Low-pressure air tightness test tool for composite material plate

Abstract

A low-pressure air tightness test tool for a composite material plate belongs to the technical field of plate air tightness test and comprises a box body, a sealing plate is arranged at the top end of the box body, a supporting seat is arranged at the bottom end of the box body, the periphery of the sealing plate extends to the outer side of the box body, and a test port A is formed in the sealing plate. A through hole is formed in the outer side wall of the box body, a blocking plate used for blocking the through hole is arranged in the box body, a screw hole connector located in the through hole is formed in the blocking plate, a pressing plate is arranged above the sealing plate, a test port B corresponding to the test port A is formed in the pressing plate, and the pressing plate and the sealing plate are connected through a fastener. The low-pressure air tightness test tool for the composite material plate is reasonable in design, simple in structure, convenient to use and suitable for popularization, and not only can effectively improve the air tightness inspection efficiency of the plate, but also can effectively reduce the inspection cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to panel air tightness test technical field especially relates to a kind of composite material panel low-pressure air tightness test tool. BACKGROUND

[0002] With the development of composite material technology, it is more and more widely used in various industries, and more functional requirements are put forward for composite material products. In some composite material transport box products, the composite material wall of the transport box is required to have certain sealing performance. Inert gas is filled into the transport box to prolong the storage life of the products in the box and reduce the maintenance frequency. This requires the composite material panel used to make composite material products to have air tightness.

[0003] The current method for checking the air tightness of composite material panels is generally divided into two types:

[0004] One is to check the air tightness of products made of composite material panels. This method usually fills a certain amount of compressed air into the product and checks the pressure change in the product to determine the sealing performance of the product. This method has high cost and inaccurate air tightness test results. The reason is that direct use of products for air tightness test requires a lot of time, material and labor costs to make products, and there is a risk of damaging the product during air tightness test. Because the product structure is usually complex, there are many interfaces, and there are many disturbances to the air tightness test. It usually takes a lot of time to check whether there is air leakage at the interface of the product, and it is difficult to completely eliminate the influence of the mechanical structure of the product on the sealing performance of the product, so the test results are not accurate.

[0005] Another method is to use composite material panel samples to make box-shaped workpieces, fill a certain amount of compressed air into the workpiece, immerse the measured workpiece in water, and determine whether it is air tight by manually observing bubbles. This method is inefficient, requires long-term manual observation, and the observation results are greatly affected by human factors, and the measurement results are not intuitive and cannot be quantitatively recorded.

[0006] The current method for measuring the air tightness of composite material panels has the disadvantages of low efficiency, high cost and inaccurate measurement results. Therefore, it is of great significance to design a test device that can improve the efficiency of air tightness test of composite material panels, reduce test cost and obtain intuitive and accurate measurement results. INVENTION CONTENTS

[0007] The utility model aims at overcoming the deficiencies of low efficiency, high cost and inaccurate measurement results in the prior art, and provides a composite material panel low-pressure air tightness test tool, which is reasonable in design, simple in structure and convenient to use. It not only effectively improves the efficiency of panel air tightness test, but also effectively reduces the test cost, and is suitable for popularization.

[0008] The utility model discloses a composite material board low pressure air tightness test frock which is realized through the following technical scheme: a box body is arranged, the top of the box body is provided with a sealing plate, the bottom of the box body is provided with a support seat corresponding to the sealing plate, the periphery of the sealing plate extends to the outside of the box body, and a test opening A is formed in the sealing plate; a through hole is formed in the outer wall of the box body, a plugging plate is arranged in the box body and used for plugging the through hole, the plugging plate is fixed to the inner wall of the box body, a threaded hole interface is formed in the plugging plate and located in the through hole, and the threaded hole interface is used for connecting an inflation system; a pressing plate is arranged above the sealing plate, a test opening B corresponding to the test opening A is formed in the pressing plate, a placing space for placing a workpiece to be tested is formed between the pressing plate and the sealing plate, and the pressing plate and the sealing plate are connected through fasteners, so that the pressing plate can press the workpiece to be tested.

[0009] Further improvement of the utility model still has, the top side of sealing plate is provided with the sealing strip around test opening A, the bottom side of pressing plate is provided with the sealing gasket around test opening B.

[0010] Further improvement of the utility model still has, the top side of pressing plate is provided with the surrounding board around test opening B, and the surrounding board can form a groove structure at test opening B.

[0011] Further improvement of the utility model still has, the box body, sealing plate, support seat, plugging plate and surrounding board all adopt steel plate material, and the box body, sealing plate, support seat, plugging plate and surrounding board all adopt the way of inside and outside full welding to be connected and fixed.

[0012] Further improvement of the utility model still has, the box body is made of steel plate bending or steel plate tailor welding, and the butt joint of the box body adopts the way of inside and outside full welding to be connected.

