CN215880616U - Strain hole paster device of pin shaft sensor - Google Patents
Strain hole paster device of pin shaft sensor Download PDFInfo
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- CN215880616U CN215880616U CN202121629419.5U CN202121629419U CN215880616U CN 215880616 U CN215880616 U CN 215880616U CN 202121629419 U CN202121629419 U CN 202121629419U CN 215880616 U CN215880616 U CN 215880616U
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Abstract
The utility model discloses a pin shaft sensor strain hole paster device which comprises an elastic tube, a switch valve and an air guide tube, wherein the outer diameter of the elastic tube is smaller than the aperture of a strain hole; one end of the air duct far away from the switch valve is connected with an air pump; a supporting tube is arranged in the elastic tube; the supporting tube is in a circular tube shape. With the help of this device, the operator can easily accomplish the paster work of round pin axle sensor, and the paster precision is high.
Description
Technical Field
The utility model relates to the technical field of pin shaft sensors, in particular to a strain hole surface mounting device of a pin shaft sensor.
Background
The pin sensor is one of weighing sensors. As shown in fig. 4, the conventional pin sensor includes a pin-shaped elastic body 16, a strain hole 17 is formed in the elastic body 16, and a strain gauge 18 is attached to an inner wall of the strain hole 17. When the pin sensor is used, the elastic body can elastically deform after being stressed, so that the strain gauge deforms to a certain extent, the resistance value of the strain gauge changes accordingly, and the resistance change is converted into an electric signal (voltage or current) through a corresponding measuring circuit, so that the process of converting external force into the electric signal is completed.
In the existing pin shaft sensor, due to the characteristics of large length-diameter ratio and deep strain hole of the strain hole, when a strain gauge is attached to the inner wall of the strain hole, an operating hand is difficult to extend into the strain hole, and the manual operation difficulty is large.
Disclosure of Invention
The utility model aims to solve the problem that the manual operation difficulty is high when a strain gauge is attached to the inner wall of a strain hole due to the characteristics of large length-diameter ratio and deep strain hole in the conventional pin shaft sensor, and provides a strain hole attaching device of the pin shaft sensor, which can effectively solve the problem.
The purpose of the utility model is realized by the following technical scheme: a strain hole paster device of a pin shaft sensor comprises an elastic tube, a switch valve and an air guide tube, wherein the outer diameter of the elastic tube is smaller than the aperture of a strain hole, one end of the elastic tube is provided with a plug, the other end of the elastic tube is connected with an inflation connector, one end of the switch valve is connected with the inflation connector, the other end of the switch valve is connected with the air guide tube, and the air guide tube is connected with the switch valve through a quick connector; one end of the air duct far away from the switch valve is connected with an air pump; a supporting tube is arranged in the elastic tube; the supporting tube is in a circular tube shape.
According to the utility model, the quick connection and the disassembly between the air guide pipe and the switch valve can be realized through the quick connector. When the elastic patch is used, the inner wall of a strain hole on the elastic body is cleaned, and the patch part is mainly cleaned; after cleaning, adhering one side of a strain gauge to the outer surface of an elastic tube through a double-sided adhesive sticker, then uniformly coating a strain gauge adhesive on the other side of the strain gauge, then extending the elastic tube into a strain hole, aligning the strain gauge to a patch part on the inner wall of the strain hole, then connecting an air guide tube with a switch valve through a quick connector, then opening the switch valve, inflating the elastic tube through an air pump to expand the elastic tube, adhering the strain gauge to the inner wall of the strain hole after the elastic tube is expanded, then closing the switch valve and keeping for a period of time; after the strain gauge adhesive is cured, the air guide tube is pulled out of the switch valve, the switch valve is opened, air is leaked in the elastic tube, the elastic tube is contracted to an initial state, the strain gauge is separated from the outer surface of the elastic tube, and finally the elastic tube is taken out of the strain hole to finish patch mounting work. In the actual use process, the double-sided self-adhesive with lower viscosity can be selected, so that the elastic tube can be conveniently separated from the strain gauge after being contracted. The supporting tube is made of hard materials and plays a supporting role for the elastic tube, so that the elastic tube cannot be bent greatly. With the help of this device, the operator can easily accomplish the paster work of round pin axle sensor, and the paster precision is high.
Preferably, one end of the elastic pipe close to the inflation connector is provided with a limiting plate.
