Plasma underwater cutting platform jig frame

Abstract

According to the plasma underwater cutting platform jig frame, a water tank is fixed to the ground through a plurality of hydraulic jacking devices, each hydraulic jacking device is composed of a hydraulic cylinder and a hydraulic rod, the hydraulic rods stretch out and draw back up and down relative to the hydraulic cylinders, the hydraulic rods are fixedly connected with the lower surface of the water tank, and the hydraulic cylinders are fixedly connected with the ground. The suspension frame is suspended, the water tank is located below the suspension frame, the frame size of the water tank is larger than that of the suspension frame, and the suspension frame can be completely embedded in the water tank. The hanging frame is a grid type frame, the grid platform is placed in the hanging frame, grids formed by the grid platform are smaller than grids formed by the hanging frame, and a steel plate to be cut is placed on the grid platform. Free combination of the jig frame can be achieved according to the site size, and high flexible assembling performance is achieved. The cutting steel plate is fixed on the hanging frame, so that the steel plate cannot move along with the lifting of the water tank, the blanking precision is effectively improved, and the possibility that the precision of jig frame parts is influenced after long-time use is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of shipbuilding and design, and particularly relates to a plasma underwater cutting platform jig. Background Art

[0002] With the application of plasma cutting technology, at present, some enterprises have carried out research on new plasma cutting processes with the goals of high-quality, high-efficiency, and low-cost cutting. New processes such as water jet plasma cutting, compressed air plasma cutting, low-current plasma cutting, and oxygen plasma cutting have emerged one after another, and underwater plasma cutting technology has also been successfully realized. The emergence of these new processes is a major technological progress in plasma cutting technology, which has greatly improved the cutting quality and cutting speed.

[0003] Compared with flame cutting, plasma cutting has the characteristics of fast cutting speed, good cutting quality, small heat affected zone, and no deformation of the workpiece. However, the noise, dust, and strong arc light generated during the cutting process also highlight the environmental pollution and the physical harm to the operators. Underwater plasma cutting can better solve this problem. Underwater plasma cutting is to place the plasma cutting torch head at the horizontal plane, and the cutting piece is placed on the working platform of the water jig. The part is about 15 mm deep from the water surface, and the cutting process is carried out entirely in water, effectively reducing the hazards such as noise, dust, metal dust, and arc light during plasma cutting.

[0004] Through on-site visits and data investigations, it is found that ordinary plasma underwater cutting platforms use the method of air pressure difference to achieve cutting. During the use of the air box jig, three problems are found: First, the thickness of the steel plate to be cut is generally between 5 mm and 50 mm, and the weight ranges from 0.8 tons to 8 tons. It is necessary to adjust the inflation pressure according to the actual situation, and the operation process is relatively complex. Second, the steel plate needs to be cut on the air box. During the blanking and cutting process, the air box needs to be inflated for a long time to prevent it from moving up and down, otherwise it will affect the accuracy of the cutting part size. Finally, when cutting the steel plate, although there is a protection structure between the air box and the steel plate, due to the erosion of water and the long-term swinging and cutting of the plasma torch nozzle above the air box, the air box may leak air, causing casualties and potential safety hazards. Therefore, it is very necessary to design and manufacture an excellent underwater cutting platform jig. Summary of the Invention

[0005] To solve the above problems, the present invention provides a plasma underwater cutting platform jig, and the technical solution adopted is as follows:

[0006] A plasma underwater cutting platform jig, comprising a water tank, a suspension frame and a grid platform. The water tank is fixed on the ground by a plurality of hydraulic lifting devices. A water outlet pipe and a water inlet pipe are arranged on the water tank body. The hydraulic lifting device consists of a hydraulic cylinder and a hydraulic rod. The hydraulic rod telescopically moves up and down relative to the hydraulic cylinder. The hydraulic rod is fixedly connected to the lower surface of the water tank, and the hydraulic cylinder is fixedly connected to the ground.

