Core pulling device of heat exchanger

Abstract

The utility model provides a core-pulling device for a heat exchanger, which aims to solve the technical problems of tedious core-pulling maintenance steps and inconvenience in operation of a shell-and-tube heat exchanger, and comprises a fixed support, a movable support, a movable support and a core pulling device, a first clamping assembly used for clamping a heat exchanger shell tube plate is arranged above the side, close to the heat exchanger, of the fixed platen. The sliding table is arranged above the fixed table plate, and a second clamping assembly used for clamping a heat exchanger tube bundle shell is arranged on the side, close to the heat exchanger, of the sliding table; the driving device is used for driving the sliding table to be slidably connected with the fixed table plate in the axial direction of the heat exchanger; the supporting assembly is connected between the fixed table plate and the tube bundle and is in sliding connection with the fixed table plate in the axial direction of the heat exchanger, the tube shell tube plate and the tube bundle tube plate are fixed through the first clamping assembly and the second clamping assembly respectively, the tube bundle is driven to move through the driving device, and the supporting assembly can support the tube bundle and prevent deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger repair devices, in particular to a heat exchanger core pulling device. Background Art

[0002] Heat exchangers, a common energy-saving device in industry, are widely used in the petroleum, chemical, electric power, pharmaceutical, metallurgy, refrigeration, and light industries. Shell-and-tube heat exchangers, in particular, are a widely used standard heat exchanger, characterized by a wide range of materials, strong adaptability, high processing capacity, high-temperature resistance, and easy maintenance. They dominate the heat exchanger market. Maintenance of shell-and-tube heat exchangers, especially regular overhauls, requires extracting the tube bundle from the shell for inspection, cleaning, leak repair, and even replacement. Extracting and reinstalling the tube bundle is the most labor-intensive and challenging operation during heat exchanger maintenance, requiring specialized core extraction equipment.

[0003] Shell and tube heat exchangers are the most commonly used heat exchangers. Their maintenance requires core pulling and reinstallation of the tube bundles. The operation must be carried out with the help of core pulling equipment and the cooperation of a crane. The core pulling machines on the market are generally designed and produced by professional manufacturers. The product is expensive and costly. If there are a large number of heat exchangers and frequent core pulling, it is more suitable to use a professional core pulling machine. In reality, especially in small and medium-sized enterprises, there may be problems such as a small number of heat exchangers and a long time interval between core pulling. At this time, if a core pulling machine designed and produced by a professional manufacturer is used, the cost is high, whether it is purchased or rented. Utility Model Content

[0004] The utility model provides a heat exchanger core pulling device to solve the technical problems of cumbersome core pulling and maintenance steps and inconvenient operation of shell and tube heat exchangers. In order to achieve the above purpose, the technical solutions adopted are as follows:

[0005] A heat exchanger core extraction device, characterized by comprising:

[0006] The fixed bracket is composed of a retractable support leg and a fixed plate fixedly connected to the top of the retractable support leg. A first clamping assembly for clamping the heat exchanger shell tube sheet is provided above the fixed plate close to the heat exchanger.

[0007] A sliding platform is provided above the fixed platform, and a second clamping assembly for clamping the tube bundle and shell of the heat exchanger is provided on the side of the sliding platform close to the heat exchanger;

[0008] A driving device is connected between the sliding table and the fixed platen, and is used to drive the sliding table to slide along the axial direction of the heat exchanger and connect to the fixed platen;

[0009] The support components are provided in multiple groups, and the multiple groups of support components are connected between the fixed platen and the tube bundle, and the support components are slidably connected to the fixed platen along the axial direction of the heat exchanger.

[0010] Furthermore, a guide rail is fixedly connected above the fixed platform, the length of the guide rail is distributed along the axial direction of the heat exchanger, and a sliding groove is provided at the lower end of the sliding platform to slide in cooperation with the guide rail.

[0011] Furthermore, the driving device includes a servo motor, a lead screw, and a lead screw nut. The servo motor is fixedly connected above the fixed table. The lead screw is transmission-connected to the output shaft of the servo motor. The lead screw nut is threadedly connected to the lead screw and fixedly connected to the sliding table. A through hole is provided on the sliding table for the lead screw to pass through.

[0012] Furthermore, the first clamping assembly includes a first clamping plate, a second clamping plate and a first adjustment assembly connected therebetween. The first clamping plate is fixedly connected to the top of the fixed plate, and the second clamping plate is slidably connected to the top of the fixed plate along the axial direction of the heat exchanger.

