Energy storage tube leak detection device

Abstract

The utility model relates to energy storage pipe sealing detection technical field, and disclose energy storage pipe leakproofness detection device, including work table, the upper surface fixedly connected with sealed box of work table, the work table upper surface and located sealed box in fixedly connected with box seat, the box seat is integrative and has two protrusions on, two protrusions are respectively threaded with end pipe no.

Description

Technical Field

[0001] This utility model relates to the field of energy storage tube sealing detection technology, and more specifically to an energy storage tube sealing detection device. Background Technology

[0002] Energy storage tubes, such as various lithium battery cell casings and small hydrogen storage metal tanks, are the core pressure-bearing components of energy storage units. Their sealing performance is a key technical indicator to ensure product safety, prevent media leakage, and ensure service life. Therefore, sealing testing of energy storage tubes is an essential process during the manufacturing process.

[0003] Currently, the industry commonly uses the pressure decay method to test the sealing performance of such tubular workpieces. The basic principle of this method is to fill the workpiece with gas at a certain pressure, and after a period of pressure holding, use a high-precision sensor to monitor the decrease in internal pressure to determine whether there is a leak.

[0004] However, at the device level that implements this detection principle, many existing detection devices have obvious structural problems. The detection bench often separates the various functional modules such as the gas source interface, the inflation clamp, the pressure sensor, and the display instrument, and connects them through long pipelines. This makes it impossible to form a relatively independent cavity pressure, and it is easy to be directly interfered with by the fluctuation of the gas source, which will affect the accuracy of the detection results. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an energy storage tube sealing test device to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: an energy storage pipe sealing test device, including a workbench, a sealed box fixedly connected to the upper surface of the workbench, a box base fixedly connected to the upper surface of the workbench and inside the sealed box, two protrusions integrally formed on the box base, an end tube one and an end tube two respectively passing through the two protrusions, and the end tube one being slidably connected to the protrusion, clamps fixedly connected to the outer circumference of the proximal ends of the end tube one and the end tube two, a flexible tube inserted into one side of the end tube one, an air inlet pipe one at the free end of the flexible tube, the other end of the air inlet pipe one passing through the sealed box and connected to an external air pump, a pressure detection box fixedly connected to the upper surface of the workbench and one side of the box base, the other end of the end tube two extending into the pressure detection box, and a pressure gauge for use with the pressure detection box fixedly connected to the pressure detection box.

[0007] As a further embodiment of this utility model, the box base is provided with a sealed box with a bottom opening. The bottom of the sealed box has two notches to avoid the protrusion. Three air inlet pipes are provided on one side of the sealed box. The ends of the three air inlet pipes inside the sealed box are also fixedly connected to hoses by clamps. The free ends of these hoses extend into the sealed box. The three air inlet pipes respectively introduce room temperature air, cold air and hot air. The top of the sealed box is provided with a lifting assembly to raise and lower the sealed box.

[0008] As a further embodiment of this utility model, the lifting assembly includes a cylinder fixedly connected to the outer wall of the top of the sealed box, and the bottom end of the cylinder piston rod passes through the sealed box and is fixed to the outer wall of the top of the sealed box.

[0009] As a further embodiment of this utility model, an exhaust pipe is provided on the top of the sealed box, and a flexible hose is also fixedly connected to the bottom end of the exhaust pipe by a clamp, and the free end of the flexible hose is also inserted into the sealed box.

[0010] As a further embodiment of this utility model, a ball screw linear module is fixedly connected to the upper surface of the workbench and to the other side of the box seat. A connecting frame is fixedly connected to the slide of the ball screw linear module. The connecting frame is fixed to the outer circumferential wall of the end tube and is used to allow the end tube to slide along the protrusion.

[0011] As a further embodiment of this utility model, the upper surface of the box base and the protrusion are provided with a U-shaped groove, and the U-shaped groove matches the bottom wall thickness of the sealed box.

[0012] As a further embodiment of this invention, sealing gaskets are adhered to the opposite sides of both clamps.

[0013] As a further embodiment of this utility model, guide rods are fixedly connected to the four corners of the top outer wall of the sealed box, and the top ends of multiple guide rods pass through the sealed box and are slidably connected to the sealed box.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model separates the pressure detection box from the inflation pipeline through end pipe one and end pipe two, so that the pressure gauge can stably monitor the pressure of a relatively independent cavity, reducing direct interference caused by fluctuations in the gas source.

