Metering device for measuring anti-bending displacement of insulating arm and use method thereof
The metering device designed by linking the hydraulic cylinder piston rod and the contact wheel, combined with an encoder and an intelligent control module, solves the problems of low accuracy and low frequency in the measurement of the bending displacement of the insulating arm, realizes high-precision real-time monitoring, reduces human errors and power consumption, and improves equipment safety.
Patent Information
- Application Number
- CN202510843098.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-23
- Publication Date
- 2025-09-19
AI Technical Summary
In the prior art, the measurement of the bending displacement of the insulating arm has the problems of low measurement accuracy, low frequency, complex operation, and susceptibility to environmental factors.
A metering device that links the hydraulic cylinder piston rod with the contact wheel, combined with an encoder and an intelligent control module, can realize real-time displacement monitoring of the insulating arm. The movement of the hydraulic cylinder piston rod drives the contact wheel to rotate, and the encoder captures the displacement data in real time and uploads it via wireless communication.
It achieves high-precision real-time monitoring of the bending displacement of the insulation arm, eliminates manual reading errors, improves measurement frequency and stability, reduces power consumption and maintenance costs, and promptly detects potential structural problems.
Smart Images
Figure CN120668032A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of performance testing of insulating materials, and relates to a metering device for measuring the bending displacement of an insulating arm and a use method thereof. Background Art
[0002] Insulation arms are common structural components in the power industry, widely used in transmission lines, high-voltage switchgear, and other facilities. Their primary function is to provide electrical insulation while also bearing mechanical loads. Over long-term operation, these arms may experience displacement changes due to mechanical stress, environmental factors (such as temperature differences and humidity), or material aging, affecting their structural stability and even causing equipment failure. Therefore, measuring the bending displacement changes of the insulation arms is crucial to ensuring the safe operation of the equipment. Safely and promptly monitoring the displacement changes of the insulation arms at the test site can prevent equipment failures and safety incidents caused by structural instability. Accurate displacement monitoring data facilitates the development of scientifically sound maintenance plans, reduces unnecessary maintenance costs, and extends equipment life. Long-term monitoring allows the actual performance of the insulation arms to be evaluated, potential problems to be promptly identified, and guidance for the proper use and configuration of the equipment.
[0003] Traditional measurement methods rely primarily on manual inspections, such as using tape measures and laser rangefinders. These methods suffer from limitations such as low accuracy, low frequency, complex operation, and susceptibility to environmental factors. While portable measurement tools can improve accuracy to a certain extent, they still cannot achieve real-time monitoring and timely data processing. Summary of the Invention
[0004] The purpose of the present invention is to solve the technical problems of low measurement accuracy, low frequency, complex operation and susceptibility to environmental factors in the existing technology of measuring the bending displacement of insulating arms, and to provide a measuring device for measuring the bending displacement of insulating arms and a method for using the same.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a metering device for measuring the bending displacement of an insulating arm, comprising a hydraulic cylinder body and a hydraulic cylinder piston rod; the hydraulic cylinder body is connected to an encoder housing via a bracket; a rotating shaft is provided axially of the encoder housing, and a contact wheel is provided at the other end of the rotating shaft, the contact wheel contacts the hydraulic cylinder piston rod, and when the hydraulic cylinder piston rod moves up and down, the contact wheel is driven to rotate; an encoder for measuring the rotation angle of the contact wheel is provided in the encoder housing; During operation, the free end of the piston rod of the hydraulic cylinder is connected to one end of the insulating arm; and the cylinder body of the hydraulic cylinder is fixed on a fixed point.
[0006] Further improvements are: The bracket includes a third bracket fixed around the circumference of the hydraulic cylinder body, a fixing plate is provided on the third bracket, a second bracket is provided on the fixing plate, the second bracket is connected to the first bracket through a fixing pin, and the first bracket is movably connected to the rotating shaft of the encoder housing.
[0007] The bracket is a rigid structure, and the bracket is connected to the hydraulic cylinder body through a connecting piece.
[0008] An anti-slip component is provided on the contact surface between the contact wheel and the hydraulic cylinder piston rod; and the contact pressure between the contact wheel and the hydraulic cylinder piston rod is 10-50N.
[0009] The hydraulic cylinder body is provided with a proportional servo valve, and the control accuracy of the movement speed of the hydraulic cylinder piston rod is ±0.1mm / s.
[0010] The encoder is an absolute photoelectric encoder, and the output signal includes a pulse direction signal and a zero position reference signal.
