CN114530858B - Quick pressure regulating system of coal mine excavation site overhead line - Google Patents
Quick pressure regulating system of coal mine excavation site overhead line Download PDFInfo
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- CN114530858B CN114530858B CN202210187758.5A CN202210187758A CN114530858B CN 114530858 B CN114530858 B CN 114530858B CN 202210187758 A CN202210187758 A CN 202210187758A CN 114530858 B CN114530858 B CN 114530858B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 44
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 238000009412 basement excavation Methods 0.000 title claims description 4
- 239000004020 conductor Substances 0.000 claims description 42
- 230000001012 protector Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 22
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000000605 extraction Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Cable Accessories (AREA)
Abstract
The application discloses a rapid pressure regulating system for an overhead line of a coal mine mining field, which comprises a regulating unit, an energy supply unit and a connecting unit, wherein the regulating unit comprises a compensating transformer connected to a bus, a bypass power supply connected to the input end of the compensating transformer, and a power unit cabinet connected to the input end of the bypass power supply, and the input end of the compensating transformer is connected with a current transformer; the energy supply unit comprises an energy supply transformer connected between the bus and the power unit cabinet and a circuit breaker connected to the output end of the energy supply transformer; a connection unit; the voltage regulating system can stabilize load voltage and eliminate three-phase unbalance of system voltage; the system stability and the power transmission capability can be improved; the electric energy quality problems such as power grid voltage fluctuation, voltage harmonic waves and the like can be eliminated; the response speed is high, the operation range is wide, and the voltage stability can be ensured at any time; the power unit fault can automatically switch the bypass operation state, and the continuity of the power supply of the later stage is ensured.
Description
Technical Field
The application relates to the technical field of distribution line voltage regulation, in particular to a rapid pressure regulation system for an overhead line of a coal mine mining field.
Background
The open pit coal mine mining field takes a 35kV overhead annular pit line as a main trunk, the 35/6.3kV mobile substation annular pit is arranged, and 6kV cable lines fed out by the substation distribute power to each mining and stripping working platform excavator, so that the upper power supply of a 35kV power distribution system is unstable (the voltage fluctuation range is 33500V-37500V). The large-scale coal mine excavator is provided with a variable frequency control system, and the sensitivity degree to a power supply is particularly high, for example: the WK-20 excavator adopts a Siemens AC-DC-AC variable frequency control system, network voltage directly acts on power electronic devices, and the excessive high and low voltages can cause the burning of a PLC secondary control element. The normal operation of the large-scale coal mine excavator needs to be ensured by a stable power supply.
The prior art has the defects or shortages that: 1. the tapping switch of the 35/6.3kV mobile substation is adjusted to cut off the power of the substation, and a preventive test is required to be carried out on the transformer after adjustment, so that the power supply continuity is affected; 2. frequent adjustment of the tapping switch of the 35/6.3kV mobile substation can increase the resistance of a poor contact point, heat is generated and huge, the temperature is increased due to long time, a winding can be possibly blown, and meanwhile, the loss of a transformer is increased. In addition, when the adjustment and compensation is performed from the overhead line, there are problems of connection stability and safety in connection between the bus bar and the branch line, and therefore, it is necessary to solve the problems.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The application is provided in view of the problems of the pressure regulation of the overhead line of the existing coal mine mining field.
Therefore, the application aims to provide a rapid voltage regulating system for an overhead line of a coal mine mining field, which aims to solve the problems that a power supply of a power distribution system in the overhead line of the coal mine mining field is unstable and the wiring between the voltage regulating system and a bus is difficult.
