阅读说明：本技术 平衡刚性反馈双向自稳定行程调节保护装置及使用方法 (Balanced rigid feedback bidirectional self-stabilizing stroke adjusting and protecting device and using method ) 是由 潘健 于 2020-08-20 设计创作，主要内容包括：本发明涉及一种平衡刚性反馈双向自稳定行程调节保护装置及使用方法,其中平衡刚性反馈双向自稳定行程调节保护装置包括相连通的综合滑阀和油动机,所述油动机的伸出杆上刚性连接有驱动综合滑阀阀芯移动的驱动装置,综合滑阀阀芯与综合滑阀壳体通过第一弹簧连接。本发明通过刚性反馈,避免产生波动,实现了双向自稳定行程调节保护,油动机与综合滑阀可以同向移动反馈,也可相对移动反馈,并且可同时兼容多种保护及多种调节方式,可使用于油压缸、水压缸和气压缸,也可用于汽轮机的调速系统及保护、阀门的开关及保护等行程的控制及保护系统。(The invention relates to a balanced rigidity feedback bidirectional self-stabilizing stroke adjusting and protecting device and a using method thereof, wherein the balanced rigidity feedback bidirectional self-stabilizing stroke adjusting and protecting device comprises a comprehensive slide valve and a servomotor which are communicated, an extension rod of the servomotor is rigidly connected with a driving device for driving a valve core of the comprehensive slide valve to move, and the valve core of the comprehensive slide valve is connected with a casing of the comprehensive slide valve through a first spring. The invention avoids the generation of fluctuation through rigid feedback, realizes the bidirectional self-stabilization stroke regulation protection, can feed back the servomotor and the comprehensive slide valve in the same direction, can feed back the servomotor and the comprehensive slide valve in a relative movement manner, can be compatible with various protection and various regulation modes at the same time, can be used for an oil hydraulic cylinder, a hydraulic cylinder and a pneumatic cylinder, and can also be used for a speed regulation system and a control and protection system of strokes of protection, valve opening and closing, protection and the like of a steam turbine.)

1. A balanced rigid feedback bidirectional self-stabilizing stroke regulation protection device comprises a comprehensive slide valve (7) and a servomotor (5) which are communicated, and is characterized in that: and an extension rod (4) of the servomotor is rigidly connected with a driving device for driving the valve core of the comprehensive slide valve to move, and the valve core of the comprehensive slide valve is connected with the shell of the comprehensive slide valve through a first spring (6).

2. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 1, wherein: the driving device comprises a feedback rod (3) fixedly connected with the extension rod (4) and a screw rod (2) connected with the feedback rod through threads, and the lower end of the screw rod is axially jacked to a valve core (1) of the comprehensive sliding valve;

the first oil port (10) of the comprehensive slide valve is communicated with a rodless cavity of the servomotor, and the second oil port (9) of the comprehensive slide valve is communicated with a rod cavity of the servomotor.

3. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 1, wherein: the driving device comprises a feedback rod (3) fixedly connected with the extension rod (4), a valve core of the comprehensive slide valve is perpendicular to the extension rod of the servomotor, the length direction of the feedback rod is consistent with the axial direction of the extension rod, one side of the feedback rod, which faces the comprehensive valve core, is an inclined plane, a screw seat is fixedly connected onto the valve core, an installation rod is in threaded connection onto the screw seat, and the end part of the installation rod is rotatably connected with a rotating wheel which is propped against the inclined plane of the feedback rod; the first oil port (10) of the comprehensive slide valve is communicated with a rodless cavity of the servomotor, and the second oil port (9) of the comprehensive slide valve is communicated with a rod cavity of the servomotor.

4. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 1, wherein: the driving device comprises a feedback rod fixedly connected with the extension rod, a screw rod in threaded connection with the feedback rod, and a hinged support (12) fixedly arranged, wherein a lever (11) with one end extending to the lower part of the screw rod is hinged on the hinged support, the other end of the lever extends to the upper part of a valve core of the comprehensive slide valve, a second spring (13) for pressing the lever to the valve core of the comprehensive slide valve is arranged on one side of the hinged support away from the screw rod, and the elasticity of the second spring is greater than that of the first spring;

the first oil port of the comprehensive slide valve is communicated with the rod cavity of the servomotor, and the second oil port of the comprehensive slide valve is communicated with the rodless cavity of the servomotor.

5. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 4, wherein: the fixed cover (14) covering the upper part of the valve core is fixedly connected to the shell of the comprehensive slide valve, a through hole for the lever to move is formed in the side wall of the fixed cover, the top of the fixed cover is connected with an adjusting screw rod (15) through threads, the lower end of the adjusting screw rod extends into the fixed cover and is fixedly connected with a pressing plate, a guide pillar extending into the second spring is arranged on the pressing plate, and the lower end of the second spring is propped against the lever.

6. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 4, wherein: the driving device also comprises a motor for driving the screw rod to rotate.

7. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 4, wherein: the second spring is a tension spring (16) with the lower end fixed, and the upper end of the tension spring is connected with one end of the lever far away from the screw rod.

8. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 1, wherein: the driving device comprises a feedback rod fixedly connected with the extension rod, a hinged support fixedly arranged and a lever hinged with the hinged support and positioned above the valve core of the comprehensive slide valve, one end of the lever is connected with the feedback rod through an electromagnetic band-type brake mechanism (23), the other end of the lever is connected with a spring centering device (24), the force of the spring centering device is greater than the elastic force of a first spring, two sides of the hinged support are respectively provided with an adjusting oil cylinder for driving the lever to enable the comprehensive slide valve to move up and down, and one end of the lever is provided with a manual handle;

the first oil port of the comprehensive slide valve is communicated with the rod cavity of the servomotor, and the second oil port of the comprehensive slide valve is communicated with the rodless cavity of the servomotor.

9. The balanced rigid feedback bi-directional self-stabilizing stroke adjustment protection device of claim 8, wherein: the spring centering device comprises an upper sleeve and a lower sleeve which are fixedly arranged, an upper ejector block and an upper pressure spring which vertically pushes the upper ejector block downwards to the upper surface of the lever are arranged in the upper sleeve, and a lower ejector block and a lower pressure spring (26) which vertically pushes the lower ejector block upwards to the lower surface of the lever are arranged in the lower sleeve; a top plate of the upper sleeve is connected with a pre-tightening screw I through threads, the lower end of the pre-tightening screw I is fixedly connected with a pre-tightening plate I, and a limiting table extending to an upper spring inner ring is arranged on the pre-tightening plate I; and a bottom plate of the lower sleeve is connected with a pre-tightening screw II (25) through threads, the upper end of the pre-tightening screw II is fixedly connected with a pre-tightening plate II, and the pre-tightening plate II is provided with a limiting table extending to the inner ring of the lower spring.

10. A use method of the balance rigid feedback bidirectional self-stabilization stroke adjustment protection device as claimed in any one of claims 1 to 9, wherein the use method comprises the following steps: the driving device is rigidly connected with the extension rod, the valve core of the comprehensive slide valve is pressed downwards by the driving device, the extension rod of the servomotor acts through the movement of the valve core, when the extension rod of the servomotor moves, the driving device is driven to move integrally away from the valve core, the valve core is driven to move upwards by the resilience force of the first spring, an oil inlet pipeline and an oil drainage pipeline of the servomotor are blocked, and the extension rod of the servomotor reaches a balanced and stable state.

Technical Field

The invention relates to the field of balance feedback devices, in particular to a balance rigid feedback bidirectional self-stabilization stroke adjusting and protecting device and a using method thereof.

Background

The stroke adjustment protection is realized by feeding back the actuating component to reach a balanced state, and is a design principle commonly used by technical personnel, but the existing stroke adjusting device has the defects of complex adjustment, large fluctuation and poor stability when in use, and the prior stroke adjusting device cannot be mutually compatible among manual operation, electric operation and hydraulic operation, so that the application range is greatly limited.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a balanced rigid feedback bidirectional self-stabilizing stroke adjusting and protecting device which avoids the generation of fluctuation and has good compatibility through rigid feedback.

The invention is realized by the following technical scheme, and provides a balanced rigid feedback bidirectional self-stabilizing stroke regulation protection device which comprises a comprehensive slide valve and an oil-operated machine which are communicated, wherein an extension rod of the oil-operated machine is rigidly connected with a driving device for driving a valve core of the comprehensive slide valve to move, and the valve core of the comprehensive slide valve is connected with a casing of the comprehensive slide valve through a first spring.

According to the scheme, the driving device is rigidly connected with the extension rod, the feedback is accurate, the fluctuation is avoided, when the extension rod of the servomotor moves, the valve core is driven to move by the resilience force of the first spring, so that an oil inlet pipeline and an oil drainage pipeline of the servomotor are blocked, the action is more timely, and the extension rod of the servomotor reaches a balanced and stable state.

