A pressure switch consistency testing device

Abstract

The utility model provides a pressure switch consistency testing arrangement, testing arrangement includes: bottom plate, differential head fixed base is assembled on the bottom plate, differential head is assembled on the differential head fixed base, support is arranged on the bottom plate, sleeve is assembled on the support, mandrel is assembled on the support, end cover is assembled on the support, wherein, the pressure switch is assembled on the support and completes the test, the utility model provides a testing arrangement, reads the differential head's demonstration number in the testing process, can conveniently measure the stroke difference of the rocker arm in the state change of two pressure switches from being pressed to releasing.

Description

Technical Field

[0001] This utility model belongs to the field of process equipment design technology, and specifically relates to a pressure switch consistency testing device. Background Technology

[0002] A microswitch is a highly sensitive component used for control signal conversion, converting mechanical motion signals into electrical signals to meet monitoring requirements. A certain product employs a dual-redundancy design, using two microswitches to form a microswitch assembly to achieve this redundancy. The consistency of the two microswitches' monitoring directly affects the reliability of the monitoring signal; a microswitch assembly with good consistency can achieve accurate monitoring; conversely, poor consistency will cause monitoring anomalies, false alarms, and affect the judgment of the product's operating status.

[0003] The consistency of the two microswitches is critical during product operation. Due to the complex structure of the product, research on microswitch consistency testing in China is still relatively weak, and there is no dedicated debugging tool. There is an urgent need for a utility model of a dedicated microswitch consistency debugging tool. Utility Model Content

[0004] This invention provides a pressure switch consistency testing device, which helps to conveniently measure the difference in stroke at the rocker arm corresponding to the state change of two pressure switches from being pressed to being released.

[0005] This utility model provides a pressure switch consistency testing device, the testing device comprising: The base plate serves a supporting and stabilizing function, providing solid support for the components mounted on it; A differential head holder is used to fix the differential head, and the differential head holder is set on the base plate; The differential head is used for distance measurement, reading the position of the rocker arm of the pressure switch from being pressed to being released, and determining consistency based on the difference in the rocker arm position of different pressure switches; The support is mounted on the base plate. The pressure switch is mounted on the support. A sleeve is fitted onto the support; The spindle, assembled inside the sleeve on the support, is used to activate the rocker arm of the pressure switch. The differential head is coaxial with the mandrel; The multimeter connects to the two contacts of the pressure switch. When the multimeter is in the "Ω" range and the reading drops to 0, it indicates that the pressure switch has gone from being pressed to being released.

[0006] Optionally, the micrometer head mounting base is connected to the base plate by bolts.

[0007] Optionally, the micrometer head is installed in the mounting hole of the micrometer head mounting base and fixed by the mounting bolt on the top of the micrometer head mounting base.

[0008] Optionally, the support is connected to the base plate by bolts.

[0009] Optionally, the support is provided with a through hole, and the sleeve is assembled into the through hole of the support by an interference fit.

[0010] Optionally, an end cap is bolted to one side wall of the support; The length of the sleeve is less than the length of the through hole; A limit ring is provided on the outer ring of the mandrel, and the outer diameter of the limit ring is larger than the inner diameter of the sleeve; The end cap, sleeve, and limit ring work together to limit the range of movement of the mandrel.

[0011] Optionally, the end of the spindle facing the pressure switch is flat, and the end facing the micrometer head is spherical.

[0012] Optionally, the testing device is also used to re-perform a consistency test on the pressure switch after the button has been replaced when the difference between the rocker arm positions of different pressure switches is greater than a preset threshold.

[0013] The beneficial technical effects of this utility model are as follows: This invention provides a pressure switch consistency testing device, which can conveniently measure the stroke difference at the rocker arm corresponding to the state change of two pressure switches during the pressing and releasing process. By replacing the contact button, a pressure switch with good consistency can be calibrated (the stroke difference at the rocker arm corresponding to the state change of two pressure switches during the pressing and releasing process is less than 0.02mm). A pressure switch with good consistency can effectively monitor whether the actuator oil pressure is normal, which directly affects the performance of the actuator. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pressure switch consistency testing device provided in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a pressure switch consistency testing device provided in an embodiment of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the installation of the pressure switch in the testing device according to an embodiment of the present invention; Figure 4 This is a physical image of a pressure switch consistency testing device provided in an embodiment of this utility model; Figure 5 This is a test process diagram of a pressure switch consistency testing device provided in an embodiment of this utility model; Figure 6 This is a schematic diagram of a pressure switch provided in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1-Differential head holder; 2-Support; 3-Mandrel; 4-Base plate; 5-End cap; 6-Sleeve; 7-Differential head; 8-Pressure switch; 9- Bolt; 10 - Mounting bolts; 11-Lead screw; 12-Differentiometer knob; 13 - Button. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0017] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] Please see Figure 1-6 This invention provides a testing device for testing the consistency of pressure switches, which helps to conveniently measure the difference in stroke at the rocker arm corresponding to the state change of two pressure switches from being pressed to being released.

