CN113340531A - Distribution box sealing performance test device and test method - Google Patents
Distribution box sealing performance test device and test method Download PDFInfo
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- CN113340531A CN113340531A CN202110616931.4A CN202110616931A CN113340531A CN 113340531 A CN113340531 A CN 113340531A CN 202110616931 A CN202110616931 A CN 202110616931A CN 113340531 A CN113340531 A CN 113340531A
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- 238000009826 distribution Methods 0.000 title claims abstract description 70
- 238000007789 sealing Methods 0.000 title abstract description 11
- 238000011056 performance test Methods 0.000 title description 2
- 238000010998 test method Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 229920005372 Plexiglas® Polymers 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 238000007654 immersion Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a testing device and a testing method for the sealing performance of a distribution box, and relates to the technical field of electrical equipment. The device comprises a measuring cylinder, a water pressing shaft and an auxiliary shaft, wherein a fixed pulley is arranged on the inner surface of the measuring cylinder, a driving roller is arranged on the surface of the water pressing shaft, a supporting wheel is arranged on the peripheral side surface of the auxiliary shaft, and the supporting wheel, the driving roller, the fixed pulley and a traction steel cable form a pulley block structure. The principle of the change of the volume of water discharged before and after the distribution box is soaked is utilized, so that the internal water seepage condition of the sealed distribution box after the distribution box is completely soaked can be conveniently determined; the driving roller, the supporting wheel and the fixed pulley are arranged, the traction steel cable is used for connection to form a pulley block structure, and the traction steel cable is used for bolting the fixed frame, so that the distribution box can be pulled below the water surface of the measuring cylinder to simulate the immersion state of the distribution box; through the fixed frame that utilizes a plurality of mounting panels to assemble, the fixed frame of being convenient for determines the size of volume according to specific block terminal specification, and can reduce the error that appears in the block terminal leakproofness testing process.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a testing device and a testing method for the tightness of a distribution box.
Background
Common distribution boxes are mostly used outdoors, so that the distribution boxes can be often operated in various climatic environments to utilize rainy and snowy weather; a large number of electrical elements and cables are arranged in the distribution box, and when the distribution box is filled with water during working, internal cable lines can be short-circuited, distribution box equipment is damaged, and a series of safety problems are caused; also, a qualified electrical box should have good sealing properties to enable blocking water from entering the interior of the electrical box and damaging internal components in rainy and snowy weather;
a detection device and a detection method for the tightness of the existing distribution box are usually lacked in the existing distribution box production line, and the finished product of the distribution box is difficult to perform nondestructive detection in a sealed state.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for the tightness of a distribution box, and solves the problems that the existing distribution box production line lacks tightness detection equipment and a method and the distribution box is difficult to detect.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a distribution box tightness test device which comprises a measuring cylinder, a water pressing shaft and auxiliary shafts, wherein the inner surface of the measuring cylinder is connected with the water pressing shaft through a bearing, the inner surface of the measuring cylinder is welded with a plurality of auxiliary shafts, the auxiliary shafts are positioned above the water pressing shaft, and the water pressing shaft is in rotating fit with the measuring cylinder;
the circumferential side surface of the water pressing shaft is welded with a driving roller, the circumferential side surface of the driving roller is wound with a traction steel cable, and a fixing frame is bolted between two opposite ends of the traction steel cable; the peripheral side surface of the auxiliary shaft is connected with supporting wheels through bearings, and the traction steel cable is wound and matched with the supporting wheels;
the inner surface of the measuring cylinder is connected with a pulley yoke in a bolted mode, the inner surface of the pulley yoke is connected with a fixed pulley in a bolted mode, the traction steel cable penetrates through the pulley yoke and is in contact fit with the fixed pulley, and the traction steel cable, the fixed pulley, the driving roller and the supporting wheel form a pulley block structure.
Furthermore, a measuring groove is formed in the outer side face of the measuring cylinder, an observation plate is bonded to the inner surface of the measuring groove, the observation plate is an organic glass plate, a plurality of scale grooves are formed in one surface of the observation plate, and the liquid level change in the measuring cylinder is observed through the transparent organic glass plate.
Furthermore, the bottom surface of the measuring cylinder is bolted with a driving motor, and one end face of the water pressing shaft extends to the outside of the measuring cylinder and is bolted with an output shaft of the driving motor.
Furthermore, the fixed frame is of a cubic frame structure, the two opposite ends of the traction steel cable are bolted to the top corners of the fixed frame, the two top corners of the fixed frame, which are bolted to the traction steel cable, are located on the diagonal line of the fixed frame, and the resistance of water, which is used for drawing the fixed frame, to the fixed frame is reduced to the minimum.
