CN215891351U

CN215891351U - Valve position indicator with mechanical linkage type potentiometer

Info

Publication number: CN215891351U
Application number: CN202121748781.4U
Authority: CN
Inventors: 顾耀民; 陈亚军
Original assignee: HANSUN (SHANGHAI) MARINE TECHNOLOGY CO LTD
Current assignee: HANSUN (SHANGHAI) MARINE TECHNOLOGY CO LTD
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-02-22
Anticipated expiration: 2031-07-29

Abstract

The utility model relates to a valve position indicator with a mechanical linkage potentiometer, which comprises a gauge head and a gauge head base, and is arranged on a valve seat of a valve in the hydraulic valve remote control system through a gear pair linked with the opening degree of the valve, the gauge head comprises a gauge head shell with a cavity inside, an aviation socket is arranged beside the gauge head shell, the top surface of the dial is provided with a dial plate, the center of the dial plate is provided with an indicating plate and a pointer which are linked with the mechanical linkage potentiometer, the mechanical linkage potentiometer comprises a meter head shaft assembly arranged on the central axis of the meter head shell and a resistor arranged on the inner bottom surface of the meter head shell and sleeved on the periphery of the meter head shaft assembly, the resistor is electrically connected with the aviation socket, the gauge outfit base in be sequentially provided with a reduction gear box and a strong magnetic clutch which are linked with the gauge outfit shaft assembly, and the strong magnetic clutch is linked with a gear pair arranged on the valve seat. The utility model combines a gear type flowmeter to output an electric signal to indicate and control the opening degree of the valve.

Description

Valve position indicator with mechanical linkage type potentiometer

Technical Field

The utility model relates to a valve opening indicator applied to a valve remote control hydraulic system, in particular to a valve position indicator provided with a mechanical linkage type potentiometer.

Background

The potentiometer in the prior art is generally provided with an electronic control circuit and is arranged on a printed circuit board or a bracket, a resistor body of the potentiometer is provided with two fixed ends, and the position of a moving contact on the resistor body is changed by manually adjusting a rotating shaft or a sliding handle, so that the resistance value between the moving contact and any one of the fixed ends is changed, and the magnitude of the measured voltage and the measured current are changed.

In the field of electric valve control, because an on-site valve position indicator is adopted by an electric valve, the opening degree of the valve can be directly transmitted to a shaft of the valve position indicator, and then an angle signal is converted into an electric signal through a potentiometer and transmitted to a control system, so that the measurement and control of the opening degree of a load are realized. However, for a hydraulic valve remote control system, a valve position indicator needs to be installed in a solenoid valve box, after hydraulic oil flows through a gear flowmeter of the valve position indicator, a linear relation between oil quantity and valve opening is calculated by a control system and then converted into an electric signal for transmission, and a carrier similar to a potentiometer is needed. The common potentiometer on the market at present is packaged into a whole, so the potentiometer cannot be directly installed in a gauge head of a valve position indicator of a hydraulic system, cannot be directly used for measuring the opening degree of a valve in the hydraulic system, cannot be connected and transited with a gear flowmeter, cannot obtain an electric signal of the opening degree of the valve, and has great restriction on the realization of automatic control and control precision of a valve remote control system.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the valve position indicator with the mechanical linkage type potentiometer, the mechanical linkage type potentiometer which is compact in structure and convenient to install is arranged in a gauge head of the valve position indicator of the hydraulic valve remote control system, the opening value of the valve can be obtained through an electric control system after the opening value of the valve is converted into an electric signal, the indication and the control of the opening degree of the valve are realized, and the reliability and the automation degree of the hydraulic valve remote control system are improved.

The utility model is realized by the following steps: the utility model provides a valve position indicator with mechanical linkage formula potentiometre which characterized in that: the valve position indicator comprises a gauge head and a gauge head base, and is arranged on a valve seat of a valve in a hydraulic valve remote control system through a gear pair linked with the opening of the valve, the gauge head comprises a gauge head shell of which the inside is a cavity, an aviation socket is arranged beside the gauge head shell, a dial is arranged on the top surface of the gauge head shell, an indicating disc and a pointer linked with a mechanical linkage potentiometer are arranged at the center of the dial, the mechanical linkage potentiometer comprises a gauge head shaft assembly arranged on the central axis of the gauge head shell and a resistor arranged on the inner bottom surface of the gauge head shell and sleeved on the periphery of the gauge head shaft assembly, two resistance rings are sequentially printed on the resistor from the center of the circle to the outside and are electrically connected with the aviation socket, the gauge head shaft assembly comprises a gauge head input coupling block arranged at the bottom of the gauge head shaft sleeve, a friction plate arranged between the gauge head shaft sleeve and the gauge head input coupling block, and an electric brush assembly sleeved on the gauge head shaft sleeve and the periphery of the friction plate, Locate one section spring of gauge outfit axle sleeve tip and locate the screw of gauge outfit axle sleeve tip, gauge outfit base in the order be equipped with the reduction gear case and the strong magnetic clutch of linking with gauge outfit input coupling piece, strong magnetic clutch with locate the gear pair linkage on the disk seat. The electric brush assembly comprises an electric brush frame and an electric brush which are connected into a whole through a cross slot screw.

