Vacuum detection device and welding seam sealing performance detection method

Abstract

The invention provides a vacuum detection device, which is used for detecting the sealing performance of a welding seam between a first welding surface and a second welding surface, and comprises a soft cushion, a first cover body, a second cover body, a flexible film and an air valve assembly, and the first cover body and the second cover body are jointly arranged above the soft rubber cushion and are opposite to each other at an interval. The soft pad is used for being attached to the first welding face and the second welding face to form a pre-closed space, and the pre-closed space is located above the weld joint in a spaced mode. The flexible film is arranged at the interval, and the two ends of the flexible film are fixed between the first cover body and the soft pad and between the second cover body and the soft pad respectively. The air valve assembly communicates with the pre-closed space through the first cover body or the second cover body and is used for sucking the pre-closed space into a vacuum area. The invention further provides a welding seam vacuum detection method. The device and the method have the function of adjusting the angle of the working surface.

Description

Technical Field

[0001] The invention relates to the field of sealing detection, and in particular to the field of weld vacuum detection. Background Art

[0002] After the visual inspection of the weld is completed, a vacuum test is generally performed on the weld position to prevent defects such as pores in the weld, which may cause problems such as lack of sealing.

[0003] The vacuum detection devices widely used at present are generally flat vacuum detection boxes, which have a relatively limited application range. On the weld plane, the usual method is to buckle the vacuum detection box on the weld, evacuate the box body, and then judge whether the weld has leakage by whether bubbles appear. The detection box can usually only handle flat welds. When a weld surface has a corner, it is not easy to form a sealing operation in the corner area.

[0004] For welding surfaces with angles, the flat vacuum inspection box is currently heat treated to soften it, and then bent to an angle close to the weld. However, when in use, the gap between the box body and the welding surface is large, and a thick sponge or manual work is required to block the gap. In addition, the vacuum box will be fixed after cooling down, and the angle is fixed and cannot be changed arbitrarily, and it does not have the function of following the angle of the working surface. Summary of the invention

[0005] An object of the present invention is to provide a vacuum detection device with an adjustable interface, which has the function of adjusting the working surface angle.

[0006] To achieve the above-mentioned purpose, a vacuum detection device is used to detect the sealing of the weld between a first welding surface and a second welding surface. The device includes a soft pad, a first cover body, a second cover body, a flexible membrane and an air valve assembly. The first cover body and the second cover body are jointly arranged above the soft rubber-plastic pad and are opposite to each other with a gap. The soft pad is used to fit the first welding surface and the second welding surface to form a pre-sealed space, and the gap is located above the weld; the flexible membrane is arranged at the gap, and its two ends are respectively fixed between the first cover body and the soft pad, and between the second cover body and the soft pad; the air valve assembly is connected to the pre-sealed space through the first cover body or the second cover body, and is used to suck the pre-sealed space into a vacuum area.

[0007] In one or more embodiments, the device further comprises a vacuum gauge, and the vacuum gauge is connected to the pre-sealed space through the second cover body or the first cover body.

[0008] In one or more embodiments, the gas valve assembly includes a gas valve body, an exhaust valve, a suction tube, and a vacuum pump docking port.

[0009] In one or more embodiments, the device also includes a lighting assembly, which is arranged between the first cover body and / or the second cover body and the soft pad, and includes a plastic shell and a light strip. The top of the plastic shell is respectively connected to the bottom of the first cover body and / or the second cover body, and the plastic shell is provided with a battery slot.

[0010] In one or more embodiments, the light strip includes an LED light strip and a soft light strip wrapped around the outside of the LED light strip, and one end of the soft light strip is in contact with the inner wall of the soft pad.

[0011] In one or more embodiments, the soft pad is also used to fit at least a portion of the weld.

[0012] In one or more embodiments, the first cover body and the second cover body are provided with handles.

[0013] Another object of the present invention is to provide a method for detecting the sealing of a weld, which method comprises the following steps: applying soapy water to the weld; attaching the first cover body and the second cover body and the soft pad thereunder to the first welding surface and the second welding surface respectively, and positioning the flexible membrane above the weld and pressing it so that the soft pad and the weld are fitted at the folded corner to form a pre-sealed space; using an air valve assembly to evacuate the pre-sealed space until a vacuum area is formed; observing the soap bubbles at the weld to determine the sealing of the weld.

