High-voltage cable outlet hole arrangement structure without short inclined shaft

Abstract

The utility model discloses a high-voltage cable outlet hole arrangement structure without a short inclined shaft. The high-voltage cable outlet hole arrangement structure comprises a main transformer hole, a tail water emergency gate hole, a high-voltage cable outlet hole, a middle and low voltage cable hole and a switching station, the main transformer hole and the tail gate hole are arranged in parallel; the wire outlet hole is used for communicating the main transformer hole and the switching station; the cable hole is arranged between the main transformer hole and the tail gate hole, and the cable hole, the main transformer hole and the tail gate hole are arranged in parallel. Cables are arranged in the main transformer hole, the wire outlet hole and the cable hole; one end of the cable is connected to the switching station, and the other end is connected with equipment in the main transformer hole. The high-voltage cable outlet hole has the advantages that the gradient of the high-voltage cable outlet hole without the short inclined shaft is slow, the construction of the hole is convenient, the safety is high, and the construction period is shortened. The high-voltage cable outlet hole without the short inclined shaft does not need to be provided with steps and handrails due to steep gradient of the cavity, the internal structure of the cavity is simple, and engineering investment is saved. The high-voltage cable outlet hole without the short inclined shaft does not need to walk up and down along the inclined shaft when the high-voltage cable is patrolled and maintained, so that the operation management is convenient, and the ventilation of the hole is facilitated.

Description

Technical Field

[0001] The utility model relates to a high-voltage cable outlet hole arrangement structure, in particular to a high-voltage cable outlet hole arrangement structure without a short inclined shaft. Background Art

[0002] With the continuous advancement of the construction of a new power system with new energy as the main body, the large-scale development of pumped storage power stations, as the most mature, economically optimal, and most suitable low-carbon, clean, and flexible power source, is of great significance. The layout of pumped storage power stations often involves the layout of high-voltage cable outlets. Generally speaking, high-voltage cables need to be led from the main transformer tunnel of the pumped storage power station to the switch station site for further access to the power grid system. The switch station site is usually located somewhere on the surface downstream of the underground plant. The high-voltage cable needs to cross the tailwater accident gate tunnel (referred to as the tail gate tunnel) to the switch station. Therefore, the outlet tunnel usually adopts a short inclined shaft + flat tunnel layout. Considering that the short inclined shaft is complex to construct, the cost is high and affects safety, it is very important to choose a high-voltage cable outlet tunnel layout without a short inclined shaft for the project itself. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a high-voltage cable outlet hole arrangement structure without a short inclined shaft.

[0004] The utility model adopts the following technical solutions:

[0005] A high-voltage cable outlet hole arrangement structure without a short inclined shaft includes a main transformer hole, a tail gate hole, an outlet hole, a cable hole and a switch station; the main transformer hole is arranged in parallel with the tail gate hole; the outlet hole is used to connect the main transformer hole and the switch station; the cable hole is between the main transformer hole and the tail gate hole, and the three are arranged in parallel; cables are arranged in the main transformer hole, the outlet hole and the cable hole; one end of the cable is connected to the switch station, and the other end is connected to the equipment in the main transformer hole. The main transformer hole is a cavern where the main transformer equipment is installed, and the tail gate hole is a tailwater accident gate hole. The high-voltage cable is led out from the side wall of the main transformer hole and then turns at a right angle to the outlet hole, so as to be led out from the side, avoiding the use of a short inclined shaft for the high-voltage cable outlet hole due to crossing the cavern. In general pumped storage power station projects, the tailgate is arranged in parallel with the main transformer tunnel and is located downstream of the main transformer tunnel. The high-voltage cable is led out from the downstream side wall of the main transformer tunnel and further connected to the switch station site somewhere on the surface downstream of the tailgate. Therefore, it is necessary to cross the downstream tailgate. Therefore, the high-voltage cable outlet hole usually adopts a short inclined shaft + flat tunnel outlet method, but the inclined shaft construction is difficult, unsafe, and expensive. The outlet hole arrangement method without a short inclined shaft is to turn the high-voltage cable from the side wall of the main transformer tunnel at a right angle at the starting section of the outlet hole to the outlet hole arranged in parallel with the main transformer tunnel and the tailgate. Since the outlet hole is located between the main transformer tunnel and the tailgate, and the three are arranged in parallel, there is no need to set a short inclined shaft to cross the relevant caverns, and it can be directly connected to the switch station site through the outlet hole, which is convenient for passage, construction, low cost and high safety.

[0006] Furthermore, the outlet hole is arranged perpendicularly to the cable hole. The cable hole is connected to the outlet hole at a right angle, which is conducive to the straight-line laying of the internal medium and low voltage cables. The cable hole is a medium and low voltage cable hole for arranging medium and low voltage cables.

[0007] Furthermore, the outlet hole is provided with high-voltage cables and medium- and low-voltage cables, and the outlet hole is a high-voltage cable outlet hole.

[0008] Furthermore, the outlet hole is divided into two layers. The high-voltage cable is vertically led out from the downstream side wall of the main transformer hole to the starting section of the high-voltage cable outlet hole. The starting section has only one layer, with a length of about 14.9m, in the shape of a city gate, and the net size of the cave is about 10.3m×7.4m. The end of the starting section of the outlet hole is divided into two layers after a right-angle turn, the upper layer is the traffic road, and the lower layer is the outlet road.

[0009] Furthermore, the cables in the cable hole are connected to the upper layer of the outlet hole, and the cables in the starting section of the outlet hole are arranged in the lower layer of the outlet hole after a right-angle turn. The outlet hole is in the shape of a city gate hole, with a net size of approximately 4.2m×6.9m, divided into two layers, the upper brick wall separates the transaction channel and the smoke exhaust duct, and the lower layer is the outlet channel, which is connected to the ground switch station at a certain slope.

