Aircraft pneumatic valve actuator cylinder switch detection device and switch detection method

Abstract

The invention discloses an aircraft pneumatic valve actuator cylinder switch detection device and method, and the device comprises a supporting bottom plate, the front end of the supporting bottom plate is symmetrically provided with two pairs of rectangular replaceable device placement grooves, the surface of the bottom plate is provided with a positioning hole and a guide groove in the longitudinal direction, and the top end of the bottom plate is provided with a special-shaped hole; the universal switch positioning pin is inserted in the switch jack of the supporting bottom plate, and the high-elasticity clamping block is embedded in the guide groove of the supporting bottom plate; the adjusting assembly is arranged at the top end of the supporting bottom plate; the multipurpose fixing block is fixed at the top end of the supporting bottom plate through a bolt; the top end is provided with a surface hole; the high-precision dial gauge is arranged in the gauge hole; and the thrust stop block is inserted into the positioning hole of the supporting bottom plate through the positioning pin. The device is simple in design and easy to use, meets maintenance requirements, and has multiple functions of electric switch assembly positioning and fixing, flexible adjustment and device expansion, actuation stroke real-time measurement, quick electric switch clamping and dismounting, actuation pressure real-time monitoring, multi-purpose test instrument matching and electric switch function multi-scene detection.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic valve actuating cylinders for aircraft air conditioning systems, bleed air systems, APU systems, and engine systems, and particularly relates to an electric switch detection device and an electric switch detection method for aircraft pneumatic valve type actuating cylinders. Background Art

[0002] In major airlines and component maintenance manufacturers (MRO) in the civil aviation field, during the actual maintenance process of pneumatic valve type components, when most valve components are functionally maintained, the maintenance equipment used is mostly manufactured and purchased according to various models provided by OEM manufacturers. However, these devices are expensive and not easily procured. Therefore, there is an urgent need to self-design and manufacture equipment and devices that meet the functional maintenance of original factory valve type components. The present invention aims to provide an electric switch detection device that is easy to manufacture, low-cost, and has comprehensive functions to solve the existing problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric switch detection device and an electric switch detection method for aircraft pneumatic valve type actuating cylinders, so as to solve the foregoing problems existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An electric switch detection device for aircraft pneumatic valve type actuating cylinders includes a support base plate, with two pairs of rectangular replaceable device placement grooves symmetrically arranged at its front end, positioning holes and guide grooves longitudinally opened on the surface of the base plate, and a special-shaped hole opened at the top;

[0006] A general-purpose electric switch positioning pin, inserted into the electric switch jack of the support base plate, for tightly fitting and fixing with the mounting hole of the electric switch to be measured;

[0007] A high-elasticity clamping block, embedded in the guide groove of the support base plate, for clamping the electric switch wiring piece and achieving electrical conduction;

[0008] An adjusting assembly, arranged at the top of the support base plate, with its bottom end inserted into the special-shaped hole and abutted against the top end of the electric switch;

[0009] A multi-purpose fixing block, fixed to the top of the support base plate by bolts, with screw rod chutes opened on the inner walls of both sides; a dial hole is opened at the top;

[0010] A high-precision dial indicator, arranged in the dial hole; its bottom end abuts against the top end of the up-and-down adjusting screw rod;

[0011] A thrust stop block, inserted into the positioning hole of the support base plate through a positioning pin, with its optical axis forming an L-shaped structure with the ear, and the shaft end covered with a silicone rubber sleeve;

[0012] The lead cable is welded to the conductive sheet of the high-elasticity clamping block at one end and connected to the input interface of the test instrument at the other end;

[0013] The replaceable quick-pressing device includes a fixed block, a spring, and a pressing actuating rod, and the spring is sleeved on the pressing actuating rod;

[0014] The replaceable multi-purpose adjusting device includes a multi-purpose pressing block, an adjusting pressing rod with a pressure sensor, and a fixed support block for clamping an external test instrument.

[0015] In some specific embodiments, the upper end of the rod body of the up-and-down adjusting screw is provided with an anti-rotation limiting plane, which forms a sliding fit with the limiting key on the inner wall of the special-shaped hole at the top of the support bottom plate to limit the rotational freedom of the screw.

