A device for vacuum testing of tank bottom plate

Abstract

The present invention belongs to the technical field of storage tank installation and pressure vessel manufacturing engineering construction, and specifically relates to a device for vacuum testing of storage tank bottom plates, including: a sealing plate, a vacuum generator, a vacuum gauge, a vent valve and a rubber sponge for sealing the sealing plate; the sealing plate is provided with a first through hole, a second through hole and a third through hole; the vacuum generator, the vacuum gauge and the vent valve are respectively installed at the first through hole, the second through hole and the third through hole, and the rubber sponge is fixedly connected to the bottom of the sealing plate. An air bag is provided at the edge of the sealing plate, and a plurality of balls are provided in the bag, and the air bag is connected to an air pump. This scheme uses compressed air to extract vacuum, and the equipment is light, easy to carry and low in cost; a sealed space is formed by the rubber sponge and the bottom plate, and the rubber sponge is easy to compress, and it is relatively easy to manually squeeze the sealing plate to form a sealed space, and the labor intensity is low. The rubber sponge can make the formed sealed cavity have a better sealing effect, thereby improving the detection efficiency and quality.

Description

Technical Field

[0001] The invention belongs to the technical field of storage tank installation and pressure vessel manufacturing engineering construction, and in particular relates to a device for vacuum testing of a storage tank bottom plate. Background Art

[0002] Storage tanks are used to store refined chemical substances such as acids, alkalis, alcohols, gases, and liquids. Storage tanks are widely used in North China. According to different materials, there are generally: polyethylene tanks, polypropylene tanks, fiberglass tanks, ceramic tanks, rubber tanks, stainless steel tanks, etc.

[0003] In the installation and construction of various storage tanks, the bottom plate weld vacuum test (to check the tightness of the weld) is a very important process. The accuracy of the test results directly affects the quality and safety performance of the storage tank. The original vacuum test method has been using the vacuum box method for many years. The vacuum box is made of steel plate to make the acrylic plate edge, the top plate is glass, and the bottom is in contact with the bottom plate. It is sealed with cement. The vacuum box is evacuated with a vacuum pump to observe and inspect the weld. The vacuum box and vacuum pump are bulky, the vacuum pump is slow to evacuate, and the cement seal is poor. The construction workers have high labor intensity, low detection efficiency and low accuracy. Summary of the invention

[0004] The present invention provides a device for vacuum testing of a bottom plate of a storage tank, which improves detection efficiency.

[0005] In order to achieve the above-mentioned purpose, the present scheme provides a device for vacuum testing of the bottom plate of a storage tank, comprising a sealing plate, and also comprising: a vacuum generator, a vacuum gauge, a vent valve and a rubber sponge for sealing the sealing plate; the sealing plate is provided with a first through hole, a second through hole and a third through hole; the vacuum generator is fixedly installed at the first through hole, and the vacuum generator is connected to the first through hole; the vacuum gauge is fixedly installed at the second through hole, and the vacuum gauge is connected to the second through hole; the vent valve is fixedly installed at the third through hole, and the vent valve is connected to the third through hole; the rubber sponge is fixedly connected to the bottom of the sealing plate; an airbag is provided at the edge of the sealing plate, a plurality of balls are provided in the airbag, one end of the airbag is fixedly connected to the sealing plate, and the airbag is connected to an air pump.

[0006] Principle of this scheme: Drill holes in the sealing plate, make through holes of corresponding sizes on the sealing plate according to the size of the vacuum generator, vacuum gauge and vent valve, install the vacuum generator, vacuum gauge and vent valve at the corresponding through holes, and use glue to seal the corresponding vacuum generator, vacuum gauge and vent valve at the connection with the through holes. Paste rubber sponge on the bottom of the sealing plate so that the edge of the rubber sponge exceeds the edge of the sealing plate. Place the sealing plate on the weld and press the rubber sponge to form a sealed cavity between the sealing plate and the weld. Then use an air pump to inflate the airbag so that the airbag expands and contacts the objects around the weld to improve the sealing of the sealed cavity. At the same time, it can easily and quickly form a sealed cavity between the sealing plate and the weld. The ball rolls with the expansion of the airbag, compresses the airbag and improves the sealing of the sealed cavity. Use the air pipe to transport compressed air to the compressed air inlet of the vacuum generator. According to the Venturi tube principle, the sealed cavity between the sealing plate and the weld is evacuated. The vacuum gauge is used to measure the air pressure of the sealed cavity between the sealing plate and the weld.

