CN111855035A - Plum contact pressure tester, detection system - Google Patents

Abstract

The invention discloses a plum blossom contact pressure tester, a detecting system, relating to the technical field of electric component pressure detecting devices, comprising a handle, wherein a cavity structure is formed in the handle, and the plum blossom contact pressure tester is characterized by also comprising: the data transmission assembly is arranged in the cavity structure of the handle; the sensor assemblies are respectively connected with the input ends of the data transmission assemblies; a plurality of the sensor components are arranged on the upper end of the handle through connecting components and the like. The technical scheme disclosed herein quantitatively detects the radial elastic deformation contact pressure of the plum blossom contact wafer.

Description

Plum contact pressure tester, detection system

technical field

The invention discloses and relates to the technical field of pressure detection devices for electrical components, in particular to a plum blossom contact pressure tester and a detection system.

Background technique

The plum-blossom contact is used for primary conduction of high-voltage vacuum circuit breakers, central cabinets, handcarts, etc. The precise pressure measurement of the plum-blossom contact can effectively control the contact resistance, reduce the heating of the contact part, and improve the reliability and safety of conduction. It is well known The plum-blossom contact consists of a contact piece, a support frame, a tension spring, etc. The tension spring provides radial force to make each contact piece closely connect with the static contact. At present, only the quality (material, size) of the tension spring can be controlled. Control the radial elastic deformation contact pressure of each contact piece. The radial elastic deformation contact pressure of the contact piece cannot be quantitatively detected, and it is impossible to verify whether it reaches the specified value. Design a method that can quantitatively detect the radial elastic deformation contact pressure of the plum-blossom contact piece. The plum blossom contact pressure testing device is an urgent problem to be solved.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art, the disclosed embodiments of the present invention provide a plum blossom contact pressure tester. The technical solution is as follows:

According to a first aspect of the disclosed embodiments of the present invention, there is provided a plum-blossom contact pressure tester, comprising a handle with a cavity structure formed inside the handle, and the plum-blossom contact pressure tester further comprising:

The Torx Contact Pressure Tester also includes:

The data transmission component is arranged in the cavity structure of the handle;

At least one pair of sensor assemblies are respectively connected with the input ends of the data transmission assemblies; a plurality of the sensor assemblies are equiangularly arranged on the upper end of the handle through the connection assemblies.

In one embodiment, the data transmission assembly includes at least two data processing chips and a power supply, at least two of the data processing chips are respectively connected in parallel with the power supply, and at least the two data processing chips are arranged in the cavity structure of the handle. In the upper part, the power supply is arranged in the lower part of the cavity structure of the handle.

In one embodiment, the connection assembly includes a mounting block and a fixing seat, wherein,

The mounting block is arranged on the upper end of the handle, and the lower end of the fixing seat penetrates the mounting block and is inserted into the cavity structure of the handle.

In one embodiment, the sensor assembly includes a test head and a sensor, wherein,

The test head is connected with the sensor through the test head fixing piece;

A pair of sensors of each group of sensor assemblies are mounted on the side surface of the holder at an equal angle.

In one embodiment, at least a pair of sensor positioning pieces are provided on the upper surface of the mounting block, and at least one pair of the sensor positioning pieces are symmetrically arranged about the axis of the fixing base, and are attached and fixed to the surface of the sensor.

In one embodiment, the upper end of the mounting block is provided with a dust cover, and the upper surface of the dust cover forms an opening for passing the detection head.

In one embodiment, the lower surface of the handle forms an opening communicating with its inner cavity structure, and an end cap is provided at the opening.

The data processing and display terminal includes a casing, a main control MCU disposed inside the casing, a display screen disposed on the surface of the casing, a key assembly, and an embedded printer disposed in the casing with an exposed printing port.

According to a first aspect of the embodiments of the present disclosure, there is provided a detection system applying the above-mentioned quincunx contact pressure tester, the detection system comprising the quincunx contact pressure tester and a data processing and display terminal, the quincunx contact The stress tester transmits test data to the data processing and display terminal wirelessly.

