Pressure-adjustable high-to-low pressure gas supply device

Abstract

The application relates to the technical field of air supply devices, and discloses a pressure-adjustable air supply device for converting high pressure into low pressure, which comprises an air supply tank, four air supply pipes are fixedly arranged at the rear side of the top of the air supply tank, a valve is fixedly installed on the front side of each of the four air supply pipes, a pressure reducing valve is screwedly installed at the front end of the valve, and a moving assembly and a mounting assembly are arranged at the top of the air supply tank. The pressure-adjustable air supply device for converting high pressure into low pressure, after the valve is closed to the air supply pipe, the rotary motor and the first electric telescopic rod are started to retract forward, the pressure reducing valve is rotated out from the front end of the valve, the driving motor is started to rotate the lead screw, the moving block screw-connected to the surface of the lead screw is moved leftward or rightward, the pressure reducing valve is moved back and forth between the four air supply pipes to be installed, the mode of arranging the pressure reducing valve at each air supply pipe is replaced, the pressure regulating cost of the output pipeline of the air supply device is reduced, and thus the pressure regulation of the output pipeline of the air supply device is facilitated.

Description

Technical Field

[0001] This invention relates to the field of gas supply device technology, specifically to a pressure-adjustable high-pressure to low-pressure gas supply device. Background Technology

[0002] The gas supply system refers to providing a stable flow of protective gas to the welding area. It consists of gas cylinders, pressure reducing valves, preheaters, flow meters, dryers, and pipelines. The gas supply unit has multiple supply pipelines, each requiring a pressure reducing valve. This increases the complexity of the gas supply unit's output pipeline installation, increases pressure regulation costs, and makes pressure adjustment inconvenient. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a pressure-adjustable high-pressure to low-pressure gas supply device, which has advantages such as reducing the number of pressure-reducing valves required, simplifying the installation of gas supply pipelines, and reducing pressure regulation costs. It solves the problem that traditional gas supply devices require a pressure-reducing valve to be installed at each gas supply pipeline, which increases the installation complexity of the gas supply device's output pipeline, and results in high pressure regulation costs and inconvenience for adjusting the pressure of the gas supply device's output pipeline.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure-adjustable high-pressure to low-pressure gas supply device, comprising a gas supply box, four gas supply pipes fixedly installed on the rear side of the top of the gas supply box, valves fixedly installed on the front of each of the four gas supply pipes, a pressure reducing valve threadedly installed at the front end of each valve, and a moving component and a mounting component provided on the top of the gas supply box.

[0007] The moving component includes a moving block, the bottom of which is slidably connected to the top of the air supply box. A first electric telescopic rod is fixedly installed on the back of the moving block. The mounting component includes a U-shaped block, the output end of which is fixedly connected to the front of the U-shaped block. The bottom of the U-shaped block is slidably connected to the top of the air supply box. A rotary motor is fixedly installed on the top of the U-shaped block, and the output end of which is fixedly connected to the front of the pressure reducing valve.

[0008] Preferably, an air inlet pipe is fixedly installed on the front of the air supply box, and a control interface is fixedly installed on the right side of the air supply box. The air inlet pipe is connected to the air inlet device to allow gas to be input into the air supply box, and the control interface is used for the air supply pressure regulation operation of the air supply box.

[0009] Preferably, the top of the gas supply tank is fixedly provided with a fixed block on the left and right sides, the opposite side of the two fixed blocks is rotatably connected with a lead screw, the side surface of the lead screw is threadedly connected with a moving block, and the lead screw can drive the moving block threadedly connected on the surface to move leftward or rightward when the lead screw rotates, so that the uninstalled pressure reducing valve can be moved to the corresponding gas supply pipe.

[0010] Preferably, the right side of the right fixed block is fixedly provided with a driving motor, the output end of the driving motor is fixedly connected with the right end of the lead screw, the driving motor can be switched between forward and reverse rotation, so that the uninstalled pressure reducing valve can be moved leftward or rightward to any gas supply pipe.

