Water permeation alarm device for floating ball type vacuum breaker valve

Abstract

The utility model discloses a water permeation alarm device for a floating ball type vacuum breaker valve. The efficiency of distinguishing the working condition of the floating ball type vacuum breaking valve by means of visual observation of inspection personnel is very low, and the requirements of automation and informatization of hydropower stations in the new era cannot be met. The valve comprises a valve body, a valve plate and a floating ball located in the valve body, a water retaining protection plate is arranged on the upper portion of the valve body, the two sides of the water retaining protection plate are respectively connected with at least two connecting bolts in a threaded mode, each connecting bolt is sleeved with a supporting column, and the supporting columns are connected with the water retaining protection plate in a threaded mode. The water retaining protection plate is fixed on the upper part of the valve body through a connecting bolt; and a travel switch is welded at the bottom of the water retaining protection plate and is vertically arranged, and a contact part of the travel switch is downwards aligned to the highest point of the floating ball. The device is used for water permeation alarm of the vacuum breaking valve.

Description

Technical Field

[0001] The utility model relates to a float type vacuum breaking valve water seepage alarm device. Background Art

[0002] The float-type vacuum breaker valve located on the top cover of the waterwheel chamber is a device that introduces air from the waterwheel chamber into the runner chamber below when a short vacuum occurs in the runner chamber due to hydraulic factors, causing the valve plate of the float-type vacuum breaker valve to be pulled open, thereby eliminating the influence of the vacuum on the operation of the turbine.

[0003] When a hydropower station is operating and generating electricity, it is usually necessary for inspectors to check the operation of the float-type vacuum breaker valve during the inspection process. The inspectors judge whether the float-type vacuum breaker valve is operating normally by checking the position of the float in the float-type vacuum breaker valve. If the float of the float-type vacuum breaker valve floats on the top and protrudes from the valve body of the float-type vacuum breaker valve, the inspectors judge that the float-type vacuum breaker valve has water seepage. If the inspectors fail to inspect in place or the inspection occurs during non-inspection time, it is very likely that a water flooding accident will occur in the water compartment, which will cause unplanned shutdown of the unit and affect the safe and stable operation of the unit. Moreover, this method of relying on visual observation by inspectors to identify the working condition of the float-type vacuum breaker valve is very inefficient and does not meet the needs of automation and informatization of hydropower stations in the new era. Utility Model Content

[0004] The utility model aims to solve the above-mentioned technical problems and provides a float type vacuum breaking valve water seepage alarm device.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A float type vacuum breaking valve water seepage alarm device comprises a valve body, a valve plate and a float located in the valve body, a water retaining protection plate is arranged on the upper part of the valve body, at least two connecting bolts are respectively threadedly connected on both sides of the water retaining protection plate, each of the connecting bolts is sleeved with a supporting column, and the water retaining protection plate is fixed to the upper part of the valve body by the connecting bolts;

[0007] A travel switch is welded at the bottom of the water retaining protection plate. The travel switch is arranged vertically and its contact part is downwardly aligned with the highest point of the float.

[0008] The described floating ball type vacuum breaking valve water seepage alarm device has six support columns.

[0009] The described floating ball type vacuum breaking valve water seepage alarm device, the described support column is a threaded telescopic support column. Beneficial Effects

[0010] 1. The utility model can solve the problem that when the float type vacuum breaker valve has water leakage, the water flooding accident is likely to occur when the inspection personnel are not in place or it occurs during non-inspection time. The float type vacuum breaker valve water leakage alarm device of the utility model can realize that when the float type vacuum breaker valve has water leakage, the event situation can be fed back to the on-duty personnel in the first time, so as to avoid further expansion of the event and affect the safe and stable operation of the unit.

