Electric valve opening degree detection device

Abstract

The utility model discloses an electric valve opening degree detection device, which relates to the technical field of electric valve detection, and comprises an electric valve main body, an opening degree detection device, a mounting seat and an electric actuator, the opening degree detection device comprises a magnetostrictive displacement sensor, a mechanical transmission module, a display module and a signal processing module. According to the utility model, through the cooperation of the worm and gear mechanism and the gear rack mechanism, the rapid rotation motion of the valve is converted into the low-speed linear displacement of the rack, and the opening degree of the valve can be accurately measured. Meanwhile, the rack slides in a guide groove of the mechanical transmission module, it is ensured that linear motion does not deviate, and the measurement precision is further improved. The magnetostriction displacement sensor detects the displacement amount of the rack in real time, the actual opening degree of the valve can be accurately reflected, the signal processing module converts displacement electric signals into the percentage of the opening degree of the valve through an algorithm, and measurement is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric valve detection technical field, concretely relates to a kind of electric valve opening detection device. BACKGROUND

[0002] In the field of industrial automation control, as the key execution element in fluid pipeline system, the accurate detection of the opening of electric valve directly affects the accuracy of flow regulation and the stability of system operation. At present, the opening detection of electric valve relies on devices such as rotary encoder, potentiometer or traditional displacement sensor, and the valve opening is indirectly calculated by directly measuring the rotation angle of valve rod or valve shaft. However, such technology has the following defects in practical application:

[0003] Insufficient transmission accuracy: the rotation speed of valve drive shaft is fast, and the reduction ratio of traditional transmission mechanism (such as spur gear or connecting rod) is limited, which is difficult to amplify the small rotation angle into detectable linear displacement, resulting in low measurement resolution, especially in small opening regulation.

[0004] Complex mechanical structure: in order to realize the conversion of rotary-linear motion, multi-stage gear or lever mechanism is often used in the prior art, resulting in long transmission chain and large volume, and measurement drift is easy to occur due to mechanical clearance or wear.

[0005] Maintenance is not convenient: the sensor and transmission component are connected in a fixed way, and the whole device needs to be disassembled when replacing or calibrating, which is complicated and easy to damage the original calibration parameters, increasing the cost of downtime maintenance.

[0006] Poor environmental adaptability: contact sensor (such as potentiometer) is easy to wear or signal distortion under high temperature, high humidity or vibration working condition, affecting long-term reliability.

[0007] In view of the above problems, a high-precision, high-reliability and easy-to-maintain electric valve opening detection device is needed to improve the intelligent level of industrial valve control. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a kind of electric valve opening detection device to solve the problems raised in the above background technology.

[0009] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0010] A kind of electric valve opening detection device, including electric valve main body, opening detection device, mounting seat and electric actuator, the opening detection device is located at the top of electric actuator, the opening detection device includes magnetostrictive displacement sensor, mechanical transmission module, display module and signal processing module;

[0011] The mechanical transmission module comprises a worm, a turbine, a gear and a rack, is used for converting valve rotary motion into linear displacement, and the bottom end of the worm is fixedly connected with a valve driving shaft through a shaft coupling;

[0012] One end of the magnetostrictive displacement sensor is fixedly connected with a sensor measuring rod, and one end of the sensor measuring rod is fixedly connected with one end of the rack through a threaded sleeve in a detachable manner.

[0013] The signal processing module converts the displacement signal into an opening percentage and drives the display module.

[0014] Further improvement of the technical scheme of the utility model lies in that the outer wall of the worm is engaged with the turbine, the turbine rotates coaxially with the gear, and the bottom surface of the gear is engaged with the rack.

[0015] Further improvement of the technical scheme of the utility model lies in that the mechanical transmission module is located inside the mounting seat, and the turbine is rotationally connected to the inner wall of the mechanical transmission module.

[0016] Further improvement of the technical scheme of the utility model lies in that the inner wall of the mechanical transmission module is provided with a guide groove, and the rack is slidingly connected to the inner wall of the guide groove.

[0017] Further improvement of the technical scheme of the utility model lies in that the mounting seat is fixedly connected to the top of the electric actuator through mounting bolts.

