An electrical appliance housing pressure-bearing test device

Abstract

The present invention relates to a pressure-bearing test device for an electrical appliance housing, comprising: a sealing cover plate for sealingly plugging the open end of the electrical appliance housing to be tested, the sealing cover plate having an inner side surface facing the electrical appliance housing to be tested; a filler protruding and fixedly arranged on the inner side surface of the sealing cover plate, when the sealing cover plate plugs the open end of the electrical appliance housing to be tested, the solid filler enters the electrical appliance housing to be tested and occupies the internal space of the electrical appliance housing to be tested; the filler has a water filling cavity for filling a water medium to balance the external water pressure borne by the filler. By arranging the filler on the inner side of the sealing cover plate, when performing the pressure-bearing test, the filler occupies the internal space of the electrical appliance housing, the amount of water used in the test is small, and the water injection time is greatly shortened, so that the efficiency of the pressure-bearing test can be improved. Since a water filling cavity is arranged inside the filler, the injected water medium can be used to balance and offset the external water pressure of the filler, thereby effectively reducing the cost, and the filler before water filling is lighter and convenient for manual handling.

Description

Technical Field

[0001] The present invention belongs to the technical field of shell pressure testing, and particularly relates to an electrical appliance shell pressure testing device. Background Art

[0002] According to the relevant standards of the high-voltage electrical appliance industry, before leaving the factory, the shell of high-voltage electrical appliances needs to pass a pressure test to verify the product quality. At present, the more commonly used pressure test method is water injection test. Select a hole on the shell as the water injection hole, seal the cover plate at the opening end of the shell, block other holes on the shell, inject water with a set pressure into the water injection hole, and finally verify whether the electrical appliance shell meets the technical requirements through test processes such as leak detection, pressure increase, and pressure holding.

[0003] For metal shells with different volumes, the time spent on the water injection process varies greatly. For high-voltage electrical appliance shells, some shells are 3 - 4 meters, and some are 3 - 6 meters. Operators can directly drill into the shell for operation. In this way, for larger electrical appliance shells, the proportion of the water injection time in the entire test time is very large, while the time for leak detection and pressure holding is very small, resulting in low pressure test efficiency.

[0004] Actually, in the Chinese invention patent application with the application publication number CN105403462A, a filling type water pressure test method for an engine metal shell is disclosed. When performing the water pressure test, a filling body is filled into the shell to occupy most of the internal space. When injecting water, only a small amount of water medium needs to be injected to fill the space between the shell and the filling body, which is convenient for subsequent completion of the water pressure test. Since the filling body is used to replace a large amount of space water medium, the water injection time is shortened, the pressure test time can be effectively reduced, and the test efficiency is improved. However, in the above method, the filling body is directly filled into the shell as a free part, and it is necessary to be careful not to bump the shell when putting it in and taking it out, and the operation is cumbersome. Moreover, in order to ensure sufficient pressure-bearing strength, a solid body is mostly used, which results in a large self-weight of the filling body and inconvenient handling during the test. Summary of the Invention

[0005] The purpose of the present invention is to provide an electrical appliance shell pressure testing device to solve the technical problem in the prior art that a solid filling body has a large self-weight and is inconvenient to handle.

[0006] To achieve the above purpose, the technical solution of the electrical appliance shell pressure testing device provided by the present invention is: an electrical appliance shell pressure testing device, including:

[0007] A sealing cover plate for sealing the opening end of the electrical appliance shell to be tested. The sealing cover plate has an inner side surface facing the electrical appliance shell to be tested;

[0008] The filler is protruding and fixed on the inner side of the sealing cover plate. When the sealing cover plate seals the open end of the housing of the electrical appliance to be tested, the solid filler enters the housing of the electrical appliance to be tested and occupies the inner space of the housing of the electrical appliance to be tested;

[0009] The filler has a water-filled cavity for filling with water medium to balance the external water pressure borne by the filler.

[0010] The beneficial effect is that in the pressure test device for the electrical housing provided by the present invention, a filler is arranged on the inner side of the sealing cover plate. When the pressure test is performed, the filler occupies the internal space of the electrical housing, and water is only injected into the gap between the filler and the electrical housing. The amount of water used in the test is small, and the water injection time is greatly shortened, thereby improving the efficiency of the pressure test. Moreover, since a water-filled cavity is arranged inside the filler, the injected water medium can be used to balance and offset the water pressure outside the filler, thereby effectively reducing the cost, and the filler before being filled with water is relatively light, which is convenient for manual handling.

