Welding tool for welding seam of middle cavity of small-caliber all-welded ball valve

Abstract

The utility model discloses a small-caliber all-welded ball valve middle cavity weld seam welding tool which comprises a water storage tank, a clamp, a submersible pump and a water pipe, the submersible pump is arranged in the water storage tank, the water pipe comprises a water inlet pipe, a water outlet and a water drainage pipe, and the water drainage port of the submersible pump is connected with the water inlet pipe. According to the all-welded ball valve, the circulating water system is arranged, so that water can continuously flow in the all-welded ball valve, the all-welded ball valve is continuously cooled in the welding process, channel water cooling measures are added, soft sealing materials of a valve cavity are fully and timely protected, welding deformation of metal is reduced, meanwhile, the welding efficiency of the valve is improved, and the service life of the valve is prolonged. The valve sealing performance is ensured.

Description

Technical Field

[0001] The utility model relates to the field of fully welded ball valves, in particular to a welding tool for a central cavity weld of a small-caliber fully welded ball valve. Background Art

[0002] Compared with bolted ball valves, fully welded ball valves have fewer external leakage points, greatly reducing the risk of valve leakage, so they are widely used in long-distance pipelines.

[0003] However, in the actual production process, welding will generate a lot of heat, forming an instantaneous high temperature environment. Under the influence of high temperature environment, soft sealing materials face rapid aging or even damage, and metal welding deformation will be caused, further affecting the valve sealing performance. Especially for small-caliber fully welded ball valves, because of their small valve cavity, the temperature will rise rapidly, which brings great challenges to welding.

[0004] The existing small-caliber fully welded ball valve adopts the welding process of filling the middle cavity with water in the fully closed state. After a short welding time, the valve needs to be immediately immersed in water for cooling. Because the valve specifications are small and the volume of the middle cavity is relatively small, the temperature of the valve cavity will rise rapidly in a short welding time. In order to protect the soft sealing material and prevent excessive metal welding deformation, the valve must be immersed in water for cooling. After it is completely cooled, the valve is taken out and blown dry before continuing welding. In this way, the soft sealing material cannot be protected in time at the moment of temperature rise. At the same time, due to the high frequency of water cooling turnover of the whole machine, the valve welding efficiency is greatly reduced. Utility Model Content

[0005] The utility model proposes a small-caliber fully welded ball valve cavity weld welding tool, which adopts a circulating water-cooled welding cooling method to remove high temperature through continuously circulating water, thereby protecting the soft sealing material of the valve cavity and reducing the welding deformation of the metal, and also improving the welding efficiency of the valve.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a small-diameter fully welded ball valve cavity weld welding tool, including a water reservoir, a clamp, a submersible pump and a water pipe, the submersible pump is arranged in the water reservoir, the water pipe includes an inlet pipe, an outlet pipe and a drain pipe, the inlet pipe includes a first inlet pipe, a second inlet pipe and a third inlet pipe, the three inlet pipes are interconnected through a three-way valve, one end of the first inlet pipe is connected to the drain port of the submersible pump, and the other end is connected to the three-way valve, one end of the second inlet pipe is connected to the water inlet of the fully welded ball valve to be welded, and the other end is connected to the three-way valve, the outlet of the fully welded ball valve to be welded is connected to one end of the outlet pipe, and the other end of the outlet pipe extends into the water reservoir, and also includes a wastewater tank, which is connected to the third inlet pipe.

[0007] Furthermore, it also includes a connecting tooling, which includes a left tooling, a right tooling and a lower tooling, the left tooling is connected to the water inlet pipe, the right tooling is connected to one end of the water outlet pipe, the other end of the water outlet pipe is connected to the water reservoir, the lower tooling is connected to one end of the drain pipe, and the other end of the drain pipe is connected to the water reservoir.

[0008] Furthermore, the tooling is a flange.

