A surge tank for a laser processing system

Abstract

The utility model discloses a buffer tank for laser processing system, including the jar body, the left side intercommunication of jar body has first air supplement valve, the right side intercommunication of jar body has gas supply valve, first air supplement valve and gas supply valve are all normally open state, the left side intercommunication of jar body is located first air supplement valve top's second air supplement valve, second air supplement valve is normally closed state, the valve core place transmission of second air supplement valve is connected with valve stem, valve stem can control second air supplement valve to jar body inside supplement gas pressure, the inside of jar body is provided with pressure response structure, the utility model discloses through setting normally closed second air supplement valve, and cooperate inside pure mechanical type pressure response structure, realized direct monitoring and response to the pressure change in jar, got rid of the dependence on the electronic pressure sensor of needing external power supply, fundamentally solved the sensor failure problem caused by power interruption, instability or exhaustion.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, specifically a buffer tank for a laser processing system. Background Technology

[0002] "Laser processing buffer tank" refers to a key auxiliary gas storage device in the protective gas supply system of laser processing equipment (such as laser cutting machine and laser welding machine) used to stabilize gas pressure and flow. Its core function is to ensure that the laser processing area receives a continuous, stable and pure supply of protective gas / auxiliary gas, thereby improving processing quality, protecting the optical system and meeting specific process requirements.

[0003] For example, patent application number 201210232771.4 published on the China Patent Network, entitled "Nitrogen Supply Device for Laser Processing Machine," describes a method for supplying nitrogen generated by a PSA device to a laser processing machine. Nitrogen generated using a PSA device is pressurized by a first pressurizer and stored in a buffer tank. When the pressure in the buffer tank is high, nitrogen is supplied to the laser processing machine via the first nitrogen supply path. When the pressure in the buffer tank is low, nitrogen pressurized by a second pressurizer via a second nitrogen supply path is supplied to the laser processing machine. The two paths are switched by using a pressure switch that detects the pressure in the buffer tank to control the opening and closing of valves located in each path.

[0004] However, existing supply devices rely on a relatively simple method to identify pressure, mainly using pressure sensors to detect pressure. Most pressure sensors require an external power source to operate. If the power supply is interrupted, unstable, or the battery is depleted, the sensor will not work or will provide incorrect data.

[0005] Therefore, the buffer tank used in laser processing systems needs to be redesigned and modified. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a buffer tank for a laser processing system, which has the advantage of improving detection accuracy. It solves the problem that the existing supply devices have a relatively simple method of pressure identification, mainly relying on pressure sensors to detect pressure. Most pressure sensors require an external power source to work, and if the power supply is interrupted, unstable, or the battery is depleted, the sensor will not work or will provide incorrect data.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a buffer tank for a laser processing system, comprising a tank body;

[0008] The left side of the tank is connected to a first air replenishment valve, and the right side of the tank is connected to an air supply valve. Both the first air replenishment valve and the air supply valve are normally open. The left side of the tank is connected to a second air replenishment valve located on top of the first air replenishment valve. The second air replenishment valve is normally closed. A valve stem is driven to the valve core of the second air replenishment valve. The valve stem can control the second air replenishment valve to replenish air pressure into the tank. The tank is equipped with a pressure sensing structure, which can sense the air pressure inside the tank and control the second air replenishment valve to open.

[0009] As a preferred embodiment of this utility model, the pressure sensing structure includes a piston disposed inside the tank body, the outer surface of the piston being in contact with the inner wall of the tank body, and the tank body being able to use air pressure to pull the piston downward when the internal pressure of the tank body decreases. A transmission structure is provided at the top of the tank body, and the transmission structure is able to control the opening of the second air supply valve when the piston descends.

[0010] In a preferred embodiment of this invention, a transmission tube is fixedly connected to the top of the piston, and a limiting tube sleeved on the surface of the transmission tube is fixedly connected to the top of the tank body. The limiting tube and the transmission tube are slidably connected.

[0011] As a preferred embodiment of this utility model, the transmission structure includes a connecting frame fixedly connected to the surface of the transmission tube. The connecting frame is located at the top of the limiting tube. An extension plate is fixedly connected to the surface of the connecting frame. The side of the extension plate away from the connecting frame extends to the outside of the valve stem. A slide rod located inside the valve stem is fixedly connected to the side of the extension plate near the valve stem. The slide rod is slidably connected to the valve stem.