[0013] Furthermore, the first adjustment assembly includes a first adjusting bolt and a first locking nut. The length of the first adjusting bolt is distributed parallel to the axial direction of the heat exchanger. The first adjusting bolt is rotatably connected to the first clamping plate, and the movable end is threadedly connected to the second clamping plate. The first adjusting bolt and the second clamping plate are tightened and fixed by the first locking nut.

[0014] Furthermore, the second clamping assembly includes a first clamping arm and a second clamping arm distributed in the horizontal direction, and the sliding table is rotatably connected to a longitudinal adjustment screw whose length is distributed in the vertical direction. The longitudinal adjustment screw is provided with a first thread segment and a second thread segment with opposite rotation directions, and the first thread segment and the second thread segment are respectively threadedly connected with a first slider and a second slider, one end of the first clamping arm and the second clamping arm are respectively fixedly connected to the first slider and the second slider, and the other end is respectively provided with a first clamping part and a second clamping part for clamping with the tube bundle and tube shell of the heat exchanger.

[0015] Furthermore, the first clamping part and the second clamping part are both composed of a fixed plate and a movable plate, the fixed plate is fixedly connected to the first clamping arm or the second clamping arm, the movable plate is connected to the first clamping arm or the second clamping arm in an axially sliding manner along the heat exchanger, and a second adjustment component is also connected between the fixed plate and the movable plate for driving the movable plate to slide and lock along the axial direction of the heat exchanger.

[0016] Furthermore, the second adjustment assembly includes a second adjustment screw, the length of which is distributed parallel to the axial direction of the heat exchanger, the second adjustment screw is rotatably connected to the fixed plate, the movable end is threadedly connected to the movable plate, and the second adjustment screw and the movable plate are tightened and fixed by a second locking nut.

[0017] Furthermore, the support assembly includes a retractable support rod with an axis distributed in the vertical direction. The fixed part of the retractable support rod is connected to the top of the fixed platform along the axial sliding of the heat exchanger, and an arc-shaped support plate that cooperates with the lower end face of the heat exchanger tube bundle is fixedly connected above the retractable part.

[0018] Furthermore, a universal wheel is provided at the lower end of the retractable leg.

[0019] The utility model is beneficial in that:

[0020] 1. The first clamping assembly and the second clamping assembly are respectively used to fix the heat exchanger shell and tube sheet and the heat exchanger tube bundle tube sheet, and the driving device drives the sliding table and the second clamping assembly to move, so as to extract the heat exchanger tube bundle. The operation is convenient. The two can ensure that the tube bundle will not deviate when it is extracted, which is convenient for subsequent maintenance and inspection.

[0021] 2. The clamping thickness of the first clamping assembly and the second clamping assembly can be adjusted to adapt to the thickness of the shell and tube sheet and the thickness of the tube bundle tube sheet of different models of heat exchangers;

[0022] 3. By setting up the support assembly, the heat exchanger tube bundle can be supported to improve the stability of the overall structure. The support assembly can slide along the guide rail above the fixed platen to adjust the position of the support assembly to adapt to the length of the heat exchanger tube bundle of different models. At the same time, the position can be adjusted according to the position of the tube bundle to ensure that the tube bundle is evenly stressed and avoid the problem of tube bundle deformation due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the utility model

[0024] Figure 2 Top view of the connection structure of the fixed bracket, sliding table and driving device

[0025] Figure 3 A partial schematic diagram of the connection structure between the second clamp assembly and the heat exchanger tube bundle, the support assembly and the guide rail

[0026] Figure 4 Schematic diagram of the sliding table structure

[0027] in:

[0028] 1-fixed table, 2-retractable support leg, 3-universal wheel, 4-guide rail, 401-friction surface, 5-sliding table, 501-adjustment slot, 502-slide slot, 503-through hole, 6-first servo motor, 7-bearing seat, 8-screw, 9-screw nut, 10-first clamping plate, 11-second clamping plate, 12-first adjusting bolt, 13-first locking nut, 14-first clamping arm, 15-second clamping arm, 16-fixed plate, 17-movable plate, 18-second adjusting bolt, 19-second locking nut, 20-retractable support rod, 21-arc support plate, 22-locking bolt, 23-heat exchanger tube bundle tube sheet, 24-heat exchanger shell tube sheet, 25-second servo motor, 26-longitudinal adjustment screw, 27-first slider, 28-second slider. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, 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 on the utility model.

