Graphite heat exchanger welding equipment

Abstract

The invention relates to the technical field of welding equipment, and discloses graphite heat exchanger welding equipment which comprises a bottom plate, a three-jaw chuck capable of positioning the lower end of a tube shell is fixedly installed on the bottom plate, two limiting rods and a fixing frame are fixedly installed on the bottom plate, and an annular rail is movably installed between the two limiting rods and the fixing frame. The annular track is located over the three-jaw chuck, a driving assembly capable of driving the annular track to move up and down is arranged on the fixing frame, a welding mechanism is arranged on the annular track, the annular track comprises a first arc-shaped track and a second arc-shaped track, and one end of the first arc-shaped track is hinged to one end of the second arc-shaped track through a hinge. Two fixing rods are fixedly installed on the first arc-shaped track, and inserting holes matched with the two limiting rods are formed in the ends of the two fixing rods. The welding device aims at solving the problem that at present, when a round pipeline shell of a shell-and-tube heat exchanger is welded manually, the welding precision is low.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding equipment, and particularly relates to a graphite heat exchanger welding equipment. BACKGROUND

[0002] The graphite heat exchanger is a heat exchange equipment made of impermeable graphite as a heat transfer component, and is mainly applied to the heat exchange scene of strong corrosive media such as hydrochloric acid, sulfuric acid and acetic acid, and plays an important role in the fields of chlor-alkali chemical industry and petroleum chemical industry. The manufacturing materials thereof are divided into two categories of impregnation type (synthetic resin, water glass resin and pitch impregnation) and profiled graphite, and high efficient heat transfer is realized through the high thermal conductivity and corrosion resistance of graphite. The graphite heat exchanger can be divided into three types of block hole type, tube shell type and plate type according to its structure, wherein the tube shell type heat exchanger occupies an important position in the graphite heat exchanger. The tube shell type heat exchanger is a wall surface of a tube bundle enclosed in a shell as a heat transfer surface. The heat exchanger structure is relatively simple, the operation is reliable, various structural materials (mainly metal materials) can be used for manufacturing, and the heat exchanger can be used at high temperature and high pressure, so it is the most widely used type.

[0003] The tube shell type heat exchanger needs to weld each part after the production of each part is completed, but when the circular pipe is welded, the cutting precision of the pipe needs to be strictly required, and in order to prevent the circular pipe from shaking during welding, the circular pipe is mostly fixed by manual pressing, and then welded, but the circular pipe will shake during manual pressing, thereby affecting the precision of the circular pipe during welding. Therefore, the graphite heat exchanger welding equipment is proposed to solve the above problems. SUMMARY

[0004] The purpose of the present application is to solve the problem of low welding precision when the circular pipe shell of the tube shell type heat exchanger is welded by manual operation.

[0005] In order to achieve the above technical purpose, the technical scheme adopted by the present application is as follows:

[0006] A graphite heat exchanger welding equipment, comprising a bottom plate, a three-jaw chuck capable of positioning the lower end of the tube shell is fixedly installed on the bottom plate, two limiting rods and a fixed frame are fixedly installed on the bottom plate, an annular track is movably installed between the two limiting rods and the fixed frame, the annular track is located directly above the three-jaw chuck, a driving assembly capable of driving the annular track to move up and down is arranged on the fixed frame, and a welding mechanism is arranged on the annular track.

[0007] Further limited, the annular track comprises a first arc-shaped track and a second arc-shaped track, one end of the first arc-shaped track and the second arc-shaped track are hinged to each other by a hinge, and the other end is provided with a socket and a plug, two fixed rods are fixedly installed on the first arc-shaped track, and the end portions of the two fixed rods are provided with plug holes matched with two limiting rods. Such a structure design, the first arc-shaped track and the second arc-shaped track are hinged at one end and locked by the socket and the plug at the other end, so that the tube shell of the heat exchanger can be placed in the annular track.