Preferably, the outer side of the elastic tube is provided with a groove, the bottom of the groove is provided with an electric heating plate, an opening of the groove is provided with an elastic membrane, and a plurality of heated bending parts are arranged between the elastic membrane and the electric heating plate; the heated bending part is in a C shape and consists of an outer metal layer and an inner metal layer, and the thermal expansion coefficient of the outer metal layer is greater than that of the inner metal layer; the two ends of the heated bending part are respectively provided with a connecting end, and the connecting ends at the two ends of the heated bending part are respectively fixedly connected with the elastic diaphragm and the electric heating plate. The electric heating plate is connected with external electric control equipment, and the heating temperature can be controlled under the control of the electric control equipment. One side of the strain gauge is adhered to the elastic soft film through a double-sided adhesive sticker, the elastic tube is inflated to expand, the strain gauge is adhered to the inner wall of the strain hole, the strain gauge adhesive is initially cured after the strain gauge adhesive is kept in the state for a period of time, then an electric heating plate is started to heat and cure the strain gauge adhesive, the electric heating plate is heated at a certain speed, the heating speed is 5 ℃/min until the heating temperature of the heating plate reaches 160 ℃, the optimal curing temperature is reached at the moment, the strain gauge adhesive is kept at the temperature for 2 hours, and then the electric heating plate is closed; the electric heating plate is at the in-process that heats up, because the thermal expansion coefficient of the crooked part outside metal level that is heated is greater than the thermal expansion coefficient of inboard metal level, consequently at the temperature in-process that rises, the both ends of the crooked part that receives can be simultaneously towards the direction of both centers crooked to pull elastic diaphragm towards the direction of recess bottom, make elastic diaphragm can be sunken towards the bottom direction of recess, make elastic diaphragm can break away from with the foil gage gradually at the recess in-process. Because the electric heating plate is heated at a certain speed, the elastic membrane is also slowly sunken downwards along with the temperature rise, so that the separation process of the elastic membrane and the strain gauge is slow and soft, and the influence on the patch effect is avoided. If there is not above-mentioned process, the elastic tube can shrink back to initial condition fast after disappointing for can take place to break away from fast between elastic tube and the foil gage, very easily because break away from speed too fast, the elastic tube influences the paster effect with too big to the instantaneous pulling force of foil gage when breaking away from with the foil gage.
Preferably, the heat receiving bent members are arranged in a linear array.
Preferably, the outer metal layer is made of copper and the inner metal layer is made of invar.
Preferably, the support tube is made of stainless steel.
Preferably, the on-off valve is a ball valve.
The utility model has the beneficial effects that: with the help of this device, the operator can easily accomplish the paster work of round pin axle sensor, and the paster precision is high.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a cross-sectional view of a heated curved component.
Fig. 4 is a schematic structural diagram of a conventional pin sensor.
In the figure: 1. elastic tube, 2, inflation joint, 3, ooff valve, 4, quick-operation joint, 5, air duct, 6, limiting plate, 7, stay tube, 8, end cap, 9, recess, 10, electric heating board, 11, elastic diaphragm, 12, the bending part that is heated, 13, outside metal level, 14, inboard metal level, 15, link, 16, elastomer, 17, strain hole, 18, foil gage.
Detailed Description
The utility model is further described by the following detailed description in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 3, a strain hole patch device of a pin sensor comprises an elastic tube 1, a switch valve 3 and an air duct 5. The elastic tube 1 is in a circular tube shape. The elastic tube 1 is made of silicone rubber. The outer diameter of the elastic tube 1 is smaller than the aperture of the strain hole 17 on the pin sensor. One end of the elastic tube 1 is provided with a plug 8, and the other end of the elastic tube 1 is connected with an inflation connector 2. One end of the switch valve 3 is connected with the inflation connector 2, and the other end of the switch valve 3 is connected with the air duct 5. The switch valve 3 is a ball valve. Air duct 5 links to each other through quick-operation joint 4 between the ooff valve 3, can realize the quick connection and the dismantlement between air duct 5 and the ooff valve 3 through quick-operation joint 4. One end of the air duct 5 far away from the switch valve 3 is connected with an air pump. A supporting tube 7 is arranged in the elastic tube 1, the supporting tube 7 is in a circular tube shape, and the supporting tube 7 is made of stainless steel. One end of the elastic tube 1 close to the inflation connector 2 is provided with a limit plate 6.
The outside of elastic tube 1 is provided with recess 9, and the bottom of recess 9 is provided with electric heating plate 10. The electrical heating plate 10 is prior art. The electric heating plate 10 is connected with an external electric control device, and the heating temperature can be controlled under the control of the electric control device. An elastic membrane 11 is arranged at the opening of the groove 9, and a plurality of heated bending parts 11 are arranged between the elastic membrane 11 and the electric heating plate. The heat receiving bent members 11 are arranged in a linear array. The heated bending part is in a C shape. The thermally conductive bent member 11 is composed of an outer metal layer 13 and an inner metal layer 14, and the coefficient of thermal expansion of the outer metal layer 13 is larger than that of the inner metal layer 14. In the present invention, the outer metal layer 13 is made of copper, and the inner metal layer 14 is made of invar. The two ends of the heated bending part are respectively provided with a connecting end 15, and the connecting ends 15 at the two ends of the heated bending part are respectively fixedly connected with the elastic diaphragm 11 and the electric heating plate 10.
When the device is used for pasting the patch, the use method is as follows:
the method comprises the following steps: selecting a rod body, wherein the diameter of the rod body is smaller than the aperture of the strain hole on the elastic body, binding an abrasive cloth at one end of the rod body, extending the end of the abrasive cloth into the strain hole, and polishing and wiping the patch part back and forth; then, the opening end of the strain hole faces downwards, the abrasive cloth at the end part of the rod body is taken down, the gauze is replaced, a proper amount of acetone is dipped, and the paster part is wiped again; after wiping, the residual acetone at the patch part is wiped dry by using a clean dry cotton strip. In this step, mainly clean the paster position, avoid influencing the paster effect because of paster position department is unclean.
