Tool for detecting plate tube long seam of small plate heat exchanger

Abstract

A tool for detecting a long seam of a small plate heat exchanger plate tube comprises a base structure, a clamping device is arranged on the base structure, and the plate tube is clamped and fixed by the clamping device; the upper part of the plate tube is sealed by an upper sealing device mounted at the upper part of the base structure, and the lower end of the plate tube is sealed by a lower sealing device mounted at the lower part of the base structure; the clamping device is pushed by a clamping feeding structure, the upper sealing device is pushed by an upper feeding structure, and the lower sealing device is pushed by a small lead screw lifting machine. The long seam welding defect detection device can complete long seam welding defect detection of plate pipes of different materials and different specifications, and has the advantages of high efficiency, stability and high practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger manufacturing technical field, specifically point to a kind of detection small-sized plate heat exchanger plate tube long seam's tool. BACKGROUND

[0002] Regarding welded plate heat exchanger (hereinafter referred to as heat exchanger), its core component plate bundle is mainly composed of a certain number of plate tubes, and the plate tube is formed by two plate pieces through seam welding, automatic argon arc welding machine group welding, and the weld is called plate tube long seam. In order to ensure the manufacturing quality of heat exchanger product, before formal assembly of heat exchanger, the plate tube long seam welding quality needs to be detected through air tightness test, and the subsequent heat exchanger manufacturing work is carried out after determining whether there is welding defect. At present, in petrochemical industry, the device for detecting plate tube long seam used by manufacturing enterprises is relatively simple. The specific implementation mode is as follows: after placing a plate tube on the platform, the pressing plate is lifted by the overhead crane to cover the plate tube to fix the position of the plate tube, and then the plate tube end portion is sealed by pushing the plate with gasket, one side of the plate is a perforated plate, gas is introduced into the plate tube from the perforated plate, after reaching a certain air pressure, the plate tube is sprayed with soap water and other foaming liquids on both sides of the long seam after pressure maintaining for a period of time, if there is a point with welding defect, bubbles will be generated at the point, so as to complete the detection, after the detection is completed, the plate tube end portion is pushed away again, the pressing plate is lifted by the overhead crane, and the plate tube is manually pulled out to complete the detection of the welding quality of single plate tube long seam. By using such traditional method, the detection of only one plate tube can be completed each time, the process is complicated, time-consuming and low in production efficiency. Therefore, in actual production process, in order to ensure the product manufacturing period, the plate tubes of conventional materials such as S31603, S30408 and S30403 can usually be detected by sampling inspection in a certain proportion, so that the product manufacturing quality cannot be effectively guaranteed. UTILITY MODEL CONTENTS

[0003] The utility model provides a kind of detection small-sized plate heat exchanger plate tube long seam's tool, with the advantages of high efficiency, stability and high practicability.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A kind of detection small-sized plate heat exchanger plate tube long seam's tool, including base structure, clamping device is arranged on the base structure, and the plate tube is clamped and fixed by the clamping device;The upper part of the plate tube is sealed by the upper sealing device installed on the upper part of the base structure, and the lower end of the plate tube is sealed by the lower sealing device installed on the lower part of the base structure;The clamping device is pushed by clamping feed structure, the upper sealing device is pushed by upper feed structure, and the lower sealing device is pushed by small-sized screw rod elevator.

[0006] The base structure includes a bottom plate, a base, and a vertical pole; the vertical pole is installed at the four corners of the bottom plate, a base is installed on the inner side of the vertical pole, the clamping device is installed on the base, and the upper end of the vertical pole is connected to the upper sealing device by bolts.

[0007] The upper sealing device includes a top plate, an upper push plate, an upper rubber pad, a ventilation distribution pipe, and an air pipe; the top plate is installed on the upper part of the vertical pole, the upper push plate is arranged below the top plate, the upper rubber pad is fixed on the lower end surface of the upper push plate, the air pipe passes through the upper push plate and the upper rubber pad and is connected to the plate pipe inlet, and the end of the ventilation distribution pipe is connected to the air source through a ball valve.

[0008] The air pipe and plate pipe connecting section is a flat square structure.

