Shielding cover of plasma cutting equipment

Abstract

The utility model relates to the technical field of plasma cutting equipment, in particular to a shielding cover of plasma cutting equipment, which comprises a horn-shaped cover body, a connecting pipe is arranged at the top of the cover body, the connecting pipe and the cover body are of an integrated structure, a supporting pipe is sleeved on the connecting pipe in a threaded mode, and a first circular ring is arranged at the top end of the supporting pipe. The first circular ring is installed on the supporting pipe, the second circular ring is arranged above the first circular ring, the spring is arranged between the second circular ring and the first circular ring, the two sides of the spring are installed on the first circular ring and the second circular ring respectively, the cushion cover made of elastic materials is arranged at the top end of the second circular ring, and the cushion cover is installed on the second circular ring. And a hoop is movably sleeved on the cushion cover. The shielding cover of the plasma cutting equipment is convenient to assemble and disassemble the cover body and adjust the position of the cover body, and is used for overcoming the defects in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma cutting equipment, and particularly relates to a shielding cover for a plasma cutting device. Background Technique

[0002] In the process of industrial manufacturing, the thermal cutting methods used include gas cutting, plasma cutting, and laser cutting. Among them, the working principle of plasma cutting is to pass a mixed gas through a high-frequency arc, causing some gases to decompose or ionize into basic atomic particles, thereby generating plasma. Then, high-pressure gas is used to blow the plasma towards the workpiece. Since the temperature of the plasma arc column can reach 10,000°C to 30,000°C, far exceeding the melting point of metal or non-metal materials, when the plasma falls on the cutting part of the workpiece, the cutting part of the workpiece is quickly melted to form a cut. Because plasma cutting does not rely on oxidation reaction but on melting to cut materials, the applicable range of plasma cutting is much larger than that of oxygen cutting, and it can cut almost all metals, non-metals, multi-layers, and composite materials. Moreover, plasma cutting has the characteristics of narrow cut, good cut surface quality, and fast cutting speed. Therefore, when using plasma to cut thin plates, the plates will not deform. Especially in the field of cutting stainless steel, titanium alloy, and non-ferrous metal materials, better cutting quality can be achieved. Therefore, plasma cutting is widely used in fields such as automobiles, pressure vessels, chemical machinery, nuclear industry, general machinery, engineering machinery, and steel structures.

[0003] Since the plasma cutting process uses an extremely high-temperature plasma arc column to melt the cutting area of the workpiece, during the process of using a plasma cutting device to cut the workpiece, a large amount of soot, metal vapor, etc. will be generated at the cutting area of the workpiece. After the plasma is blown towards the workpiece by high-pressure gas, these metal vapors and soot will be carried away by the high-pressure gas, thus polluting the environment and posing a potential hazard to the health of the operators. To solve this technical problem, smoke exhaust and slag removal equipment is used to treat the metal vapors and soot carried away by the high-pressure gas. First, a shielding cover is installed on the cutting torch of the plasma cutting device, and then the bottom end of the shielding cover is adjusted to contact the top surface of the workpiece, so that the cutting area of the workpiece can be placed within the shielding space formed by the shielding cover. Then, a pipeline is used to connect the smoke exhaust and slag removal equipment and the shielding cover, so that the blown high-pressure gas is transported to the smoke exhaust and slag removal equipment through the pipeline. However, since the thicknesses of the workpieces to be cut are different, the distances between the workpieces and the bottom end of the cutting torch of the plasma cutting device cannot be unified. To prevent the shielding cover from damaging the workpiece, before cutting the workpiece, it is necessary to adjust the installation position of the shielding cover on the cutting torch of the plasma cutting device, which undoubtedly increases the adjustment amount of the cutting operation. In addition, if the shielding cover is used for a long time, a large amount of welding slag will accumulate on the inner wall of the shielding cover. To avoid interference of the shielding cover with the welding process, it is necessary to regularly remove the shielding cover and process the inner wall of the shielding cover. However, if the shielding cover is clamped and fixed on the plasma cutting device by screws, the loading and unloading operations of the shielding cover need to rely on tools such as screwdrivers. Obviously, the loading and unloading method of the shielding cover is rather troublesome. Therefore, some improvements need to be made in terms of the loading and unloading and adjustment of the shielding cover, so as to simplify the cutting operation burden and the loading and unloading operation burden. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides a shielding cover for a plasma cutting device that is convenient for loading and unloading the cover body and facilitating the adjustment of the position of the cover body, so as to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is as follows: A shielding cover for a plasma cutting device includes a horn-shaped cover body. A connecting pipe is provided at the top of the cover body. The connecting pipe and the cover body are of an integral structure. A support pipe is threadedly sleeved on the connecting pipe. A first ring is provided at the top end of the support pipe. The first ring is installed on the support pipe. A second ring is provided above the first ring. A spring is provided between the second ring and the first ring. Both sides of the spring are respectively installed on the first ring and the second ring. A gasket made of an elastic material is provided at the top end of the second ring. The gasket is installed on the second ring. A hoop is movably sleeved on the gasket.