The technical solutions provided by the embodiments disclosed in the present invention may include the following beneficial effects:

First, each group of symmetrically arranged sensors extends into the inner channel of the quincunx contact to detect the radial elastic deformation contact pressure of the contact piece of the quincunx contact;

Second, through the data processing chip, the pressure detection analog quantity is converted into digital quantity, and sent to display, and the pressure measurement value is accurately obtained;

Third, use the mounting block to fix the sensor assembly on the upper end of the handle, which is convenient for disassembly. When a fault occurs, replace it with a spare sensor assembly without delaying use;

Fourth, the fixing seat is used to fix the lower parts of the multiple sets of symmetrically arranged sensor components, and the multiple sets of sensor components are fixed on the side wall of the fixing seat at equal angles, and the tightening force is uniform;

Fifth, use the sensor positioning assembly symmetrical about the fixed seat to prevent the sensor from deviating from the initial position axially due to external force during installation or use.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is the sectional view of a kind of plum blossom contact pressure tester of the present invention;

2 is a partial cross-sectional view of a plum blossom contact pressure tester according to the present invention

3 is a perspective view of a plum blossom contact pressure tester according to the present invention;

4 is a perspective view of a plum blossom contact pressure tester according to the present invention;

Fig. 5-1 is the first installation exploded view of a plum-blossom contact pressure tester according to the present invention;

Figure 5-2 is a second installation exploded view of a plum blossom contact pressure tester according to the present invention;

Figure 6-1 is a cross-sectional view of the A-A plane of Figure 3;

Figure 6-2 is a top view of the sensor positioning sheet according to the invention;

Fig. 7 is the connection schematic diagram of the detection system of the present invention;

8 is a connection diagram of the detection system according to the present invention;

9 is a main control circuit diagram of the plum blossom contact pressure tester according to the present invention;

10 is an electrical schematic diagram of the connection between the test head and the sensor according to the present invention;

Reference number:

1. Mounting block 2. Mounting base 3. Sensor

4. Cavity structure 5. Sensor positioning piece 501, smooth part

502. Second screw 6. Test head 7. Test head fixing plate

701, third screw 702, fourth screw 8, handle

9. Anti-skid nut 10. End cover 11. Dust cover

12. Power supply 13. Data processing chip 1401. Shell

1402, main control MCU 1403, display screen 1404, key components

1405. Embedded printer 201. The first screw

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

The technical solutions provided by the disclosed embodiments of the present invention relate to a plum-blossom contact pressure tester, and in particular, to the technical field of pressure detection devices for electrical components. In the related art, the plum-blossom contact is composed of a contact piece, a support frame, a tension spring, etc. The tension spring provides radial force to make each contact piece closely connect with the static contact. At present, only the quality of the tension spring can be controlled (material, size) to control the radial elastic deformation contact pressure of each contact piece, the radial elastic deformation contact pressure of the contact piece cannot be quantitatively detected, and it cannot be verified whether it reaches the specified value. Based on this, in the quincunx contact pressure tester provided by the technical solution of the present disclosure, each group of symmetrically arranged sensors extends into the inner channel of the quincunx contact to detect the radial elastic deformation contact pressure of the contact pieces of the quincunx contact; , convert the pressure detection analog quantity into digital quantity, and send it to display, and accurately obtain the pressure measurement value; use the mounting block to fix the sensor assembly on the upper end of the handle, which is convenient for disassembly. When a fault occurs, replace it with a spare sensor assembly without delay Use; use the fixed seat to fix the lower part of the multiple sets of symmetrically arranged sensor components, and the multiple sets of sensor components are fixed on the side wall of the fixed seat at equal angles, and the tightening force is uniform; use the sensor positioning components that are symmetrical about the fixed seat to prevent During installation or use, the sensor deviates from the initial position axially due to external force.