Further, fixed frame includes a plurality of mounting panels, a mounting panel surface adhesion has a plurality of installation slots, the side adhesion has a plurality of installation cuttings around the mounting panel, adjacent two peg graft each other through installation slot and installation cuttings between the mounting panel, the equipment and the dismantlement of fixed frame of being convenient for are favorable to the block terminal of fixed frame adaptation different specifications.
Furthermore, a plurality of meshes are formed in one surface of each mounting plate, and the traction steel cable is bolted to the three adjacent mounting plates through the meshes.
A method for testing the tightness of a distribution box comprises the following steps:
placing a distribution box to be detected on the surface of an installation slot of one installation plate, sequentially inserting the other installation plates close to the contour of the peripheral side surface of the distribution box, measuring and calculating the volume V1 of the fixed frame, namely the volume of the distribution box, and directly measuring the side length of each side by using a measuring tool such as a tape measure and the like to obtain V1;
winding the installation mode of the traction steel cable installation pulley block among the driving roller, the supporting wheel and the fixed pulley, injecting water into the measuring cylinder, wherein the liquid level of the injected water is over the fixed pulley, recording the height H1 of the liquid level, and calculating the volume of the fixed pulley to avoid errors;
thirdly, bolting the traction steel cable to the opposite vertex angle of the assembled fixed frame without the distribution box, enabling the fixed frame to be positioned above the liquid level, then starting the driving motor, pulling the fixed frame to enable the liquid level to be submerged over the upper vertex of the fixed frame, and recording the height H2 of the liquid level, wherein H2 is the volume sum of each mounting plate of the fixed frame;
step four, placing the distribution box to be detected inside the fixed frame, repeating the operation of the step two and the operation of the step three, and respectively recording the liquid level heights H3 and H4 before and after the fixed frame is soaked with water, wherein H3 is equal to H1, and H4 is the sum of the volume and the water seepage volume of the distribution box after H2 and the distribution box are soaked with water;
step five, solving the volume change V2 of water when the distribution box is immersed in water according to the known bottom area S in the measuring cylinder 1 and the liquid level heights H1, H2, H3 and H4 of four times, and then solving the difference C between V1 and V2, namely the water seepage amount of the distribution box; wherein the calculation formula is as follows:
V2＝S×(H4-H3-H2-H1)；
C＝V2-V1；
when C is larger than 0, the sealing performance of the distribution box is poor, and water can permeate; when C ═ 0, it indicates that the sealing properties of the distribution box are good, i.e., complete sealing.
The invention has the following beneficial effects:
the invention utilizes the principle of the change of the volume of the water discharged before and after the distribution box is soaked, and is convenient to determine the water seepage condition of the completely sealed distribution box after the distribution box is completely soaked; the driving roller, the supporting wheel and the fixed pulley are arranged, the traction steel cable is used for connection to form a pulley block structure, the traction steel cable is used for bolting a fixed frame for placing a distribution box, and the distribution box can be pulled below the water surface of the measuring cylinder to simulate the immersion state of the distribution box; in addition, through the fixed frame that utilizes a plurality of mounting panels to assemble, the fixed frame of being convenient for is according to specific block terminal specification and is confirmed the volume size, and can reduce the error that appears in the block terminal leakproofness testing process.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of a tightness testing device for a distribution box according to the present invention;
FIG. 2 is a top view of a block terminal seal test apparatus of the present invention;
FIG. 3 is a schematic structural view of section A-A in FIG. 2;
FIG. 4 is a schematic structural diagram of a mounting plate of the testing apparatus for tightness of distribution box according to the present invention;
fig. 5 is a block diagram of a method for testing the sealing performance of a distribution box according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a measuring cylinder; 2. a water pressing shaft; 3. an auxiliary shaft; 201. a drive roller; 202. pulling the steel cable; 203. a fixing frame; 301. a support wheel; 101. a pulley yoke; 1011. a fixed pulley; 102. a measuring tank; 1021. an observation plate; 1022. a scale groove; 103. a drive motor; 2031. mounting a plate; 2032. installing a slot; 2033. installing the cutting; 2034. and (4) meshes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, the invention relates to a distribution box tightness test device, which comprises a measuring cylinder 1, a water pressing shaft 2 and auxiliary shafts 3, wherein the inner surface of the measuring cylinder 1 is connected with the water pressing shaft 2 through a bearing, the inner surface of the measuring cylinder 1 is welded with a plurality of auxiliary shafts 3, the auxiliary shafts 3 are positioned above the water pressing shaft 2, and the water pressing shaft 2 is in rotating fit with the measuring cylinder 1;
a driving roller 201 is welded on the circumferential side surface of the water pressing shaft 2, a pulling steel cable 202 is wound on the circumferential side surface of the driving roller 201, and a fixing frame 203 is bolted between two opposite ends of the pulling steel cable 202; the peripheral side surface of the auxiliary shaft 3 is connected with a supporting wheel 301 through a bearing, and the traction steel cable 202 is wound and matched with the supporting wheels 301;
the pulley yoke 101 is bolted on the inner surface of the measuring cylinder 1, the fixed pulley 1011 is bolted on the inner surface of the pulley yoke 101, the traction steel cable 202 passes through the pulley yoke 101 and is in contact fit with the fixed pulley 1011, namely the traction steel cable 202, the fixed pulley 1011, the driving roller 201 and the supporting wheel 301 form a pulley block structure.