[0010] Beneficial effects of the utility model:

[0011] 1. The slope of the high-voltage cable outlet tunnel without a short inclined shaft is gentle, the cavern construction is convenient, the safety is high, and the construction period is saved.

[0012] 2. The high-voltage cable outlet tunnel without a short inclined shaft does not need steps or railings due to the steep slope of the cavern. The internal structure of the cavern is simple, saving engineering investment.

[0013] 3. When inspecting and maintaining the high-voltage cables in the high-voltage cable outlet hole without a short inclined shaft, there is no need to walk up or down the inclined shaft, which is convenient for operation and management and more conducive to cave ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Attached Figure 1 This is a layout diagram of the utility model.

[0016] The names of the components in the figure are: 1- medium and low voltage cable holes; 2- high voltage cable outlet holes; 3- tailwater accident gate holes; 4- main transformer holes; 5- cables; 6- switch station. DETAILED DESCRIPTION

[0017] In conjunction with the instruction manual Figure 1 The specific implementation is as follows:

[0018] The high-voltage cable is led out from the side wall of the main transformer tunnel 4 and then turns at a right angle to the outlet tunnel 2, so as to be led out from the side, avoiding the use of a short inclined shaft for the outlet tunnel 2 due to the cross-tunnel. In the pumped storage power station project, the tailgate tunnel 3 is arranged in parallel with the main transformer tunnel 4 and is located downstream of the main transformer tunnel 4. The high-voltage cable is led out from the downstream side wall of the main transformer tunnel 4 to the starting section of the outlet tunnel 2, and further connected to the switch station 6 site somewhere on the surface downstream of the tailgate tunnel 3. Therefore, it is necessary to cross the downstream tailgate tunnel 3. Therefore, the high-voltage cable outlet tunnel usually adopts the outlet method of short inclined shaft + flat tunnel, but the inclined shaft construction is difficult, unsafe and costly. The arrangement of the outgoing cable tunnel without a short inclined shaft is to make a right-angle turn of the high-voltage cable 5 led out from the side wall of the main transformer tunnel through the starting section of the outgoing cable tunnel to the outgoing cable tunnel 2 arranged in parallel with the main transformer tunnel 4 and the tail gate tunnel 3. Since the outgoing cable tunnel 2 is located between the main transformer tunnel 4 and the tail gate tunnel 3, and the three are arranged in parallel, there is no need to set up a short inclined shaft to cross the relevant caverns, and it can be directly connected to the switch station 6 site, which is convenient for passage, construction, low cost and high safety.

[0019] The outlet hole 2 is arranged vertically with the cable hole 1. The cable hole 1 is connected to the outlet hole 2 at the right angle turn of the outlet hole 2, which is conducive to the straight laying of the internal cable lines when the medium and low voltage cables are connected from the cable hole 1 to the outlet hole 2.

[0020] The outlet hole 2 is equipped with high-voltage cables and medium- and low-voltage cables.

[0021] The starting section of the outlet hole 2 is arranged in one layer. After the cables are connected to the outlet hole 2 in the cable hole, they are arranged in upper and lower separations. The high-voltage cable is vertically led out from the downstream side wall of the main transformer hole 4 to the starting section of the high-voltage cable outlet hole. The length of the starting section of the outlet hole is about 14.9m, in the shape of a city gate hole, and the net size of the cave is about 10.3m×7.4m. The end of the starting section of the outlet hole is divided into upper and lower layers after a right-angle turn. The upper layer is the traffic road and the lower layer is the outlet road.

[0022] The cables in the medium and low voltage outlet holes are arranged in the upper layer of outlet hole 2, and the cables in the high voltage outlet hole are arranged in the lower layer of outlet hole 2. Outlet hole 2 is in the shape of a city gate hole, with a net size of about 4.2m×6.9m, divided into two layers, the upper brick wall separates the transaction passage and the smoke exhaust duct, and the lower layer is the outlet channel, which is connected to the ground switch station at a certain slope.

[0023] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A high-voltage cable outlet hole arrangement structure without a short inclined shaft, characterized in that: It includes a main transformer tunnel, a tail gate tunnel, an outgoing wire tunnel, a cable tunnel and a switch station; the main transformer tunnel and the tail gate tunnel are arranged in parallel; the outgoing wire tunnel is used to connect the main transformer tunnel and the switch station; the cable tunnel is between the main transformer tunnel and the tail gate tunnel, and the three are arranged in parallel; cables are arranged in the main transformer tunnel, the outgoing wire tunnel and the cable tunnel; one end of the cable is connected to the switch station, and the other end is connected to the equipment in the main transformer tunnel.

2. A high-voltage cable outlet hole arrangement structure without a short inclined shaft according to claim 1, characterized in that: The wire outlet hole is arranged vertically to the cable hole.

3. The high-voltage cable outlet hole arrangement structure without a short inclined shaft according to claim 1 is characterized in that: The outlet hole is provided with high-voltage cables and medium- and low-voltage cables.

4. The high-voltage cable outlet hole arrangement structure without a short inclined shaft according to claim 1 is characterized in that: The cable outlet hole is divided into two layers, upper and lower layers.

5. The high-voltage cable outlet hole arrangement structure without a short inclined shaft according to claim 3 is characterized in that: The medium and low voltage cables are arranged in the upper layer of the outlet hole, and the high voltage cables are arranged in the lower layer of the outlet hole.

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