[0013] Further improvement of the utility model still has, a plurality of bolt through holes A are formed in the sealing plate and are evenly and spacedly arranged along the circumference of the box body and located at the outside of the box body, a plurality of bolt through holes B corresponding to the bolt through holes A are formed in the pressing plate, and the pressing plate and the sealing plate are detachably connected through a bolt assembly.

[0014] From the above technical scheme, the utility model has the advantages of reasonable design, simple structure, complete function, good interface versatility, easy operation, effectively improved efficiency of board air tightness inspection, effectively reduced inspection cost and suitability for promotion. ACCURACY OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the utility model, the following will be briefly introduced the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0016] Figure 1 It is the structure schematic diagram of the box body of the embodiment of the utility model.

[0017] Figure 2 It is the structure schematic diagram of the pressing plate and the surrounding board of the embodiment of the utility model.

[0018] Figure 3 It is the structure schematic diagram of the pressing plate and the sealing gasket plate of the embodiment of the utility model.

[0019] Figure 4 It is the use state diagram of the embodiment of the utility model.

[0020] Figure 5 It is Figure 4 The exploded view.

[0021] In the drawing: 1, box body;101, through hole;2, sealing plate;201, sealing strip;202, bolt through hole A;3, support seat;4, plugging plate;5, pressing plate;501, sealing gasket;502, bolt through hole B;6, surrounding board;7, workpiece to be measured;8, bolt assembly. Specific embodiments

[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the following will be combined with the drawings in the embodiment, the technical scheme in the utility model is described clearly and completely, obviously, the following described embodiments are only some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by those skilled in the art without creating labor belong to the scope of the patent protection.

[0023] Now refer to the attached Figures 1-3 , combined with specific embodiments, as follows: the utility model discloses a kind of composite material plate low-pressure air-tightness test tool, including box body 1;Specifically, box body 1 is made of steel plate bending or made of steel plate splice welding, and the butt joint of box body 1 is connected using the way of internal and external full welding.It needs to be noted that, box body 1 is calculated to meet that no more than 0.1mm deformation occurs under 0.1Mpa internal pressure, to avoid that the deformation of box body 1 leads to inaccurate test result in the test process.

[0024] The top end of the box body 1 is provided with a sealing plate 2, the bottom end of the box body 1 is provided with a supporting seat 3 corresponding to the sealing plate 2, the periphery of the sealing plate 2 extends to the outside of the box body 1, and a test opening A is formed in the sealing plate 2; specifically, the sealing plate 2 and the supporting seat 3 are made of steel plate material, and the box body 1, the sealing plate 2 and the supporting seat 3 are connected and fixed by full welding inside and outside.

[0025] A through hole 101 is formed in the outer side wall of the box body 1, and it should be noted that the number of the through holes 101 in the box body 1 can be increased or decreased according to test requirements; the inside of the box body 1 is provided with a plugging plate 4 for plugging the through hole 101, and the plugging plate 4 is fixed to the inner side wall of the box body 1; a wire hole interface is formed in the plugging plate 4 and located in the inside of the through hole 101, and the wire hole interface is used for connecting an inflation system, which includes an inflation valve, a pressure gauge and the like; specifically, the plugging plate 4 is made of steel plate material, and the plugging plate 4 and the inner side wall of the box body 1 are connected and fixed by full welding inside and outside.

[0026] A pressing plate 5 is arranged above the sealing plate 2, a test opening B corresponding to the test opening A is formed in the pressing plate 5, a placing space for placing a workpiece 7 to be tested is formed between the pressing plate 5 and the sealing plate 2, and the pressing plate 5 and the sealing plate 2 are connected by fasteners, so that the pressing plate 5 can press the workpiece 7 to be tested; specifically, a plurality of bolt through holes A202 are formed in the sealing plate 2 and arranged uniformly and at intervals along the circumference of the box body 1 and located outside the box body 1, a plurality of bolt through holes B502 corresponding to the bolt through holes A202 are formed in the pressing plate 5, and the pressing plate 5 and the sealing plate 2 are detachably connected by a bolt assembly 8. It should be noted that the bolt assembly 8 is tightened by a torque wrench, the torque is determined according to the compression strength of the composite plate, and the torque value is recommended to be 15N·m.

[0027] The use principle of the utility model is as follows: Figure 4 and 5 The test tool body is suitable for sealing detection of various composite material plates under a pressure of 0.1Mpa, the workpiece 7 to be tested is cut from a composite plate, the size of the workpiece 7 to be tested is determined according to the size of the test opening and the position of the bolt assembly 8, the workpiece 7 to be tested needs to be edge processed and does not interfere with the installation of the bolt assembly 8.