[0012] As a preferred embodiment of this utility model, a limiting plate is fixedly connected to the top of the transmission tube, and a guide rod is fixedly connected to the top of the tank. The side of the guide rod away from the tank passes through the limiting plate and is slidably connected to the limiting plate.

[0013] As a preferred embodiment of this invention, a sealing ring is fixedly connected to the top of the piston, and the outer surface of the sealing ring is in contact with the inner wall of the tank.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting a normally closed second air supply valve and cooperating with an internal purely mechanical pressure sensing structure, realizes direct monitoring and response to pressure changes inside the tank, eliminating the dependence on electronic pressure sensors that require external power, and fundamentally solving the problem of sensor failure caused by power interruption, instability or depletion.

[0016] 2. This utility model ensures that the air pressure can be effectively applied to the inner wall of the tank by the close contact between the piston and the inner wall of the tank. The force of the decrease in air pressure inside the tank is used as the driving force to pull the piston downward, thus converting the pressure difference into mechanical displacement.

[0017] 3. This utility model transmits motion to the outside of the tank through the transmission tube, which significantly improves the stability and accuracy of the piston and transmission tube movement. The limiting tube ensures the straightness and consistency of the motion trajectory, so that the displacement sensed by the pressure can be accurately transmitted to the subsequent transmission structure, reducing energy loss and the possibility of malfunction.

[0018] 4. This utility model uses an extension plate as a lever arm to transmit motion from the connection point to the valve stem position at the far end, realizing an efficient, reliable and spatially adaptable force transmission method. The extension plate extends the lever arm, which is convenient for amplifying motion or adapting to different installation positions. The internal sliding design of the slide rod and valve stem ensures that the valve stem can be directly driven to open the valve.

[0019] 5. By setting a guide rod, this utility model adds a second guide point to the top of the transmission tube. Combined with the constraints of the bottom piston and the middle limiting tube, it significantly improves the rigidity and bending resistance of the entire transmission mechanism, preventing twisting or deviation from the axis when subjected to lateral forces or vibrations.

[0020] 6. This utility model adds a sealing ring to the top of the piston, which is in close contact with the inner wall of the tank, to achieve secondary sealing on the piston's movement path. This not only more effectively prevents gas from leaking from the gap between the top of the piston and the tank wall, but also ensures that the pressure difference can act more fully on the piston, thus improving the system's pressure sensitivity and efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 3 This is a schematic cross-sectional view of the present invention.

[0024] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Tank body; 2. First air supply valve; 3. Air supply valve; 4. Second air supply valve; 5. Valve stem; 6. Piston; 7. Transmission structure; 8. Transmission pipe; 9. Limiting pipe; 10. Connecting frame; 11. Extension plate; 12. Slide rod; 13. Limiting plate; 14. Guide rod; 15. Sealing ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 4 As shown, the present invention provides a buffer tank for a laser processing system, comprising a tank body 1;

[0028] The left side of the tank body 1 is connected to a first air replenishment valve 2, and the right side of the tank body 1 is connected to an air supply valve 3. Both the first air replenishment valve 2 and the air supply valve 3 are normally open. The left side of the tank body 1 is connected to a second air replenishment valve 4 located at the top of the first air replenishment valve 2. The second air replenishment valve 4 is normally closed. The valve core of the second air replenishment valve 4 is connected to a valve stem 5. The valve stem 5 can control the second air replenishment valve 4 to replenish air pressure into the tank body 1. The tank body 1 is equipped with a pressure sensing structure. The pressure sensing structure can sense the air pressure inside the tank body 1 and control the second air replenishment valve 4 to open.

[0029] refer to Figure 3 The pressure sensing structure includes a piston 6 installed inside the tank 1. The outer surface of the piston 6 is in contact with the inner wall of the tank 1. When the pressure inside the tank 1 drops, the tank 1 can use air pressure to pull the piston 6 downward. A transmission structure 7 is installed at the top of the tank 1. The transmission structure 7 can control the second air supply valve 4 to open when the piston 6 descends.