[0016] 2. This utility model constructs a controllable local temperature control environment by setting up a liftable sealed box and two air inlet pipes for respectively introducing room temperature, cold, and hot air. It can simulate the high and low temperature conditions that energy storage tubes may encounter in actual applications, and conduct temperature stress tests on them, which greatly improves the comprehensiveness of the test and the reliability of the results.

[0017] 3. This utility model ensures the sealing of the workpiece port by setting a sealing gasket on the clamping plate. Combined with the fitting design of the bottom of the sealed box and the loop-shaped groove on the box base, an effective seal is formed to prevent the leakage of temperature control gas and ensure the effectiveness of environmental simulation. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a structural diagram of the internal structure of the sealed box of this utility model.

[0020] Figure 3 This utility model Figure 2 A partially enlarged structural diagram.

[0021] Figure 4 This is a structural diagram of the box base of this utility model.

[0022] The attached diagram is labeled as follows: 1. Workbench; 2. Sealed box; 3. Inlet pipe one; 4. End pipe one; 5. Clamping plate; 6. Cylinder; 7. Sealed box; 8. Inlet pipe two; 9. Notch; 10. Hose; 11. Exhaust pipe; 12. Box base; 13. End pipe two; 14. Pressure detection box; 15. Ball screw linear module; 16. Connecting frame; 17. U-shaped groove; 18. Protrusion; 19. Pressure gauge. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Reference Figures 1-4This utility model provides a device for testing the sealing performance of energy storage pipes, including a workbench 1. A sealed box 2 is bolted to the upper surface of the workbench 1. A box base 12 is bolted to the upper surface of the workbench 1 and located inside the sealed box 2. Two protrusions 18 are integrally formed on the box base 12. An end tube 4 and an end tube 13 are respectively inserted through the two protrusions 18, and the end tube 4 is slidably connected to the protrusion 18. Clamping discs 5 are bolted to the outer circumference of the adjacent ends of the end tubes 4 and 13. Sealing gaskets are bonded to both sides. A flexible hose 10 is inserted into one side of end tube 4. An air inlet pipe 3 is provided at the free end of the flexible hose 10. The other end of the air inlet pipe 3 passes through the sealed box 2 and is connected to an external air pump. A pressure detection box 14 is fixedly connected to the upper surface of the workbench 1 and to one side of the box base 12 by bolts. The other end of end tube 13 extends into the pressure detection box 14. A pressure gauge 19 (model Y-150) is fixedly connected to the pressure detection box 14 by bolts.

[0025] An external air pump injects a certain pressure of detection gas into the clamped energy storage workpiece through the air inlet pipe 3 and the hose 10, and through the end pipe 4. After the inflation is completed, the air circuit is closed and the circuit enters the pressure holding state. The gas pressure is transmitted to the pressure detection box 14 through the end pipe 2. The pressure gauge 19 monitors and displays the pressure value in the pressure detection box 14 in real time. The operator or the connected central control system will record the initial pressure and observe whether the pressure changes after a preset pressure holding time. If the pressure drop exceeds the allowable range during the pressure holding period at room temperature, it can be preliminarily determined that the workpiece is not sealed properly.

[0026] By separating the pressure detection box 14 from the inflation line through end pipe 4 and end pipe 13, the pressure gauge 19 can stably monitor the pressure of a relatively independent cavity, reducing direct interference caused by fluctuations in the gas source.

[0027] A ball screw linear module 15 is bolted to the upper surface of the workbench 1 and to the other side of the box base 12. A connecting frame 16 is bolted to the slide of the ball screw linear module 15. The connecting frame 16 is fixed to the outer circumference of the end tube 4 and is used to make the end tube 4 slide along the protrusion 18.

[0028] It should be noted that the ball screw linear module 15 achieves precise linear motion through the coordinated operation of various components: the slide table is the moving component, the ball screw and guide rail constitute the transmission core, the motor and coupling provide power, and the aluminum alloy profile and support base ensure structural stability. Furthermore, by cooperating with magnetic switches, proximity switches, or photoelectric switches, the displacement of the slide table can be precisely controlled. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0029] Before testing, the energy storage tube workpiece to be tested is placed between two clamping plates 5. The ball screw linear module 15 is started, and the connecting frame 16 drives the end tube 4 to slide along the protrusion 18 on the box seat 12 towards the end tube 13 until both ends of the energy storage tube workpiece are clamped. The sealing gasket on the clamping plate 5 ensures that a reliable airtight seal is formed between the tube openings at both ends of the workpiece and the clamping plate 5. At this time, the cavity inside the workpiece is connected to the channel of the end tube 4 and the end tube 13.