[0006] Preferably, a plurality of air outlet holes are formed in the top of the cover body, and the plurality of air outlet holes are uniformly arranged in a star shape on the cover body. A gas collecting cover with an open bottom is movably sleeved on the top of the cover body. The inner cavity diameter of the bottom end of the gas collecting cover is not greater than the outer wall diameter of the middle part of the cover body. The inner cavity of the gas collecting cover is communicated with the inner cavity of the cover body through the air outlet holes. A sleeve hole is formed in the top of the gas collecting cover, and the sleeve hole is movably sleeved on the connecting pipe. A fixed pipe is arranged on one side of the gas collecting cover, and the inner cavity of the fixed pipe is communicated with the inner cavity of the gas collecting cover.

[0007] Preferably, a first sealing ring is arranged at the bottom end of the gas collecting cover, and the bottom of the first sealing ring is in contact with the outer wall of the cover body. A second sealing ring is arranged at the top of the sleeve hole, and the top of the second sealing ring is in contact with the bottom end of the support pipe. The gas collecting cover is clamped between the cover body and the support pipe through the first sealing ring and the second sealing ring.

[0008] Preferably, a plurality of through holes are formed in both the first ring on the outside of the spring and the second ring on the outside of the spring. The plurality of through holes are uniformly arranged in a star shape on the first ring or the second ring. Long bolt screws are respectively sleeved in the plurality of through holes. A first nut is threadedly sleeved on the long bolt screw. The hole diameter of the first nut and the hole diameter of the through hole are both in line with the diameter of the long bolt screw. The nut of the long bolt screw is in contact with the bottom surface of the first ring, and the first nut is in contact with the top surface of the second ring.

[0009] Preferably, a distance sensor is arranged on the top surface of the first ring, and the distance measuring end of the distance sensor faces the second ring.

[0010] Preferably, a third sealing ring is arranged at the bottom end of the cover body, and the third sealing ring is installed on the cover body.

[0011] Preferably, two auxiliary ears are arranged on the outer wall of the cover body, and the two auxiliary ears are symmetrically installed on both sides of the cover body.

[0012] The beneficial effects of the present utility model are as follows: First, by sleeving the cushion sleeve on the cutting torch of the plasma cutting device and clamping the cushion sleeve to the cutting torch of the plasma cutting device by using the hoop, the second ring, the spring, the first ring and the support pipe are all installed on the cutting torch of the plasma cutting device. Then, by screwing the connecting pipe onto the support pipe, the cover body can be quickly assembled to the support pipe, so as to facilitate the quick completion of the installation operation of the cover body. Similarly, when disassembling the cover body, by reversely screwing the connecting pipe, the disassembly operation of the cover body can be quickly completed, thus realizing the simplification of the loading and unloading operation of the cover body. And through the arranged spring, the distance between the second ring and the first ring can be adjusted, so as to press the cover body on the top surface of the workpiece, thereby placing the cutting area of the workpiece in the shielding space formed by the shielding cover, so as to reduce the adjustment burden of the cover body.