In order to solve the technical problems, the application provides the following technical scheme: the rapid pressure regulating system comprises a regulating unit, an energy supply unit and a connecting unit, wherein the regulating unit comprises a compensation transformer connected to a bus, a bypass power supply connected to the input end of the compensation transformer, and a power unit cabinet connected to the input end of the bypass power supply, and the input end of the compensation transformer is connected with a current transformer; the energy supply unit comprises an energy supply transformer connected between the bus and the power unit cabinet and a circuit breaker connected to the output end of the energy supply transformer; and the connecting unit comprises a first wire harness assembly and a second wire harness assembly, the first wire harness assembly is connected to the bus, and the second wire harness assembly is connected to the input end of the energy supply transformer.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the protection unit comprises a high-voltage bypass switch connected in parallel with the input side and the output side of the bus, a high-voltage input switch connected in series with the input side of the bus, and a high-voltage output switch connected in series with the output side of the bus; the adjusting unit and the energy supply unit are connected in parallel to a region between the input side and the output side of the bus; the input side of the bus is also connected with a voltage transformer.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the protection unit also comprises a grounding protection piece, wherein the grounding protection piece is respectively connected to the input side and the output side of the bus; the ground protection member includes a ground switch and an over-current protector connected in parallel to the ground switch line.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the connecting unit further comprises a connecting pipe assembly, wherein the connecting pipe assembly comprises a mounting pipe, a first conductor, a second conductor and a limiting piece, the first conductor and the second conductor are arranged in the mounting pipe, and the limiting piece is sleeved on the mounting pipe in a matching way; the limiting piece is matched and connected with the second conductor.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the two ends of the installation tube are communicated, an external thread groove is formed in the outer side wall of the tube body, strip-shaped sliding grooves are symmetrically formed in the side wall of the tube body, and the strip-shaped sliding grooves are parallel to the axis of the installation tube.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: one end of the first conductor is provided with a wiring slot, and the other end of the first conductor is provided with a conductive protrusion; one end of the second conductor is provided with a conductive slot, and the other end of the second conductor is provided with an arc-shaped conductive block; the conductive protrusions can be inserted into the conductive slots in a matched mode, and the radial length of the conductive protrusions is larger than the radial depth of the conductive slots.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the limiting piece comprises a limiting pipe which is sleeved on the outer side wall of the mounting pipe in a sliding manner, an insulating pipe which is coated on the outer side wall of the second conductor, and connecting columns which are symmetrically arranged between the limiting pipe and the side wall of the insulating pipe; a deflection rod is hinged on the side wall of one end of the limiting pipe far away from the connecting column; an elastic piece is arranged between the insulating tube and the inner cavity tube orifice of the mounting tube, and the elastic piece is sleeved on the outer side wall of the second conductor; the connecting column is limited in the strip-shaped sliding groove in a sliding way.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the limiting piece also comprises a limiting ring, the limiting ring is connected to the external thread groove in a matched mode, and the end portion of the limiting ring can be contacted with one end, far away from the deflection rod, of the limiting pipe.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the first wire harness assembly comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate which are symmetrically arranged, and one ends of the first arc-shaped clamping plate and the second arc-shaped clamping plate are arranged on the side wall of the end part of the installation pipe through a hinge seat; and arc grooves are formed in the arc cavities of the two; the arc-shaped conductive blocks can be accommodated in the arc-shaped grooves in a matched mode.
As a preferable scheme of the rapid pressure regulating system for the overhead line of the coal mine mining field, the application comprises the following steps: the second wire harness assembly comprises a plurality of groups of clamping blocks, one end of each clamping block is hinged to the side wall of the end portion, far away from the first wire harness assembly, of the mounting pipe, and one end, far away from the limiting pipe, of the deflection rod is hinged to the side wall of the middle portion of each clamping block.
The application has the beneficial effects that:
the voltage regulating system can stabilize load voltage and eliminate three-phase unbalance of system voltage; the system stability and the power transmission capability can be improved; the electric energy quality problems such as power grid voltage fluctuation, voltage harmonic waves and the like can be eliminated; the response speed is high, the operation range is wide, and the voltage stability can be ensured at any time; the power unit faults can automatically switch the bypass operation state, so that the continuity of the power supply of the later stage is ensured; the power unit adopts a modularized parallel connection mode, so that the volume of the equipment is greatly reduced under the condition of the same capacity, the structure is simple, and the maintenance is convenient; in addition, the novel circuit connection unit has the characteristics of convenience in connection, safety and stability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is an overall electrical schematic diagram of the rapid overhead line voltage regulating system of the coal mine extraction site of the present application.
Fig. 2 is a schematic diagram of a specific connection of the fast overhead line voltage regulating system for the coal mine extraction field.
