A cable bridge mounting structure for a pumped storage power station water replenishment pump house
Patent Information
- Application Number
- CN202522363979.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-11-07
AI Technical Summary
该传统安装方式在潜水泵检修时存在显著弊端：其一，检修需拆除全路径电缆，由于电缆需从供电电源端（通常距离泵房数十米至数百米）断开，且泵房内电缆桥架上的电缆长度需覆盖从电缆沟入口到潜水泵的全部距离，导致需吊出的电缆总长度可达数十米至数百米，操作时需多人协同拖拽，劳动强度大；其二，长距离电缆吊出过程中，易与泵房内的管道、设备发生摩擦，造成电缆绝缘层破损，增加漏电风险，同时也可能对其他设备造成碰撞损坏；其三，检修效率极低，单次潜水泵检修仅电缆拆除与复位环节就需2-4小时，严重影响补水泵房的应急补水能力，进而可能干扰抽水蓄能电站的整体调度运行
1.大幅缩短检修电缆操作长度，降低劳动强度：通过转接箱组件实现电缆分段连接，潜水泵检修时仅需断开转接箱内的潜水泵连接电缆（长度2-3m），无需拆除全路径长电缆（原长度数十米），操作人数从原4-6人减少至2人，单次电缆操作时间从2-4小时缩短至15-30分钟，显著降低劳动强度与时间成本；
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Figure CN224862740U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable tray installation, specifically a cable tray installation structure for a pumping station's makeup water pump room. Background Technology
[0002] Currently, in the power supply system of submersible pumps in the water replenishment pumping station of pumped storage power stations, the cable laying generally adopts a single series path of "power supply - cable trench outside the pumping station - cable tray inside the pumping station - submersible pump". Specifically, after the power supply cable is led out from the power distribution room of the water replenishment pumping station, it is first laid through a pre-designated underground cable trench outside the pumping station to the outside of the water replenishment pumping station, then enters the pumping station, extends along the cable tray fixed on the inner wall or ground of the pumping station, enters the submersible well, and finally connects directly to the terminal of the submersible pump to realize power transmission. This traditional installation method has significant drawbacks during submersible pump maintenance: First, maintenance requires the removal of the entire cable path. Since the cable needs to be disconnected from the power supply end (usually tens to hundreds of meters from the pump house), and the cable length on the cable tray in the pump house needs to cover the entire distance from the cable trench entrance to the submersible pump, the total length of cable to be hoisted out can reach tens to hundreds of meters. This requires multiple people to work together to drag the cable, resulting in high labor intensity. Second, during the hoisting of long-distance cables, friction with pipes and equipment in the pump house is likely to occur, causing damage to the cable insulation layer, increasing the risk of leakage, and may also cause collision damage to other equipment. Third, the maintenance efficiency is extremely low. A single submersible pump maintenance requires 2-4 hours just for the cable removal and repositioning process, which seriously affects the emergency water supply capacity of the water replenishment pump house and may interfere with the overall scheduling and operation of the pumped storage power station. Therefore, there is an urgent need for a cable tray installation structure for the water supply pump room of a pumped storage power station that can shorten the cable handling length during maintenance, reduce labor intensity, improve maintenance efficiency, and ensure the safety of equipment and cables. Utility Model Content
[0003] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a cable tray installation structure for a water replenishment pump room of a pumped storage power station.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a cable tray installation structure for a water replenishment pump room of a pumped storage power station, including an external cable trench section, a main cable tray inside the pump room, a transfer box assembly, branch cable trays, a submersible pump, and a power supply; the main cable tray, transfer box assembly, branch cable trays, and submersible pump inside the pump room are all installed inside the water replenishment pump room; One end of the external cable trench section is connected to the power supply, and the other end is connected to the input end of the main cable tray in the pump house; a branch cable tray is provided on the main cable tray in the pump house, and the input end of the branch cable tray is connected to the output end of the transfer box assembly; the submersible pump is connected to the transfer box assembly through the submersible pump connecting cable.
[0005] By using the junction box assembly to achieve segmented cable connection, when the submersible pump is under maintenance, only the submersible pump connection cable in the junction box needs to be disconnected, without having to remove the entire long cable. The number of operators has been reduced from 4-6 people to 2 people, and the time for a single cable operation has been shortened from 2-4 hours to 15-30 minutes, significantly reducing labor intensity and time costs.
[0006] The present invention is further configured such that: the main cable tray in the pump room is a hot-dip galvanized steel trough-type cable tray, which is fixed to the side wall or ground of the water supply pump room by I-beam columns, brackets and expansion bolts; The water supply pump room has a reserved hole in the wall. The main cable tray inside the pump room is laid from the reserved hole until it extends to the input end of the junction box assembly. The external cable trench section passes through the reserved hole and connects to the input end of the main cable tray inside the pump room.