[0007] The beneficial effects of this solution are as follows: a vacuum is drawn using compressed air through a vacuum generator, the equipment is light, easy to carry and low in cost; a sealed space is formed by a rubber sponge and a bottom plate, the rubber sponge is easily compressed, and it is relatively easy to form a sealed space by manually squeezing the sealing plate, the labor intensity is low, and the rubber sponge can make the formed sealed cavity have a better sealing effect, thereby improving the detection efficiency and quality.

[0008] Furthermore, a first magnet is fixedly connected to the rubber sponge; a second magnet is placed on the sealing plate, and the second magnet repels the first magnet. The second magnet repels the first magnet. When the weld is uneven, multiple positions need to be pressed, and multiple people need to press to form a sealed cavity. When the weld is relatively large, greater force is required to press. The repulsive force of the magnet can replace manual pressing of the rubber sponge, which can reduce the work intensity, make the rubber sponge close to the sealing plate, and prevent the expansion of the rubber sponge from affecting the air tightness test results of the bottom plate weld.

[0009] Furthermore, a transparent observation window is fixedly installed on the sealing plate. Before the weld air tightness test, soapy water is applied to the weld in advance to observe whether bubbles are generated at the weld. The presence of bubbles indicates that the bottom plate has good air tightness. The result can be compared with the vacuum gauge to determine whether the vacuum gauge is intact, so that the bottom plate weld air tightness test result is more accurate.

[0010] Furthermore, a sealing pad is provided at the edge of the transparent window to prevent gaps from forming at the transparent window, thereby affecting the accuracy of the bottom plate weld air tightness test result.

[0011] Furthermore, a support block for limiting the movement of the sponge is included, the support block is fixedly connected to the bottom of the sealing plate, and the support block is located at the center of the rubber sponge. The support block plays a supporting role to prevent the sponge from being pressed into the vacuum chamber by the vacuum negative pressure.

[0012] Furthermore, a handle is provided on the sealing plate, and the handle is hingedly arranged on the surface of the sealing plate to facilitate taking and placing the test device and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0014] Figure 2 FIG. 1 is a top view of a sealing plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The following is a further detailed description through specific implementation methods:

[0016] The reference numerals in the drawings of the specification include: vacuum generator 1, vacuum gauge 2, vent valve 3, sealing plate 4, support block 5, rubber sponge 6, air bag 7.

[0017] Example:

[0018] As attached Figure 1 As shown, a device for vacuum testing of the bottom plate of a storage tank comprises a sealing plate 4, a vacuum generator 1, a vacuum gauge 2, a vent valve 3 and a rubber sponge 6 for sealing the sealing plate 4. The sealing plate 4 is made of an acrylic plate, and a handle is provided on the sealing plate 4. The handle is hingedly arranged on the surface of the sealing plate 4 to facilitate the placement and operation of the test device. The sealing plate 4 is provided with a first through hole, a second through hole and a third through hole. The vacuum generator 1 is connected to the first through hole through an air pipe, and the connection between the air pipe of the vacuum generator 1 and the first through hole is coated with glue, so that the connection between the vacuum generator 1 and the first through hole is sealed. The vacuum gauge 2 is connected to the second through hole, and the connection between the vacuum gauge 2 and the second through hole is coated with glue, so that the connection between the vacuum gauge 2 and the second through hole is sealed. The vent valve 3 is connected to the third through hole, and the connection between the vent valve 3 and the third through hole is coated with glue, so that the connection between the vent valve 3 and the third through hole is sealed. The rubber sponge 6 is fixed to the bottom of the sealing plate 4 by glue, and the glue is AB glue.