Fig. 3 is a schematic diagram of a connection scenario of a connection unit of the fast overhead line voltage regulating system of the coal mine mining field of the present application.
Fig. 4 is a schematic diagram of a three-dimensional structure of a connection unit of the rapid pressure regulating system of the overhead line in the coal mine mining field.
Fig. 5 is a schematic diagram showing the sectional structure of the initial state of the connection unit of the rapid pressure regulating system of the overhead line in the coal mine extraction field.
Fig. 6 is a schematic diagram of the connection state structure of the connection unit of the rapid pressure regulating system of the overhead line in the coal mine mining field.
Fig. 7 is a schematic diagram of a connection unit wiring state scene section of the rapid overhead line voltage regulating system of the coal mine mining field.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present application in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1 and 2, for a first embodiment of the present application, there is provided a fast voltage regulating system for an overhead line of a coal mine mining field, the voltage regulating system including a regulating unit 100, an energy supply unit 200, a connection unit 300 and a protection unit 400, wherein the mining field of an opencast coal mine uses a 35kV overhead annular pit line as a main, a 35/6.3kV mobile substation annular pit is arranged, a 35kV distribution line supplies power to a load, when voltage fluctuation occurs in the distribution line system, the regulating unit 100 is used for dynamic regulation of the line system voltage, the energy supply unit 200 is used for compensating electric energy to the regulating unit 100, and the protection unit 400 is used for protecting the circuit of the voltage regulating system; the connection unit 300 is a novel line connector for line connection of a bus and a branch line, so as to improve convenience, safety and stability of connection between lines.
The regulating unit 100 comprises a compensation transformer 101 connected to the bus L, a bypass power supply 102 connected to the input end of the compensation transformer 101, and a power unit cabinet 103 connected to the input end of the bypass power supply 102, wherein the input end of the compensation transformer 101 is connected with a current transformer 101a; the power unit cabinet 103, the bypass power supply 102 and the compensation transformer 101 are output in one direction and are connected to the bus L for adjusting the abnormal voltage appearing on the bus L, the power unit cabinet 103 provides the bypass power supply 102 with the required electric energy, the bypass power supply 102 compensates the reserved electric energy into the bus L through the compensation transformer 101, and the current transformer 101a is used for collecting the current of the secondary side of the transformer so as to monitor the compensation condition of the adjusting unit 100.
An energy supply unit 200 including an energy supply transformer 201 connected between the bus L and the power unit cabinet 103 and a circuit breaker 202 connected to an output terminal of the energy supply transformer 201; . The power supply unit 200 serves to compensate the functional unit cabinet 103 for electrical energy, while the circuit breaker 202 serves for the circuit-breaking protection of the power supply transformer 201.
A connection unit 300 including a first harness assembly 301 and a second harness assembly 302, the first harness assembly 301 being connected to the busbar L, the second harness assembly 302 being connected to the input of the power supply transformer 201; the first wire harness assembly 301 is connected to the busbar L, the second wire harness assembly 302 is connected to the input end of the power supply transformer 201 and other lines, and the two wire harness assemblies are connected in a matched manner, so that the busbar L is communicated with other branch lines.
Also included is a protection unit 400 comprising a high voltage bypass switch 401 connected in parallel to the input side and the output side of bus L, a high voltage input switch 402 connected in series to the input side of bus L, and a high voltage output switch 403 connected in series to the output side of bus L; the regulating unit 100 and the energizing unit 200 are connected in parallel to the region between the input side and the output side of the busbar L; the input side of the busbar L is also connected with a voltage transformer D.
The protection unit 400 further includes a ground protector 404, where the ground protector 404 is connected to the input side and the output side of the bus L, respectively; the ground protector 404 includes a ground switch 404a and an over-current protector 404b connected in parallel to the line of the ground switch 404 a.
The high-voltage input switch 302 and the high-voltage output switch 303 are connected in series on two sides of a line of the adjusting unit 100 and the energy supply unit 200 connected to the bus L to form a compensation area, and the high-voltage bypass switch 301 is also connected to the outer side of the compensation area for circuit protection. And the connected voltage transformer D is used for monitoring the voltage of the bus L in real time so as to realize the accuracy of compensation.
