CN219550270U

CN219550270U - Automatic air supplementing device for pressure oil groove of hydropower station

Info

Publication number: CN219550270U
Application number: CN202320188620.7U
Authority: CN
Inventors: 谭亮
Original assignee: Hunan Zhijiang Mangtangxi Water Conservancy And Hydropower Development Co ltd
Current assignee: Hunan Zhijiang Mangtangxi Water Conservancy And Hydropower Development Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-08-18
Anticipated expiration: 2033-02-10

Abstract

The utility model relates to a gas supplementing device, in particular to an automatic gas supplementing device for a pressure oil tank of a hydropower station, which comprises an automatic gas supplementing pipeline, a manual gas supplementing pipeline and an exhaust pipeline, wherein the manual gas supplementing pipeline and the exhaust pipeline are arranged on the automatic gas supplementing pipeline; the automatic air supplementing pipeline is sequentially provided with a filter, a first normally-open ball valve, a two-position three-way electromagnetic valve, a first one-way valve and a second normally-open ball valve; one end of the manual air supplementing pipeline is communicated with the rear end of a filter of the automatic air supplementing pipeline, the other end of the manual air supplementing pipeline is communicated with the front end of a valve of a second normally-open ball valve of the automatic air supplementing pipeline, and a first normally-closed ball valve is arranged on the manual air supplementing pipeline; the exhaust pipeline is arranged behind the valve of the second normally-open ball valve, the exhaust pipeline is sequentially provided with a second normally-closed ball valve and a three-way valve, and the other port of the three-way valve is connected with an exhaust port of the two-position three-way electromagnetic valve. Compared with the prior art, the utility model adopts two electric valves to carry out the cooperation control, has more simplified structure and lower failure rate, and ensures more reliable air supplement.

Description

Automatic air supplementing device for pressure oil groove of hydropower station

Technical Field

The utility model relates to a gas supplementing device, in particular to an automatic gas supplementing device for a pressure oil tank of a hydropower station.

Background

The hydraulic device of the hydraulic turbine speed regulating system of the hydropower station is an indispensable important auxiliary device of a hydraulic turbine unit, can generate and store high-pressure oil, and is an energy source for operation such as starting, stopping and load adjustment of the unit. In order to ensure and maintain the working capacity required by the operation of the unit, the ratio of the compressed air to the turbine oil in the pressure oil groove is 2:1, and the hydraulic pressure is continuously provided for the servomotor by utilizing the retractility of the compressed air, so that the oil and the gas in the pressure oil groove are required to be always kept at a certain ratio; with frequent operation of the servomotor, the compressed air is gradually lost, and the compressed air needs to be periodically replenished, so that a pressure oil groove air replenishing device is generated.

The structure of the existing automatic air supplementing device is shown in the attached figure 2 of the specification, and the working principle is as follows: automatic air supply: when the air supplementing signal is received, the electric valve b is opened to be communicated with an air source, at the moment, the electric valve e is closed, the normally closed ball valves d and f are closed, compressed air is supplemented to the pressure oil tank through the filter a, the electric valve b and the one-way valve c, after the air supplementing is finished, the electric valve b is closed, the electric valve e is opened, and a pipe section between the electric valve b and the one-way valve c is emptied to normal pressure, so that the tightness of the one-way valve is improved. Manual air supply: the normally closed ball valve d is opened or closed to realize manual air supplementing, and when the manual air supplementing is carried out, the electric valve b is ensured to be in a closed state. Overhauling and exhausting: when the high-pressure gas is required to be discharged during maintenance, the normally closed ball valve f is opened to realize the pressure relief of the pressure oil tank. In order to reduce noise during exhaust, a muffler g is provided in the exhaust pipe of the electric valve e and the normally closed ball valve f. The existing automatic air supplementing device is provided with two electric valves for control, the control loop needs to control the two electric valves in a matching way, the problem that a control structure is responsible exists, and the more electric control elements are, the greater the probability of faults is; therefore, it is necessary to simplify the automatic air supply device and improve the reliability of the air supply device. In addition, the existing automatic air supplementing device has a complex exhaust structure, and needs to be independently provided with automatic air supplementing exhaust and maintenance exhaust, and noise reduction treatment is respectively carried out.