[0009] The clamping device includes an outermost vertical plate, a plurality of pressure plates are arranged between the vertical plates, and the sliding rod passes through the plurality of pressure plates and the rear ends of the vertical plates are connected with nuts and washers to connect the plurality of pressure plates and the vertical plates into one.

[0010] The lower sealing device includes a small screw lift, a lower push plate, and a lower rubber pad; the small screw lift is installed on the base plate through a pad, the lower push plate is installed on the top of the small screw lift, and the lower rubber pad is installed on the lower push plate; a long operating rod is installed at the crank handle end of the small screw lift.

[0011] The clamping feeding structure and the upper feeding structure both include bearings, which are installed in the bearing cover; the bearings are matched with the screw, and the other end of the screw is matched with the nut and then connected to the handle.

[0012] The clamping device of the utility model is fixed to the base by a clamping plate. A certain gap is reserved between the pressure plates to ensure that the plate tube can be inserted from the side of the pressure plate. The spiral transmission is achieved by rotating the handle to drive the pressure plate to perform linear reciprocating motion to clamp and loosen the plate tube, facilitating the insertion and removal of the plate tube. The top plate of the upper sealing device is fixed to the vertical rod of the base structure by a nut. The spiral transmission is achieved by rotating the handle to drive the top plate to perform linear reciprocating motion. While achieving the upper seal, it also drives the ventilation distribution pipe and the air pipe to perform linear motion, facilitating the introduction of gas into the interior of the plate tube. The lower sealing device is installed on the bottom plate and rotates by rotating the crank handle, driving the screw to move up and down in the vertical direction, thereby driving the lower push plate to perform vertical lifting and lowering motion to complete the lower seal.

[0013] The utility model can complete different materials and is suitable for welding leak detection of long seams of plate tubes in small welded plate heat exchangers with plate length not exceeding 1200mm and width not exceeding 600mm. It can improve production efficiency and ensure product quality, and has the advantages of high efficiency, stability and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The utility model discloses a structure schematic diagram;

[0015] Figure 2 The utility model discloses a base structure schematic diagram;

[0016] Figure 3 The utility model discloses a clamping device structure schematic diagram;

[0017] Figure 4 The utility model discloses a lower sealing device structure schematic diagram;

[0018] Figure 5 The utility model discloses an upper sealing device structure schematic diagram;

[0019] Figure 6 The Figure 5 The utility model discloses a trachea schematic diagram;

[0020] Figure 7 The utility model discloses a plate pipe schematic diagram. Specific implementation

[0021] The utility model and its effect are further explained below in connection with the drawings.

[0022] As Figure 1 The utility model discloses a tool for detecting the long seam of the plate pipe of a small plate heat exchanger, which comprises a base structure 1, a clamping device 2 is arranged on the base structure 1, and the plate pipe is clamped and fixed by the clamping device 2; the upper portion of the plate pipe is sealed by an upper sealing device 4 arranged on the upper portion of the base structure 1, and the lower end of the plate pipe is sealed by a lower sealing device 3 arranged on the lower portion of the base structure 1; the clamping device 2 is pushed by a clamping feeding structure, the upper sealing device 4 is pushed by an upper feeding structure, and the lower sealing device 3 is pushed by a small lead screw lifter.

[0023] As Figure 2 The base structure 1 comprises a bottom plate 1-1, a base 1-2 and a vertical rod 1-4; the vertical rod 1-4 is arranged at the four corners of the bottom plate 1-1, the inner side of the vertical rod 1-4 is provided with the base 1-2, the clamping device 2 is arranged on the base 1-2, and the upper end of the vertical rod 1-4 is connected with the upper sealing device 4 through bolts.

[0024] The bottom plate 1-1 is directly placed on the ground, the lower portion of the vertical rod 1-4 is a square pad structure and is fixed on the bottom plate 1-1 through bolts, and the upper portion is thinner than the lower portion, so that the base structure 1 and the upper sealing device 4 are connected and fixed.

[0025] A clamping plate 1-3 is welded on each base 1-2, and the clamping plate 1-3 is used for fixing the position of the clamping device 2.