[0008] Further limited, a connecting rod is fixedly installed on the first arc-shaped track, a sliding block is fixedly installed at the end of the connecting rod, the driving assembly comprises a driving motor fixedly installed at the upper end of a fixed frame and a threaded rod fixedly installed on the output shaft of the driving motor, a sliding groove is formed in the fixed frame, the sliding block is slidingly installed in the sliding groove, and the end of the threaded rod penetrates into the sliding groove and is threadedly connected with the sliding block. Such a structure design, when the driving motor works, the output shaft drives the threaded rod to rotate, and the sliding block will move vertically up and down along the sliding groove under the action of the threaded rod, thereby driving the annular track to move up and down.

[0009] Further limited, the welding mechanism comprises a movable seat, a movable clamping block fixedly installed at the lower end of the movable seat, and a welding gun arranged on the movable seat, the movable seat is arranged at the upper end of the annular track, and the movable clamping block is movably clamped in the annular track. Such a structure design, when the movable seat moves along the annular track, the welding gun can perform welding work along the annular track.

[0010] Further limited, a fixed block is fixedly installed at the lower end of the movable seat, a rotating wheel driven by a motor is rotatably installed on the fixed block, and the rotating wheel is in contact with the inner side of the annular track. Such a structure design, when the rotating wheel rotates, it will drive the entire movable seat to move at a constant speed along the annular track, and the welding is more regular.

[0011] Further limited, a through hole is formed in the fixed block, a handle end of the welding gun is movably inserted into the through hole, and an adjusting assembly is arranged on the fixed block and can adjust the extension length of the welding gun according to the arc surface of the outer wall of the heat exchanger tube shell. Such a structure design, the adjusting assembly can automatically make the gun head part of the welding gun close to the outer wall of the tube shell, which is convenient for subsequent welding work.

[0012] Further limited, the adjusting assembly comprises a fixed seat, a movable rod, a fixed convex ring, a compression spring, a rotating end and a poking bar, the fixed seat is fixedly installed on one side of the fixed block, a slot is formed in the fixed seat, the movable rod is movably inserted into the slot, the fixed convex ring is fixedly installed on the movable rod, the compression spring is sleeved on the movable rod and located between the fixed convex ring and the fixed seat, the rotating end is rotatably installed on one end of the movable rod, and the poking bar is fixedly installed on the other end of the movable rod, the end of the poking bar is provided with a U-shaped opening and an arc-shaped opening vertically penetrating the U-shaped opening, and two positioning columns are symmetrically fixedly installed on the handle of the welding gun and movably installed in the arc-shaped opening. Such a structure design, under the action of the compression spring, the rotating end at the end of the movable rod is tightly attached to the outer wall of the heat exchanger pipe shell, the movable rod is telescopic with the shape of the outer wall of the pipe shell, and the welding gun is driven by the poking bar to make corresponding telescopic movement, so that the distance between the welding gun and the workpiece can be automatically adjusted.

[0013] Further limited, the rotating end is composed of an adapter seat and a roller, the adapter seat is rotatably connected with the movable rod, the roller is made of rubber, and the outer side of the roller is coated with dust-sticking glue. Such a structure design, after the roller contacts the outer wall of the pipe shell, the dust-sticking glue can stick the dust on the outer wall of the pipe shell, thereby improving the welding efficiency.

[0014] Further limited, a limiting convex strip is arranged on the movable rod along the direction of the movable rod, and a limiting groove matched with the limiting convex strip is arranged on the slot wall. Such a structure design, the limiting convex strip cooperates with the limiting groove to ensure the stability of the movable rod during movement.

[0015] The application adopting the above technical scheme has the following advantages:

[0016] 1. According to the application, after the heat exchanger pipe shell is fixed by the three-jaw chuck, the welding mechanism can be guided by the annular track to weld the pipe shell along the annular track, and the driving assembly can drive the annular track and the welding mechanism to move vertically up and down, so that the welding height can be adjusted conveniently, and the welding precision is improved.

