CN211759421U - Welding device of plate heat exchanger - Google Patents

Abstract

The utility model discloses a welding device for a plate heat exchanger, which belongs to the technical field of plate heat exchangers. The bottom end of the welding device frame is provided with a telescopic rod, the telescopic rod is located between two electric sliding rails, and the end of the telescopic rod away from the welding device frame is provided with a welding gun. The utility model uses the fixed block, the mounting plate and the pressing block arranged on the frame of the welding device, operates the trapezoidal lead screw in the mounting bracket through the travel switch, and then pushes the hollow push rod to move downward through the rotation of the trapezoidal lead screw. The push rod drives the mounting plate and the pressure block to press down the welding piece. This design can make the pressure block roll the welding piece when the welding torch is welding the welding piece, which helps to reduce the welding residual stress and avoid welding. Stress corrosion cracking and leakage occurred at the joints.

Description

A welding device for plate heat exchanger

technical field

The utility model relates to the field of plate heat exchangers, in particular to a welding device for plate heat exchangers.

Background technique

The plate heat exchanger is a high-efficiency heat exchanger composed of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-vapor heat exchange. It is a heat transfer energy-saving equipment widely used in petrochemical industry. It has simple structure and low manufacturing cost.

The tube side and shell side of the heat exchanger are formed by welding, and welding will inevitably generate residual stress. Under the combined action of residual stress and corrosive medium, stress corrosion cracking and leakage will occur at the weld of the tube sheet. Therefore, it is necessary to provide a welding device for plate heat exchangers to solve the above problems.

Utility model content

The purpose of the present utility model is to provide a welding device for a plate heat exchanger that reduces residual stress in view of the above-mentioned deficiencies of the prior art.

The technical scheme of the present utility model is achieved as follows: a welding device for a plate heat exchanger, including a welding device frame, electric slide rails are fixedly arranged on both sides of the lower surface of the welding device frame, and the welding device The bottom end of the frame is provided with a telescopic rod, the telescopic rod is located between the two electric slide rails, the end of the telescopic rod away from the welding device frame is provided with a welding gun, and the ends of the two electric slide rails that are close to each other are movable Two fixed blocks are connected, the two fixed blocks are located on both sides of the telescopic rod, and two electric pulleys are arranged on both sides of the two fixed blocks, and the plurality of electric pulleys are suitable for the electric sliding rail The bottom ends of the two fixing blocks are fixedly connected with mounting brackets, and one end of the mounting brackets away from the fixing blocks is provided with a push rod groove, and a travel switch is installed inside the fixing blocks. The bottom end is connected with a trapezoidal lead screw, the trapezoidal lead screw is located inside the groove of the push rod, and the travel switch and the trapezoidal lead screw are electrically connected, and the end of the trapezoidal lead screw away from the fixed block is movably connected with a hollow push rod. The end of the hollow push rod close to the trapezoidal lead screw is provided with a limit block, and the limit block is adapted to the groove of the push rod.

As a further solution of the present application, one end of the two hollow push rods away from the trapezoidal lead screw is provided with a mounting plate, and the bottom ends of the two mounting plates are provided with a pressing block groove.

As a further solution of the present application: both sides of the two mounting plates are provided with a first limit groove, both sides of the two pressure blocks are provided with a second limit groove, and the first limit The position groove is connected with the second limit groove.

As a further solution of the present invention: the bottom ends of the two mounting plates are connected with pressing blocks, and the two sides of the two mounting plates are connected with limit bolts by threads.

As a further solution of the present application: the limit bolts are adapted to the first limit groove and the second limit groove respectively, and the pressure block is connected to the inner wall top surface of the pressure block groove through the limit bolts. .

As a further solution of the present application: a worktable is arranged below the frame of the welding device, clamps are provided on both ends of the upper surface of the worktable, and a backing plate is fixed at one end of the two clamps that are close to each other. The backing plate is located under the welding torch.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model operates the trapezoidal lead screw in the mounting bracket through the fixed block, the travel switch, the hollow push rod, the mounting plate and the pressing block arranged on the welding device frame, and then operates the trapezoidal lead screw in the mounting bracket through the travel switch, and then rotates the trapezoidal lead screw. Push the hollow push rod to move downward, and the hollow push rod drives the mounting plate and the pressure block to press down the welding piece. To reduce welding residual stress and avoid stress corrosion cracking and leakage at welds;

2. The present utility model removes the limit bolt from the first limit groove through the thread through the limit bolt, the first limit groove, the second limit groove and the pressure block arranged on the mounting plate, and then It can release the fixing of the pressure block by the limit bolt, so that the pressure block can be removed from the installation plate, which is convenient for the replacement of the pressure plate after long-term use, and through the electric pulley set on the fixed block, the electric pulley can move on the electric slide rail The fixed block can be driven to adjust the position, so that the device can be compatible with different types of welding parts for rolling, and the practicability of the device is improved.