The input terminals of the compensation transformer 101, the power supply transformer 201 and the ground switch 404a are connected to the bus bar L through the connection unit 300. Since each branch is connected with the bus bar L trunk by a wire in a T-shaped structure, the connecting unit 300 adapting to the modeling is adopted for quick connection.
The voltage regulating system can realize rapid compensation of fluctuation of system voltage and stabilize load voltage by combining with the drawings shown in figures 1-2. The control process is that the line voltage of the 35kV bus is monitored in real time through the current transformer 101a and the voltage transformer D, when the system voltage does not meet the requirement, the power unit cabinet 103 outputs the voltage with the same phase as the system phase through the bypass power supply 102 and is coupled with the 35kV system voltage through the compensation transformer 101, so that the purpose of stabilizing the load end voltage is achieved. Similarly, when the actual output voltage is higher, the voltage with a certain phase difference with 35kV is output by the regulating unit 100 and coupled through the transformer, so that the output voltage reaches the standard, and when certain harmonic exists in the system voltage, the harmonic voltage with the same output size and opposite direction is counteracted by the regulating unit 100. The voltage regulating system is used for unidirectional lines and can also be used for dynamic compensation of three-phase voltage unbalance.
Example 2
Referring to fig. 3 to 7, a second embodiment of the present application is different from the first embodiment in that: the connection unit 300 further includes a connection pipe assembly 303, and the connection pipe assembly 303 includes a mounting pipe 303a, a first conductor 303b and a second conductor 303c disposed in the mounting pipe 303a, and a limiting member 303d cooperatively sleeved on the mounting pipe 303 a; the limiting member 303d is cooperatively connected with the second conductor 303 c.
The two ends of the installation tube 303a are communicated, the outer side wall of the tube body is provided with an external thread groove 303a-1, the side wall of the tube body is symmetrically provided with a strip-shaped chute 303a-2, and the strip-shaped chute 303a-2 is distributed parallel to the axis of the installation tube 303 a.
One end of the first conductor 303b is provided with a wiring slot 303b-1, and the other end thereof is provided with a conductive bump 303b-2; the connection slot 303b-1 is used for connecting the end of the branch cable, inserting the cable core end of the cable, and then matching with the second wire harness assembly 302 to clamp the insulating layer of the cable to realize stable connection. One end of the second conductor 303c is provided with a conductive slot 303c-1, and the other end of the second conductor 303c is provided with an arc-shaped conductive block 303c-2, wherein the arc-shaped conductive block 303c-2 is used for being attached to the side wall of the exposed bus L and is stably coated on the outer side wall of the bus L in cooperation with the first wire harness assembly 301 to realize connection; the conductive bump 303b-2 can be fittingly inserted into the conductive socket 303c-1 and has a radial length greater than the radial depth of the conductive socket 303 c-1. The purpose is that the first conductor 303b must be able to maintain electrical communication with the second conductor 303c when connected in a plug-in connection.
The limiting piece 303d comprises a limiting tube 303d-1 sleeved on the outer side wall of the mounting tube 303a in a sliding manner, an insulating tube 303d-2 coated on the outer side wall of the second conductor 303c, and a connecting column 303d-3 symmetrically arranged between the limiting tube 303d-1 and the side wall of the insulating tube 303 d-2; a deflection rod 303d-4 is hinged on the side wall of one end of the limiting tube 303d-1 far away from the connecting column 303d-3; an elastic piece 303d-5 is arranged between the insulating tube 303d-2 and the inner cavity tube orifice of the mounting tube 303a, and the elastic piece 303d-5 is sleeved on the outer side wall of the second conductor 303 c; the connecting post 303d-3 is slidably retained within the bar chute 303 a-2.
The limiting member 303d further comprises a limiting ring 303d-6, the limiting ring 303d-6 is connected to the external thread groove 303a-1 in a matching manner, and the end of the limiting ring 303d-6 can be contacted with one end of the limiting tube 303d-1 away from the deflection rod 303 d-4.
