A tightening and dismounting tool for a threaded locking ring in a heat exchanger

Abstract

The utility model discloses a kind of tightening dismounting tool for threaded locking ring in heat exchanger, belong to the assembly or dismounting tool technical field of metal parts, including first connecting plate for being detachably connected with threaded locking ring;The first connecting plate side coaxial second connecting plate is set, and the second connecting plate is detachably connected with first connecting plate;The end of second connecting plate away from first connecting plate is coaxially fixedly arranged with rotating shaft;Rotary fit has lifting lug on the rotating shaft between the lifting lug and second connecting plate, and spanner assembly is arranged on the rotating shaft. In the utility model, the connection between first connecting plate and rotating shaft is realized by second connecting plate, for the tightening dismounting of threaded locking ring on different specifications heat exchanger, only need to replace corresponding specification first connecting plate, remaining components can be reused, do not need to replace whole set of tool, reduce the manufacturing cost of tool.

Description

Technical Field

[0001] This utility model belongs to the technical field of assembly or disassembly tooling for metal parts, specifically relating to a tightening and disassembly tooling for a threaded locking ring in a heat exchanger. Background Technology

[0002] The threaded locking ring heat exchanger is a special heat exchange equipment designed for high-temperature and high-pressure conditions in petroleum refining hydrogenation units. It adopts an integral welded structure of tube box and shell, and achieves multi-layer sealing through the pre-tightening force of inner and outer double-ring bolts, eliminating the traditional flange connection method, and bearing the operating pressure through the threaded locking ring.

[0003] In threaded locking ring heat exchangers, tightening or loosening the threaded locking ring is a crucial part of manufacturing and maintenance. Currently, this is achieved using appropriate assembly and disassembly fixtures. However, with existing fixtures, for different heat exchanger specifications, a complete assembly and disassembly device compatible with the threaded locking ring specifications is required, thus increasing the manufacturing cost of the fixtures. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a tightening and disassembling tool for threaded locking rings in heat exchangers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A tightening and unloading tooling for a threaded locking ring in a heat exchanger includes a first connecting plate for detachable connection with the threaded locking ring; A second connecting plate is coaxially disposed on one side of the first connecting plate, and the second connecting plate is detachably connected to the first connecting plate; A rotating shaft is coaxially fixed at one end of the second connecting plate opposite to the first connecting plate; A lifting lug is rotatably fitted on the rotating shaft, and a wrench assembly is provided on the rotating shaft between the lifting lug and the second connecting plate.

[0006] Preferably, the second connecting plate and the first connecting plate are detachably connected by the first bolt.

[0007] Preferably, a plurality of reinforcing ribs are uniformly fixed along the circumferential direction on the end face of the second connecting plate facing away from the first connecting plate, and the reinforcing ribs extend along the radial direction of the second connecting plate. The radial inner end of the reinforcing rib is fixedly connected to the outer wall of the rotating shaft.

[0008] Preferably, the wrench assembly includes several support columns evenly fixed on the rotating shaft along the circumferential direction and several steel pipes of different lengths that can be inserted into the support columns. The central axis of the support column intersects perpendicularly with the central axis of the rotating shaft.

[0009] Preferably, the first connecting plate is provided with a plurality of perforated holes evenly distributed along the circumferential direction.

[0010] Preferably, the rotating shaft has a hollow structure.

[0011] Preferably, the end of the rotating shaft away from the second connecting plate is sealed with a cover plate, and the cover plate is provided with an end lifting lug.

[0012] Preferably, a bearing is provided between the rotating shaft and the lifting lug.

[0013] Preferably, a counterweight assembly is detachably provided on the rotating shaft. The counterweight assembly includes several annular counterweights of different weights, and all annular counterweights have the same outer diameter and the same inner diameter.

[0014] Preferably, the counterweight assembly is detachably connected to the rotating shaft via two positioning clamps.

