A flat weld leak detection vacuum box with wheels

Abstract

The present invention discloses a wheeled flat weld leak detection vacuum box, which relates to the technical field of vacuum detection boxes. The box comprises a box body, a sealing sponge, an acrylic observation window, a wheel frame, an elastic adjustment mechanism, casters, a lighting mechanism, an air intake valve, and an air extraction valve. The box body has a hollow structure with upper and lower parts, the sealing sponge is arranged at the bottom of the box body, the acrylic observation window is sealed and installed at the top of the box body, the wheel frame is arranged on both sides of the box body, and the wheel frame is in an inverted mountain shape. The wheel frame is provided with two cylindrical support rods, the bottom of the cylindrical support rods is not lower than the bottom of the box body, the elastic adjustment mechanism is arranged on the cylindrical support rods, the casters are arranged on the elastic adjustment mechanism, the lighting mechanism is arranged on the side wall of the top of the box body, the air intake valve is arranged at the top of the box body, and the air extraction valve is arranged on one side of the box body. The air intake valve and the air extraction valve are both connected to the box body. The present invention has a simple structure and is easy to operate, which can effectively reduce the labor intensity of detection personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum detection boxes, and in particular relates to a flat plate weld leakage detection vacuum box with wheels. Background Art

[0002] A common method for leak detection is vacuum chambers, such as those used to detect leaks in oil tank floor welds and pressure vessel welds. The dimensions of vacuum chambers currently on the market are approximately 200 mm wide, 600 mm long, and 300 mm high, with weights ranging from 5 kg to 10 kg. To use a vacuum chamber, the chamber is positioned at the location to be tested. The inspector squats and applies a certain amount of pressure to ensure a seal between the chamber's edges and the object being tested. A vacuum pump then evacuates the chamber. Once the vacuum reaches the specified negative pressure, the inspector can check for leaks through the chamber's transparent window. After testing is complete, the air inlet valve is opened to fill the chamber with air. Once the negative pressure reaches zero, the inspector can move the chamber to the next testing location, repeating the cycle.

[0003] Since the vacuum box has a certain weight, if the number of welds to be inspected is large, such as welds several kilometers long, the inspectors will have to perform repeated squatting and standing movements thousands of times. Moving the vacuum box for a long time will also consume a lot of physical strength. Since the inspection of one position requires the inspectors to perform repeated movements of squatting, applying pressure, standing up, and moving, a lot of time will be wasted and the efficiency is very low. In addition, if the seal is not tight, the inspectors will have to spend a lot of effort, even kneeling to apply pressure to the vacuum box. Sometimes they have to use old clothes or old cloths dipped in water to block the perimeter of the box to ensure the seal, which is also time-consuming and labor-intensive.

[0004] Therefore, how to provide a flat weld leak detection vacuum box with wheels that is convenient for inspectors to operate and avoids moving has become a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a flat plate weld leak detection vacuum box with wheels, which avoids the bending operation during the transportation and detection of the box body and reduces the labor intensity of the detection personnel.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a flat weld leak detection vacuum box with wheels, comprising a box body, a sealing sponge, an acrylic observation window, a wheel frame, an elastic adjustment mechanism, casters, a lighting mechanism, an air intake valve and an air exhaust valve, the box body is a hollow structure with upper and lower parts, the sealing sponge is arranged at the bottom end of the box body, the acrylic observation window is sealed and installed at the top end of the box body, the wheel frame is arranged on both sides of the box body, the wheel frame is in an inverted mountain shape, the wheel frame is provided with two cylindrical support rods, the bottom of the cylindrical support rod is not lower than the bottom end of the box body, the elastic adjustment mechanism is arranged on the cylindrical support rod, the casters are arranged on the elastic adjustment mechanism, the lighting mechanism is arranged on the side wall of the top of the box body, the air intake valve is arranged at the top end of the box body, the air exhaust valve is arranged on one side of the box body, and the air intake valve and the air exhaust valve are both connected to the box body.

[0007] Furthermore, it also includes a vacuum gauge and a safety valve. The vacuum gauge is arranged at the top of the box and is connected to the box through a pipeline. The safety valve is arranged on the pipeline between the vacuum gauge and the box.

