A tool for disassembling a shell-and-tube cooler

Abstract

This utility model belongs to the technical field of disassembly and assembly tools, and provides a disassembly and assembly tool for shell-and-tube coolers. It includes a hydraulic power assembly, a positioning and clamping assembly, and a power output component. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler. The power output component contacts the tube bundle of the shell-and-tube cooler through the positioning and clamping assembly. The hydraulic power assembly is connected to the power output component, and the power provided by the hydraulic power assembly is transmitted to the tube bundle through the power output component, causing the tube bundle to produce horizontal displacement. This utility model enables rapid disassembly and assembly of shell-and-tube coolers for screw air compressors used in cigarette manufacturing.

Description

Technical Field

[0001] This application relates to the field of disassembly and assembly tools, and in particular to a disassembly and assembly tool for shell-and-tube coolers. Background Technology

[0002] Screw air compressors are crucial equipment in cigarette manufacturing, primarily used to produce compressed air to power pneumatic components. A screw air compressor mainly consists of key components such as a motor, rotor, and cooler. The cooler is a shell-and-tube type, with compressed air and cooling water flowing separately inside and outside the tube bundle. When the high-temperature compressed gas flows into the shell-and-tube cooler, the low-temperature cooling water absorbs heat through the tube bundle walls, maintaining the exhaust temperature of the compressed air at room temperature. Because the cooling tower of the screw air compressor's cooling system has an open structure, sediment in the air mixes with the cooling water and accumulates in the shell-and-tube cooler, causing blockages. This reduces heat exchange efficiency, increases exhaust temperature, and affects the stable operation of the screw air compressor. Therefore, it is necessary to periodically disassemble the cooler and remove scale, sediment, and other debris from the outer walls of the tube bundle. To ensure heat exchange efficiency, the tube bundles of the shell-and-tube cooler are mostly made of cast iron, and their long size and large number increase their weight. In addition, the shell-and-tube cooler of the cigarette manufacturer is located in the upper part of the screw air compressor structure, which is high off the ground, making disassembly and assembly difficult and posing a high safety risk. Furthermore, the shell-and-tube cooler is installed horizontally, and the tube bundle has a large mass, resulting in high friction during horizontal movement. Disassembly and assembly are time-consuming and labor-intensive, which requires the use of tools to improve work efficiency.

[0003] However, existing cleaning methods for screw air compressor coolers are applicable to air-cooled, water-cooled, and oil-cooled coolers. These methods typically involve spraying cleaning fluid or using specialized steel brushes, and require disassembling the cooling fan, cooling water inlet / outlet pipes, and oil inlet / outlet pipes during cleaning. These methods are unsuitable for cleaning shell-and-tube coolers used in cigarette manufacturing, and also do not allow for the rapid disassembly and reassembly of heavy shell-and-tube coolers. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tool for disassembling and assembling shell-and-tube coolers, which enables quick disassembly and assembly of shell-and-tube coolers for screw air compressors used in cigarette manufacturing.

[0005] To achieve the above objectives, this utility model provides a disassembly and assembly tool for a shell-and-tube cooler, including a hydraulic power assembly, a positioning and clamping assembly, and a power output component. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler. The power output component contacts the tube bundle of the shell-and-tube cooler through the positioning and clamping assembly. The hydraulic power assembly is connected to the power output component, and the power provided by the hydraulic power assembly is transmitted to the tube bundle through the power output component and pushes the tube bundle to produce horizontal displacement.

[0006] Furthermore, the positioning and clamping assembly includes a fixed disc, a claw arm, and a positioning bolt. The claw arm is fixedly mounted on the side of the fixed disc, and the positioning bolt is movably mounted in the claw arm. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler via the positioning bolt.

[0007] Furthermore, four claw arms are evenly distributed on the side of the fixed disc, and each claw arm has a slot, in which a positioning bolt is installed.

[0008] Furthermore, the fixed disc has a guide hole, and the inner wall of the guide hole is provided with an internal thread.

[0009] Furthermore, the hydraulic power assembly includes a hydraulic jack, the outer wall of which is provided with an adjusting thread. The hydraulic power assembly is rotated and fixed on a fixed disc by the engagement of the adjusting thread with the internal thread of the guide hole.

