A reservoir welding fixture

Abstract

The application discloses a kind of reservoir welding fixture, including bottom plate, positioning assembly, limiting component and compression assembly.Limiting component includes lower support block and upper locating block, lower support block is equipped with limiting slot to fix lower cross pipe, lower support block and upper locating block are equipped with arc slot to accommodate cylinder;Positioning assembly is located between two cylinders, including positioning base and the positioning screw nut connected with upper cross pipe, positioning screw nut is detachably connected with positioning base;Compression assembly is cooperated with upper locating block and lower support block to compress cylinder.It also includes thread protection sleeve, which cooperates with the bottom plate and the limiting slot to ensure that the axis of the lower cross pipe is perpendicular to the axis of the cylinder.The positioning screw nut cooperates with the positioning base to ensure that the axis of the upper cross pipe is parallel to the axis of the cylinder.The lower support block and the upper locating block are made of brass and are used for welding heat dissipation.The application has high positioning accuracy, reduces welding deformation and oxidation.

Description

Technical Field

[0001] This invention relates to the field of thermal battery technology, specifically to a liquid reservoir welding fixture, and more particularly to a welding tooling capable of achieving precise positioning and reducing welding deformation. Background Technology

[0002] The double-cylinder reservoir is a key component of a thermal battery, typically welded together from two cylinders and upper and lower horizontal tubes. The welding quality of the reservoir directly affects the overall performance and reliability of the thermal battery product. The processing difficulty of this part lies in controlling the welding quality, especially the welding deformation of thin-walled structures and the high-temperature oxidation of the weld. Welding deformation reduces the positional accuracy of the part, while weld oxidation severely impairs the reservoir's sealing and corrosion resistance, leading to defects such as cracks and decreased mechanical properties.

[0003] To ensure the positional accuracy between components, reduce deformation caused by welding heat input, and accelerate cooling of the weld area to inhibit oxidation, a dedicated welding fixture needs to be designed. Existing general-purpose fixtures often fail to simultaneously meet the requirements of precise positioning and reliable clamping. Summary of the Invention

[0004] The present invention aims to provide a welding fixture for liquid storage containers to solve the technical problems of low part position accuracy and large welding deformation during the welding of liquid storage containers in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a liquid storage tank welding fixture, including a base plate, and further including a positioning component, a limiting component and a clamping component; the limiting component includes a lower support block and an upper positioning block, the lower support block is provided with a limiting groove for fixing the lower horizontal pipe, and both the lower support block and the upper positioning block are provided with arc-shaped grooves for accommodating the cylinder. The positioning assembly is located between the two cylinders and includes a positioning base set on the bottom plate and a positioning screw sleeve detachably connected to the upper horizontal tube. The positioning screw sleeve is detachably connected to the positioning base. The clamping assembly is used in conjunction with the upper positioning block and the lower support block to apply clamping force to the cylinder.

[0006] The working principle of this solution is as follows: The lower horizontal tube is placed into the limiting groove of the lower support block, and the two cylinders are placed into the arc-shaped grooves of the lower support block and the upper positioning block, respectively. The upper horizontal tube is connected to the positioning base through a positioning screw sleeve. The clamping assembly applies downward pressure, causing the upper positioning block and the lower support block to jointly clamp and fix the two cylinders. At the same time, the positioning assembly ensures the relative position of the upper horizontal tube and the cylinders. The entire fixture provides a reference through the base plate, forming a six-point positioning constraint on each part of the liquid reservoir.

[0007] The beneficial effects of this solution are as follows: The contour design of the limiting groove and the arc-shaped groove enables precise radial positioning of the lower horizontal tube and the two cylinders, preventing displacement during welding. The positioning assembly uses a detachable positioning screw sleeve and positioning base, facilitating the assembly and disassembly of the upper horizontal tube while ensuring the relative positional accuracy between the upper horizontal tube and the cylinders. The clamping assembly provides uniform clamping force, reducing welding thermal deformation and improving weld consistency.

[0008] Preferably, as an improvement, the positioning base has an upward-opening pin opening, and the positioning threaded sleeve has a pin block that engages with the pin opening. When installing the upper horizontal tube, first screw the positioning threaded sleeve into the threaded hole of the upper horizontal tube, and then insert the pin block on the positioning threaded sleeve into the upward-opening pin opening of the positioning base from top to bottom. The upward opening direction of the pin opening prevents the pin block from automatically dislodging under gravity, while also restricting the rotation and radial movement of the positioning threaded sleeve. This structure eliminates the need for additional locking components, reducing fixture complexity. This mating method also provides angular positioning, preventing the positioning threaded sleeve from twisting during welding.