[0008] Furthermore, the elastic adjustment mechanism includes a spring, a beam and an axle, the spring is arranged on the cylindrical support rod, and beam sliders are provided at both ends of the beam. The beam sliders are inserted into the cylindrical support rod from the bottom of the cylindrical support rod and conflict with the spring, the axle is arranged at the center of the beam, the caster is arranged on the axle, and the caster is rotatably connected to the axle.

[0009] Furthermore, it also includes a linear guide rail and a slide, the linear guide rail is arranged in the middle position of the wheel frame, the slide is slidably arranged on the linear guide rail, and the crossbeam is fixedly connected to the slide.

[0010] Furthermore, it also includes a positioning block, which is fixed to the bottom end of the cylindrical support rod by a top screw and is used to limit the crossbeam slider to prevent the crossbeam slider from detaching from the cylindrical support rod and adjust the lifting height of the box body.

[0011] Furthermore, it also includes a spring force adjustment nut, the top of the cylindrical support rod is provided with a thread, the spring force adjustment nut is threadedly connected to the cylindrical support rod, and the spring force adjustment nut is in contact with the spring to adjust the elastic force of the spring.

[0012] Furthermore, it also includes a foot pedal, which is arranged at the top of the box body and above the acrylic observation window.

[0013] Furthermore, it also includes an armrest, which is longitudinally arranged above the box body, and both ends of the armrest are fixed to the box body.

[0014] Furthermore, the lighting mechanism is an LED lighting lamp.

[0015] Furthermore, it also includes a power supply mechanism, which includes a battery compartment and a lithium battery. The battery compartment is arranged on the outer wall of the box body, the lithium battery is arranged in the battery compartment, and the LED lighting lamp is electrically connected to the lithium battery.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides casters at the bottom of the box body, which can push the vacuum box to move, without bending over to lift or put it down, and the operation is convenient and quick;

[0018] 2. The present invention has the inspector stand on the vacuum box, and relies on the inspector's own gravity to deform the sealing sponge to achieve the purpose of sealing. The device has a simple structure and is easy to arrange, with fast sealing speed and high efficiency.

[0019] 3. The inspector of the present invention can complete the inspection work in an upright posture, which reduces the labor intensity of the inspector, especially the labor intensity of the waist. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the vacuum box in the free state of the present invention;

[0021] Figure 2 Schematic diagram of the vacuum box in the vacuum state of the present invention;

[0022] Figure 3 This is a top view of the vacuum box of the present invention.

[0023] In the figure: 1-battery compartment; 2-lithium battery; 3-cylindrical support rod; 4-spring; 5-crossbeam; 6-axle; 7-castor; 8-slide; 9-crossbeam slider; 10-linear guide; 11-wheel frame; 12-spring force adjustment nut; 13-LED lighting; 14-handrail; 15-box; 16-sealing sponge; 17-tested board; 18-vacuum gauge; 19-safety valve; 20-positioning block; 21-exhaust valve; 22-intake valve; 23-acrylic observation window; 24-foot pedal. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", "one side", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" 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, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1

[0027] like Figure 1-3 As shown, this embodiment provides a flat weld leak detection vacuum box with wheels, including a box body 15, a battery compartment 1, a lithium battery 2, an LED lighting lamp 13, a sealing sponge 16, an acrylic observation window 23, a wheel frame 11, casters 7, an air intake valve 22, an air exhaust valve 21, a vacuum gauge 18, a safety valve 19, a foot pedal 24 and an armrest 14.

[0028] The box 15 has a hollow structure with a battery compartment 1 on one side, which contains a lithium battery 2. An LED light 13 is installed horizontally on the inner sidewall of the box 15 and is electrically connected to the lithium battery 2. The LED light 13 provides excellent lighting for weld inspection. The top of the box 15 is equipped with an acrylic observation window 23, a foot pedal 24, and a handrail 14. The acrylic observation window 23 is sealed on the top of the box 15. The foot pedal 24 is located above the acrylic observation window and is used by the inspector to apply pressure to the box 15. The handrail 14 is fixed longitudinally above the box 15 and is used by the inspector to hold the box 15 while pushing it forward. A sealing sponge 16 is bonded to the bottom of the box 15 and is approximately 40 mm high. Its function is to ensure that the box 15 maintains a good seal with the contact surface when encountering uneven inspection surfaces.