[0014] In one or more embodiments, a vacuum gauge is used to determine the vacuum level of the pre-sealed space.

[0015] In one or more embodiments, the device further comprises a lighting assembly, and the lighting assembly is turned on to observe whether there are soap bubbles at the weld.

[0016] The above-mentioned vacuum detection device and method rely on the fitting of the soft pad and the welding surface to be suitable for welding surfaces with various different folding angles, and by pressing the flexible membrane at the weld, the flexible membrane will bend and fit the angle of the folding angle, thereby promoting further close fitting of the soft rubber-plastic pad and the folding angle position, and with the help of suction of the air valve assembly, after the pre-sealed space is sucked into a vacuum area, the soft pad is tightly fitted with the welding surface under the extrusion and negative pressure of the cover plate, thereby improving the fit of the device and the durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a front view of the vacuum detection device;

[0019] Figure 2 is a top view of the vacuum detection device;

[0020] Figure 3 yes Figure 1 A partial enlarged view of the middle part;

[0021] Figure 4 is a bottom view of the vacuum detection device;

[0022] Figure 5 is a schematic diagram of the vacuum detection device in a bent state;

[0023] Figure 6 It is a partial front view enlarged structural schematic diagram of the soft pad;

[0024] Figure 7 It is a schematic diagram of the coordination between the vacuum detection device, the first welding surface and the second welding surface.

[0025] Description of Reference Numerals

[0026] 1. First cover

[0027] 2 Soft pads

[0028] 3 Vacuum gauge

[0029] 4 Reserved partition slot

[0030] 5. Flexible membrane

[0031] 6 Valve body

[0032] 7 Inlet valve

[0033] 8 Exhaust valve

[0034] 9 Suction tube

[0035] 10 Vacuum pump connection port

[0036] 11 Plastic housing

[0037] 12 Battery slot

[0038] 13 Switch

[0039] 14 Soft Light Strip

[0040] 15 LED light strip

[0041] 16 Grip

[0042] 17 Rubber sheath

[0043] 18 Second cover

[0044] 19 Interval

[0045] 100 Vacuum detection device

[0046] 110 First welding surface

[0047] 120 Second welding surface

[0048] 130 Weld DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0050] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0051] Reference Figure 1 and Figure 7 It is understood that the vacuum detection device 100 is used to detect the sealing of the weld 130 between the first welding surface 110 and the second welding surface 120 .

[0052] The vacuum detection device comprises a soft pad 2, a first cover body 1, a second cover body 18, a flexible membrane 5 and an air valve assembly.

[0053] The first cover 1 and the second cover 18 are disposed above the soft pad 2 and face each other with a gap 19, and the gap 19 forms a reserved partition groove 4. The vertical center lines of the soft pad 2 and the reserved partition groove 4 coincide with each other. Figure 2 The soft pad 2 is used to fit the first welding surface 110 and the second welding surface 120, and in some embodiments, it is also fitted with part of the weld to form a pre-enclosed space, and the gap 19 is located above the weld. The air valve assembly is connected to the pre-enclosed space through the first cover body or the second cover body, and is used to suck the pre-enclosed space into a vacuum area.

[0054] The material of the soft pad 2 includes but is not limited to soft rubber and plastic pad material. The material of the first cover body 1 and the second cover body 18 includes but is not limited to organic glass plate.

[0055] Preferably, the first cover body 1 and the second cover body 18 have the same size and thickness.

[0056] The flexible membrane 5 is arranged at the interval 19, and its two ends are respectively fixed between the first cover body 1 and the soft pad 2, and between the second cover body 18 and the soft pad 2. The flexible membrane 5 is glued to the bottom of the first cover body 1 and the second cover body 18, respectively. The width of the flexible membrane 5 is greater than the width of the reserved partition groove, and the bottom end of the flexible membrane is connected to the top end of the soft rubber-plastic pad. The flexible membrane is preferably a transparent polyimide film. A flexible CPI film is arranged at the corner where the interval 19 is located, which fits tightly with the foldable soft pad 2 below, so that the corner has the characteristics of high heat resistance, high reliability and flex resistance.