[0018] Further improvement of the technical scheme of the utility model lies in that the total reduction ratio of the mechanical transmission module is 1:60-1:100.

[0019] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0020] 1、The utility model provides a kind of electric valve opening detection device, is realized larger reduction ratio (1:60-1:100) by the cooperation of worm gear mechanism and gear rack mechanism, the fast rotary motion of valve is converted into the low-speed linear displacement of rack, can accurately measure the opening of valve.Simultaneously, rack slides in the guide groove of mechanical transmission module, ensure that linear motion is not offset, further improve measurement accuracy.Magnetostrictive displacement sensor detects rack displacement amount in real time, can accurately reflect the actual opening of valve, and signal processing module is converted into the percentage of valve opening by algorithm again displacement electric signal, so that measurement is more accurate.

[0021] 2, the utility model provides a kind of electric valve opening degree detection device, mounting seat is fixed in electric actuator top by mounting bolt, the synchronism and stability of guaranteeing overall device and valve drive.In addition, sensor measuring rod and rack are connected by detachable threaded sleeve, it is convenient to disassemble and maintain magnetostrictive displacement sensor, when needing to replace or overhaul sensor, it is more convenient to operate, it is favorable to improve the maintenance efficiency of equipment, reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structural schematic diagram of the utility model;

[0023] Figure 2 It is the overhead structure detail schematic diagram of the opening degree detection device of the utility model;

[0024] Figure 3 It is the structural schematic diagram of the opening degree detection device of the utility model;

[0025] Figure 4 It is the enlarged schematic diagram of structure A of the utility model.

[0026] In the drawing: 1, electric valve main body;2, opening degree detection device;3, mounting seat;4, magnetostrictive displacement sensor;5, mechanical transmission module;6, display module;7, signal processing module;8, guide slot;9, worm;10, turbine;11, gear;12, rack;13, sensor measuring rod;14, threaded sleeve;15, mounting bolt;16, valve drive shaft;18, electric actuator. DETAILED DESCRIPTION

[0027] In the description of the utility model, it also needs to be explained that, unless another explicit provision and limitation, term "arrange" "install" "connect" "connection" should be broad-sense understanding, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;It can be directly connected, can be indirectly connected through intermediate medium, can be the intercommunication of two elements inside.For ordinary skilled in the art, the specific meaning of above-mentioned term in the utility model can be understood according to specific circumstances.

[0028] The utility model is further explained in detail as follows by combining with embodiment:

[0029] Embodiment 1

[0030] As Figures 1-4The utility model provides an electric valve opening degree detection device, including electric valve main body 1, opening degree detection device 2, mounting seat 3 and electric actuator 18, opening degree detection device 2 is located at the top of electric actuator 18, opening degree detection device 2 includes magnetostrictive displacement sensor 4, mechanical transmission module 5, display module 6 and signal processing module 7,

[0031] Mechanical transmission module 5 includes worm 9, turbine 10, gear 11 and rack 12, and the mechanical transmission module 5 is used to convert the valve rotary motion into linear displacement, and the bottom end of the worm 9 is fixedly connected with the valve driving shaft 16 through the shaft coupling.

[0032] One end of the magnetostrictive displacement sensor 4 is fixedly connected with the sensor measuring rod 13, and one end of the sensor measuring rod 13 is fixedly connected with one end of the rack 12 through the threaded sleeve 14.

[0033] The signal processing module 7 converts the displacement signal into an opening percentage and drives the display module 6.

[0034] The outer wall of the worm 9 is engaged with the turbine 10, the turbine 10 rotates coaxially with the gear 11, and the bottom surface of the gear 11 is engaged with the rack 12.

[0035] Embodiment 2

[0036] As Figures 1-4 As shown in the embodiment 1, the utility model provides a technical scheme: preferably, the mechanical transmission module 5 is located in the inside of the mounting seat 3, and the turbine 10 is rotationally connected to the inner wall of the mechanical transmission module 5.

[0037] The inner wall of the mechanical transmission module 5 is provided with a guide groove 8, and the rack 12 is slidingly connected to the inner wall of the guide groove 8.

