CN210326867U - Cable junction box for low-voltage generator test - Google Patents
Cable junction box for low-voltage generator test Download PDFInfo
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- CN210326867U CN210326867U CN201921545795.9U CN201921545795U CN210326867U CN 210326867 U CN210326867 U CN 210326867U CN 201921545795 U CN201921545795 U CN 201921545795U CN 210326867 U CN210326867 U CN 210326867U
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Abstract
The utility model discloses a cable confluence hanging wire box for low-voltage generator test, including bottom plate, insulation board, 24 hanging wire bolts and protection casing. The bottom plate is a rectangular plate with a hollow middle part, and a guide rail is respectively arranged at the edge close to two sides; the insulating plate is fixed in the middle of the surface of the bottom plate and is provided with three rows of threaded holes, and the number of each row of threaded holes is 8; the 24 wire hanging bolts are correspondingly arranged in the 24 threaded holes in a one-to-one mode in which the screw heads are positioned on the back surface of the insulating plate; a straight through groove is formed in the front end face of each wire hanging bolt, and an anti-falling pin is hinged in the through groove through a pin shaft; the protective cover is a rectangular cover body with an opening at the lower end, the rear ends of the left side plate and the right side plate are respectively flanged outwards, and a plurality of sliding blocks are arranged on the bottom surface of the flanged edge at intervals, so that the protective cover can be arranged on the guide rail of the bottom plate in a vertically moving mode. The utility model discloses a hang line box can simplify the mode of connection of cable, the repeated connection number of times that cable joint in the experimental operation that has significantly reduced.
Description
Technical Field
The utility model relates to a generator is experimental with device, concretely relates to cable busbar hanging wire box is experimental with low voltage generator.
Background
When the low-voltage generator is prepared for an experiment, one end of the cable is firstly connected to a three-phase (A, B, C) wiring terminal of a generator wiring terminal (called end A for short), and the other end of the cable is directly connected to a copper busbar box wiring terminal of a load end (called end B for short) (as shown in figure 1).
At present, the domestic motor cable wiring mode is as follows: the connection method shown in fig. 1 is that cables at two ends AB are connected during the test, and after the test is finished, fastening bolts are loosened at two ends of each cable, so that the cables at two ends AB are completely disconnected.
In the past, the power of a single generator was not very large, typically below 1000 KW. However, with the innovation of motor technology and the continuous improvement of manufacturing capability, the demand of standby power generation of buildings or office buildings is increased, the large-scale construction of data centers and the like, a single generator of about 2000KW is widely applied at present. Just because the power of a single generator is increasingly large, according to a calculation formula of the current of a main stator of the generator: i ═ P/(√ 3Ucos φ), as the power P increases, the corresponding output current I increases. When the output current of the generator is increased, the number of cables required to be connected in the experiment is more, and the experiment can be understood by referring to the following three examples.
Example 1: when testing a 400V-50Hz-1000KW three-phase generator, 4 185mm of power are needed to be connected to each phase2Due to the symmetrical load, the single-core cable needs to be connected with 12 cables (3 × 4-12 cables).
Example 2: when testing a 400V-50Hz-2000KW three-phase generator, it is necessary to connect 9 185mm electrodes to each phase2Due to the symmetrical load, the single core cable needs to be connected with 27 cables (3 × 9 ═ 27 cables).
Example 3: when testing a 400V-50Hz-3000KW three-phase generator, it is necessary to attach 14 185mm of power to each phase2Due to the symmetrical load, the single-core cable needs to be connected with (3 × 14-42) 42 cables in total.
From the three examples, we can see that the cable connection during the low-voltage generator experiment is characterized in that:
1. the number of cable connections is large, and the number of cable connection copper nose joints is large.
2. The cable joint fastening uses many bolts and has high labor intensity.
3. The two ends of the AB must be connected during the experiment, and must be disconnected after the experiment, so that the repeated work is more.
4. And (3) repeating the step (3) when the experiment of one generator is finished and another generator is carried out.
By combining the wiring method and the connection characteristics of the existing cable, when the generator is tested, the cable connection method shown in fig. 1 has the defects of more repeated work, high labor intensity, low efficiency, waste of a large amount of labor cost and unsuitability for mass production test operation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a cable busbar hanging box for low-voltage generator is experimental, it can simplify the mode of connection of cable, the repeated connection number of times of cable joint in the experimental operation that has significantly reduced to the operating efficiency has been improved.