The first wire harness assembly 301 includes a first arc clamping plate 301a and a second arc clamping plate 301b which are symmetrically arranged, and one ends of the first arc clamping plate 301a and the second arc clamping plate 301b are arranged on the side wall of the end portion of the mounting pipe 303a through a hinge seat 301 c; and arc grooves H are formed in the arc cavities of the two; the arc-shaped conductive block 303c-2 can be cooperatively received in the arc-shaped groove H. The movements of the first arc clamping plate 301a and the second arc clamping plate 301b are controlled by the telescopic positions of the arc conductive blocks 303c-2, and the first arc clamping plate 301a and the second arc clamping plate are deflected around respective hinge points, and can be finally clasped on the outer side wall of the bus bar L or separated from each other, so that an opening shape in an initial state is formed.
The second harness assembly 302 includes a plurality of sets of clamping blocks 302a, one end of each clamping block 302a is hinged to an end side wall of the mounting tube 303a away from the first harness assembly 301, and one end of the deflection rod 303d-4 away from the limiting tube 303d-1 is hinged to a middle side wall of the clamping block 302 a. The shape of each group of clamping blocks 302a may be the same or different, and the same configuration is illustrated in this embodiment. Specifically, each of the clamping blocks 302a has one end hinged and the other end free to rotate about the hinge point, and one end of the deflection lever 303d-4 is hinged to the middle side wall of the clamping block 302a, so that the deflectable range of the deflection lever 303d-4 is limited. It should be noted that, in order to facilitate the stable clamping of each set of clamping blocks 302a on the outer side wall of one branch cable, the side wall of each set of clamping blocks 302a in contact with the cable may be adaptively processed.
Further, as compared with embodiment 1, the connection pipe assembly 303 is a main body assembly of the connection unit 300, and the first harness assembly 301 and the second harness assembly 302 are distributed at both ends thereof; specifically, the installation tube 303a is a main housing part of the connection tube assembly 303, is a tubular structure with hollow inside and through two ends, and the first conductor 303b and the second conductor 303c are matched and slide in the inner cavity of the installation tube 303a, so that the first conductor 303b and the second conductor 303c can be connected into a whole in a plugging manner; the limiting member 303d is a limiting structure of the connecting tube assembly 303, and is used for realizing clamping and binding of the first wire harness assembly 301 and the second wire harness assembly 302 to the wires.
Further, the external thread groove 303a-1 is formed at one end of the mounting tube 303a where the first conductor 303b is mounted, and is an invaginated groove, and the invagination is aimed at not affecting the sliding of the limiting tube 303d-1 outside the tube body of the mounting tube 303a, but is used for limiting the position of the limiting ring 303 d-6; and further to limit the position of the stopper tube 303 d-1. The strip-shaped sliding grooves 303a-2 are distributed in a strip shape along the axial side wall of the mounting tube 303a, at least two strips are symmetrically penetrated through the inner cavity and the outer side wall of the mounting tube 303a and used for mounting and limiting the connecting column 303 d-3.
Further, the limiting tube 303d-1 and the insulating tube 303d-2 are two independent annular tubes, wherein the insulating tube 303d-2 is located in the inner cavity of the mounting tube 303a and is coated on the outer side wall of the second conductor 303c, and the limiting tube 303d-1 is located in the outer cavity of the mounting tube 303a and is sleeved on the outer side wall of the mounting tube 303 a; one end of the connecting column 303d-3 is connected to the inner side wall of the limiting tube 303d-1, and the other end is connected to the outer side wall of the insulating tube 303d-2, and due to the existence of the strip-shaped sliding groove 303a-2, that is, the sliding range of the limiting tube 303d-1 and the insulating tube 303d-2 is the length of the groove body of the strip-shaped sliding groove 303 a-2.
Further, the other end of the limiting tube 303d-1 has a deflection lever 303d-4, by which the state of the second beamline assembly 302 is changed. The elastic member 303d-5 is used to keep the connection unit 300 returning to the original state after use, and a spring is typically used; the movable range of the limiting ring 303d-6 is the axial distribution range of the external thread groove 303a-1, and is used for limiting or releasing the clamping or releasing state of the connection unit 300.
The rest of the structure is the same as that of embodiment 1.