[0038] The mounting seat 3 is fixedly connected to the top of the electric actuator 18 through the mounting bolt 15.

[0039] The total reduction ratio of the mechanical transmission module 5 is 1:60-1:100.

[0040] The working principle of the electric valve opening degree detection device will be described in detail below.

[0041] As Figures 1-4 As shown, the electric actuator 18 drives the valve driving shaft 16 to rotate, and the rotary motion is transmitted to the worm 9 through the shaft coupling. The worm 9 is engaged with the turbine 10, and the high reduction ratio 1:60-1:100 of the worm and gear mechanism is used to convert the rapid rotation into low-speed rotation of the turbine 10, while increasing the torque. The turbine 10 rotates coaxially with the gear 11, and the gear 11 is engaged with the rack 12, which further converts the rotary motion of the turbine 10 into precise linear displacement of the rack 12.

[0042] The linear motion of the rack 12 is transmitted to the sensor measuring rod 13 through the detachable threaded sleeve 14, driving the magnetic marker inside the magnetostrictive displacement sensor 4 to move. The magnetostrictive sensor generates an electrical signal based on the change in the magnetic field, detecting the displacement of the rack 12 in real time, reflecting the actual opening of the valve.

[0043] The signal processing module 7 receives the displacement electrical signal of the sensor, converts it into the percentage of the valve opening 0%-100% through an algorithm, corresponding to the full-closed to full-open state of the valve. The processed opening data drives the display module 6, intuitively showing the current valve position, facilitating monitoring and debugging. The rack 12 slides in the guide groove 8 of the mechanical transmission module 5, ensuring that the linear motion is not offset, improving the measurement accuracy. The mounting seat 3 is fixed to the top of the electric actuator 18 through the mounting bolt 15, ensuring the synchronization and stability of the overall device and the valve drive.

[0044] It should be noted that in this paper. Moreover, the term "comprising" "including" or any other variant means to cover the non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the existence of other identical elements in the process, method, article or equipment including the element. The above generally describes the utility model in detail, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modification or improvement without departing from the spirit of the utility model is within the protection scope of the utility model.

Claims

1. An electric valve opening degree detecting device comprising an electric valve body (1), an opening degree detecting device (2), a mounting seat (3) and an electric actuator (18), characterized in that: The opening degree detection device (2) is located at the top of the electric actuator (18), the opening degree detection device (2) comprises a magnetostrictive displacement sensor (4), a mechanical transmission module (5), a display module (6) and a signal processing module (7); The mechanical transmission module (5) comprises a worm (9), a turbine (10), a gear (11) and a rack (12), the mechanical transmission module (5) is used for converting valve rotary motion into linear displacement, the bottom end of the worm (9) is fixedly connected with a valve driving shaft (16) through a shaft coupling; One end of the magnetostrictive displacement sensor (4) is fixedly connected with a sensor measuring rod (13), one end of the sensor measuring rod (13) is fixedly connected with one end of the rack (12) through a threaded sleeve (14); The signal processing module (7) converts the displacement signal into an opening degree percentage and drives the display module (6).

2. The electric valve opening degree detection device according to claim 1, characterized by: The outer wall of the worm (9) is engaged with the turbine (10), the turbine (10) rotates coaxially with the gear (11), and the bottom surface of the gear (11) is engaged with the rack (12).

3. The electric valve opening degree detecting device according to claim 1, wherein: The mechanical transmission module (5) is located in the inside of the mounting seat (3), and the turbine (10) is rotationally connected to the inner wall of the mechanical transmission module (5).

4. The electric valve opening degree detection device according to claim 1, characterized by: The inner wall of the mechanical transmission module (5) is provided with a guide groove (8), and the rack (12) is slidingly connected to the inner wall of the guide groove (8).

5. The electric valve opening degree detecting device according to claim 1, characterized by: The mounting seat (3) is fixedly connected to the top of the electric actuator (18) through mounting bolts (15).

6. The electric valve opening degree detection device according to claim 1, characterized by: The total reduction ratio of the mechanical transmission module (5) is 1:60-1:100.

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