Welding clamp tool with gas flow channel
By designing a welding fixture with a gas flow channel, the problem of unstable welding of the three fixed corner pieces of the LNG ship's liquid cargo containment system was solved, achieving a high-efficiency, low-oxidation welding effect and improving production efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-31
AI Technical Summary
In the existing technology, the three-sided fixed corner pieces of the LNG ship's internal liquid cargo containment system lack specific welding fixtures, resulting in low production efficiency and poor welding quality.
A welding fixture with a gas flow channel was designed, including a base plate, a support plate, a clamping plate, adjusting bolts and locking hooks. An argon gas connection pipe is used to provide inert gas protection, which improves welding stability and efficiency.
It improves the welding stability and efficiency of three-sided fixed corner brackets, reduces welding oxidation, and enhances welding quality.
Smart Images
Figure CN224059057U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding technology for three-sided fixed corner pieces of LNG ship cargo containment systems, and more specifically, to a welding fixture with a gas flow channel. Background Technology
[0002] LNG carriers are internationally recognized as "three high" products: high technology, high difficulty, and high added value. LNG carriers are special vessels that transport liquefied gas at a low temperature of -162℃. They are a kind of "super refrigerated truck at sea" and are known as the "crown jewel" of the world's shipbuilding industry.
[0003] The containment system of the LNG carrier's liquid cargo tank is the core technology of the LNG carrier. The main function of the liquid cargo containment system is to store LNG cargo with a liquid temperature of -162℃.
[0004] The liquefied cargo containment system is the isolation barrier and thermal insulation system of the liquefied cargo tank. The cargo tank consists of primary and secondary thermal insulation layers and corresponding protective films. The insulation layers are composed of multiple insulating boxes, and the protective films are made of Invar material, also known as "invariant steel." The primary and secondary insulation layers provide effective thermal insulation to maintain the temperature of the cargo inside the tank during transportation. Ammonia gas is introduced during normal loading to ensure safety. Additionally, there is a liquid bend and a gas bend, used for loading and unloading LNG cargo and for the recovery and reuse of volatile gases, respectively.
[0005] The liquid cargo containment system has two main functions: 1. A completely dense metal film ensures no leakage of LNG; 2. Good thermal insulation capabilities prevent the hull from being cooled and losing strength and toughness.
[0006] Currently, when the insulation panels of the LNG cargo containment system are attached to the inner wall of the LNG cargo containment system, they are prone to falling off, resulting in unstable connections. Therefore, three-sided fixing corner brackets are used to connect and fix the insulation panels. However, there are currently no specific welding fixtures for the three-sided fixing corner brackets, which leads to technical problems such as low production efficiency and low welding quality.
[0007] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content
[0008] The purpose of this invention is to provide a welding fixture with a gas flow channel, which improves the stability and efficiency of welding three-sided fixed corner pieces, and increases the production efficiency of three-sided fixed corner pieces.
[0009] This utility model provides a welding fixture with a gas flow channel, including a base plate, a support plate, a clamping plate, adjusting bolts, and locking hooks; the support plate is vertically connected to the base plate, and the cross-section of the support plate is ︿-shaped, with two locking hooks hinged to the upper end of the support plate; threaded holes are provided at both the left and right sides of the base plate, the threaded holes are located in front of the support plate, and the adjusting bolts are connected to the threaded holes; one end of the clamping plate has a waist-shaped hole, and the other end of the clamping plate has a hook opening, the waist-shaped hole being fitted onto one of the adjusting bolts.
[0010] Using the above technical solution, in use, the bottom surface of the three-sided fixing corner piece is placed on the base plate, and the other two sides of the three-sided fixing corner piece are respectively attached to the front of the support plate; the rotating locking hook is engaged with the support plate and the other two sides of the three-sided fixing corner piece; the pressing plate is pressed on the bottom surface of the three-sided fixing corner piece, and the pressing plate is rotated so that its hook opening is hung on another adjusting bolt; the two adjusting bolts are rotated to press the bottom surface of the three-sided fixing corner piece between the base plate and the pressing plate.
[0011] Furthermore, the welding fixture with gas flow channel also includes an argon gas connecting pipe; an air flow groove is provided on the upper part of the base plate, the air flow groove is ︿-shaped, the air flow groove is parallel to the support plate; the argon gas connecting pipe is connected to the side of the base plate, and a gas flow channel is provided inside the base plate, one end of the gas flow channel is connected to the argon gas connecting pipe, and the other end of the gas flow channel is connected to one end of the air flow groove.
[0012] Using the above technical solution, the argon gas connection pipe is connected to an external argon gas supply device during use; when the bottom surface of the three-sided fixed corner piece is placed on the base plate, the welding point of the three-sided fixed corner piece is located above the gas flow channel; during welding, a continuous supply of argon gas will enter the gas flow channel through the gas flow channel from the argon gas connection pipe, and the argon gas flowing out through the gas flow channel will remove the oxygen at the welding point of the three-sided fixed corner piece; under the protection of inert gas, the oxidation at the welding point is reduced, and the welding quality is improved.
