Positioning tool for welding process of explosion-proof plate and using method thereof

Abstract

The present application relates to the technical field of explosion-proof plate, in particular to a positioning tool for welding processing of explosion-proof plate and a using method thereof, comprising a chassis, an adjusting device is arranged in the chassis, and the adjusting device comprises an adjusting disc rotatably installed with the chassis, and an operating device is arranged on the chassis for driving the adjusting disc to rotate through self-rotation. The positioning tool designed by the present application can drive the adjusting disc to rotate by rotating the hand wheel, the adjusting disc can drive the rotating plate to rotate to determine whether to position the positioning clamping hook by the rotating plate, meanwhile, the adjusting disc can also control whether the clamping arm is fixed with the keel by rotating, and the hand wheel rotation will also drive the top pressing block to press and fix the explosion-proof plate, so that all positioning and fixing work can be completed by operating the hand wheel, which is simple to operate and has high fault tolerance. The present application solves the problem of difficult positioning and fixing of explosion-proof plate during welding, and can effectively improve the welding and installation efficiency of explosion-proof plate.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof plate technology, specifically to a positioning fixture for welding explosion-proof plates and its usage method. Background Technology

[0002] Explosion-proof panels are explosion-proof protective materials specifically designed and manufactured to reduce economic losses during explosions. They are widely used in explosion-proof protection systems for dust removal equipment, conveying equipment, silos, dust pipelines, dust workshops, high-voltage electrical cabinets, and energy storage cabinets. Explosion-proof panels are generally composed of a metal plate with high-strength inorganic non-metallic materials such as fiber cement board sandwiched between it, thereby improving the overall structural stability and fire resistance.

[0003] Traditionally, explosion-proof panels are installed by first erecting a keel, then bolting them through pre-drilled holes in the panels to form a blast-proof wall. However, this bolting method damages the material structure of the explosion-proof panels, reducing the wall's sealing performance. Furthermore, the numerous exposed bolts affect the aesthetics, and the lack of effective sealing and connection at the joints between panels also impacts the wall's usability. Welding from the inside of the keel avoids these problems, but the current welding method is cumbersome for positioning and fixing the panels, easily leading to misalignment and affecting performance.

[0004] Therefore, we need a positioning fixture and its usage method for welding explosion-proof plates to solve the problem of positioning and fixing explosion-proof plates during welding. This can effectively improve the welding and installation efficiency of explosion-proof plates and bring new possibilities to the installation of explosion-proof plates. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of difficulty in positioning and fixing explosion-proof plates during welding. This application provides a positioning fixture for welding explosion-proof plates and its usage method, which can effectively improve the welding and installation efficiency of explosion-proof plates.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for welding explosion-proof plates, comprising:

[0007] A base frame, wherein an adjustment device is provided inside the base frame, and the adjustment device includes an adjustment disc rotatably mounted to the base frame, and an operating device is provided on the base frame for driving the adjustment disc to rotate by rotating itself.

[0008] The positioning device includes at least four limiting arms arranged in a circular array and fixed to the base frame. Each limiting arm has a limiting groove that cooperates with a positioning hook installed on the explosion-proof plate for positioning. A first rotating shaft is rotatably mounted on the limiting arm and is driven to rotate by an adjusting disc. A rotating plate is fixedly mounted on the first rotating shaft for clamping at the bottom of the positioning hook to fix the explosion-proof plate.

[0009] The fixing device includes four second slide rods arranged in a circumferential array and slidably installed in the base frame. The first end of the second slide rod is clamped to the keel by a clamping arm. The end of the second slide rod is fixedly installed with a limit block. The adjusting plate has an arc-shaped guide groove that engages with the limit block and guides the movement of the limit block.

[0010] Preferably, the operating device includes a screw rod that is screwed to the base frame, a handwheel that is fixedly installed on the top of the screw rod, a locking groove that is fixedly installed on the bottom of the screw rod, and a mating positioning block that is integrally formed on the adjusting plate and locked in the locking groove.

[0011] Preferably, a pressing block for pressing the explosion-proof plate is fixedly installed at the bottom of the screw, and an anti-detachment ring for preventing the adjusting plate from falling off the bottom of the base plate is fixedly installed at the bottom of the base frame.

