Low-vacuum-pumping device for argon welding

Abstract

The utility model discloses a low vacuum pumping device for argon welding, which comprises a box body, a box cover connected to the box body and a window assembly assembled on the box cover, two connecting ports are arranged on the side surface of the box body, and the box body comprises a one-way valve and a gas interface; the interior of the box body is pumped to be in a low vacuum state through the gas connector, nitrogen is injected, the one-way valve controls the pressure of the injected nitrogen, so that a welding gun penetrates through the window assembly to weld a sample piece in the box body, the device is pumped to be in a low vacuum state and then is filled with nitrogen, and the welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the application field of argon welding technology, in particular to a low vacuum device for argon welding. Background Art

[0002] When argon arc welding is performed on a product in a conventional semi-sealed device, nitrogen filling is required for 15-20 minutes. However, residual oxygen can still cause slight oxidation during welding, affecting welding efficiency and product appearance. Therefore, a low-vacuum device for argon welding has been proposed to address the problem of surface oxidation. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a low vacuum device for argon welding, which is evacuated to a low vacuum and then filled with nitrogen, thereby improving the welding efficiency.

[0004] The technical solution of the utility model is: a low vacuum device for argon welding, comprising a box body, a box cover connected to the box body, and a window assembly assembled on the box cover, wherein the side of the box body is provided with two connecting ports including a one-way valve and a gas interface;

[0005] The box body is evacuated to a low vacuum state through the gas interface and nitrogen is injected. The one-way valve controls the pressure of the injected nitrogen so that the welding gun passes through the window assembly to weld the sample in the box body.

[0006] Furthermore, the box cover is provided with an opening, and the window assembly is inserted into the opening and fixed by bolts.

[0007] Furthermore, the window assembly includes an upper ring block, a light-transmitting plate fixed to the upper ring block, and a lower ring block, wherein the inner diameter of the light-transmitting plate is smaller than the outer diameter of the opening;

[0008] The upper ring block and the lower ring block cooperate with each other to assemble the light-transmitting plate on the box cover.

[0009] Furthermore, the upper ring block and the lower ring block have the same structure, and the outer diameter of the upper ring block is larger than the outer diameter of the opening.

[0010] Furthermore, a joint is provided in the middle of the light-transmitting plate, and a sealing bolt is threadedly connected to the center of the joint.

[0011] Furthermore, a layer of rubber mold with holes is provided at the joint, and the rubber mold is located below the sealing bolt.

[0012] Furthermore, a protrusion is provided on the edge of the box cover, and the box body is provided with a groove used to cooperate with the protrusion. The box cover rotates relative to the box body and is fixed by the protrusion and the groove.

[0013] Furthermore, the edge thickness of the bump is set to be gradually changed.

[0014] Furthermore, a fluororubber ring is provided between the box body and the box cover.

[0015] Furthermore, a three-way pipe fitting is provided at the gas interface.

[0016] The beneficial technical effects of the utility model are:

[0017] 1. The device is evacuated to a low vacuum and then filled with nitrogen to improve welding efficiency.

[0018] 2. The setting of fluororubber ring ensures the sealing between the box cover and the box body.

[0019] 3. The rubber mold is used to prevent the welding gun from carrying air when it is placed in the box.

[0020] 4. The setting of the light-transmitting plate makes it convenient for personnel to observe the welding conditions of the samples inside the box.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the connection between the box cover and the window assembly of the present invention;

[0024] Figure 3 This is a structural diagram of the window assembly of the present invention;

[0025] Figure 4 This is a structural diagram of the box cover of the present utility model;

[0026] Figure 5 It is a structural schematic diagram of the box body of the present utility model.

[0027] The accompanying drawings are:

[0028] 100, box body; 110, one-way valve; 120, gas interface; 130, groove; 140, fluororubber ring; 200, box cover; 210, bump; 220, opening; 300, window assembly; 310, upper ring block; 320, light-transmitting plate; 330, lower ring block; 400, sealing bolt; 410, joint. DETAILED DESCRIPTION

[0029] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0031] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the descriptions in the embodiments and shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present utility model.

[0032] like Figure 1-Figure 5 As shown, the present invention specifically relates to a low vacuum device for argon welding, comprising a box body 100, a box cover 200 connected to the box body 100, and a window assembly 300 assembled on the box cover 200. The side of the box body 100 is provided with two connecting ports including a one-way valve 110 and a gas interface 120.

[0033] The box body 100 is evacuated to a low vacuum state through the gas interface 120 and nitrogen is injected. The one-way valve 110 controls the pressure of the injected nitrogen so that the welding gun passes through the window assembly 300 to weld the sample in the box body 100.

[0034] It should be noted that the window assembly 300 is assembled on the box cover 200. Under normal use, the window assembly 300 will not be removed relative to the box cover 200. In addition, the box cover 200 is assembled on the box body 100, and personnel can observe the welding status of the samples in the box body 100 through the window assembly 300.

[0035] The sample is first placed in the box 100, and the box 100 is evacuated to a low vacuum state through the gas interface 120. When the box 100 is in a low vacuum state, nitrogen is injected into the box 100 again through the gas interface 120. At the same time, the required nitrogen pressure is controlled by the one-way valve 110.

[0036] When the nitrogen pressure reaches the required standard, the welding gun passes through the window assembly 300 and enters the interior of the box 100 to weld the sample, and the personnel observe the welding status of the sample through the window assembly 300.