[0015] The beneficial effects of this utility model are: (1) In this utility model, the connection between the first connecting plate and the rotating shaft is realized by the second connecting plate. For the tightening and disassembly of the threaded locking ring on heat exchangers of different specifications, only the first connecting plate of the corresponding specification needs to be replaced. The other parts can be reused. There is no need to replace the whole set of tooling, which reduces the manufacturing cost of tooling.

[0016] (2) When using the tooling of this utility model to install, tighten or remove the threaded locking ring, before turning the wrench assembly, select a steel pipe of appropriate length and insert it into the support column to achieve the purpose of saving effort.

[0017] (3) In this utility model, the first connecting plate adopts a hollow design, which can reduce the weight, thereby reducing the weight of the counterweight component and saving tooling costs.

[0018] (4) In this utility model, the rotating shaft is a hollow structure, which can reduce the weight of the tooling.

[0019] (5) In this utility model, the reinforcing ribs between the second connecting plate and the rotating shaft and the end cover plate of the rotating shaft enhance the strength of the tooling. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] Figure 1 This is a schematic diagram of the tightening and disassembly fixture for the threaded locking ring in the heat exchanger of this utility model; Figure 2 yes Figure 1 Sectional view along axis AA; Figure 3 yes Figure 1 BB-direction cross-section Figure 4 This is a schematic diagram of the cooperation between the support column and the rotating shaft in this utility model; Figure 5 This is a schematic diagram of the fit between the lifting lug and the rotating shaft in this utility model; in: 01. Threaded locking ring; 02. Heat exchanger gland; 03. Heat exchanger shell; 1. First connecting plate; 11. Second bolt; 12. Third bolt; 13. Hollow hole; 2. Second connecting plate; 21. Reinforcing rib; 3. Rotating shaft; 31. Cover plate; 32. End lifting lug; 4. Lifting lug; 41. Bearing; 5. First bolt; 6. Support column; 7. Counterweight assembly; 8. Positioning clamp. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-5 As shown, a tightening and disassembling tool for a threaded locking ring in a heat exchanger includes a first connecting plate 1 for alkaline detachable connection with the threaded locking ring 01. The first connecting plate 1 is connected to the threaded locking ring 01 by a plurality of second bolts 11 located on the outer ring, and the first connecting plate 1 is connected to the heat exchanger cover 02 inside the threaded locking ring 01 by a plurality of third bolts 12 located on the inner ring. A second connecting plate 2 is coaxially disposed on one side of the first connecting plate 1, and the second connecting plate 2 is detachably connected to the first connecting plate 1; A rotating shaft 3 is coaxially fixed at one end of the second connecting plate 2 facing away from the first connecting plate 1; specifically, the rotating shaft 3 is welded to the second connecting plate 2. A lifting lug 4 is rotatably fitted on the rotating shaft 3, and a wrench assembly is provided on the rotating shaft 3 between the lifting lug 4 and the second connecting plate 2.

[0024] Preferably, the second connecting plate 2 and the first connecting plate 1 are detachably connected by the first bolt 5.

[0025] Specifically, the second connecting plate 2 and the first connecting plate 1 are detachably connected by a number of first bolts 5 evenly distributed along the circumference.

[0026] Preferably, a plurality of reinforcing ribs 21 are uniformly fixed along the circumferential direction on the end face of the second connecting plate 2 facing away from the first connecting plate 1, and the reinforcing ribs 21 extend along the radial direction of the second connecting plate 2. The radial inner end of the reinforcing rib 21 is fixedly connected to the outer wall of the rotating shaft 3.

[0027] The reinforcing rib 21 is welded to the second connecting plate 2 and the rotating shaft 3. In addition, each of the first bolts 5 is respectively set on the second connecting plate 2 in the middle of the adjacent reinforcing rib 21.

[0028] Preferably, the rotating shaft 3 has a hollow structure to reduce the weight of the tooling.

[0029] Preferably, the end of the rotating shaft 3 away from the second connecting plate 2 is sealed with a cover plate 31, and the cover plate 31 is provided with an end lug 32.