[0007] A plurality of gussets are equidistantly arranged at the edge of the suspension frame. The bottom of the gusset is provided with a fixing plate, and the fixing plate is fixed to the top end of the foundation by bolts. The foundation is cylindrical, the bottom of the foundation is fixed on the ground, and a connecting piece protrudes from the top and is fixedly connected to the edge of the suspension frame. The suspension frame is suspended, the water tank is located below the suspension frame, the size of the water tank is larger than that of the suspension frame, and the suspension frame can be completely buried in the water tank.

[0008] The suspension frame is a grid-type frame, and the grid platform is placed in the suspension frame. The grid formed by the grid platform is smaller than the grid formed by the suspension frame. The steel plate to be cut is placed on the grid platform.

[0009] The specific operation steps are as follows:

[0010] S1: Use a bridge crane in the blanking workshop to place a 10*2000*10000 steel plate on the grid platform;

[0011] S2: Use the hydraulic jacking device to slowly lift the water tank and adjust the water level to be 15 mm higher than the cutting steel plate;

[0012] S3: Check the cutting head and related components to ensure they are intact;

[0013] S4: The operator starts the plasma cutting machine, performs cutting operations according to the set parameters, controls the movement of the cutting head, and maintains an appropriate cutting distance and angle. During the cutting process, ensure the normal operation of the water supply and drainage systems and keep them clean;

[0014] S5: After completing the cutting task, turn off the plasma cutting machine and move the cutting head to a safe position;

[0015] S6: Use the hydraulic jacking device to lower the water tank below the cut piece, and the construction workers perform work such as marking the parts and picking up the materials.

[0016] For the above-mentioned plasma underwater cutting platform jig, further, the water tank, the suspension frame and the grid platform are all rectangular, and a plurality of water tanks, suspension frames and grid platforms are freely combined into an underwater cutting platform jig of any size or shape.

[0017] For the above-mentioned plasma underwater cutting platform jig, further, the foundation is a concrete column, and a plurality of foundations are equidistantly arranged along the circumference of the suspension frame.

[0018] For the above-mentioned plasma underwater cutting platform jig, further, a plurality of hydraulic lifting devices are arranged at equal intervals inside the foundation.

[0019] For the above-mentioned plasma underwater cutting platform jig, further, ball valves for adjusting the water level are installed on the water outlet pipe and the water inlet pipe.

[0020] For the above-mentioned plasma underwater cutting platform jig, further, the water outlet pipe and the water inlet pipe are connected to an external water source through a water pump.

[0021] For the above-mentioned plasma underwater cutting platform jig, further, the grid spacing of the grid platform is 100 mm.

[0022] For the above-mentioned plasma underwater cutting platform jig, further, the bracket base is fixed to the foundation by bolts.

[0023] For the above-mentioned plasma underwater cutting platform jig, further, reinforcing ribs are welded inside the water tank.

[0024] For the above-mentioned plasma underwater cutting platform jig, further, when a plurality of water tanks are spliced, the gap between adjacent water tanks is 30 mm.

[0025] Through precise design and function optimization, the platform of the present invention can perform efficient and precise cutting operations in an underwater environment. The device of the present invention uses expansion studs for stable connection. According to the site size, the jig can be freely combined and has high flexible assembly. Compared with the ordinary underwater cutting air pressure difference water tank jig, the present invention fixes the cutting steel plate on the suspension frame, so that the steel plate will not be displaced with the rise and fall of the water tank, thereby effectively improving the blanking accuracy. At the same time, the present invention reduces the possibility that the accuracy of the jig parts is affected during long-term use, providing a strong guarantee for realizing efficient and precise cutting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic diagram of the water tank structure;

[0028] Figure 3 is a schematic diagram of the suspension frame structure;

[0029] Figure 4 is a schematic diagram of the grid platform structure;