[0009] Preferably, as an improvement, the axis of the positioning screw sleeve is parallel to the cylinder body, and it cooperates with the positioning base to ensure that the axis of the upper horizontal tube is parallel to the axes of the two cylinder bodies. After the positioning screw sleeve is engaged with the pin hole of the positioning base by the pin block, the installation position and angle of the positioning base on the base plate are pre-machined, ensuring the parallelism requirements between the upper horizontal tube and the cylinder body.

[0010] Preferably, as an improvement, the clamping assembly includes a pressure plate and a screw connected to the base plate. The upper end of the screw passes through the pressure plate and is fixed with a nut. The lower end of the screw is fixed to the base plate, while the upper end freely passes through a through hole in the pressure plate. After placing the pressure plate above the object to be clamped (such as the upper positioning block or the lower support block), tightening the nut pushes the pressure plate downward, thereby transmitting pressure to the upper positioning block, the lower support block, and the cylinder below.

[0011] Preferably, as an improvement, there are two clamping components, one of which has a pressure plate that cooperates with the base plate to clamp the upper positioning block and the two cylinders. The two clamping components act at different positions: one pressure plate directly clamps the upper positioning block, causing the upper positioning block to press the upper parts of the two cylinders together; the other pressure plate acts on the lower support block or the lower part of the cylinder. The combined clamping from both above and below provides constraint on the cylinders in both the axial and radial directions, improving positioning accuracy.

[0012] Preferably, as an improvement, a threaded protective sleeve is also included. A through hole for mounting the threaded protective sleeve is provided on the base plate below the limiting groove. The threaded protective sleeve cooperates with the base plate and the limiting groove to reinforce the position of the lower horizontal tube, ensuring that the axis of the lower horizontal tube is perpendicular to the axes of the two cylinders. After the lower horizontal tube is placed into the limiting groove of the lower support block, its threaded hole is aligned with the through hole on the base plate. The threaded protective sleeve is passed through the through hole in the base plate and screwed into the threaded hole of the lower horizontal tube. The outer wall of the threaded protective sleeve mates with the through hole in the base plate, and the internal thread mates with the threaded hole of the lower horizontal tube, thereby constraining all rotational freedom and axial movement of the lower horizontal tube, while simultaneously limiting the direction of the threaded hole axis—making it perpendicular to the plane of the base plate. Since the axes of the two cylinders are parallel to the plane of the base plate, the axis of the threaded hole of the lower horizontal tube is perpendicular to the axis of the cylinder. This mechanical cooperation forcibly ensures the critical angular relationship of "perpendicularity," resulting in high precision and stability.

[0013] Preferably, as an improvement, both the lower support block and the upper positioning block are made of brass. Brass has a high thermal conductivity (approximately 100~20 W / (m·K)), far exceeding that of ordinary steel. When the welding arc heats the cylinder and the weld area, heat is rapidly conducted through the contact surface to the brass lower support block and upper positioning block, and is absorbed by the blocks and dissipated into the air. Due to the accelerated heat dissipation, the high-temperature residence time in the weld area is significantly shortened, while the overall temperature rise of the cylinder is reduced. This rapid heat dissipation significantly reduces the welding thermal deformation of the thin-walled cylinder, ensuring the roundness and dimensional accuracy of the cylinder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a liquid storage container welding fixture structure according to an embodiment of the present invention; Figure 2 This is a partial enlarged view of an embodiment of the present invention.

[0015] The reference numerals in the accompanying drawings of the instruction manual include: base plate 1, lower support block 2, limiting groove 201, arc groove 3, upper positioning block 4, positioning base 5, pin 501, positioning screw sleeve 6, pin block 601, pressure plate 7, wing nut 8, screw 9, cylinder 10, upper horizontal tube 11, and lower horizontal tube 12. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method: like Figure 1 and Figure 2 As shown, this embodiment provides a liquid reservoir welding fixture for fixing a liquid reservoir composed of two cylinders 10, an upper horizontal pipe 11, and a lower horizontal pipe 12 during the welding process. The fixture includes a base plate 1, a positioning assembly, a limiting assembly, and a clamping assembly.

[0017] The base plate 1 is a flat plate that serves as the mounting reference for the entire fixture. Multiple threaded holes and through holes are provided on the base plate 1 for connecting other components.