Preferably, the outer side surface of the measuring cylinder 1 is provided with a measuring groove 102, the inner surface of the measuring groove 102 is adhered with an observation plate 1021, the observation plate 1021 is an organic glass plate, one surface of the observation plate 1021 is provided with a plurality of scale grooves 1022, and the liquid level change in the measuring cylinder 1 is observed through the transparent organic glass plate.
Preferably, the bottom surface of the measuring cylinder 1 is bolted with a driving motor 103, and one end surface of the water pressing shaft 2 extends to the outside of the measuring cylinder 1 and is bolted with an output shaft of the driving motor 103.
Preferably, the fixed frame 203 is a cubic frame structure, opposite ends of the pulling cable 202 are bolted to the top corners of the fixed frame 203, and the top corners of the fixed frame 203 where the pulling cable 202 is bolted are located on the body diagonal of the fixed frame 203, so that the resistance of the pulling fixed frame 203 to the fixed frame by water is minimized.
Preferably, the fixed frame 203 includes a plurality of mounting panels 2031, and a surface of the mounting panel 2031 is adhered with a plurality of mounting slots 2032, and the side surface of the mounting panel 2031 is adhered with a plurality of mounting inserts 2033, and is inserted with the mounting inserts 2033 through the mounting slots 2032 between two adjacent mounting panels 2031, so that the fixed frame 203 is convenient to assemble and disassemble, and the fixed frame is favorable for adapting to distribution boxes with different specifications.
Preferably, the mounting plate 2031 has a plurality of holes 2034 formed in one surface thereof, and the pull cable 202 is bolted to the adjacent three mounting plates 2031 through the holes 2034.
Example 1:
a method for testing the tightness of a distribution box comprises the following steps:
firstly, placing a distribution box to be detected on the surface of an installation slot 2032 of an installation plate 2031, sequentially splicing the rest installation plates 2031 tightly attached to the profile of the peripheral side of the distribution box, measuring and calculating the volume V1 of the fixed frame 203, namely the volume of the distribution box, and directly measuring the side length of each side by using a measuring tool such as a tape measure and the like to calculate V1;
step two, winding the installation mode of installing the pulley block on the traction steel cable 202 among the driving roller 201, the supporting wheel 301 and the fixed pulley 1011, injecting water into the measuring cylinder 1, wherein the liquid level of the injected water is over the fixed pulley 1011, recording the liquid level height H1, and calculating the volume of the fixed pulley 1011 to avoid errors;
step three, bolting the pulling steel cable 202 to the body opposite vertex angle of the assembled fixed frame 203 without the distribution box, enabling the fixed frame 203 to be positioned above the liquid level, then starting the driving motor 103, pulling the fixed frame 203 to enable the liquid level to be over the top point of the fixed frame 203, and recording the liquid level height H2, wherein H2 is the volume sum of each mounting plate 2031 of the fixed frame 203;
step four, placing the distribution box to be detected inside the fixed frame 203, repeating the operation of the step two and the operation of the step three, and respectively recording the liquid level heights H3 and H4 before and after the fixed frame 203 is soaked with water, wherein H3 is equal to H1, and H4 is the sum of the volume and the water seepage volume of the distribution box after H2 and the distribution box are soaked with water;
step five, solving the volume change V2 of water when the distribution box is immersed in water according to the known bottom area S in the measuring cylinder 1 and the liquid level heights H1, H2, H3 and H4 of four times, and then solving the difference C between V1 and V2, namely the water seepage amount of the distribution box; wherein the calculation formula is as follows:
V2＝S×(H4-H3-H2-H1)；
C＝V2-V1；
when C is larger than 0, the sealing performance of the distribution box is poor, and water can permeate; when C is 0, the sealing performance of the distribution box is good, namely complete sealing is realized;
example 2:
it should be further noted that, in the present invention, the driving motor 103 is a FJ86S280a50 type hybrid stepping motor, and in actual operation, when the pulling cable 202 is bolted to the body diagonal corner of the fixed frame 203, buoyancy of water to the distribution box and the fixed frame 203 can be reduced to the maximum extent when the distribution box is pulled down, and kinetic energy of the driving motor 103 can be saved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a block terminal leakproofness test device, includes a measuring section of thick bamboo (1), pressurized-water shaft (2) and auxiliary shaft (3), its characterized in that: the inner surface of the measuring cylinder (1) is connected with the water pressing shaft (2) through a bearing, the inner surface of the measuring cylinder (1) is welded with a plurality of auxiliary shafts (3), the auxiliary shafts (3) are positioned above the water pressing shaft (2), and the water pressing shaft (2) is in rotating fit with the measuring cylinder (1);
a driving roller (201) is welded on the circumferential side surface of the water pressing shaft (2), a traction steel cable (202) is wound on the circumferential side surface of the driving roller (201), and a fixing frame (203) is bolted between two opposite ends of the traction steel cable (202); the peripheral side surface of the auxiliary shaft (3) is connected with supporting wheels (301) through bearings, and the traction steel cable (202) is wound and matched with the supporting wheels (301);
the inner surface of the measuring cylinder (1) is bolted with a pulley yoke (101), the inner surface of the pulley yoke (101) is bolted with a fixed pulley (1011), and the traction steel cable (202) penetrates through the pulley yoke (101) and is in contact fit with the fixed pulley (1011).