[0011] As a further improvement, the filler is formed by assembling a plurality of filling blocks, and the plurality of filling blocks are arranged in sequence along a direction perpendicular to the inner side surface of the sealing cover plate.

[0012] The beneficial effect is that it is assembled from a plurality of filling blocks, which is convenient for carrying and assembling.

[0013] As a further improvement, each filling block can be detachably assembled together.

[0014] The beneficial effect is that solid fillers of different lengths can be conveniently selected according to electrical appliance housings of different types and sizes.

[0015] As a further improvement, each filling block has a rigid shell, and each rigid shell has the water filling cavity and the water filling port.

[0016] The beneficial effect is that the filling block adopts a rigid shell, which is convenient for processing and manufacturing, and also convenient for assembly and stacking.

[0017] As a further improvement, at least two fixing rods are provided on the sealing cover plate, and all the fixing rods extend in parallel toward the inner side of the sealing cover plate along the arrangement direction of the filling blocks. A perforation is provided on the rigid shell of each filling block, and the perforation is separated from the water-filled chamber for the fixing rod to pass through, so that all the filling blocks are installed on the fixing rod, and a clamping structure is detachably assembled at the end of the fixing rod away from the sealing cover plate to clamp and fix all the filling blocks on the sealing cover plate.

[0018] The beneficial effect is that the filling block is installed by using the fixing rod, and the installation and disassembly is more convenient.

[0019] As a further improvement, the pressing structure includes a pressing plate. The pressing plate is provided with a through hole for the fixing rod to pass through. A fastening nut is screwed on the corresponding end of the fixing rod. The fastening nut is in pressing fit with the pressing plate, so that when the fastening nut is tightened, all the filling blocks are pressed and fixed on the sealing cover plate through the pressing plate.

[0020] The beneficial effect is that: by adopting the cooperation of the pressing plate and the fastening nut, it is convenient to press the filling blocks.

[0021] As a further improvement, each filling block is a water storage bag. The inner cavity of each water storage bag forms the water filling cavity of the filler. Each water storage bag is provided with a water filling port.

[0022] The beneficial effect is that: by adopting the water storage bag as the filling block, the structure is simple and the production is convenient.

[0023] As a further improvement, a cage structure is provided on the inner side surface of the sealing cover plate. The cage structure extends towards the inner side of the sealing cover plate in parallel along the arrangement direction of the filling blocks. Each water storage bag is placed in the cage structure to form the filler.

[0024] The beneficial effect is that: by adopting the cage structure to place the water storage bag, it is convenient to assemble to form the filler.

[0025] As a further improvement, the sealing cover plate has an outer side surface facing away from the filler. A counterweight frame is fixedly provided on the outer side surface of the sealing cover plate. A lifting point is provided on the counterweight frame. A counterweight installation part is provided on the counterweight frame. The counterweight installation part and the sealing cover plate are located on both sides of the lifting point, and are used for hoisting and transporting the electrical appliance housing pressure test device so that the sealing cover plate seals the opening end of the electrical appliance housing to perform a horizontal pressure test.

[0026] The beneficial effect is that: by configuring the counterweight frame and the counterweight installation part on the outer side of the sealing cover plate, it is convenient to balance the entire test device during the horizontal pressure test and facilitate hoisting and transporting.

[0027] As a further improvement, the sealing cover plate is fixedly installed upward on the support platform. The filler is located above the sealing cover plate, and is used for hoisting the electrical appliance housing to be buckled on the sealing cover plate to perform a vertical pressure test.

[0028] The beneficial effect is that: the filler is located above the sealing cover plate, which is convenient for performing a vertical pressure test to meet the test requirements of different electrical appliance housings. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of Embodiment 1 of the electrical appliance housing pressure test device provided by the present invention;

[0030] Figure 2This is a schematic structural diagram of Embodiment 2 of the electrical appliance housing pressure-bearing test device provided by the present invention.

[0031] Explanation of reference numerals:

[0032] Figure 1 Among them: 1 - counterweight, 2 - counterweight frame, 3 - lifting appliance, 4 - sealing cover plate, 5 - filling block, 6 - electrical appliance housing, 7 - fixing rod, 8 - water injection hole, 9 - pressing plate, 10 - water filling hole.

[0033] Figure 2 Among them: 3 - lifting appliance, 4 - sealing cover plate, 6 - electrical appliance housing, 7 - fixing rod, 8 - water injection hole, 10 - water filling port, 11 - water storage bag, 20 - support platform. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings below is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0036] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude other elements in the process, method including the said element.