[0013] Secondly, in the present utility model, a plurality of air outlet holes are provided at the top of the cover body, so that the high-pressure gas inside the cover body can be discharged from the air outlet holes. Since the inner cavity diameter of the bottom end of the air collecting cover is not greater than the outer wall diameter of the middle part of the cover body, the air collecting cover is movably buckled on the cover body to facilitate the rotation of the orientation of the fixed pipe, so that the fixed pipe can be sleeved with pipes in multiple directions. The fixed pipe is connected to the smoke exhaust and slag removal equipment through the pipe, so that the high-pressure gas in the air collecting cover is transported into the smoke exhaust and slag removal equipment through the pipe, facilitating the treatment of the high-pressure gas. Moreover, in the present utility model, through the provided first sealing ring and second sealing ring, the top end and the bottom end of the air collecting cover are sealed, thereby preventing air leakage at the top end and the bottom end of the air collecting cover, facilitating the air collecting cover to transport high-pressure gas.

[0014] Thirdly, in the present utility model, through the provided long bolt and first nut, the distance between the first ring and the second ring can be adjusted to adjust the position of the cover body according to the needs of the cutting process. By means of the provided distance sensor, the distance from the distance sensor to the second ring is measured. After the cover body presses on the top surface of the workpiece, the distance sensor can measure that the distance from the distance sensor to the second ring becomes closer, so as to obtain the information that the cover body presses on the top surface of the workpiece, and it can prevent the cutting torch of the plasma cutting equipment from colliding with the workpiece. That is, when the distance sensor measures that the distance from the distance sensor to the second ring is too close, the movement of the cutting torch of the plasma cutting equipment towards the workpiece is controlled to stop.

[0015] In addition, in the present utility model, through the provided third sealing ring, the gap between the cover body and the top surface of the workpiece is sealed to improve the shielding effect on the surface of the workpiece and reduce the leakage of dust and metal vapor inside the cover body. Through the provided auxiliary ear, it is convenient to twist the cover body, thereby driving the connecting pipe to rotate and assisting in completing the loading and unloading operation of the cover body. Description of the Drawings

[0016] Figure 1 It is the first three-dimensional schematic diagram of the present utility model.

[0017] Figure 2 It is the second three-dimensional schematic diagram of the present utility model.

[0018] Figure 3 It is the sectional three-dimensional view of the present utility model.

[0019] Figure 4 It is Figure 3 The enlarged schematic diagram at A in

[0020] Figure 5 It is the explosion schematic diagram of the present utility model.

[0021] Figure 6 It is the assembly schematic diagram of the present utility model and the cutting torch of the plasma cutting equipment. Detailed Embodiment

[0022] As shown Figures 1 to 6 in the figure, a shielding cover of a plasma cutting device includes a horn-shaped cover body 1. A connecting pipe 2 is provided at the top of the cover body 1. The connecting pipe 2 and the cover body 1 are of an integral structure. A support pipe 3 is threadedly sleeved on the connecting pipe 2. The outer diameter of the connecting pipe 2 is matched with the inner diameter of the support pipe 3. A first ring 4 is provided at the top end of the support pipe 3. The first ring 4 is installed on the support pipe 3. A second ring 5 is provided above the first ring 4. A spring 6 is provided between the second ring 5 and the first ring 4. Both sides of the spring 6 are respectively installed on the first ring 4 and the second ring 5. A gasket 7 made of an elastic material is provided at the top end of the second ring 5. The gasket 7 is installed on the second ring 5. A hoop 8 is movably sleeved on the gasket 7. By using the elasticity of the spring 6, the cover body 1 can be pressed against the top surface of the workpiece to reduce the adjustment burden of the cover body 1. The gasket 7, the second ring 5, the spring 6, the first ring 4 and the support pipe 3 are sequentially sleeved on the cutting torch of the plasma cutting device, and the hoop 8 is sleeved on the gasket 7. By installing screws and nuts on the hoop 8, the hoop 8 can be used to press and install the gasket 7 onto the cutting torch of the plasma cutting device. Then, the connecting pipe 2 and the cover body 1 are sleeved on the cutting torch of the plasma cutting device, and then the connecting pipe 2 is screwed onto the support pipe 3, so that the cover body 1 can be quickly assembled to the support pipe 3, facilitating the quick completion of the installation operation of the cover body 1; similarly, when disassembling the cover body 1, by reversely screwing the connecting pipe 2, the disassembly operation of the cover body 1 can be quickly completed, realizing the simplification of the loading and unloading operation of the cover body 1.