[0057] During vacuum testing, air is pumped out and the operator presses the vacuum plate. The soft pad 2, the cover body and the welding surface form a closed space. This space gradually becomes negative pressure. The first cover body 1 and the second cover body 18 gradually squeeze the soft pad 2, and external gas cannot enter. The foldable soft pad 2 and the flexible membrane 5 have good sealing properties at the folded corner, which ensures the tightness of this place after the folded corner.

[0058] Preferably, the bendable flexible CPI film has good light transmittance, and after being folded, it does not affect the observation of the airtightness of the inspected weld during the inspection process, and does not affect the inspection results.

[0059] In some embodiments, the device further comprises a vacuum gauge 3, which is connected to the pre-sealed space through the second cover 18 or the first cover 1. Figure 1 In the illustrated embodiment, the vacuum gauge 3 and the gas valve assembly are respectively disposed on the first cover body 1 and the second cover body 18 , and are connected to the pre-sealed space via the holes 3 ′ and 6 ′.

[0060] The gas valve assembly includes a gas valve body 6, an air inlet valve 7, an exhaust valve 8, a suction pipe 9 and a vacuum pump interface 10. Figure 3 As shown, an air inlet valve 7 is provided on one side of the air valve body 6, and the soft pad 2, the vacuum gauge 3, and the interior of the air valve body 6 are connected. A suction pipe 9 is installed on one side of the exhaust valve 8, and a vacuum pump docking port 10 is installed at the end of the suction pipe 9. When in use, the vacuum pump docking port 10 is connected to the vacuum pump, the exhaust valve 8 on the air valve body 6 is opened, and the air inlet valve 7 is closed. The vacuum pump quickly discharges the air between the soft pad 2 and the weld through the suction pipe 9, and a vacuum area is formed between the first cover plate 1, the soft pad 2, the flexible membrane 5, and the second cover plate 18. The vacuum gauge 3 can feedback the internal vacuum degree.

[0061] In order to effectively observe the internal welding seam, the device is also equipped with a lighting component, such as Figure 4 and Figure 6As shown, the lighting assembly is arranged between the first cover 1 and / or the second cover 18 and the soft pad 2, and includes a plastic shell 11 and a light strip. Furthermore, the light strip includes an LED light strip 15 and a soft light strip 14 wrapped around the LED light strip 15, and one end of the soft light strip 14 is in contact with the inner wall of the soft pad 2. The top of the plastic shell 11 is connected to the bottom of the first cover 1 and / or the second cover 12, respectively. A battery slot 12 is arranged inside one end of the plastic shell 11, and a switch 13 is arranged on one side of one end of the plastic shell 11.

[0062] When in use, before conducting a vacuum test, take two sets of No. 5 batteries and install them in the battery slot on the plastic shell, turn on the switch, the LED light strip conducts light, and after being softened by the soft light strip, a soft white light is formed, which can contrast with the soap bubbles at the weld, making it easy to observe whether soap bubbles appear, thereby realizing the function of increasing the contrast with internal lighting.

[0063] Preferably, the first cover body 1 and the second cover body 18 are further provided with a handle 16 and a rubber sheath 17. When in use, when carrying or pressing the device, the operator can operate by directly holding the handle, which is convenient for grasping and pressing. The rubber sheath can soften the contact position of the palm, reduce hand wear, and realize the function of facilitating grasping and pressing. Preferably, the handle 16 is arranged to be symmetrically distributed about the vertical center line of the soft pad 2, which is convenient for grasping and pressing. The rubber sheath 17 can soften the contact position of the palm and reduce hand wear.

[0064] The above-mentioned device presents a hollow and closed structure under vacuum conditions through the cover plate and the soft pad at the corner, which can achieve a sealing effect, and further arranges a flexible CPI film at the corner to improve the foldability and heat resistance of the corner, prevent deformation and damage causing leakage, and the vacuum box can be adsorbed on the weld by arbitrarily adjusting the corner, thereby realizing the function of adjustable working surface angle.

[0065] In combination with the introduction to the above vacuum detection device, a method for detecting weld sealing properties can also be understood. The method includes the following steps.

[0066] Apply soapy water to weld 130 .