[0026] As Figure 5As shown, the upper sealing device includes a top plate 4-1, an upper push plate 4-7, an upper rubber pad 4-8, a ventilation distribution pipe 4-9, and a gas pipe 4-10; the top plate 4-1 is installed on the upper part of the vertical rod 1-4, the upper push plate 4-7 is arranged below the top plate 4-1, the upper rubber pad 4-8 is fixed on the lower end surface of the upper push plate 4-7 by sealing glue, the gas pipe 4-10 is communicated with the plate bundle inlet after passing through the upper push plate 4-7 and the upper rubber pad 4-8, and the end of the ventilation distribution pipe 4-9 is communicated with the gas source through a ball valve to introduce gas into the inside of the tool.

[0027] The upper feeding structure includes a first bearing 4-5 installed in a first bearing cover 4-6, the first bearing cover 4-6 is installed on the upper push plate 4-7 by bolts, the hole of the first nut 4-4 is tapped, and the first nut 4-4 is fixed on the top plate 4-1 in a welding manner, one end of the first screw rod 4-3 is connected with the first bearing 4-5 and the first nut 4-4 in sequence, and the other end of the first screw rod 4-3 is connected with the handle 4-2,

[0028] In actual production, the ball valve at the end of the ventilation distribution pipe 4-9 is opened, the handle 4-2 is rotated to drive the screw rod 4-3 and the nut 4-4 to engage to convert the torque into thrust to drive the screw rod 4-3 to move along the axial surface to drive the upper push plate 4-7 and the upper rubber pad 4-8 to move downward, thereby completing the upper sealing and introducing gas into the inside of the tool.

[0029] Figure 6 The gas pipe 4-10 is shown in the schematic view, one end connected with the ventilation distribution pipe 4-9 is a circular hole, one end protruding from the top plate 4-1 is a flat hole, the flat hole can be inserted between the pressing plates to ensure that the gas is introduced into the inside of the plate pipe, and the flat hole can ensure that the gas is slowly introduced to prevent the gas pressure in the inside of the plate pipe from rising sharply.

[0030] As shown in the schematic view, Figure 3 As shown, the clamping device 2 includes a vertical plate 2-1 arranged at the outermost side, a plurality of pressing plates 2-2 arranged between the vertical plates 2-1, and a slide rod 2-3 passing through the plurality of pressing plates 2-2 and the end of the vertical plate 2-1 and connected with the plurality of pressing plates 2-2 and the vertical plate 2-1 as a whole by a nut and a washer 2-9. When installed, a certain gap is reserved between each pressing plate 2-2 to ensure that the plate pipe can be put into the tool from the side of the tool. The washer 2-9 is added between the nut and the vertical plate 2-1 to increase the contact area and improve the stability and reliability of the connection.

[0031] The clamping feed structure comprises a second bearing 2-7 installed in a second bearing cover 2-8, the second bearing cover 2-8 is installed on the two outermost pressing plates 2-2, one end of a second screw rod 2-5 is matched with the second bearing 2-7, the other end is matched with a second nut 2-6 installed on the vertical plate 2-1, and the rear end is installed with a second handle 2-4. The second handle 2-4 is rotated simultaneously to drive the second screw rod 2-5 and the second nut 2-6 to mesh, torque is converted into thrust to push the second screw rod 2-5 to move along the axial surface to drive the pressing plate 2-2 to move forward, after the pressing plate 2-2 contacts with the plate tube, the plate tube is continuously moved forward to drive the next pressing plate 2-2 to move forward, after all the plate tubes are clamped, subsequent work is carried out.

[0032] As shown in Figure 4 The lower sealing device 3 comprises a small screw rod elevator 3-1, a lower push plate 3-3 and a lower rubber pad 3-5. The small screw rod elevator 3-1 is installed on the bottom plate 1-1 through a backing plate 3-6, the lower push plate 3-3 is installed on the top of the small screw rod elevator 3-1, and the lower rubber pad 3-5 is fixed on the lower push plate 3-3. A long operating rod 3-2 is installed on the handle end of the small screw rod elevator 3-1.