[0012] Preferably, a second rotating shaft and a third rotating shaft are rotatably mounted on the limiting arm, and a third gear is fixedly mounted on the second rotating shaft. A first gear and a second gear are coaxially fixedly mounted on the third rotating shaft, and the second gear and the third gear are meshed together. The first rotating shaft is connected to the second rotating shaft through a toothed belt, and a toothed ring is provided on the adjusting disc, which meshes with the first gear.

[0013] Preferably, the gears on the gear ring, the first gear, the second gear, and the third gear have the same module, and the transmission ratio between the gear ring and the third gear is 2:1.

[0014] Preferably, the clamping arm is an L-shaped plate, and an elastic pad is provided at the position where the clamping arm contacts the keel.

[0015] Preferably, a guide sleeve is fixedly installed at the end of the second slide rod, and a first slide rod is integrally formed on the clamping arm and slidably installed with the guide sleeve. An adjusting screw for adjusting the position of the clamping arm is screwed onto the guide sleeve, and the end of the adjusting screw is rotatably installed with the clamping arm.

[0016] Preferably, a guide rod is fixedly installed on the clamping arm and slidably installed on the guide sleeve, and a collar is integrally formed on the guide sleeve to guide the movement direction of the second slide rod.

[0017] Preferably, a shock-absorbing pad is provided at the position where the bottom of the base frame contacts the explosion-proof plate, and the adjusting plate is installed with the base frame via a bearing.

[0018] A method for using a positioning fixture for welding explosion-proof plates includes the following steps:

[0019] Step 1: First, install the keel at the construction site, and then place the positioning fixture behind the keel so that the four clamping arms contact the keel from the corresponding directions.

[0020] Step 2: Rotate the operating device 90 degrees counterclockwise, thereby using the operating device to drive the adjustment plate to rotate, causing the arc-shaped guide groove to push the limit block to move outward of the base frame, thereby using the limit block to drive the clamping arm to clamp onto the keel;

[0021] Step 3: Place the explosion-proof plate at the front end of the keel and make the four positioning hooks on the explosion-proof plate enter the corresponding limit slots respectively. Then continue to rotate the operating device counterclockwise by 90 degrees. At this time, the rotating plate will be driven by the adjusting plate and locked into the bottom of the positioning hooks to complete the fixing of the explosion-proof plate.

[0022] Step 4: Weld the explosion-proof plate to the keel from the rear. After welding, rotate the operating device counterclockwise to the initial position so that the rotating plate rotates out from under the positioning hook and is not fixed to the explosion-proof plate. At the same time, the adjusting plate drives the clamping arm to retract inward and disengage from the clamping state with the keel. At this time, remove the positioning fixture from the rear of the keel and place it in the new working position.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This invention proposes a positioning fixture for welding explosion-proof panels and its usage method. By rotating a handwheel, an adjusting disc is driven to rotate, which in turn drives a rotating plate to determine whether the positioning hook is positioned using the rotating plate. Simultaneously, the adjusting disc's rotation controls whether the clamping arm is fixed to the keel. Furthermore, the handwheel's rotation also drives a pressure block to press and fix the explosion-proof panel. Therefore, by operating the handwheel, the positioning fixture can be fixed to the keel, the explosion-proof panel can be positioned using the rotating plate, and the explosion-proof panel can be fixed to the keel using the rotating plate and the pressure block. This enriches the handwheel's functionality, and the entire process is simple for operators with a high tolerance for error. This solves the problem of difficult positioning and fixing of explosion-proof panels during welding, effectively improving the efficiency of explosion-proof panel welding and installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation of the explosion-proof plate of the present invention;

[0026] Figure 2This is a schematic diagram showing the installation of the positioning device and the explosion-proof plate of the present invention;

[0027] Figure 3 This is a schematic diagram of the installation of the base frame and fixing device of the present invention;

[0028] Figure 4 This is a schematic diagram of the explosion-proof plate of the present invention;

[0029] Figure 5 This is an internal sectional view of the base frame of the present invention;

[0030] Figure 6 This is a schematic diagram of the fixing device of the present invention;

[0031] Figure 7 This is a schematic diagram of the positioning device of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the operating device of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the regulating device of the present invention.