[0010] Furthermore, the hydraulic jack includes a core, and the core, cylinder body, and power output component are coaxially nested together.

[0011] Furthermore, the hydraulic power assembly also includes a small piston integrated in the top core. The pressure generated by the small piston is transmitted to the top core and amplified by the top core, then converted into a thrust toward the power output component.

[0012] Furthermore, the hydraulic power assembly also includes a pressure rod, which controls a small piston to generate pressure through its rotational movement.

[0013] Furthermore, the hydraulic power assembly also includes a bracket mounted on the top core, which is rotatably connected to the pressure rod.

[0014] Furthermore, the hydraulic power assembly also includes a locking nut mounted on the top core near the bracket.

[0015] The beneficial technical effects of this utility model are as follows:

[0016] This invention is based on Pascal's principle of hydraulic jacks. It uses a pressure rod to control a small piston to generate pressure and transmit it to the top core. The top core amplifies this pressure and converts it into a thrust towards the power output component. Under the pushing action of the power output component, the tube bundle inside the shell-and-tube cooler overcomes the sliding friction within the shell, thereby pushing the tube bundle out of the shell and achieving the purpose of disassembling the cooler.

[0017] This utility model positioning and clamping assembly utilizes the even distribution of four claw arms and movable and adjustable positioning bolts to change the contact point between the power output component and the tube bundle end face, thereby adjusting the force point of the tube bundle.

[0018] This utility model disassembly and assembly tool significantly reduces the labor intensity of maintenance personnel and improves maintenance efficiency; moreover, this utility model disassembly and assembly tool has a simple mechanical structure, which is easy to disassemble and maintain, and does not require high technical skills from maintenance personnel. Attached Figure Description

[0019] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the disassembly and assembly tools of this application after being assembled with the shell-and-tube cooler;

[0021] Figure 2 This is a schematic diagram of the structure after the fixed disk and the claw arm are assembled.

[0022] Figure Labels

[0023] 1: Pressure rod; 2: Locking nut; 3: Bracket; 4: Top core; 5: Adjustable thread; 6: Fixed disc; 7: Positioning bolt; 8: Top head; 9: Tube shell; 10: Tube bundle; 11: Claw arm. Detailed Implementation

[0024] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of this invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of this invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of this invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The present invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of this invention are for illustrative purposes only and should not be construed as limiting the scope of protection of this invention. All equivalent changes or modifications made in accordance with the spirit and essence of this invention should be covered within the scope of protection of this invention.

[0025] To better illustrate the embodiments of this utility model, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions.

[0026] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0027] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection 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 an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0028] This utility model provides a disassembly and assembly tool for a shell-and-tube cooler, including a hydraulic power assembly, a positioning and clamping assembly, and a power output component. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler. The power output component contacts the tube bundle 10 of the shell-and-tube cooler through the positioning and clamping assembly. The hydraulic power assembly is connected to the power output component, and the power provided by the hydraulic power assembly is transmitted to the tube bundle 10 through the power output component and pushes the tube bundle 10 to produce a horizontal displacement.

[0029] Furthermore, this application utilizes a hydraulic power assembly to provide stable thrust. Under the force transmission of the power output component, it can quickly push the tube bundle 10 to produce horizontal displacement, making it suitable for disassembling large tube bundles 10. A positioning and clamping assembly is used to achieve precise positioning and clamping, ensuring contact between the power output component and the tube bundle 10, further improving the stability of the disassembly process. Compared to traditional disassembly methods that require multiple people to work together, the disassembly and assembly tools of this application significantly reduce the labor intensity of maintenance personnel and improve maintenance efficiency. Moreover, this application utilizes a hydraulic power assembly to dynamically adjust the output thrust according to the resistance of the tube bundle 10, preventing overload damage to the shell-and-tube cooler, and providing higher operational controllability.