[0030] As a technical optimization of this utility model, the close contact between the piston 6 and the inner wall of the tank 1 ensures that the air pressure can be effectively applied to it. The force of the decrease in air pressure inside the tank is used as the driving force to pull the piston 6 downward, thus converting the pressure difference into mechanical displacement.

[0031] refer to Figure 3 The piston 6 is fixedly connected to the top of the transmission pipe 8, and the tank body 1 is fixedly connected to the top of the tank body 1. The limiting pipe 9 is sleeved on the surface of the transmission pipe 8, and the limiting pipe 9 and the transmission pipe 8 are slidably connected.

[0032] As a technical optimization of this utility model, the motion is transmitted to the outside of the tank 1 through the transmission pipe 8, which significantly improves the stability and accuracy of the movement of the piston 6 and the transmission pipe 8. The limiting pipe 9 ensures the straightness and consistency of the motion trajectory, so that the displacement sensed by the pressure can be accurately transmitted to the subsequent transmission structure 7, reducing energy loss and the possibility of malfunction.

[0033] refer to Figure 4The transmission structure 7 includes a connecting frame 10 fixedly connected to the surface of the transmission tube 8. The connecting frame 10 is located at the top of the limiting tube 9. An extension plate 11 is fixedly connected to the surface of the connecting frame 10. The side of the extension plate 11 away from the connecting frame 10 extends to the outside of the valve stem 5. A slide rod 12 located inside the valve stem 5 is fixedly connected to the side of the extension plate 11 close to the valve stem 5. The slide rod 12 is slidably connected to the valve stem 5.

[0034] As a technical optimization of this utility model, the extension plate 11 acts as a lever arm to transmit the motion from the connection point to the valve stem 5 at the far end, realizing an efficient, reliable and spatially adaptable force transmission method. The extension plate 11 extends the lever arm, which is convenient for amplifying the motion or adapting to different installation positions. The internal sliding design of the slide rod 12 and the valve stem 5 ensures that the valve stem 5 can be directly driven to open the valve.

[0035] refer to Figure 3 A limiting plate 13 is fixedly connected to the top of the transmission pipe 8, and a guide rod 14 is fixedly connected to the top of the tank body 1. The side of the guide rod 14 away from the tank body 1 passes through the limiting plate 13 and is slidably connected to the limiting plate 13.

[0036] As a technical optimization of this utility model, by setting the guide rod 14, a second guide point is added to the top of the transmission tube 8. Combined with the constraint of the bottom piston 6 and the middle limiting tube 9, the rigidity and bending resistance of the entire transmission mechanism are significantly improved, preventing twisting or deviation from the axis when subjected to lateral force or vibration.

[0037] refer to Figure 3 A sealing ring 15 is fixedly connected to the top of the piston 6, and the outer surface of the sealing ring 15 is in contact with the inner wall of the tank 1.

[0038] As a technical optimization of this utility model, a sealing ring 15 is added to the top of the piston 6. The sealing ring 15 is in close contact with the inner wall of the tank 1, which realizes secondary sealing on the movement path of the piston 6. This can not only more effectively prevent gas from leaking from the gap between the top of the piston 6 and the tank wall, but also ensure that the pressure difference can be more fully applied to the piston 6, thereby improving the pressure sensitivity and efficiency of the system.