Disclosure of Invention

The utility model aims to solve the technical problems existing in the prior art. Therefore, the automatic air supplementing device for the hydropower station pressure oil groove is simpler in structure, more reliable in air supplementing and more reasonable in exhaust structure design.

The technical scheme adopted for solving the technical problems is as follows:

the automatic air supplementing device for the pressure oil tank of the hydropower station comprises an automatic air supplementing pipeline, a manual air supplementing pipeline and an exhaust pipeline, wherein the manual air supplementing pipeline and the exhaust pipeline are arranged on the automatic air supplementing pipeline; the automatic air supplementing pipeline is sequentially provided with a filter, a first normally-open ball valve, a two-position three-way electromagnetic valve, a first one-way valve and a second normally-open ball valve; one end of the manual air supplementing pipeline is communicated with the rear end of a filter of the automatic air supplementing pipeline, the other end of the manual air supplementing pipeline is communicated with the front end of a valve of a second normally-open ball valve of the automatic air supplementing pipeline, and a first normally-closed ball valve is arranged on the manual air supplementing pipeline; the exhaust pipeline is arranged behind the valve of the second normally-open ball valve, the exhaust pipeline is sequentially provided with a second normally-closed ball valve and a three-way valve, and the other port of the three-way valve is connected with the exhaust port of the two-position three-way electromagnetic valve.

In a preferred embodiment of the present utility model, the manual air supply pipeline is further provided with a second one-way valve positioned behind the valve of the first normally-closed ball valve.

In a preferred embodiment of the present utility model, a throttle valve is further provided in front of the second check valve.

In a preferred embodiment of the utility model, the exhaust line is further provided with a muffler located behind the valve of the three-way valve.

In a preferred embodiment of the utility model, the front end of the silencer is also provided with a throttle valve.

In a preferred embodiment of the present utility model, the first normally-open ball valve, the second normally-open ball valve, the first normally-closed ball valve and the second normally-closed ball valve all adopt high-pressure ball valves.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model realizes automatic air supply of the air supply pipeline and evacuation of the front pipeline of the first one-way valve to normal pressure by using the two-position three-way electromagnetic valve, and compared with the mode of adopting two electric valves to carry out matched control in the prior art, the utility model has the advantages of more simplified structure, lower failure rate and more reliable air supply.

2. The utility model combines the overhaul exhaust and the exhaust port of the two-position three-way electromagnetic valve by utilizing the three-way valve, and solves the problem that the existing automatic air supplementing device needs to be provided with an automatic air supplementing exhaust pipeline and an overhaul exhaust pipeline independently and respectively carries out noise reduction treatment.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic diagram of the automatic air supply device of the hydropower station pressure oil tank;

fig. 2 is a schematic structural diagram of an automatic air supplementing device for a pressure oil tank of a conventional hydropower station.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

The embodiment provides an automatic air supplementing device for a hydropower station pressure oil groove, which is shown in an attached figure 1 and comprises an automatic air supplementing pipeline, a manual air supplementing pipeline and an exhaust pipeline, wherein the manual air supplementing pipeline and the exhaust pipeline are arranged on the automatic air supplementing pipeline.

The automatic air supplementing pipeline is sequentially provided with a filter 1, a first normally-open ball valve 2, a two-position three-way electromagnetic valve 3, a first one-way valve 4 and a second normally-open ball valve 5. In the embodiment, the two-position three-way electromagnetic valve adopts a normally closed type, as shown in fig. 1, the air inlet is P, the air outlet is A, the air outlet is B, and in a normal state, the air outlet A and the air outlet B are communicated; when the two-position three-way electromagnetic valve receives an automatic air supplementing signal, the air inlet P is communicated with the air outlet B, and the air outlet B is disconnected with the air outlet A, so that automatic air supplementing is realized; after the air supplementing is completed, the two-position three-way electromagnetic valve is powered off and reset, and at the moment, the air outlet A and the air outlet B are communicated to empty the front pipeline of the check valve to normal pressure, so that the sealing performance of the check valve is improved.