Referring to fig. 3 to 7, in the initial state of the connection unit 300, due to the elastic member 303d-5, the second conductor 303c is pulled to one side of the first harness assembly 301, and at this time, the first conductor 303b and the second conductor 303c are separated from each other, and the first arc clamping plate 301a and the second arc clamping plate 301b of the first harness assembly 301 are in a stretched state, so as to facilitate the insertion of the bus bar L; and simultaneously, under the synchronous action of the connecting columns 303d-3, the limiting tube 303d-1 is at the uppermost part (one side close to the first wire harness assembly 301 in the plane of the drawing) so that the deflection rod 303d-4 deflects, and pulls each clamping block 302a to deflect, so that the whole second wire harness assembly 302 is in a stretched state, and the branch wire cables are conveniently put in. The stop collar 303d-6 is now in no contact with or above the end of the stop tube 303 d-1.
After the busbar L and the branch cable are placed, the rotation limiting ring 303d-6 approaches or presses the side wall of the limiting tube 303d-1, so that the limiting tube slides down along the tube wall of the mounting tube 303a, and the second harness assembly 302 is in a closed state as a whole by pushing the deflection rod 303d-4 to deflect; the limiting tube 303d-1 drives the insulating tube 303d-2 to slide towards the inner cavity of the mounting tube 303a through the connecting column 303d-3, namely the second conductor 303c slides towards the inner cavity of the mounting tube 303a, and finally the limiting tube and the end part of the first conductor 303b are spliced and matched into a whole; in the sliding process of the second conductor 303c, the elastic member 303d-5 is stretched, the arc-shaped conductive block 303c-2 at the end of the elastic member is gradually accommodated in the arc-shaped groove H in a matched manner, and the first arc-shaped clamping plate 301a and the second arc-shaped clamping plate 301b are shifted to deflect, and finally the elastic member is coated on the outer side wall of the busbar L. Finally, the stable connection state is maintained under the action of the limiting ring 303 d-6.
When the connection unit 300 needs to be removed, only the limiting ring 303d-6 is required to be reversely rotated to release the limitation of the limiting tube 303d-1, and the first wire harness assembly 301 and the second wire harness assembly 302 can be restored to the original open state under the action of the elastic member 303d-5 for reuse.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (2)
1. A quick pressure regulating system of coal mine excavation site overhead line, its characterized in that: comprising the steps of (a) a step of,
the regulating unit (100) comprises a compensation transformer (101) connected to the bus (L), a bypass power supply (102) connected to the input end of the compensation transformer (101), and a power unit cabinet (103) connected to the input end of the bypass power supply (102), wherein the input end of the compensation transformer (101) is connected with a current transformer (101 a);
an energy supply unit (200) comprising an energy supply transformer (201) connected between the busbar (L) and the power unit cabinet (103) and a circuit breaker (202) connected to the output of the energy supply transformer (201);
a connection unit (300) comprising a first harness assembly (301) and a second harness assembly (302), the first harness assembly (301) being connected to the busbar (L), the second harness assembly (302) being connected to the input of the power supply transformer (201); the method comprises the steps of,
a protection unit (400) including a high-voltage bypass switch (401) connected in parallel to the input side and the output side of the bus bar (L), a high-voltage input switch (402) connected in series to the input side of the bus bar (L), and a high-voltage output switch (403) connected in series to the output side of the bus bar (L);
the protection unit (400) further comprises a grounding protection piece (404), and the grounding protection piece (404) is respectively connected to the input side and the output side of the bus (L); the ground protector (404) comprises a ground switch (404 a) and an over-current protector (404 b) connected in parallel to the ground switch (404 a) line;
the connecting unit (300) further comprises a connecting pipe assembly (303), wherein the connecting pipe assembly (303) comprises a mounting pipe (303 a), a first conductor (303 b) and a second conductor (303 c) which are arranged in the mounting pipe (303 a), and a limiting piece (303 d) which is sleeved on the mounting pipe (303 a) in a matching way; the limiting piece (303 d) is matched and connected with the second conductor (303 c);