[0037] The box cover 200 is provided with an opening 220 , and the window assembly 300 is inserted into the opening 220 and fixed by bolts, so that the window assembly 300 and the box cover 200 can be conveniently and quickly assembled and disassembled.

[0038] The window assembly 300 includes an upper ring block 310, a light-transmitting plate 320 fixed to the upper ring block 310, and a lower ring block 330. The inner diameter of the light-transmitting plate 320 is smaller than the outer diameter of the opening 220.

[0039] The upper ring block 310 and the lower ring block 330 cooperate with each other to assemble the light-transmitting plate 320 to the box cover 200 .

[0040] Among them, the upper ring block 310 is fixedly connected to the light-transmitting plate 320. The upper ring block 310 is inserted into the opening 220 through the light-transmitting plate 320 and abuts against the upper end surface of the box cover 200. The lower ring block 330 is fixed to the upper ring block 310 from the bottom of the box cover 200 by bolts, thereby fixing the window assembly 300 to the box cover 200.

[0041] In addition, the thickness of the light-transmitting plate 320 is equal to the thickness of the box cover 200 , and the light-transmitting plate 320 is fixed on the box cover 200 through the upper ring block 310 and the lower ring block 330 .

[0042] The upper ring block 310 and the lower ring block 330 have the same structure, and the outer diameter of the upper ring block 310 is larger than the outer diameter of the opening 220 .

[0043] A joint 410 is provided at the middle position of the light-transmitting plate 320 , and a sealing bolt 400 is threadedly connected to the center position of the joint 410 .

[0044] When low vacuum is drawn inside the box 100 and nitrogen is injected, the sealing bolt 400 is connected to the joint 410 to ensure that the inside of the box 100 is in a low vacuum state and no leakage occurs; when the sample needs to be welded, the sealing bolt 400 is removed and the welding gun enters the inside of the box 100 from the connection of the sealing bolt 400 to weld the sample.

[0045] A layer of rubber mold with holes is provided at the joint 410 , and the rubber mold is located below the sealing bolt 400 .

[0046] The rubber mold is provided to prevent the welding gun from carrying air when it is placed in the box body 100 and to prevent a large amount of leakage when the sealing bolt 400 is disassembled.

[0047] In addition, the rubber mold is a consumable part and will be replaced accordingly after being used a certain number of times to ensure the quality of welding.

[0048] The edge of the box cover 200 is provided with a protrusion 210 , and the box body 100 is provided with a groove 130 used to cooperate with the protrusion 210 . The box cover 200 rotates relative to the box body 100 and is fixed by the protrusion 210 and the groove 130 .

[0049] The edge thickness of the protrusion 210 is gradually changed so as to lock the box cover 200 and the box body 100 .

[0050] A fluororubber ring 140 is provided between the box body 100 and the box cover 200 to improve the sealing between the box cover 200 and the box body 100 and prevent leakage.

[0051] The gas interface 120 is provided with a three-way pipe fitting, which can meet the needs of vacuuming and injecting nitrogen.

[0052] The above embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A low vacuum device for argon welding, characterized in that: The invention comprises a box body (100), a box cover (200) connected to the box body (100), and a window assembly (300) assembled on the box cover (200); the side of the box body (100) is provided with two connection ports including a one-way valve (110) and a gas interface (120); The box (100) is evacuated to a low vacuum state through the gas interface (120) and nitrogen is injected. The one-way valve (110) controls the pressure of the injected nitrogen so that the welding gun passes through the window assembly (300) to weld the sample in the box (100).

2. The low vacuum device for argon welding according to claim 1, characterized in that: The box cover (200) is provided with an opening (220), and the window assembly (300) is inserted into the opening (220) and fixed by bolts.

3. The low vacuum device for argon welding according to claim 2, characterized in that: The window assembly (300) comprises an upper ring block (310), a light-transmitting plate (320) fixed to the upper ring block (310), and a lower ring block (330), wherein the inner diameter of the light-transmitting plate (320) is smaller than the outer diameter of the opening (220); The upper ring block (310) and the lower ring block (330) cooperate with each other to assemble the light-transmitting plate (320) on the box cover (200).

4. The low vacuum device for argon welding according to claim 3, characterized in that: The upper ring block (310) and the lower ring block (330) have the same structure, and the outer diameter of the upper ring block (310) is greater than the outer diameter of the opening (220).

5. The low vacuum device for argon welding according to claim 4, characterized in that: A joint (410) is provided at the middle position of the light-transmitting plate (320), and a sealing bolt (400) is threadedly connected to the center position of the joint (410).

6. The low vacuum device for argon welding according to claim 5, characterized in that: A layer of rubber mold with holes is provided at the joint (410), and the rubber mold is located below the sealing bolt (400).

7. The low vacuum device for argon welding according to claim 1, characterized in that: A protrusion (210) is provided at the edge of the box cover (200), and the box body (100) is provided with a groove (130) used in conjunction with the protrusion (210). The box cover (200) rotates relative to the box body (100) and is fixed by the protrusion (210) and the groove (130).

8. The low vacuum device for argon welding according to claim 7, characterized in that: The edge thickness of the protrusion (210) is set to be gradually changed.

9. The low vacuum device for argon welding according to claim 1, characterized in that: A fluororubber ring (140) is provided between the box body (100) and the box cover (200).

10. The low vacuum device for argon welding according to claim 1, characterized in that: A three-way pipe fitting is provided at the gas interface (120).

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