[0011] The hydraulic cylinder body is provided with an intelligent control module supporting wireless communication, which is used to remotely receive test instructions and upload test data.
[0012] The encoder and the intelligent control module are both connected to a data processing unit for performing noise filtering and smoothing processing on the test data and the displacement data measured by the encoder.
[0013] A shock-absorbing pad is provided between the encoder housing and the bracket.
[0014] In a second aspect, the present invention discloses a method for using the above-mentioned measuring device for measuring the bending displacement of an insulating arm, comprising: Step 1: A first sleeve is fixedly installed at a fixed point, wherein the first sleeve forms a certain angle with the ground; one end of an insulating arm for bending displacement measurement is fixed in the first sleeve, and a second sleeve is installed at the other end of the insulating arm, wherein a connecting hole is provided on the second sleeve; Step 2: Fix the free end of the hydraulic cylinder piston rod to the connecting hole through a connecting piece; Step 3: Start the hydraulic cylinder. The length of the hydraulic cylinder piston rod extending out of the hydraulic cylinder body begins to shorten under the push of the hydraulic oil, causing the angle between the insulating arm and the ground to decrease, resulting in flexible deformation. Step 4: When the force acting on the insulating arm reaches the test requirement, the hydraulic cylinder body is closed, the hydraulic cylinder piston rod stops moving, and the displacement reading measured by the encoder is read.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a metering device for measuring the bending displacement of an insulating arm. Through the mechanical linkage design of the hydraulic cylinder piston rod and the contact wheel, the slight deformation of the insulating arm is directly converted into the rotation angle measurement of the encoder, eliminating the subjective error of manual reading. The rigid connection structure in which the encoder housing and the hydraulic cylinder body are connected by a bracket ensures the stability of the measurement benchmark and avoids the cumulative error caused by benchmark drift in traditional measurements. The encoder supports a sampling frequency of up to 1kHz and can capture the transient process of the insulating arm deformation, while manual measurement can only obtain discrete data points. The present invention realizes the use of technical means such as real-time metrological monitoring at the test site to replace manual measurement and eliminate human measurement errors. The low-power design extends the battery life of the equipment, reduces power consumption and maintenance costs. Potential structural problems can be discovered in a timely manner to avoid major failures caused by breakage or damage of the insulating arm, thereby reducing maintenance and replacement costs.
[0016] The present invention discloses a method for using a metering device for measuring the bending displacement of an insulating arm. By fixing the first sleeve with a preset angle, rapid calibration of the installation angle of the insulating arm is achieved, shortening the preparation time compared to the traditional free placement method. The standardized design of the connecting piece and the connecting hole of the second sleeve supports the rapid completion of the mechanical docking of the device and the insulating arm. The closed-loop control of the hydraulic cylinder piston rod stabilizes the force loading rate at 0.5-5mm / s, eliminating the measurement deviation caused by manual force fluctuations and achieving high repeatability accuracy. The encoder captures displacement data in real time, records the critical point of deformation in advance compared to the traditional post-measurement method, and captures the initiation stage of tiny cracks that are difficult to observe manually. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 It is a front view of a measuring device for measuring the bending displacement of an insulating arm in the present invention; Figure 2 A side view of a measuring device for measuring the bending displacement of an insulating arm according to the present invention; Figure 3 The figure is a three-dimensional diagram of a measuring device for measuring the bending displacement of an insulating arm in the present invention.
[0019] Among them: 1-contact wheel; 2-encoder housing; 3-hydraulic cylinder piston rod; 4-hydraulic cylinder body; 5-first mounting bracket; 6-second mounting bracket; 7-third mounting bracket; 8-hydraulic cylinder oil port. DETAILED DESCRIPTION
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.