[0011] 2. The support column of the utility model is a threaded telescopic column, and the height of the six support columns can be adjusted simultaneously to make them consistent, thereby adjusting the height of the water retaining protection plate and adjusting the height of the travel switch to achieve the purpose of adjusting the position of the water seepage alarm point. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: 1. connecting bolts; 2. supporting column; 3. water retaining protection plate; 4. travel switch; 5. float; 6. valve body; 7. valve plate seal; 8. valve plate. DETAILED DESCRIPTION

[0014] Reference Figure 1 A float type vacuum breaking valve water seepage alarm device, comprising a valve body 6, a valve plate 8 and a float 5 located in the valve body, the valve plate is sealed by a valve plate seal 7, a water retaining plate 3 is arranged on the upper part of the valve body, the water retaining plate is a flat plate structure, at least two connecting bolts 1 are respectively threadedly connected on both sides of the water retaining plate, each of the connecting bolts is covered with a support column 2, and the water retaining plate is fixed to the upper part of the valve body by the connecting bolts;

[0015] The water retaining protection plate is connected to the float type vacuum breaking valve body through the support column and the connecting bolt, which plays the role of fixing the support stroke switch. The setting of the support column can ensure the stable fixation of the water retaining protection plate;

[0016] A travel switch 4 is welded at the bottom of the water retaining protection plate, and the travel switch is arranged vertically and its contact part is downwardly aligned with the highest point of the float;

[0017] The support columns are preferably set to six, three on the left and right sides respectively, which can ensure the stability of the water retaining protection plate; the support columns are threaded telescopic support columns, which include an outer sleeve and an inner tube, the outer sleeve has an inner thread, the inner tube has an outer thread that matches the inner thread of the outer sleeve, the outer sleeve is threadedly connected to the inner tube, and the whole is sleeved on the connecting bolt;

[0018] During installation, first clean the water retaining plate 3 and determine the position of the welding stroke switch 4 to ensure that the contact of the stroke switch 4 can face the highest point of the float when the float floats and contacts it. Weld the stroke switch 4 to the water retaining plate 3 to ensure that the stroke switch 4 is vertically downward and stable, that is, it will not shake or even crack in the weld during normal operation, causing the stroke switch 4 to fall off; dock the transmission cable of the stroke switch 4; after docking, pass the 6 connecting bolts 1 through the water retaining plate, determine the distance between the contact of the stroke switch and the highest point of the float, adjust the height of the six support columns according to the required water seepage alarm point height, adjust the height of the six support columns to the same, and then put the 6 support columns 2 on the 6 connecting bolts 1 respectively, align the 6 connecting bolts 1 with the bolt holes on the valve body 6 of the float vacuum breaker valve, tighten the 6 connecting bolts 1 symmetrically in sequence, and put it into use.

[0019] When the seal of the float-type vacuum breaker valve body fails and a large amount of water enters the float-type vacuum breaker valve body, the float of the float-type vacuum breaker valve will float up, and eventually the float will contact the travel switch. The mechanical movement of the float when it floats up will contact the contacts and then convert into the connection and disconnection of the circuit to transmit the water seepage alarm signal of the float-type vacuum breaker valve; the water retaining protection plate is connected to the float-type vacuum breaker valve body through the supporting column and connecting bolts, which plays the role of fixing and supporting the travel switch.

Claims

1. A float type vacuum breaking valve water seepage alarm device, comprising a valve body, a valve plate and a float located in the valve body, characterized in that: A water retaining protection plate is arranged on the upper part of the valve body, and at least two connecting bolts are respectively threadedly connected on both sides of the water retaining protection plate, and each of the connecting bolts is sleeved with a supporting column, and the water retaining protection plate is fixed to the upper part of the valve body through the connecting bolts; A travel switch is welded at the bottom of the water retaining protection plate. The travel switch is arranged vertically and its contact part is downwardly aligned with the highest point of the float.

2. A floating ball type vacuum breaking valve water seepage alarm device according to claim 1, characterized in that: There are six supporting columns.

3. A floating ball type vacuum breaking valve water seepage alarm device according to claim 1 or 2, characterized in that: The support column is a threaded telescopic support column.

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