[0007] The present invention is further configured such that: the inner wall of the main cable tray in the pump room is provided with an insulating rubber pad to prevent the cable from being damaged by friction with the metal tray.
[0008] The present invention is further configured such that: the adapter box assembly includes a box body, a terminal block, a dust cover, a grounding PE copper busbar, and a fixing bracket; The enclosure contains two sets of terminal blocks and a common grounding PE copper busbar. The side wall of the enclosure has heat dissipation holes. The dust cover is connected to the enclosure via a hinge. The fixing bracket is welded to the bottom of the enclosure and fixed to the ground or wall of the water supply pump room by expansion bolts.
[0009] This invention is further configured such that the installation height of the adapter box assembly is 1.2-1.5m above the ground, facilitating wiring and disconnection by operators.
[0010] The present invention is further configured such that the number of branch cable trays is consistent with the number of submersible pumps in the water supply pump room, and the laying path of each branch cable tray extends from the junction box assembly to above the corresponding submersible pump.
[0011] The present invention is further provided in that: insulating rubber pads are provided in the grooves of the branch cable trays. In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows: 1. Significantly reduces the length of cable maintenance operations and lowers labor intensity: By using the junction box assembly to achieve segmented cable connection, when maintaining the submersible pump, only the submersible pump connection cable (2-3m in length) needs to be disconnected in the junction box, without having to remove the entire long cable (originally tens of meters in length). The number of operators is reduced from 4-6 people to 2 people, and the time for a single cable operation is shortened from 2-4 hours to 15-30 minutes, significantly reducing labor intensity and time costs. 2. Ensure cable and equipment safety: Since only a short distance of the submersible pump connection cable is operated during maintenance, friction and collision with pipes and equipment in the pump room are avoided during the dragging of long cables. The cable insulation damage rate is reduced to 0, and the risk of collision damage to other equipment is also reduced. 3. Improve the reliability of the water supply pumping station: Improved maintenance efficiency has significantly reduced the downtime of submersible pumps and increased the emergency water supply response speed of the water supply pumping station by more than 80%, ensuring the overall scheduling and operation stability of the pumped storage power station. 4. Simple structure and strong versatility: This structure is improved by adding a junction box assembly and branch cable trays. There is no need to modify the existing pump house structure and power supply. It can be applied to the construction and renovation projects of water supply pump houses of pumped storage power stations of different scales. It has low manufacturing cost and is easy to promote in batches. Attached Figure Description To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the cable tray installation structure for the water supply pump room of a pumped storage power station as described in the embodiment. Figure 2 This is a structural schematic diagram of the adapter box assembly; Figure 3 Side view of the junction box assembly; Figure 4 This is a schematic diagram of the fixed bracket; Figure 5 This is a block diagram of the cable connection path.
[0013] The attached diagram lists the components represented by each number as follows: 1-External cable trench section cable, 2-Water replenishment pump room wall, 3-Main cable tray inside the pump room, 4-Transfer box assembly, 4.1-Box body, 4.2-Terminal block, 4.3-Grounding PE bar, 4.4-Dustproof cover, 4.5-Fixed bracket, 5-Branch cable tray, 6-Submersible pump connection cable, 7-Submersible pump, 8-Power supply. Detailed Implementation
[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.
[0015] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.
[0016] Example: like Figures 1-5 As shown, this is a preferred embodiment of the present invention, a cable tray installation structure for a pumping station makeup water room, which is applied to a pumping station makeup water room (equipped with 4 submersible pumps, 2 of which are model 350WQ / P13151 and 2 of which are model 300WQ / P1314A).
[0017] Includes external cable trench section cable 1, main cable tray 3 in pump room, junction box assembly 4, branch cable tray 5, and submersible pump connection cable 6; The external cable trench section cable 1 is a WDZA-YJY,-3x185+2x95 cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant Class A power cable. One end is electrically connected to the low-voltage side of the 10kV / 0.4kV transformer in the power distribution room of the water supply pump room, i.e., the power supply 8. The other end passes through the reserved hole in the wall 2 of the water supply pump room and extends into the pump room.
[0018] The main cable tray 3 in the pump room is made of hot-dip galvanized steel. The tray size is 600mm×100mm (width×height). It is fixed to the pump room floor with M12 expansion bolts. The laying path extends from the reserved hole on the wall 2 of the water supply pump room to the input end of the junction box assembly 4. The total length of the main cable tray 3 in the pump room is about 20m.