[0017] 2. According to the application, when the movable seat moves along the annular track, the rotating end at the end of the movable rod contacts and rolls on the outer wall of the pipe shell, the movable rod drives the welding gun to make corresponding telescopic movement through the poking bar when the movable rod telescopes on the fixed seat, so that the distance between the end of the welding gun and the pipe shell is adjusted to the best, and the welding work can be automatically performed according to the shape or size of the pipe shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the purpose, technical scheme and advantages of the application clearer, the preferred detailed description of the application will be given below in combination with the drawings, in which:

[0019] Figure 1 It is a structural schematic view of a graphite heat exchanger welding equipment of the present application;

[0020] Figure 2 It is a structural schematic view of a ring track and a driving assembly part in a graphite heat exchanger welding equipment of the present application;

[0021] Figure 3 It is a structural schematic view of a ring track part in a graphite heat exchanger welding equipment of the present application;

[0022] Figure 4 It is a structural schematic view of a welding mechanism part in a graphite heat exchanger welding equipment of the present application;

[0023] Figure 5 It is a structural schematic view of a welding mechanism in use in a graphite heat exchanger welding equipment of the present application;

[0024] Figure 6 It is Figure 5 An enlarged structural schematic view of A in the middle.

[0025] The main element symbol explanations are as follows:

[0026] 1, bottom plate; 2, three-jaw chuck; 3, limiting rod; 4, fixed frame;

[0027] 5, ring track; 51, socket; 52, plug; 53, fixed rod;

[0028] 54, connecting rod; 541, sliding block;

[0029] 6, driving motor; 61, threaded rod;

[0030] 7, movable seat; 71, movable clamping block;

[0031] 72, welding torch; 721, positioning column;

[0032] 73, fixed block; 731, rotating wheel;

[0033] 8, fixed seat; 81, movable rod; 82, fixed convex ring; 83, compression spring; 84, rotating end;

[0034] 85, push bar; 851, U-shaped opening; 852, arc-shaped opening. DETAILED DESCRIPTION

[0035] The present application is illustrated by way of specific examples below, which are provided for the purpose of explanation only and should not be construed as limiting the present application in any way. Other advantages and novel features of the present application will become apparent to those skilled in the art from the following detailed description, which, when taken in conjunction with the drawings, describes the principles of the application. The description below, as well as the examples, are intended to illustrate the present application and should not be construed as limiting the scope of the present application. The drawings are provided for illustrative purposes only and should not be construed as limiting the present application. Certain components in the drawings may be omitted, enlarged or reduced for better illustration of the embodiments of the present application, and do not represent the actual size of the product. It is understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the drawings.

[0036] The drawings are provided for illustrative purposes only and should not be construed as limiting the present application. Certain components in the drawings may be omitted, enlarged or reduced for better illustration of the embodiments of the present application, and do not represent the actual size of the product. It is understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the drawings.

[0037] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components. In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as limiting the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] As shown in Figures 1-6 The present application provides a graphite heat exchanger welding equipment, which comprises a base plate 1, a three-jaw chuck 2 fixedly installed on the base plate 1 and capable of positioning the lower end of the tube shell, the three-jaw chuck 2 clamps the tube shell when the clamping jaws of the three-jaw chuck 2 move outward to abut against the inner wall of the tube shell, so that the position of the tube shell is fixed, facilitating processing, two limiting rods 3 and a fixed frame 4 are fixedly installed on the base plate 1, an annular track 5 is movably installed between the two limiting rods 3 and the fixed frame 4, the annular track 5 is located directly above the three-jaw chuck 2, a driving assembly capable of driving the annular track 5 to move up and down is arranged on the fixed frame 4, and a welding mechanism is arranged on the annular track 5.

[0039] The annular track 5 comprises a first arc-shaped track and a second arc-shaped track, one end of the first arc-shaped track and the second arc-shaped track are hingedly connected to each other, the other end is provided with a socket 51 and a plug 52, two fixed rods 53 are fixedly installed on the first arc-shaped track, the end portions of the two fixed rods 53 are provided with plug holes matched with the two limiting rods 3, and the two limiting rods 3 limit the two fixed rods 53, thereby improving the stability of the annular track 5.

[0040] The first arc-shaped track is fixedly provided with a connecting rod 54, the end of the connecting rod 54 is fixedly provided with a sliding block 541, the driving assembly comprises a driving motor 6 fixedly arranged at the upper end of the fixed frame 4 and a threaded rod 61 fixedly arranged on the output shaft of the driving motor 6, a sliding groove is formed in the fixed frame 4, the sliding block 541 is slidingly arranged in the sliding groove, and the end of the threaded rod 61 penetrates into the sliding groove and is threadedly connected with the sliding block 541.

