the housing 8 and the outer wall of the cooling tube 10, completing the efficient internal cleaning operation.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fixed tube sheet cooler with a cleaning channel, comprising: Casing (8); An end plate (7) is fixedly connected to the end of the housing (8), and the end plate (7) is provided with a mating groove that is compatible with the ball (1206); A cooling tube (10) with both ends fixed to the end plate (7) and passing through the inside of the housing (8); A pipe box (1) that can be detachably shielded from the end plate (7); The cooler is characterized in that it further includes a cleaning mechanism (9) disposed on the end plate (7) and a quick-release mechanism (12) for locking or unlocking the tube box (1) and the end plate (7). The cleaning mechanism (9) includes: a cleaning tube (901) that passes through the end plate (7) and extends into the housing (8), a groove (902) is provided on the wall of the cleaning tube (901), a sleeve (903) fixed inside the cleaning tube (901), a tube plug (905) that is slidably disposed inside the sleeve (903), and a first spring (904) connected between the tube plug (905) and the sleeve (903). The quick-release mechanism (12) includes: a first housing (1202) and a second housing (1204), a slide rod (1201) slidably disposed in the first housing (1202) and the second housing (1204), a groove (1205) provided on the slide rod (1201), and a ball (1206) movably accommodated in the first housing (1202) and the second housing (1204) and controlled by the position of the groove (1205) on the slide rod (1201). The ball (1206) is used to selectively engage or disengage from the mating groove on the end plate (7).

2. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, The cleaning mechanism (9) also includes a baffle (906), which is rotatably connected to the end plate (7) and is used to open and close the inlet of the cleaning pipe (901).

3. The fixed tube sheet cooler with a cleaning channel according to claim 2, characterized in that, The cleaning mechanism (9) also includes a torsion spring (907), which is connected between the baffle (906) and the end plate (7).

4. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, The quick-release mechanism (12) also includes a second spring (1203), which is sleeved on the outer periphery of the slide bar (1201) and housed in the first housing (1202) and the second housing (1204).

5. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, The outer edge of the pipe box (1) is provided with a flange (6), and the quick-release mechanism (12) is connected between the flange (6) and the end plate (7).

6. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, A baffle plate (11) is also provided inside the housing (8), and the cooling pipe (10) passes through the baffle plate (11).

7. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, The pipe box (1) is connected to a first connecting pipe (2) and a fourth connecting pipe (5).

8. The fixed tube sheet cooler with a cleaning channel according to claim 1, characterized in that, The housing (8) is connected to a second pipe (3) and a third pipe (4).

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