Water turbine speed regulator

Abstract

The utility model relates to the field of water turbine control, and discloses a water turbine governor which comprises a water turbine body (1), a pipeline (2) and a control mechanism. The water turbine main body (1) comprises a water wheel which is driven by a motor; the pipeline (2) is a water flow channel, and flowing water flow generated by the water turbine main body (1) flows in the pipeline (2); the control mechanism comprises a control assembly and a valve head (3), a valve port (4) is formed in the pipeline (2), the valve head (3) controls the opening and closing degree of the valve port (4), and the control assembly controls the action of the valve head (3). The device has the advantages of simple and reliable control, accurate control and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water turbine speed regulation, especially to a water turbine speed regulator. BACKGROUND

[0002] A pneumatic motor is generally used as a driving source of a pneumatic tool such as a pneumatic sander or a pneumatic grinder. The pneumatic tool generally has a speed regulator that adjusts the rotational speed of the pneumatic motor. For example, Patent Document 1 describes a pneumatic tool having a pneumatic motor and a speed regulator. In the pneumatic tool described in Patent Document 1, if the rotational speed of the pneumatic motor reaches a certain speed or more, the speed regulator reduces the supply flow rate of compressed air supplied to the pneumatic motor to prevent the rotational speed of the pneumatic motor from exceeding an allowable speed determined in consideration of safety. That is, in the pneumatic tool described in Patent Document 1, the speed regulator operates to limit the maximum speed of the pneumatic motor. Chinese patent CN201780094804.4 discloses a speed regulator for a pneumatic motor and a pneumatic tool. The scheme only designs the structure of the speed regulator and does not describe the control part. The present scheme provides a pneumatic speed regulator with simple structure and simple and reliable control. SUMMARY

[0003] The utility model discloses a water turbine speed regulator for the shortcoming in the prior art.

[0004] To solve the above technical problems, the utility model discloses the following technical scheme:

[0005] A water turbine speed regulator, comprising a water turbine main body, a pipeline and a control mechanism.

[0006] The water turbine main body comprises a water wheel, which is driven by a motor.

[0007] The pipeline is a water flow passage, and the flowing water generated by the water turbine main body flows in the pipeline.

[0008] The control mechanism comprises a control assembly and a valve head, the pipeline is provided with a valve port, the valve head controls the opening and closing size of the valve port, and the control assembly controls the action of the valve head.

[0009] As a preferred, the control assembly comprises a cylinder for driving the valve head to move, and further comprises an electromagnetic valve one, an electromagnetic valve two and an electromagnetic valve three for controlling the action of the cylinder, the electromagnetic valve one is a three-position five-way valve, the electromagnetic valve two is a two-position two-way valve, and the electromagnetic valve three is a two-position two-way valve; the electromagnetic valve two and the electromagnetic valve three are normally closed valves, the cylinder is provided with a piston cavity and a piston, the piston cavity is divided into a left cavity and a right cavity by the piston, the electromagnetic valve two is connected to the left cavity, and the electromagnetic valve three is connected to the right cavity; the electromagnetic valve two and the electromagnetic valve three are normally closed valves; the electromagnetic valve one is connected to the electromagnetic valve one, the electromagnetic valve two and the electromagnetic valve three.

[0010] Opening action, electromagnetic valve one is connected to electromagnetic valve two, electromagnetic valve two and electromagnetic valve three are powered on, left cavity intake, right cavity exhaust, piston right shift;

[0011] Closing action, electromagnetic valve one is connected to electromagnetic valve two, electromagnetic valve two and electromagnetic valve three are powered on, right cavity intake, left cavity exhaust, piston left shift;

[0012] Stop state, electromagnetic valve two and electromagnetic valve three are powered off, left cavity and right cavity are not intake and exhaust.