The purpose of the utility model is realized like this: a cable confluence hanging box for a low-voltage generator test comprises a bottom plate, an insulating plate, 24 hanging wire bolts and a protective cover, wherein,
the bottom plate is a rectangular plate with a hollow middle part, and guide rails are respectively arranged on the surface of the bottom plate and close to the edges of two sides;
the area of the insulating plate is matched with the hollow area of the bottom plate and is fixed in the middle of the surface of the bottom plate, three rows of threaded holes are formed in the insulating plate, and the number of each row of threaded holes is 8;
the 24 hanging wire bolts are correspondingly arranged in 24 threaded holes in the insulating plate in a one-to-one manner in such a way that the screw heads are positioned on the back surface of the insulating plate, and the length of each hanging wire bolt is at least greater than the diameter of each cable; a straight through groove is formed in the front end face of each wire hanging bolt, a pin hole is coaxially formed in two side walls of each through groove, and an anti-falling pin is hinged in each through groove through a pin shaft;
the protective cover comprises a left side plate, a right side plate, a panel connected between the front ends of the left side plate and the right side plate, and a top plate connected between the top ends of the left side plate and the right side plate and the top end of the panel, so that a rectangular cover body with an opening at the lower end is formed; the rear ends of the left side plate and the right side plate are respectively flanged outwards, and a plurality of sliding blocks are arranged on the bottom surfaces of the flanges at intervals, so that the protective cover can be arranged on the guide rail of the bottom plate in a vertically moving mode.
The cable bus hanging box for the low-voltage generator test is characterized in that the insulating plate is a bakelite plate.
The cable bus hanging box for the low-voltage generator test is characterized in that the protective cover is made of colorless and transparent insulating materials.
The utility model discloses a cable busbar hanging box for low-voltage generator test has following characteristics:
1. when the generator is tested, only the cable on the generator side needs to be connected, after the test is finished, the cable on the generator side only needs to be broken, the cable on the load side does not need to be broken, the complexity is reduced, the repeated wiring times of the cable are greatly reduced, and the operation efficiency is improved.
2. The generators in all power sections in the maximum power range only need to take cables suitable for current-carrying capacity from the wire hanging box to be connected with the generators, and cables on the load side do not need to be concerned and connected, so that the labor intensity of operation is greatly reduced.
3. The hanging wire bolt with the rotary pin is adopted, the hanging wire and the taking wire on the hanging wire box are very convenient and flexible, the hanging wire and the taking wire function of the bolt and the nut adopted by the traditional hanging wire box are replaced, and time and labor are saved.
Drawings
FIG. 1 is a schematic diagram of the cabling during generator testing;
FIG. 2 is a schematic structural view of a cable bus box for testing a low-voltage generator according to the present invention;
FIG. 3 is a layout structure diagram of the hanging bolts on the cable bus hanging box of the present invention;
fig. 4 is a schematic structural view of a wire hanging bolt in the cable bus hanging box of the present invention;
FIG. 5 is a schematic diagram of the cable junction box according to the present invention during the generator test;
fig. 6 is a schematic structural view of the cable lug being hung on the hanging bolt of the cable bus hanging box of the present invention;
fig. 7 is the utility model discloses a hanging wire bolt of cable bus hanging box has hung the structural schematic diagram of two cable copper noses.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 7, the cable bus hanging box for testing a low voltage generator of the present invention comprises a bottom plate 1, an insulating plate 2, 24 hanging bolts 3 and a protective cover 4, wherein,
the bottom plate 1 is a rectangular plate with a hollow middle part, and a guide rail 10 is respectively arranged on the surface of the bottom plate 1 and close to the edges of two sides;
the insulating plate 2 is a rectangular bakelite plate 2 with the area slightly larger than the hollow area of the bottom plate 1, the insulating plate is fixed in the middle of the surface of the bottom plate 1, three rows of threaded holes are formed in the insulating plate 2, the number of each row of threaded holes is 8, and the number of the threaded holes is 24;
the 24 wire hanging bolts 3 are correspondingly arranged in 24 threaded holes in the insulating plate in a one-to-one mode in which screw heads are positioned on the back surface of the insulating plate 2, and the 8 wire hanging bolts 3 in the uppermost row are used as wire hanging ends of the A-phase cable and are numbered as 1-8; a row of 8 wire hanging bolts 3 in the middle are used as wire hanging ends of the B-phase cable and are numbered as 9-16; the 8 lowest rows of the hanging bolts 3 are used as hanging ends of the C-phase cable and are numbered as 17-24;
the length of each wire hanging bolt 3 is at least larger than the diameters of two cables, so that each wire hanging bolt 3 can hang two cables, and 48 cables can be hung on the wire hanging box;
a straight through groove is formed in the front end face of each wire hanging bolt 3, a pin hole is coaxially formed in two side walls of each through groove, an anti-falling pin 30 is hinged in each through groove through a pin shaft, and the anti-falling pin 30 can freely rotate around the pin shaft within a range of 90 degrees;
the protective cover 4 is made of colorless and transparent insulating materials, the protective cover 4 comprises a left side plate, a right side plate, a panel connected between the front ends of the left side plate and the right side plate and a top plate connected between the top ends of the left side plate and the right side plate and the top end of the panel, and a rectangular cover body with an opening at the lower end is formed; the rear ends of the left and right side plates are also respectively flanged outwards, and a plurality of sliding blocks 40 are arranged on the bottom surfaces of the flanges at intervals, so that the protective cover 4 can be arranged on the guide rail 10 of the bottom plate 1 in a way of moving up and down.
