CN219889344U - Self-adaptive flow top cover drainage system - Google Patents

Abstract

The utility model provides a self-adaptive flow top cover drainage system which comprises a drainage pipeline, wherein one end of the drainage pipeline is provided with a main drainage port, the other end of the drainage pipeline is provided with a first branch and a second branch, the first branch and the second branch are respectively provided with a first branch water inlet and a second branch water inlet, the height of the main drainage port is lower than that of the first branch water inlet and the second branch water inlet, the first branch is provided with a drainage pump, the second branch is provided with a flow regulating device, the flow regulating device is provided with a valve core body and a floating ball, the height of the floating ball is changed to drive the valve core body to move and change the flow, and the problem that the existing top cover pump is frequently started is solved.

Description

Self-adaptive flow top cover drainage system

Technical Field

The utility model relates to the field of water turbine generator set top cover drainage, in particular to a self-adaptive flow top cover drainage system.

Background

In the hydroelectric generating set, the main shaft seal in the top cover always leaks water, and the mixed flow type set without the cylinder valve adopts self-flow drainage. In the mixed flow type unit and the axial flow type unit with the cylinder valve, the self-flowing drainage cannot be formed due to the blocking of the periphery of the top cover.

The existing submerged pump is often adopted for draining, namely, accumulated water in the top cover is regularly pumped, and the water level is kept in a lower state, but due to the fact that the flow rate of the water pump is large, the accumulated water can drain quickly when the water pump is started, for example, the water leakage rate of the top cover of a certain unit is about 4-5m < 3 >/h, the safety volume in the top cover is 5m < 3 >, a high-capacity top cover pump with the water drainage rate of 45m < 3 >/h is arranged for preventing water flooding, and the top cover pump needs to be started for draining for about 7min every 1 hour. Drainage with drain pumps has been used to consume a large amount of energy, and in this case the drain pump is intermittently operated. The water pump is started and stopped frequently in the instant state, so that the damage to the water pump is larger, the heat productivity and the heat dissipation capacity do not form a steady state within a few minutes after the water pump is started, the expansion and contraction of each part are inconsistent, the water pump is in a cold running-in state, and each part does not operate in an optimal working condition area. In order to ensure reliability, more than 3 top cover pumps are often adopted to start in turn, so the defect of the top cover drainage pump becomes one of the stubborn diseases which plague the hydroelectric generating set.

Disclosure of Invention

The utility model provides a self-adaptive flow top cover drainage system, which solves the problem of frequent starting of the conventional top cover drainage pump.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a self-adaptation flow top cap drainage system, including the drainage pipe, drainage pipe one end is equipped with total outlet, the drainage pipe other end is equipped with first branch road and second branch road, first branch road and second branch road respectively are equipped with first branch road water inlet and second branch road water inlet, total outlet height is less than the height of first branch road water inlet and second branch road water inlet, be equipped with the drain pump on the first branch road, be equipped with flow regulator on the second branch road, flow regulator is equipped with case body and floater, floater altitude change is in order to drive case body removal and change flow size.

In the preferred scheme, the flow regulating device comprises a barrel, a water outlet and a water inlet which are oppositely arranged are formed in the side wall of the barrel, a slidable floating valve core is arranged in the barrel, a first gear and a second gear which are meshed with each other are further arranged on the barrel, a rotating rod and a deflector rod are further arranged, two ends of the rotating rod are respectively connected with a floating ball and the first gear, one end of the deflector rod is used for poking the floating valve core, the other end of the deflector rod is connected with the second gear, and the height of the floating ball is changed so that the area of the floating valve core for shielding the water outlet is changed.

In the preferable scheme, a threaded sleeve is arranged on the floating valve core, and the rotating rod is in threaded connection with the floating ball.

In the preferred scheme, a one-way valve is arranged on the first branch, and a check valve is arranged on the second branch.

The utility model provides a self-adaptation flow top cap drainage system, includes the drain pipe, and drain pipe one end is equipped with total outlet, and the drain pipe other end is equipped with total water inlet, and total outlet height is less than total water inlet, is equipped with drain pump and flow regulator between total outlet and the total water inlet on the drain pipe, and flow regulator is equipped with the floater, and the floater changes in order to adjust flow regulator's flow channel sectional area.