[0034] In the diagram: 1. Keel; 2. Operating device; 201. Handwheel; 202. Screw; 203. Clamping groove; 204. Top pressure block; 3. Positioning device; 301. Limiting groove; 302. Limiting arm; 303. Rotating plate; 304. First rotating shaft; 305. Toothed belt; 306. Third gear; 307. Second rotating shaft; 308. First gear; 309. Third rotating shaft; 310. Second gear; 4. Fixing Device; 401, clamping arm; 402, adjusting screw; 403, first slide rod; 404, guide rod; 405, guide sleeve; 406, collar; 407, second slide rod; 408, limiting block; 5, base frame; 6, explosion-proof plate; 7, positioning hook; 8, adjusting device; 801, adjusting plate; 802, mating positioning block; 803, arc-shaped guide groove; 804, gear ring; 9, elastic pad; 10, anti-detachment ring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0039] Example 1

[0040] Please see Figures 1 to 9 This invention provides a technical solution: a positioning fixture for welding explosion-proof plates, comprising:

[0041] Base frame 5, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5An adjustment device 8 is provided inside the base frame 5, and the adjustment device 8 includes an adjustment disc 801 rotatably mounted to the base frame 5. An operating device 2 is provided on the base frame 5 for driving the adjustment disc 801 to rotate by its own rotation. The operating device 2 includes a screw 202 screwed to the base frame 5, and a handwheel 201 is fixedly mounted on the top of the screw 202. A locking groove 203 is fixedly mounted on the bottom of the screw 202. A mating positioning block 802 is integrally formed on the adjustment disc 801 and is locked to the locking groove 203. The cooperation between 203 and the positioning block 802 enables the screw 202 to drive the adjusting plate 801 to rotate, while the adjusting plate 801 does not restrict the up and down movement of the screw 202. The bottom of the screw 202 is fixedly installed with a pressing block 204 for pressing the explosion-proof plate 6, and the bottom of the base frame 5 is fixedly installed with an anti-detachment ring 10 to prevent the adjusting plate 801 from falling off the bottom of the base plate 5. A shock-absorbing pad is provided at the position where the bottom of the base frame 5 contacts the explosion-proof plate 6, and the adjusting plate 801 and the base frame 5 are installed through a bearing.

[0042] Positioning device 3, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7The positioning device 3 includes at least four limiting arms 302 arranged in a circular array and fixed to the base frame 5. Each limiting arm 302 has a limiting groove 301 that engages with a positioning hook 7 mounted on the explosion-proof plate 6. When all four positioning hooks 7 on the explosion-proof plate 6 can enter the corresponding limiting groove 301 on the same base frame 5, the explosion-proof plate 6 is correctly positioned. At this time, the explosion-proof plate 6 is in the correct installation position. A first rotating shaft 304 is rotatably mounted on the limiting arm 302, and the first rotating shaft 304 is adjustable. The 801-driven disc rotates. A rotating plate 303 is fixedly mounted on the first rotating shaft 304 to secure the explosion-proof plate 6 by clamping it to the bottom of the positioning hook 7. A second rotating shaft 307 and a third rotating shaft 309 are rotatably mounted on the limiting arm 302. A third gear 306 is fixedly mounted on the second rotating shaft 307. A first gear 308 and a second gear 310 are coaxially fixedly mounted on the third rotating shaft 309, and the second gear 310 and the third gear 306 are meshed together. The first rotating shaft 304 is connected by a toothed belt 305. The second rotating shaft 307 is connected to the adjusting disc 801, which is equipped with a gear ring 804. The gear ring 804 meshes with the first gear 308. The gear ring 804, the first gear 308, the second gear 310, and the third gear 306 have the same module of teeth, and the transmission ratio between the gear ring 804 and the third gear 306 is 2:1. This forms a reduction transmission from the gear ring 804 to the second rotating shaft 307. When the handwheel 201 rotates half a turn, the second rotating shaft 307 rotates ninety degrees. Therefore, the second rotating shaft 307 just... It can drive the rotating plate 303 from the non-working position to the working position where it is locked with the positioning hook 7, or rotate the rotating plate 303 from the working position where it is locked with the positioning hook 7 to the non-working position. When 303 is locked under the positioning hook 7, the screw 202 also drives the top pressing block 204 to press against the back of the explosion-proof plate 6. Under the pressure of the top pressing block 204, the rotating plate 303 will also be tightly attached to the positioning hook 7, thereby preventing the explosion-proof plate 6 from moving back and forth and achieving complete fixation of the explosion-proof plate 6.