[0037] In the description of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" that may appear should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object of "provided with" may be a part of the body, or it may be arranged separately from the body and connected to the body, and this connection may be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0039] The present invention will be further described in detail below in conjunction with embodiments.

[0040] Specific Embodiment 1 of the electrical appliance housing pressure-bearing test device provided by the present invention:

[0041] As Figure 1 shown, the electrical appliance housing pressure-bearing test device in this embodiment is applied to horizontal pressure-bearing tests. During the test, the electrical appliance housing 6 is horizontally fixedly arranged, and the hoisting test device is horizontally translated into the electrical appliance housing 6. The test device includes a sealing cover plate 4, and the sealing cover plate 4 is used to horizontally seal and block the open end of the electrical appliance housing 6 to be tested. As a part of the tooling, the sealing cover plate 4 can be modified from the cover plate that cooperates with the electrical appliance housing 6 to be tested in the actual product, or it can be an imitation of the cover plate that cooperates with the electrical appliance housing 6 to be tested. One side surface of the sealing cover plate 4 is the inner side surface, and the other side surface is the outer side surface. The inner side surface faces the electrical appliance housing 6 to be tested during the test. A sealing structure can be provided on the inner side surface of the sealing cover plate 4, such as a sealing ring, to seal and cooperate with the open end of the electrical appliance housing 6. The outer side surface of the sealing cover plate 4 is arranged back to the inner side surface and is used to install the counterweight tooling.

[0042] A filler is fixedly protruded on the inner side surface of the sealed housing, and the filler is protruded horizontally. When the sealing cover plate 4 blocks the open end of the electrical appliance housing 6 to be tested, the filler enters the electrical appliance housing 6 to be tested and occupies the internal space of the electrical appliance housing to be tested. During the pressure-bearing test, since a part of the internal space of the electrical appliance housing 6 is occupied, the amount of water injection is much less, thereby reducing the water injection time and effectively improving the water injection efficiency.

[0043] Figure 1In the figure, the filler is formed by assembling filling blocks 5 which are stacked in sequence in the transverse direction. The distribution direction of the filling blocks 5 is perpendicular to the inner side of the sealing cover plate 4. Each filling block 5 has a rigid shell. The rigid shell has a water filling cavity and a water filling port 10. On the basis of ensuring strength, it is convenient to manufacture. The rigid shell can adopt a hard plastic shell with a light weight.

[0044] Each of the filling blocks 5 here can be assembled together detachably. To facilitate assembly and disassembly, two fixing rods 7 are fixed on the inner side of the sealing cover plate 4. Both fixing rods 7 extend in parallel toward the inner side of the sealing cover plate 4 in the transverse direction. The rigid shell of each filling block 5 is prefabricated with perforations, which are separated from the water-filled cavity for the fixing rods 7 to pass through, so that all the filling blocks 5 are installed on the fixing rods 7. A clamping structure is detachably installed at the end of the fixing rod 7 away from the sealing cover plate 4 to clamp and fix all the filling blocks 5 on the sealing cover plate 4. Specifically, the detachable clamping structure includes a pressing plate 9 and a fastening nut. The pressing plate 9 is provided with a perforation for the fixing rod 7 to pass through. A fastening nut is screwed on the corresponding end of the fixing rod 7. The fastening nut is press-fitted with the pressing plate 9, so that when the fastening nut is screwed, all the filling blocks 5 are clamped and fixed on the sealing cover plate 4 through the pressing plate 9.

[0045] Considering the support stability, more than three fixing rods 7 may be evenly arranged, which is mainly determined by the radial size of the filling block 5. Of course, in other embodiments, a cage structure may also be used to place the filling block 5.

[0046] It should be noted that the use of the fastening nut as a detachably connected compression structure facilitates the removal of the nut, so that when testing the electrical housing 6 of different depths, the number of the filling blocks 5 can be increased or decreased according to actual needs. When all the filling blocks 5 are removed from the fixing rod 7, the filler can be removed from the sealing cover plate 4.

[0047] Taking into account the weight of the filler, in order to facilitate lifting and assembly, a counterweight tooling is installed on the outer side of the sealing cover plate 4, specifically including a counterweight frame 2, which is fixed on the outer side of the sealing cover plate 4, and a lifting point is provided on the counterweight frame 2, which can be connected to a lifting device 3 for crane lifting, and a counterweight mounting part is provided on the counterweight frame 2, on which a plurality of counterweight blocks 1 are assembled, and in the lateral direction, the counterweight mounting part and the sealing cover plate 4 are located on both sides of the lifting point.