FIG. 1 exemplarily shows a cross-sectional view of the plum-blossom contact pressure tester provided by the technical solution disclosed in the present invention. According to Fig. 1 to Fig. 10, it can be seen that a handle is included, and the interior of the handle forms a cavity structure, and the plum blossom contact pressure tester also includes: one or more sensor components, and more than one sensor components are provided on the handle 8 equiangularly through the connecting components. The upper end; the data transmission assembly, the data transmission assembly is arranged in the cavity structure 4 of the handle 8; at least one pair of the sensor assemblies is respectively connected with the input end of the data transmission assembly, it should be further pointed out that the group of the sensor assembly The number can be a base number or an even number. Considering the manufacturing cost and the pressure measurement accuracy, the number is preferably six. In the example, six pressure sensor assemblies are arranged around the fixed seat at equal angles.

In the example, the mounting block 1 is threadedly connected to the handle 8 for easy disassembly.

In the example, as shown in Figure 8 to Figure 10, the sensor uses a commercially available piezoresistive strain pressure sensor, the key component uses a 16-key matrix industrial keyboard, and the display uses a 5-inch color screen tftSTM32 available on Taobao, and the SPIFSMC directly For the driven display screen, the above components can be connected and communicated with the main control MCU.

In one embodiment, the data transmission assembly includes at least two data processing chips 13 and a power source 12, at least two of the data processing chips 13 are connected in parallel with the power source 12 respectively, and at least the two data processing chips 12 are disposed on the handle 8, the power supply 12 is arranged in the lower part of the cavity structure 4 of the handle 8. It should be further pointed out that, in order to save space and facilitate disassembly and replacement, at least two data processing chips 12 are arranged in parallel at equal distances. In the cavity structure 4 , the distance between two adjacent data processing chips 12 is in the range of 3-5 mm, which is conducive to heat dissipation and prolongs the service life of the data processing chips 12 .

In one embodiment, the connection assembly includes a mounting block 1 and a fixing base 2 , wherein the mounting block 1 is disposed on the upper end of the handle 8 , and the lower end of the fixing base 2 penetrates the mounting block 1 and is inserted into the handle 8 . In the cavity structure 4, it should be further pointed out that the contact part of the mounting block 1 and the handle 8 is fitted with a non-slip nut 9 to prevent the mounting block 1 and the handle 8 from being displaced relative to each other.

In one embodiment, the sensor assembly includes a test head 6 and a sensor 3, wherein the test head 6 is connected to the sensor 3 through a test head fixing plate 7; a pair of sensors 3 of each group of sensor assemblies are installed at an equal angle on the On the side surface of the fixing base 2, it should be further pointed out that the upper part of the test head fixing piece 7 is fixed on the side surface of the test head 6 by the third screw 701, and the lower part of the test head fixing piece 7 is fixed by the fourth screw 702. On the side surface, the relative fixing of the test head 6 and the sensor 3 is realized, and the sensor 3 is fixed on the fixing base 2 at an equal angle by the first screw 201 .

In the example, as shown in FIG. 5 , the upper surface of the mounting block 1 is provided with at least one pair of sensor positioning pieces 5 . The surface is attached and fixed. It should be further pointed out that the sensor positioning sheet 5 is an arc-shaped sheet-shaped structure, and the arc-shaped sheet-shaped structure is fixed on the upper surface of the mounting block 1 by the second screw 502. The outer surface of the arc-shaped sheet-shaped structure is It is an arc surface with a smooth transition. The inner surface of the arc-shaped sheet structure is a smooth part 501 including a circle and an equal angle, wherein the smooth part is completely fitted with the outer surface of the sensor to achieve the purpose of limiting, and the sensor positioning piece 5 is used to reduce The radial displacement of the sensor under the pressure of the plum blossom contact prevents the horizontal displacement of the sensor 3.

In one embodiment, the upper end of the mounting block 1 is provided with a dust cover 11 , and the upper surface of the dust cover 11 forms an opening for passing the test head 6 .

In one embodiment, the lower surface of the handle 8 forms an opening that communicates with its internal cavity structure 4 , and an end cap 10 is provided at the opening. It should be further noted that the end cap 10 and the lower end of the handle 8 are threaded connect.

