Test drainage device for water diversion system of impact type unit

Abstract

The utility model provides a test drainage device for a water diversion system of an impact type unit. The test drainage device comprises a water intake pipe and a drainage pipe, the electromagnetic hydraulic valve is arranged at the other end of the water taking pipe and is connected with the water taking pipe; the pressure reducing valve is arranged in the machine pit and is connected with one end of the water taking pipe at an interval; the gate valve is arranged opposite to the pressure reducing valve and is communicated with the pressure reducing valve through a pipeline; the rear bent pipe is connected to one end of the gate valve; the other end of the water taking pipe extends to the ground, and an obtuse included angle is formed between the water taking pipe and the axis of the pressure reducing valve. The test drainage device for the water diversion system of the impact type unit is simple in structure, low in cost, flexible, good in safety and capable of well controlling the average drainage flow, and the brake water spraying pipeline of the impact type unit is utilized.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a test drainage device for an impact type unit water diversion system. Background Art

[0002] After the installation of the impulse unit water diversion system is completed, a filling and drainage test is required according to the specifications. At this time, the unit has not been installed or debugged yet, and the water cannot be drained through the unit's no-load overcurrent operation. The conventional design is to conduct a test drainage through a needle valve drainage pipeline before the water inlet valve, but the needle valve is expensive and is basically of little use after the unit is put into operation, resulting in a certain waste of investment.

[0003] According to the analysis of the patents that have been published in China, there is no tailwater pipe hoisting device and method in the tunnel with simple structure, convenient operation and wide application range. Chinese utility model patent CN201420818650 discloses "a drainage structure of a water diversion system", which includes: a water diversion system arranged in the mountain, the outer surface of the water diversion system is wrapped with a layer of steel pipe backfill concrete, and a number of drainage holes are arranged around the backfill concrete of the pipe, and crisscrossing annular drainage blind materials and longitudinal drainage blind materials are arranged around the steel pipe backfill concrete; the drainage holes, annular drainage blind materials and longitudinal drainage blind materials are staggered to form a drainage network. This utility model solves the improvement of the high external water drainage measures of the water diversion system, and does not involve the test drainage of the water delivery system.

[0004] Chinese invention patent CN201610823345 discloses "an upper reservoir filling and drainage system". The purpose of the invention is to provide a safe and reliable upper reservoir filling and drainage system, which provides a reliable debugging and test water source and drainage method for the test of the water delivery system of the pumped storage power station and the initial startup and commissioning of the unit. It is characterized in that the system is arranged in the volute layer unit section of the underground powerhouse of the pumped storage power station. The system has two sets of parallel connected filling and drainage units, each of which is composed of a filling pump, a slow-closing check valve, at least one turbine worm gear transmission valve, a normally open manual valve and a bypass drainage needle valve. The invention is suitable for pumped storage power stations. The invention requires a large layout space, complex equipment composition, and large investment. Utility Model Content

[0005] The utility model aims to solve the problem of drainage during the test of the water diversion system of an impact type unit and provides a drainage device for the test of the water diversion system of an impact type unit, which has a simple structure, an easy method to implement, convenient operation and strong applicability.

[0006] To achieve the above-mentioned purpose, the utility model provides an impact unit water diversion system test drainage device comprising: a water intake pipe with one end extending obliquely downward to the ground;

[0007] an electromagnetic hydraulic valve disposed on the other end of the water intake pipe and connected to the electromagnetic hydraulic valve;

[0008] A pressure reducing valve arranged in the machine pit and connected to one end of the water intake pipe at an interval;

[0009] a gate valve arranged opposite to the pressure reducing valve and connected to the pressure reducing valve through a pipeline;

[0010] and a rear bend pipe connected to one end of the gate valve;

[0011] The other end of the water intake pipe extends to the ground, and an obtuse angle is formed between the water intake pipe and the axis of the pressure reducing valve.

[0012] Furthermore, a brake hydraulic valve is arranged at one end of the water intake pipe extending out of the ground.

[0013] Furthermore, one end of the water intake pipe is connected to a front bend pipe, and one end of the front bend pipe is spaced apart from the pressure reducing valve.

[0014] Furthermore, one end of the front curved pipe is connected to a diffuser pipe, and the expanded diameter end of the diffuser pipe is connected to the pressure reducing valve.

[0015] Furthermore, a connecting pipe is arranged between the pressure reducing valve and the gate valve, and two ends of the connecting pipe are respectively connected to the pressure reducing valve and the connecting pipe.

[0016] Furthermore, it also includes a supporting structure, which is arranged in the machine pit and is hollow inside, and the pressure reducing valve and the gate valve are both arranged inside the supporting structure.

[0017] Furthermore, the supporting structure is specifically a box body with a rectangular cross section, which is used to protect the device arranged inside it.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The test drainage device of the impulse unit water diversion system has a simple structure and utilizes the brake water spray pipeline of the impulse unit. It is low-cost, flexible, safe, and can better control the average drainage flow rate;

[0020] 2. This product has a wide range of applications. Regardless of the capacity and size of the unit, the lifting device can withstand it, and it has wide applicability and good economy.

[0021] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a partial structural schematic diagram of the utility model.