[0011] Preferably, the top of the gas supply tank is fixedly provided with a connecting block, the connecting block is slidably connected with the inside of the U-shaped block, when the connecting block is matched with the inside of the U-shaped block, the pressure reducing valve is in an uninstalled state, and the pressure reducing valve cannot be moved backward for installation, so that the uninstalled pressure reducing valve can be moved leftward or rightward between the four gas supply pipes.

[0012] Preferably, the number of the connecting blocks is four, the left and right sides of the U-shaped block are slidably connected with the opposite sides of two connecting blocks, when the U-shaped block is moved leftward or rightward between the two connecting blocks, the U-shaped block can be pushed backward by the first electric telescopic rod at the same time that the rotary motor is started, so that the pressure reducing valve can be rotated backward and screwed with the front end of the valve of the gas supply pipe, thereby facilitating the installation of the pressure reducing valve on the gas supply pipe.

[0013] Preferably, the right side of the four valves is rotatably connected with a switch gear, the back of the U-shaped block is fixedly provided with a second electric telescopic rod, the output end of the second electric telescopic rod is fixedly connected with a rack, and the top of the rack is engaged with the side surface of the switch gear, when the pressure reducing valve is screwed with the front end of the valve of the gas supply pipe, the second electric telescopic rod is started to extend backward, the rack is pushed to move backward, the switch gear engaged with the top of the rack is rotated, the valve is opened, and the pressure reducing valve is communicated with the gas supply pipe, thereby facilitating the pressure reducing valve to adjust the pressure of the gas supply pipe.

[0014] Compared with the prior art, the present application provides a pressure-adjustable high-to-low pressure gas supply device, which has the following advantages:

[0015] 1. The pressure-adjustable high-to-low pressure gas supply device, by setting the moving block, the first electric telescopic rod, the U-shaped block, the rotary motor, the screw rod and the connecting block, when the valve closes the gas supply pipe, the rotary motor and the first electric telescopic rod are started to retract forward, so that the rear end of the pressure reducing valve is rotated forward from the front end of the valve, and then the driving motor is started to rotate the screw rod, which drives the moving block connected with the screw rod surface threads to move left or right, so that the pressure reducing valve moves back and forth between the four gas supply pipes to switch installation, replacing the mode of installing pressure reducing valves at each gas supply pipe, reducing the pressure regulating cost of the gas supply device output pipeline, thereby facilitating the pressure regulation of the gas supply device output pipeline.

[0016] 2. The pressure-adjustable high-to-low pressure gas supply device, by setting the valve, the pressure reducing valve, the switch gear, the second electric telescopic rod and the rack, when the U-shaped block moves left and right between the two connecting blocks, the first electric telescopic rod is started to extend backward and the rotary motor is reversed, so that the pressure reducing valve is rotated backward and is screwed with the front end of the valve of the gas supply pipe, and then the second electric telescopic rod is started to extend backward, which drives the rack to move backward, so that the switch gear meshed with the top of the rack is rotated, so that the valve is opened and the pressure reducing valve is communicated with the gas supply pipe, thereby facilitating the pressure reduction regulation of the pressure reducing valve to the gas supply pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure diagram of the pressure-adjustable high-to-low pressure gas supply device of the present application;

[0018] Figure 2 The structure diagram of the pressure-adjustable high-to-low pressure gas supply device of the present application; Figure 1 The enlarged view of structure A in the present application;

[0019] Figure 3 The structure diagram of the moving installation assembly of the present application.

