CN215719193U - Gulp valve for hydraulic turbine - Google Patents

Abstract

The utility model discloses an aeration valve for a water turbine, and relates to the technical field of aeration valves. This gulp valve for hydraulic turbine includes the disk seat, the top outer wall of disk seat is provided with the valve body, the top outer wall fixedly connected with gulp chamber lid of valve body, the outer wall of valve body and the inner wall that is located the gulp chamber lid are provided with the secondary and prevent returning the water seal cover, the inner wall of valve body is provided with the valve rod, the gulp port has all been seted up with the secondary to the gulp chamber lid with the top outer wall that the secondary prevents returning the water seal cover, the secondary prevents returning the sealed ball net of inner wall fixedly connected with of water seal cover, the inner wall of sealed ball net is provided with sealed floater. The water leakage can be sealed in the ball float valve through the ball float valve, the secondary sealing effect is achieved, accidents caused by water leakage of a valve disc of the buffer type air compensating valve are prevented, and the air compensating valve with the secondary water return sealing cover is mainly used for rapidly establishing sealing pressure to achieve the sealing effect when the water quantity of a water inlet end is larger than that of a water outlet end by the ball float valve.

Description

Gulp valve for hydraulic turbine

Technical Field

The utility model relates to the technical field of air compensating valves, in particular to an air compensating valve for a water turbine.

Background

The mixed-flow type water turbine generator set is used in most of the hydroelectric power generation equipment, and the rotating wheel is a core component of the water turbine generator set. When the runner is operated, started and stopped and the load is dynamically changed under the condition of deviating from the optimal working condition, negative pressure is formed, cavitation damage is generated, and the efficiency and the stability of the water turbine are influenced. At this time, the turbine air-compensating valve is needed to supplement air to the runner to eliminate the above-mentioned influence.

The water stop of the existing main shaft center hole air supplement device is a single float valve type water stop structure, a manual butterfly valve is installed in the center body of a generator rotor and serves as an isolation valve, the valve is a common valve and can only be used in a static state generally, strong centrifugal force can be generated when a unit rotates in the operation process of the unit, the phenomenon that parts of a worm and gear operating mechanism outside the butterfly valve are thrown out when the rotating part of the unit is checked and the unit is overhauled is found, although the valve is timely installed and restored every time, if the large shaft air supplement valve fails and leaks water, the isolation valve needs to be closed urgently for overhaul, so that parts of a transmission mechanism of the isolation valve are thrown out, the operation cannot be carried out, the valve is closed timely to cut off the incoming water, serious potential safety hazards exist, and even plant accidents caused by water flooding can occur. And the air supplement port of the existing air supplement valve is arranged on the valve cover, silt exists in water, and a silt intercepting and filtering device is not arranged, so that the air supplement port is extremely easy to be blocked by the silt, and normal air supplement can not be carried out on the unit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gulp valve for a water turbine, which has a good sealing effect and is convenient for intercepting and filtering silt.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an aeration valve for hydraulic turbine, includes the disk seat, the top outer wall of disk seat is provided with the valve body, the top outer wall fixedly connected with aeration chamber lid of valve body, the outer wall of valve body and the inner wall that is located the aeration chamber lid are provided with the secondary and prevent returning the water sealed cowling, the inner wall of valve body is provided with the valve rod, the aeration port has all been seted up with the secondary to the aeration chamber lid and the top outer wall of secondary and prevent returning the water sealed cowling, the secondary prevents returning the sealed ball net of inner wall fixedly connected with of water sealed cowling, the inner wall of sealed ball net is provided with sealed floater, the top outer wall fixedly connected with sand filtering device of aeration chamber lid.

The sand filtering device comprises a filtering shell, the top of the inner wall of the filtering shell is rotatably connected with a rotating shaft, the outer wall of the rotating shaft is rotatably connected with an auxiliary rotating device, the outer wall of the rotating shaft is fixedly connected with a rotating rod, and the rotating rod is far away from a cleaning brush fixedly connected with one end of the rotating shaft.

Preferably, the outer wall of the valve rod is sleeved with a spring, a locking nut and a pressing plate are arranged on the outer wall of the valve rod and above the spring, and the pressing plate is pressed to the spring through the locking nut.

Preferably, the air supply ports are matched with the size of the sealing floating ball, and the air supply ports are distributed on the air supply chamber cover body and the outer wall of the top of the secondary water return prevention sealing cover in an array mode.

Preferably, the inner wall of the air supplementing opening is provided with a rubber sealing piece.