The gauge outfit casing in the bottom be equipped with ring form recess, and the center is equipped with the through-hole that is used for installing gauge outfit axle assembly, the top surface of gauge outfit casing be fixed in on the gauge outfit casing through the table lid of through-hole formula the surperficial organic glass that will be equipped with circular recess, the dial plate is inlayed in the circular recess on surperficial organic glass.

The resistor is a circular thin sheet and is arranged in a circular groove on the inner bottom surface of the meter head shell, a resistor inner ring and a resistor outer ring are printed in sequence from the circle center to the outside, the resistor outer ring is provided with an opening, and the opening is provided with a connection extension section connected with the resistor inner ring.

The valve position indicator transmits the flow value of the hydraulic oil through a gear pair, a strong magnetic clutch and a reduction gear box in sequence, the flow value is input to a coupling block to an indicating disc and a pointer through a gauge head in the gauge head to realize reading display, and the flow value is converted into a resistance value which is output to a control circuit through a resistor and an electric brush.

The utility model is installed on the valve base, and the gear type flowmeter used for measuring the oil mass flowing through the valve driver is installed on the integrated valve block, and is subjected to speed reduction processing by a speed reduction gear box through a certain speed ratio, and the opening value of the valve is converted into a resistance value through the matching of a resistor and an electric brush, and is converted into an electric signal of 4-20mA through a control circuit, and the opening value of the valve is obtained by an electric control system, so that the indication and the control of the opening of the valve are realized, and the reliability and the automation degree of a valve remote control system are improved.

The utility model has the beneficial effects that: the utility model has compact structure and convenient installation, can be used for measuring and indicating the opening of the valve in the hydraulic valve remote control system, and is converted into an automatic electric signal which is convenient to control, thereby realizing the accurate measurement and control of the opening of the load such as the valve, solving the difficult problems of automatic measurement and control of the operation state of the opening type valve and improving the reliability and the automation degree of the hydraulic valve remote control system.

Drawings

Fig. 1 is a schematic view of the appearance of the dial side of the watch head according to the present invention.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic sectional view along line B-B of fig. 2.

Fig. 4 is a schematic structural view of the head shaft assembly of the present invention.

Fig. 5 is a schematic sectional view along line C-C of fig. 4.

Fig. 6 is a schematic diagram of the structure of the resistor in the present invention.

Fig. 7 is a schematic view showing the overall structure of the valve position indicator of the present invention.

Fig. 8 is a sectional view taken along line D-D of fig. 7.

Fig. 9 is a schematic diagram of the principle of valve control and opening measurement implemented by the present invention.

In the figure: 1. a gauge head case; 2. a resistor; 3. A gauge head shaft assembly; 4. a watch cover; 5. organic glass on the surface; 6. a dial plate; 7. an aviation socket; 8. an indicator panel; 9. a pointer;

11. the gauge outfit inputs the coupling block; 12. a friction plate; 13. an electric brush holder; 14. a gauge head shaft sleeve; 15. a spring; 16. a screw; 17. an electric brush;

21. an inner ring of resistors; 22. a resistor outer ring;

31. a valve seat; 32. a gear pair; 33. a gauge head base; 34. a gauge head; 35. a strong magnetic clutch; 36. a reduction gear box;

41. a valve; 42. a hydraulic drive; 43. a valve position indicator; 44. an electromagnetic valve.

Detailed Description

The utility model is described in further detail below with reference to the figures and specific examples.

According to the attached drawings 1-9, the utility model relates to a valve position indicator with a mechanical linkage potentiometer, which comprises a gauge head 34 and a gauge head base 33, and is arranged on a valve seat of a valve in a hydraulic valve remote control system through a gear pair 32 capable of linking with the opening degree of the valve.