[0030] Furthermore, such as Figure 1 As shown, the hydraulic power assembly of this application includes a hydraulic jack, which utilizes Pascal's principle to amplify force. Specifically, the hydraulic jack includes a core 4, which, along with the cylinder and power output component, is coaxially nested together; it also includes a small piston (not shown in the figure) integrated in the core 4, whose pressure is transmitted to the core 4 and amplified by the core 4 to be converted into a thrust toward the power output component; it also includes a pressure rod 1, which controls the pressure generated by the small piston through its rotational movement; it also includes a bracket 3 mounted on the core 4, which is rotatably connected to the pressure rod 1; and a locking nut 2 mounted on the core 4 near the bracket 3. More specifically, this application converts the rotational motion of the pressure rod 1 into the linear motion of the small piston through the lever action of the bracket 3, forming the initial mechanical energy input. For example, if the operator applies a force of 20N to the pressure rod 1, and the lever action is amplified by 10 times, the small piston generates a force of 300N. At this time, the small piston compresses the sealed oil in the bottle, converting the mechanical energy into the pressure energy of the oil. Due to the incompressibility of the liquid, the pressure energy is efficiently transmitted to the top core 4. According to Pascal's principle, the pressure generated by the small piston will be transmitted to the top core 4 in equal measure. However, since the area of ​​the top core 4 is larger than that of the small piston, a secondary amplification of the force can be achieved based on the area ratio. For example, if the area of ​​the top core 4 is 20 times that of the small piston, then the top core 4 will amplify the force by 20 times. If the small piston inputs a force of 300N, the top core 4 will output a force of 6000N. At the same time, due to the coaxial nesting of the top core 4, the bottle body, and the power output component, the consistency of the thrust direction can be ensured, reducing energy loss and forming a unidirectional pressure transmission path. In addition, the locking nut 2 can fix the connection point between the bracket 3 and the pressure rod 1, prevent the structure from loosening during hydraulic operation, and ensure the stability of force transmission.

[0031] Furthermore, the power output component in this application is the mandrel 8. Specifically, the end of the mandrel 4 that contacts the tube bundle 10 is the mandrel 8 referred to in this application, i.e., the power output component. Both the mandrel 8 and the small piston are integrated into the mandrel 4, avoiding the complex structure of independently installing the power output component and the small piston. This results in a smaller overall size and is more suitable for disassembly and assembly scenarios where space is limited at the end face of a shell-and-tube cooler. Moreover, the pressure generated by the small piston is amplified through the mandrel 4 and directly transmitted to the mandrel 8, resulting in lower hydraulic energy loss and allowing the mandrel 8 to obtain greater thrust.

[0032] Furthermore, such as Figure 1 and Figure 2 As shown, the positioning and clamping assembly includes a fixed disk 6, jaw arms 11, and positioning bolts 7. The jaw arms 11 are fixedly mounted on the side of the fixed disk 6, and the positioning bolts 7 are movably mounted in the jaw arms 11. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler via the positioning bolts 7. Specifically, this application preferably uses four jaw arms 11, which are evenly distributed on the side of the fixed disk 6 to ensure that the clamping force is evenly transmitted in the circumferential direction and that the clamping force is evenly applied to the end face of the cooler, avoiding stress concentration on one side and improving the anti-eccentric load capacity of the positioning and clamping assembly. Even if there is axial displacement when the tube bundle 10 is disassembled, the coaxiality of the tool and the cooler can still be maintained. The jaw arms 11 of this application are provided with elongated slots, which allow the positioning bolts 7 to be installed in the slots and to move along the slots. By adjusting the relative position of the positioning bolts 7 and the jaw arms 11, the contact point between the power output component and the end face of the tube bundle 10 can be changed, thereby adjusting the force point of the tube bundle 10.

[0033] Furthermore, such as Figure 1 As shown, the fixed disc 6 has a guide hole (not shown in the figure), and the inner wall of the guide hole is provided with an internal thread. The outer wall of the hydraulic jack is provided with an adjusting thread 5, and the hydraulic power component is rotated and fixed on the fixed disc 6 through the cooperation of the adjusting thread 5 and the internal thread of the guide hole.

