Inner hole welding back protection device

Abstract

The utility model relates to the field of coking production devices, and discloses an inner hole welding back protection device which comprises a gas cylinder serving as a gas containing cavity, the inner walls of the left side and the right side of the gas cylinder are both connected with rotating rings in a sliding mode, and a plurality of sliding arc-shaped grooves are formed in the rotating rings on the left side and the right side. Adjusting blocks are fixedly connected to the top ends of the rotating rings on the left side and the right side, the outer ends of the adjusting blocks penetrate through the outer wall of the gas cylinder, the adjusting blocks are connected with heat-resisting rubber rings through adjusting assemblies, and the opposite inner ends of the heat-resisting rubber rings are attached to the left end and the right end of the gas cylinder; and the size of the heat-resistant rubber ring is adjusted through the arrangement of the adjusting block, so that the device sealing effect is achieved. According to the utility model, the gas inlet and the gas outlet are externally connected with an argon source and an extraction valve, the back wall of the heat exchange tube is filled with argon through the small holes and the gas hole ring in the ventilation plate, and the gas sinking plate is designed to prevent the welding protection effect of the upper half part of the heat exchange tube from being reduced due to excessive accumulation of argon at the lower half part.

Description

Technical Field

[0001] The utility model relates to the field of coking production equipment, in particular to an inner hole weld back protection device. Background Art

[0002] Due to the requirements of container equipment structure, pipeline transportation and other production types, more and more tube sheet and tube connections are in the form of butt joint structure, and the welding method adopts inner hole welding. It is especially commonly used in the connection between tube sheet and heat exchange tube in the field of heat exchanger manufacturing. The inner hole welding method is to use tungsten inert gas welding to complete the welding inside the workpiece. During the welding process, the welding gun will have a device to deliver argon gas to protect the inner surface of the weld.

[0003] However, since there is no protective device on the outer surface of the weld, that is, the back of the workpiece, oxidation reaction will occur on the outer surface of the weld in a high-temperature environment, seriously affecting the mechanical properties of the weld and causing safety hazards to the equipment. At present, there is still a lack of effective measures for the gas sealing and argon distribution problems of the inner hole welding process in the inner hole welding back device.

[0004] Based on the above-mentioned lack of effective measures to ensure the gas sealing and argon distribution effect of the inner hole welding process, this application proposes an inner hole weld back protection device to address this technical problem. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an inner hole weld back protection device, which has the ability to effectively ensure the gas sealing and argon distribution effect during the inner hole welding process.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An inner hole weld back protection device includes a gas cylinder serving as a gas chamber, wherein the inner walls on both sides of the gas cylinder are slidably connected to rotating rings, and a plurality of sliding arc grooves are provided inside the rotating rings on both sides. The top ends of the rotating rings on both sides are fixedly connected to adjusting blocks, and the outer ends of the adjusting blocks penetrate the outer wall of the gas cylinder. The adjusting blocks are connected to heat-resistant rubber rings through adjusting components, and the heat-resistant rubber rings are fitted to the left and right ends of the gas cylinder relative to the inner ends, so as to adjust the size of the heat-resistant rubber rings by setting the adjusting blocks to achieve the sealing effect of the device.

[0008] Furthermore, the adjustment assembly includes several sliding rods fixedly connected to the inner end relative to the heat-resistant rubber ring, the outer walls of the sliding rods are slidably connected to the inside of the sliding arc groove on the inner side, and several movable grooves are opened inside the gas cylinder, and the outer walls of the sliding rods are slidably connected to the inside of the movable groove on the outer side.

[0009] Furthermore, the left and right sides of the top of the gas cylinder are fixedly connected with fixed blocks, and the two sides of the inner wall of the fixed block are fixedly connected with a plurality of limiting tooth blocks.

[0010] Furthermore, elastic grooves are provided on both inner and outer sides of the adjusting block, and a plurality of tooth blocks are provided on the outer walls of the adjusting block corresponding to the elastic grooves.

[0011] Furthermore, an air inlet is fixedly connected to the left side of the top of the gas cylinder, and an air outlet is fixedly connected to the right side of the top of the gas cylinder.

[0012] Furthermore, a pore ring is fixedly connected to the inside of the gas cylinder, and the thickness of the gas cylinder corresponding to the pore ring is smaller than the thickness at both ends.

[0013] Furthermore, a plurality of gas sinking plates are fixedly connected to the outer wall of the pore ring, the outer ends of the gas sinking plates are fixedly connected to the inner wall of the gas cylinder, and the inner ends of the gas sinking plates are fixedly connected to the outer wall of the pore ring.