[0029] A vacuum gauge 18 is arranged at the top of the box body 15 and is connected to the box body 15 through a pipeline. A safety valve 19 is arranged on the pipeline between the vacuum gauge 18 and the box body 15. An air intake valve 22 is arranged on the handrail 14 above the box body 15. An air exhaust valve 21 is arranged on one side of the box body 15. Both the air intake valve 22 and the air exhaust valve 21 are connected to the box body 15.

[0030] The wheel frame 11 is fixed to both sides of the box 15. In this embodiment, there are four wheel frames 11, symmetrically arranged at the front and rear ends of the box 15. The wheel frame 11 is in an inverted mountain shape. Two cylindrical support rods 3 are set at both ends of the wheel frame 11. A linear guide 10 is set in the middle position of the wheel frame 11. A slide 8 is slidably mounted on the linear guide 10. The bottom of the cylindrical support rod 3 is not lower than the bottom of the box 15. An elastic adjustment mechanism is set on the cylindrical support rod 3. The elastic adjustment mechanism includes two springs 4, a crossbeam 5 and an axle 6. The spring 4 slides on the cylindrical support rod 3. The two ends of the crossbeam 5 are provided with crossbeam sliders 9. The crossbeam sliders 9 are inserted into the cylindrical support rod 3 from the bottom and conflict with the spring 4. The crossbeam 5 is fixedly connected to the slide 8. The axle 6 is fixed to the center of the crossbeam 5. The caster 7 is mounted on the wheel axle 6 and is rotatably connected to the wheel axle 6. The setting of the linear guide rail 10 and the slide 8 has a good limiting effect on the crossbeam 5, making the up and down movement of the crossbeam 5 smoother. The setting of the elastic adjustment mechanism can make the caster 7 move relative to the box 15 along the cylinder 3. The spring 4 will be compressed or stretched as the caster 7 and the box 15 move up and down relative to each other, thereby applying its elastic force to the crossbeam slider 9 and the crossbeam 5, and its reaction force pushes back the box 15, thereby causing the wheel frame 11 to lift the box 15.

[0031] As a preferred embodiment of the present invention, it also includes a positioning block 20 and a spring force adjustment nut 12. The upper end of the cylinder 3 is provided with a thread, and the spring force adjustment nut 12 is threadedly connected to the cylindrical support rod 3. The positioning block 20 is fixed to the bottom end of the cylindrical support rod 3 by a top screw, and is used to limit the crossbeam slider 9 to prevent the crossbeam slider 9 from detaching from the cylindrical support rod 3 and adjusting the lifting height of the box body 15; the spring force adjustment nut 12 is located at the top end of the cylindrical support rod 3 and abuts against the spring 4, and is used to adjust the elastic force of the spring 4. Without any external force, the initial elastic force of the spring 4 is adjusted to just make the lower edge of the sealing sponge 16 of the vacuum box body a certain distance from the measured surface, about 50 mm, so that the sealing sponge 16 bonded to the box body 15 will not touch the measured surface and weld when moving forward.

[0032] To perform weld leak testing, the inspector places one or both feet on the foot pedal 24 of the box 15. The inspector's weight forces the box 15 downward, compressing the spring 4 and applying pressure to the sealing sponge 16 attached to the box 15 through its lower edge. This deforms the sponge 16 and creates close contact with the surface of the panel 17 being tested, sealing the box 15. The inspector then closes the air inlet valve 22 and opens the exhaust valve 21 connected to the vacuum pump, evacuating the interior of the box 15. When the negative pressure generated within the box 15 exceeds the elastic force of the eight compressed springs, the vacuum box can no longer be lifted by the spring 4 and has become attached to the surface of the panel 17 being tested. As the vacuum level increases, the attachment becomes increasingly secure, allowing the inspector to descend from the box 15. The inspector then turns on the lighting 13. Once the vacuum level within the box 15 reaches the specified negative pressure, the inspector can then inspect the inspected location through the acrylic observation window 23. During the vacuuming process, the vacuum level is set to the negative pressure value specified by the standard through the safety valve 19. When the vacuum level reaches the set negative pressure, the safety valve 19 trips and leaks air. Therefore, without turning off the vacuum pump, the vacuum level in the box 15 will be maintained at a constant negative pressure value specified by the standard. After the test is completed, the air inlet valve 22 is opened to allow air to rush into the box 15. When the suction force generated by the negative pressure in the box 15 is less than the elastic force of the eight compressed springs, the box 15 will immediately be bounced up by the spring 4, that is, it will be separated from the test surface and restored to the initial height of the box 15. There is no need to wait for the negative pressure to reach zero. The inspector can push the vacuum box to the next test position via the handrail 14 for testing, and repeat this process over and over again.