[0030] Wherein: 1 - water tank, 2 - hydraulic lifting device, 3 - suspension frame, 4 - bracket, 5 - foundation, 6 - grid platform, 7 - water inlet pipe, 8 - water outlet pipe. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] As Figure 1 shown, a plasma underwater cutting platform jig includes a water tank, a suspension frame and a grid platform. The water tank is made of Q235B material with a thickness of T = 8mm, and after welding, it is sprayed with epoxy primer and polyurethane topcoat. The water tank has corrosion resistance and water pressure resistance. As Figure 2 shown, the water tank has dimensions of length 12m * width 5m * height 0.4m, and the number is 2. They are placed side by side, and the gap between the two water tanks is about 30mm. Reinforcing ribs are welded inside to ensure the strength of the water tank. The water tank is fixed to the ground by a plurality of hydraulic lifting devices. The hydraulic lifting device consists of a hydraulic cylinder and a hydraulic rod. The hydraulic rod can stretch up and down relative to the hydraulic cylinder. The hydraulic rod is fixedly connected to the lower surface of the water tank, and the hydraulic cylinder is fixedly connected to the ground. The hydraulic extension device is used to control the lifting of the water tank body, providing stable support and precise positioning during the plasma cutting process. At a total of 5 support points, namely the 4 corners and the center of gravity of the water tank, extension fulcrums are set. Lifting pressure is provided through the hydraulic system. The two water tanks can be lifted simultaneously or the lifting process of each water tank can be controlled separately. Through precise system control methods, precise adjustment of the position of the cutting device can be achieved.

[0033] As Figure 3 shown, a plurality of gussets are arranged at equal intervals on the edge of the suspension frame. The bottom of the gusset is provided with a fixing plate, and the fixing plate is fixedly connected to the top end of the foundation through bolts. The foundation is placed on the ground and is a square column. The top of the gusset projects a connecting piece, which is fixedly connected to the suspension frame through the connecting piece. The suspension frame is suspended, and the water tank is located below the suspension frame. The border dimension of the water tank is larger than that of the suspension frame border, and the suspension frame can be completely buried in the water tank.

[0034] The suspension frame is the core component for suspending the grid platform inside the water tank. The base is tightened to the foundation using M48 * 120 expansion studs to enable it to operate smoothly and maintain good stability. The suspension frame uses T200 * 100 * 8 / 12 profiles as the frame, T = 30mm, 1000 in length * 800 in width gussets as the support plates, and T = 30, 600 in length * 600 in width plates as the base. The materials have corrosion resistance and rigidity. Through careful design and optimization, it is ensured that the cutting device can be accurately positioned and stably operated in the underwater environment. The suspension frame is a grid-type frame, and the grid platform is placed inside the suspension frame. The grid formed by the grid platform is smaller than the grid formed by the suspension frame. The steel plate to be cut is placed on the grid platform.

[0035] As Figure 4As shown, the grid platform is to prevent small parts from falling into the water tank during the cutting process. Fixing the grid platform can ensure a stable working platform. The grid platform is composed of flat iron with a thickness of T = 5mm and a width of 100mm welded together. The material is Q235B and no paint is applied. The designed grid spacing is 100mm and the longitudinal spacing is 1613mm to meet the requirements during the cutting process.

[0036] The water tank body is provided with a water outlet pipe and a water inlet pipe. The inlet and outlet pipes are used to connect the water tank with an external water source to ensure the water quality and circulation inside the platform. According to the on-site situation, the pipeline layout is designed, and an anti-rust agent is added to ensure the smooth flow and stability of the water. Through valves and flow control devices, the regulation of water flow and water quality is achieved.

[0037] Operating steps:

[0038] a. Use a bridge crane in the blanking workshop to place the 10*2000*10000 steel plate on the grid platform.

[0039] b. Use a hydraulic jacking device to slowly lift the water tank and adjust the water level to be about 15mm higher than the cutting steel plate.

[0040] c. Check the cutting head and related components to ensure they are in good condition without damage.