[0023] In this embodiment, a plurality of air outlet holes 9 are opened at the top of the cover body 1. The plurality of air outlet holes 9 are evenly arranged in a star shape on the cover body 1, facilitating the discharge of the high-pressure gas in the cover body 1 from the air outlet holes 9. A gas collecting cover 10 with an open bottom is movably sleeved on the top of the cover body 1. The inner diameter of the bottom end cavity of the gas collecting cover 10 is not greater than the outer diameter of the middle part of the cover body 1. The inner cavity of the gas collecting cover 10 is communicated with the inner cavity of the cover body 1 through the air outlet holes 9. A sleeve hole 11 is opened at the top of the gas collecting cover 10. The sleeve hole 11 is movably sleeved on the connecting pipe 2. A fixed pipe 12 is provided on one side of the gas collecting cover 10. The inner cavity of the fixed pipe 12 is communicated with the inner cavity of the gas collecting cover 10, enabling the gas collecting cover 10 to be movably buckled on the cover body 1 to conveniently rotate the orientation of the fixed pipe 12 so that the fixed pipe 12 can be sleeved with pipes in multiple directions. The fixed pipe 12 is connected to the smoke exhaust and slag removal equipment through a pipe, so that the high-pressure gas in the gas collecting cover 10 is transported to the smoke exhaust and slag removal equipment through the pipe, facilitating the treatment of the high-pressure gas.

[0024] Specifically, a first sealing ring 13 is provided at the bottom end of the gas collecting cover 10. The bottom of the first sealing ring 13 is in contact with the outer wall of the cover body 1. A second sealing ring 14 is provided at the top of the sleeve hole 11. The top of the second sealing ring 14 is in contact with the bottom end of the support pipe 3. The gas collecting cover 10 is clamped between the cover body 1 and the support pipe 3 through the first sealing ring 13 and the second sealing ring 14. Thus, the top end and the bottom end of the gas collecting cover 10 are sealed, further preventing air leakage from occurring in the gas collecting cover 10, so as to facilitate the gas collecting cover 10 to transport high-pressure gas.

[0025] Please refer to again Figures 1-2 , a plurality of through holes 15 are provided in both the first ring 4 outside the spring 6 and the second ring 5 outside the spring. The plurality of through holes 15 are evenly arranged in a star shape on the first ring 4 or the second ring 5. A long rod bolt 16 is respectively sleeved in the plurality of through holes 15. A first nut 17 is threadedly sleeved on the long rod bolt 16. The aperture of the first nut 17 and the aperture of the through hole 15 are both in line with the diameter of the long rod bolt 16. The nut of the long rod bolt 16 is in contact with the bottom surface of the first ring 4, and the first nut 17 is in contact with the top surface of the second ring 5. By turning the first nut 17, the position of the first nut 17 on the long rod bolt 16 is adjusted. Under the elastic force of the spring 6, the distance between the first ring 4 and the second ring 5 is adjusted, thereby facilitating the adjustment of the position of the cover body 1.

[0026] In this embodiment, a distance sensor 18 is provided on the top surface of the first ring 4. The distance measuring end of the distance sensor 18 faces the second ring 5. The distance sensor 18 is used to measure the distance from the distance sensor 18 to the second ring 5, thereby preventing the distance from the distance sensor 18 to the second ring 5 from being too close, and further preventing the cutting torch of the plasma cutting device from colliding with the workpiece. That is, after the cover body 1 contacts the workpiece, the spring 6 is compressed, and the cover body 1, the first ring 4 and the distance sensor 18 no longer move. If the cutting torch of the plasma cutting device continues to approach the workpiece, the second ring 5 moves with the cutting torch of the plasma cutting device continuing to approach the workpiece, so that the distance between the second ring 5 and the distance sensor 18 becomes shorter. The information that the distance between the second ring 5 and the distance sensor 18 becomes shorter is transmitted through the distance sensor 18, so as to timely stop the movement of the cutting torch of the plasma cutting device, achieving the avoidance of the cutting torch of the plasma cutting device colliding with the workpiece.