Preferably, the outer wall of the filter shell is provided with filter holes.

Preferably, the rotating rods are arranged below the auxiliary rotating device and are distributed in an array mode by taking the circle center of the rotating shaft as the center.

Compared with the prior art, the aeration valve for the water turbine provided by the utility model has the following beneficial effects:

the utility model provides an aeration valve for a water turbine, which can seal water leakage in a floating ball valve through the floating ball valve to play a role of secondary sealing and prevent accidents caused by water leakage of a valve disc of a buffer type aeration valve.

The utility model provides an air compensating valve for a water turbine, which blocks silt in water through a sand filtering device, and drives a cleaning brush to rotate through an auxiliary rotating device, so that the cleaning brush cleans the silt in a filtering hole, the filtering hole is prevented from being blocked, air compensation is influenced, a gas compensating port is conveniently blocked, and the reliability of the air compensating valve is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a cutaway structure of the present invention;

FIG. 3 is a schematic view of the sand filter apparatus of the present invention;

fig. 4 is a sectional structure diagram of the sand filtering device of the utility model.

In the figure: 1. a valve seat; 2. a valve body; 3. a cover body of the air supply chamber; 4. a secondary water return prevention sealing cover; 5. a valve stem; 6. a spring; 7. an air supplement port; 8. sealing the floating net; 9. sealing the floating ball; 10. a sand filtration device; 101. a filter shell; 102. filtering holes; 103. a rotating shaft; 104. an auxiliary rotating device; 105. rotating the rod; 106. a cleaning brush.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-2, the present invention provides a technical solution: an air compensating valve for a water turbine comprises a valve seat 1, wherein a valve body 2 is arranged on the outer wall of the top of the valve seat 1, an air compensating chamber cover body 3 is fixedly connected to the outer wall of the top of the valve body 2, a secondary water return preventing sealing cover 4 is arranged on the outer wall of the valve body 2 and positioned on the inner wall of the air compensating chamber cover body 3, a valve rod 5 is arranged on the inner wall of the valve body 2, a spring 6 is sleeved on the outer wall of the valve rod 5, a locking nut and a pressing plate are arranged on the outer wall of the valve rod 5 and positioned above the spring 6, the pressing plate is pressed towards the spring 6 through the locking nut, air compensating ports 7 are formed in the outer walls of the tops of the air compensating chamber cover body 3 and the secondary water return preventing sealing cover 4, rubber sealing elements are arranged on the inner wall of the air compensating ports 7 in an array mode, all the rubber sealing elements are sealed by inlet oil-resistant rubber, the sealing pressure is larger than 1.6MPa, a sealing floating net 8 is fixedly connected to the inner wall of the secondary water return preventing sealing cover 4, the inner wall of the sealed floating net 8 is provided with a sealed floating ball 9, the sealed floating ball 9 needs to be made of stainless steel and has certain water hammer resistance, the air supply port 7 is matched with the sealed floating ball 9 in size, and the top outer wall of the air supply chamber cover 3 is fixedly connected with a sand filtering device 10.

In the embodiment, in the normal working state, the sealing floating ball 9 is in the full-open position, the air supply valve is used for supplying air normally under the working condition of the unit, when the valve disc of the air compensating valve is damaged in a sealing way or is not closed tightly, and water leaks, the sealing floating ball 9 can seal the water leakage in the sealing floating ball 9 to play a role of secondary sealing, so that accidents caused by the water leakage of the valve disc of the buffer type air compensating valve are prevented, according to the space of the air supply chamber and the amount of machine lifting, after the secondary water return prevention sealing cover 4 is added, the air supply valve with the secondary water return prevention sealing cover 4 is mainly used for rapidly establishing sealing pressure by the sealing floating ball 9 when the water amount of the water inlet end is larger than that of the water outlet end to achieve a sealing effect, the secondary water return prevention sealing cover 4 is sealed by the sealing floating ball 9, the sealing floating ball 9 is small and easy to process, strong in water hammer resistance, good in spherical curvature, small in sealing port diameter and good in sealing performance, and the sealing floating balls 9 are all adopted.

Example two:

referring to fig. 3-4, based on the first embodiment, the present invention provides a technical solution: filter sand device 10 is including filtering shell 101, the filtration pore 102 has been seted up to the outer wall of filtering shell 101, the inner wall top of filtering shell 101 is rotated and is connected with pivot 103, the outer wall of pivot 103 is rotated and is connected with supplementary rotary device 104, the outer wall fixedly connected with dwang 105 of pivot 103, dwang 105 sets up in the below of supplementary rotary device 104, dwang 105 uses the centre of a circle of pivot 103 to distribute as central array, the one end fixedly connected with cleaning brush 106 of pivot 103 is kept away from to dwang 105.