[0016] In some specific embodiments, the probe of the high-precision dial indicator extends above the multi-purpose fixing block through the universal adjusting arm, and the axis of the probe is parallel to the axis of the general-purpose switch positioning pin, and the parallelism error ≤ 0.05 mm.

[0017] In some specific embodiments, the replaceable multi-purpose adjusting device is installed in the right placement groove.

[0018] In some specific embodiments, the front end of the pressing actuating rod of the replaceable quick-pressing device is provided with a hemispherical contact head, and the center of the sphere of the contact head is directly above the center of the trigger button of the measured switch;

[0019] The vertical projection coincidence degree ≥ 95%.

[0020] In some specific embodiments, the lead cable of the high-elasticity clamping block extends to the rear terminal along the wire groove on the left edge of the support bottom plate, and the inner wall of the wire groove is provided with a silica gel anti-abrasion layer, and the bending radius of the cable ≥ 5 times the wire diameter.

[0021] In some specific embodiments, the bottom surface of the support bottom plate is provided with weight-reducing grooves arranged in a matrix, and the weight-reducing grooves are connected by reinforcing ribs to form a honeycomb-shaped support structure.

[0022] In some specific embodiments, the cylindrical surface of the general-purpose switch positioning pin is ground to a surface roughness Ra ≤ 0.8 μm, and its diameter tolerance is H7 / h6 level, and it forms an interference fit with the mounting hole of the measured switch.

[0023] A switch detection method using a detection device includes the following steps:

[0024] S1. Fix the support bottom plate on the test platform through the bottom surface vacuum chuck;

[0025] S2. Insert the measured switch into the general-purpose switch positioning pin and lock it through the U-shaped groove of the thrust stop block;

[0026] S3. Rotate the adjustment handle to drive the up and down adjustment screw, so that the head of the high-precision micrometer contacts the top of the switch actuator rod;

[0027] S4. Operate the actuator rod of the replaceable quick-press device, and record the switch on / off threshold and stroke curve through the test instrument;

[0028] S5. Replace the replaceable multi-purpose adjustment device, adjust the pressure rod to apply a set pressure, and synchronously collect the associated data of the pressure sensor and the high-precision micrometer.

[0029] The beneficial effects of the present invention are as follows: The present invention discloses a switch detection device and a switch detection method for an aircraft pneumatic valve type actuator. The device includes a support base plate, at the front end of which two pairs of rectangular replaceable device placement grooves are symmetrically arranged. Positioning holes and guide grooves are longitudinally opened on the surface of the base plate, and a special-shaped hole is opened at the top; a general switch positioning pin is inserted into the switch jack of the support base plate, and a high-elasticity clamping block is embedded in the guide groove of the support base plate; an adjustment assembly is arranged at the top of the support base plate; a multi-purpose fixing block is fixed to the top of the support base plate by bolts, and screw chutes are opened on the inner walls on both sides thereof; a meter hole is opened at the top; a high-precision micrometer is arranged in the meter hole; the bottom end thereof abuts against the top end of the up and down adjustment screw; a thrust stop block is inserted into the positioning hole of the support base plate through a positioning pin. The design of the present invention is simple and easy to use, meeting the maintenance needs, and having multiple functions such as switch component positioning and fixing, flexible adjustment and device expansion, switch on / off detection, real-time measurement of the actuation stroke, quick clamping and disassembly of the switch, real-time monitoring of the actuation pressure, supporting multi-purpose test instruments, and multi-scenario detection of switch functions. Through modular design, the device can easily achieve rapid fault detection and maintenance, improving the reliability and maintenance efficiency of components. Brief Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of a switch detection device for an aircraft pneumatic valve type actuator according to the present invention;

[0031] Figure 2 is an installation schematic diagram of the adjustment handle and the up and down adjustment screw according to the present invention;

[0032] Figure 3 is a schematic structural diagram of the support base plate according to the present invention;

[0033] Figure 4 is a schematic structural diagram of the general switch positioning pin and the high-elasticity clamping block according to the present invention;

[0034] Figure 5 is a schematic structural diagram of the adjustment handle according to the present invention;

[0035] Figure 6 is a schematic structural diagram of the up and down adjustment screw according to the present invention;

[0036] Figure 7 It is a schematic structural view of the multi-purpose fixing block of the present invention;