The beneficial effects of the utility model are as follows: the submerged pump in the top cover has two functions of forced drainage and siphon drainage, the siphon drainage has a positive feedback regulation mechanism, the water discharge is large when the water leakage amount of the main shaft seal in the top cover is large, the water discharge amount of the main shaft seal is small when the water leakage amount of the main shaft seal is small, the water level in the top cover of the unit is ensured to be in a proper range all the time, the drainage pump in the top cover is only used as emergency starting, frequent starting is not needed, and the energy consumption is greatly reduced; the flow regulating device adopts a positive feedback regulating mechanism, the opening of the flow regulating device changes along with the water level, and the water level changes along with the water leakage of the top cover, so that a certain relationship exists between the water leakage of the top cover and the water level of the top cover, and the water leakage of the top cover can be monitored by monitoring the water level of the top cover; the practicality is high, has very high popularization and reference significance in the same type of power stations, in particular to hydroelectric generating sets and axial flow type sets with barrel valves, and has wide popularization value in the hydroelectric industry and even across industries.

Drawings

The utility model is further described below with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the serial structure of the present utility model.

Fig. 2 is a schematic diagram of a parallel structure of the present utility model.

Fig. 3 is a schematic view of a flow regulating device of the present utility model.

Fig. 4 is a state diagram of the flow rate adjusting device of the present utility model.

Fig. 5 is a second state diagram of the flow regulator of the present utility model.

Fig. 6 is a state diagram three of the flow rate adjustment device of the present utility model.

In the figure: a flow rate adjusting device 1; a floating spool 101; a screw sleeve 102; a float ball 103; a rotating lever 104; a first gear 105; a second gear 106; a lever 107; a drain port 108; a water inlet 109; a drain pump 2; a one-way valve 3; a first manual shut-off valve 4; a check valve 5; a second manual shut-off valve 6.

Detailed Description

Example 1:

as shown in fig. 1-6, a self-adaptive flow top cover drainage system comprises a drainage pipeline, wherein one end of the drainage pipeline is provided with a total drainage outlet, the other end of the drainage pipeline is provided with a first branch and a second branch, the first branch and the second branch are respectively provided with a first branch water inlet and a second branch water inlet, the total drainage outlet is lower than the heights of the first branch water inlet and the second branch water inlet, the first branch is provided with a drainage pump 2, the second branch is provided with a flow regulating device 1, the flow regulating device 1 is provided with a valve core body and a floating ball 103, and the height of the floating ball 103 is changed to drive the valve core body to move and change the flow.

The first branch and the second branch adopt a parallel connection mode, the drainage pump 2 firstly works to drain the air in the first branch completely and start drainage, the air in the second branch is also pumped out due to the fact that the flow speed is accelerated and the pressure intensity is reduced, and the water starts to enter from the second branch and flows to the total drainage outlet, and at the moment, the drainage pump 2 is closed and drainage is only performed by siphoning.

In the preferred scheme, the flow regulating device 1 comprises a barrel, a water outlet 108 and a water inlet 109 which are oppositely arranged are arranged on the side wall of the barrel, a slidable floating valve core 101 is arranged in the barrel, a first gear 105 and a second gear 106 which are meshed with each other are further arranged on the barrel, a rotating rod 104 and a deflector rod 107 are further arranged on the barrel, two ends of the rotating rod 104 are respectively connected with a floating ball 103 and the first gear 105, one end of the deflector rod 107 is used for poking the floating valve core 101, the other end of the deflector rod 107 is connected with the second gear 106, and the height of the floating ball 103 is changed so that the area of the floating valve core 101 for shielding the water outlet 108 is changed.

The second gear 106 is connected with the deflector rod 107 integrally, the rotation center of the deflector rod 107 is the center of the second gear 106, the rotation center of the rotating rod 104 is the center of the first gear 105, when the floating ball 103 sinks, the deflector rod 107 downwards dials the floating valve core 101 to enable the floating valve core 101 to move downwards, the water outlet 108 is arranged at the position, close to the bottom end, of the cylinder body, the water outlet 108 is gradually shielded by the downwards movement of the floating valve core 101, the cross section area of a channel between the water inlet 109 and the water outlet 108 is reduced, the flow is gradually reduced, and the water drainage is delayed.