[0013] Furthermore, the welding fixture with gas flow channels also includes a backing plate connected to the underside of the clamping plate.
[0014] Furthermore, the welding fixture with gas flow channels also includes stops, with stops connected to both sides of the support plate.
[0015] Furthermore, the welding fixture with gas flow channels also includes a reinforcing plate, one side of which is connected to the base plate and the other side of which is connected to the support plate.
[0016] Furthermore, shims are fitted onto both of the adjusting bolts.
[0017] This utility model discloses a welding fixture with a gas flow channel. In use, the bottom surface of the three-sided fixed corner piece is placed on the base plate, and the other two sides of the three-sided fixed corner piece are respectively attached to the front of the support plate. A rotating locking hook engages with the support plate and the other two sides of the three-sided fixed corner piece. A clamping plate presses against the bottom surface of the three-sided fixed corner piece, and rotating the clamping plate causes its hook opening to hook onto another adjusting bolt. Rotating the two adjusting bolts presses the bottom surface of the three-sided fixed corner piece tightly between the base plate and the clamping plate. This fixture improves the stability and efficiency of welding three-sided fixed corner pieces, thereby increasing the production efficiency of three-sided fixed corner pieces. Attached Figure Description
[0018] Figure 1 A schematic diagram of the structure of a welding fixture with a gas flow channel provided in an embodiment of this utility model.
[0019] Figure 2 for Figure 1 A schematic diagram of the base plate of a welding fixture with gas flow channels.
[0020] Figure 3 for Figure 1 A schematic diagram of the clamping plate of a welding fixture with a gas flow channel.
[0021] Figure 4 for Figure 1 A schematic diagram of the locking hook of a welding fixture with a gas flow channel.
[0022] Figure 5 for Figure 1 A top view of the welding fixture with gas flow channels.
[0023] The reference numerals and components involved in the accompanying drawings are shown below:
[0024] 100, base plate 210, threaded hole 220, airflow channel
[0025] 200, support plate 300, clamping plate 310, oblong hole
[0026] 320, hook opening 400, adjusting bolt 410, washer
[0027] 500, locking hook 600, argon gas connecting pipe 700, pad
[0028] 800, stop block 900, reinforcing plate Detailed Implementation
[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0030] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0031] Example 1
[0032] Figure 1 This is a schematic diagram of the structure of a welding fixture with a gas flow channel provided in an embodiment of the present invention. Figure 2 for Figure 1 A schematic diagram of the structure of the base plate of a welding fixture with gas flow channels. Figure 3 for Figure 1 A schematic diagram of the clamping plate of a welding fixture with gas flow channels. Figure 4 for Figure 1 A schematic diagram of the locking hook structure of a welding fixture with a gas flow channel. Figure 5 for Figure 1 A top view schematic diagram of a welding fixture with gas flow channels. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The welding fixture with a gas flow channel provided in this embodiment includes a base plate 100, a support plate 200, a clamping plate 300, an adjusting bolt 400, and a locking hook 500. The support plate 200 is vertically connected to the base plate 100. The cross-section of the support plate 200 is U-shaped. Two locking hooks 500 are hinged to the upper end of the support plate 200. Threaded holes 210 are provided on both the left and right sides of the base plate 100. The threaded holes 210 are located in front of the support plate 200, and the adjusting bolts 400 are connected to the threaded holes 210. One end of the clamping plate 300 is provided with a waist-shaped hole 310, and the other end of the clamping plate 300 is provided with a hook opening 320. The waist-shaped hole 310 is fitted onto one of the adjusting bolts 400.
[0033] It should be noted that, in use, the bottom surface of the three-sided fixing corner bracket is placed on the base plate 100, and the other two sides of the three-sided fixing corner bracket are respectively attached to the front of the support plate 200; the rotating locking hook 500 is engaged with the support plate 200 and the other two sides of the three-sided fixing corner bracket; the pressing plate 300 is pressed on the bottom surface of the three-sided fixing corner bracket, and the pressing plate 300 is rotated so that its hook opening 320 is hung on another adjusting bolt 400; the two adjusting bolts 400 are rotated to press the bottom surface of the three-sided fixing corner bracket tightly between the base plate 100 and the pressing plate 300;
[0034] The fixture of this invention improves the stability and efficiency of welding three-sided fixed corner pieces, thereby increasing the production efficiency of three-sided fixed corner pieces.
[0035] Furthermore, the welding fixture tooling with gas flow channel of this utility model also includes an argon gas connecting pipe 600; an air flow groove 220 is provided on the upper part of the base plate 100, the air flow groove 220 is ︿-shaped, the air flow groove 220 is parallel to the support plate 200; the argon gas connecting pipe 600 is connected to the side of the base plate 100, and a gas flow channel (not shown in the figure) is provided inside the base plate 100, one end of the gas flow channel is connected to the argon gas connecting pipe 600, and the other end of the gas flow channel is connected to one end of the air flow groove 220.