[0027] It should be noted that a third sealing ring 19 is provided at the bottom end of the cover body 1. The third sealing ring 19 is installed on the cover body 1 to facilitate the sealing of the gap between the cover body 1 and the top surface of the workpiece, so as to improve the shielding effect on the workpiece surface and reduce the leakage of dust and metal vapor in the cover body 1.

[0028] Specifically, two auxiliary ears 20 are provided on the outer wall of the cover body 1. The two auxiliary ears 20 are symmetrically installed on both sides of the cover body 1. By squeezing the two auxiliary ears 20, the rotation of the cover body 1 is controlled, thereby driving the connecting pipe 2 to rotate, and further assisting in completing the loading and unloading operation of the cover body 1.

[0029] The method of assembling this product to the cutting torch of the plasma cutting equipment is as follows: As Figures 1 to 6 shown, first, the cushion sleeve 7, the second ring 5, the spring 6, the first ring 4, and the support pipe 3 are sequentially sleeved on the cutting torch of the plasma cutting equipment, and the position of the cushion sleeve 7 on the cutting torch of the plasma cutting equipment is adjusted so that when the cover body 1 and the connecting pipe 2 are installed on the support pipe 3, the bottom end of the cover body 1 is located below the cutting torch of the plasma cutting equipment to facilitate the cover body 1 to cover the workpiece. Then, the retaining hoop 8 is sleeved on the cushion sleeve 7, and by installing screws and nuts on the retaining hoop 8, the retaining hoop 8 is used to press and install the cushion sleeve 7 on the cutting torch of the plasma cutting equipment, and then the second ring 5, the spring 6, the first ring 4, and the support pipe 3 are all installed on the cutting torch of the plasma cutting equipment. Then, the first sealing ring 13, the gas collecting cover 10, and the second sealing ring 14 are sequentially sleeved on the cover body 1, and the connecting pipe 2 and the cover body 1 are sleeved on the cutting torch of the plasma cutting equipment. Then, the connecting pipe 2 is screwed onto the support pipe 3 so that the first sealing ring 13, the gas collecting cover 10, and the second sealing ring 14 are clamped between the support pipe 3 and the cover body 1, thereby quickly assembling the cover body 1 to the support pipe 3. Finally, by rotating the fixed pipe 12, the orientation of the fixed pipe 12 is adjusted to facilitate the installation of one side of the pipeline onto the fixed pipe 12. The pipeline is used to connect the fixed pipe 12 with the smoke exhaust and slag removal equipment, so that the high-pressure gas in the gas collecting cover 10 is transported to the smoke exhaust and slag removal equipment through the pipeline to complete the assembly of this product.

[0030] Through Example 1, by sleeving the cushion sleeve 7 on the cutting torch of the plasma cutting equipment and clamping and installing the cushion sleeve 7 on the cutting torch of the plasma cutting equipment by using the retaining hoop 8, the second ring 5, the spring 6, the first ring 4, and the support pipe 3 are all installed on the cutting torch of the plasma cutting equipment. Then, the connecting pipe 2 is screwed onto the support pipe 3, so that the cover body 1 can be quickly assembled to the support pipe 3 to facilitate the quick completion of the installation operation of the cover body 1. Similarly, when disassembling the cover body 1, by screwing the connecting pipe 2 in the reverse direction, the disassembly operation of the cover body 1 can be quickly completed, thereby realizing the simplification of the loading and unloading operation of the cover body 1. And through the arranged spring 6, the distance between the second ring 5 and the first ring 4 can be adjusted to facilitate pressing the cover body 1 on the top surface of the workpiece, so that the cutting area of the workpiece is placed in the shielding space formed by the shielding cover, thereby reducing the adjustment burden of the cover body 1.