Step two: one side of the strain gauge is adhered to the elastic diaphragm on the outer side of the elastic tube through double-sided adhesive sticker, then the other side of the strain gauge is coated with strain gauge adhesive, and then the elastic tube extends into the strain hole in the elastic body, and the strain gauge is aligned to the patch part.
Step three: the air guide pipe is connected with the switch valve through the quick connector, the switch valve is opened, the elastic pipe is inflated through the air pump, the elastic pipe is expanded, after the elastic pipe is expanded, the strain gauge is attached to the inner wall of the strain hole, the switch valve is closed, and the elastic pipe is kept for 3-5 minutes. In the step, the strain gauge is tightly pressed on the inner wall of the strain hole through inflation and expansion of the elastic tube, and after the strain gauge is kept for 3-5 minutes, the elastic tube is ensured to be free of air leakage, so that the strain gauge is preliminarily fixed on the inner wall of the strain hole.
Step four: starting the electric heating plate, and heating and curing the strain gauge by the electric heating plate; the heating rate of the electric heating plate was 5 ℃/min during heating, and after the electric heating plate was heated to 160 ℃, the temperature was maintained for 2 hours, and then the electric heating plate was closed. In the step, the strain gauge is heated and cured through the electric heating plate, so that the curing effect is realized. The electric heating plate is at the in-process that heats up, because the thermal expansion coefficient of the crooked part outside metal level that is heated is greater than the thermal expansion coefficient of inboard metal level, consequently at the temperature in-process that rises, the both ends of the crooked part that receives can be simultaneously towards the direction of both centers crooked to pull elastic diaphragm towards the direction of recess bottom, make elastic diaphragm can be sunken towards the bottom direction of recess, make elastic diaphragm can break away from with the foil gage gradually at the recess in-process. Because the electric heating plate is heated at a certain speed, the elastic membrane is also slowly sunken downwards along with the temperature rise, so that the separation process of the elastic membrane and the strain gauge is slow and soft, and the influence on the patch effect is avoided. If there is not above-mentioned process, the elastic tube can shrink back to initial condition fast after disappointing for can take place to break away from fast between elastic tube and the foil gage, very easily because break away from speed too fast, the elastic tube influences the paster effect with too big to the instantaneous pulling force of foil gage when breaking away from with the foil gage.
Step five: pull out the air duct from the ooff valve, then open the ooff valve, lose heart in the elastic tube for the elastic tube shrink takes out the elastic tube from the strain hole afterwards, and the paster is accomplished.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (7)
1. The utility model provides a round pin axle sensor strain hole paster device which characterized by: the device comprises an elastic tube, a switch valve and an air guide tube, wherein the outer diameter of the elastic tube is smaller than the aperture of a strain hole, one end of the elastic tube is provided with a plug, the other end of the elastic tube is connected with an inflation connector, one end of the switch valve is connected with the inflation connector, the other end of the switch valve is connected with the air guide tube, and the air guide tube is connected with the switch valve through a quick connector; one end of the air duct far away from the switch valve is connected with an air pump; a supporting tube is arranged in the elastic tube; the supporting tube is in a circular tube shape.
2. The pin sensor strain hole patch device as claimed in claim 1, wherein a limiting plate is disposed at an end of the elastic tube close to the inflation connector.
3. The strain hole paster device of the pin sensor according to claim 1 or 2, wherein the outside of the elastic tube is provided with a groove, the bottom of the groove is provided with an electric heating plate, the opening of the groove is provided with an elastic membrane, and a plurality of heated bending parts are arranged between the elastic membrane and the electric heating plate; the heated bending part is in a C shape and consists of an outer metal layer and an inner metal layer, and the thermal expansion coefficient of the outer metal layer is greater than that of the inner metal layer; the two ends of the heated bending part are respectively provided with a connecting end, and the connecting ends at the two ends of the heated bending part are respectively fixedly connected with the elastic diaphragm and the electric heating plate.
4. The pin sensor strain hole patch device of claim 3, wherein the heated flexures are arranged in a linear array.
5. The pin sensor strain hole patch device of claim 3, wherein the outer metal layer is made of copper and the inner metal layer is made of invar.
6. The pin sensor strain hole patch device of claim 1, wherein the support tube is made of stainless steel.
7. The pin sensor strain hole patch device as claimed in claim 1, wherein the switch valve is a ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629419.5U CN215880616U (en) | 2021-07-16 | 2021-07-16 | Strain hole paster device of pin shaft sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629419.5U CN215880616U (en) | 2021-07-16 | 2021-07-16 | Strain hole paster device of pin shaft sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215880616U true CN215880616U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121629419.5U Active CN215880616U (en) | 2021-07-16 | 2021-07-16 | Strain hole paster device of pin shaft sensor |
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|---|---|
| CN (1) | CN215880616U (en) |
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2021
- 2021-07-16 CN CN202121629419.5U patent/CN215880616U/en active Active
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