The gauge head 34 comprises a gauge head shell 1 with a cavity inside, an aviation socket 7 is arranged beside the gauge head shell 1, surface organic glass 5 with a circular groove is fixed on the gauge head shell 1 through a through hole type gauge cover 4 on the top surface of the gauge head shell, a gauge plate 6 is embedded in the circular groove on the surface organic glass 5, and an indicating disc 8 and a pointer 9 which are linked with a mechanical linkage type potentiometer are arranged in the center of the gauge plate 6.

The mechanical linkage potentiometer comprises a meter head shaft assembly 3 arranged on the central axis of the meter head shell 1 and a resistor 2 arranged on the inner bottom surface of the meter head shell 1 and sleeved on the periphery of the meter head shaft assembly 3 in a sleeving manner. The gauge head shell 1 is provided with a circular groove on the inner bottom surface, and a through hole for installing the gauge head shaft assembly 3 is arranged in the center. The resistor 2 is a circular thin sheet and is arranged in a circular groove on the inner bottom surface of the gauge outfit shell 1, two resistor rings are printed from the center of a circle to the outside in sequence and are respectively an inner resistor ring 21 and an outer resistor ring 22, the outer resistor ring 22 is provided with an opening, the opening is provided with a connection extension section connected with the inner resistor ring 21, and the resistor 2 is electrically connected with the aviation socket 7. The gauge head shaft assembly 3 comprises a gauge head input coupling block 11 arranged at the bottom of the gauge head shaft sleeve 14, a friction plate 12 arranged between the gauge head shaft sleeve 14 and the gauge head input coupling block 11, a brush assembly sleeved on the peripheries of the gauge head shaft sleeve 14 and the friction plate 12, a spring 15 arranged at one section of the end part of the gauge head shaft sleeve 14, and a screw 16 arranged at the end part of the gauge head shaft sleeve 14. The meter head shaft assembly 3 and the resistor 2 are core parts of the mechanical linkage type potentiometer. The brush assembly comprises a brush holder 13 and a brush 17 which are connected into a whole through a cross-slot screw.

The meter head base 33 is internally sequentially provided with a reduction gear box 36 and a strong magnetic clutch 35 which are linked with the meter head input coupling block, the strong magnetic clutch 35 is linked with a gear pair 32 arranged on a valve seat 31, the flow value of the passing hydraulic oil is reduced by the reduction gear box 36 and then sent to the meter head input coupling block 11 in the meter head 34, the indication disc 8 and the pointer 9 display the reading, and the resistance value is combined with a gear type flowmeter to output the resistance value, and the resistance value is converted into an electric signal of 4-20mA by PLC and is calculated into a corresponding valve opening to indicate the opening value of the valve. Before the operation of the valve, a command for the valve opening is given, the electromagnetic directional valve 44 is opened, the hydraulic oil flows through the valve driver 42, the valve 41 is opened, and the hydraulic oil flows back to the oil tank through the valve position indicator 43. When the hydraulic oil flows through the valve position indicator 43, the gear pair 32 plays a role in metering the hydraulic oil, the resistance value corresponding to the opening degree is obtained through the strong magnetic clutch 35 and the reduction gear box 36 and then through the electric brush 17, the resistor inner 21 and the resistor outer ring 22 in the gauge head 34 inner head shaft assembly 3, the resistance value is calculated to be 4-20mA current value, the value is compared with the current value corresponding to the designed opening degree, and when the opening degree value is reached, the electromagnetic directional valve 44 automatically cuts off the power to close the hydraulic oil loop. The working principle of valve closing control is the same as that of valve opening control.

The working principle and the working process of the utility model are as follows:

for the hydraulic opening adjusting type valve 41, an opening value is given, the electromagnetic valve 44 is opened through a control system, hydraulic oil flows into the valve seat 31 through a P port of the electromagnetic valve 44, then flows through the gear pair 32, flows back to the valve seat 31, then is sent to an oil inlet of a hydraulic driver 42 of the load valve 41, drives the valve 41, and then flows back to a T port of the electromagnetic valve 44, the valve seat 31 and an oil tank of a hydraulic station from an oil return port of the driver 42.

When the hydraulic oil flows through the gear pair 32, a pair of gears is driven to operate, the operating speed and the rotating speed are in a certain proportional relation with the oil amount flowing into the driver 42, the rotating speed of the gear pair 32 is in a fixed proportion with the opening degree of the valve 41, and the opening degree of the valve is directly reflected.