[0031] The above-described embodiments are only the preferred embodiments of the present utility model, and do not limit the scope of implementation of the present utility model. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present utility model patent shall be included within the scope of the patent application of the present utility model.

Claims

1. A shielding cover for plasma cutting equipment, comprising a trumpet-shaped cover body (1), characterized in that: A connecting pipe (2) is arranged on the top of the cover body (1), the connecting pipe (2) and the cover body (1) are an integral structure, a supporting pipe (3) is threadedly sleeved on the connecting pipe (2), a first circular ring (4) is arranged on the top of the supporting pipe (3), the first circular ring (4) is mounted on the supporting pipe (3), a second circular ring (5) is arranged above the first circular ring (4), a spring (6) is arranged between the second circular ring (5) and the first circular ring (4), two sides of the spring (6) are respectively mounted on the first circular ring (4) and the second circular ring (5), a cushion sleeve (7) made of elastic material is arranged on the top of the second circular ring (5), the cushion sleeve (7) is mounted on the second circular ring (5), and a clamp (8) is movably sleeved on the cushion sleeve (7).

2. The shielding cover of the plasma cutting equipment according to claim 1, characterized in that: The cover body (1) is provided with a plurality of air outlet holes (9) on the top thereof, and the plurality of air outlet holes (9) are evenly arranged on the cover body (1) in a star shape. The top of the cover body (1) is movably sleeved with an air collecting cover (10) with a bottom opening, and the inner cavity diameter of the bottom end of the air collecting cover (10) is not larger than the diameter of the middle outer wall of the cover body (1). The inner cavity of the air collecting cover (10) is connected to the inner cavity of the cover body (1) through the air outlet holes (9). The top of the air collecting cover (10) is provided with a sleeve hole (11), and the sleeve hole (11) is movably sleeved on the connecting pipe (2). A fixing pipe (12) is provided on one side of the air collecting cover (10), and the inner cavity of the fixing pipe (12) is connected to the inner cavity of the air collecting cover (10).

3. The shielding cover of the plasma cutting equipment according to claim 2, characterized in that: A first sealing ring (13) is provided at the bottom end of the gas collecting cover (10), and the bottom of the first sealing ring (13) contacts the outer wall of the cover body (1). A second sealing ring (14) is provided at the top of the sleeve hole (11), and the top of the second sealing ring (14) contacts the bottom end of the support tube (3). The gas collecting cover (10) is clamped between the cover body (1) and the support tube (3) by the first sealing ring (13) and the second sealing ring (14).

4. The shielding cover of the plasma cutting equipment according to claim 1, characterized in that: The first circular ring (4) outside the spring (6) and the second circular ring (5) outside the spring are both provided with a plurality of through holes (15), and the plurality of through holes (15) are evenly arranged in a star shape on the first circular ring (4) or the second circular ring (5), and a long rod bolt (16) is respectively installed in the plurality of through holes (15), and a first nut (17) is threadedly installed on the long rod bolt (16), and the hole diameter of the first nut (17) and the hole diameter of the through hole (15) are consistent with the diameter of the long rod bolt (16), and the nut of the long rod bolt (16) contacts the bottom surface of the first circular ring (4), and the first nut (17) contacts the top surface of the second circular ring (5).

5. The shielding cover of the plasma cutting equipment according to claim 1, characterized in that: A distance sensor (18) is arranged on the top surface of the first circular ring (4), and the distance measuring end of the distance sensor (18) faces the second circular ring (5).

6. The shielding cover of the plasma cutting equipment according to claim 1, characterized in that: A third sealing ring (19) is provided at the bottom end of the cover body (1), and the third sealing ring (19) is mounted on the cover body (1).

7. The shielding cover of the plasma cutting equipment according to claim 1, characterized in that: Two auxiliary ears (20) are arranged on the outer wall of the cover body (1), and the two auxiliary ears (20) are symmetrically mounted on two sides of the cover body (1).

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