Embodiment 2, as shown in Figure 6 to Figure 7:

A detection system using the above-mentioned quincunx contact pressure tester, the detection system includes the quincunx contact pressure tester and a data processing display terminal 14, the quincunx contact pressure tester transmits wirelessly to the data processing and display terminal Test data.

In one embodiment, the data processing and display terminal 14 includes a casing 1401, a main control MCU 1402 disposed inside the casing 1401, a display screen 1403 disposed on the surface of the casing, a key assembly 1404, and a printing port is exposed in the casing 1401. The inline printer 1405.

Working principle: Insert the test head 6 of the sensor assembly into the plum-blossom contact under test, the plum-blossom contact is stretched, and under the action of the radial elastic deformation of the plum-blossom contact piece, the test head 7 of each sensor assembly Both are subjected to the radial elastic deformation contact pressure F of the contact piece of the plum-blossom contact, and the pressure strain gauge corresponding to the sensor 3 is deformed. With the difference of the deformation amount, the Wheatstone bridge in the strain gauge outputs different voltages under the excitation of the power supply voltage. Signal, using the data processing chip 13, the six (or more) signals are amplified by the amplifying circuit to amplify the weak voltage signal, the analog quantity is converted into a digital quantity by the A/D conversion circuit, and then wirelessly transmitted to the main control MCU1402, after The operation of the main control MCU 1402 finally accurately displays the pressure of each contact piece of the plum-blossom contact, as well as the pressure sum, average value, mean square error, etc., on the display screen 1403, achieving a plug-and-display effect.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited by the appended claims.

Claims (9)

1. The utility model provides a plum blossom contact pressure tester, includes the handle, the inside vacuole formation structure of handle, its characterized in that, this plum blossom contact pressure tester still includes:

the data transmission assembly is arranged in the cavity structure of the handle;

the sensor assemblies are respectively connected with the input ends of the data transmission assemblies; a plurality of the sensor components are arranged on the upper end of the handle through connecting components and the like.

2. The plum blossom contact pressure tester as claimed in claim 1, wherein said data transmission assembly comprises at least two data processing chips and a power supply;

the data processing chip is connected with the power supply in parallel, the data processing chip is arranged on the upper portion of the cavity structure of the handle, and the power supply is arranged on the lower portion of the cavity structure of the handle.

3. The plum blossom contact pressure tester as claimed in claim 1, wherein said connecting assembly comprises a mounting block and a fixing seat, wherein,

the installation block is arranged at the upper end of the handle, and the lower end of the fixing seat penetrates through the installation block and is inserted into the cavity structure of the handle.

4. The tulip contact pressure tester of claim 3, wherein the sensor assembly comprises a test head and a sensor, wherein,

the test head is connected with the sensor through the test head fixing piece;

and a pair of sensors of each group of sensor components are arranged on the side surface of the fixed seat at equal angles.

5. The plum blossom contact pressure tester of claim 3, wherein the upper surface of the installation piece is provided with at least one pair of sensor locating pieces, and the at least one pair of sensor locating pieces are symmetrically arranged about the axis of the fixed seat and are fixedly attached to the surface of the sensor.

6. The plum blossom contact pressure tester as claimed in claim 3, wherein the upper end of the mounting block is provided with a dust cover, and an opening for passing the probe is formed on the upper surface of the dust cover.

7. The plum blossom contact pressure tester as claimed in claim 1, wherein the lower surface of the handle forms an opening communicated with the internal cavity structure thereof, and the opening is provided with an end cap.

8. The plum blossom contact pressure tester of claim 7, wherein the data processing display terminal comprises a housing, a main control MCU arranged inside the housing, a display screen arranged on the surface of the housing, a key assembly, and an embedded printer arranged inside the housing and having an exposed printing port.

9. A detection system using the plum blossom contact pressure tester as claimed in any one of claims 1-8, wherein the detection system comprises the plum blossom contact pressure tester and a data processing display terminal, and the plum blossom contact pressure tester transmits detection data to the data processing display terminal in a wireless manner.

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