Description of drawings

The present utility model will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but it does not constitute any limitation to the present utility model.

Fig. 1 is the structural representation of the present utility model;

Figure 2 is a schematic diagram of the cross-sectional structure of the mounting bracket of the present invention;

Figure 3 is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;

In the picture: 1. Welding device frame; 2. Electric slide rail; 3. Telescopic rod; 4. Welding gun; 5. Fixed block; 6. Electric pulley; 7. Mounting bracket; 8. Travel switch; 9. Trapezoidal lead screw ;10, push rod groove; 11, hollow push rod; 12, mounting plate; 13, pressure block groove; 14, first limit groove; 15, second limit groove; 16, pressure block; 17 , Limit bolt; 18, Workbench; 19, Fixture; 20, Backing plate.

Detailed ways

The technical solution of the present patent will be described in further detail below in conjunction with specific embodiments.

The utility model provides a welding device for a plate heat exchanger as shown in Figures 1-3, comprising a welding device frame 1, and electric sliding rails 2 are fixedly arranged on both sides of the lower surface of the welding device frame 1, and the welding device frame 1 is provided with electric sliding rails 2. The bottom end of the device frame 1 is provided with a telescopic rod 3, the telescopic rod 3 is located between the two electric slide rails 2, the end of the telescopic rod 3 away from the welding device frame 1 is provided with a welding torch 4, and the two electric slide rails 2 are close to each other Two fixed blocks 5 are movably connected to one end of the two fixed blocks 5. The two fixed blocks 5 are located on both sides of the telescopic rod 3. Two electric pulleys 6 are arranged on both sides of the two fixed blocks 5. The rail 2 is adapted, and through the electric pulley 6 set on the fixed block 5, the electric pulley 6 can move on the electric sliding rail 2 and can drive the fixed block 5 to adjust the position, so that the device can be compatible with different types of welding parts for grinding. The practicability of the device is improved. The bottom ends of the two fixing blocks 5 are fixedly connected with a mounting bracket 7, and one end of the mounting bracket 7 away from the fixing block 5 is provided with a push rod groove 10, and the interior of the fixing block 5 is installed with The travel switch 8, the bottom end of the fixing block 5 is connected with a trapezoidal screw 9, the trapezoidal screw 9 is located inside the push rod groove 10, and the travel switch 8 and the trapezoidal screw 9 are electrically connected, and the trapezoidal screw 9 is far away from the fixed One end of the block 5 is movably connected with a hollow push rod 11, and one end of the hollow push rod 11 close to the trapezoidal lead screw 9 is provided with a limit block, and the limit block is adapted to the push rod groove 10, and the installation bracket 7 is operated through the travel switch 8. The inner trapezoidal screw 9 then pushes the hollow push rod 11 to move downward through the rotation of the trapezoidal screw 9, and the hollow push rod 11 drives the mounting plate 12 and the pressing block 16 to press down the welding piece. When the welding torch 4 welds the weldment, the pressing block 16 is used to roll the weldment, which helps to reduce the welding residual stress and avoid the occurrence of stress corrosion cracking and leakage at the weld.

Further, one end of the two hollow push rods 11 away from the trapezoidal lead screw 9 is provided with a mounting plate 12 , and the bottom ends of the two mounting plates 12 are both provided with a pressing block groove 13 .

Further, both sides of the two mounting plates 12 are provided with first limiting grooves 14 , both sides of the two pressing blocks 16 are provided with second limiting grooves 15 , and the first limiting grooves 14 are connected to the second limiting groove 15 . The two limiting grooves 15 are connected.

Further, the bottom ends of the two mounting plates 12 are both connected with pressing blocks 16 , and both sides of the two mounting plates 12 are connected with limiting bolts 17 through threads.

Further, the limit bolts 17 are adapted to the first limit groove 14 and the second limit groove 15 respectively, and the pressure block 16 is connected to the inner wall top surface of the pressure block groove 13 through the limit bolt 17, so as to connect the pressure block 16 to the inner wall of the pressure block groove 13. The limit bolt 17 is taken out from the first limit groove 14 through the thread, so that the fixation of the pressure block 16 by the limit bolt 17 can be released, so that the pressure block 16 can be disassembled from the mounting plate 12, which is convenient for the replacement of the pressure plate after long-term use. .

Further, a worktable 18 is provided below the welding device frame 1, clamps 19 are provided on both ends of the upper surface of the worktable 18, and a backing plate 20 is fixed at one end of the two clamps 19 close to each other, and the backing plate 20 is located at the welding torch. Below 4, the welding piece can be fixed by the clamp 19, and the pressing block 16 can bear the load through the backing plate 20 under the welding piece when rolling the welding piece.