[0014] Furthermore, the inner ends of adjacent gas sinking plates are commonly connected to ventilation plates, the outer ends of the ventilation plates are fixedly connected to the inner wall of the gas cylinder, and the inner ends of the ventilation plates are fixedly connected to the outer wall of the air hole ring.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, the shrinkage degree of the heat-resistant rubber ring can be adjusted by setting the adjusting block. The heat-resistant rubber ring fits the outer wall of the heat exchange tube to better ensure the gas sealing. The gap between the limiting tooth blocks on the inner wall of the fixed block fits the tooth blocks on the outside of the adjusting block. Elastic grooves are also provided on both sides of the adjusting block. In this way, the adjusting block is not easily shaken by external factors during the welding process, which may affect the gas sealing and device safety.

[0017] 2. In the present invention, the air inlet and outlet are externally connected to an argon source and an exhaust valve. The small holes and the air hole ring inside the ventilation plate jointly ensure that the argon fills the back wall of the heat exchange tube. The design of the gas sinking plate is to avoid excessive accumulation of argon in the lower half, which would reduce the welding protection effect of the upper half of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the inner hole weld back protection device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the rotating ring structure of the inner hole weld back protection device proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the adjustment block of the inner hole weld back protection device proposed by the utility model;

[0021] Figure 4 This is a schematic diagram of the air hole ring structure of the inner hole weld back protection device proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the gas sinking plate structure of the inner hole weld back protection device proposed in the utility model.

[0023] Legend:

[0024] 1. Gas cylinder; 2. Air inlet; 3. Air outlet; 4. Heat-resistant rubber ring; 5. Fixed block; 6. Adjustment block; 7. Sliding rod; 8. Rotating ring; 9. Ventilation plate; 10. Air hole ring; 11. Limiting tooth block; 12. Elastic groove; 13. Movable groove; 14. Sliding arc groove; 15. Gas sinking plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1-Figure 3 , the utility model provides an embodiment: an inner hole welding back protection device, including a gas cylinder 1 as a gas chamber, the inner walls on both sides of the gas cylinder 1 are slidably connected to the rotating ring 8, and a plurality of sliding arc grooves 14 are opened inside the rotating ring 8 on both sides. The tops of the rotating rings 8 on both sides are fixedly connected with an adjusting block 6, and the outer end of the adjusting block 6 passes through the outer wall of the gas cylinder 1. The adjusting block 6 is connected to a heat-resistant rubber ring 4 through an adjusting component. The relative inner ends of the heat-resistant rubber ring 4 are fitted to the left and right ends of the gas cylinder 1, so as to adjust the size of the heat-resistant rubber ring 4 by setting the adjusting block 6 to achieve the desired installation. In order to achieve a sealing effect, the adjustment component includes several sliding rods 7 fixedly connected to the inner end relative to the heat-resistant rubber ring 4, the outer walls of the sliding rods 7 are slidably connected to the inside of the sliding arc groove 14, and a number of movable grooves 13 are provided inside the gas cylinder 1. The outer walls of the sliding rods 7 are slidably connected to the inside of the movable groove 13. The left and right sides of the top of the gas cylinder 1 are fixedly connected to fixed blocks 5, and both sides of the inner wall of the fixed block 5 are fixedly connected to a number of limiting tooth blocks 11. Elastic grooves 12 are provided on the inner and outer sides of the adjustment block 6, and a number of tooth blocks are provided on the outer walls of the adjustment block 6 corresponding to the elastic groove 12.

[0027] Specifically: when the device is fitted against the outer wall of the heat exchange tube, the adjusting block 6 can be adjusted to drive the rotating ring 8 to rotate. The rotation of the rotating ring 8 will cause the sliding rod 7 to squeeze the heat-resistant rubber ring 4 inward, so that the inner ring of the heat-resistant rubber ring 4 can be tightly fitted against the outer wall of the heat exchange tube. The elastic groove 12 provided in the adjusting block 6 can make the tooth blocks on both sides shrink inward when moving. When the position of the adjusting block 6 is adjusted, the tooth blocks outside the elastic groove 12 will be elastically embedded in the limiting tooth block 11, so that the adjusting block 6 is not easily shaken by external factors during welding and affects the heat-resistant rubber ring 4's guarantee of the gas sealing of the device.

[0028] Reference Figure 4 and Figure 5 The gas cylinder 1 is fixedly connected to an air inlet 2 on the left side of the top end, and is fixedly connected to an air outlet 3 on the right side of the top end. An air hole ring 10 is fixedly connected inside the gas cylinder 1. The thickness of the gas cylinder 1 corresponding to the air hole ring 10 is less than the thickness at both ends. A number of gas sinking plates 15 are fixedly connected to the outer wall of the air hole ring 10. The outer ends of the gas sinking plates 15 are fixedly connected to the inner wall of the gas cylinder 1, and the inner ends of the gas sinking plates 15 are fixedly connected to the outer wall of the air hole ring 10. The inner ends of adjacent gas sinking plates 15 are commonly connected to the ventilation plate 9. The outer ends of the ventilation plates 9 are fixedly connected to the inner wall of the gas cylinder 1, and the inner ends of the ventilation plates 9 are fixedly connected to the outer wall of the air hole ring 10.