[0030] To change the temperature of the detection environment, this utility model adopts a sealed box 7 with a bottom opening on the box base 12. The bottom of the sealed box 7 has two notches 9 to avoid the protrusion 18. Three air inlet pipes 8 are installed on one side of the sealed box 2. The ends of the three air inlet pipes 8 inside the sealed box 2 are also fixedly connected to hoses 10 by clamps. The free ends of these hoses 10 all extend into the sealed box 7. The three air inlet pipes 8 respectively introduce room temperature air, cold air and hot air. The top of the sealed box 2 is provided with a lifting component to raise and lower the sealed box 7.

[0031] When simulation of changes is required, a specific gas is introduced into one of the three air inlet pipes 8 according to the test requirements. Normal temperature air is introduced as a benchmark for comparison. Cold air is introduced to simulate a low-temperature working environment to test the leakage that may be caused by material contraction. Hot air is introduced to simulate a high-temperature working environment to test the sealing performance under the conditions of material thermal expansion and internal pressure increase. The introduced ambient gas flows in the sealed box 7 to heat or cool the workpiece. The gas in the chamber can be discharged through the hose 10 connected to the exhaust pipe 11 to achieve gas circulation and pressure balance in the chamber, ensuring uniform and stable temperature.

[0032] By setting up a liftable sealed box 7 and air inlet pipes 8 that allow for the introduction of ambient temperature, cold, and hot air respectively, a controllable local temperature control environment is constructed. This environment can simulate the high and low temperature conditions that energy storage tubes may encounter in actual applications, and perform temperature stress tests on them, greatly improving the comprehensiveness of the test and the reliability of the results.

[0033] Furthermore, the lifting assembly includes a cylinder 6 that is bolted to the top outer wall of the sealed box 2. The bottom end of the piston rod of the cylinder 6 passes through the sealed box 2 and is fixed to the top outer wall of the sealed box 7. Guide rods are bolted to the four corners of the top outer wall of the sealed box 7, and the top ends of multiple guide rods pass through the sealed box 2 and are slidably connected to the sealed box 2.

[0034] It should be noted that: Cylinder 9 is a power actuator that converts the pressure energy of compressed air into mechanical energy. By controlling the gas in and out, it drives the piston to perform linear reciprocating motion. It can be used in conjunction with a magnetic switch, proximity switch or photoelectric switch to achieve precise control of the extension and retraction displacement of the piston rod of cylinder 9. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0035] Furthermore, an exhaust pipe 11 is installed on the top of the sealed box 2, and a flexible hose 10 is fixedly connected to the bottom of the exhaust pipe 11 by a clamp, and the free end of the flexible hose 10 is also inserted into the sealed box 7.

[0036] Furthermore, a U-shaped groove 17 is provided on the upper surface of the box base 12 and the protrusion 18, and the U-shaped groove 17 matches the bottom wall thickness of the sealed box 7.

[0037] The sealing gasket on the clamping plate 5 ensures the sealing of the workpiece port. Combined with the fitting design of the bottom of the sealed box 7 and the loop-shaped groove 17 on the box seat 12, an effective seal is formed to prevent the leakage of temperature control gas and ensure the effectiveness of environmental simulation.

[0038] During environmental simulation or after reaching the set temperature, the pressure monitoring process is repeated. Since temperature changes affect the pressure of the gas inside the workpiece, it is necessary to determine whether the pressure change is caused by temperature changes or by a real leak.

[0039] The use of this utility model involves the following steps:

[0040] S1: First, place the energy storage tube workpiece to be tested between the two clamps 5, start the ball screw linear module 15, drive the connecting frame 16 to move the end tube 4 along the protrusion 18 on the box seat 12 towards the end tube 13, until the two ends of the energy storage tube workpiece are clamped. The sealing gasket on the clamp 5 ensures that a reliable airtight seal is formed between the tube openings at both ends of the workpiece and the clamp 5. At this time, the cavity inside the workpiece is connected to the channel of the end tube 4 and the end tube 13.

[0041] S2: An external air pump injects a certain pressure of detection gas into the clamped energy storage workpiece through the air inlet pipe 3 and the hose 10, and through the end pipe 4. After the inflation is completed, the air circuit is closed and the circuit enters the pressure holding state. The gas pressure is transmitted to the pressure detection box 14 through the end pipe 2 13. The pressure gauge 19 monitors and displays the pressure value in the pressure detection box 14 in real time. The operator or the connected central control system will record the initial pressure and observe whether the pressure changes after a preset pressure holding time. If the pressure drop exceeds the allowable range during the pressure holding period at room temperature, it can be preliminarily determined that the workpiece is not sealed properly.