[0009] Furthermore, the clamp includes a base, on which a lower pressure block is arranged, the upper surface of the lower pressure block is connected to the upper pressure block via a plurality of electric telescopic rods, and both the lower surface of the upper pressure block and the upper surface of the lower pressure block are provided with an arc surface, a plurality of rollers are arranged for rolling in the arc surface, and parts of the plurality of rollers protrude from the arc surface.

[0010] Furthermore, a motor is arranged above the upper pressing block, and the output shaft of the motor passes through the upper pressing block and is connected to a worm. At the same time, the end of one of the rollers on the upper pressing block is connected to a worm wheel, and the worm is meshed with the worm wheel.

[0011] The utility model discloses a small-caliber fully welded ball valve center weld welding tooling with the following beneficial effects:

[0012] In the present application, a circulating water system is set up so that water can continuously flow in the fully welded ball valve, so that the fully welded ball valve can be continuously cooled during the welding process, and channel water cooling measures are added to fully and timely protect the soft sealing material of the valve cavity, reduce metal welding deformation, and at the same time improve the valve welding efficiency and ensure the valve sealing performance.

[0013] At the same time, by setting up the rolling mechanism, the rotation of the fully welded ball valve is facilitated during the welding process, so that the welding of multiple surfaces of the fully welded ball valve can be facilitated, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the welding tooling of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the clamp in the first embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the clamp in the second embodiment of the present utility model;

[0017] In the figure: 1. valve body to be welded; 2. water reservoir; 3. submersible pump; 4. first water inlet pipe; 5. second water inlet pipe; 6. third water inlet pipe; 7. water outlet pipe; 8. drain pipe; 9. left tooling; 10. right tooling; 11. lower tooling; 12. fixture; 13. wastewater tank; 14. wastewater pipe; 15. three-way valve; 16. base; 17. lower pressure block; 18. electric telescopic rod; 19. upper pressure block; 20. arc surface; 21. roller; 22. motor; 23. worm; 24. worm wheel. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Example 1: Please refer to Figure 1-Figure 2 The utility model provides a small-caliber fully welded ball valve cavity weld welding tool, which includes a water reservoir 2, a fixture 12, a submersible pump 3 and a water pipe, and also includes a host computer, which is electrically connected to the components in the welding tool to control the use of the entire welding tool.

[0021] Specifically, the water reservoir 2 stores cooling water for circulating cooling. The water pipe includes an inlet pipe, an outlet and a drain pipe for conducting cooling water.

[0022] The submersible pump 3 is arranged in the water reservoir 2 to provide power for water circulation. The cooling water outlet of the submersible pump 3 is connected with a water inlet pipe. In the present embodiment, the water inlet pipe includes a first water inlet pipe 4, a second water inlet pipe 5 and a third water inlet pipe 6. The three water inlet pipes are interconnected through a three-way valve 15. The three-way valve 15 can adjust the conductance of the first water inlet pipe 4, the second water inlet pipe 5 and the third water inlet pipe 6.

[0023] Among them, one end of the first water inlet pipe 4 is connected to the drain port of the submersible pump 3, and the other end is connected to the three-way valve 15, one end of the second water inlet pipe 5 is connected to the water inlet of the fully welded ball valve body to be welded (hereinafter referred to as the valve body to be welded 1), and the other end is connected to the three-way valve 15, one end of the third water pipe is connected to the water inlet of the wastewater tank 13, and the other end is connected to the three-way valve 15. And when working, the ball valve to be welded is in a normally open state.

[0024] Among them, the ball valve to be welded includes a water inlet, a water outlet and a sewage outlet, wherein the water inlet is connected to one end of the second water inlet pipe 5, the water outlet is connected to one end of the water outlet pipe 7, and the other end of the water outlet pipe 7 extends into the water reservoir 2, and the sewage outlet is connected to one end of the drain pipe 8, and the other end of the drain pipe 8 extends into the water reservoir 2.

[0025] The clamp 12 is used to clamp the valve body 1 to be welded, and the clamp 12 can be fixedly placed on the ground or on a workbench.

