Quick-closing adjusting type actuator

Abstract

A quick-closing adjusting type actuator comprises a machine shell, a hydraulic control unit, a transmission device and an electric appliance control box, the hydraulic control unit comprises an oil return port, a pressure oil inlet, a safety oil port, an opening degree system, a quick-closing system and a locking system, the quick-closing system comprises an electromagnetic ball valve, the electromagnetic ball valve is communicated with a one-way throttle valve and a cartridge valve, and the one-way throttle valve is communicated with the cartridge valve. A first stop valve is communicated between the cartridge valve and the one-way throttle valve; the opening system comprises a second stop valve; the second stop valve is communicated with a high-pressure filter, a first one-way valve, a proportional valve, a first pressure sensor and a second pressure sensor; the locking system comprises a locking electromagnetic valve, a first hydraulic control one-way valve and a second hydraulic control one-way valve. According to the actuator, two modes of local operation and remote operation can be set, the functions of butterfly valve adjustment control, valve opening adjustment, valve quick action, fault locking and the like are achieved in two places respectively, and a quick-closing adjustment butterfly valve system is composed of an electromagnetic ball valve, a cartridge valve, a proportional valve and a locking electromagnetic valve.

Description

Technical Field

[0001] The utility model relates to a fast-closing regulating actuator, belonging to the field of valve elements. Background Art

[0002] In the field of fluid control and valve automation industry, valve actuators are indispensable valve driving devices for realizing valve program control, automatic control and remote control. Due to the continuous improvement of control technology and control requirements, electric actuators can no longer meet the requirements of valve actuators in terms of electrical explosion protection, action speed, response time, etc., and pneumatic, hydraulic, gas-liquid linkage and electro-hydraulic linkage actuators are thus applied. Generally, fast-closing butterfly valves are required to close quickly when powered on or off, and close quickly when pressure is lost. This is a fast-closing regulating butterfly valve hydraulic system with very special performance requirements used in steam turbine power generation. The system is required to adjust the opening of the valve, the valve moves quickly and the valve locks. When this system is powered on, the valve moves, and when it is off, it remains in place; when a signal is given, the valve closes quickly; it is required that the valve cannot close quickly when power is lost, pressure is lost, and signal is lost; when not in action, the solenoid valve must be in a power-off state.

[0003] However, the existing quick-closing actuators have poor stability and are prone to valve failure, which affects normal use. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a fast-closing regulating actuator.

[0005] A quick-closing regulating actuator comprises a casing, a hydraulic control unit, a transmission device and an electrical control box, wherein the hydraulic control unit comprises an oil return port, a pressure oil inlet port, a safety oil port, an opening system, a quick-closing system and a locking system, wherein the quick-closing system comprises an electromagnetic ball valve, wherein the electromagnetic ball valve is connected to a one-way throttle valve and a cartridge valve, wherein a first stop valve is connected between the cartridge valve and the one-way throttle valve; wherein the opening system comprises a second stop valve, wherein the second stop valve is connected to a high-pressure filter, a first one-way valve, a proportional valve, a first pressure sensor and a second pressure sensor; wherein the locking system comprises a locking electromagnetic valve, a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve.

[0006] This actuator can be set up in two modes: local operation and remote operation. It can realize the regulation and control of the butterfly valve in two locations respectively, and adjust the valve opening, valve rapid action and fault locking functions. The quick-closing regulating butterfly valve system is composed of electromagnetic ball valve and cartridge valve, proportional valve and locking electromagnetic valve. It has a compact appearance and simple structure. It can keep the quick-closing regulating butterfly valve in place when power is off, pressure is lost and signal is lost. The valve closes quickly when the quick-closing signal is received. The use effect is stable and reliable, which can extend the service life of the product.

[0007] Preferably, the first one-way valve is communicated with the locking solenoid valve, the proportional valve and the solenoid ball valve, and the oil outlet of the proportional valve is provided with a second one-way valve communicated with the oil return port.

[0008] The hydraulic oil filtered by the high-pressure filter is delivered to the locking solenoid valve, the proportional valve and the solenoid ball valve through the first one-way valve, and the second one-way valve can control the connection state between the proportional valve and the oil return port.