[0031] In this embodiment, for the convenience of description, the axial direction of the heat exchanger to be core-extracted is taken as the left-right direction, and the horizontal radial direction of the heat exchanger is taken as the front-back direction.

[0032] like Figure 1-Figure 3 The heat exchanger core pulling device shown includes a fixed bracket, a sliding platform 5 connected to the top of the fixed bracket for sliding left and right, a driving device for driving the sliding platform 5 to slide, and a support assembly for supporting the heat exchanger tube bundle, and the support assembly is provided with multiple groups, each group can be slidably connected to the top of the fixed bracket in the left and right directions.

[0033] Specifically, the fixed bracket consists of a fixed platform 1 and retractable legs 2. A guide rail 4 is fixedly connected to the middle of the upper end face of the fixed platform 1 in the front and rear directions. The length of the guide rail 4 is horizontally distributed in the left and right directions, and the guide rail 4 is coaxially distributed with the axis of the heat exchanger. There are four groups of retractable legs 2, which are respectively fixedly connected to the bottom of the four corners of the fixed platform 1. In this embodiment, the retractable legs 2 adopt electric hydraulic legs. In order to facilitate movement, universal wheels 3 are also installed under the retractable legs 2, and the universal wheels 3 adopt self-locking universal wheels.

[0034] The first clamping assembly is provided at the upper right end of the fixed platform 1, and the first clamping assembly includes a first clamping plate 10, a second clamping plate 11 and a first adjusting assembly connected therebetween. The first clamping plate 10 is fixedly connected to the fixed platform 1, and the lower end of the second clamping plate 11 is provided with a slide groove that cooperates with the guide rail 4 to slide, and the second clamping plate 11 can slide left and right along the length direction of the guide rail 4. Through this structure, the position of the second clamping plate 11 can be freely adjusted according to the thickness of the heat exchanger shell tube sheet 24. The first adjusting assembly includes a first adjusting bolt 12 and a first locking nut 13. The first clamping plate 10 and the second clamping plate 11 are provided with threaded holes that are distributed in corresponding positions and pass through the left and right. After the first adjusting bolt 12 passes through the threaded holes on the first clamping plate 10 and the second clamping plate 10 from right to left in sequence, the two sets of first locking nuts 13 fix the first adjusting bolt 12 and the first clamping plate 11, thereby locking the position of the first clamping plate 11 in the left and right directions.

[0035] Sliding table 5 Figures 1-4 As shown, an adjustment groove 501 is provided on the right side of the sliding table 5, a slide groove 502 is provided on the lower end surface, and through holes 503 are symmetrically provided on the front and rear parts and are distributed left and right. The slide groove 502 cooperates with the guide rail 4 to realize the sliding table 5 sliding left and right along the guide rail 4. A longitudinal adjustment screw 26 is rotatably connected in the adjustment groove 501. The axis of the longitudinal adjustment screw 26 is distributed in the vertical direction, and the upper and lower parts are respectively provided with a first thread segment and a second thread segment with opposite rotation directions. The first thread segment and the second thread segment are respectively threadedly connected with the first slider 27 and the second slider 28, and a second servo motor 25 is also provided above the sliding table 5. The output shaft of the second servo motor 25 is transmission-connected to the longitudinal adjustment screw 26. The longitudinal adjustment screw 26 can be driven to rotate by the second servo motor 25, thereby driving the first slider 27 and the second slider 28 to slide up and down to approach or move away.

[0036] like Figure 1 and Figure 2As shown, a driving device is provided between the sliding table 5 and the fixed table plate 1, which is used to drive the sliding table 5 to slide left and right along the guide rail 4. The driving device is symmetrically arranged in two groups along the axis of the heat exchanger. Each group of driving devices consists of a first servo motor 6, a screw 8, and a screw nut 9. The length of the screw 8 is distributed in a direction parallel to the axis of the heat exchanger. The middle part passes through the through hole 503 on the sliding table 5, and the left and right ends are rotatably connected to the top of the fixed table plate 1 through the bearing seat 7. The output shaft of the first servo motor 6 is coaxially fixedly connected to the screw 8. The screw nut 9 is threadedly connected to the screw 8 and fixedly connected to the left side of the lower part of the sliding table 5. The screws 8 of the two groups of driving devices have the same rotation direction and the direction of rotation of the first servo motor 6 is also the same. Through the synchronous driving of the two groups of driving devices, the screw 8 can be driven to rotate, thereby driving the screw nut 9 and the sliding table to slide in the left and right directions.

