Pneumatic control mechanism and water turbine speed regulator

Abstract

The invention relates to the field of water turbine control, and discloses a pneumatic control mechanism and a water turbine governor, which comprise a water turbine main 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 invention relates to the field of water turbine speed regulation, in particular to a water turbine speed regulator with a pneumatic control mechanism. Background Art

[0002] Pneumatic motors are generally used as driving sources for pneumatic tools such as pneumatic grinders and pneumatic sandblasters. Pneumatic tools are generally equipped with a speed regulator for adjusting the rotation speed of the pneumatic motor. For example, a pneumatic tool equipped with a pneumatic motor and a speed regulator is described in Patent Document 1. In the pneumatic tool described in Patent Document 1, if the rotation speed of the pneumatic motor reaches a certain speed, the speed regulator will reduce the supply flow rate of compressed air supplied to the pneumatic motor so that the rotation speed of the pneumatic motor does not exceed the allowable speed determined for safety reasons. That is, in the pneumatic tool described in Patent Document 1, the speed regulator acts 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. This scheme only designs the structural part of the speed regulator, and does not explain the control part. This scheme is to provide a pneumatic speed regulator with a simple structure and simple and reliable control. Summary of the invention

[0003] The present invention aims at the shortcomings of the prior art and provides a turbine speed governor with a pneumatic control mechanism.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A pneumatic control mechanism includes a control component; the control component includes a cylinder for driving a valve head to move, and also includes a solenoid valve 1, a solenoid valve 2 and a solenoid valve 3 for controlling the action of the cylinder, the solenoid valve 1 is a three-position five-way valve, the solenoid valve 2 is a two-position two-way valve, and the solenoid valve 3 is a two-position two-way valve; the solenoid valve 2 and the solenoid valve 3 are normally closed valves, a piston cavity and a piston are arranged in the cylinder, the piston divides the piston cavity into a left cavity and a right cavity, the solenoid valve 2 is connected to the left cavity, and the solenoid valve 3 is connected to the right cavity; the solenoid valve 2 and the solenoid valve 3 are normally closed valves; the solenoid valve 1 is connected to the solenoid valve 1 and the solenoid valve 2;

[0006] Opening action, solenoid valve 1 is energized to connect to solenoid valve 2, solenoid valves 2 and 3 are energized, air enters the left chamber, air exits the right chamber, and the piston moves to the right;

[0007] Closing action, solenoid valve 1 is energized to connect to solenoid valve 2, solenoid valves 2 and 3 are energized, air enters the right chamber and exhausts from the left chamber, and the piston moves to the left;

[0008] In the stop state, solenoid valve 2 and solenoid valve 3 are powered off, and neither the left cavity nor the right cavity has air intake or exhaust.

[0009] Preferably, the three-position five-way solenoid valve includes an air inlet port P, an air outlet port A, an air outlet port B, an exhaust port R and an exhaust port S; solenoid valve two includes port P1 and port A1, solenoid valve three includes port P2 and port B1, port A is connected to port P1, port B is connected to port P2, port A1 is connected to the left cavity, and port B1 is connected to the right cavity; port P can be connected to one of port A and port B under the control of the solenoid valve, and the other port is connected to exhaust port R or exhaust port S.

[0010] Preferably, the solenoid valve controls port A to be connected to the exhaust port R or the air intake port P, and the solenoid valve controls port B to be connected to the exhaust port S or the air intake port P.

[0011] Preferably, a pressure reducing valve 12 is further included, and the pressure reducing valve 12 is connected to the solenoid valve 1 to control the air pressure entering the solenoid valve 1.

[0012] A turbine speed governor comprises a turbine body, a pipeline and a control mechanism; the turbine body comprises a water wheel driven by a motor; the pipeline is a water flow channel, and the flowing water generated by the turbine body flows in the pipeline; the control mechanism comprises a valve head and a pneumatic control mechanism as described in any one of claims 1 to 4, a valve port is provided in the pipeline, the valve head controls the opening and closing size of the valve port, and the control component controls the movement of the valve head.

[0013] Preferably, a guide bracket is provided in the pipeline, the cylinder comprises a piston rod, the piston rod support passes through the guide bracket, and the end of the piston rod is connected to the valve head.

[0014] Preferably, the valve head is a conical structure.