[0026] The arrow in the figure represents the direction of cooling water flow. In specific operation, when the valve body 1 to be welded needs to be welded, the valve body 1 to be welded is first clamped by the clamp 12, and then a certain amount of cooling water is stored in the water reservoir 2. At the same time, the three-way valve 15 is set to make the first water inlet pipe 4 and the second water inlet pipe 5 conductive, so that the cooling water flows to the valve body 1 to be welded. The submersible pump 3 is arranged in the water reservoir 2 to provide power for water circulation. After the submersible pump 3 is turned on, the cooling water in the water reservoir 2 passes through the first water inlet pipe 4 and the three-way valve 15. The cooling water flows through the three-way valve 15 and the second water inlet pipe 5 into the valve body 1 to be welded, so that the valve body 1 to be welded can be cooled in real time during welding. At the same time, since the valve body 1 to be welded is in a normally open state, the cooling water flows through the sewage outlet and the drain pipe 8, the water outlet and the outlet pipe 7 and then returns to the water reservoir 2, thereby completing the circulating cooling process. When the water in the water reservoir 2 needs to be replaced, the three-way valve 15 is adjusted to make the first water inlet pipe 4 and the third water inlet pipe 6 connected, so that the water in the water reservoir 2 flows into the wastewater tank 13 for treatment.

[0027] Among them, the wastewater tank 13 includes a wastewater tank 13 water inlet and a wastewater tank 13 water outlet, wherein the wastewater tank 13 water inlet is connected to the third water inlet pipe 6, and the wastewater tank 13 water outlet is connected to one end of the wastewater pipe 14, and the wastewater in the wastewater tank 13 is discharged through the wastewater pipe 14 for subsequent treatment, which is not recorded in detail in this application.

[0028] At the same time, due to the different sizes of the valve body 1 to be welded, the water pipe may not match the valve body 1 to be welded. Therefore, the present embodiment also includes a connecting tool, which includes a left tool 9, a right tool 10 and a lower tool 11. In the present embodiment, the left tool 9, the right tool 10 and the lower tool 11 are all flanges. First, according to the sizes of the water inlet, the water outlet and the sewage outlet of the valve body 1 to be welded, a flange of a suitable size is selected, and the left tool 9 is coaxially fixedly connected to the water inlet, the right tool 10 is coaxially fixedly connected to the water outlet, and the lower tool 11 is coaxially fixedly connected to the sewage outlet. Then, the left tool 9 is connected to the water inlet pipe, the right tool 10 is connected to the water outlet pipe 7, and the lower tool 11 is connected to one end of the drain pipe 8, thereby facilitating the connection between the water pipe and the valve body 1 to be welded. At the same time, a sealing ring is arranged between the tool and the valve body 1 to be welded, which also ensures the sealing of the connection. The flange installation also ensures the quickness of installation.

[0029] In this embodiment, two clamps 12 are provided, which clamp the water inlet and the water outlet of the valve body 1 to be welded from both sides respectively. The clamps 12 can be fixedly placed on the ground or on a workbench, and can be set at a suitable position according to actual needs.

[0030] The clamp 12 includes a base 16, on which a lower pressing block 17 is arranged. The lower pressing block 17 is fixedly arranged on the base 16 by a conventional fixing method of welding or bolt connection. The upper surface of the lower pressing block 17 is connected to the upper pressing block 19 through a plurality of electric telescopic rods 18. In this embodiment, four electric telescopic rods 18 are arranged, and the four electric telescopic rods 18 are arranged at the four corners of the lower pressing block 17. The telescopic movement of the electric telescopic rods 18 can drive the upper pressing block 19 to be pressed downward to clamp the valve body 1 to be welded.

[0031] The lower surface of the upper pressing block 19 and the upper surface of the lower pressing block 17 are both provided with an arc surface 20 to stably clamp the valve body 1 to be welded. At the same time, multiple rollers 21 are rolledly arranged in the arc surface 20. In this embodiment, three rollers 21 are provided, and parts of the multiple rollers 21 protrude from the arc surface 20.