[0019] Combination Figures 2-4The junction box assembly 4 includes a box body 4.1, terminal blocks 4.2, a dust cover 4.4, a grounding PE copper busbar 4.3, and a fixing bracket 4.5. The box body 4.1 is made of 304 stainless steel and has dimensions of 800mm×300mm×600mm (length×width×height). Inside the box body 4.1, there are two sets of JXT1-10 / 8 copper terminal blocks 4.2 and one common grounding PE copper busbar 4.3 (each terminal block contains 3 copper busbars, and each terminal block contains 2 inlet holes and 2 outlet holes). There are 10 Φ10mm heat dissipation holes on each side of the box body 4.1. The dust cover 4.4 at the rear is connected to the top of the box body 4.1 by a hinge. The fixing bracket 4.5 is an L-shaped angle steel (specification 40×40×4mm) welded to the bottom of the box body. The fixing bracket 4.5 is fixed to the pump room floor by two M12 expansion bolts. The installation height of the junction box assembly 4 is 1.3m.
[0020] There are two sets of branch cable trays 5, each made of hot-dip galvanized steel. The tray dimensions are 300mm × 100mm (width × height). The input ends of both sets of branch cable trays 5 are connected to the output ends of the junction box assembly 4. The laying paths extend from the junction box assembly 4 to the top of the four submersible pumps 7. The length of each set of branch cable trays 5 is 1.5m. They are fixed to the pump room floor with M12 expansion bolts. The total length of the branch cable trays 5 is approximately 3.5m.
[0021] The 350WQ / P13151 submersible pump uses three sets of YCW3*70+1*25 heavy-duty rubber-sheathed flexible field cables as the submersible pump connection cable 6, with a length of 30m. The 300WQ / P1314A submersible pump uses two sets of YCW3*70+1*25 heavy-duty rubber-sheathed flexible field cables as the submersible pump connection cable 6, with a length of 30m. One end passes through the corresponding branch cable tray 5 and is electrically connected to the terminal block 4.2 in the adapter box assembly 4 via a copper lug (secured with M6 bolts). The other end is electrically connected to the terminal block of the submersible pump 7 via a waterproof connector.
[0022] The working process and maintenance procedure of this embodiment are as follows: During normal operation, the power supply enters the main cable tray in the pump room through the external cable trench, is transmitted to the transfer box assembly through the main cable tray, and is then distributed to the four submersible pump connection cables through the terminal block in the transfer box, ultimately supplying power to the four submersible pumps. When a submersible pump 7 needs maintenance, the operator only needs to open the dust cover 4.5 at the rear of the adapter box assembly 4, loosen the M6 bolt of the corresponding submersible pump connecting cable 6, disconnect the cable from the terminal block 4.2, and then the submersible pump 7 can be lifted out directly for maintenance. After maintenance, the submersible pump connecting cable only needs to be reconnected to the terminal block 4.2 of the adapter box assembly 4, the bolts tightened and the dust cover 4.4 closed to complete the reset. There is no need to operate the external cable trench section cable 1 and the long cable in the main cable tray 3 in the pump room. Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.
Claims
1. A cable tray installation structure for a water supply pump room of a pumped storage power station, characterized in that, It includes external cable trench sections, main cable trays, junction box assemblies, branch cable trays, submersible pumps, and power supply; the main cable trays, junction box assemblies, branch cable trays, and submersible pumps are all located in the water replenishment pump room; One end of the external cable trench section is connected to the power supply, and the other end is connected to the input end of the main cable tray in the pump room. A branch cable tray is installed on the main cable tray in the pump room. The input end of the branch cable tray is connected to the output end of the transfer box assembly. The submersible pump is connected to the transfer box assembly through a submersible pump connecting cable.
2. The cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 1, characterized in that, The main cable tray in the pump room is a hot-dip galvanized steel trough-type cable tray, which is fixed to the side wall or ground of the water supply pump room by I-beam columns, brackets and expansion bolts. The water supply pump room has a reserved hole in the wall. The main cable tray inside the pump room is laid from the reserved hole until it extends to the input end of the junction box assembly. The external cable trench section passes through the reserved hole and connects to the input end of the main cable tray inside the pump room.
3. The cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 2, characterized in that, The inner wall of the main cable tray in the pump room is equipped with an insulating rubber pad to prevent the cable from being damaged by friction with the metal tray.
4. The cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 2, characterized in that, The adapter box assembly includes a box body, terminal blocks, dust cover, grounding PE copper busbar, and fixing bracket; The enclosure contains two sets of terminal blocks and a common grounding PE copper busbar. The side wall of the enclosure has heat dissipation holes. The dust cover is connected to the enclosure via a hinge. The fixing bracket is welded to the bottom of the enclosure and fixed to the ground or wall of the water supply pump room with expansion bolts.
5. The cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 4, characterized in that, The installation height of the adapter box assembly from the ground ranges from 1.2 to 1.5 meters.
6. The cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 1, characterized in that, The number of branch cable trays is the same as the number of submersible pumps in the water supply pump room, and the laying path of each branch cable tray extends from the junction box assembly to above the corresponding submersible pump.
7. A cable tray installation structure for a pumping station makeup water room of a pumped storage power station according to claim 6, characterized in that, Each branch cable tray is equipped with an insulating rubber pad inside its groove.