[0009] Preferably, the oil outlet of the electromagnetic ball valve is provided with an accumulator.

[0010] Under normal conditions, the solenoid ball valve is in a de-energized state (neutral position), and the valve locking function is achieved by relying on the pressure oil in the accumulator.

[0011] Furthermore, the second hydraulically controlled one-way valve is connected to a third stop valve.

[0012] Preferably, the oil return port, the pressure oil inlet port, and the safety oil port are respectively connected to an oil return check valve, an oil inlet stop valve, and a safety oil check valve.

[0013] The oil return check valve, oil inlet stop valve and safety oil check valve are provided so that the valve block can be repaired online and components replaced.

[0014] Preferably, the first pressure sensor is arranged at one end of the pressure oil inlet, the pressure oil inlet is connected to a pressure measuring joint, and the pressure measuring joint is connected to a pressure gauge.

[0015] The pressure gauge facilitates direct observation of system pressure, and the first pressure sensor and the second pressure sensor can transmit pressure signals to the electrical control device.

[0016] Preferably, the actuator includes a spring cylinder, an oil cylinder and a shift fork connected to the valve, the spring cylinder is provided with a first piston and a spring group, the oil cylinder is provided with a second piston, the first piston and the second piston are connected to each other through a piston rod, the shift fork is arranged in the middle of the piston rod and is linked with the piston rod, when the oil cylinder is filled with oil, the second piston is pushed, the piston rod drives the first piston to move in the spring cylinder, and at the same time drives the shift fork to move to open the valve, and the spring group is compressed; when the oil cylinder is drained of oil, the first piston and the second piston move in the spring cylinder and the oil cylinder respectively in the opposite direction, and the piston rod drives the shift fork to move in the opposite direction to close the valve.

[0017] The four springs are divided into two specifications, large and small, and are coaxially sleeved. The sleeved springs are then connected in series. The length of the springs is halved while still performing their original functions, the rigidity is enhanced, and the stability and service life are improved.

[0018] Furthermore, the spring group includes a first outer spring, a second outer spring, a first inner spring and a second inner spring, one end of the first outer spring and the first inner spring is arranged on the spring end cover of the spring cylinder away from the fork, the other end of the first outer spring and the first inner spring is provided with a guide plate, the second outer spring and the second inner spring are arranged at the other end of the guide plate, and the first piston is connected to the second outer spring and the second inner spring.

[0019] Furthermore, an adjusting screw connected to the piston rod is provided in the oil cylinder, the adjusting screw is connected to an oil cylinder end cover, and the hydraulic control unit is arranged on the oil cylinder end cover.

[0020] Since the fast closing regulating valve closes within 0.2-0.5 seconds, the time is fast and the impact is large. In order to protect the valve, a reliable buffer device is necessary. The buffer device of this actuator consists of two parts: an adjusting screw and a one-way throttle valve. The adjusting screw can adjust the buffer angle of the valve and the closing position of the valve, and the one-way throttle valve can adjust the buffer speed. Since the one-way throttle valve is a hydraulic component produced by a professional manufacturer, it is easy and reliable to adjust.

[0021] Furthermore, the shift fork is provided with an oblique groove, and the shift fork is connected to the piston rod through the oblique groove.

[0022] The shift fork is arranged with an oblique groove, so that the output torque of the actuator is doubled when the valve is in the closed position.

[0023] The beneficial effects of the utility model are as follows: the actuator can be set to two modes: local operation and remote operation, and can realize the regulation and control of the butterfly valve in the two places respectively, and adjust the valve opening, valve rapid action and fault locking functions. The quick-closing regulating butterfly valve system is composed of an electromagnetic ball valve and a cartridge valve, a proportional valve and a locking electromagnetic valve. It has a compact appearance and a simple structure. It can keep the quick-closing regulating butterfly valve in place when power is off, pressure is lost and signal is lost. The valve closes quickly when a quick-closing signal is received. The use effect is stable and reliable, and the service life of the product can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0025] Figure 1 It is the hydraulic principle diagram of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the actuator in the utility model;