[0015] The present invention has the following significant technical effects due to the adoption of the above technical solution:

[0016] Compared with the prior art, the present invention has the following obvious advantages and positive effects: the entire control scheme is simple and reliable, and can be adjusted and improved as needed; secondly, the execution structure is stable and reliable, and the reciprocating motion has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the device in the open state.

[0018] Figure 2 It is a structural diagram of the device in the closed state.

[0019] Figure 3 It is the gas control schematic.

[0020] The technical names of the accompanying drawings are: 1-turbine body, 2-pipeline, 3-valve head, 4-valve port, 5-cylinder, 6-solenoid valve one, 7-solenoid valve two, 8-solenoid valve three, 9-left chamber, 10-right chamber, 11-guide bracket, 12-pressure reducing valve. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Example 1

[0023] A pneumatic control mechanism, comprising a control component; wherein the control component comprises a cylinder 5 for driving a valve head 3 to move, and also comprises a solenoid valve 1 6, a solenoid valve 2 7 and a solenoid valve 3 8 for controlling the action of the cylinder 5, the solenoid valve 1 6 is a three-position five-way valve, the solenoid valve 2 7 is a two-position two-way valve, and the solenoid valve 3 8 is a two-position two-way valve; the solenoid valve 2 7 and the solenoid valve 3 8 are normally closed valves, a piston cavity and a piston are arranged in the cylinder 5, the piston divides the piston cavity into a left cavity 9 and a right cavity 10, the solenoid valve 2 7 is connected to the left cavity 9, and the solenoid valve 3 8 is connected to the right cavity 10; the solenoid valve 2 7 and the solenoid valve 3 8 are normally closed valves; the solenoid valve 1 6 is connected to the solenoid valve 1 6 and the solenoid valve 2 7;

[0024] Opening action, solenoid valve 1 6 is energized to connect to solenoid valve 2 7, solenoid valve 2 7 and solenoid valve 3 8 are energized, air enters the left chamber 9, air is discharged from the right chamber 10, and the piston moves to the right;

[0025] Closing action, solenoid valve 1 6 is energized to connect to solenoid valve 2 7, solenoid valve 2 7 and solenoid valve 3 8 are energized, the right chamber 10 takes in air, the left chamber 9 exhausts air, and the piston moves left;

[0026] In the stop state, the electromagnetic valve 2 7 and the electromagnetic valve 3 8 are powered off, and the left chamber 9 and the right chamber 10 do not take in or out air.

[0027] The three-position five-way solenoid valve includes an air inlet port P, an air outlet port A, an air outlet port B, an exhaust port R and an exhaust port S; the solenoid valve 2 7 includes a P1 port and an A1 port, the solenoid valve 3 8 includes 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 connected to the left chamber 9, and the B1 port is connected to the right chamber 10; the P port can be connected to one of the A port and the B port under the control of the solenoid valve, and the other port is connected to the exhaust port R or the exhaust port S. In the initial state of the solenoid valve 1 6 in this embodiment, the air inlet port P is connected to the initial port A, the air outlet port B is connected to the exhaust port S, and in the power-off state, the A1 port is disconnected from the P1 port, and the B1 port is disconnected from the P2 port.

[0028] In this embodiment, the solenoid valve 6 controls the A port to be connected to the exhaust port R or the intake port P, and the solenoid valve 6 controls the B port to be connected to the exhaust port S or the intake port P.

[0029] In order to ensure the stability of the air pressure entering the entire control system, a pressure reducing valve 12 is also included, and the pressure reducing valve 12 is connected to the solenoid valve 6 to control the air pressure entering the solenoid valve 6. In this embodiment, the air pressure is controlled at 5.5Mpa.

[0030] Example 2

[0031] A water turbine speed governor comprises a water turbine body 1, a pipeline 2 and a control mechanism;

[0032] The main body 1 of the water turbine includes a water wheel, which is driven by a motor; the water wheel transports water when driven by the motor;

[0033] The pipeline 2 is a water flow channel, and the flowing water generated by the turbine body 1 flows in the pipeline 2; the control mechanism is mainly used to control the flow rate of the water flow in the pipeline 2.

[0034] The control mechanism includes a control component and a valve head 3. A valve port 4 is provided in the pipeline 2. The valve head 3 controls the opening and closing size of the valve port 4, and the control component controls the action of the valve head 3. A rubber sealing pad or a sealing ring is provided at the contact position between the valve port 4 and the valve head 3 to ensure the reliability of the sealing between the two.