Adopted the utility model discloses a cable junction box is used in low voltage generator test, the wiring principle of cable is shown as figure 5 when the generator experiment. The cable at the end B of the load side is always in a connected state, and when no generator experiment is carried out, the other end of the cable is always in a wire hanging state, namely is hung on a wire hanging box, such as the end C marked in figure 5. The wire hanging box is provided with 24 wire hanging bolts 3, each wire hanging bolt 3 can hang 2 in-phase cables, and therefore 48 cables can be hung on the wire hanging box in total. The 48 cables are normally connected to the B-side and suspended from the C-side. When the generator needs to be tested, the cables with proper quantity are taken down from the wire hanging box according to the power of the generator and connected to the end A of the generator. After the experiment is finished, the cable is detached from the end A and then hung back to the end C of the junction box. When the next generator needs to be tested, the above process is repeated.
When the cable needs to be hung on the wire hanging box, the anti-falling pin 30 is rotated to a position which forms an angle of 0 degree with the wire hanging bolt 3, and at the moment, the screw hole on the cable copper nose 5 can be sleeved in the rotating pin 30 and hung on the wire hanging bolt 3 (see figure 6). When the cable copper nose 5 moves to the position of the wire hanging bolt 3, the anti-dropping pin 30 is dropped, so that the anti-dropping pin 30 freely drops under the action of gravity to form a 90-degree vertical position with the wire hanging bolt 3, and thus, the outlet of the cable copper nose 5 is firmly locked, and the cable copper nose 5 cannot drop from the wire hanging bolt 3 (see fig. 7). When the suspended cable copper nose 5 needs to be connected to the end A of the generator, the anti-drop pin 30 is rotated to the position which forms an angle of 0 degree with the wire hanging bolt 3 again, and the cable copper nose 5 suspended on the wire hanging bolt 3 can be taken out easily.
After the cable in the wire hanging box is hung, the protective cover 4 moves downwards along the guide rail 10 to completely cover the exposed metal part of the cable, and plays a role in isolating the electrified cable copper nose 5 and insulation. When the generator is shut down, under the condition of no electricity, when needing to take off the cable copper nose 5 that hangs and rewire, move the protection casing 4 up along guide rail 10, make protection casing 4 withdraw from and cover, at this moment, the operator just can conveniently take off the cable copper nose 5 that hangs, carries out the wiring operation of cable. After the wiring is finished, the protective cover 4 is moved downwards along the guide rail 10 again to cover the redundant cable copper noses 5 which are not required to be removed. Through transparent protection casing 4, can observe easily whether cable copper nose 5 on the hanging wire box is in good suspended state, can also allow cable copper nose 5 in the hanging wire box electrified.
Used the utility model discloses a behind the string box, when the generator experiment, only need connect the A end cable of generator side can, after the experiment, as long as the A end cable of disconnected development motor side, need not the B end cable of disconnection load side. This is particularly true for cable connections of a high power generator, such as: 3000KW motor needs to be connected with 14 pieces of 185mm each time2The total number of cables required to be connected is 42. If according to the traditional connection method, 1 cable 1 is connected for 1 time, 168 times of connection are carried out before and after the experiment, and the experiment of a 3000KW generator can be completed only by 84 times of connection after improvement. Therefore, the utility model discloses a behind the hanging wire box, improved the mode of connection, reduced the repeated wiring number of times of cable widely, improved the operating efficiency.