[0030] The end lifting lug 32 facilitates the auxiliary lifting of the tooling.

[0031] Preferably, a bearing 41 is provided between the rotating shaft 3 and the lifting lug 4 to achieve rotational engagement.

[0032] Preferably, a counterweight assembly 7 is detachably provided on the rotating shaft 3. The counterweight assembly 7 includes several annular counterweight blocks with different weights, and all annular counterweight blocks have the same outer diameter and the same inner diameter.

[0033] The weights of the various ring-shaped counterweights are set in a gradient. Several ring-shaped counterweights with appropriate weights are selected according to the actual situation to form the counterweight assembly 7.

[0034] Preferably, the counterweight assembly 7 is detachably connected to the rotating shaft 3 via two positioning clips 8.

[0035] In use, select several annular counterweights of appropriate weight according to the actual situation to form a counterweight assembly 7. The counterweight assembly 7 is then threaded onto the rotating shaft 3, and clamped on both sides using positioning clamps 8. After the first connecting plate 1 is connected to the threaded locking ring 01 and the heat exchanger cover 02, the counterweight assembly 7 ensures the balance of the entire device when the tooling is lifted using the lifting lugs 4, keeping the rotating shaft 3 horizontal.

[0036] Among them, the positioning clamp 8 is existing technology. For example, it can adopt a structure in which a positioning ring and a locking bolt are used. The positioning ring is sleeved on the rotating shaft 3, and several locking bolts are set on the positioning ring along the circumferential direction. The locking bolts extend along the radial direction of the positioning ring. Tightening the locking bolts will cause their ends to press against the side wall of the rotating shaft 3 to achieve a detachable and fastened connection between the positioning ring and the rotating shaft 3. Alternatively, it can adopt a structure in which two semi-annular tube clamps are used in conjunction with connecting bolts. The two semi-annular tube clamps are sleeved on the rotating shaft 3, and the two ends are connected by connecting bolts. Tightening the connecting bolts will achieve the clamping of the rotating shaft 3 by the two semi-annular tube clamps.

[0037] When installing and tightening the threaded locking ring 01 in the heat exchanger using the tightening and disassembly tool in Example 1, the second bolt 11 on the first connecting plate 1 is threaded into the bolt hole on the threaded locking ring 01, and the third bolt 12 on the first connecting plate 1 is threaded into the bolt hole on the heat exchanger cover 02. Then, according to the actual situation, several annular counterweights of appropriate weight are selected to form a counterweight assembly 7. The counterweight assembly 7 is threaded onto the rotating shaft 3, and clamped on both sides using positioning clamps 8. The entire device is lifted using a lifting tool via the lifting lug 4. During lifting, the counterweight assembly 7 is set to keep the rotating shaft 3 horizontal. The threaded locking ring 01 and the heat exchanger cover 02 are brought close to the horizontally placed heat exchanger shell 03 using the lifting tool. The height of the rotating shaft 3 is adjusted using the lifting tool to make the threaded locking ring 01 coaxial with the heat exchanger shell 03. Then, the wrench assembly is rotated to screw the threaded locking ring 01 and the heat exchanger cover 02 into the heat exchanger shell 03. After tightening, remove the second bolt 11 from the threaded locking ring 01 and remove the third bolt 12 from the heat exchanger cover 02.

[0038] When disassembling the threaded locking ring 01 in the heat exchanger using the tightening disassembly tool in Example 1, the lifting lug 4 is connected to the hoisting tool, which then hoists the tool close to the threaded locking ring 01. The second bolt 11 on the first connecting plate 1 is threaded into the bolt hole on the threaded locking ring 01, and the third bolt 12 on the first connecting plate 1 is threaded into the bolt hole on the heat exchanger cover 02. Then, several annular counterweights of appropriate weight are selected according to the actual situation to form a counterweight assembly 7. The counterweight assembly 7 is threaded onto the rotating shaft 3, and clamped on both sides using positioning clamps 8. Then, the wrench assembly is rotated to unscrew the threaded locking ring 01 and the heat exchanger cover 02 from the heat exchanger cylinder 03.