the two ends of the mounting pipe (303 a) are communicated, an external thread groove (303 a-1) is formed in the outer side wall of the pipe body, strip-shaped sliding grooves (303 a-2) are symmetrically formed in the side wall of the pipe body, and the strip-shaped sliding grooves (303 a-2) are distributed parallel to the axis of the mounting pipe (303 a);
one end of the first conductor (303 b) is provided with a wiring slot (303 b-1), and the other end of the first conductor is provided with a conductive protrusion (303 b-2);
one end of the second conductor (303 c) is provided with a conductive slot (303 c-1), and the other end of the second conductor is provided with an arc-shaped conductive block (303 c-2); the conductive protrusion (303 b-2) can be inserted into the conductive slot (303 c-1) in a matching way, and the radial length of the conductive protrusion is larger than the radial depth of the conductive slot (303 c-1)
The limiting piece (303 d) comprises a limiting tube (303 d-1) which is sleeved on the outer side wall of the mounting tube (303 a) in a sliding manner, an insulating tube (303 d-2) which is coated on the outer side wall of the second conductor (303 c), and connecting columns (303 d-3) which are symmetrically arranged between the limiting tube (303 d-1) and the side wall of the insulating tube (303 d-2); a deflection rod (303 d-4) is hinged on the side wall of one end, far away from the connecting column (303 d-3), of the limiting tube (303 d-1); an elastic piece (303 d-5) is arranged between the insulating tube (303 d-2) and the inner cavity tube orifice of the mounting tube (303 a), and the elastic piece (303 d-5) is sleeved on the outer side wall of the second conductor (303 c); the connecting column (303 d-3) is limited in the strip-shaped chute (303 a-2) in a sliding way;
the limiting piece (303 d) further comprises a limiting ring (303 d-6), the limiting ring (303 d-6) is connected to the external thread groove (303 a-1) in a matched mode, and the end portion of the limiting ring can be in contact with one end, far away from the deflection rod (303 d-4), of the limiting tube (303 d-1);
the first wire harness assembly (301) comprises a first arc clamping plate (301 a) and a second arc clamping plate (301 b) which are symmetrically arranged, and one ends of the first arc clamping plate (301 a) and the second arc clamping plate (301 b) are arranged on the side wall of the end part of the mounting pipe (303 a) through a hinging seat (301 c); and arc grooves (H) are formed in the arc cavities of the two;
the arc-shaped conductive block (303 c-2) can be accommodated in the arc-shaped groove (H) in a matching way;
the second wire harness assembly (302) comprises a plurality of groups of clamping blocks (302 a), one end of each clamping block (302 a) is hinged to the side wall of the end portion, away from the first wire harness assembly (301), of the mounting tube (303 a), and one end, away from the limiting tube (303 d-1), of the deflection rod (303 d-4) is hinged to the side wall of the middle portion of the clamping block (302 a).
2. The coal mine excavation site overhead line rapid pressure regulating system of claim 1, wherein: the regulating unit (100) and the energy supply unit (200) are connected in parallel to the region between the input side and the output side of the busbar (L);
the input side of the bus (L) is also connected with a voltage transformer (D).
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| CN202210187758.5A CN114530858B (en) | 2022-02-28 | 2022-02-28 | Quick pressure regulating system of coal mine excavation site overhead line |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332657A (en) * | 2010-06-01 | 2012-01-25 | 富士康(昆山)电脑接插件有限公司 | Hybrid modular jack |
| CN107910868A (en) * | 2017-12-10 | 2018-04-13 | 国网福建华安县供电有限公司 | Outdoor series voltage quality regulating device |
| CN113890046A (en) * | 2021-09-30 | 2022-01-04 | 华能伊敏煤电有限责任公司 | Open coal mine 35kV distribution lines quick voltage regulation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7129599B2 (en) * | 2002-10-15 | 2006-10-31 | Soft Switching Technologies Corporation | Dual feed power supply systems with enhanced power quality |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332657A (en) * | 2010-06-01 | 2012-01-25 | 富士康(昆山)电脑接插件有限公司 | Hybrid modular jack |
| CN107910868A (en) * | 2017-12-10 | 2018-04-13 | 国网福建华安县供电有限公司 | Outdoor series voltage quality regulating device |
| CN113890046A (en) * | 2021-09-30 | 2022-01-04 | 华能伊敏煤电有限责任公司 | Open coal mine 35kV distribution lines quick voltage regulation system |
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