[0013] As preferred, three-position five-way electromagnetic valve includes intake port P, exhaust port A, exhaust port B and exhaust port R and exhaust port S;Electromagnetic valve two includes P1 port and A1 port, electromagnetic valve three includes P2 port and B1 port, A port and P1 port are connected, B port and P2 port are connected, A1 port and left cavity are communicated, B1 port and right cavity are communicated;P port can be communicated with one of A port and B port under the control of electromagnetic valve, the other gas port is communicated with exhaust port R or exhaust port S.

[0014] As preferred, electromagnetic valve one controls A port to be communicated with exhaust port R or intake port P, electromagnetic valve one controls B port to be communicated with exhaust port S or intake port P.

[0015] As preferred, it further includes pressure reducing valve, pressure reducing valve is communicated with electromagnetic valve one and controls the gas pressure entering electromagnetic valve one.

[0016] As preferred, guide bracket is arranged in pipeline, cylinder includes piston rod, piston rod supports through guide bracket, and end of piston rod is connected with valve head.

[0017] As preferred, valve head is conical structure.

[0018] The utility model discloses a valve head, which is connected with a piston rod, and the piston rod is supported through a guide bracket.

[0019] Compared with the prior art, the utility model has the following obvious advantages and positive effects: the whole control scheme is simple and reliable, can be adjusted and improved according to needs, and the execution structure is stable and reliable, and the reciprocating motion has a long service life. DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the opening state of device.

[0021] Figure 2 It is the structure schematic diagram of the closing state of device.

[0022] Figure 3 It is pneumatic principle diagram.

[0023] The technical names of the reference numerals in the figure are: 1 - water turbine main body, 2 - pipeline, 3 - valve head, 4 - valve port, 5 - cylinder, 6 - electromagnetic valve one, 7 - electromagnetic valve two, 8 - electromagnetic valve three, 9 - left cavity, 10 - right cavity, 11 - guide support, 12 - pressure reducing valve. DETAILED DESCRIPTION

[0024] The utility model will be described in further detail below in combination with the drawings and examples.

[0025] Example 1

[0026] A water turbine speed regulator comprises a water turbine main body 1, a pipeline 2 and a control mechanism.

[0027] The water turbine main body 1 comprises a water wheel, which is driven by a motor; the water wheel transports water under the driving of the motor.

[0028] The pipeline 2 is a water flow channel, and the water flow generated by the water turbine main body 1 flows in the pipeline 2; the control mechanism is mainly used for controlling the flow rate of the water flow in the pipeline 2.

[0029] The control mechanism comprises a control assembly and a valve head 3, the pipeline 2 is provided with a valve port 4, the valve head 3 controls the opening and closing size of the valve port 4, and the control assembly controls the action of the valve head 3; the valve port 4 and the valve head 3 are provided with rubber sealing pads or sealing rings at the contact positions, so as to ensure the reliability of the sealing of the two.

[0030] The control assembly comprises a cylinder 5 for driving the valve head 3 to move, and further comprises an electromagnetic valve one 6, an electromagnetic valve two 7 and an electromagnetic valve three 8 for controlling the action of the cylinder 5; the electromagnetic valve one 6 is a three-position five-way valve, the electromagnetic valve two 7 is a two-position two-way valve, and the electromagnetic valve three 8 is a two-position two-way valve; the electromagnetic valve two 7 and the electromagnetic valve three 8 are normally closed valves, and the cylinder 5 is provided with a piston cavity and a piston; the piston cavity is divided into a left cavity 9 and a right cavity 10 by the piston; the electromagnetic valve two 7 is connected to the left cavity 9, and the electromagnetic valve three 8 is connected to the right cavity 10; the electromagnetic valve two 7 and the electromagnetic valve three 8 are normally closed valves; the electromagnetic valve one 6 is connected to the electromagnetic valve one 6, the electromagnetic valve two 7 and the electromagnetic valve three 8.

