Bypass flat pressing device

Abstract

The utility model provides a bypass flat pressing device, which relates to the technical field of gates of water conservancy and hydropower engineering, and comprises two sets of water filling pipelines, an upstream water inlet pipeline and a downstream water outlet pipeline, the upstream water inlet pipeline is arranged on a top cover plate of an emergency gate, and the downstream water outlet pipeline is arranged above a cavity between the emergency gate and a service gate; an overhaul gate valve is assembled on the upstream water inlet pipeline, and a working gate valve is assembled on the downstream water outlet pipeline; a telescopic joint is connected between the overhaul gate valve and the working gate valve; and the differential pressure gauge is arranged between the upstream water inlet pipeline and the downstream water outlet pipeline and is connected with the differential pressure monitoring system. The problems that an original water filling valve is large in appearance size, heavy in weight, high in manufacturing difficulty, difficult to transport and the like are solved, the water filling valve is not high in reliability, the sealing is not tight, a large amount of water leaks easily, and water filling pipelines with multiple elevations do not exist on the upstream face above a lock chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering gates, in particular to a bypass pressure-equalizing device. Background Art

[0002] In water conservancy projects such as hydropower stations and reservoirs, when the working gate is used in conjunction with the inspection gate or the emergency gate, when the working gate needs to be inspected or fails, the inspection gate or the emergency gate needs to be lowered to repair and maintain the working gate. After the maintenance work is completed, the inspection gate and the emergency gate need to be leveled before they can be opened. Therefore, a work of filling the horizontal pressure needs to be added between the two. This work is usually done by adding a filling valve on the upper part of the inspection gate or the emergency gate. Through time measurement or differential pressure gauge, it is judged that the upstream and downstream pressure difference of the gate meets the conditions for opening the gate before the inspection gate or the emergency gate can be opened. Or according to the concrete structure where the gate is located, the concrete structure is constructed from the bottom of the emergency gate to the highest water level of the upstream reservoir area, and the corresponding elevation of the water inlet pipe is arranged on the water-facing surface of the concrete structure to meet the water filling requirements at different water levels.

[0003] Firstly, adding a filling valve to the upper part of the gate requires a more complex structure, which is composed of a filling valve body, a stroke limiting device, a hanging shaft device, etc. It has large dimensions, heavy weight, high manufacturing difficulty, and difficult transportation. In addition, the reliability of the filling valve is not high, and it is easy to have loose closure and large amounts of water leakage, which seriously affects the maintenance of the downstream working gate.

[0004] Secondly, there is also a method of arranging water inlet pipes of different elevations on the water-facing surface of the concrete structure of the gate chamber of the discharge structure to meet the water filling requirements between the gates. This method is based on the situation that the accident gate and the working gate are both located below the dam, and the concrete structure is basically at the same elevation as the dam. One side of the structure is connected to the upstream reservoir area. This is a prerequisite for adopting this solution and has limitations. When affected by the terrain, the gate chambers of the accident gate and the working gate cannot be directly arranged below the dam, such as rockfill dams, and the height of the discharge structure is much lower than the dam height. The concrete structure established after the upstream water is led to the downstream position through the pressure pipe will not be applicable.

[0005] For example, in the patent document, the publication date is March 23, 2016, the publication number is CN105421313A, and the name is a method and device for horizontal pressure charging of ultra-high head gates. According to the amplitude of the normal water storage level and the dead water level, a group of evenly distributed bypass pipes are arranged vertically on the discharge structure, and each bypass pipe is provided with a working valve. The outlet of each working valve converges into a main pipe, and the water is led to the discharge tunnel between the emergency gate and the arc gate through the main pipe; when the emergency gate needs to be opened, the working valve at the nearest position at its lower part is opened according to the reservoir water level elevation to achieve the horizontal pressure charging of the gate. Utility Model Content

[0006] In order to solve the deficiencies of the prior art, the utility model provides a high-head emergency gate bypass pressure-equalizing device, which aims to solve the problems that the original water filling valve has large dimensions, heavy weight, high manufacturing difficulty, and difficult transportation. In addition, the reliability of the water filling valve is not high, and it is easy to have loose sealing and a large amount of water leakage. There is no situation where multiple water filling pipelines with different elevations are arranged on the water-facing surface above the gate chamber.