[0037] Moreover, a second clamping assembly for clamping the tube sheet of the heat exchanger tube bundle is also provided on the right side of the sliding platform 5. Figure 1-Figure 3 As shown, the second clamping assembly includes a first clamping arm 14 and a second clamping arm 15, the lengths of which are distributed horizontally to the left and right, and the left ends of the two are fixedly connected to the first slider 27 and the second slider 28 respectively, and the right ends are both equipped with a clamping portion, the clamping portion includes a fixed plate 16, a movable plate 17 and a second adjustment assembly, the fixed plate 16 is fixedly connected to the right end of the first clamping arm 14 or the second clamping arm 15, the movable plate 17 is slidably connected to the lower end of the first clamping arm 14 or the upper end of the second clamping arm 15 along the left and right directions, and, in this embodiment, the movable plate 17 is connected to the first clamping arm 14 and the second clamping arm 15 are slidably connected in the form of a slide groove and a slide rail, and the second adjustment component includes a second adjusting bolt 18 and two sets of second locking nuts 19. The fixed plate 16 and the movable plate 17 are provided with bolt holes with corresponding positions and extending left and right through the thickness direction of each plate. The second adjusting bolt 18 passes through the fixed plate 16 and the movable plate 17 from right to left in sequence and is tightened by the two sets of second locking nuts 19 located on the left and right sides of the movable plate 17, thereby fixing the position of the movable plate 17 to achieve adjustment of the spacing between the fixed plate 16 and the movable plate 17, and is suitable for heat exchanger tube sheets 23 of different thicknesses.

[0038] In addition, a support assembly is further provided above the fixed platen 1 and between the heat exchanger tube bundle, and the support assembly is provided with multiple groups along the left and right directions, and each group of support assemblies is composed of a retractable support rod 20 and an arc-shaped support plate 21. The retractable support rod 20 can adopt an electric retractable rod or a hydraulic retractable rod, which will not be described in detail in this embodiment. The lower end of the fixed portion of the retractable support rod 20 is provided with a slide groove that slides with the guide rail 4, and the side of the fixed portion is provided with a bolt hole. The locking bolt 22 passes through the bolt hole from front to back and enters the slide groove, and the end thereof contacts the surface of the guide rail 4, and is provided on the surface of the guide rail 4. A friction surface 401 is provided with a length distributed left and right in the horizontal direction, and the end of the locking bolt 22 contacts the friction surface 401. The locking bolt 22 and the guide rail 4 fix the telescopic support rod 20 in a manner that increases friction. The arc-shaped support plate 21 is fixedly connected to the upper part of the movable part of the telescopic support rod 20. Its cross-section is arc-shaped and matches the lower end face of the heat exchanger tube bundle. The support position of the heat exchanger tube bundle can be adjusted by sliding the support assembly on the guide rail 4, and its height is adjustable, so that it is suitable for different models of heat exchangers to improve its support and fixing effect and ensure that it is evenly stressed.

[0039] When using this device to pull the core of the heat exchanger, first, with the help of external tools, a certain gap is reserved in advance between the heat exchanger tube bundle tube sheet 23 and the heat exchanger tube shell and tube sheet 24, and the fixed bracket is moved to one side of the heat exchanger tube shell and tube sheet 24 to ensure that the first clamping assembly corresponds to the position of the heat exchanger tube shell and tube sheet 24, that is, the first clamping plate 10 and the second clamping plate 11 are respectively located on the left and right sides of the heat exchanger tube shell and tube sheet 24, and the universal wheel is locked; then the height is adjusted by the retractable support leg 2, driving the upper end of the first clamping assembly to be higher than the bottom end of the heat exchanger tube shell and tube sheet 24, and the heat exchanger tube shell and tube sheet 24 is clamped by the first adjusting bolt 12 and the first locking nut 13; then, the first clamping arm 1 is driven by the second servo motor 25 4 and the second clamping arm 15 move toward each other, and clamp the tube sheet 23 of the heat exchanger tube bundle through the clamping parts at their right ends, and drive the sliding platform 5 to move to the left through the first servo motor 6 until the heat exchanger tube bundle is pulled out. It should be noted that when adjusting the height of the fixed bracket and the second clamping assembly, it is necessary to ensure that the first clamping part and the second clamping part are symmetrically distributed along the axis of the heat exchanger; finally, place the support assembly on the guide rail 4, and adjust the position of each support assembly according to the length of the heat exchanger tube bundle. After the adjustment is completed, the retractable support rod 20 drives the arc-shaped support plate 22 upward to fit tightly against the lower surface of the heat exchanger tube bundle, completing the support of the heat exchanger tube bundle. After the support is fixed, subsequent maintenance and inspection can be carried out.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A heat exchanger core extraction device, characterized in that: include: The fixed bracket is composed of a retractable support leg and a fixed plate fixedly connected to the top of the retractable support leg. A first clamping assembly for clamping the heat exchanger shell tube sheet is provided above the fixed plate close to the heat exchanger. A sliding platform is provided above the fixed platform, and a second clamping assembly for clamping the tube bundle and shell of the heat exchanger is provided on the side of the sliding platform close to the heat exchanger; A driving device is connected between the sliding table and the fixed platen, and is used to drive the sliding table to slide along the axial direction of the heat exchanger and connect to the fixed platen; The support components are provided in multiple groups, and the multiple groups of support components are connected between the fixed platen and the tube bundle, and the support components are slidably connected to the fixed platen along the axial direction of the heat exchanger.