The utility model discloses a hanging box always is in with the biggest 3000KW low voltage generator test ability come the hanging wire and the wiring, that is to say the cable of load side always is in maximum power's connected state, and the cable of same hanging box department always is in maximum power's hanging wire state, hangs 48 cables altogether. During the experiment, the load side does not need to carry out wiring operation, and the generator side needs to connect a plurality of cables from the wire hanging box. And redundant cables which are not used on the wire hanging box are always in a wire hanging suspension state. For example, after the experiment of a 2000KW generator is finished, when a 1000KW low power generator is tested subsequently, the rated current is reduced, and the number of cable connections required for the experiment is significantly less than that of the 2000KW generator. Traditionally, the two ends of the redundant cable are removed, a cable suitable for 1000KW is left, and finally the two ends of the cable are wired. If a 3000KW high-power generator is tested subsequently, the rated current is increased, the number of cable connections required by the experiment is obviously larger than that of 2000KW generators, and the conventional method is that cables required by manual supplementation are required, and after the supplementation is finished, two ends of the cables need to be connected again. Use the utility model discloses a behind the hanging wire box, at the generator of all power sections of maximum power within range, only need from the hanging wire box take the cable connection that is fit for the current-carrying capacity can, need not to pay close attention to again and connect the cable of load side to greatly reduced the intensity of labour of operation, reduced the cable junction of many repetitiveness.
Traditional string box uses bolt and nut to connect, must unscrew the nut and take off when getting the line from string box, must install the nut on the bolt after hanging the line. The utility model adopts the hanging wire bolt with the rotary anti-drop pin without nut fastening to hang the cable easily; after the cable is hung, the cable can be firmly locked on the wire hanging box and cannot fall off due to the blocking of the anti-falling pin. Therefore, the thread-hanging bolt with the rotary anti-dropping pin can replace the thread-hanging and thread-taking functions of the bolt and the nut, and is time-saving, labor-saving, simple, easy to use, very convenient and flexible.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (3)
1. A cable confluence hanging box for a low-voltage generator test comprises a bottom plate, an insulating plate, 24 hanging line bolts and a protective cover, and is characterized in that,
the bottom plate is a rectangular plate with a hollow middle part, and guide rails are respectively arranged on the surface of the bottom plate and close to the edges of two sides;
the area of the insulating plate is matched with the hollow area of the bottom plate and is fixed in the middle of the surface of the bottom plate, three rows of threaded holes are formed in the insulating plate, and the number of each row of threaded holes is 8;
the 24 hanging wire bolts are correspondingly arranged in 24 threaded holes in the insulating plate in a one-to-one manner in such a way that the screw heads are positioned on the back surface of the insulating plate, and the length of each hanging wire bolt is at least greater than the diameter of each cable; a straight through groove is formed in the front end face of each wire hanging bolt, a pin hole is coaxially formed in two side walls of each through groove, and an anti-falling pin is hinged in each through groove through a pin shaft;
the protective cover comprises a left side plate, a right side plate, a panel connected between the front ends of the left side plate and the right side plate, and a top plate connected between the top ends of the left side plate and the right side plate and the top end of the panel, so that a rectangular cover body with an opening at the lower end is formed; the rear ends of the left side plate and the right side plate are respectively flanged outwards, and a plurality of sliding blocks are arranged on the bottom surfaces of the flanges at intervals, so that the protective cover can be arranged on the guide rail of the bottom plate in a vertically moving mode.
2. The cable bus bar box for low-voltage generator test as claimed in claim 1, wherein the insulating plate is a bakelite plate.
3. The cable bus box for testing a low-voltage generator according to claim 1, wherein the protective cover is made of a colorless and transparent insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545795.9U CN210326867U (en) | 2019-09-17 | 2019-09-17 | Cable junction box for low-voltage generator test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545795.9U CN210326867U (en) | 2019-09-17 | 2019-09-17 | Cable junction box for low-voltage generator test |
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| Publication Number | Publication Date |
|---|---|
| CN210326867U true CN210326867U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921545795.9U Active CN210326867U (en) | 2019-09-17 | 2019-09-17 | Cable junction box for low-voltage generator test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607979A (en) * | 2021-09-30 | 2021-11-05 | 深圳市飞霞机电技术有限公司 | Continuous power distribution cabinet electrical variable measuring equipment |
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2019
- 2019-09-17 CN CN201921545795.9U patent/CN210326867U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607979A (en) * | 2021-09-30 | 2021-11-05 | 深圳市飞霞机电技术有限公司 | Continuous power distribution cabinet electrical variable measuring equipment |
| CN113607979B (en) * | 2021-09-30 | 2021-12-17 | 深圳市飞霞机电技术有限公司 | Continuous power distribution cabinet electrical variable measuring equipment |
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