[0031] Opening action: the electromagnetic valve one 6 is electrically connected to the electromagnetic valve two 7, the electromagnetic valve two 7 and the electromagnetic valve three 8 are electrified, the left cavity 9 is filled with air, the right cavity 10 is discharged, and the piston moves to the right;

[0032] Closing action: the electromagnetic valve one 6 is electrically connected to the electromagnetic valve two 7, the electromagnetic valve two 7 and the electromagnetic valve three 8 are electrified, the right cavity 10 is filled with air, the left cavity 9 is discharged, and the piston moves to the left;

[0033] Stop state: the electromagnetic valve two 7 and the electromagnetic valve three 8 are de-energized, and neither the left cavity 9 nor the right cavity 10 is filled with air or discharged.

[0034] The three-position five-way electromagnetic valve includes an air inlet port P, an air outlet port A, an air outlet port B, and an exhaust port R and an exhaust port S; the electromagnetic valve two 7 includes a P1 port and an A1 port, the electromagnetic valve three 8 includes a P2 port and a B1 port, the A port is connected with the P1 port, the B port is connected with the P2 port, the A1 port is communicated with the left cavity 9, and the B1 port is communicated with the right cavity 10; the P port is communicated with one of the A port and the B port under the control of the electromagnetic valve, and the other air port is communicated with the exhaust port R or the exhaust port S. In the embodiment, the initial state of the electromagnetic valve one 6 is that the air inlet port P is communicated with the initial port A, and the air outlet port B is communicated with the exhaust port S; in the power-off state, the A1 port is disconnected with the P1 port, and the B1 port is disconnected with the P2 port.

[0035] In the embodiment, the electromagnetic valve one 6 controls the A port to be communicated with the exhaust port R or the air inlet port P, and the electromagnetic valve one 6 controls the B port to be communicated with the exhaust port S or the air inlet port P.

[0036] In order to ensure that the air pressure entering the whole control system is stable, a pressure reducing valve 12 is further included, which is communicated with the electromagnetic valve one 6 to control the air pressure entering the electromagnetic valve one 6. In the embodiment, the air pressure is controlled at 5.5 Mpa.

[0037] In the embodiment, a guide support 11 is arranged in the pipeline 2, the air cylinder 5 includes a piston rod, the piston rod is supported through the guide support 11, and the end of the piston rod is connected with the valve head 3. The valve head 3 is a conical structure.

[0038] The specific working process is as follows:

[0039] When it is needed to close the valve port 4, the air inlet port P and the air outlet port A of the electromagnetic valve one 6 are communicated, at this time, the air outlet port B and the exhaust port S are communicated, and since the electromagnetic valve two 7 and the electromagnetic valve three 8 are both in the power-on state, the air flow of the exhaust end A enters the left cavity 9 through the P1 port and the A1 port, thereby pushing the piston to move rightwards; then the air in the right cavity 10 is discharged from the exhaust port S through the B1 port, the P2 port, the air outlet port B and finally the exhaust port S.

[0040] When it is needed to open the valve port 4, the air inlet port P of the electromagnetic valve one 6 is controlled to be changed to be communicated with the air outlet port B, at this time, the air outlet port A is communicated with the exhaust port R, and since the electromagnetic valve two 7 and the electromagnetic valve three 8 are both in the power-on state, the air flow of the exhaust end B enters the left cavity 9 through the P2 port and the B1 port, thereby pushing the piston to move leftwards; then the air in the left cavity 9 is discharged from the exhaust port R through the A1 port, the P1 port and finally the air outlet port A.

[0041] When it is needed to keep the valve head 3 at the current position, it is only needed to disconnect the electromagnetic valve two 7 and the electromagnetic valve three 8, and the current state can be realized, in this state, the left cavity 9 and the right cavity 10 are disconnected with the air path outside, thereby the current state can be kept.

[0042] Embodiment 2

[0043] This example discloses a water turbine governor, which differs from example 1 in that the pressure entering the inlet port P is 5.6 MPa.