[0027] In the figure, 1, hydraulic control unit; T, oil return port; P, pressure oil inlet port; S, safety oil port; H22, solenoid ball valve; V11, one-way throttle valve; F11, cartridge valve; Z22, first stop valve; Z11, second stop valve; G11, high-pressure filter; D21, first one-way valve; H11, proportional valve; M11, first pressure sensor; M12, second pressure sensor; H21, locking solenoid valve; E11, first hydraulic control one-way valve; E12, second hydraulic control one-way valve; D11, second one-way valve ; N11, accumulator; Z21, third stop valve; D31, return oil check valve; Z21, oil inlet stop valve; D41, safety oil check valve; C11, pressure measuring joint; W11, pressure gauge; 2, spring cylinder; 31, oil cylinder; 8, shift fork; 12, inclined groove; 6, first piston; 18, second piston; 16, piston rod; 3, first outer spring; 2, second outer spring; 4, first inner spring; 7, second inner spring; 11, spring end cover; 5, guide plate; 29, adjusting screw; 26, oil cylinder end cover. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0029] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0030] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0031] like Figure 1-2As shown, an embodiment of a fast-closing regulating actuator of the utility model includes a housing, a hydraulic control unit 1, a transmission device and an electrical control box. The hydraulic control unit 1 includes an oil return port T, a pressure oil inlet port P, a safety oil port S, an opening system, a fast-closing system and a locking system. The fast-closing system includes an electromagnetic ball valve H22, and the electromagnetic ball valve H22 is connected to a one-way throttle valve V11 and a cartridge valve F11. A first stop valve Z22 is connected between the cartridge valve F11 and the one-way throttle valve V11; the opening system includes a second stop valve Z11, and the second stop valve Z11 is connected to a high-pressure filter G11, a first one-way valve D21, a proportional valve H11, a first pressure sensor M11 and a second pressure sensor M12; the locking system includes a locking electromagnetic valve H21, a first hydraulically controlled one-way valve E11 and a second hydraulically controlled one-way valve E12.

[0032] This actuator can be set up in two modes: local operation and remote operation. It can realize the regulation and control of the butterfly valve in two locations respectively, and adjust the valve opening, valve rapid action and fault locking functions. The quick-closing regulating butterfly valve system consists of the electromagnetic ball valve H22 and the cartridge valve F11, the proportional valve H11 and the locking electromagnetic valve H21. It has a compact appearance and a simple structure. It can keep the quick-closing regulating butterfly valve in place when the power is off, the pressure is lost, and the signal is lost. The valve closes quickly when the quick-closing signal is received. The use effect is stable and reliable, which can extend the service life of the product.

[0033] The first one-way valve D21 is connected to the locking solenoid valve H21, the proportional valve H11 and the electromagnetic ball valve H22. The oil outlet of the proportional valve H11 is provided with a second one-way valve D11 connected to the oil return port T. The hydraulic oil filtered by the high-pressure filter G11 is delivered to the locking solenoid valve H21, the proportional valve H11 and the electromagnetic ball valve H22 through the first one-way valve D21. The second one-way valve D11 can control the connection state between the proportional valve H11 and the oil return port T. The electromagnetic ball valve H22 adopts a three-position three-way electromagnetic ball valve H22. The electromagnetic valve adopts power-on action and power-off retention. Under the condition of power-off and pressure-off with loss of signal, the butterfly valve remains in place.

[0034] The oil outlet of the electromagnetic ball valve H22 is provided with an accumulator N11. Under normal conditions, the electromagnetic ball valve H22 is in a power-off state (neutral position), and the valve locking function is realized by the pressure oil of the accumulator N11.

[0035] The second hydraulically controlled one-way valve E12 is connected to the third stop valve Z21.

[0036] The oil return port T, the pressure oil inlet port P, and the safety oil port S are respectively connected to the oil return check valve D31, the oil inlet stop valve Z21, and the safety oil check valve D41. The oil return check valve D31, the oil inlet stop valve Z21, and the safety oil check valve D41 are provided so that the valve block can be repaired online and components can be replaced.