[0034] Furthermore, the manufacturing and usage methods of the disassembly and assembly tools in this application are as follows:

[0035] This application first manufactures a metal disc as a fixed disc 6, and drills a hole at the center of the fixed disc 6 as a guide hole and internal threads are machined on the inner wall of the guide hole; then, an adjusting thread 5 is machined on the cylinder body of the hydraulic jack to match the internal thread of the fixed disc 6; using a rigid strip plate, four claw arms 11 with slots are welded according to the size of the tube bundle 10 to facilitate the movement of the positioning bolt 7 therein, and then the four claw arms 11 are welded to the side of the fixed disc 6 respectively to manufacture the positioning clamping assembly.

[0036] After the end cover of the shell-and-tube cooler is disassembled, the positioning clamping assembly is first fixed to the appropriate position on the end flange of the shell-and-tube cooler with four positioning bolts 7. Then, the adjusting thread 5 of the hydraulic jack is rotated and fixed in the guide hole of the fixing disc 6. The pressure rod 1 is moved so that the top head 8 of the top core 4 contacts the end face of the tube bundle 10. The tube bundle 10 will slide axially in the shell 9 along with the top head 8 of the top core 4.

[0037] When the tube bundle 10 undergoes radial displacement due to gravity during movement, its axial movement is hindered. By readjusting the relative positions of the positioning bolt 7 and the chuck arm 11, the contact point between the mandrel 8 and the end face of the tube bundle 10 can be changed, thereby adjusting the stress point of the tube bundle 10. Finally, a crane is used to lift and separate the tube bundle 10 from the shell 9. After cleaning the tube bundle 10, the mandrel 8 is used to push the tube bundle 10 into the shell 9, completing the disassembly, cleaning, and installation of the shell-and-tube cooler.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tool for disassembling and assembling shell-and-tube coolers, characterized in that, It includes a hydraulic power assembly, a positioning and clamping assembly, and a power output component. The positioning and clamping assembly is detachably mounted on the end face of the shell-and-tube cooler. The power output component contacts the tube bundle (10) of the shell-and-tube cooler through the positioning and clamping assembly. The hydraulic power assembly is connected to the power output component. The power provided by the hydraulic power assembly is transmitted to the tube bundle (10) through the power output component and pushes the tube bundle (10) to produce a horizontal displacement.

2. The disassembly and assembly tool according to claim 1, characterized in that, The positioning clamping assembly includes a fixed disc (6), a claw arm (11), and a positioning bolt (7). The claw arm (11) is fixedly installed on the side of the fixed disc (6), and the positioning bolt (7) is movably installed in the claw arm (11). The positioning clamping assembly is detachably installed on the end face of the shell-and-tube cooler via the positioning bolt (7).

3. The disassembly and assembly tool according to claim 2, characterized in that, The fixed disc (6) has four claw arms (11) evenly distributed on its side. Each claw arm (11) has a slot, and the positioning bolt (7) is installed in the slot.

4. The disassembly and assembly tool according to claim 3, characterized in that, The fixed disc (6) has a guide hole, and the inner wall of the guide hole is provided with an internal thread.

5. The disassembly and assembly tool according to claim 4, characterized in that, The hydraulic power assembly includes a hydraulic jack, and the outer wall of the cylinder of the hydraulic jack is provided with an adjusting thread (5). The hydraulic power assembly is rotated and fixed on the fixed disc (6) through the cooperation of the adjusting thread (5) with the internal thread of the guide hole.

6. The disassembly and assembly tool according to claim 5, characterized in that, The hydraulic jack includes a top core (4), and the top core (4), the bottle body, and the power output component are coaxially nested together.

7. The disassembly and assembly tool according to claim 6, characterized in that, The hydraulic power assembly also includes a small piston integrated in the top core (4), the pressure generated by the small piston is transmitted to the top core (4), and after being amplified by the top core (4), it is converted into a thrust toward the power output component.

8. The disassembly and assembly tool according to claim 7, characterized in that, The hydraulic power assembly also includes a pressure rod (1), which controls the small piston to generate pressure through its rotational movement.

9. The disassembly and assembly tool according to claim 8, characterized in that, The hydraulic power assembly also includes a bracket (3) mounted on the top core (4), the bracket (3) being rotatably connected to the pressure rod (1).

10. The disassembly and assembly tool according to claim 9, characterized in that, The hydraulic power assembly also includes a locking nut (2) mounted on the top core (4) near the bracket (3).

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