[0024] In the figure: 1. electromagnetic hydraulic valve; 2. front bend pipe; 3. diffuser; 4. pressure reducing valve; 5. connecting pipe; 6. supporting structure; 7. gate valve; 8. rear bend pipe; 9. water intake pipe. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0026] Reference Figure 1-2 As shown, a test drainage device for the water diversion system of an impact unit comprises: a water intake pipe 9 with one end extending obliquely downward to the ground; an electromagnetic hydraulic valve 1 arranged on the other end of the water intake pipe 9 and connected to the electromagnetic hydraulic valve 1; a pressure reducing valve 4 arranged in a machine pit (in the machine pit of the impact unit) and connected to one end of the water intake pipe 9 at intervals; a gate valve 7 arranged opposite to the pressure reducing valve 4 and connected to the pressure reducing valve 4 through a pipeline; and a rear bend pipe 8 connected to one end of the gate valve 7; the other end of the water intake pipe 9 extends to the ground, and an obtuse angle is formed between the water intake pipe 9 and the axis of the pressure reducing valve 4; a brake hydraulic valve is arranged at one end of the water intake pipe 9 extending out of the ground; one end of the water intake pipe 9 is connected to a front bend pipe 2, and one end of the front bend pipe 2 is connected to the pressure reducing valve 4 at intervals; one end of the front bend pipe 2 is connected to a diffuser 3, and the expanded end of the diffuser 3 is connected to the pressure reducing valve 4; a connecting pipe 5 is arranged between the pressure reducing valve 4 and the gate valve 7, and the two ends of the connecting pipe 5 are respectively connected to the pressure reducing valve 4 and the connecting pipe 5.

[0027] The utility model provides a technical solution. When in use, first open the gate valve 7 to 50% of the opening, then open the electromagnetic hydraulic valve 1, adjust the opening size of the gate valve 7, make the drainage speed reach the appropriate flow rate, then fix the opening, control the continuous opening time of the electromagnetic hydraulic valve 1, and keep the water diversion tunnel test drainage flow rate in an appropriate state. The impact unit brake water pipeline is used to play the role of energy dissipation and pressure reduction drainage, and save additional high-pressure needle valves. The test drainage device uses the electromagnetic hydraulic valve on the existing unit brake water pipeline, saving expensive high-pressure needle valves, can be controlled according to the drainage speed, and has good safety. The method is simple and easy to implement, and is very suitable for construction sites. It can effectively solve the problem of impact unit water diversion tunnel test drainage in actual engineering, and the test drainage is placed in other units of the same water delivery system, which does not interfere with the commissioning of the first unit.

[0028] Preferably: it also includes a support structure 6, which is arranged in the pit and is hollow inside, and the pressure reducing valve 4 and the gate valve 7 are both arranged inside the support structure 6; the support structure 6 is specifically a box with a rectangular cross-section, which is used to protect the device arranged inside it.

[0029] Specifically, the support structure 6 can protect the pressure reducing valve 4, the connecting pipe 5, the gate valve, and the rear bend pipe 8 from being damaged, thereby effectively extending the service life of the device. The support structure 6 can be formed by assembling steel plates or bricks or other materials.

[0030] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A test drainage device for a water diversion system of an impulse unit, characterized in that: include: A water intake pipe (9) with one end extending obliquely downward to the ground; an electromagnetic hydraulic valve (1) arranged on the other end of the water intake pipe (9) and connected to the electromagnetic hydraulic valve (1); A pressure reducing valve (4) arranged in the machine pit and spaced apart from one end of the water intake pipe (9); a gate valve (7) arranged opposite to the pressure reducing valve (4) and connected to the pressure reducing valve (4) through a pipeline; and a rear bend pipe (8) connected to one end of the gate valve (7); The other end of the water intake pipe (9) extends to the ground, and an obtuse angle is formed between the water intake pipe (9) and the axis of the pressure reducing valve (4).

2. The test drainage device for the water diversion system of an impulse unit according to claim 1, characterized in that: A brake hydraulic valve is arranged at one end of the water intake pipe (9) extending out of the ground.

3. The test drainage device for the water diversion system of an impulse unit according to claim 1, characterized in that: One end of the water intake pipe (9) is connected to a front bend pipe (2), and one end of the front bend pipe (2) is spaced apart from the pressure reducing valve (4).

4. The test drainage device for the water diversion system of an impulse unit according to claim 3, characterized in that: One end of the front curved pipe (2) is connected to a diffuser pipe (3), and the expanded diameter end of the diffuser pipe (3) is connected to the pressure reducing valve (4).

5. The test drainage device for the water diversion system of an impulse unit according to claim 1, characterized in that: A connecting pipe (5) is arranged between the pressure reducing valve (4) and the gate valve (7), and two ends of the connecting pipe (5) are respectively connected to the pressure reducing valve (4) and the connecting pipe (5).

6. The test drainage device for the water diversion system of an impulse unit according to claim 1, characterized in that: It also comprises a supporting structure (6), which is arranged in the machine pit and is hollow inside, and the pressure reducing valve (4) and the gate valve (7) are both arranged inside the supporting structure (6).

7. The test drainage device for the water diversion system of an impulse unit according to claim 6, characterized in that: The supporting structure (6) is specifically a box body with a rectangular cross section, which is used to protect the device arranged inside it.

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