The traditional ball float valve adopts lever, and the case moves up when the floater moves down, when floater 103 falls to the bottom, still has the water of certain height in the top cap, has two kinds of choices to traditional ball float valve, and more common case is that the case separates drainage channel completely, no longer drains, and another one is that keeps certain drainage channel, but because floater 103 reaches the position limit, no longer plays the effect of adjusting the aperture, consequently remaining water can be by the quick drainage, and the siphon effect can be interrupted to above two kinds of cases.

In this case, the floating valve core 101 receives insufficient buoyancy, the floating valve core 101 descends, the cross-sectional area of the channel between the water inlet 109 and the water outlet 108 is further reduced, the flow is reduced, the excessive flow is prevented, the residual water is rapidly discharged, and the siphon is interrupted. When the siphon discharge amount is smaller than the leakage amount, the top cover is gradually replenished, the floating valve core 101 is lifted, the passage sectional area between the water inlet 109 and the water outlet 108 is increased, and the flow rate is increased, so that the siphon discharge is dynamically maintained for a long time, and the drain pump 2 does not need to be frequently started.

In the preferred scheme, a threaded sleeve 102 is arranged on a floating valve core 101, and a rotating rod 104 is in threaded connection with a floating ball 103.

The initial height of the floating valve core 101 and the height of the lowest end of the floating ball 103 can be conveniently adjusted.

In a preferred embodiment, the first branch is provided with a one-way valve 3 and the second branch is provided with a non-return valve 5.

Preventing water from one of the branches from flowing back to the other branch. The first branch is also provided with a first manual stop valve 4, and the second branch is also provided with a second manual stop valve 6.

The utility model provides a self-adaptation flow top cap drainage system, includes the drain pipe, and drain pipe one end is equipped with total outlet, and the drain pipe other end is equipped with total water inlet, and total outlet height is less than total water inlet, is equipped with drain pump 2 and flow regulator 1 between total outlet and the total water inlet on the drain pipe, and flow regulator 1 is equipped with floater 103, and floater 103 highly changes in order to adjust flow channel sectional area of flow regulator 1.

The method is a serial connection method, and a one-way valve 3 and a first manual stop valve 4 are also arranged on the drain pipe.

Example 2:

the drainage system comprises two mechanisms of forced drainage and siphon drainage, and comprises a positive feedback flow regulating device, a drainage pipeline, a drainage pump, a valve and the like. The water inlet and the water outlet of the drain pipe are required to be kept below the liquid level, the positive feedback flow regulator can be changed along with the change of the water leakage amount in the top cover, the positive feedback flow regulator plays a role of opening/closing the water inlet or regulating the flow, the water flow for draining is forced to flush out of air in the pipeline when the drain pump is started for the first time, a siphon effect is formed, the siphon drainage is continued all the time when the drain pump is normally operated in the later period, and most of the drain pump does not operate, and energy is not consumed. When the water inflow of the system is too large or the siphon water drainage of the air entering the pipeline can not meet the water drainage requirement, the liquid level reaches the water level of the starting pump, the drainage pump is forced to drain water, and accumulated water is rapidly discharged. Thereby realizing the automatic switching between forced drainage and siphon drainage.

The positive feedback flow regulator can automatically regulate flow, and the principle is as follows:

when the water leakage amount in the top cover is increased, the liquid level in the top cover can rise, the liquid level rising belt can lift the floating ball to rise, and the floating ball drives the rotary valve disc to rotate through the ball rod, so that the opening is enlarged, and the water drainage amount is increased.

When the water leakage amount in the top cover is reduced, the liquid level is reduced to drive the floating ball to descend, and the floating ball drives the rotary valve disc to rotate through the ball float rod, so that the opening is reduced, and the water drainage amount is reduced.

When all the above water drainage is performed, the water outlet needs to ensure that air cannot enter.

Positive feedback flow regulator:

the part comprises a shell, a static valve disc, a rotary valve disc, a ball float, a floating ball, a bolt, a flange and the like.

The shell is of a cylindrical structure, and a static valve disc mounting hole, a ball rod rotating hole and a filter screen are machined on the shell; the rotary valve disc and the stationary valve disc are basically identical in structure, and are of multi-sector-hole disc structures, and the flange is used for fixing the valve housing on the pipeline, so that the valve housing can rotate on the flange. The stationary valve disc and the rotary valve disc can rotate relative to each other and are fixed in the housing by bolts, and the basic structure is shown in the figure.