[0007] The utility model is realized by the following technical solutions:

[0008] A bypass pressure equalization device, characterized in that it comprises a bypass pipeline water filling device, a differential pressure gauge, and a differential pressure monitoring system, wherein the bypass pipeline water filling device is arranged on the top of the discharge structure, on a platform between the accident gate and the working gate chamber; the bypass pipeline water filling device comprises two sets of water filling pipelines, namely an upstream water inlet pipeline and a downstream water outlet pipeline; the upstream water inlet pipeline is arranged on the top cover plate of the accident gate, and the downstream water outlet pipeline is arranged above the cavity between the accident gate and the working gate; an inspection gate valve and a working gate valve are installed between the upstream water inlet pipeline and the downstream water outlet pipeline, and an expansion joint is connected between the inspection gate valve and the working gate valve; the differential pressure gauge is arranged between the upstream water inlet pipeline and the downstream water outlet pipeline, and is connected to the differential pressure monitoring system, and when the gate valve is opened, the upstream water passes through the upstream water inlet pipeline, the inspection gate valve, the working gate valve, and the downstream water outlet pipeline into the cavity between the accident gate and the working gate, and the differential pressure monitoring system monitors the pressure before and after the accident gate through the differential pressure gauge to give a pressure equalization signal.

[0009] Furthermore, the installation height of the bypass pipeline water filling device is less than the water level elevation upstream of the emergency gate.

[0010] Furthermore, the bypass pipe water filling device also includes a bend pipe 1 and a bend pipe 2, one end of the bend pipe 1 is connected to the upstream water inlet pipe, and the other end of the bend pipe 1 is connected to the maintenance gate valve via a connecting flange and bolts; the maintenance gate valve is connected to one end of the expansion joint via a connecting flange, and the other end of the expansion joint is connected to the working gate valve via a connecting flange; one end of the bend pipe 2 is connected to the working gate valve via a connecting flange and bolts, and the other end of the bend pipe 2 is connected to the downstream water outlet pipe.

[0011] Furthermore, the upstream water inlet pipeline is welded to the first elbow; and the downstream water outlet pipeline is welded to the second elbow.

[0012] Furthermore, the water filling pipeline is set with a diameter according to the flat-pressure space to be filled and the required filling time.

[0013] Furthermore, the inspection gate valve and the working gate valve are electric gate valves.

[0014] Furthermore, the inspection gate valve and the working gate valve are manual gate valves.

[0015] Furthermore, the inspection gate valve and the electric working gate valve are gate valves or ball valves made of stainless steel.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. In the utility model, two sets of water filling pipelines and two gate valves are arranged, so that the filling level pressure is realized simply and lightly.

[0018] 2. In the utility model, the installation height of the bypass pipeline water filling device is lower than the water level elevation upstream of the emergency gate, making the water level filling more simple, efficient and safe.

[0019] 3. In the present utility model, a maintenance gate valve is provided to provide maintenance conditions for the working gate valve.

[0020] 4. In the utility model, the expansion joint is provided to facilitate the installation of the inspection gate valve and the working gate valve as well as the subsequent maintenance and inspection.

[0021] 5. In the present invention, a differential pressure gauge and a differential pressure monitoring system are provided to monitor the water pressure in real time and accurately, and give a pressure equalization signal in time to open the emergency gate.

[0022] 6. In the present invention, the diameter of the water filling pipeline is set according to the flat pressure space to be filled and the required filling time.

[0023] 7. The utility model has simple results, simple operation, easy maintenance and overhaul, and simplified control measures.

[0024] Therefore, the utility model solves the problems of the original water filling valve having large dimensions, heavy weight, high manufacturing difficulty, and difficult transportation. The water filling valve is also not reliable, is prone to poor sealing, and is prone to large amounts of water leakage. It also does not have the ability to arrange multiple water filling pipelines at different elevations on the water-facing surface above the gate chamber. The utility model provides a new type of water filling level pressure method, which makes the water filling level pressure simple and lightweight to achieve, improves the water sealing effect, reduces manufacturing and transportation costs, and has a wide range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the layout of the utility model;

[0026] Figure 2 This is a schematic diagram of the plan layout of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the utility model.