In this embodiment, block the silt of aquatic through filtering shell 101, when supplementary rotary device 104 received the effect of external force, drive pivot 103 and rotate thereupon, pivot 103 drives dwang 105 and rotates, and then drives cleaning brush 106 and rotate, makes cleaning brush 106 clean the silt of filtering in the hole 102, avoids filtering hole 102 to block up, influences the tonifying qi, and the convenience keeps off the husky to tonifying qi mouth 7.

The working principle is as follows: in a normal working state, the sealing floating ball 9 is in a full-open position, the air supply valve is used for supplying air normally under the working condition of the unit, when the valve disc of the air compensating valve is damaged in a sealing way or is not closed tightly, and water leaks, the sealing floating ball 9 can seal the water leakage in the sealing floating ball 9 to play a role of secondary sealing, so that accidents caused by the water leakage of the valve disc of the buffer type air compensating valve are prevented, according to the space of the air supply chamber and the machine lifting amount, after the secondary water return prevention sealing cover 4 is added, the air supply valve with the secondary water return prevention sealing cover 4 is mainly used for rapidly establishing sealing pressure by the sealing floating ball 9 when the water amount at the water inlet end is larger than that at the water outlet end to achieve a sealing effect, the secondary water return prevention sealing cover 4 is sealed by the sealing floating ball 9, the sealing floating ball 9 is small and easy to process, strong in water hammer resistance, good in spherical curvature, small in sealing port diameter and good in sealing performance, and the sealing floating balls 9 are all adopted; block the silt of aquatic through filtering shell 101, when supplementary rotary device 104 received the effect of external force, drive pivot 103 and rotate thereupon, pivot 103 drives dwang 105 and rotates, and then drives cleaning brush 106 and rotate, makes cleaning brush 106 clean the silt of filtering in the hole 102, avoids filtering hole 102 to block up, influences the tonifying qi, conveniently keeps off the husky to tonifying qi mouth 7.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an gulp valve for hydraulic turbine, includes disk seat (1), its characterized in that: the valve body (2) is arranged on the outer wall of the top of the valve seat (1), the air supplementing chamber cover body (3) is fixedly connected to the outer wall of the top of the valve body (2), a secondary water return preventing sealing cover (4) is arranged on the outer wall of the valve body (2) and on the inner wall of the air supplementing chamber cover body (3), a valve rod (5) is arranged on the inner wall of the valve body (2), air supplementing ports (7) are formed in the outer walls of the tops of the air supplementing chamber cover body (3) and the secondary water return preventing sealing cover (4), a sealing floating ball net (8) is fixedly connected to the inner wall of the secondary water return preventing sealing cover (4), a sealing floating ball (9) is arranged on the inner wall of the sealing floating ball net (8), and a sand filtering device (10) is fixedly connected to the outer wall of the top of the air supplementing chamber cover body (3);

filter husky device (10) including filtering shell (101), the inner wall top of filtering shell (101) is rotated and is connected with pivot (103), the outer wall of pivot (103) is rotated and is connected with supplementary rotary device (104), the outer wall fixedly connected with dwang (105) of pivot (103), the one end fixedly connected with cleaning brush (106) of pivot (103) are kept away from in dwang (105).

2. The gulp valve for the hydraulic turbine of claim 1, wherein: spring (6) has been cup jointed to the outer wall of valve rod (5), the outer wall of valve rod (5) and the top that is located spring (6) are provided with lock nut and clamp plate, press the clamp plate to spring (6) through lock nut.

3. The gulp valve for the hydraulic turbine of claim 1, wherein: the air supplementing ports (7) are matched with the sealing floating balls (9) in size, and the air supplementing ports (7) are distributed on the outer walls of the tops of the air supplementing chamber cover body (3) and the secondary water return preventing sealing cover (4) in an array mode.

4. The gulp valve for the hydraulic turbine of claim 1, wherein: and a rubber sealing element is arranged on the inner wall of the air supplementing port (7).

5. The gulp valve for the hydraulic turbine of claim 1, wherein: the outer wall of the filter shell (101) is provided with filter holes (102).

6. The gulp valve for the hydraulic turbine of claim 1, wherein: the rotating rod (105) is arranged below the auxiliary rotating device (104), and the rotating rod (105) is distributed in an array mode by taking the circle center of the rotating shaft (103) as the center.

Images