[0018] The limiting assembly includes a lower support block 2 and an upper positioning block 4. The lower support block 2 is placed on the base plate 1, and a limiting groove 201 for fixing the lower horizontal tube 12 is formed in the middle of its upper surface. The shape of the limiting groove 201 matches the outer wall of the lower horizontal tube 12. The lower support block 2 also has two arc-shaped grooves 3 for accommodating the two cylinders 10. The axis of the arc-shaped grooves 3 is perpendicular to the axis of the limiting groove 201.

[0019] The upper positioning block 4 is located at the other end of the two cylinders 10 and above the corresponding position of the upper horizontal tube 11. Its lower surface has two arc-shaped grooves 3 for accommodating the two cylinders 10, which cooperate with the arc-shaped grooves 3 of the lower support block 2 to hold the two cylinders 10 together.

[0020] The positioning assembly, located between the two cylinders 10, includes a positioning base 5 and a positioning threaded sleeve 6. The positioning base 5 is fixedly connected to the base plate 1 by screws and is situated in the gap between the two cylinders 10. The upper end of the positioning base 5 has an upward-opening pin opening 501, which is U-shaped. The positioning threaded sleeve 6 engages with a threaded hole in the upper horizontal tube 11. The positioning threaded sleeve 6 extends outward along its axial direction to form a pin block 601, the shape of which matches the pin opening 501 on the positioning base 5. The pin block 601 can be engaged from above into the pin opening 501, achieving a detachable connection between the positioning threaded sleeve 6 and the positioning base 5. The axis of the positioning threaded sleeve 6 is parallel to the axes of the two cylinders 10, thus ensuring that the axis of the upper horizontal tube 11 is parallel to the axes of the two cylinders 10.

[0021] There are two clamping assemblies, each consisting of a pressure plate 7, a screw 9, and a wing nut 8. The lower end of the screw 9 is fixedly connected to the base plate 1, while the upper end is free. A through hole is provided on the pressure plate 7, through which the upper end of the screw 9 passes. The wing nut 8 is screwed onto the upper end of the screw 9 and clamps the pressure plate 7.

[0022] In the first clamping assembly, the pressure plate 7 presses directly onto the upper surface of the upper positioning block 4 and is locked by the wing nut 8, so that the upper positioning block 4 and the lower support block 2 together clamp the two cylinders 10. In the second clamping assembly, the pressure plate 7 presses at an appropriate position on the cylinder 10 for auxiliary fixing.

[0023] A through hole is formed on the base plate 1, directly below the limiting groove 201 of the lower support block 2. A threaded protective sleeve passes through this through hole, with its outer wall fitting against the through hole and its internal thread engaging with the threaded hole of the lower horizontal tube 12. The threaded protective sleeve connects the lower end of the lower horizontal tube 12 to the base plate 1 as a whole, restricting the rotation and axial movement of the lower horizontal tube 12. The axis of the lower horizontal tube 12 is determined by the limiting groove 201, and since the axis of the threaded protective sleeve is perpendicular to the axis of the limiting groove 201, it ensures that the axis of the lower horizontal tube 12 is perpendicular to the axes of the two cylinders 10.

[0024] In this design, both the lower support block 2 and the upper positioning block 4 are made of brass, utilizing the high thermal conductivity of brass to achieve rapid heat dissipation during the welding process.

[0025] When welding a liquid reservoir using this embodiment, follow these steps to achieve its function: First, screw the positioning sleeve 6 into the threaded hole of the upper horizontal tube 11, and then insert the pin block 601 of the positioning sleeve 6 into the pin opening 501 of the positioning base 5 from above. Since the positioning base 5 is fixed to the base plate 1 and the orientation of its pin opening 501 is precision machined, the axis of the positioning sleeve 6 is forced to remain parallel to the axes of the two cylinders 10, thus ensuring that the axis of the upper horizontal tube 11 is parallel to the axes of the two cylinders 10. The upward-opening design of the pin opening 501 prevents the positioning sleeve 6 from coming off by itself under gravity, while also restricting the rotation and radial displacement of the upper horizontal tube 11.

[0026] The lower horizontal tube 12 is placed into the limiting groove 201 of the lower support block 2. Then, the threaded protective sleeve is inserted from below the through hole of the base plate 1 and screwed into the threaded hole of the lower horizontal tube 12. The fit between the threaded protective sleeve and the through hole of the base plate 1 restricts the radial movement of the threaded protective sleeve, thereby precisely fixing the lower end of the lower horizontal tube 12 to the base plate 1, keeping the axis of the lower horizontal tube 12 parallel to the plane of the base plate 1. At the same time, since the two cylinders 10 are placed in the arc-shaped groove 3 of the lower support block 2 and the axis of the cylinders 10 is parallel to the plane of the base plate 1, the axis of the lower horizontal tube 12 is naturally perpendicular to the axis of the two cylinders 10. The threaded protective sleeve also protects the threaded hole from spatter damage during the welding process.