[0037] The first pressure sensor M11 is arranged at one end of the pressure oil inlet P, and the pressure oil inlet P is connected to a pressure measuring joint C11, and the pressure measuring joint C11 is connected to a pressure gauge W11. The pressure gauge W11 is convenient for directly observing the system pressure, and the first pressure sensor M11 and the second pressure sensor M12 can transmit pressure signals to the electrical control device.

[0038] It can be seen from the hydraulic principle diagram that when the pressure oil (12MPa) of the main system enters this system, it is filtered by the high-pressure filter (G11), and after passing through the first one-way valve (D21), the pressure oil enters the locking solenoid valve (H21), the proportional valve (H11) and the electromagnetic ball valve (H22). When the locking solenoid valve (H21) loses power, the first hydraulic one-way valve and the second hydraulic one-way valve (E11 and E12) are in a closed state. At this time, the external pressure oil cannot enter, and the oil in the cylinder cannot come out, and the valve position is in a locked state;

[0039] When the locking solenoid valve (H21) is energized, the pressure oil opens the first hydraulically controlled check valve and the second hydraulically controlled check valve (E11 and E12), and the locking function is released; when the proportional valve (H11) is energized, the hydraulic cylinder is connected to the pressure oil or the return oil tank, and the valve opening can be adjusted; when the electromagnetic ball valve (H22) SV2 is energized, it can cooperate with the locking solenoid valve (H21) to realize the low oil pressure locking function, and when the electromagnetic ball valve (H22) SV3 is energized, the valve is quickly moved, the cartridge valve (F11) is connected, and the valve is quickly closed. Under normal conditions, the electromagnetic ball valve (H22) is in a de-energized state (middle position), and the valve locking function is realized by relying on the pressure oil in the accumulator (N11).

[0040] During normal operation, the safety oil pressure at the safety oil port S is higher than the pressure oil pressure at the pressure oil inlet P, and the safety oil check valve (D41) is supported by the safety oil. When the safety oil loses pressure, the pressure oil at the tail of the accumulator (N11) and the cartridge valve (F11) is quickly discharged, the cartridge valve is connected, and the valve is quickly closed.

[0041] In order to reduce the impact on the hydraulic pipeline when the fast-acting valve is in operation, a one-way throttle valve (V11) is provided to provide damping for the fast-acting valve when the fast-acting solenoid valve is in operation.

[0042] The actuator includes a spring cylinder 2, an oil cylinder 31 and a shift fork 8 connected to the valve. The spring cylinder 2 is provided with a first piston 6 and a spring group. The oil cylinder 31 is provided with a second piston 18. The first piston 6 and the second piston 18 are connected to each other through a piston rod 16. The shift fork 8 is arranged in the middle of the piston rod 16 and is linked with the piston rod 16. When the oil cylinder 31 is filled with oil, the second piston 18 is pushed, and the piston rod 16 drives the first piston 6 to move in the spring cylinder 2, and at the same time drives the shift fork 8 to move to open the valve, and the spring group is compressed; when the oil cylinder 31 is drained of oil, the first piston 6 and the second piston 18 move in the spring cylinder 2 and the oil cylinder 31 respectively in the opposite direction, and the piston rod 16 drives the shift fork 8 to move in the opposite direction to close the valve.

[0043] The four springs are divided into two specifications, large and small, and are coaxially sleeved. The sleeved springs are then connected in series. The length of the springs is halved while still performing their original functions, the rigidity is enhanced, and the stability and service life are improved.

[0044] The spring group includes a first outer spring 3, a second outer spring 2, a first inner spring 4 and a second inner spring 7. One end of the first outer spring 3 and the first inner spring 4 is arranged on a spring end cover 11 of the spring cylinder 2 away from the fork 8. The other end of the first outer spring 3 and the first inner spring 4 is provided with a guide plate 5. The second outer spring 2 and the second inner spring 7 are arranged at the other end of the guide plate 5. The first piston 6 is connected to the second outer spring 2 and the second inner spring 7.

[0045] An adjusting screw 29 connected to the piston rod 16 is provided in the oil cylinder 31 . The adjusting screw 29 is connected to an end cover of the oil cylinder 31 . The hydraulic control unit 1 is provided on the end cover of the oil cylinder 31 .