[0019] Drill holes in the sealing plate 4, make through holes of corresponding sizes on the sealing plate 4 according to the sizes of the vacuum generator 1, the vacuum gauge 2 and the vent valve 3, and install the vacuum generator 1, the vacuum gauge 2 and the vent valve 3 at the corresponding through holes. At the same time, apply glue to the joints between the vacuum generator 1, the vacuum gauge 2 and the vent valve 3 and the corresponding through holes to seal them to prevent affecting the air tightness test results of the weld.

[0020] The rubber sponge 6 is pasted on the bottom of the sealing plate 4 so that the edge of the rubber sponge 6 exceeds the edge of the sealing plate 4. The sealing plate 4 is placed on the weld, and the rubber sponge 6 is pressed to form a sealed cavity between the sealing plate 4 and the weld. The compressed air is delivered to the compressed air inlet of the vacuum generator 1 through the air pipe. According to the Venturi tube principle, the sealed cavity between the sealing plate 4 and the weld is evacuated. The vacuum meter 2 is used to measure the air pressure of the sealed cavity between the sealing plate 4 and the weld.

[0021] A first magnet is fixedly connected to the rubber sponge 6, and a second magnet is placed on the sealing plate 4, and the second magnet repels the first magnet. The second magnet repels the first magnet. When the weld is uneven, multiple positions need to be pressed, and multiple people need to press to form a sealed cavity. When the weld is relatively large, a greater force is required to press. The repulsive force of the magnet can replace manual pressing of the rubber sponge 6, which can reduce the work intensity, make the rubber sponge 6 close to the sealing plate 4, and prevent the expansion of the rubber sponge 6 from affecting the air tightness test results of the bottom plate weld.

[0022] The edge of the sealing plate 4 is bonded with an air bag 7. Figure 2 As shown, the airbag 7 is located at the edges of the sealing plate 4. The airbag 7 is provided at the edge of the sealing plate 4. The airbag 7 is in a circular shape. About 20 balls are provided in the airbag 7. The balls are evenly distributed in the airbag 7. One end of the airbag 7 is fixedly connected to the sealing plate 4. The airbag 7 is connected to an air pump. The air pump is an INTEX manual air pump. Use the air pump to inflate the airbag 7 so that the airbag 7 expands and contacts the objects around the weld to improve the sealing of the sealing cavity. At the same time, a sealing cavity can be formed between the sealing plate and the weld conveniently and quickly. The balls roll with the expansion of the airbag 7, pressing the airbag 7 to improve the sealing of the sealing cavity. When there are fewer people, the air pump and the airbag 7 can be used directly to form a sealed cavity between the sealing plate and the weld, speeding up the formation of the sealed cavity and completing the inspection quickly.

[0023] A transparent observation window is provided on the sealing plate 4. A through groove matching the size of the transparent window is cut in the middle of the sealing plate 4. The transparent window is then installed on the through groove. Glue is applied to the contact position between the transparent window and the through groove to fix the transparent window and the sealing plate 4 together. At the same time, the connection between the transparent window and the through groove is sealed to prevent affecting the air tightness test result of the weld. Before conducting the weld air tightness test, soapy water is applied to the weld in advance to observe whether bubbles are generated at the weld. The presence of bubbles indicates that the bottom plate has good air tightness. The result can be compared with the vacuum meter 2 to determine whether the vacuum meter 2 is intact, so that the bottom plate weld air tightness test result is more accurate. A sealing pad is provided at the edge of the transparent window. Prevent gaps at the transparent window from affecting the accuracy of the bottom plate weld air tightness test result.

[0024] It also includes a support block 5 for limiting the movement of the sponge, which is fixedly connected to the bottom of the sealing plate 4 and located at the center of the rubber sponge 6. The support block 5 is made of square steel and plays a supporting role to prevent the sponge from being pressed into the vacuum chamber by the vacuum negative pressure.