[0027] Next, the two cylinders 10 are placed into the two arc-shaped grooves 3 of the lower support block 2, and then the upper positioning block 4 is fastened above the two cylinders 10, so that the arc-shaped grooves 3 fit against the upper surface of the cylinders 10. At this time, the radial and axial directions of the two cylinders 10 are constrained by the arc-shaped grooves 3 of the lower support block 2 and the upper positioning block 4.

[0028] Next, the screws 9 of the two clamping components are passed through the corresponding pressure plates 7, and the nuts are tightened. The pressure plate 7 of the first clamping component presses down on the upper surface of the upper positioning block 4, applying downward pressure so that the upper positioning block 4 and the lower support block 2 together clamp the two cylinders 10. The pressure plate 7 of the second clamping component clamps the lower support block 2 or other parts as needed, forming a two-point clamping, so that the cylinder 10 is subjected to uniform force.

[0029] During welding, the heat generated by the electric arc is conducted to the cylinder 10. Since both the lower support block 2 and the upper positioning block 4 are made of brass, whose thermal conductivity is much higher than that of steel, the heat is rapidly absorbed by the brass blocks through the contact surface and dissipated into the air, significantly reducing the high-temperature residence time of the cylinder 10 and the weld area. This reduces thermal deformation of the thin-walled cylinder 10, ensuring the roundness and dimensional accuracy of the cylinder 10 after welding; furthermore, rapid cooling inhibits high-temperature oxidation of the weld metal, improving the weld's sealing and corrosion resistance, and reducing the risk of brittle phases and cracks.

[0030] After welding, loosen the nut, remove the pressure plate 7, and lift the positioning screw sleeve 6 upwards to disengage its pin block 601 from the pin opening 501, then remove the upper horizontal tube 11; unscrew the threaded protective sleeve to remove the lower horizontal tube 12 and the two cylinders 10. The entire operation process is convenient and efficient, and the welded parts have high positional accuracy, minimal deformation, and good weld quality.

[0031] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A welding fixture for a liquid reservoir, comprising a base plate, characterized in that: It also includes a positioning component, a limiting component, and a clamping component; the limiting component includes a lower support block and an upper positioning block, the lower support block is provided with a limiting groove for fixing the lower horizontal tube, and both the lower support block and the upper positioning block are provided with arc-shaped grooves for accommodating the cylinder. The positioning assembly is located between the two cylinders and includes a positioning base set on the bottom plate and a positioning screw sleeve detachably connected to the upper horizontal tube. The positioning screw sleeve is detachably connected to the positioning base. The clamping assembly is used in conjunction with the upper positioning block and the lower support block to apply clamping force to the cylinder.

2. The liquid storage tank welding fixture according to claim 1, characterized in that: The positioning base is provided with an upward-opening pin opening, and the positioning screw sleeve is provided with a pin block that engages with the pin opening.

3. The liquid storage tank welding fixture according to claim 2, characterized in that: The axis of the positioning screw sleeve is parallel to the cylinder body and cooperates with the positioning base to ensure that the axis of the upper horizontal tube is parallel to the axes of the two cylinder bodies.

4. The liquid storage tank welding fixture according to claim 1, characterized in that: The clamping assembly includes a pressure plate and a screw connected to the base plate. The upper end of the screw passes through the pressure plate and is fixed with a nut.

5. A liquid storage tank welding fixture according to claim 4, characterized in that: There are two clamping components, one of which has a pressure plate that cooperates with the base plate to clamp the upper positioning block and the two cylinders.

6. A liquid storage tank welding fixture according to claim 1, characterized in that: It also includes a threaded protective sleeve. A through hole is provided on the bottom plate below the limiting groove for installing the threaded protective sleeve. The threaded protective sleeve cooperates with the bottom plate and the limiting groove to reinforce the position of the lower horizontal tube, so as to ensure that the axis of the lower horizontal tube is perpendicular to the axis of the two cylinders.

7. A liquid storage tank welding fixture according to claim 1, characterized in that: Both the lower support block and the upper positioning block are made of brass.

Images