[0020] Wherein: 1, gas supply tank; 2, gas supply pipe; 3, valve; 4, pressure reducing valve; 5, moving block; 6, first electric telescopic rod; 7, U-shaped block; 8, rotary motor; 9, air inlet pipe; 10, control interface; 11, fixed block; 12, screw rod; 13, driving motor; 14, connecting block; 15, switch gear; 16, second electric telescopic rod; 17, rack. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Please refer to Figures 1-3A pressure-adjustable high-to-low pressure gas supply device, comprising a gas supply tank 1, four gas supply pipes 2 fixedly arranged at the rear side of the top of the gas supply tank 1, a gas supply mechanism flange-connected with the gas supply pipes 2, and a valve 3 fixedly installed on the front side of each of the four gas supply pipes 2. The valve 3 is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters (temperature, pressure and flow) of a conveying medium, and is a control component in a pipeline fluid conveying system for changing a passage section and a medium flow direction, and has the functions of flow guiding, cutting off, throttling, non-return, shunting or overflow pressure relief. The valve 3 is a shut-off ball valve, the valve core of the ball valve is a perforated ball, the valve core is fully open when the perforation of the ball body is aligned with the pipeline axis, and is fully closed when it is turned by 90°. The ball valve has certain adjusting performance and is tightly closed. Before installation of the valve, it is necessary to carefully check whether the type and specification of the valve used are consistent with the design, and to check whether the valve can be applied under the required conditions according to the type and factory instruction manual of the valve. When installing the valve, the forced alignment connection method of pulling hard should not be used to avoid damage caused by uneven force. The working pressure of the valve should be greater than the working pressure of the pipeline, and the sealing performance of the valve refers to the ability of the sealing parts of the valve to prevent leakage of the medium, which is the most important technical performance index of the valve. The sealing parts of the valve are three: the contact between the opening and closing element and the valve seat; the cooperation between the packing and the valve stem and the packing box; and the connection between the valve body and the valve cover. The leakage between the first two places is called internal leakage, which will affect the ability of the valve to cut off the medium. For shut-off valves, internal leakage is not allowed. The leakage between the last two places is called external leakage, i.e. leakage of the medium from the inside of the valve to the outside of the valve. External leakage will cause material loss, environmental pollution and even accidents in severe cases. For flammable, explosive, toxic or radioactive media, external leakage is not allowed. Therefore, the valve must have reliable sealing performance.

[0023] The front end of the valve 3 is threaded with a pressure reducing valve 4, which is a valve that reduces the inlet pressure to a desired outlet pressure by adjusting and relies on the energy of the medium itself to automatically maintain the outlet pressure stable. It is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid change, causing different pressure losses, thereby achieving pressure reduction, and then relying on the adjustment of the control and adjustment system to balance the fluctuations in the pressure behind the valve with the spring force, so that the pressure behind the valve remains constant within a certain error range; When operating, close the gate valve in front of the pressure reducing valve and open the gate valve behind the pressure reducing valve to create a low pressure environment downstream, rotate the adjusting screw counterclockwise to the uppermost position (relative to the lowest outlet pressure), then close the gate valve behind the pressure reducing valve, slowly open the gate valve in front of the pressure reducing valve to full open, and slowly rotate the adjusting screw clockwise to adjust the outlet pressure to the required pressure (based on the pressure behind the valve), and then lock the screw nut, open the gate valve behind the pressure reducing valve. If the outlet pressure is higher than the set pressure during adjustment, it must be adjusted from the first step, that is, it can only be adjusted from low pressure to high pressure. The top of the gas supply tank 1 is provided with a moving assembly and a mounting assembly, the front of the gas supply tank 1 is fixedly provided with an air inlet pipe 9, the air inlet pipe 9 is communicated with an air inlet device to input gas into the gas supply tank 1, and the right side of the gas supply tank 1 is fixedly provided with a control interface 10. The control interface 10 is used for gas supply pressure regulating operation of the gas supply tank 1.