[0025] The operation method of this scheme is as follows: Drill the sealing plate 4, make through holes of corresponding sizes on the sealing plate 4 according to the sizes of the vacuum generator 1, vacuum gauge 2 and vent valve 3, and install the vacuum generator 1, vacuum gauge 2 and vent valve 3 at the corresponding through holes. At the same time, the vacuum generator 1, vacuum gauge 2 and vent valve 3 seal the corresponding through holes, and apply glue at the corresponding through hole positions to seal the connection between the vacuum generator 1, vacuum gauge 2 and vent valve 3 and the corresponding through holes. Paste the rubber sponge 6 at the bottom of the sealing plate 4 so that the edge of the rubber sponge 6 exceeds the edge of the sealing plate 4. Apply soapy water on the weld to be tested, place the sealing plate 4 on the weld, and press the rubber sponge 6 to form a sealed cavity between the sealing plate 4 and the weld. Compressed air is delivered to the compressed air inlet of the vacuum generator 1 by an air pipe. According to the Venturi tube principle, the sealed cavity between the sealing plate 4 and the weld is evacuated. The vacuum gauge 2 is used to measure the air pressure of the sealed cavity between the sealing plate 4 and the weld. The pressure value of the vacuum gauge 2 is compared with the atmospheric pressure value. If it is less than the atmospheric pressure value, it means that the tightness of the weld is good. Through the transparent window, observe whether the soapy water at the weld generates a steam bag. The bubble generation is judged by comparing it with the value of the vacuum gauge 2. If no bubble is generated, the device is repaired in time. Use an air pump to inflate the airbag 7 so that the airbag 7 expands and contacts the objects around the weld, thereby improving the sealing of the sealed cavity. At the same time, it can easily and quickly form a sealed cavity between the sealing plate and the weld. The ball rolls with the expansion of the airbag 7, compressing the airbag 7 and improving the sealing of the sealed cavity. This solution uses a vacuum generator 1 to extract vacuum using compressed air. The equipment is light, easy to carry and low in cost. A sealed space is formed between a rubber sponge 6 and a bottom plate. The rubber sponge 6 is easily compressed, and it is relatively easy to manually squeeze the sealing plate 4 to form a sealed space. The labor intensity is low. The rubber sponge 6 can make the formed sealed cavity have a better sealing effect, thereby improving the detection efficiency and quality.

[0026] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for a tank bottom plate vacuum test, comprising a sealing plate (4), characterized in that: Also includes: A vacuum generator (1), a vacuum gauge (2), a vent valve (3) and a rubber sponge (6) for sealing a sealing plate (4); the sealing plate (4) is provided with a first through hole, a second through hole and a third through hole; the vacuum generator (1) is fixedly mounted at the first through hole, and the vacuum generator (1) is in communication with the first through hole; the vacuum gauge (2) is fixedly mounted at the second through hole, and the vacuum gauge (2) is in communication with the second through hole; the vent valve (3) is fixedly mounted at the third through hole, and the vent valve (3) is in communication with the third through hole; the rubber sponge (6) is fixedly connected to the bottom of the sealing plate (4) so ​​that the edge of the rubber sponge (6) exceeds the edge of the sealing plate (4); an air bag (7) is provided at the edge of the sealing plate (4), and a plurality of balls are provided in the air bag (7), and the balls roll and press the air bag (7) as the air bag (7) expands; one end of the air bag (7) is fixedly connected to the sealing plate (4), and the air bag (7) is in communication with an air pump; A first magnet is fixedly connected to the rubber sponge (6); a second magnet is placed on the sealing plate (4), and the second magnet repels the first magnet.

2. The device for tank bottom plate vacuum test according to claim 1, characterized in that: A transparent observation window is fixedly mounted on the sealing plate (4).

3. The device for tank bottom plate vacuum test according to claim 2, characterized in that: A sealing pad is arranged at the edge of the transparent observation window.

4. The device for tank bottom plate vacuum test according to claim 1, characterized in that: It also includes a support block (5) for limiting the movement of the sponge. The support block (5) is fixedly connected to the bottom of the sealing plate (4). The support block (5) is located at the center of the rubber sponge (6).

5. The device for tank bottom plate vacuum test according to claim 1, characterized in that: The sealing plate (4) is provided with a handle, which is hingedly arranged on the surface of the sealing plate (4).

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