[0039] The working principle and usage process of this utility model: The first gas replenishment valve 2 and the gas supply valve 3 are continuously open, allowing gas to flow between the gas supply source, the tank 1, and the laser processing system. The second gas replenishment valve 4 remains closed. Its internal valve stem 5 is connected to a mechanism that controls the opening and closing of the valve core. The tank 1 contains a core pressure sensing structure, a piston 6 that is in close contact with the inner wall of the tank 1. When the gas pressure inside the tank 1 decreases due to the consumption of the laser processing system, this pressure drop generates a force that acts on the piston 6, pulling the piston 6 downward along the inner wall of the tank 1. A transmission tube 8 is fixedly connected to the top of the piston 6. When the piston 6 moves downward, the transmission tube 8 also moves downward. The transmission tube 8 passes through the top of the tank 1 and extends to the outside. The portion of tank 1 extending to the outside of the top is fixedly equipped with a transmission structure 7. The transmission structure 7 includes a connecting frame 10 and an extension plate 11. The extension plate 11 extends to the valve stem 5 area of ​​the second air replenishment valve 4, and a slide rod 12 is fixed on the side near the valve stem 5. The slide rod 12 is inserted into the valve stem 5 and slidably connected to it. When the piston 6 moves the transmission tube 8 downward due to the decrease in pressure inside the tank, the connecting frame 10, the extension plate 11 and the slide rod 12 also move downward together. Since the slide rod 12 is inserted into the valve stem 5, the downward movement of the slide rod 12 causes the valve stem 5 to move accordingly. The movement of the valve stem 5 controls the valve core of the second air replenishment valve 4 to move, thereby opening the second air replenishment valve 4. After the second air replenishment valve 4 is opened, external gas begins to enter the tank 1 through the valve. As gas is replenished, the gas pressure inside the tank 1 begins to rise. When the gas pressure rises to a certain level, the force exerted by the gas pressure on the bottom of the piston 6 increases, pushing the piston 6 together with the transmission pipe 8 to overcome gravity and possible resistance and move upward to reset. The reset action is transmitted through the transmission structure 7, causing the extension plate 11 and the slide rod 12 to drive the valve stem 5 to move in the closing direction, ultimately restoring the second gas replenishment valve 4 to the normally closed state.

[0040] In summary, this buffer tank for laser processing systems, through its normally closed second gas supply valve 4 and internal purely mechanical pressure sensing structure, achieves direct monitoring and response to pressure changes within the tank. This eliminates the reliance on electronic pressure sensors that require external power, fundamentally solving the problem of sensor failure caused by power interruption, instability, or depletion.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A buffer tank for a laser processing system, comprising a tank body (1); Its features are: The left side of the tank (1) is connected to a first air replenishment valve (2), and the right side of the tank (1) is connected to an air supply valve (3). Both the first air replenishment valve (2) and the air supply valve (3) are normally open. The left side of the tank (1) is connected to a second air replenishment valve (4) located at the top of the first air replenishment valve (2). The second air replenishment valve (4) is normally closed. A valve stem (5) is connected to the valve core of the second air replenishment valve (4). The valve stem (5) can control the second air replenishment valve (4) to replenish air pressure into the tank (1). The tank (1) is equipped with a pressure sensing structure. The pressure sensing structure can sense the air pressure inside the tank (1) and control the second air replenishment valve (4) to open.

2. A buffer tank for a laser processing system according to claim 1, characterized in that: The pressure sensing structure includes a piston (6) disposed inside the tank (1). The outer surface of the piston (6) is in contact with the inner wall of the tank (1). When the pressure inside the tank (1) drops, the tank (1) can use air pressure to pull the piston (6) downward. A transmission structure (7) is provided on the top of the tank (1). The transmission structure (7) can control the second air supply valve (4) to open when the piston (6) descends.

3. A buffer tank for a laser processing system according to claim 2, characterized in that: The piston (6) is fixedly connected to the top of a transmission tube (8), and the tank (1) is fixedly connected to the top of a limiting tube (9) sleeved on the surface of the transmission tube (8). The limiting tube (9) and the transmission tube (8) are slidably connected.

4. A buffer tank for a laser processing system according to claim 3, characterized in that: The transmission structure (7) includes a connecting frame (10) fixedly connected to the surface of the transmission tube (8). The connecting frame (10) is located at the top of the limiting tube (9). An extension plate (11) is fixedly connected to the surface of the connecting frame (10). The side of the extension plate (11) away from the connecting frame (10) extends to the outside of the valve stem (5). A slide rod (12) located inside the valve stem (5) is fixedly connected to the side of the extension plate (11) near the valve stem (5). The slide rod (12) is slidably connected to the valve stem (5).

5. A buffer tank for a laser processing system according to claim 3, characterized in that: The top of the transmission pipe (8) is fixedly connected to a limiting plate (13), and the top of the tank (1) is fixedly connected to a guide rod (14). The guide rod (14) passes through the limiting plate (13) on the side away from the tank (1) and is slidably connected to the limiting plate (13).

6. A buffer tank for a laser processing system according to claim 2, characterized in that: A sealing ring (15) is fixedly connected to the top of the piston (6), and the outer surface of the sealing ring (15) is in contact with the inner wall of the tank (1).

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