Further, the structure of the travel switch 8 and the connection method thereof are all existing technologies, and will not be further disclosed in this application; and the electric sliding rail 2 and the electric pulley 6 are both disclosed in the prior art, and their specific structures and Its control and its power supply are also existing mature technologies, and will not be further elaborated in this application; at the same time, all the power supplies in this application are electrically connected to the external power supply through the power cord to realize the on and off of the power supply .

In the idle place of the device, place all the drivers matched with the electrical components, and connect all the above-mentioned driving components, which refer to the power components, electrical components and the adapted power supply, through wires by those skilled in the art. The specific connection means , it should be referred to the following working principle, the electrical connection between the electrical devices is completed in sequence, and the detailed connection means are well known in the art.

The working principle of the utility model: when the welding device is in use, the trapezoidal lead screw 9 in the mounting bracket 7 is operated by the travel switch 8, and then the hollow push rod 11 is pushed downward by the rotation of the trapezoidal lead screw 9, and the hollow push rod 11 The mounting plate 12 and the pressing block 16 are driven to press down the welding piece. This design enables the pressing block 16 to roll the welding piece when the welding torch 4 welds the welding piece, which helps to reduce the welding residual stress. Avoid stress corrosion cracking and leakage at the weld; and remove the limit bolt 17 from the first limit groove 14 through the thread, so as to release the limit bolt 17 from fixing the pressure block 16, so that the pressure block 16 It can be disassembled from the mounting plate 12, which is convenient for the replacement of the pressure plate after long-term use; through the electric pulley 6 set on the fixed block 5, the electric pulley 6 can move on the electric sliding rail 2 and can drive the fixed block 5 to adjust the position, so that the electric pulley 6 can move on the electric sliding rail 2. The device can be compatible with different types of welding parts for rolling, which improves the practicability of the device.

The above-mentioned embodiments are the preferred embodiments of the present invention, and are only used to facilitate the description of the present invention, and are not intended to limit the present invention in any form. Within the scope of the technical features mentioned in the utility model, the equivalent embodiments that utilize the technical contents disclosed in the present utility model to make partial changes or modifications, and do not depart from the technical feature contents of the present utility model, still belong to the technical features of the present utility model. In the range.

Claims (6)

1. A welding set of plate heat exchanger which characterized in that: the welding device comprises a welding device rack (1), wherein electric slide rails (2) are fixedly arranged on two sides of the lower surface of the welding device rack (1), a telescopic rod (3) is arranged at the bottom end of the welding device rack (1), the telescopic rod (3) is positioned between the two electric slide rails (2), a welding gun (4) is arranged at one end, away from the welding device rack (1), of the telescopic rod (3), two electric slide rails (2) are movably connected with two fixed blocks (5) at the end, close to each other, of the two electric slide rails (2), the two fixed blocks (5) are positioned on two sides of the telescopic rod (3), two electric pulleys (6) are arranged on two sides of the two fixed blocks (5), a plurality of electric pulleys (6) are matched with the electric slide rails (2), an installation support (7) is fixedly connected with the bottom ends of the two fixed blocks (5), and a push rod groove (10) is formed in, the internally mounted of fixed block (5) has travel switch (8), the bottom of fixed block (5) is connected with trapezoidal lead screw (9), trapezoidal lead screw (9) are located the inside of push rod recess (10), just travel switch (8) pass through electric connection with trapezoidal lead screw (9), the one end swing joint that fixed block (5) were kept away from to trapezoidal lead screw (9) has hollow push rod (11), the one end that hollow push rod (11) are close to trapezoidal lead screw (9) is provided with the stopper, just stopper and push rod recess (10) looks adaptation.

2. The welding device of the plate heat exchanger according to claim 1, wherein mounting plates (12) are respectively arranged at the ends of the two hollow push rods (11) far away from the trapezoidal screw (9), and pressing block grooves (13) are respectively formed at the bottom ends of the two mounting plates (12).

3. A welding device for a plate heat exchanger according to claim 2, wherein two sides of the two mounting plates (12) are respectively provided with a first limiting groove (14), two sides of the two pressing blocks (16) are respectively provided with a second limiting groove (15), and the first limiting grooves (14) are connected with the second limiting grooves (15).

4. A welding device for a plate heat exchanger according to claim 3, characterized in that the bottom ends of the two mounting plates (12) are connected with press blocks (16), and both sides of the two mounting plates (12) are connected with limit bolts (17) through threads.

5. A plate heat exchanger welding device according to claim 4, characterized in that the limiting bolts (17) are respectively fitted into the first limiting groove (14) and the second limiting groove (15), and the pressing block (16) is in fit connection with the top surface of the inner wall of the pressing block groove (13) through the limiting bolts (17).

6. The welding device of a plate heat exchanger according to claim 1, characterized in that a workbench (18) is arranged below the frame (1) of the welding device, two clamps (19) are arranged at two ends of the upper surface of the workbench (18), a backing plate (20) is fixedly arranged at the end of each of the two clamps (19) close to each other, and the backing plate (20) is positioned below the welding gun (4).

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