[0024] The moving assembly comprises a moving block 5, two fixed blocks 11 are fixedly arranged on the top of the gas supply box 1, the opposite sides of the two fixed blocks 11 are rotationally connected with lead screws 12, the side surfaces of the lead screws 12 are in threaded connection with the inside of the moving block 5, when the lead screws 12 rotate, the moving block 5 connected with the surfaces of the lead screws 12 in threads can move leftward or rightward, so as to move the uninstalled pressure reducing valve 4 to the corresponding gas supply pipe 2, the right side of the right fixed block 11 is fixedly installed with a driving motor 13, the output end of the driving motor 13 is fixedly connected with the right end of the lead screw 12, the driving motor 13 can be switched in positive and reverse rotation, so that the uninstalled pressure reducing valve 4 can move leftward or rightward to any gas supply pipe 2, the bottom of the moving block 5 is in sliding connection with the top of the gas supply box 1, the back of the moving block 5 is fixedly installed with a first electric telescopic rod 6, the installation assembly comprises a U-shaped block 7, the output end of the first electric telescopic rod 6 is fixedly connected with the front of the U-shaped block 7, the top of the gas supply box 1 is fixedly arranged with connecting blocks 14, the connecting blocks 14 are in sliding connection with the inside of the U-shaped block 7, when the connecting blocks 14 are matched with the inside of the U-shaped block 7, at this time, the pressure reducing valve 4 is in an uninstalled state, and the pressure reducing valve 4 cannot be moved backward for installation operation, so as to facilitate the uninstalled pressure reducing valve 4 to move leftward or rightward between the four gas supply pipes 2, the number of the connecting blocks 14 is four, the left and right sides of the U-shaped block 7 are respectively in sliding connection with the opposite sides of the two connecting blocks 14, when the U-shaped block 7 moves leftward or rightward to between the two connecting blocks 14, at this time, the U-shaped block 7 can be pushed backward by the first electric telescopic rod 6, at the same time, the rotary motor 8 is started, so as to make the pressure reducing valve 4 rotate backward and be screwed with the front end of the valve 3 of the gas supply pipe 2, so as to facilitate the installation operation of the pressure reducing valve 4 on the gas supply pipe 2, the bottom of the U-shaped block 7 is in sliding connection with the top of the gas supply box 1.

[0025] The top of the U-shaped block 7 is fixedly provided with a rotary motor 8, the output end of the rotary motor 8 is fixedly connected with the front face of the pressure reducing valve 4, the moving block 5, the first electric telescopic rod 6, the U-shaped block 7, the rotary motor 8, the lead screw 12 and the connecting block 14 are arranged, when the valve 3 is closed to the gas supply pipe 2, the rotary motor 8 and the first electric telescopic rod 6 are started to retract forward, so that the rear end of the pressure reducing valve 4 is rotated forward from the front end of the valve 3, at this time, the U-shaped block 7 moves forward to between the two connecting blocks 14, then the lead screw 12 is rotated by starting the driving motor 13, the moving block 5 connected with the surface threads of the lead screw 12 is moved leftward or rightward, so that the pressure reducing valve 4 is moved back and forth between the four gas supply pipes 2 to switch installation, which replaces the mode that the pressure reducing valve 4 is installed at each gas supply pipe, reduces the pressure regulating cost of the gas supply device output pipeline, so as to facilitate the pressure regulation of the gas supply device output pipeline, the right side of the four valves 3 is rotatably connected with the switch gear 15, before the pressure reducing valve 4 is disassembled, the second electric telescopic rod 16 is controlled to retract forward, so that the rack 17 is moved forward to drive the switch gear 15 to rotate, so that the valve 3 is closed to cut off between the gas supply pipe 2 and the pressure reducing valve 4, the right side of the back face of the U-shaped block 7 is fixedly provided with the second electric telescopic rod 16, the output end of the second electric telescopic rod 16 is fixedly connected with the rack 17, the top of the rack 17 is engaged with the side surface of the switch gear 15, the valve 3, the pressure reducing valve 4, the switch gear 15, the second electric telescopic rod 16 and the rack 17 are arranged, when the U-shaped block 7 moves leftward and rightward to between the two connecting blocks 14, the first electric telescopic rod 6 is started to extend backward and the rotary motor 8 is reversed, so that the pressure reducing valve 4 is rotated backward and is screwed with the front end of the valve 3 of the gas supply pipe 2, then the second electric telescopic rod 16 is started to extend backward, so that the rack 17 is moved backward, the switch gear 15 engaged with the top of the rack 17 is rotated, so that the valve 3 is opened and the pressure reducing valve 4 is communicated with the gas supply pipe 2, so as to facilitate the pressure reduction regulation of the pressure reducing valve 4 to the gas supply pipe 2.