[0041] The welding mechanism comprises a movable seat 7, a movable clamping block 71 fixedly arranged at the lower end of the movable seat 7 and a welding gun 72 arranged on the movable seat 7, the movable seat 7 is arranged at the upper end of the annular track 5, the movable clamping block 71 is movably clamped in the annular track 5, and the movable seat 7 is prevented from being separated from the annular track 5.

[0042] The lower end of the movable seat 7 is fixedly provided with a fixed block 73, the fixed block 73 is rotatably provided with a rotating wheel 731 driven by a motor, the rotating wheel 731 is in contact with the inner side of the annular track 5, and when the rotating wheel 731 rotates, the movable seat 7 can be driven to move along the annular track 5 along an annular track, so that the welding work of the pipe fitting is facilitated.

[0043] A through hole is formed in the fixed block 73, the handle end of the welding gun 72 is movably inserted into the through hole, and the fixed block 73 is provided with an adjusting assembly which can adjust the extending length of the welding gun 72 according to the arc surface of the outer wall of the heat exchanger pipe shell.

[0044] The adjusting assembly comprises a fixed seat 8, a movable rod 81, a fixed protruding ring 82, a compression spring 83, a rotating end 84 and a pushing bar 85, the fixed seat 8 is fixedly arranged on one side of the fixed block 73, a insertion slot is formed in the fixed seat 8, the movable rod 81 is movably inserted into the insertion slot, the fixed protruding ring 82 is fixedly arranged on the movable rod 81, the compression spring 83 is sleeved on the movable rod 81 and located between the fixed protruding ring 82 and the fixed seat 8, the rotating end 84 is rotatably arranged at one end of the movable rod 81, the pushing bar 85 is fixedly arranged at the other end of the movable rod 81, the end of the pushing bar 85 is provided with a U-shaped opening 851 and an arc-shaped opening 852 vertically penetrating the U-shaped opening 851, two positioning columns 721 are fixedly arranged on the handle of the welding gun 72 in a symmetrical mode, the two positioning columns 721 are movably arranged in the arc-shaped opening 852, the rotating end 84 is composed of a rotating seat and a roller, the rotating seat is rotatably connected with the movable rod 81, the roller is made of rubber, the outer side of the roller is coated with dust-sticking glue, when the roller rotates, the dust-sticking glue on the roller can stick the dust on the pipe shell first, so that the welding efficiency can be improved, a limiting protruding strip is arranged on the movable rod 81 along the direction of the movable rod 81, and a limiting groove matched with the limiting protruding strip is arranged on the slot wall.

[0045] The use method of the present application is as follows:

[0046] In use, the second arc-shaped track of the annular track 5 is unfolded from the first arc-shaped track, and then the pipe shell to be welded is placed on the base plate 1, and the lower end of the pipe shell covers the three-jaw chuck 2, the clamping jaws of the three-jaw chuck 2 are controlled to move outward until the clamping jaws are in contact with the inner wall of the pipe shell, and the pipe shell is clamped, at this time, the position of the pipe shell is fixed, and the pipe shell is convenient for processing;

[0047] The second arc-shaped track is closed with the first arc-shaped track, the plug 52 is matched with the socket, the second arc-shaped track and the first arc-shaped track are locked, the annular track 5 formed by the closed first arc-shaped track and second arc-shaped track encloses the pipe shell, the driving motor 6 is controlled to work, the threaded rod 61 rotates, drives the sliding block 541 to move vertically up and down in the sliding groove, thereby driving the entire annular track to move up and down, and the working height of the welding mechanism can be adjusted, when the welding gun 72 is opposite to the height of the welding point, the driving motor 5 stops working.

[0048] When the outer wall of the pipe shell needs to be welded, the rotating wheel 731 is rotated to drive the movable seat 7 to move on the annular track 5, the rotating end head 84 at the end of the movable rod 81 is in contact with and rolls on the outer wall of the pipe shell, the movable rod 81 is stretched and retracted on the fixed seat 8, and the movable rod 81 drives the welding gun 72 to make corresponding stretching and retraction movement through the poking bar 85, so that the distance between the end of the welding gun 72 and the pipe shell is adjusted to be optimal, and the welding gun 72 can automatically weld along the heat exchanger shell, and the welding gun 72 does not shake during welding, and the welding precision is improved.

