Pressure tunnel access door dredging device

Abstract

The utility model discloses a pressure tunnel access door dredging device which comprises a pressure tunnel and a construction adit, an access door is arranged at an outlet of the construction adit, a water pump is fixedly arranged at the end, close to the construction adit, of the access door, and the output end of the water pump is connected with a water conveying channel connected with the interior of the access door. The end, away from the water pump, of the water conveying channel communicates with a water storage plate, a plurality of first water spraying pipes are evenly arranged at the bottom end of the water storage plate at intervals, a sand accumulation pool is arranged at the position, below the access door, in the pressure tunnel, a stainless steel frame is arranged at the upper end of the sand accumulation pool, and second water spraying pipes are fixedly arranged on the first water spraying pipes. Flushing water is pumped into the first water spraying pipe and the second water spraying pipe through the water pump, one end face of the sand accumulation pool is flushed through the first water spraying pipe, the other end face of the sand accumulation pool is flushed through the second water spraying pipe, and therefore silt in the sand accumulation pool can be cleaned conveniently.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower engineering technology, specifically to a dredging device for pressurized tunnel inspection doors. Background Technology

[0002] A pressurized tunnel is a hydraulic tunnel in which water flows under full pressure throughout its entire length. It generally has a circular cross-section, and the cross-sectional dimensions should be determined according to the head and maximum flow rate using pipe flow formulas. In pressurized spillway tunnels, the control section and operating gates are often located at the outlet. When the gates are closed, the tunnel is under the full head of the reservoir; when the gates are opened, water is discharged at a high velocity, causing a sharp drop in pressure, but the tunnel should still be pressurized throughout. The flow velocity inside a pressurized diversion tunnel used in a hydroelectric power station should be much lower than that in a spillway tunnel to minimize head loss.

[0003] In water conservancy and hydropower projects, a certain number of access gates are typically installed to facilitate the maintenance of pressurized water diversion tunnels during power station operation. However, because the water flow behind these access gates is in a "dead water zone" with very low velocity, a large amount of suspended sediment carried from upstream of the pressurized water diversion tunnel settles and accumulates behind the access gates, obstructing their opening. Therefore, the sediment behind the access gates needs to be removed before entering the pressurized tunnel. Utility Model Content

[0004] The purpose of this invention is to provide a dredging device for pressurized tunnel inspection doors to solve the problems raised in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pressurized tunnel inspection door dredging device includes a pressurized tunnel and a construction adit. An inspection door is installed at the exit of the construction adit. A water pump is fixedly installed at one end of the inspection door near the construction adit. The output end of the water pump is connected to a water supply channel connecting to the inside of the inspection door. A water storage plate is connected at the end of the water supply channel away from the water pump. Several first water spray pipes are evenly spaced at the bottom of the water storage plate. A sand accumulation pool is installed below the inspection door inside the pressurized tunnel. A stainless steel frame is installed at the upper end of the sand accumulation pool. A second water spray pipe is fixedly installed on the first water spray pipes.

[0007] In a preferred embodiment, a liquid storage tank is placed inside the construction adit. The bottom end of the liquid storage tank is connected to the input end of a water pump via a liquid delivery hose. A liquid filling port is provided at the top end of the liquid storage tank. Flushing water is stored inside the liquid storage tank. The flushing water is pumped into a spray pipe using a water pump, and the spray pipe is used to flush the sand accumulation pool.

[0008] In a preferred embodiment, the bottom surface of the sand accumulation pool is composed of two inclined surfaces with an obtuse angle. The first water spray pipe is inclined downward, and the second water spray pipe is an arc-shaped structure with the water spray direction of the second water spray pipe inclined upward. The bottom surface of the sand accumulation pool is composed of two inclined surfaces with an obtuse angle, which facilitates sand collection and washing of mud and sand.

[0009] In a preferred embodiment, the stainless steel frame is composed of several stainless steel support frames. The first water spray pipe and the second water spray pipe are arranged between the gaps of the two stainless steel support frames. When the first water spray pipe and the second water spray pipe rotate with the maintenance door, the first water spray pipe and the second water spray pipe can pass through the gaps between the two stainless steel support frames.

[0010] In a preferred embodiment, the bottom end of the water storage plate is provided with a plurality of outlets, the outlets being sealed to the first water spray pipe, and each outlet is provided with a one-way valve, the one-way valves being provided to prevent water or silt from the pressurized tunnel from entering the water storage plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention incorporates a water pump, a water storage plate, a first water spray pipe, a second water spray pipe, and a sand collection pool. The sand collection pool collects mud and sand behind the inspection door. When the inspection door needs to be opened, the water pump draws flushing water into the first and second water spray pipes. The first water spray pipe flushes one end of the sand collection pool, and the second water spray pipe flushes the other end, facilitating the cleaning of mud and sand inside the pool and making it easier to open the inspection door. Furthermore, by placing the water pump at the front of the inspection door, the pump does not need to come into contact with the mud and water inside the pressurized tunnel, resulting in a longer service life. Attached Figure Description

[0013] Figure 1 This is a longitudinal section diagram of the present invention;

[0014] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0015] Figure 3 This is a schematic diagram of the planar structure of this utility model.