[0026] In use, the second electric telescopic rod 16 is started to retract forward, the rack 17 is moved forward to drive the switch gear 15 to rotate, the valve 3 is closed to cut off the supply pipe 2 and the pressure reducing valve 4, then the rotary motor 8 and the first electric telescopic rod 6 are started to retract forward, the rear end of the pressure reducing valve 4 is rotated forward from the front end of the valve 3, at this time the U-shaped block 7 moves to the two connecting blocks 14, the lead screw 12 is rotated by starting the driving motor 13, the moving block 5 connected with the surface screw thread of the lead screw 12 is moved left or right, the U-shaped block 7 slides left and right on the connecting block 14 on the top of the gas supply tank 1, when the U-shaped block 7 moves to the other two connecting blocks 14, the first electric telescopic rod 6 is started to extend backward and the rotary motor 8 is reversed, the pressure reducing valve 4 is rotated backward and is screwed with the front end of the valve 3 of the supply pipe 2, then the second electric telescopic rod 16 is started to extend backward, the rack 17 is moved backward to drive the switch gear 15 on the top of the rack 17 to rotate, the valve 3 is opened, the pressure reducing valve 4 is communicated with the supply pipe 2, so that the pressure reducing valve 4 is adjusted to the supply pipe 2. The pressure-adjustable high-to-low pressure gas supply device, the pressure reducing valve 4 can be moved and switched between the four supply pipes 2, without being equipped with a pressure reducing valve at each output pipe, the number of pressure reducing valves 4 is reduced, the pressure adjusting cost of the gas supply device output pipe is reduced, the pressure reducing valve 4 is convenient to install and disassemble, so that the pressure of the gas supply device output pipe is adjusted.

[0027] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A pressure-adjustable high-pressure to low-pressure gas supply device, comprising a gas supply box (1), characterized in that: Four gas supply pipes (2) are fixedly installed on the rear side of the top of the gas supply box (1). Valves (3) are fixedly installed on the front of the four gas supply pipes (2). A pressure reducing valve (4) is threaded on the front end of the valve (3). A moving component and an installation component are provided on the top of the gas supply box (1). The moving component includes a moving block (5), the bottom of which is slidably connected to the top of the air supply box (1), and a first electric telescopic rod (6) is fixedly installed on the back of the moving block (5). The mounting component includes a U-shaped block (7), the output end of which is fixedly connected to the front of the U-shaped block (7), the bottom of which is slidably connected to the top of the air supply box (1), and a rotary motor (8) is fixedly installed on the top of the U-shaped block (7). The output end of the rotary motor (8) is fixedly connected to the front of the pressure reducing valve (4). An air inlet pipe (9) is fixedly installed on the front of the air supply box (1). A control interface (10) is fixedly installed on the right side of the air supply box (1). Fixing blocks (11) are fixedly installed on both the left and right sides of the top of the air supply box (1). A lead screw (12) is rotatably connected to the opposite side of the two fixing blocks (11). The side surface of the lead screw (12) is threadedly connected to the inside of the moving block (5). Switch gears (15) are rotatably connected to the right side of the four valves (3). A second electric telescopic rod (16) is fixedly installed on the right side of the back of the U-shaped block (7). A rack (17) is fixedly connected to the output end of the second electric telescopic rod (16). The top of the rack (17) meshes with the side surface of the switch gear (15). A drive motor (13) is fixedly installed on the right side of the fixed block (11) on the right side. The output end of the drive motor (13) is fixedly connected to the right end of the lead screw (12). A connecting block (14) is fixedly installed on the top of the air supply box (1). The connecting block (14) is slidably connected to the inside of the U-shaped block (7). There are four connecting blocks (14). The left and right sides of the U-shaped block (7) are slidably connected to the opposite side of the two connecting blocks (14) respectively.

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