[0029] Specifically: argon is used as a shielding gas to wrap the welding area, forming an oxygen-free environment to prevent oxidation and contamination. This gas protection ensures that the welding area remains clean and pure during the welding process and is not contaminated by the external environment. This can produce a strong welding connection and improve the quality and strength of the weld. When the device is in use, the air inlet 2 is connected to the argon source so that the argon rushes into the gas cylinder 1. The exhaust valve connected to the air outlet 3 is in a closed state at this time. The argon will be spread all over the back wall of the heat exchange tube under the action of the small holes on the vent plate 9 and the pore ring 10. The design of the gas sinking plate 15 can avoid excessive accumulation of argon in the lower part, which will reduce the protection effect of the upper part of the heat exchange tube during welding. When the welding is completed, the argon source is turned off and the exhaust valve is opened to extract the argon.

[0030] Working principle: When this protection device is used, adjust the adjustment block 6 to make the rotating ring 8 rotate so that the sliding rod 7 drives the heat-resistant rubber rings 4 on both sides to open, and then put it on the place where the heat exchange tube needs to be welded. After the position is determined, adjust the adjustment block 6 again to make the heat-resistant rubber ring 4 shrink, and its inner ring will fit tightly against the outer wall of the heat exchange tube, improving the gas sealing performance of the device when in use. Connect the argon source through the air inlet 2 and the exhaust valve through the air outlet 3. During welding, introduce argon and close the exhaust valve. The argon will protect the back of the welded heat exchange tube under the joint guidance of the vent plate 9 and the pore ring 10 inside the gas cylinder 1. The argon will be transmitted downward through the small holes set in the vent plate 9. The pore ring 10 is set to prevent excessive accumulation of argon in the lower part, which will reduce the protection effect when welding the upper part. When welding is completed, turn off the argon source and open the exhaust valve to extract the argon from the air outlet 3. Then adjust the adjustment block 6 again to loosen the device from the outer wall of the heat exchange tube and move it to the next welding place to perform welding again.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Inner hole weld back protection device, characterized in that: The invention comprises a gas cylinder (1) serving as a gas chamber, wherein the inner walls on both sides of the gas cylinder (1) are slidably connected to a rotating ring (8), and a plurality of sliding arc grooves (14) are provided inside the rotating rings (8) on both sides. The top ends of the rotating rings (8) on both sides are fixedly connected to an adjusting block (6), and the outer end of the adjusting block (6) passes through the outer wall of the gas cylinder (1). The adjusting block (6) is connected to a heat-resistant rubber ring (4) through an adjusting component, and the relative inner ends of the heat-resistant rubber ring (4) are fitted to the left and right ends of the gas cylinder (1) so as to adjust the size of the heat-resistant rubber ring (4) by setting the adjusting block (6) to achieve a sealing effect of the device.

2. The inner hole weld back protection device according to claim 1, characterized in that: The adjustment assembly includes a plurality of sliding rods (7) fixedly connected to the inner end relative to the heat-resistant rubber ring (4), the outer walls of the sliding rods (7) are all slidably connected to the inside of the sliding arc groove (14) on the inner side, and a plurality of movable grooves (13) are opened inside the gas cylinder (1), and the outer walls of the sliding rods (7) are all slidably connected to the inside of the movable groove (13) on the outer side.

3. The inner hole weld back protection device according to claim 1, characterized in that: The left and right sides of the top of the gas cylinder (1) are fixedly connected to fixed blocks (5), and the two sides of the inner wall of the fixed block (5) are fixedly connected to a plurality of limiting tooth blocks (11).

4. The inner hole weld back protection device according to claim 1, characterized in that: The adjusting block (6) is provided with elastic grooves (12) on both the inner and outer sides, and the adjusting block (6) is provided with a plurality of tooth blocks on the outer wall corresponding to the elastic grooves (12).

5. The inner hole weld back protection device according to claim 1, characterized in that: The left side of the top end of the gas cylinder (1) is fixedly connected to an air inlet (2), and the right side of the top end of the gas cylinder (1) is fixedly connected to an air outlet (3).

6. The inner hole weld back protection device according to claim 1, characterized in that: An air hole ring (10) is fixedly connected to the interior of the gas cylinder (1), and the thickness of the gas cylinder (1) at the position corresponding to the air hole ring (10) is smaller than the thickness at both ends.

7. The inner hole weld back protection device according to claim 6, characterized in that: A plurality of gas sinking plates (15) are fixedly connected to the outer wall of the pore ring (10), the outer ends of the gas sinking plates (15) are fixedly connected to the inner wall of the gas cylinder (1), and the inner ends of the gas sinking plates (15) are fixedly connected to the outer wall of the pore ring (10).

8. The inner hole weld back protection device according to claim 7, characterized in that: The inner ends of adjacent gas sinking plates (15) are commonly connected to a ventilation plate (9), the outer ends of the ventilation plates (9) are fixedly connected to the inner wall of the gas cylinder (1), and the inner ends of the ventilation plates (9) are fixedly connected to the outer wall of the air hole ring (10).

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