[0035] The control component includes a cylinder 5 for driving the valve head 3 to move, and also includes a solenoid valve 1 6, a solenoid valve 2 7 and a solenoid valve 3 8 for controlling the movement of the cylinder 5. The solenoid valve 1 6 is a three-position five-way valve, the solenoid valve 2 7 is a two-position two-way valve, and the solenoid valve 3 8 is a two-position two-way valve; the solenoid valve 2 7 and the solenoid valve 3 8 are normally closed valves, and a piston cavity and a piston are provided in the cylinder 5. The piston divides the piston cavity into a left cavity 9 and a right cavity 10. The solenoid valve 2 7 is connected to the left cavity 9, and the solenoid valve 3 8 is connected to the right cavity 10; the solenoid valve 2 7 and the solenoid valve 3 8 are normally closed valves; the solenoid valve 1 6 is connected to the solenoid valve 1 6 and the solenoid valve 2 7;

[0036] Opening action, solenoid valve 1 6 is energized to connect to solenoid valve 2 7, solenoid valve 2 7 and solenoid valve 3 8 are energized, air enters the left chamber 9, air is discharged from the right chamber 10, and the piston moves to the right;

[0037] Closing action, solenoid valve 1 6 is energized to connect to solenoid valve 2 7, solenoid valve 2 7 and solenoid valve 3 8 are energized, the right chamber 10 takes in air, the left chamber 9 exhausts air, and the piston moves left;

[0038] In the stop state, the electromagnetic valve 2 7 and the electromagnetic valve 3 8 are powered off, and the left chamber 9 and the right chamber 10 do not take in or out air.

[0039] The three-position five-way solenoid valve includes an air inlet port P, an air outlet port A, an air outlet port B, an exhaust port R and an exhaust port S; the solenoid valve 2 7 includes a P1 port and an A1 port, the solenoid valve 3 8 includes 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 connected to the left chamber 9, and the B1 port is connected to the right chamber 10; the P port can be connected to one of the A port and the B port under the control of the solenoid valve, and the other port is connected to the exhaust port R or the exhaust port S. In the initial state of the solenoid valve 1 6 in this embodiment, the air inlet port P is connected to the initial port A, the air outlet port B is connected to the exhaust port S, and in the power-off state, the A1 port is disconnected from the P1 port, and the B1 port is disconnected from the P2 port.

[0040] In this embodiment, the solenoid valve 6 controls the A port to be connected to the exhaust port R or the intake port P, and the solenoid valve 6 controls the B port to be connected to the exhaust port S or the intake port P.

[0041] In order to ensure the stability of the air pressure entering the entire control system, a pressure reducing valve 12 is also included, and the pressure reducing valve 12 is connected to the solenoid valve 6 to control the air pressure entering the solenoid valve 6. In this embodiment, the air pressure is controlled at 5.5Mpa.

[0042] In this embodiment, a guide bracket 11 is arranged in the pipeline 2, and the cylinder 5 includes a piston rod, which passes through the guide bracket 11, and the end of the piston rod is connected to the valve head 3. The valve head 3 is a conical structure.

[0043] The specific working process is as follows:

[0044] When it is necessary to close the valve port 4, the air inlet port P and the air outlet port A in the solenoid valve 1 6 are connected, and the air outlet port B and the exhaust port S are connected. Since the solenoid valve 2 7 and the solenoid valve 3 8 are both in the energized state, the air flow at the exhaust port A enters the left chamber 9 through the P1 port and the A1 port, thereby pushing the piston to the right; then the air in the right chamber 10 is discharged from the exhaust port S through the B1 port, the P2 port, the air outlet port B, and the exhaust port S.

[0045] When it is necessary to open the valve port 4, the solenoid valve 1 6 is controlled to change the air inlet port P to be connected to the air outlet port B. At this time, the air outlet port A is connected to the exhaust port R. Since the solenoid valve 2 7 and the solenoid valve 3 8 are both in the energized state, the air flow at the exhaust port B enters the left chamber 9 through the P2 port and the B1 port, thereby pushing the piston to move left; then the air in the left chamber 9 is discharged from the exhaust port R through the A1 port, the P1 port, the air outlet port A, and the exhaust port R.