[0044] Example 3

[0045] This example discloses a water turbine governor, which differs from example 1 in that the pressure entering the inlet port P is 5.8 MPa.

Claims

1. A hydro-turbine governor characterized by: The utility model relates to a water turbine, which comprises a water turbine body (1), a pipeline (2) and a control mechanism. The water turbine body (1) comprises a water wheel driven by a motor. The pipeline (2) is a water flow channel, and the water flow generated by the water turbine body (1) flows in the pipeline (2). The control mechanism comprises a control assembly and a valve head (3), and the pipeline (2) is provided with a valve port (4), the valve head (3) controls the opening and closing size of the valve port (4), and the control assembly controls the action of the valve head (3).

2. A hydro-turbine governor according to claim 1, wherein: The control assembly comprises a cylinder (5) for driving the valve head (3) to move, and further comprises an electromagnetic valve one (6), an electromagnetic valve two (7) and an electromagnetic valve three (8) for controlling the action of the cylinder (5), the electromagnetic valve one (6) is a three-position five-way valve, the electromagnetic valve two (7) is a two-position two-way valve, and the electromagnetic valve three (8) is a two-position two-way valve; the electromagnetic valve two (7) and the electromagnetic valve three (8) are normally closed valves, the cylinder (5) is provided with a piston cavity and a piston, the piston cavity is divided into a left cavity (9) and a right cavity (10) by the piston, the electromagnetic valve two (7) is connected to the left cavity (9), and the electromagnetic valve three (8) is connected to the right cavity (10); the electromagnetic valve two (7) and the electromagnetic valve three (8) are normally closed valves; the electromagnetic valve one (6) is connected to the electromagnetic valve one (6), the electromagnetic valve two (7) and the electromagnetic valve three (8). In the opening action, the electromagnetic valve one (6) is electrically connected to the electromagnetic valve two (7), the electromagnetic valve two (7) and the electromagnetic valve three (8) are electrified, air is introduced into the left cavity (9), air is discharged from the right cavity (10), and the piston moves rightward. In the closing action, the electromagnetic valve one (6) is electrically connected to the electromagnetic valve two (7), the electromagnetic valve two (7) and the electromagnetic valve three (8) are electrified, air is introduced into the right cavity (10), air is discharged from the left cavity (9), and the piston moves leftward. In the stop state, the electromagnetic valve two (7) and the electromagnetic valve three (8) are de-energized, and neither air is introduced into nor discharged from the left cavity (9) and the right cavity (10).

3. A hydro-turbine governor according to claim 2, wherein: The three-position five-way electromagnetic valve comprises an air inlet port P, an air outlet port A, an air outlet port B and an exhaust port R and an exhaust port S; the electromagnetic valve two (7) comprises a P1 port and an A1 port, the electromagnetic valve three (8) comprises a P2 port and a B1 port, the A port is connected to the P1 port, the B port is connected to the P2 port, the A1 port is communicated with the left cavity (9), and the B1 port is communicated with the right cavity (10); the P port can be communicated with one of the A port and the B port under the control of the electromagnetic valve, and the other air port is communicated with the exhaust port R or the exhaust port S.

4. A hydro-turbine governor according to claim 3, wherein: The electromagnetic valve one (6) controls the A port to be communicated with the exhaust port R or the air inlet port P, and controls the B port to be communicated with the exhaust port S or the air inlet port P.

5. A hydro-turbine governor according to claim 3, wherein: The utility model further comprises a pressure reducing valve (12) which is communicated with the electromagnetic valve one (6) to control the air pressure entering the electromagnetic valve one (6).

6. A hydro-turbine governor according to claim 2, wherein: The pipeline (2) is provided with a guide support (11), the cylinder (5) comprises a piston rod which is supported to pass through the guide support (11), and the end of the piston rod is connected to the valve head (3).

7. A hydro-turbine governor according to claim 6, wherein: The valve head (3) is a conical structure.

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