[0048] During the pressure test, the electrical housing 6 is fixed and placed horizontally, a suitable number of filling blocks 5 are loaded on the fixing rod 7, the fastening nut is tightened, and the test device is hoisted and transported by a crane so that the sealing cover plate 4 blocks the open end of the electrical housing 6 to be tested for a horizontal pressure test. The other holes on the electrical housing 6 are blocked, leaving only one hole as a water injection hole 8. The solid filler enters the interior of the electrical housing 6, and water is pressurized into the electrical housing 6 through the water injection hole 8 to detect whether the electrical housing 6 is qualified.

[0049] The outer shape of the filling block can be cylindrical, disc-shaped, rectangular block, triangular block, or irregular shape. In principle, it should be convenient for manufacturing and handling.

[0050] Before the test, water medium is filled into the water filling cavity of the rigid housing. By using the incompressibility of water, the water pressure borne by the outside of the filling block can be effectively offset, reducing costs. Since the filling block has a water filling cavity, before filling with water, its mass is small, which is convenient for workers to carry and transfer.

[0051] Specific embodiment 2 of the electrical housing pressure-bearing test device provided by the present invention:

[0052] The main difference from Embodiment 1 is that in Embodiment 1, the filling block has a rigid housing and is stacked horizontally to form a filler for horizontal pressure-bearing testing. In this embodiment, as Figure 2 shown, the sealing cover plate 4 is fixedly installed upward on the support table 20, and the filler is located above the sealing cover plate 4. During use, the electrical housing 6 is hoisted by the lifting tool 3 and buckled on the sealing cover plate 4, and water is injected through the water injection hole 8 of the electrical housing 6, then vertical pressure-bearing testing can be carried out.

[0053] Moreover, in this embodiment, each filling block is a water storage bag 9. The water storage bag 9 is a flexible structure, and the inner cavity of each water storage bag 9 forms the water filling cavity of the filler. Each water storage bag 9 is provided with a water filling port 10. To facilitate the stacking of the water storage bags 9, a cage structure is provided on the inner side surface of the sealing cover plate. The cage structure extends towards the inner side of the sealing cover plate in parallel with the arrangement direction of the filling blocks, and each water storage bag is placed in the cage structure to form a filler.

[0054] Actually, the cage structure here includes three uniformly distributed fixing rods 7. The fixing rods 7 extend vertically. After stacking each water storage bag 11 inside the fixing rods in sequence, the pressing plate is sleeved on the fixing rods, and finally the fastening nut is screwed on.

[0055] Of course, in other embodiments, the cage structure can also adopt other methods, such as a four-corner cage structure.

[0056] In this embodiment, the filling block adopts a flexible water storage bag, which is less restricted by the internal structure of the electrical housing. Compared with the rigid filling block in Embodiment 1, the water storage bag has a higher degree of freedom in arrangement and is suitable for large-sized housings with complex internal structures.

[0057] Actually, for vertical pressure-bearing testing, the filling block can adopt a water storage bag or the filling block with a rigid housing in Embodiment 1.

[0058] It should be noted that during specific tests, a fixed flange will be provided on the sealing cover plate to be fixedly assembled corresponding to the connecting flange on the electrical appliance housing to be tested. The fixed flange and the connecting flange here are not shown in Figure 2 either.

[0059] Specific Embodiment 3 of the electrical appliance housing pressure-bearing test device provided by the present invention:

[0060] The difference between it and Embodiment 1 is that in Embodiment 1, the filler is composed of a plurality of filling blocks assembled together. For an electrical appliance housing with a small size, a single filler can also be provided. The filler can have one or more water filling cavities for filling a water medium to balance the external water pressure borne by the filler.

[0061] Specific Embodiment 4 of the electrical appliance housing pressure-bearing test device provided by the present invention:

[0062] The main difference between it and Embodiment 1 is that in Embodiment 1, a filler is provided inside the sealing cover plate and a counterweight frame is provided outside. In this embodiment, the counterweight frame can also be omitted, and instead, a fork arm assembly part is provided outside the sealing cover plate. The fork arm of the forklift is connected to the fork arm assembly part on the sealing cover plate, and then the sealing cover plate and the filler can be transported to the assembly position by the forklift.