As optimization, the driving device comprises a feedback rod fixedly connected with the extension rod and a screw rod in threaded connection with the feedback rod, and the lower end of the screw rod axially props against a valve core of the comprehensive slide valve; the first oil port of the comprehensive slide valve is communicated with a rodless cavity of the servomotor, and the second oil port of the comprehensive slide valve is communicated with a rod cavity of the servomotor. When the optimized scheme is used, the screw rod is screwed downwards to enable the screw rod to jack the valve core of the comprehensive slide valve downwards, the valve core moves downwards, the oil inlet cavity of the comprehensive slide valve is communicated with the rodless cavity of the servomotor through the first oil port, the oil return cavity of the comprehensive slide valve is communicated with the rod cavity of the servomotor through the second oil port, high-pressure oil enters the rodless cavity of the servomotor, oil in the rod cavity flows to the oil return cavity, the extension rod of the servomotor moves upwards to drive the rigid feedback rod to move upwards, the screw rod is driven to move upwards when the feedback rod moves upwards, the pressure of the screw rod on the valve core is lost, the valve core moves upwards under the action of the first spring to seal the first oil port and the second oil port, the extension rod of the servomotor stops moving, and the servomotor, the rigid feedback rod and the comprehensive slide valve reach a new balance point; similarly, when the screw rod is screwed upwards in a balanced state, the valve core moves upwards under the action of the first spring to enable the first oil port to be communicated with the rod cavity, the second oil port is communicated with the rodless cavity, the extension rod of the hydraulic servomotor moves downwards to drive the screw rod to move downwards, and therefore the valve core moves downwards to plug the first oil port and the second oil port, and balance is achieved.

As optimization, the driving device comprises a feedback rod fixedly connected with the extension rod, a screw rod in threaded connection with the feedback rod, and a fixed hinged support, wherein a lever with one end extending to the lower part of the screw rod is hinged on the hinged support, the other end of the lever extends to the upper part of a valve core of the comprehensive slide valve, a second spring for pressing the lever to the valve core of the comprehensive slide valve is arranged on one side of the hinged support away from the screw rod, and the elastic force of the second spring is greater than that of the first spring; the first oil port of the comprehensive slide valve is communicated with the rod cavity of the servomotor, and the second oil port of the comprehensive slide valve is communicated with the rodless cavity of the servomotor. According to the optimization scheme, the screw rod is moved downwards by rotating the screw rod, one end of the lever is driven to move downwards, the other end of the lever is lifted, the valve core of the comprehensive slide valve moves upwards under the action of the first spring, high-pressure oil enters the rodless cavity of the servomotor through the second oil port, the extension rod of the servomotor moves upwards to drive the feedback rod and the screw rod to move upwards, the lever presses the valve core downwards under the action of the second spring, the valve core moves downwards to seal the first oil port and the second oil port, the servomotor stops acting, and the servomotor, the lever and the comprehensive slide valve reach a new balance point.

As optimization, a fixed cover covering the upper part of the valve core is fixedly connected to a shell of the comprehensive slide valve, a through hole for the lever to move is formed in the side wall of the fixed cover, the top of the fixed cover is connected with an adjusting screw rod through threads, the lower end of the adjusting screw rod extends into the fixed cover and is fixedly connected with a pressing plate, a guide pillar extending into the second spring is arranged on the pressing plate, and the lower end of the second spring is propped against the lever. This optimization scheme sets up the second spring in the lever top, can realize the adjustment to second spring pretightning force through rotating adjusting screw, through setting up the guide pillar, avoids the second spring skew when flexible.

Further, the driving device also comprises a motor for driving the screw rod to rotate. This optimization scheme utilizes the motor to drive the lead screw and rotates, has further improved the convenience of operation.

Preferably, the second spring is a tension spring with the lower end fixed, and the upper end of the tension spring is connected with one end, far away from the screw rod, of the lever. This optimization scheme sets up the second spring into the extension spring that is located the lever below, has realized that the second spring sets up with the homonymy of synthesizing the sliding valve, makes things convenient for the structural arrangement more.

Furthermore, the adjusting rods are two parallel adjusting rods, wherein one adjusting rod is a screw rod and is connected with a motor, and the other adjusting rod is a piston rod and is connected with a hydraulic cylinder or an air cylinder. This optimization scheme sets up two regulation poles to adjust the driving piece that its edge vertical movement of different drives of pole connection, it is more convenient to operate, has realized the compatibility of multiple form.