[0036] It should be noted that during use, the argon gas connection pipe 600 is connected to an external argon gas supply device; when the bottom surface of the three-sided fixed corner piece is placed on the base plate 100, the welding point of the three-sided fixed corner piece is located above the airflow groove 220; during welding, a continuous supply of argon gas will enter the airflow groove 220 through the gas flow channel from the argon gas connection pipe 600, and the argon gas flowing out through the airflow groove 220 will remove the oxygen from the welding point of the three-sided fixed corner piece; under the protection of inert gas, the oxidation at the welding point is reduced, and the welding quality is improved.
[0037] Furthermore, the welding fixture with gas flow channels of this invention also includes a pad 700, which is connected to the underside of the clamping plate 300. The welding fixture with gas flow channels of this invention also includes stop blocks 800, which are connected to both sides of the support plate 200.
[0038] It should be noted that the design of the 800 stop further prevents the three fixed corner pieces from moving left and right.
[0039] Furthermore, the welding fixture tooling with gas flow channel of this utility model also includes a reinforcing plate 900, one side of which is connected to the base plate 100 and the other side of which is connected to the support plate 200; a gasket 410 is fitted on each of the two adjusting bolts 400.
[0040] As can be seen from the above description, the advantages of this utility model are:
[0041] 1. The welding fixture tooling with gas flow channels of this utility model, in use, has its bottom surface of the three-sided fixed corner piece placed on the base plate 100, and the other two sides of the three-sided fixed corner piece respectively attached to the front of the support plate 200; the rotating locking hook 500 is engaged with the support plate 200 and the other two sides of the three-sided fixed corner piece; the clamping plate 300 is pressed on the bottom surface of the three-sided fixed corner piece, and the clamping plate 300 is rotated so that its hook opening 320 is hung on another adjusting bolt 400; the two adjusting bolts 400 are rotated to press the bottom surface of the three-sided fixed corner piece between the base plate 100 and the clamping plate 300; this improves the stability and efficiency of welding the three-sided fixed corner piece, thereby improving the production efficiency of the three-sided fixed corner piece;
[0042] 2. The welding fixture with gas flow channels of this utility model is connected to an external argon gas supply device via an argon gas connecting pipe 600. When the bottom surface of the three-sided fixed corner piece is placed on the base plate 100, the welding point of the three-sided fixed corner piece is located above the gas flow channel 220. During welding, a continuous supply of argon gas enters the gas flow channel 220 through the argon gas connecting pipe 600. The argon gas flowing out of the gas flow channel 220 removes the oxygen from the welding point of the three-sided fixed corner piece. Under the protection of inert gas, oxidation at the welding point is reduced, and the welding quality is improved.
[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A welding fixture tool having a gas flow channel, characterized by, It comprises a bottom plate (100), a support plate (200), a pressing plate (300), an adjusting bolt (400) and a locking hook (500); The support plate (200) is vertically connected to the bottom plate (100), and the cross section of the support plate (200) is in the shape of a V. Two locking hooks (500) are hingedly connected to the upper end of the support plate (200); Threaded holes (210) are arranged at the left and right side edges of the bottom plate (100), and the threaded holes (210) are located in front of the support plate (200). The adjusting bolts (400) are connected to the threaded holes (210). The pressing plate (300) is provided with a waist-shaped hole (310) at one end and a hook opening (320) at the other end. The waist-shaped hole (310) is sleeved on one of the adjusting bolts (400).
2. The welding fixture tooling with a gas flow channel of claim 1, wherein, The welding fixture with a gas flow channel further comprises an argon connecting pipe (600). A gas flow groove (220) is arranged on the top of the bottom plate (100), and the gas flow groove (220) is in the shape of a V. The gas flow groove (220) is parallel to the support plate (200). The argon connecting pipe (600) is connected to the side of the bottom plate (100). A gas flow channel is arranged in the bottom plate (100). One end of the gas flow channel is in communication with the argon connecting pipe (600), and the other end of the gas flow channel is in communication with one end of the gas flow groove (220).
3. The welding fixture tooling with a gas flow channel of claim 1, wherein, The welding fixture with a gas flow channel further comprises a backing plate (700), which is connected to the bottom of the pressing plate (300).
4. The welding fixture tooling with a gas flow channel of claim 1, wherein, The welding fixture with a gas flow channel further comprises a stop block (800), which is connected to the left and right side edges of the support plate (200).
5. The welding fixture tooling with a gas flow channel of claim 1, wherein, The welding fixture with a gas flow channel further comprises a reinforcing plate (900), which is connected to one side of the bottom plate (100) and the other side of the support plate (200).
6. The welding fixture tooling with a gas flow channel of claim 1, wherein, A gasket (410) is sleeved on each of the adjusting bolts (400).