[0067] The first cover 1 and the second cover 18 and the soft pad 2 thereunder are attached to the first welding surface 110 and the second welding surface 120 respectively, and the flexible membrane 5 is located above the weld and pressed along the direction P toward the weld, so that the soft pad 2 fits the folded corner of the weld 130. When pressed, the flexible CPI membrane will bend to fit the folded corner, so that the soft rubber-plastic pad fits tightly to the folded corner to form a pre-enclosed space. In actual operation, the soft pad 2 is only located a few millimeters above the weld 130.

[0068] The air valve assembly is used to evacuate the pre-sealed space. The vacuum pump quickly discharges the air between the soft pad 2 and the weld through the suction pipe 9 to form a negative pressure state. The cover plate gradually squeezes the soft pad. At this time, a vacuum area is formed between the first cover plate 1, the soft pad 2, the second cover plate 18, the first welding surface 110, and the second welding surface 120.

[0069] The vacuum gauge 3 feeds back the internal vacuum degree. If there is air leakage at the weld, the soap liquid will blow out small bubbles one by one. Then, by observing the soap bubbles at the weld, the sealing of the weld can be judged.

[0070] Before vacuuming, the lighting assembly can be turned on, and the LED light strip 15 conducts light, which is softened by the soft light strip 14 to form a soft white light, which can contrast with the soap bubbles at the weld, making it easy to observe whether soap bubbles appear.

[0071] The above method uses a large-area soft pad to achieve the combination of welding surfaces at any angle, and uses a flexible membrane to connect the gap between the two cover plates, thereby enhancing the strength and deformation capacity of the soft pad in the gap, simply and conveniently shaping a sealed space with good sealing properties, and at the same time realizing the function of adjustable working surface angle, which is suitable for 180° planes or angled structures at any angle.

[0072] It should be noted that the above content uses words such as "first" and "second" to limit components, which is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0073] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0075] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A vacuum detection device for detecting the tightness of a weld between a first welding surface and a second welding surface, characterized in that: The device includes: Soft cushion; The first cover body and the second cover body are jointly arranged above the soft rubber-plastic pad and face each other with a gap, the soft pad is used to fit the first welding surface and the second welding surface to form a pre-enclosed space, and the gap is located above the welding seam; A bendable flexible membrane is disposed at the interval, with two ends thereof respectively fixed between the first cover and the soft pad, and between the second cover and the soft pad; and The air valve assembly is connected to the pre-sealed space through the first cover body or the second cover body, and is used to suck the pre-sealed space into a vacuum area.

2. The vacuum detection device according to claim 1, characterized in that: The device also includes a vacuum gauge, which is connected to the pre-sealed space through the second cover body or the first cover body.

3. The vacuum detection device according to claim 1, characterized in that: The gas valve assembly comprises a gas valve body, an exhaust valve, a suction pipe and a vacuum pump docking port.

4. The vacuum detection device according to claim 1, characterized in that: The device also includes a lighting component, which is arranged between the first cover body and / or the second cover body and the soft pad, and includes a plastic shell and a light strip. The top of the plastic shell is respectively connected to the bottom of the first cover body and / or the second cover body, and the plastic shell is provided with a battery slot.

5. The vacuum detection device according to claim 4, characterized in that: The light strip comprises an LED light strip and a soft light strip wrapped around the outside of the LED light strip, and one end of the soft light strip is in contact with the inner wall of the soft pad.

6. The vacuum detection device according to claim 1, characterized in that: The soft pad is also used to fit at least a portion of the weld.

7. The vacuum detection device according to claim 1, characterized in that: The first cover body and the second cover body are provided with handles.

8. A method for detecting the tightness of a weld, characterized in that: The method is carried out using the vacuum detection device according to any one of claims 1 to 7, and comprises the following steps: Apply soapy water to the weld; Attach the first cover body and the second cover body and the soft pad thereunder to the first welding surface and the second welding surface respectively, and place the flexible membrane above the welding seam and press it so that the corners of the soft pad and the welding seam fit together to form a pre-enclosed space; Using the air valve assembly to evacuate the pre-enclosed space until a vacuum area is formed; Observe the soap bubbles at the weld to determine the tightness of the weld.

9. The weld sealing detection method according to claim 8, characterized in that: Use a vacuum gauge to determine the vacuum level of the pre-sealed space.

10. The weld sealing detection method according to claim 9, characterized in that: The device also includes a lighting component, which is turned on to observe whether there are soap bubbles at the welding seam.

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