[0033] The nut block at the bottom of the lower push plate 3-3 is matched with the screw rod at the top of the small screw rod elevator 3-1 and is fixed through a pin 3-4. The long operating rod 3-2 is rotated to drive the small screw rod elevator to make lifting movement, thereby driving the lower push plate 3-3 and the lower rubber pad 3-5 to make lifting movement, and the lower sealing is completed.

[0034] The specific implementation process of the utility model is as follows: a certain gap is reserved between the pressing plates, a plate tube is placed in each gap, the two handles of the rotary clamping device are rotated to drive the pressing plates and the plate tubes to move forward, the handle of the lower sealing device is rotated to drive the lower push plate to move upward, the lower sealing is completed through the rubber pad on the upper part of the lower push plate, then the handle of the upper sealing device is rotated to drive the upper push plate to move downward, the upper sealing is completed through the rubber pad on the upper push plate, then the external gas pipe is connected to the side of the air distribution pipe ball valve of the upper sealing device, the ball valve switch is opened, the gas is slowly introduced into the tool, after a certain period of pressure maintaining, the ball valve switch is closed, the gas introduction is stopped, and the soap water is brushed on the plate tube weld, whether there is leakage in the plate tube weld is checked by observing whether there is bubble on the surface of the weld, after the leakage checking is completed, the external gas pipe is removed, the handle of the upper sealing device, the handle of the clamping device and the handle of the lower sealing device are rotated in the opposite direction in sequence, and the plate tubes are taken out, and the work of efficiently and quickly checking the long seam of the small plate heat exchanger plate tube is completed.

Claims

1. A tool for detecting a gapping of a plate and tube of a small plate heat exchanger, characterized in that: The base structure (1) includes a bottom plate (1-1), a base (1-2), and a vertical rod (1-4). The vertical rod (1-4) is installed at the four corners of the bottom plate (1-1), and the inner side of the vertical rod (1-4) is installed with the base (1-2). The base (1-2) is installed with the clamping device (2), and the upper end of the vertical rod (1-4) is connected with the upper sealing device (4) through bolts.

2. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 1, characterized in that: The upper sealing device includes a top plate (4-1), an upper push plate (4-7), an upper rubber pad (4-8), an air distribution pipe (4-9), and an air pipe (4-10). The top plate (4-1) is installed on the upper part of the vertical rod (1-4), the upper push plate (4-7) is arranged below the top plate (4-1), the upper rubber pad (4-8) is fixed on the lower end surface of the upper push plate (4-7), the air pipe (4-10) is communicated with the inlet of the plate pipe after passing through the upper push plate (4-7) and the upper rubber pad (4-8), and the end of the air distribution pipe (4-9) is communicated with the air source through a ball valve.

3. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 1, characterized in that: The air pipe (4-10) and the plate pipe connection section are flat square structures.

4. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 3, characterized in that: The clamping device (2) includes a vertical plate (2-1) arranged at the outermost side, a plurality of pressing plates (2-2) arranged between the vertical plates (2-1), and a slide rod (2-3) passing through the plurality of pressing plates (2-2) and the end of the vertical plate (2-1) and connected with a nut and a washer (2-9) to connect the plurality of pressing plates (2-2) and the vertical plate (2-1) as a whole.

5. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 1, characterized in that: The lower sealing device (3) includes a small lead screw elevator (3-1), a lower push plate (3-3), and a lower rubber pad (3-5). The small lead screw elevator (3-1) is installed on the bottom plate (1-1) through a backing plate (3-6), the lower push plate (3-3) is installed on the top of the small lead screw elevator (3-1), and the lower rubber pad (3-5) is installed on the lower push plate (3-3). The handle end of the small lead screw elevator (3-1) is installed with a long operating rod (3-2).

6. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 1, characterized in that: The clamping feeding structure and the upper feeding structure both include a bearing installed in a bearing cover. The bearing is matched with a screw rod, and the other end of the screw rod is connected with a handle after being matched with a nut.

7. The tool for detecting the long seam of the plate tube of the small plate heat exchanger according to claim 1, characterized in that: ​

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