2. The tightness test device for the distribution box according to claim 1, wherein a measuring groove (102) is formed in the outer side surface of the measuring cylinder (1), an observation plate (1021) is adhered to the inner surface of the measuring groove (102), the observation plate (1021) is a plexiglass plate, and a plurality of scale grooves (1022) are formed in one surface of the observation plate.
3. The electric box tightness test device according to claim 1, wherein a driving motor (103) is bolted to the bottom surface of the measuring cylinder (1), and one end face of the water pressing shaft (2) extends to the outside of the measuring cylinder (1) and is bolted to an output shaft of the driving motor (103).
4. The distribution box tightness test device according to claim 1, wherein the fixing frame (203) is a cubic frame structure, opposite ends of the pulling steel cable (202) are bolted to top corners of the fixing frame (203), and the top corners of the fixing frame (203) where the pulling steel cable (202) is bolted are located on body diagonal lines of the fixing frame (203).
5. The distribution box tightness test device according to claim 4, wherein the fixing frame (203) comprises a plurality of mounting plates (2031), a plurality of mounting slots (2032) are bonded to one surface of each mounting plate (2031), a plurality of mounting inserts (2033) are bonded to the circumferential side of each mounting plate (2031), and two adjacent mounting plates (2031) are mutually inserted through the mounting slots (2032) and the mounting inserts (2033).
6. The tightness test device of the distribution box according to claim 5, characterized in that a plurality of meshes (2034) are formed on one surface of the mounting plate (2031), and the pulling cable (202) is bolted to the adjacent three mounting plates (2031) through the meshes (2034).
7. A method for testing the tightness of a distribution box is characterized by comprising the following steps:
placing a distribution box to be detected on the surface of an installation slot (2032) of an installation plate (2031), sequentially inserting the rest installation plates (2031) close to the contour of the peripheral side surface of the distribution box, and measuring and calculating the volume V1 of the fixing frame (203), namely the volume of the distribution box;
secondly, winding the installation mode of installing a pulley block on the traction steel cable (202) among the driving roller (201), the supporting wheel (301) and the fixed pulley (1011), injecting water into the measuring cylinder (1), wherein the liquid level of the injected water is over the fixed pulley (1011), and recording the liquid level height H1;
step three, bolting a traction steel cable (202) to the body opposite vertex angle of a fixed frame (203) which is assembled and is not provided with a distribution box, enabling the fixed frame (203) to be located above the liquid level, then starting a driving motor (103), pulling the fixed frame (203) to enable the liquid level to be over the top point of the fixed frame (203), and recording the liquid level height H2;
step four, placing the distribution box to be detected in the fixed frame (203), repeating the operation of the step two and the operation of the step three, and respectively recording the liquid level heights H3 and H4 before and after the fixed frame (203) is flooded;
step five, solving the volume change V2 of water when the distribution box is immersed in water according to the known inner bottom area S of the measuring cylinder (1) and the liquid level heights H1, H2, H3 and H4 of four times, and then solving the difference C between V1 and V2, namely the water seepage amount of the distribution box; wherein the calculation formula is as follows:
V2＝S×(H4-H3-H2-H1)；
C＝V2-V1。
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| CN202110616931.4A CN113340531B (en) | 2021-06-03 | 2021-06-03 | Distribution box sealing performance test device and test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116659764A (en) * | 2023-07-26 | 2023-08-29 | 山东省阳信根深电气有限公司 | Device and method for tightness test of distribution box |
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| CN113340531B (en) | 2022-11-22 |
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