[0020] This utility model provides a pressure switch consistency testing device, the testing device comprising: The base plate 4 serves a supporting and stabilizing function, providing solid support for the components mounted on it; Micrometer head holder 1 is used to fix the micrometer head, and the micrometer head holder is set on the base plate; The differential head 7 is used for distance measurement, reading the position of the rocker arm from the moment the pressure switch is pressed to the moment it is released, and determining consistency based on the difference in the rocker arm position of different pressure switches; Support 2 is mounted on the base plate; The pressure switch 8 is mounted on the support 2 via bolts 9; Sleeve 6 is assembled on the support 2; The spindle 3 is assembled inside the sleeve 6 on the support 2 and is used to activate the rocker arm of the pressure switch. The differential head is coaxial with the mandrel; The multimeter connects to the two contacts of the pressure switch. When the multimeter is in the "Ω" range and the reading drops to 0, it indicates that the pressure switch has gone from being pressed to being released.

[0021] Optionally, the micrometer head mounting base is connected to the base plate by bolts.

[0022] Optionally, the micrometer head is installed in the mounting hole of the micrometer head mounting base and fixed by the mounting bolt 10 on the top of the micrometer head mounting base.

[0023] Optionally, the support is connected to the base plate by bolts.

[0024] Optionally, the support is provided with a through hole, and the sleeve is assembled into the through hole of the support by an interference fit.

[0025] Optionally, an end cap 5 is bolted to one side wall of the support; The length of sleeve 6 is less than the length of the through hole; A limit ring is provided on the outer ring of the mandrel, and the outer diameter of the limit ring is larger than the inner diameter of the sleeve; The end cap, sleeve, and limit ring work together to limit the range of movement of the mandrel.

[0026] Optionally, the end of the spindle facing the pressure switch is flat, and the end facing the micrometer head is spherical.

[0027] Optionally, the testing device is also used to re-perform a consistency test on the pressure switch after the button has been replaced when the difference between the rocker arm positions of different pressure switches is greater than a preset threshold.

[0028] In the embodiments of this utility model, such as Figure 3 As shown, the pressure switch assembly is fixed to the support 2 by two bolts; Figure 4 As shown, two wires are connected to the two contacts of the first pressure switch. Figure 5 As shown, a multimeter was also used to test the consistency of the pressure switch. The two wires leading from the first pressure switch were connected to the black and red probes of the multimeter, and the knob of the multimeter was turned to the "Ω" position.

[0029] Rotate the micrometer knob 12 to extend the micrometer lead screw 11, press the rocker arm until the first pressure switch is turned on, at which point the multimeter displays the resistance value; rotate the micrometer knob 12 back to retract the lead screw 11 until the first pressure switch is turned off, the multimeter resistance reading is 0, stop rotating the knob, and record the micrometer scale value a1 at this time.

[0030] Connect two wires to the two contacts of the second pressure switch, connect a multimeter, and record the differential scale value a2 of the second pressure switch from being pressed to being released, following the same procedure. Calculate the difference between the scale values ​​of the first and second pressure switches at the moment of release. If the difference is less than 0.02mm, the consistency of the dual-redundant pressure switch meets the requirements. Otherwise, button 13 needs to be replaced (e.g., Figure 6 (As shown) Repeat the above microswitch test steps until the difference is less than 0.02mm.

[0031] The above-described embodiments are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be included within the protection scope of the present invention.

Claims

1. A pressure switch consistency testing device, characterized in that, The testing apparatus includes: The base plate serves a supporting and stabilizing function, providing solid support for the components mounted on it; A differential head holder is used to fix the differential head, and the differential head holder is set on the base plate; The differential head is used for distance measurement, reading the position of the rocker arm of the pressure switch from being pressed to being released, and determining consistency based on the difference in the rocker arm position of different pressure switches; The support is mounted on the base plate. The pressure switch is mounted on the support. A sleeve is fitted onto the support. The spindle, assembled inside the sleeve on the support, is used to activate the rocker arm of the pressure switch. The differential head is coaxial with the mandrel; The multimeter connects to the two contacts of the pressure switch. When the multimeter is in the "Ω" range and the reading drops to 0, it indicates that the pressure switch has gone from being pressed to being released.

2. The pressure switch consistency testing device according to claim 1, characterized in that, The micrometer head mounting base is connected to the base plate by bolts.

3. The pressure switch consistency testing device according to claim 1, characterized in that, The micrometer head is installed in the mounting hole of the micrometer head mounting base and fixed by the mounting bolt on the top of the micrometer head mounting base.

4. The pressure switch consistency testing device according to claim 1, characterized in that, The support is connected to the base plate by bolts.

5. The pressure switch consistency testing device according to claim 1, characterized in that, The support has a through hole, and the sleeve is assembled into the through hole of the support by interference fit.

6. The pressure switch consistency testing device according to claim 5, characterized in that, An end cap is fixed to one side wall of the support by bolts; The length of the sleeve is less than the length of the through hole; A limit ring is provided on the outer ring of the mandrel, and the outer diameter of the limit ring is larger than the inner diameter of the sleeve; The end cap, sleeve, and limit ring work together to limit the range of movement of the mandrel.

7. The pressure switch consistency testing device according to claim 1, characterized in that, The end of the spindle facing the pressure switch is flat, and the end facing the differential head is spherical.

8. The pressure switch consistency testing device according to claim 1, characterized in that, The testing device is also used to re-perform a consistency test on the pressure switch after the button has been replaced when the difference between the rocker arm positions of different pressure switches is greater than a preset threshold.

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