[0046] Since the fast closing regulating valve closes within 0.2-0.5 seconds, the time is fast and the impact is large. In order to protect the valve, a reliable buffer device is necessary. The buffer device of this actuator consists of two parts: the adjusting screw 29 and the one-way throttle valve V11. The adjusting screw 29 can adjust the buffer angle of the valve and the closing position of the valve, and the one-way throttle valve V11 can adjust the buffer speed. Since the one-way throttle valve V11 is a hydraulic component produced by a professional manufacturer, it is easy and reliable to adjust.

[0047] The shift fork 8 is provided with an oblique groove 12, and the shift fork 8 is connected to the piston rod 16 through the oblique groove 12. The shift fork 8 is provided with the oblique groove 12, so that the output torque of the actuator is doubled when the valve is in the closed position.

[0048] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0049] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A fast closing regulating actuator, characterized in that: It includes a casing, a hydraulic control unit, a transmission device and an electrical control box. The hydraulic control unit includes an oil return port, a pressure oil inlet port, a safety oil port, an opening system, a quick closing system and a locking system. The quick closing system includes an electromagnetic ball valve. The electromagnetic ball valve is connected to a one-way throttle valve and a cartridge valve. A first stop valve is connected between the cartridge valve and the one-way throttle valve. The opening system includes a second stop valve, which is connected to a high-pressure filter, a first one-way valve, a proportional valve, a first pressure sensor, and a second pressure sensor; The locking system comprises a locking solenoid valve, a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve.

2. The fast closing regulating actuator according to claim 1, characterized in that: The first one-way valve is communicated with the locking electromagnetic valve, the proportional valve and the electromagnetic ball valve, and the oil outlet of the proportional valve is provided with a second one-way valve communicated with the oil return port.

3. The fast closing regulating actuator according to claim 2, characterized in that: An accumulator is provided at the oil outlet of the electromagnetic ball valve.

4. The fast closing regulating actuator according to claim 1, characterized in that: The second hydraulically controlled one-way valve is connected to a third stop valve.

5. The fast closing regulating actuator according to claim 1, characterized in that: The oil return port, the pressure oil inlet port and the safety oil port are respectively connected with an oil return check valve, an oil inlet stop valve and a safety oil check valve.

6. The fast closing regulating actuator according to claim 1, characterized in that: The first pressure sensor is arranged at one end of the pressure oil inlet, the pressure oil inlet is connected to a pressure measuring joint, and the pressure measuring joint is connected to a pressure gauge.

7. The fast closing regulating actuator according to claim 1, characterized in that: The actuator includes a spring cylinder, an oil cylinder and a shift fork connected to the valve, a first piston and a spring group are arranged in the spring cylinder, a second piston is arranged in the oil cylinder, the first piston and the second piston are connected to each other through a piston rod, the shift fork is arranged in the middle of the piston rod and is linked with the piston rod, when the oil cylinder is filled with oil, the second piston is pushed, the piston rod drives the first piston to move in the spring cylinder, and at the same time drives the shift fork to move to open the valve, and the spring group is compressed; when the oil cylinder is drained of oil, the first piston and the second piston move in the spring cylinder and the oil cylinder respectively in the opposite direction, and the piston rod drives the shift fork to move in the opposite direction to close the valve.

8. The fast closing regulating actuator according to claim 7, characterized in that: The spring group includes a first outer spring, a second outer spring, a first inner spring and a second inner spring, one end of the first outer spring and the first inner spring is arranged on a spring end cover of the spring cylinder away from the fork, the other end of the first outer spring and the first inner spring is provided with a guide plate, the second outer spring and the second inner spring are arranged at the other end of the guide plate, and the first piston is connected to the second outer spring and the second inner spring.

9. The fast closing regulating actuator according to claim 7, characterized in that: An adjusting screw connected to the piston rod is arranged in the oil cylinder, the adjusting screw is connected to an oil cylinder end cover, and the hydraulic control unit is arranged on the oil cylinder end cover.

10. The fast closing regulating actuator according to claim 7, characterized in that: The shift fork is provided with an oblique groove, and the shift fork is connected to the piston rod through the oblique groove.

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