[0042] S3: When it is necessary to simulate changes, according to the test requirements, select one of the three air inlet pipes 8 to introduce a specific gas. Introduce room temperature air as a benchmark comparison, introduce cold air to simulate a low temperature working environment and check the leakage that may be caused by material contraction, and introduce hot air to simulate a high temperature working environment and check the sealing performance under the conditions of material thermal expansion and internal pressure increase. The introduced ambient gas flows in the sealed box 7 to heat or cool the workpiece. The gas in the chamber can be discharged through the hose 10 connected to the exhaust pipe 11 to achieve gas circulation and pressure balance in the chamber and ensure uniform and stable temperature.

[0043] S4: During the environmental simulation process or after the set temperature is reached, repeat the pressure monitoring process. Since temperature changes will affect the pressure of the gas inside the workpiece, determine whether the pressure change is caused by temperature changes or by a real leak.

[0044] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0045] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0046] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. An energy storage pipe sealing performance testing device, comprising a workbench (1), characterized in that: A sealed box (2) is fixedly connected to the upper surface of the workbench (1). A box base (12) is fixedly connected to the upper surface of the workbench (1) and inside the sealed box (2). Two protrusions (18) are integrally formed on the box base (12). End tube one (4) and end tube two (13) are respectively inserted through the two protrusions (18). End tube one (4) is slidably connected to the protrusion (18). Clamping plates (5) are fixedly connected to the outer circumference of the near ends of end tube one (4) and end tube two (13). A flexible tube (10) is inserted into one side of (4). An air inlet pipe (3) is provided at the free end of the flexible tube (10). The other end of the air inlet pipe (3) passes through the sealed box (2) and is connected to an external air pump. A pressure detection box (14) is fixedly connected to the upper surface of the workbench (1) and to one side of the box base (12). The other end of the end tube (13) extends into the pressure detection box (14). A pressure gauge (19) for use with the pressure detection box (14) is fixedly connected to the pressure detection box (14).

2. The energy storage tube sealing test device according to claim 1, characterized in that: The box base (12) is provided with a sealed box (7) with an open bottom. The sealed box (7) has two notches (9) at the bottom to avoid the protrusion (18). Three air inlet pipes (8) are provided on one side of the sealed box (2). The end of the three air inlet pipes (8) inside the sealed box (2) is also fixedly connected to a hose (10) by a clamp. The free ends of the hoses (10) extend into the sealed box (7). The three air inlet pipes (8) are respectively connected to room temperature air, cold air and hot air. The top of the sealed box (2) is provided with a lifting assembly to raise and lower the sealed box (7).

3. The energy storage tube sealing performance testing device according to claim 2, characterized in that: The lifting assembly includes a cylinder (6) fixedly connected to the top outer wall of the sealed box (2), and the bottom end of the piston rod of the cylinder (6) passes through the sealed box (2) and is fixed to the top outer wall of the sealed box (7).

4. The energy storage tube sealing test device according to claim 2, characterized in that: The top of the sealed box (2) is provided with an exhaust pipe (11), and the bottom end of the exhaust pipe (11) is also fixedly connected with a hose (10) by a clamp, and the free end of the hose (10) is also inserted into the sealed box (7).

5. The energy storage tube sealing test device according to claim 1, characterized in that: A ball screw linear module (15) is fixedly connected to the upper surface of the workbench (1) and to the other side of the box base (12). A connecting frame (16) is fixedly connected to the slide of the ball screw linear module (15). The connecting frame (16) is fixed to the outer circumference of the end tube (4) and is used to make the end tube (4) slide along the protrusion (18).

6. The energy storage tube sealing test device according to claim 5, characterized in that: The upper surface of the box base (12) and the protrusion (18) are provided with a U-shaped slot (17), and the U-shaped slot (17) matches the bottom wall thickness of the sealed box (7).

7. The energy storage tube sealing test device according to claim 1, characterized in that: Both of the clamps (5) have sealing gaskets bonded to their opposite sides.

8. The energy storage tube sealing test device according to claim 2, characterized in that: Guide rods are fixedly connected to the four corners of the top outer wall of the sealed box (7), and the top ends of multiple guide rods pass through the sealed box (2) and are slidably connected to the sealed box (2).

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