[0037] Figure 8 It is a schematic structural view of the thrust stop block of the present invention;

[0038] Figure 9 It is a schematic structural view of the quick pressing device of the present invention;

[0039] Figure 10 It is a schematic structural view of the fixing block of the present invention;

[0040] Figure 11 It is a schematic structural view of the pressing actuating rod of the present invention;

[0041] Figure 12 It is a schematic view of the multi-purpose adjusting device of the present invention;

[0042] Figure 13 It is a schematic structural view of the pressing actuating rod of the present invention;

[0043] Figure 14 It is a schematic structural view of the multi-purpose pressing block of the present invention;

[0044] Figure 15 It is a schematic structural view of the fixing bracket block of the present invention;

[0045] Figure 16 It is a flowchart of the switch detection method of a use detection device of the present invention;

[0046] Figure 17 It is a schematic structural view of the first embodiment of the present invention;

[0047] Figure 18 It is a schematic structural view of the second embodiment of the present invention;

[0048] Figure 19 It is a schematic structural view of the third embodiment of the present invention.

[0049] In the figure: 1. Support base plate; 2. General switch positioning pin; 3. High-elasticity clamping block; 4. Adjusting handle; 5. Upper and lower adjusting screw rod; 51. Rod body; 52. Anti-rotation limiting plane; 6. Multi-purpose fixing block; 7. High-precision dial indicator; 8. Thrust stop block; 81. Connecting block; 82. Positioning pin; 83. Handle; 9. Lead-out cable; 10. Replaceable quick-pressing device; 101. Fixing block; 102. Spring; 103. Pressing actuating rod; 1011. Spring groove; 11. Replaceable device placement groove; 12. Positioning hole; 13. Guide groove; 14. Special-shaped hole; 15. Switch jack; 20. Replaceable multi-purpose adjusting device; 201. Multi-purpose pressing block; 2021. Fixed hole position; 2022. Guide hole position; 202. Adjusting pressure rod; 203. Fixed support block; 2031. Support rod; 2032. Structure composed of adding blocks. Detailed implementation manners

[0050] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] Refer to Figures 1 to 15 A kind of actuator switch detection device for aircraft pneumatic valves shown, which includes a support base plate 1, and two pairs of rectangular replaceable device placement grooves 11 are symmetrically arranged at the front end thereof. A positioning hole 12 and a guide groove 13 are longitudinally opened on the surface of the base plate, and a special-shaped hole 14 is opened at the top. It should be noted that the tolerance of the positioning hole 12 is H7 level, and the width tolerance of the guide groove 13 is ±0.01 mm to ensure precise alignment of the components. A special-shaped hole 14 is opened at the top for accommodating the upper and lower adjusting screw rod 5 of the adjusting assembly, and a limiting key is arranged on the inner wall of the hole. The bottom surface of the support base plate 1 is provided with a matrix-arranged weight-reducing groove, and a honeycomb support structure is formed between the grooves through reinforcing ribs, which improves the overall stiffness by 30% while reducing the weight to 1.5 kg.

[0052] The support base plate 1, as the basic platform of the device, realizes the integrated fixation of the measured switch, the adjusting assembly and the testing instrument.

[0053] It is quickly fixed to the optical test platform through a vacuum chuck (suction force ≥ 0.5 MPa), and the level error ≤ 0.02 mm / m.

[0054] The general switch positioning pin 2 is inserted into the switch jack 15 of the support base plate 1 and is used for tightly fitting and fixing with the mounting hole of the measured switch.

[0055] Structural features of the general switch positioning pin 2:

[0056] The cylindrical surface is ground to a surface roughness Ra ≤ 0.8 μm, with a diameter tolerance of H7 / h6 grade, and forms an interference fit with the measured switch socket (φ6.35 ± 0.01 mm).

[0057] The top of the pin body is provided with an anti-rotation plane, which is fitted with the keyway in the switch socket 15 of the support base plate 1 to prevent circumferential offset after the switch is installed.

[0058] Function of the general switch positioning pin 2:

[0059] Realize the quick positioning and fixing of switches of different models, adapt to a tolerance range of ±0.005 mm, and ensure that the coaxiality error between the switch trigger button and the test device ≤ 0.05 mm.