[0032] During operation, when manual welding is performed, the upper pressing block 19 is pressed downward by extending and retracting the electric telescopic rod 18 until the lower pressing block 17 and the upper pressing block 19 can clamp the two ends of the valve body 1 to be welded, and the roller 21 is abutted against the outer wall of the valve body 1 to be welded, thereby limiting the position of the valve body 1 to be welded, and the valve body 1 to be welded can be specially clamped, which is convenient for subsequent processing of the valve body 1 to be welded.

[0033] The roller 21 is provided to rotate the clamped valve body 1 to be welded, and the positions of different surfaces of the valve body 1 to be welded can be processed by rotating the valve body 1 to be welded, so that the processing area is wide.

[0034] Embodiment 2:

[0035] See also Figure 3 In this embodiment, for automatic welding, a motor 22 is arranged above the upper pressing block 19, and the output shaft of the motor 22 passes through the upper pressing block 19 and is connected to a worm 23. At the same time, the end of one of the rollers 21 on the upper pressing block 19 is connected to a worm wheel 24, and the worm 23 is meshed with the worm wheel 24. At the same time, a pressure sensor (not shown in the figure) is arranged in the upper pressing block 19 to facilitate the compression of the upper pressing block 19 into place.

[0036] During specific operation, the output end of the motor 22 drives the worm 23 to rotate, and the rotation of the worm 23 drives the worm wheel 24 and further drives the roller 21 to rotate, so that the valve body 1 to be welded can be automatically rotated, ensuring the automation of the processing and improving the processing efficiency.

[0037] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A small-caliber fully welded ball valve center weld welding tool, characterized in that: It includes a water tank, a clamp, a submersible pump and a water pipe, the submersible pump is arranged in the water tank, the water pipe includes a water inlet pipe, a water outlet pipe and a drain pipe, the water inlet pipe includes a first water inlet pipe, a second water inlet pipe and a third water inlet pipe, the three water inlet pipes are interconnected through a three-way valve, one end of the first water inlet pipe is connected to the drain outlet of the submersible pump, and the other end is connected to the three-way valve, one end of the second water inlet pipe is connected to the water inlet of a fully welded ball valve to be welded, and the other end is connected to the three-way valve, the water outlet of the fully welded ball valve to be welded is connected to one end of the water outlet pipe, and the other end of the water outlet pipe extends into the water tank, and it also includes a wastewater tank, which is connected to the third water inlet pipe.

2. According to claim 1, a small-caliber fully welded ball valve cavity weld welding tool is characterized in that: It also includes a connecting tooling, which includes a left tooling, a right tooling and a lower tooling, the left tooling is connected to the water inlet pipe, the right tooling is connected to one end of the water outlet pipe, the other end of the water outlet pipe is connected to the water reservoir, the lower tooling is connected to one end of the drain pipe, and the other end of the drain pipe is connected to the water reservoir.

3. The small-caliber fully welded ball valve center weld welding tool according to claim 2, characterized in that: The tooling is a flange.

4. The small-caliber fully welded ball valve center weld welding tool according to claim 1, characterized in that: The clamp includes a base, on which a lower pressing block is arranged, the upper surface of the lower pressing block is connected to the upper pressing block via a plurality of electric telescopic rods, and both the lower surface of the upper pressing block and the upper surface of the lower pressing block are provided with an arc surface, a plurality of rollers are arranged rollingly in the arc surface, and parts of the plurality of rollers protrude from the arc surface.

5. The small-caliber fully welded ball valve center weld welding tool according to claim 4, characterized in that: A motor is arranged above the upper pressing block, and the output shaft of the motor passes through the upper pressing block and is connected to a worm. Meanwhile, the end of one of the rollers on the upper pressing block is connected to a worm wheel, and the worm is meshed with the worm wheel.

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