[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0023] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0026] The present invention is described in further detail below with reference to the accompanying drawings: Example 1 See also Figure 1 、 Figure 2 and Figure 3 , an embodiment of the present invention discloses a metering device for measuring the bending displacement of an insulating arm, comprising a hydraulic cylinder body 4 and a hydraulic cylinder piston rod 3, wherein the hydraulic cylinder body 4 is provided with a proportional servo valve, and the control accuracy of the movement speed of the hydraulic cylinder piston rod 3 is ±0.1mm / s; the hydraulic cylinder body 4 is connected to an encoder housing 2 through a bracket, and a shock-absorbing pad is provided between the encoder housing 2 and the bracket; the bracket is a rigid structure, and the bracket is connected to the hydraulic cylinder body 4 through a connecting piece; a rotating shaft is provided in the axial direction of the encoder housing 2, and a contact wheel 1 is provided at the other end of the rotating shaft, and the contact wheel 1 is in contact with the hydraulic cylinder piston rod 3, and the hydraulic cylinder piston rod 3 drives the contact wheel 1 to rotate when it moves up and down; an anti-slip component is provided on the contact surface between the contact wheel 1 and the hydraulic cylinder piston rod 3; the contact pressure between the contact wheel 1 and the hydraulic cylinder piston rod 3 is 10-50N. The encoder housing 2 houses an encoder for measuring the rotational angle of the contact wheel 1. This encoder is an absolute photoelectric encoder, and its output signals include a pulse direction signal and a zero-position reference signal. During operation, the free end of the hydraulic cylinder piston rod 3 is connected to one end of the insulating arm. The hydraulic cylinder body 4 is fixed to a fixed point. The hydraulic cylinder body 4 is equipped with an intelligent control module that supports wireless communication, which is used to remotely receive test instructions and upload test data. The encoder and intelligent control module are both connected to a data processing unit for noise filtering and smoothing the test data and the displacement data measured by the encoder.
[0027] The present invention discloses a metering device for measuring the bending displacement of an insulating arm. Through the mechanical linkage design of the hydraulic cylinder piston rod and the contact wheel, the slight deformation of the insulating arm is directly converted into the rotation angle measurement of the encoder, eliminating the subjective error of manual reading. The rigid connection structure in which the encoder housing and the hydraulic cylinder body are connected by a bracket ensures the stability of the measurement benchmark and avoids the cumulative error caused by benchmark drift in traditional measurements. The encoder supports a sampling frequency of up to 1kHz and can capture the transient process of the insulating arm deformation, while manual measurement can only obtain discrete data points. The present invention realizes the use of technical means such as real-time metrological monitoring at the test site to replace manual measurement and eliminate human measurement errors. The low-power design extends the battery life of the equipment, reduces power consumption and maintenance costs. Potential structural problems can be discovered in a timely manner to avoid major failures caused by breakage or damage of the insulating arm, thereby reducing maintenance and replacement costs.
[0028] Example 2 The difference between this embodiment and embodiment 1 is that the bracket includes a third bracket 7 fixed circumferentially around the hydraulic cylinder body 4, the third bracket 7 is provided with a fixing plate, the fixing plate is provided with a second bracket 6, the second bracket 6 is connected to the first bracket 5 through a fixing pin, and the first bracket 5 is movably connected to the rotating shaft of the encoder housing 2.
[0029] The embodiment of the present invention further discloses a method for using a metering device for measuring the bending displacement of an insulating arm, comprising: Step 1: A first sleeve is fixedly installed at a fixed point, wherein the first sleeve forms a certain angle with the ground; one end of an insulating arm for bending displacement measurement is fixed in the first sleeve, and a second sleeve is installed at the other end of the insulating arm, wherein a connecting hole is provided on the second sleeve; Step 2: Fix the free end of the hydraulic cylinder piston rod 3 to the connecting hole through a connecting piece; Step 3: Start the hydraulic cylinder body 4. The length of the hydraulic cylinder piston rod 3 extending out of the hydraulic cylinder body 4 begins to shorten under the push of the hydraulic oil, so that the angle between the insulating arm and the ground tends to become smaller, resulting in flexible deformation. Step 4: When the force acting on the insulating arm reaches the test requirement, the hydraulic cylinder body 4 is closed, the hydraulic cylinder piston rod 3 stops moving, and the displacement reading measured by the encoder is read.
[0030] The present invention discloses a method for using a metering device for measuring the bending displacement of an insulating arm. By fixing the first sleeve with a preset angle, rapid calibration of the installation angle of the insulating arm is achieved, shortening the preparation time compared to the traditional free placement method. The standardized design of the connecting piece and the connecting hole of the second sleeve supports the rapid completion of the mechanical docking of the device and the insulating arm. The closed-loop control of the hydraulic cylinder piston rod stabilizes the force loading rate at 0.5-5mm / s, eliminating the measurement deviation caused by manual force fluctuations and achieving high repeatability accuracy. The encoder captures displacement data in real time, records the critical point of deformation in advance compared to the traditional post-measurement method, and captures the initiation stage of tiny cracks that are difficult to observe manually.
[0031] The working process of the present invention is as follows: Installation method: The encoder housing 2 is connected to the hydraulic cylinder body 4 through a bracket. The contact wheel 1 is installed on the rotating shaft of the encoder housing 2 and rotates around the encoder housing 2. The hydraulic cylinder piston rod 3 moves up and down along the center of the hydraulic cylinder body 4.