[0028] Figure numerals: 1-bypass pipeline water filling device, 2-accident gate, 3-working gate, 4-upstream water inlet pipeline, 5-downstream water outlet pipeline, 6-maintenance gate valve, 7-working gate valve, 8-connecting flange, 9-elbow one, 10-elbow two, 11-expansion joint, 12-hydraulic opening and closing machine for accident gate, 13-hydraulic opening and closing machine for working gate, 14-hydraulic pump station. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings of the utility model specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1

[0031] Refer to the instruction manual Figure 1-3 As shown, a bypass pressure equalization device includes a bypass pipeline water filling device 1, a differential pressure gauge, and a differential pressure monitoring system. The bypass pipeline water filling device 1 is arranged on the top of the discharge structure, located on a platform between the accident gate 2 and the working gate 3; the bypass pipeline water filling device 1 includes two sets of water filling pipelines, an upstream water inlet pipeline 4 and a downstream water outlet pipeline 5; the upstream water inlet pipeline 4 is arranged on the top cover plate of the accident gate 2, and the downstream water outlet pipeline 5 is arranged above the cavity between the accident gate 2 and the working gate 3; the upstream water inlet pipeline 4 and the downstream water outlet pipeline 5 are arranged on the top cover plate of the accident gate 2. A maintenance gate valve 6 and a working gate valve 7 are installed between the downstream water outlet pipeline 5, and an expansion joint 11 is connected between the maintenance gate valve 6 and the working gate valve 7; the differential pressure gauge is arranged between the upstream water inlet pipeline 4 and the downstream water outlet pipeline 5, and is connected to the differential pressure monitoring system. When the gate valve is opened, the upstream water passes through the upstream water inlet pipeline 4, the maintenance gate valve 6, the working gate valve 7, and the downstream water outlet pipeline 5 into the cavity between the accident gate 2 and the working gate 3. The differential pressure monitoring system monitors the pressure before and after the accident gate 2 through the differential pressure gauge and gives a flat pressure signal.

[0032] In this embodiment, the upstream water inlet pipeline 4 is arranged on the top cover plate of the accident gate 2, and the downstream water outlet pipeline 5 is arranged above the cavity between the accident gate 2 and the working gate 3. The upstream water inlet pipeline 4 and the downstream water outlet pipeline 5 are connected and controlled by setting a gate valve. Without opening the hydraulic hoist 12 of the accident gate, the gate valve is opened in advance to fill the water level. The upstream water passes through the upstream water inlet pipeline 4, the maintenance gate valve 6, the working gate valve 7, and the downstream water outlet pipeline 5 to enter the cavity between the accident gate 2 and the working gate 3. The pressure difference monitoring system monitors the pressure before and after the accident gate 2 through the pressure difference gauge to give a pressure leveling signal. This makes the filling of water level simple and lightweight, improves the sealing effect, and reduces the manufacturing cost and transportation cost.

[0033] Example 2

[0034] This embodiment further elaborates and supplements the implementation method of the utility model on the basis of Embodiment 1.

[0035] As an implementation method of this embodiment, the installation height of the bypass pipeline water filling device 1 is less than the water level elevation upstream of the emergency gate 2, so that the water pressure filling is simpler, more efficient and safer.

[0036] Refer to the instruction manual Figure 3 As shown, as another implementation of this embodiment, the bypass pipe water filling device 1 also includes an elbow 1 9 and an elbow 2 10, one end of the elbow 1 9 is connected to the upstream water inlet pipe, and the other end of the elbow 1 9 is connected to the inspection gate valve 6 through the connecting flange 8 and bolts; the inspection gate valve 6 is connected to one end of the expansion joint 11 through the connecting flange 8, and the other end of the expansion joint 11 is connected to the working gate valve 7 through the connecting flange 8; one end of the elbow 2 10 is connected to the working gate valve 7 through the connecting flange 8 and bolts, and the other end of the elbow 2 10 is connected to the downstream water outlet pipe 5. The whole device is tightly closed, stable and reliable, and there will be no large amount of water leakage.