[0063] In the electrical appliance housing pressure-bearing test device provided by the above embodiments, since a filler is provided inside the sealing cover plate and a water filling cavity is provided inside the filler, the injected water medium can be used to balance and offset the external water pressure of the filler, reducing costs. When the filler occupies the internal space of the electrical appliance housing and water is injected through the water injection hole on the electrical appliance housing, the test water enters between the filler and the electrical appliance housing. Since the filler will occupy most of the internal space of the electrical appliance housing to be tested, it is only necessary to inject water into the gap between the filler and the electrical appliance housing. The test water consumption is small and the water injection time is greatly shortened, thereby improving the efficiency of the pressure-bearing test.

[0064] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal electrical appliance housing pressure test device, It is characterized in that include: A sealing cover plate is used to seal the open end of the side of the housing of the electrical appliance to be tested, the sealing cover plate has an inner side surface, and at least two fixing rods are fixed on the inner side surface, and the fixing rods extend laterally toward the inner side of the sealing cover plate; The filler is formed by a plurality of filler blocks arranged in sequence in a direction perpendicular to the inner side surface of the sealing cover plate and can be assembled and disassembled. When the sealing cover plate seals the open end of the housing of the electrical appliance to be tested, the solid filler enters the housing of the electrical appliance to be tested and occupies the internal space of the housing of the electrical appliance to be tested; The filler has a water-filled cavity for filling water medium to balance the external water pressure on the filler; all filling blocks are installed on the fixing rod or stacked on the inner side of the fixing rod, and a clamping structure is detachably installed at the end of the fixing rod away from the sealing cover plate to clamp and fix all the filling blocks on the sealing cover plate.

2. The electrical appliance housing pressure test device according to claim 1, It is characterized in that Each filling block has a rigid shell, and each rigid shell has the water filling cavity and the water filling port.

3. The electrical appliance housing pressure test device according to claim 2, It is characterized in that All the fixing rods extend in parallel along the arrangement direction of the filling blocks toward the inner side of the sealing cover plate. A through hole is provided on the rigid shell of each filling block, and the through hole is separated from the water-filled cavity for the fixing rod to pass through, so that all the filling blocks are installed on the fixing rod. A clamping structure is detachably mounted at the end of the fixing rod away from the sealing cover plate to clamp and fix all the filling blocks on the sealing cover plate.

4. The electrical appliance housing pressure test device according to claim 3, It is characterized in that The clamping structure includes a pressing plate, which is provided with a through hole for the fixing rod to pass through, and the corresponding end of the fixing rod is screwed with a fastening nut, which is pressed into fit with the pressing plate so that when the fastening nut is screwed, all the filling blocks are pressed and fixed on the sealing cover plate through the pressing plate.

5. The electrical appliance housing pressure test device according to claim 1, It is characterized in that Each filling block is a water storage bag, the inner cavity of each water storage bag forms a water filling cavity of the filler, and each water storage bag is provided with a water filling port.

6. The electrical appliance housing pressure test device according to claim 5, It is characterized in that A cage structure is provided on the inner side of the sealing cover plate, and the cage structure extends toward the inner side of the sealing cover plate in parallel along the arrangement direction of the filling blocks, and each water storage bag is placed in the cage structure to form the filling.

7. An electrical housing pressure test device, It is characterized in that include: The sealing cover plate is used to seal the bottom opening end of the housing of the electrical appliance to be tested, and the sealing cover plate has an inner side surface, on which at least two fixing rods are fixed, and the fixing rods extend toward the inner side of the sealing cover plate; the electrical appliance housing is provided with a water injection hole; The filler is formed by a plurality of filler blocks arranged in sequence in a direction perpendicular to the inner side surface of the sealing cover plate and can be assembled and disassembled. When the sealing cover plate seals the open end of the housing of the electrical appliance to be tested, the solid filler enters the housing of the electrical appliance to be tested and occupies the internal space of the housing of the electrical appliance to be tested; The filler has a water-filled cavity for filling a water medium to balance the external water pressure borne by the filler; all the filling blocks are mounted on the fixing rod or stacked inside the fixing rod, and a pressing structure is detachably assembled at the end of the fixing rod away from the sealing cover plate to press and fix all the filling blocks on the sealing cover plate; The sealing cover plate is fixedly installed upward on the support platform, the filler is located above the sealing cover plate, and a lifting appliance housing is buckled on the sealing cover plate for vertical pressure-bearing testing.

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