[0039] In this application, the connection between the first connecting plate 1 and the rotating shaft 3 is achieved through the second connecting plate 2. For tightening and loosening of the threaded locking ring 01 on heat exchangers of different specifications, only the first connecting plate 1 of the corresponding specification needs to be replaced. The other parts can be reused, and there is no need to replace the entire tooling, which reduces the manufacturing cost of the tooling.

[0040] Example 2: Based on Example 1, such as Figure 4 As shown, the wrench assembly includes several support columns 6 evenly fixed on the rotating shaft 3 along the circumferential direction, and several steel pipes of different lengths that can be inserted into the support columns 6. The central axis of the support column 6 intersects perpendicularly with the central axis of the rotating shaft 3.

[0041] In actual use, steel pipes of different lengths are selected according to the actual stress level to achieve the purpose of saving effort.

[0042] When installing, tightening or removing the threaded locking ring 01, based on the method in Example 1, before turning the wrench assembly, a steel pipe of appropriate length is inserted into the support column 6 to achieve the purpose of saving effort.

[0043] Example 3: Based on Example 1 or Example 2, such as Figure 2 As shown, the first connecting plate 1 has a plurality of perforated holes 13 evenly arranged along the circumferential direction to reduce weight.

[0044] The second bolt 11 is located on the radial outer side of the hollow hole 13, and the third bolt 12 is located on the radial inner side of the hollow hole 13.

[0045] In this application, the first connecting plate 1 adopts a hollow design, which can reduce weight and thus reduce the weight of the counterweight component 7, saving tooling costs.

[0046] In addition, all bolts involved in this application are equipped with nuts.

[0047] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, they are not intended to limit the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the protection scope of the present utility model.

Claims

1. A tightening and disassembling fixture for a threaded locking ring in a heat exchanger, comprising a first connecting plate (1) for detachably connecting to the threaded locking ring (01); characterized in that, A second connecting plate (2) is coaxially disposed on one side of the first connecting plate (1), and the second connecting plate (2) is detachably connected to the first connecting plate (1); The second connecting plate (2) has a rotating shaft (3) fixedly mounted coaxially at one end facing away from the first connecting plate (1); A lifting lug (4) is rotatably fitted on the rotating shaft (3), and a wrench assembly is provided on the rotating shaft (3) between the lifting lug (4) and the second connecting plate (2).

2. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, The second connecting plate (2) and the first connecting plate (1) are detachably connected by the first bolt (5).

3. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, A plurality of reinforcing ribs (21) are uniformly fixed along the circumferential direction on the end face of the second connecting plate (2) facing away from the first connecting plate (1), and the reinforcing ribs (21) extend along the radial direction of the second connecting plate (2). The radial inner end of the reinforcing rib (21) is fixedly connected to the outer wall of the rotating shaft (3).

4. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, The wrench assembly includes several support columns (6) uniformly fixed on the rotating shaft (3) along the circumferential direction, and several steel pipes of different lengths that can be inserted into the support columns (6); The central axis of the support column (6) intersects perpendicularly with the central axis of the rotating shaft (3).

5. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, The first connecting plate (1) has several hollow holes (13) evenly arranged along the circumferential direction.

6. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, The rotating shaft (3) has a hollow structure.

7. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 6, characterized in that, The end of the rotating shaft (3) away from the second connecting plate (2) is sealed with a cover plate (31), and the cover plate (31) is provided with an end lug (32).

8. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, A bearing (41) is provided between the rotating shaft (3) and the lifting lug (4).

9. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 1, characterized in that, The rotating shaft (3) is detachably provided with a counterweight assembly (7), which includes several ring-shaped counterweights of different weights, all of which have the same outer diameter and inner diameter.

10. The tightening and disassembly fixture for the threaded locking ring in the heat exchanger as described in claim 9, characterized in that, The counterweight assembly (7) is detachably connected to the rotating shaft (3) via two positioning clips (8).

Images