[0043] Fixture 3, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6The fixing device 4 includes four second slide rods 407 arranged in a circular array and slidably mounted within the base frame 5. The first end of each second slide rod 407 is clamped onto the keel 1 via a clamping arm 401. A limit block 408 is fixedly mounted at the end of each second slide rod 407. An arc-shaped guide groove 803 is provided on the adjusting plate 801 to engage with the limit block 408 and guide its movement. The clamping arm 401 is an L-shaped plate, which fits the shape of the keel 1 well, allowing the operator to... The L-shaped plate, perpendicular to the explosion-proof plate 6, clamps the inner side of the keel 1. It can also be clamped to the outer side of the keel 1 by the L-shaped plate, parallel to the explosion-proof plate 6, ensuring the positioning fixture is inserted to the specified depth into the front end of the keel 1. This ensures the rotating plate 303 can correctly engage below the positioning hook 7, saving preparation time for installing the positioning fixture on the keel. An elastic pad 9 is provided at the contact point between the clamping arm 401 and the keel 1. When the operator moves along... When the handwheel 201 is rotated counterclockwise, the screw 202 will move along the base frame 5 towards the bottom of the base frame 5. At the same time, the locking groove 203 at the end of the screw 202 will drive the adjusting plate 801 to rotate counterclockwise through the engagement with the positioning block 802. Since the limiting block 408 is located in the arc-shaped guide groove 803 and forms a form lock with the arc-shaped guide groove 803, when the adjusting plate 801 rotates counterclockwise, the limiting block 408 will change its engagement position with the arc-shaped guide groove 803. When the limit block 408 is moved outward by the arc-shaped guide groove 803, the second slide bar 407 drives the clamping arm 401 to clamp tightly onto the keel 1, thus fixing the base frame 5 onto the keel 1. Conversely, when the operator rotates the handwheel 201 clockwise, the adjusting disc 801 will drive the clamping arm 401 to retract inward into the base frame 5 through the arc-shaped guide groove 803, thereby disengaging the clamping arm 401 from the clamping state on the keel 1.

[0044] In this embodiment, rotating the handwheel 201 drives the adjusting plate 801 to rotate, which in turn drives the rotating plate 303 to rotate, thus determining whether to use the rotating plate 303 to position the positioning hook 7. Simultaneously, the adjusting plate 801 can also control whether the clamping arm 401 is fixed to the keel 1 by rotation. When the handwheel 201 rotates, it also drives the top pressure block 204 to press and fix the explosion-proof plate 6. Therefore, by operating the handwheel 201, the positioning fixture can be fixed to the keel 1, the explosion-proof plate 6 can be positioned by the rotating plate 303, and the explosion-proof plate 6 can be fixed to the keel 1 by the rotating plate 303 and the top pressure block 204. This enriches the function of the handwheel 201, and the entire process is simple for the operator with a high tolerance for error. This solves the problem of difficult positioning and fixing of the explosion-proof plate during welding, effectively improving the welding and installation efficiency of the explosion-proof plate. Since the explosion-proof plate 6 used in this embodiment is weldable, it is also possible to pre-weld a flange to the explosion-proof plate 6 and then use the flange to connect to the keel 1 with bolts, so that the explosion-proof plate 6 can be applied to more application scenarios.

[0045] Example 2

[0046] Refer to the attached diagram. Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 Based on Embodiment 1, a guide sleeve 405 is fixedly installed at the end of the second slide rod 407, and a first slide rod 403 is integrally formed on the clamping arm 401 and slidably installed with the guide sleeve 405. An adjusting screw 402 for adjusting the position of the clamping arm 401 is screwed onto the guide sleeve 405, and the end of the adjusting screw 402 is rotatably installed with the clamping arm 401. A guide rod 404 is fixedly installed on the clamping arm 401 and slidably installed with the guide sleeve 405, and a guide rod 404 sleeved on the base frame 5 is integrally formed on the guide sleeve 405 for adjusting the position of the first slide rod 403. The collar 406 guides the movement direction of the second slide rod 407. When the adjusting screw 402 is turned, the adjusting screw 402 will drive the clamping arm 401 to move, thereby causing the first slide rod 403 to slide along the guide sleeve 405. In this way, the position of the clamping arm 401 can be finely adjusted by adjusting the adjusting screw 402, which facilitates the quick docking of the clamping arm 401 with keels 1 of different sizes. This further solves the problem of difficult positioning and fixing of explosion-proof plates when welding explosion-proof plates, and can effectively improve the welding and installation efficiency of explosion-proof plates.