As optimization, the driving device comprises a feedback rod fixedly connected with the extension rod, a hinge seat fixedly arranged and a lever hinged with the hinge seat and positioned above the valve core of the comprehensive slide valve, one end of the lever is connected with the feedback rod through an electromagnetic band-type brake mechanism, the other end of the lever is connected with a spring centering device, the force of the spring centering device is greater than the elastic force of a first spring, one side of the hinge seat, which is far away from the comprehensive slide valve, is provided with an adjusting oil cylinder for driving one end of the lever, which is far away from the comprehensive slide valve, to move downwards, and the cylinder body of the adjusting oil cylinder; the first oil port of the comprehensive slide valve is communicated with the rod cavity of the servomotor, and the second oil port of the comprehensive slide valve is communicated with the rodless cavity of the servomotor. When the optimized scheme is used, the electricity of the electromagnetic band-type brake is switched on to enable the electromagnetic band-type brake mechanism and the feedback rod to be in a free state, the piston of the adjusting oil cylinder extends out, one end of the lever is driven to move downwards, the lever is lifted by overcoming the elastic force of the spring centering device at the other end, the valve core of the comprehensive slide valve moves upwards under the action of the first spring, high-pressure oil enters the rodless cavity of the servomotor, the extension rod of the servomotor moves upwards, the adjusting oil cylinder moves upwards integrally, the valve core of the comprehensive slide valve is pressed by the lever to move downwards under the action of the centering spring, the first oil port and the second oil port are sealed, the servomotor stops acting, meanwhile, the electromagnetic band-type brake mechanism is powered off, the feedback rod and the lever are locked together by the electromagnetic band-type brake, the.

Further, the spring centering device comprises an upper sleeve and a lower sleeve which are fixedly arranged, an upper ejector block and an upper pressure spring which vertically pushes the upper ejector block downwards to the upper surface of the lever are arranged in the upper sleeve, and a lower ejector block and a lower pressure spring which vertically pushes the lower ejector block upwards to the lower surface of the lever are arranged in the lower sleeve. The optimized scheme utilizes the combined action of the upper pressure spring and the lower pressure spring to keep the lever balanced, has simple structure and is convenient to move in a matching way with the adjusting oil cylinder at the other end of the lever.

As optimization, a top plate of the upper sleeve is connected with a pre-tightening screw I through threads, the lower end of the pre-tightening screw I is fixedly connected with a pre-tightening plate I, and a limiting table extending to an inner ring of the upper spring is arranged on the pre-tightening plate I; and a bottom plate of the lower sleeve is connected with a pre-tightening screw rod II through threads, the upper end of the pre-tightening screw rod II is fixedly connected with a pre-tightening plate II, and the pre-tightening plate II is provided with a limiting table extending to the inner ring of the lower spring. The setting of this optimization scheme can adjust the pretightning force of spring through rotating the pretension screw, satisfies the requirement of returning to the centre of difference.

The scheme also provides a use method of the balanced rigid feedback bidirectional self-stabilization stroke regulation protection device, the driving device is rigidly connected with the extension rod, the valve core of the comprehensive slide valve is pressed downwards by the driving device, the extension rod of the servomotor acts through the movement of the valve core, when the extension rod of the servomotor moves, the driving device is driven to move integrally away from the valve core, the valve core is driven to move upwards by the resilience force of the first spring, an oil inlet pipeline and an oil drainage pipeline of the servomotor are blocked, and the extension rod of the servomotor reaches a balanced and stable state.

The invention has the beneficial effects that: the hydraulic engine and the comprehensive slide valve can move in the same direction and can also move relatively for feedback, and the hydraulic engine and the comprehensive slide valve can be compatible with various protection and regulation modes, can be used for an oil hydraulic cylinder, a hydraulic cylinder and a pneumatic cylinder, and can also be used for a speed regulation system and a protection of a steam turbine, a control and protection system of strokes of a valve, such as opening, closing and protection, and the like.

Drawings

FIG. 1 is a schematic structural view of an embodiment;

FIG. 2 is a schematic structural diagram according to a second embodiment;

FIG. 3 is a schematic view of a third embodiment;

FIG. 4 is a diagram illustrating a fourth embodiment;

FIG. 5 is a schematic view of the engagement of a gear and a rack in the fourth embodiment;

FIG. 6 is a schematic view of an oil-filled motor according to a fourth embodiment;

FIG. 7 is a schematic structural diagram of the fifth embodiment;

FIG. 8 is a schematic diagram of a sixth embodiment;

FIG. 9 is a schematic view of the valve core and the extension bar in a vertical state;

shown in the figure:

1. the hydraulic control valve comprises a valve core, 2, a screw rod, 3, a feedback rod, 4, an extension rod, 5, a servomotor, 6, a first spring, 7, a comprehensive slide valve, 8, an electromagnetic valve, 9, a second oil port, 10, a first oil port, 11, a lever, 12, a hinged support, 13, a second spring, 14, a fixed cover, 15, an adjusting screw rod, 16, a tension spring, 17, an electric motor, 18, a hydraulic cylinder, 19, a gear, 20, a rack, 21, a movable plate, 22, a static plate, 23, an electromagnetic band-type brake mechanism, 24, a spring centering device, 25, a pre-tightening screw rod II, 26 and a down spring.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.