[0016] The following are labeled on the map: 1. Pressurized tunnel; 2. Construction adit; 3. Inspection door; 4. Water pump; 5. Water conveyance channel; 6. Water storage plate; 7. First spray pipe; 8. Sand accumulation pool; 9. Stainless steel frame; 10. Second spray pipe; 11. Liquid storage tank; 12. Infusion hose. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Please refer to Figures 1-3 This utility model provides a dredging device for pressurized tunnel inspection doors, and the technical solution is as follows:

[0019] A pressurized tunnel inspection door dredging device includes a pressurized tunnel 1 and a construction adit 2. An inspection door 3 is provided at the exit of the construction adit 2. A water pump 4 is fixedly installed at one end of the inspection door 3 near the construction adit 2. The output end of the water pump 4 is connected to a water supply channel 5 that connects to the inside of the inspection door 3. A water storage plate 6 is connected at the end of the water supply channel 5 away from the water pump 4. Several first water spray pipes 7 are evenly spaced at the bottom end of the water storage plate 6. A sand accumulation pool 8 is provided in the pressurized tunnel 1 below the inspection door 3. A stainless steel frame 9 is provided at the upper end of the sand accumulation pool 8. A second water spray pipe 10 is fixedly installed on the first water spray pipes 8.

[0020] In a preferred embodiment, a liquid storage tank 11 is placed inside the construction adit 2. The bottom end of the liquid storage tank 11 is connected to the input end of the water pump 4 through a liquid infusion hose 12. A liquid filling port is provided at the top end of the liquid storage tank 11, through which flushing liquid is added to the liquid storage tank 11. The liquid storage tank 11 and the water pump 4 are connected by a liquid infusion hose 12 to facilitate the movement of the water pump 4 with the maintenance door 3.

[0021] In a preferred embodiment, the bottom surface of the sand accumulation tank 8 is composed of two obtuse-angled inclined surfaces. The first water spray pipe 7 is inclined downwards, and the second water spray pipe 10 has an arc-shaped structure with its spray direction inclined upwards. The stainless steel frame 9 is composed of several stainless steel support frames, and the first water spray pipe 8 and the second water spray pipe 10 are disposed between the gaps of the two stainless steel support frames. The bottom end of the water storage plate 6 is provided with several outlets, and the outlets are sealed to the first water spray pipe 8. Each of the aforementioned outlets is equipped with a one-way valve. In specific use, the water spray direction of the first water spray pipe 7 is downward, spraying towards the downward inclined surface of the sand accumulation pool 8, while the water spray direction of the second water spray pipe 10 is upward, spraying towards the upward inclined surface of the sand accumulation pool 8. This can better flush away the mud and sand inside the sand accumulation pool 8. The first water spray pipe 7, the second water spray pipe 10, and the stainless steel frame 9 are made of corrosion-resistant materials and are coated with corrosion-resistant paint, which can effectively improve the service life of the first water spray pipe 7, the second water spray pipe 10, and the stainless steel frame 9.

[0022] The working principle of this utility model:

[0023] Normally, the maintenance door 3 is closed, separating the pressurized tunnel 1 from the construction adit 2. Fluid is stored inside the liquid storage tank 11. During normal use, the sediment on the back of the maintenance door 3 accumulates in the sedimentation pool 8. When the maintenance door 3 needs to be opened, the water pump 4 is turned on first. The water pump 4 pumps the flushing fluid from the liquid storage tank 11 through the water delivery channel 5 to the water storage plate 6, and then into the first spray pipe 7 and the second spray pipe 10. High-pressure water is released into the sedimentation pool 8 through the first spray pipe 7 and the second spray pipe 10. The water sprayed from the first water pipe 7 and the second water pipe 10 can wash away the sediment in the sedimentation tank 8. After cleaning away some of the sediment in the sedimentation tank 8, without affecting the opening of the inspection door 3, the water pump 4 is turned off, and the inspection door 3 is pushed from the bottom to the outside to open the inspection door 3. When the inspection door 3 is opened, the first water pipe 7 and the second water pipe 10 are lifted along with the inspection door 3. The first water pipe 7 and the second water pipe 10 pass through the stainless steel frame 9. After the inspection door 3 is opened to a certain angle, people step on the stainless steel frame 9 to enter the pressurized tunnel 1.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressurized tunnel inspection door dredging device, comprising a pressurized tunnel (1) and a construction adit (2), wherein an inspection door (3) is provided at the exit of the construction adit (2), characterized in that: A water pump (4) is fixedly installed at one end of the inspection door (3) near the construction adit (2). The output end of the water pump (4) is connected to a water conveying channel (5) that connects to the inside of the inspection door (3). The end of the water conveying channel (5) away from the water pump (4) is connected to a water storage plate (6). Several first water spray pipes (7) are evenly spaced at the bottom of the water storage plate (6). A sand accumulation pool (8) is set below the inspection door (3) in the pressurized tunnel (1). A stainless steel frame (9) is set at the upper end of the sand accumulation pool (8). A second water spray pipe (10) is fixedly installed on the first water spray pipe (8).

2. The pressurized tunnel inspection door dredging device according to claim 1, characterized in that: The construction adit (2) contains a liquid storage tank (11). The bottom of the liquid storage tank (11) is connected to the input end of the water pump (4) via a liquid delivery hose (12). The top of the liquid storage tank (11) is provided with a liquid filling port.

3. The pressurized tunnel inspection door dredging device according to claim 1, characterized in that: The bottom surface of the sand accumulation pool (8) is composed of two obtuse-angled inclined surfaces. The first water spray pipe (7) is inclined downward, and the second water spray pipe (10) is an arc-shaped structure with the water spray direction of the second water spray pipe (10) inclined upward.

4. The pressurized tunnel inspection door dredging device according to claim 3, characterized in that: The stainless steel frame (9) is composed of several stainless steel support frames, and the first water spray pipe (8) and the second water spray pipe (10) are arranged between the gaps of the two stainless steel support frames.

5. The pressurized tunnel inspection door dredging device according to claim 1, characterized in that: The bottom end of the water storage plate (6) is provided with several outlets, which are sealed to the first water spray pipe (8), and each outlet is provided with a one-way valve.

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