2. The heat exchanger core pulling device according to claim 1, characterized in that: A guide rail is fixedly connected above the fixed platform, and the length of the guide rail is distributed along the axial direction of the heat exchanger. A sliding groove that slides in cooperation with the guide rail is provided at the lower end of the sliding platform.

3. The heat exchanger core pulling device according to claim 2, characterized in that: The driving device includes a servo motor, a screw, and a screw nut. The servo motor is fixedly connected above the fixed table. The screw is transmission-connected to the output shaft of the servo motor. The screw nut is threadedly connected to the screw and fixedly connected to the sliding table. The sliding table is provided with a through hole for the screw to pass through.

4. The heat exchanger core pulling device according to claim 1, characterized in that: The first clamping assembly includes a first clamping plate, a second clamping plate and a first adjustment assembly connected therebetween. The first clamping plate is fixedly connected to the top of the fixed plate, and the second clamping plate is slidably connected to the top of the fixed plate along the axial direction of the heat exchanger.

5. The heat exchanger core pulling device according to claim 4, characterized in that: The first adjustment assembly includes a first adjustment bolt and a first locking nut. The length of the first adjustment bolt is distributed parallel to the axial direction of the heat exchanger. The first adjustment bolt is rotatably connected to the first clamping plate, and the movable end is threadedly connected to the second clamping plate. The first adjustment bolt and the second clamping plate are tightened and fixed by the first locking nut.

6. The heat exchanger core pulling device according to claim 1, characterized in that: The second clamping assembly includes a first clamping arm and a second clamping arm distributed in the horizontal direction. The sliding platform is rotatably connected to a longitudinal adjustment screw whose length is distributed in the vertical direction. The longitudinal adjustment screw is provided with a first thread segment and a second thread segment with opposite rotation directions. The first thread segment and the second thread segment are respectively threadedly connected to the first slider and the second slider. One end of the first clamping arm and the second clamping arm is respectively fixedly connected to the first slider and the second slider, and the other end is respectively provided with a first clamping part and a second clamping part for cooperating with the tube bundle and the tube shell of the heat exchanger.

7. The heat exchanger core pulling device according to claim 6, characterized in that: The first clamping part and the second clamping part are both composed of a fixed plate and a movable plate. The fixed plate is fixedly connected to the first clamping arm or the second clamping arm. The movable plate is connected to the first clamping arm or the second clamping arm in an axially sliding manner along the heat exchanger. A second adjustment component is also connected between the fixed plate and the movable plate to drive the movable plate to slide and lock along the axial direction of the heat exchanger.

8. The heat exchanger core pulling device according to claim 7, characterized in that: The second adjustment assembly includes a second adjustment screw, the length of which is distributed parallel to the axial direction of the heat exchanger, the second adjustment screw is rotatably connected to the fixed plate, the movable end is threadedly connected to the movable plate, and the second adjustment screw and the movable plate are tightened and fixed by a second locking nut.

9. The heat exchanger core pulling device according to claim 1, characterized in that: The support assembly includes a retractable support rod with an axis distributed in the vertical direction. The fixed part of the retractable support rod is connected to the top of the fixed platform along the axial sliding of the heat exchanger, and an arc-shaped support plate that cooperates with the lower end surface of the heat exchanger tube bundle is fixedly connected above the retractable part.

10. The heat exchanger core pulling device according to claim 1, characterized in that: The lower end of the telescopic leg is provided with a universal wheel.

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