The static valve disc and the rotary valve disc are processed by stainless steel and are connected together through a valve shaft and can mutually rotate. A plurality of sector holes are formed in the two parts, and when the two parts rotate mutually, the excessive reduction of the overflow area can be increased, so that the flow rate can be regulated.

The stationary valve disc and the housing are connected by three radial bolts so as to be integral with the housing, and the change in the flow area is changed only by rotation of the rotating valve disc.

The shell is tightly pressed on the flange on the pipeline through the flange, and because the static valve disc and the shell are connected into a whole, when the flange bolt is not fastened, the shell can rotate, thereby adjusting the initial position of the static valve disc.

The floating ball is a hollow stainless steel ball, and can be transformed along with the fluctuation of the water level. The floating ball drives the rotary valve disc to rotate around the shaft through the ball float rod, so that the effect of adjusting the overflow area is achieved.

Realize forcing drainage and siphon drainage automatic switch over through check valve etc. and form continuous drainage effect, have following advantage:

1. the energy is saved, the drainage pump is only used as starting energy, and the energy is not consumed in the subsequent drainage process, so that the energy consumption is greatly reduced;

2. the positive feedback flow regulating device can regulate the flow according to the water level;

3. the scheme can realize automatic switching of forced drainage and siphon drainage, the forced drainage can realize high-flow drainage under emergency conditions, and the water pump is used as an emergency pump;

4. the installation is convenient, the change amount of the existing pipeline is small, and the transformation can be completed by only adding a positive feedback flow regulating device and a water outlet tank to most submersible pumps;

5. the sealing position is not required to be tightly sealed, and only the water leakage speed after sealing is required to be not more than the water accumulation speed;

6. the positive feedback flow regulator can regulate initial position and thus stable running water level, so that it has wide application range.

7. The pipeline is less in transformation;

8. this patent practicality is high, has very high popularization and reference meaning at the power station of same type, possesses and extensively promotes value in the water and electricity trade even stride the trade.

The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.

Claims (5)

1. An adaptive flow cap drainage system, characterized by: including drainage pipe, drainage pipe one end is equipped with total outlet, and the drainage pipe other end is equipped with first branch road and second branch road, and first branch road and second branch road respectively are equipped with first branch road water inlet and second branch road water inlet, and total outlet highly is less than the height of first branch road water inlet and second branch road water inlet, is equipped with drain pump (2) on the first branch road, is equipped with flow regulator (1) on the second branch road, and flow regulator (1) are equipped with case body and floater (103), and floater (103) highly change in order to drive case body and remove and change flow size.

2. The adaptive flow cap drainage system of claim 1, wherein: the flow regulating device (1) comprises a barrel, a water outlet (108) and a water inlet (109) which are oppositely arranged are formed in the side wall of the barrel, a slidable floating valve core (101) is arranged in the barrel, a first gear (105) and a second gear (106) which are meshed with each other are further arranged on the barrel, a rotating rod (104) and a deflector rod (107) are further arranged, two ends of the rotating rod (104) are respectively connected with a floating ball (103) and the first gear (105), one end of the deflector rod (107) is used for stirring the floating valve core (101), the other end of the deflector rod (107) is connected with the second gear (106), and the height of the floating ball (103) is changed so that the area of the floating valve core (101) for shielding the water outlet (108) is changed.

3. The adaptive flow cap drainage system of claim 2, wherein: the floating valve core (101) is provided with a threaded sleeve (102), and the rotating rod (104) is in threaded connection with the floating ball (103).

4. The adaptive flow cap drainage system of claim 1, wherein: the first branch is provided with a one-way valve (3), and the second branch is provided with a check valve (5).

5. An adaptive flow cap drainage system, characterized by: including drainage pipe, drainage pipe one end is equipped with total outlet, and the drainage pipe other end is equipped with total water inlet, and total outlet height is less than total water inlet, is equipped with drain pump (2) and flow control device (1) between drainage pipe total outlet and the total water inlet, and flow control device (1) are equipped with floater (103), and floater (103) highly change in order to adjust the flow channel sectional area of flow control device (1).