[0032] Working Principle: The hydraulic cylinder piston rod 3 moves upward (or downward) under the propulsion of hydraulic oil, and this movement causes the contact wheel 1 to rotate. The contact wheel 1 rotates the shaft of the encoder housing 2. The encoder installed inside the encoder housing 2 accurately captures the rotational speed and uses this to calculate the distance the hydraulic cylinder piston rod 3 has moved relative to the hydraulic cylinder body 4. The free end of the hydraulic cylinder piston rod 3 is connected to one end of an insulating arm, the other end of which is fixed to the ground at a certain angle. The distance the hydraulic cylinder piston rod 3 has moved relative to the hydraulic cylinder body 4 is measured by measuring the distance the hydraulic cylinder piston rod 3 has moved relative to the hydraulic cylinder body 4. When the required pressure is reached (for example, 80% of the design value), the pressure stops immediately. The scale on the hydraulic cylinder or the control screen indicates how many millimeters the insulating arm has been bent. This data can determine whether the performance of the insulating arm meets the operating requirements.
[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A measuring device for measuring the bending displacement of an insulating arm, characterized in that: The invention comprises a hydraulic cylinder body (4) and a hydraulic cylinder piston rod (3); the hydraulic cylinder body (4) is connected to an encoder housing (2) via a bracket; a rotating shaft is provided in the axial direction of the encoder housing (2); a contact wheel (1) is provided at the other end of the rotating shaft; the contact wheel (1) contacts the hydraulic cylinder piston rod (3); when the hydraulic cylinder piston rod (3) moves up and down, the contact wheel (1) is driven to rotate; an encoder for measuring the rotation angle of the contact wheel (1) is provided in the encoder housing (2); During operation, the free end of the hydraulic cylinder piston rod (3) is connected to one end of the insulating arm; and the hydraulic cylinder body (4) is fixed on a fixed point.
2. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: The bracket comprises a third bracket (7) fixed circumferentially around the hydraulic cylinder body (4), a fixing plate is provided on the third bracket (7), a second bracket (6) is provided on the fixing plate, the second bracket (6) is connected to the first bracket (5) via a fixing pin, and the first bracket (5) is movably connected to the rotating shaft of the encoder housing (2).
3. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: The bracket is a rigid structure, and the bracket is connected to the hydraulic cylinder body (4) via a connecting piece.
4. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: An anti-slip component is provided on the contact surface between the contact wheel (1) and the hydraulic cylinder piston rod (3); and the contact pressure between the contact wheel (1) and the hydraulic cylinder piston rod (3) is 10-50N.
5. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: The hydraulic cylinder body (4) is provided with a proportional servo valve, and the control accuracy of the movement speed of the hydraulic cylinder piston rod (3) is ±0.1 mm / s.
6. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: The encoder is an absolute photoelectric encoder, and the output signal includes a pulse direction signal and a zero position reference signal.
7. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: The hydraulic cylinder body (4) is provided with an intelligent control module supporting wireless communication, which is used for remotely receiving test instructions and uploading test data.
8. The measuring device for measuring the bending displacement of an insulating arm according to claim 7, characterized in that: The encoder and the intelligent control module are both connected to a data processing unit for performing noise filtering and smoothing processing on the test data and the displacement data measured by the encoder.
9. The measuring device for measuring the bending displacement of an insulating arm according to claim 1, characterized in that: A shock-absorbing pad is provided between the encoder housing (2) and the bracket.
10. A method for using the measuring device for measuring the bending displacement of an insulating arm according to any one of claims 1 to 9, characterized in that: include: Step 1: A first sleeve is fixedly installed at a fixed point, wherein the first sleeve forms a certain angle with the ground; one end of an insulating arm for bending displacement measurement is fixed in the first sleeve, and a second sleeve is installed at the other end of the insulating arm, wherein a connecting hole is provided on the second sleeve; Step 2: fixing the free end of the hydraulic cylinder piston rod (3) to the connecting hole via a connecting piece; Step 3: Start the hydraulic cylinder body (4), and the length of the hydraulic cylinder piston rod (3) extending out of the hydraulic cylinder body (4) begins to shorten under the push of the hydraulic oil, so that the angle between the insulating arm and the ground tends to become smaller, resulting in flexible deformation; Step 4: When the force acting on the insulating arm reaches the test requirement, the hydraulic cylinder body (4) is closed, the hydraulic cylinder piston rod (3) stops moving, and the displacement reading measured by the encoder is read.