[0046] When the valve head 3 needs to be kept in the current position, it can be achieved by simply disconnecting the solenoid valve 2 7 and the solenoid valve 3 8. In this state, the left chamber 9 and the right chamber 10 are disconnected from the external air path, so that the current state can be maintained.

[0047] Example 3

[0048] This embodiment discloses a turbine speed governor, which differs from Embodiment 2 in that the pressure entering the air inlet port P is 5.6 MPa.

[0049] Example 4

[0050] This embodiment discloses a turbine speed governor, which differs from Embodiment 2 in that the pressure entering the air inlet port P is 5.8 MPa.

Claims

1. A pneumatic control mechanism, characterized in that: The invention comprises a control component; the control component comprises a cylinder (5) for driving a valve head (3) to move, and also comprises a solenoid valve 1 (6), a solenoid valve 2 (7) and a solenoid valve 3 (8) for controlling the movement of the cylinder (5); the solenoid valve 1 (6) is a three-position five-way valve, the solenoid valve 2 (7) is a two-position two-way valve, and the solenoid valve 3 (8) is a two-position two-way valve; the solenoid valve 2 (7) and the solenoid valve 3 (8) are normally closed valves; a piston chamber and a piston are arranged in the cylinder (5); the piston divides the piston chamber into a left chamber (9) and a right chamber (10); the solenoid valve 2 (7) is connected to the left chamber (9), and the solenoid valve 3 (8) is connected to the right chamber (10); the solenoid valve 2 (7) and the solenoid valve 3 (8) are normally closed valves; the solenoid valve 1 (6) is connected to the solenoid valve 1 (6) and the solenoid valve 2 (7); In the opening action, the solenoid valve 1 (6) is energized to be connected to the solenoid valve 2 (7), the solenoid valve 2 (7) and the solenoid valve 3 (8) are energized, the left chamber (9) takes in air, the right chamber (10) exhausts air, and the piston moves to the right; Closing action, solenoid valve 1 (6) is energized and connected to solenoid valve 2 (7), solenoid valve 2 (7) and solenoid valve 3 (8) are energized, the right chamber (10) takes in air, the left chamber (9) exhausts air, and the piston moves to the left; In the stop state, the electromagnetic valve 2 (7) and the electromagnetic valve 3 (8) are powered off, and the left chamber (9) and the right chamber (10) do not inlet or outlet air.

2. A pneumatic control mechanism according to claim 1, characterized in that: The three-position five-way solenoid valve comprises an air inlet port P, an air outlet port A, an air outlet port B, an exhaust port R and an exhaust port S; the second solenoid valve (7) comprises a P1 port and an A1 port, the third solenoid valve (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 connected to the left chamber (9), and the B1 port is connected to the right chamber (10); the P port can be connected to one of the A port and the B port under the control of the solenoid valve, and the other port is connected to the exhaust port R or the exhaust port S.

3. A pneumatic control mechanism according to claim 2, characterized in that: Solenoid valve 1 (6) controls port A to communicate with exhaust port R or air intake port P, and solenoid valve 1 (6) controls port B to communicate with exhaust port S or air intake port P.

4. A pneumatic control mechanism according to claim 2, characterized in that: It also includes a pressure reducing valve 12, which is connected to the solenoid valve 1 (6) to control the air pressure entering the solenoid valve 1 (6).

5. A turbine speed governor, characterized in that: The invention comprises a turbine body (1), a pipeline (2) and a control mechanism; the turbine body (1) comprises a water wheel, which is driven by a motor; the pipeline (2) is a water flow channel, and the flowing water generated by the turbine body (1) flows in the pipeline (2); the control mechanism comprises a valve head and a pneumatic control mechanism as described in any one of claims 1 to 4, a valve port (4) is provided in the pipeline (2), the valve head (3) controls the opening and closing size of the valve port (4), and the control component controls the movement of the valve head (3).

6. The turbine speed governor according to claim 5, characterized in that: A guide bracket (11) is arranged in the pipeline (2), and the cylinder (5) comprises a piston rod, the piston rod support passes through the guide bracket (11), and the end of the piston rod is connected to the valve head (3).

7. The turbine speed governor according to claim 6, characterized in that: The valve head (3) is a conical structure.

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