A valve switches from one state to another, open or closed, or stays in any position, and gear pair 32 typically rotates to 10-200 revolutions, depending on the size of valve 41 and actuator 42. Since the gear pair 32 is required to have high accuracy and high manufacturing cost, only the gear pair 32 of the same specification is used for valves 41 of different specifications. The reduction gear box 36 that mechanically transmits the gear pair 32 in the hydraulic oil circuit to the inside of the gauge head base 33 employs a strong magnetic clutch 35. The reduction gear box 36 with a proper speed ratio is selected, so that the rotation angle of the output shaft of the reduction gear box 36 is within the range of 120 degrees and 240 degrees in one working stroke. The output shaft of the reduction gear box 36 is linked with the meter head input coupling block 11, on one hand, the opening degree of the valve 41 is sent to an indicating mechanism consisting of the dial 6, the indicating disc 8 and the pointer 9 through a transmission mechanism consisting of the friction plate 12, the electric brush frame 13, the meter head shaft sleeve 14, the spring 15 and the screw 16, and the current operation and opening degree state of the valve are visually indicated. On the other hand, the current value of the resistance is sent to a control circuit through the resistor 2, the electric brush 17, the electric brush frame 13 and the aviation socket 7 and then converted into an electric signal of 4-20mA, and the current value is controlled by the existing computer program and can be displayed and controlled through a human-computer interface, so that the automation level of remote control of the valve is improved.

Claims

1. The utility model provides a valve position indicator with mechanical linkage formula potentiometre which characterized in that: the valve position indicator comprises a gauge head and a gauge head base, and is arranged on a valve seat of a valve in a hydraulic valve remote control system through a gear pair linked with the opening of the valve, the gauge head comprises a gauge head shell of which the inside is a cavity, an aviation socket is arranged beside the gauge head shell, a dial is arranged on the top surface of the gauge head shell, an indicating disc and a pointer linked with a mechanical linkage potentiometer are arranged at the center of the dial, the mechanical linkage potentiometer comprises a gauge head shaft assembly arranged on the central axis of the gauge head shell and a resistor arranged on the inner bottom surface of the gauge head shell and sleeved on the periphery of the gauge head shaft assembly, two resistance rings are sequentially printed on the resistor from the center of the circle to the outside and are electrically connected with the aviation socket, the gauge head shaft assembly comprises a gauge head input coupling block arranged at the bottom of the gauge head shaft sleeve, a friction plate arranged between the gauge head shaft sleeve and the gauge head input coupling block, and an electric brush assembly sleeved on the gauge head shaft sleeve and the periphery of the friction plate, Locate one section spring of gauge outfit axle sleeve tip and locate the screw of gauge outfit axle sleeve tip, gauge outfit base in the order be equipped with the reduction gear case and the strong magnetic clutch of linking with gauge outfit input coupling piece, strong magnetic clutch with locate the gear pair linkage on the disk seat.

2. The valve position indicator with the mechanical linkage type potentiometer as claimed in claim 1, characterized in that: the gauge outfit casing in the bottom be equipped with ring form recess, and the center is equipped with the through-hole that is used for installing gauge outfit axle assembly, the top surface of gauge outfit casing be fixed in on the gauge outfit casing through the table lid of through-hole formula the surperficial organic glass that will be equipped with circular recess, the dial plate is inlayed in the circular recess on surperficial organic glass.

3. The valve position indicator with the mechanical linkage type potentiometer as claimed in claim 1, characterized in that: the resistor is a circular thin sheet and is arranged in a circular groove on the inner bottom surface of the meter head shell, a resistor inner ring and a resistor outer ring are printed in sequence from the circle center to the outside, the resistor outer ring is provided with an opening, and the opening is provided with a connection extension section connected with the resistor inner ring.

4. The valve position indicator with the mechanical linkage type potentiometer as claimed in claim 1, characterized in that: the electric brush assembly comprises an electric brush frame and an electric brush which are connected into a whole through a cross slot screw.

5. The valve position indicator with the mechanical linkage type potentiometer as claimed in claim 1, characterized in that: the valve position indicator transmits the flow value of the hydraulic oil through a gear pair, a strong magnetic clutch and a reduction gear box in sequence, the flow value is input to a coupling block to an indicating disc and a pointer through a gauge head in the gauge head to realize reading display, and the flow value is converted into a resistance value which is output to a control circuit through a resistor and an electric brush.