One end of the manual air supplementing pipeline is communicated with the rear end of the filter 1 of the automatic air supplementing pipeline, the other end of the manual air supplementing pipeline is communicated with the front end of the valve of the second normally-open ball valve 5 of the automatic air supplementing pipeline, and the manual air supplementing pipeline is provided with a first normally-closed ball valve 6. The first normally closed ball valve is manually controlled to be opened or closed to realize manual air supplement to the pressure oil tank. Further, in this embodiment, a second one-way valve 7 is further disposed behind the valve of the first normally closed ball valve 6 on the manual air supplementing pipeline, so as to prevent the abnormality of manual air supplementing caused by the abnormality of the pressure in the pressure oil tank. Further, in this embodiment, a throttle valve 8 is further disposed in front of the second check valve 7, so as to adjust the flow of the make-up air.

The exhaust pipeline is arranged behind the valve of the second normally-open ball valve 5, a second normally-closed ball valve 9 and a three-way valve 10 are sequentially arranged on the exhaust pipeline, and the other port of the three-way valve 10 is connected with the exhaust port of the two-position three-way electromagnetic valve 3. The utility model combines the maintenance exhaust and the exhaust port of the two-position three-way electromagnetic valve by the three-way valve, and the exhaust is carried out through the exhaust pipe behind the three-way valve no matter the exhaust during automatic air supplementing or the pressure elimination during maintenance, so that the exhaust pipe is only required to be noise-reduced, and the muffler 11 is only required to be arranged behind the valve of the three-way valve 10 on the exhaust pipeline. The normal state of the three-way valve in the embodiment is to conduct the exhaust port and the exhaust pipe of the two-position three-way electromagnetic valve, so that the normal operation of automatic air supplementing and exhausting is not influenced; when the maintenance and the exhaust are carried out, the three-way valve is switched, the second normally-closed ball valve is opened, and the pressure relief of the pressure oil tank is completed. Further, in this embodiment, a throttle valve 8 is further provided at the front end of the muffler 11, so that the exhaust flow rate can be adjusted.

Preferably, the first normally open ball valve 2, the second normally open ball valve 5, the first normally closed ball valve 6 and the second normally closed ball valve 9 in this embodiment all adopt high-pressure ball valves.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.

Claims

1. An automatic air supplement unit of power station pressure oil groove, its characterized in that: comprises an automatic air supplementing pipeline, a manual air supplementing pipeline and an exhaust pipeline, wherein the manual air supplementing pipeline is arranged on the automatic air supplementing pipeline;

the automatic air supplementing pipeline is sequentially provided with a filter, a first normally-open ball valve, a two-position three-way electromagnetic valve, a first one-way valve and a second normally-open ball valve;

one end of the manual air supplementing pipeline is communicated with the rear end of a filter of the automatic air supplementing pipeline, the other end of the manual air supplementing pipeline is communicated with the front end of a valve of a second normally-open ball valve of the automatic air supplementing pipeline, and a first normally-closed ball valve is arranged on the manual air supplementing pipeline;

the exhaust pipeline is arranged behind the valve of the second normally-open ball valve, the exhaust pipeline is sequentially provided with a second normally-closed ball valve and a three-way valve, and the other port of the three-way valve is connected with the exhaust port of the two-position three-way electromagnetic valve.

2. The automatic air supply device for a pressure oil tank of a hydropower station according to claim 1, wherein: the manual air supplementing pipeline is further provided with a second one-way valve positioned behind the valve of the first normally-closed ball valve.

3. The automatic air supply device for a pressure oil tank of a hydropower station according to claim 2, wherein: and a throttle valve is arranged in front of the second one-way valve.

4. The automatic air supply device for a pressure oil tank of a hydropower station according to claim 1, wherein: and the exhaust pipeline is positioned behind the three-way valve and is also provided with a silencer.

5. The automatic air supply device for a pressure oil tank of a hydropower station according to claim 4, wherein: the front end of the silencer is also provided with a throttle valve.

6. The automatic air supply device for a pressure oil tank of a hydropower station according to any one of claims 1 to 5, wherein: the first normally-open ball valve, the second normally-open ball valve, the first normally-closed ball valve and the second normally-closed ball valve all adopt high-pressure ball valves.