[0049] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, and all should be covered in the scope of the claims of the present application.

Claims

1. A graphite heat exchanger welding apparatus comprising a base plate (1), characterized in that: The bottom plate (1) is fixedly installed with three-jaw chuck (2) which can position the lower end of the shell, the bottom plate (1) is fixedly installed with two limiting rods (3) and fixed frame (4), the two limiting rods (3) and fixed frame (4) are movably installed with annular track (5), the annular track (5) is located directly above the three-jaw chuck (2), the fixed frame (4) is provided with driving assembly which can drive the annular track (5) to move up and down, the annular track (5) is provided with welding mechanism.

2. The graphite heat exchanger welding apparatus of claim 1, wherein: The annular track (5) comprises first arc-shaped track and second arc-shaped track, one end of the first arc-shaped track and the second arc-shaped track is hinged with each other through hinge, the other end is provided with socket (51) and plug (52), the first arc-shaped track is fixedly installed with two fixed rods (53), the end of the two fixed rods (53) is provided with socket which is matched with the two limiting rods (3).

3. The graphite heat exchanger welding apparatus of claim 2, wherein: The first arc-shaped track is fixedly installed with connecting rod (54), the end of the connecting rod (54) is fixedly installed with sliding block (541), the driving assembly comprises driving motor (6) which is fixedly installed on the upper end of the fixed frame (4) and threaded rod (61) which is fixedly installed on the output shaft of the driving motor (6), the fixed frame (4) is provided with sliding slot, the sliding block (541) is slidably installed in the sliding slot, the end of the threaded rod (61) penetrates into the sliding slot and is threadedly connected with the sliding block (541).

4. The graphite heat exchanger welding apparatus of claim 1, wherein: The welding mechanism comprises movable seat (7), movable clamping block (71) which is fixedly installed on the lower end of the movable seat (7) and welding gun (72) which is arranged on the movable seat (7), the movable seat (7) is arranged on the upper end of the annular track (5), the movable clamping block (71) is movably clamped in the annular track (5).

5. The graphite heat exchanger welding apparatus of claim 4, wherein: The lower end of the movable seat (7) is fixedly installed with fixed block (73), the fixed block (73) is rotatably installed with rotating wheel (731) which is driven by motor, the rotating wheel (731) is in contact with the inner side of the annular track (5).

6. The graphite heat exchanger welding apparatus of claim 5, wherein: The fixed block (73) is provided with through hole, the handle end of the welding gun (72) is movably inserted into the through hole, the fixed block (73) is provided with adjusting assembly which can adjust the length of the welding gun (72) according to the arc surface of the outer wall of the heat exchanger shell.

7. The graphite heat exchanger welding apparatus of claim 6, wherein: The adjusting assembly comprises a fixed seat (8), a movable rod (81), a fixed convex ring (82), a compression spring (83), a rotating end (84) and a poking bar (85), the fixed seat (8) is fixedly installed on one side of the fixed block (73), a slot is formed in the fixed seat (8), the movable rod (81) is movably inserted into the slot, the fixed convex ring (82) is fixedly installed on the movable rod (81), the compression spring (83) is sleeved on the movable rod (81), and the compression spring (83) is located between the fixed convex ring (82) and the fixed seat (8), the rotating end (84) is rotatably installed on one end of the movable rod (81), the poking bar (85) is fixedly installed on the other end of the movable rod (81), the end of the poking bar (85) is provided with a U-shaped opening (851) and an arc-shaped opening (852) vertically penetrating the U-shaped opening (851), and two positioning columns (721) are symmetrically fixedly installed on the handle of the welding gun (72) and movably installed in the arc-shaped opening (852).

8. The graphite heat exchanger welding apparatus of claim 7, wherein: The rotating end (84) is composed of a rotating adapter and a roller, the rotating adapter is rotatably connected with the movable rod (81), the roller is made of rubber, and the outer side of the roller is coated with dust-sticking glue.

9. The graphite heat exchanger welding apparatus of claim 7, wherein: A limiting convex strip is arranged on the movable rod (81) along the direction of the movable rod (81), and a limiting groove matched with the limiting convex strip is arranged on the slot wall.

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