[0047] Example 3

[0048] Based on Embodiment 2, the present invention also provides a method for using a positioning fixture for welding explosion-proof plates, comprising the following steps:

[0049] Step 1: First, install the keel 1 at the construction site, and then place the positioning fixture behind the keel 1 so that the four clamping arms 401 contact the keel 1 from the corresponding direction. When there is a deviation between the size of the keel 1 and the preset length of the clamping arm 401, adjust the extension length of the corresponding clamping arm 401 by adjusting the screw 402 to ensure that the clamping arm 401 can contact the keel 1 at the specified interval.

[0050] Step 2: Rotate the operating device 2 counterclockwise by 90 degrees, thereby driving the adjusting plate 801 to rotate. This causes the arc-shaped guide groove 803 to push the limiting block 408 to move outward from the base frame 5. The limiting block 408 then drives the clamping arm 401 to clamp onto the keel 1. At this point, the keel 1 can be used to fix the positioning fixture. The clamping force between the clamping arm 401 and the keel 1 is only enough to ensure that the positioning fixture does not shift. The elastic pad on the clamping arm 401 can still be compressed.

[0051] Step 3: Place the explosion-proof plate 6 at the front end of the keel 1 and ensure that the four positioning hooks 7 on the explosion-proof plate 6 are respectively placed into the corresponding limiting grooves 301. Then, continue to rotate the operating device 2 counterclockwise by 90 degrees. At this time, the rotating plate 303 will be driven by the adjusting plate 801 and inserted into the lower part of the positioning hooks 7. At the same time, the clamping arm 401 will continue to be pushed towards the keel 1, so that the elastic pad 9 is completely compressed, thereby making the positioning device completely fixed to the keel 1. Meanwhile, since the handwheel 201 will also drive the top pressing block 204 to press against the rear end of the explosion-proof plate 6, the gap between the contact surface of the explosion-proof plate 6 and the rotating plate 303 will be eliminated. Thus, the rotating plate 303 and the keel 1 can completely restrict the forward and backward movement of the explosion-proof plate 6. Since the cooperation between the four positioning hooks 7 and the four limiting grooves 301 has restricted the up and down movement and left and right movement of the explosion-proof plate 6, the explosion-proof plate 6 can be completely fixed and correctly positioned.

[0052] Step 4: Weld the explosion-proof plate 6 to the keel 1 from the rear. After welding, rotate the operating device 2 counterclockwise to the initial position, so that the rotating plate 303 rotates out from under the positioning hook 7 and is released from the fixation of the explosion-proof plate 6. At the same time, the adjusting plate 801 drives the clamping arm 401 to retract inward and release from the clamping state with the keel 1. At this time, take out the positioning fixture from the rear of the keel 1 and place it in the new working position to start the next round of work. After all the explosion-proof plates 6 are installed on the keel 1, the joints between adjacent explosion-proof plates 6 can be welded from the front end of the installed explosion-proof plates 6 to further enhance the structural strength.

[0053] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A positioning fixture for welding explosion-proof plates, characterized in that, include: The base frame (5) is provided with an adjustment device (8), and the adjustment device (8) includes an adjustment disk (801) rotatably mounted with the base frame (5). The base frame (5) is provided with an operating device (2) for driving the adjustment disk (801) to rotate by its own rotation. The positioning device (3) includes at least four limiting arms (302) arranged in a circular array and fixed to the base frame (5). The limiting arms (302) are provided with limiting grooves (301) that cooperate with the positioning hooks (7) installed on the explosion-proof plate (6). A first rotating shaft (304) is rotatably mounted on the limiting arms (302). The first rotating shaft (304) is driven to rotate by the adjusting plate (801). A rotating plate (303) is fixedly mounted on the first rotating shaft (304) for clamping at the bottom of the positioning hooks (7) to fix the explosion-proof plate (6). The fixing device (4) includes four second slide rods (407) arranged in a circular array and slidably installed in the base frame (5). The first end of the second slide rod (407) is clamped on the keel (1) by a clamping arm (401). The end of the second slide rod (407) is fixedly installed with a limit block (408). The adjusting plate (801) is provided with an arc-shaped guide groove (803) that is shaped and locked with the limit block (408) and is used to guide the movement of the limit block (408). The limiting arm (302) is rotatably mounted with a second rotating shaft (307) and a third rotating shaft (309), and a third gear (306) is fixedly mounted on the second rotating shaft (307). A first gear (308) and a second gear (310) are coaxially fixedly mounted on the third rotating shaft (309), and the second gear (310) and the third gear (306) are meshed together. The first rotating shaft (304) is connected to the second rotating shaft (307) through a toothed belt (305), and a gear ring (804) is provided on the adjusting disc (801). The gear ring (804) is meshed with the first gear (308). The gears on the gear ring (804), the first gear (308), the second gear (310), and the third gear (306) have the same module, and the transmission ratio between the gear ring (804) and the third gear (306) is 2:

1.

2. The positioning fixture for welding explosion-proof plates according to claim 1, characterized in that: The operating device (2) includes a screw (202) screwed to the base frame (5), and a handwheel (201) is fixedly installed on the top of the screw (202). A locking groove (203) is fixedly installed on the bottom of the screw (202), and a mating positioning block (802) is integrally formed on the adjusting plate (801) and is locked to the locking groove (203).

3. The positioning fixture for welding explosion-proof plates according to claim 2, characterized in that: The bottom of the screw (202) is fixedly installed with a pressing block (204) for pressing the explosion-proof plate (6), and the bottom of the base frame (5) is fixedly installed with an anti-detachment ring (10) for preventing the adjusting plate (801) from falling off the bottom of the base frame (5).

4. The positioning fixture for welding explosion-proof plates according to claim 1, characterized in that: The clamping arm (401) is an L-shaped plate, and an elastic pad (9) is provided at the position where the clamping arm (401) contacts the keel (1).

5. The positioning fixture for welding explosion-proof plates according to claim 1, characterized in that: The second slide rod (407) has a guide sleeve (405) fixedly installed at its end, and a first slide rod (403) is integrally formed on the clamping arm (401) and slidably installed with the guide sleeve (405). An adjusting screw (402) for adjusting the position of the clamping arm (401) is screwed onto the guide sleeve (405), and the end of the adjusting screw (402) is rotatably installed with the clamping arm (401).

6. The positioning fixture for welding explosion-proof plates according to claim 5, characterized in that: The clamping arm (401) is fixedly installed with a guide rod (404) that is slidably installed with the guide sleeve (405), and the guide sleeve (405) is integrally formed with a collar (406) that is sleeved on the base frame (5) to guide the movement direction of the second slide rod (407).

7. The positioning fixture for welding explosion-proof plates according to claim 1, characterized in that: A shock-absorbing pad is provided at the position where the bottom of the base frame (5) contacts the explosion-proof plate (6), and the adjustment plate (801) is installed with the base frame (5) through a bearing.

8. The method of using the positioning fixture for welding explosion-proof plates as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: First, install the keel (1) at the construction site, and then place the positioning fixture behind the keel (1) so that the four clamping arms (401) contact the keel (1) from the corresponding directions. Step 2: Rotate the operating device (2) 90 degrees counterclockwise, thereby using the operating device (2) to drive the adjusting plate (801) to rotate, so that the arc-shaped guide groove (803) pushes the limiting block (408) to move to the outside of the base frame (5), thereby using the limiting block (408) to drive the clamping arm (401) to clamp onto the keel (1); Step 3: Place the explosion-proof plate (6) at the front end of the keel (1) and make the four positioning hooks (7) on the explosion-proof plate (6) respectively put into the corresponding limiting grooves (301). Then continue to rotate the operating device (2) counterclockwise by 90 degrees. At this time, the rotating plate (303) will be driven by the adjusting plate (801) and inserted into the lower part of the positioning hooks (7) to complete the fixing of the explosion-proof plate (6). Step 4: Weld the explosion-proof plate (6) to the keel (1) from the back. After welding, rotate the operating device (2) counterclockwise to the initial position so that the rotating plate (303) rotates out from under the positioning hook (7) and is released from the fixing of the explosion-proof plate (6). At the same time, the adjusting plate (801) drives the clamping arm (401) to retract inward and release from the clamping state with the keel (1). At this time, the positioning fixture can be taken out from the back of the keel (1) and placed in the new working position.

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