[0041] d. The operator starts the plasma cutting machine, performs cutting operations according to the set parameters, controls the movement of the cutting head, and maintains an appropriate cutting distance and angle.

[0042] e. After completing the cutting task, turn off the plasma cutting machine and move the cutting head to a safe position.

[0043] f. Use a hydraulic jacking device to lower the water tank below the cut piece, and the construction workers perform tasks such as marking parts and picking up materials.

[0044] Cleaning and maintenance: Regularly clean the waste materials in the operation area under the water tank, and perform necessary maintenance and repair work on the equipment.

[0045] Safety precautions:

[0046] a. When working underwater, it is necessary to strictly abide by relevant safety regulations to ensure the personal safety of the operators.

[0047] b. Regularly check the integrity of the equipment and perform necessary maintenance and repair.

[0048] c. Use labor protection tools, waterproof gloves, anti-slip shoes, safety helmets, etc. that meet the standards.

[0049] d. During the cutting process, ensure the normal operation of the water supply and drainage systems and keep them clean.

[0050] e. It is strictly prohibited to walk on the sheet metal during the process of cutting parts to avoid accidental injuries.

Claims

1. A plasma underwater cutting platform jig, characterized in that, It includes a water tank (1), a suspension frame (3) and a grille platform (6). The water tank is fixed to the ground by a plurality of hydraulic lifting devices (2). An outlet pipe (7) and an inlet pipe (8) are provided on the water tank body. The hydraulic lifting device is composed of a hydraulic cylinder and a hydraulic rod. The hydraulic rod telescopically moves up and down relative to the hydraulic cylinder. The hydraulic rod is fixedly connected to the lower surface of the water tank, and the hydraulic cylinder is fixedly connected to the ground; A plurality of gusset plates (4) are arranged at equal intervals on the edge of the suspension frame. The bottom of the gusset plate is provided with a fixing plate. The fixing plate is fixed to the top end of the foundation (5) by bolts. The foundation is columnar. The bottom of the foundation is fixed to the ground, and a connecting piece protrudes from the top and is fixedly connected to the edge of the suspension frame. The suspension frame is suspended. The water tank is located below the suspension frame. The size of the water tank is larger than that of the suspension frame, and the suspension frame can be completely buried in the water tank; The suspension frame is a grid-type frame. The grille platform is placed in the suspension frame. The grid formed by the grille platform is smaller than the grid formed by the suspension frame. The steel plate to be cut is placed on the grille platform.

2. The plasma underwater cutting platform jig according to claim 1, wherein, The water tank, the suspension frame and the grille platform are all rectangular. A plurality of water tanks, suspension frames and grille platforms are freely combined into an underwater cutting platform jig of any size or shape.

3. A plasma underwater cutting platform jig according to claim 1, characterized in that, The foundation is a concrete column. A plurality of foundations are arranged at equal intervals along the circumference of the suspension frame.

4. The plasma underwater cutting platform jig according to claim 1, characterized in that A plurality of hydraulic lifting devices are arranged at equal intervals inside the foundation.

5. A plasma underwater cutting platform jig according to claim 1, characterized in that, Ball valves for adjusting the water level are installed on the outlet pipe and the inlet pipe.

6. The plasma underwater cutting platform jig according to claim 1, wherein The outlet pipe and the inlet pipe are connected to an external water source through a water pump.

7. A plasma underwater cutting platform jig according to claim 1, characterized in that, The grid spacing of the grille platform is 100 mm.

8. A plasma underwater cutting platform jig according to claim 1, characterized in that, The base of the gusset plate is fixed to the foundation by bolts.

9. A plasma underwater cutting platform jig according to claim 1, characterized in that, Reinforcing ribs are welded inside the water tank.

10. The plasma underwater cutting platform jig according to claim 2, characterized in that, When a plurality of water tanks are spliced, the gap between adjacent water tanks is 30 mm.

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