[0028] When applied, first, the test tool is placed in a constant temperature space, the environmental temperature is controlled in a relatively stable environment, the test accuracy is reduced by avoiding the influence of the sharp change of the environmental temperature on the gas pressure change in the tool.

[0029] Then the workpiece 7 to be tested is installed into the placement space formed between the pressing plate 5 and the sealing plate 2, and the pressing plate 5 is pressed against the workpiece 7 to be tested through the bolt assembly 8. Then the inflation valve is opened to perform the inflation operation, and the inflation is stopped when the pressure indication reaches the requirement of the air tightness inspection.

[0030] Finally, the test tool is left for 30-60 minutes to make the gas pressure in the tool uniformly distributed. Then the ambient atmospheric pressure, the ambient temperature and the pressure in the tool are monitored, the gas pressure in the tool is converted into the pressure value under the required temperature environment by using the ideal gas state equation, and the air tightness of the workpiece 7 to be tested is judged by the pressure value curve with time.

[0031] In one of the embodiments, the top side of the sealing plate 2 is provided with a sealing strip 201 surrounding the test opening A, and the bottom side of the pressing plate 5 is provided with a sealing gasket 501 surrounding the test opening B. Specifically, the sealing strip 201 and the sealing gasket 501 are both installed on the sealing plate 2 and the pressing plate 5 in an embedded manner, and the sealing strip 201 and the sealing gasket 501 are both made of silica gel and bonded to the workpiece 7 to be tested, so as to improve the sealing property of the test tool.

[0032] In one of the embodiments, the top side of the pressing plate 5 is provided with a surrounding plate 6 surrounding the test opening B, and the surrounding plate 6 can form a groove structure at the test opening B. Specifically, the surrounding plate 6 is made of steel plate, and the surrounding plate 6 is fixed between the pressing plate 5 in an inner and outer full welding manner. The strength of the pressing plate 5 can be improved by the surrounding plate 6, and the surrounding plate 6 forms a groove structure at the test opening B. When the air tightness of the workpiece 7 to be tested is poor, a small amount of water can be added into the groove to facilitate the observation of the air leakage point and the air leakage phenomenon.

[0033] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite material panel low pressure airtightness test tooling comprising a box body (1), characterized in that, The top end of the box body (1) is provided with a sealing plate (2), the bottom end of the box body (1) is provided with a supporting seat (3) corresponding to the sealing plate (2) up and down, the periphery of the sealing plate (2) extends to the outside of the box body (1), and a test opening A is formed in the sealing plate (2); a through hole (101) is formed in the outer side wall of the box body (1), the inside of the box body (1) is provided with a plugging plate (4) for plugging the through hole (101), the plugging plate (4) is fixed on the inner side wall of the box body (1), and a wire hole interface is formed in the plugging plate (4) and located in the through hole (101), the wire hole interface is used for connecting an inflation system; a pressing plate (5) is arranged above the sealing plate (2), the pressing plate (5) is provided with a test opening B corresponding to the test opening A, a placing space for placing a workpiece (7) to be tested is formed between the pressing plate (5) and the sealing plate (2), and the pressing plate (5) and the sealing plate (2) are connected through fasteners, so that the pressing plate (5) can press the workpiece (7) to be tested.

2. The low pressure air tightness test tooling for composite panels of claim 1, wherein, A sealing strip (201) is arranged on the top side of the sealing plate (2) and surrounds the test opening A, and a sealing gasket (501) is arranged on the bottom side of the pressing plate (5) and surrounds the test opening B.

3. The composite material panel low pressure airtightness test tooling of claim 1 or 2, wherein, A surrounding plate (6) is arranged on the top side of the pressing plate (5) and surrounds the test opening B, and the surrounding plate (6) can form a groove structure at the test opening B.

4. The composite material panel low pressure airtightness test tooling of claim 3, wherein, The box body (1), the sealing plate (2), the supporting seat (3), the plugging plate (4) and the surrounding plate (6) are all made of steel plate, and the box body (1), the sealing plate (2), the supporting seat (3), the plugging plate (4) and the surrounding plate (6) are all connected and fixed by full welding inside and outside.

5. The composite material panel low pressure airtightness test tooling of claim 4, wherein, The box body (1) is made of steel plate bending or steel plate tailor welding, and the butt joint of the box body (1) is connected by full welding inside and outside.

6. The composite material panel low pressure airtightness test tooling of claim 5, wherein, A plurality of bolt through holes A (202) are formed in the sealing plate (2) and arranged uniformly and spaced apart along the circumference of the box body (1) and located outside the box body (1), a plurality of bolt through holes B (502) corresponding to the bolt through holes A (202) are formed in the pressing plate (5), and the pressing plate (5) and the sealing plate (2) are detachably connected through a bolt assembly.

Images