[0033] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A flat plate weld leak detection vacuum box with wheels, characterized by: The utility model comprises a box body, a sealing sponge, an acrylic observation window, a wheel frame, an elastic adjustment mechanism, casters, a lighting mechanism, an air intake valve and an air exhaust valve. The box body is a hollow structure with upper and lower parts. The sealing sponge is arranged at the bottom end of the box body. The acrylic observation window is sealed and installed at the top end of the box body. The wheel frame is arranged on both sides of the box body. The wheel frame is in an inverted mountain shape. The wheel frame is provided with two cylindrical support rods. The bottom of the cylindrical support rod is not lower than the bottom end of the box body. The elastic adjustment mechanism is arranged on the cylindrical support rod. The casters are arranged on the elastic adjustment mechanism. The lighting mechanism is arranged on the side wall of the top of the box body. The air intake valve is arranged at the top end of the box body. The air exhaust valve is arranged on one side of the box body. The air intake valve and the air exhaust valve are both connected to the box body.

2. The flat plate weld leak detection vacuum box with wheels according to claim 1, characterized in that: It also includes a vacuum gauge and a safety valve. The vacuum gauge is arranged at the top of the box and is connected to the box through a pipeline. The safety valve is arranged on the pipeline between the vacuum gauge and the box.

3. The flat plate weld leak detection vacuum box with wheels according to claim 1, characterized in that: The elastic adjustment mechanism includes a spring, a beam and an axle. The spring is arranged on the cylindrical support rod. Beam sliders are provided at both ends of the beam. The beam sliders are inserted into the cylindrical support rod from the bottom of the cylindrical support rod and conflict with the spring. The axle is arranged at the center of the beam, and the caster is arranged on the axle. The caster is rotatably connected to the axle.

4. The flat plate weld leak detection vacuum box with wheels according to claim 3, characterized in that: It also includes a linear guide rail and a slide. The linear guide rail is arranged in the middle position of the wheel frame. The slide is slidably arranged on the linear guide rail, and the crossbeam is fixedly connected to the slide.

5. The flat plate weld leak detection vacuum box with wheels according to claim 3, characterized in that: It also includes a positioning block, which is fixed to the bottom end of the cylindrical support rod by a top screw and is used to limit the crossbeam slider to prevent the crossbeam slider from separating from the cylindrical support rod and adjust the lifting height of the box body.

6. The flat plate weld leak detection vacuum box with wheels according to claim 3, characterized in that: It also includes a spring force adjustment nut. The top of the cylindrical support rod is provided with a thread. The spring force adjustment nut is threadedly connected to the cylindrical support rod. The spring force adjustment nut is in contact with the spring to adjust the elastic force of the spring.

7. The flat plate weld leak detection vacuum box with wheels according to claim 1, characterized in that: The box also includes a foot pedal, which is arranged on the top of the box body and above the acrylic observation window.

8. The flat plate weld leak detection vacuum box with wheels according to claim 1, characterized in that: The utility model also comprises an armrest, which is longitudinally arranged above the box body, and both ends of the armrest are fixed on the box body.

9. The flat plate weld leak detection vacuum box with wheels according to claim 1, characterized in that: The lighting mechanism is an LED lighting lamp.

10. The flat plate weld leak detection vacuum box with wheels according to claim 9, characterized in that: It also includes a power supply mechanism, which includes a battery compartment and a lithium battery. The battery compartment is arranged on the outer wall of the box body, the lithium battery is arranged in the battery compartment, and the LED lighting lamp is electrically connected to the lithium battery.

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