[0037] As another implementation of this embodiment, the upstream water inlet pipeline 4 is welded to the elbow 1 9 ; the downstream water outlet pipeline 5 is welded to the elbow 2 10 .

[0038] Example 3

[0039] This embodiment further elaborates and supplements the present invention on the basis of Embodiment 1 or Embodiment 2.

[0040] As an implementation mode of this embodiment, the water filling pipeline is set with a diameter according to the flat-pressure space to be filled and the required filling time.

[0041] As an example, the water filling pipeline may also adopt the same water filling diameter as that of the water filling valve.

[0042] As another implementation of this embodiment, the inspection gate valve 6 and the working gate valve 7 are electric gate valves or manual gate valves.

[0043] As another implementation of this embodiment, the inspection gate valve 6 and the electric working gate valve 7 are gate valves or ball valves made of stainless steel.

Claims

1. A bypass pressure equalization device, characterized in that: The invention comprises a bypass pipeline water filling device (1), a differential pressure gauge, and a differential pressure monitoring system. The bypass pipeline water filling device (1) is arranged on the top of the discharge structure, located on a platform between the accident gate (2) and the working gate (3) chambers; the bypass pipeline water filling device (1) comprises two sets of water filling pipelines, namely an upstream water inlet pipeline (4) and a downstream water outlet pipeline (5); the upstream water inlet pipeline (4) is arranged on the top cover plate of the accident gate (2), and the downstream water outlet pipeline (5) is arranged above the cavity between the accident gate (2) and the working gate (3); the upstream water inlet pipeline (4) and the downstream water outlet pipeline (5) are connected to each other. ) are provided with an inspection gate valve (6) and a working gate valve (7), and an expansion joint (11) is connected between the inspection gate valve (6) and the working gate valve (7); the differential pressure gauge is arranged between the upstream water inlet pipeline (4) and the downstream water outlet pipeline (5), and is connected to the differential pressure monitoring system. When the gate valve is opened, upstream water passes through the upstream water inlet pipeline (4), the inspection gate valve (6), the working gate valve (7), and the downstream water outlet pipeline (5) and enters the cavity between the accident gate (2) and the working gate (3). The differential pressure monitoring system monitors the pressure before and after the accident gate (2) through the differential pressure gauge and gives a flat pressure signal.

2. A bypass pressure equalization device according to claim 1, characterized in that: The installation height of the bypass pipeline water filling device (1) is lower than the water level elevation upstream of the emergency gate (2).

3. A bypass pressure equalization device according to claim 1, characterized in that: The bypass pipeline water filling device (1) further comprises an elbow pipe (9) and an elbow pipe (10); one end of the elbow pipe (9) is connected to an upstream water inlet pipe, and the other end of the elbow pipe (9) is connected to a maintenance gate valve (6) via a connecting flange (8) and bolts; the maintenance gate valve (6) is connected to one end of the expansion joint (11) via a connecting flange (8), and the other end of the expansion joint (11) is connected to a working gate valve (7) via a connecting flange (8); one end of the elbow pipe (10) is connected to the working gate valve (7) via a connecting flange (8) and bolts, and the other end of the elbow pipe (10) is connected to a downstream water outlet pipeline (5).

4. A bypass pressure equalization device according to claim 3, characterized in that: The upstream water inlet pipeline (4) is welded to the first elbow (9); and the downstream water outlet pipeline (5) is welded to the second elbow (10).

5. A bypass pressure equalization device according to any one of claims 1 to 4, characterized in that: The diameter of the water filling pipeline is set according to the flat pressure space to be filled and the required filling time.

6. A bypass pressure equalization device according to claim 5, characterized in that: The inspection gate valve (6) and the working gate valve (7) are electric gate valves.

7. A bypass pressure equalization device according to claim 5, characterized in that: The inspection gate valve (6) and the working gate valve (7) are manual gate valves.

8. The bypass pressure equalization device according to claim 5, characterized in that: The inspection gate valve (6) and the electric working gate valve (7) are gate valves or ball valves made of stainless steel.

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