[0060] In this embodiment, select a suitable general switch positioning pin 2 according to the model of the measured switch, insert it into the switch socket 15 of the support base plate 1, and install the measured switch on the support plate so that the mounting hole on the measured switch sleeves the general switch positioning pin 2.

[0061] The high-elasticity clip block 3 is embedded in the guide groove 13 of the support base plate 1 for clamping the switch wiring piece and realizing electrical conduction;

[0062] Structural features of the high-elasticity clip block 3:

[0063] A beryllium copper alloy sheet is embedded in the conductive groove at the clamping end, with a gold-plated surface treatment and a contact resistance ≤ 0.01 Ω.

[0064] Function:

[0065] Reliably clamp the switch wiring piece, ensure the stability of electrical conduction, and avoid signal interference caused by poor contact during the test.

[0066] The adjusting assembly is arranged at the top end of the support base plate 1, and its bottom end is inserted into the special-shaped hole 14 and abuts against the top end of the switch;

[0067] The adjusting assembly includes: an up-and-down adjusting screw 5:

[0068] The pitch is 1 mm, the accuracy grade is IT6, and the upper end of the rod body 51 is provided with an anti-rotation limit plane 52, which forms a sliding fit with the limit key in the special-shaped hole 14.

[0069] It should be noted that the up-and-down adjusting screw 5: has a T-shaped dry-frame threaded rod structure. The adjusting handle 4 and the top end of the up-and-down adjusting rod body 51 are threadedly connected, and then they are installed on the support base plate 1 together. The connection between the up-and-down adjusting screw 5 and the support base plate 1 is carried out through the special-shaped hole 14 to limit the up-and-down adjusting screw 5, so that during the adjustment process of the adjusting handle 4, the up-and-down adjusting screw 5 is restricted from rotating, avoiding affecting the switch detection during the switch detection process and affecting the reliability of the switch function.

[0070] The multi-purpose fixing block 6 is fixed to the top end of the support base plate 1 by bolts, and screw rod chutes are provided on the inner walls on both sides thereof; a meter hole is provided at the top end.

[0071] In this embodiment, it should be further noted that the multi-purpose fixing block 6 is of a groove door type structure and is fixedly installed on the vertical plate of the support plate. The high-precision dial indicator is installed at the top end of the multi-purpose fixing block and is fixed by a setscrew. At the same time, it is installed on the support base 1 together, and is fixed from the bottom with bolts. Adjust the positions of the dial indicator and the upper and lower adjusting screw rod 5 so that they are in normal contact under pressure, so as to adjust the adjusting handle 4 subsequently. The dial indicator can display the actuation stroke of the measured switch assembly in real time, so as to achieve the function of measuring the switch actuation stroke in real time. The top ends of both sides of the upper and lower adjusting screw rod 5 are arranged in the screw rod chutes.

[0072] The high-precision dial indicator 7 is arranged in the meter hole; the bottom end thereof abuts against the top end of the upper and lower adjusting screw rod 5;

[0073] High-precision dial indicator 7: measuring range 0 - 10 mm, resolution 0.001 mm, the measuring head extends to directly above the switch actuating rod through a universal adjusting arm, and the axis parallelism error ≤ 0.05 mm.

[0074] Function:

[0075] By rotating the adjusting handle 4 to drive the upper and lower adjusting screw rod 5, accurately adjust the contact preload of the dial indicator measuring head and the top end of the upper and lower adjusting screw rod 5 (default setting 0.05 mm), and monitor the switch triggering stroke in real time.

[0076] The thrust stop block 8 is inserted into the positioning hole 12 of the support base plate 1 through the connecting block 81. The connecting block 81 and the handle 83 form an L-shaped structure, and the end of the positioning pin 82 is coated with a silicone rubber sleeve.

[0077] It should be noted that the thrust stop block 8 has a top block structure with a handle 83. The thrust stop block 8 is installed on the support base plate through two positioning holes 12, and its fit with the support base plate is a loose fit. That is, when the measured switch is installed, the thrust stop block 8 is pushed backward. When the switch test is completed, the thrust stop block is pushed forward to complete the quick disassembly of the measured switch. That is, the quick clamping of the measured switch is assisted by the forward and backward movement of the thrust stop block, ensuring the quick test of the switch, greatly shortening the test time of the switch, and reducing the maintenance cycle of the switch.

[0078] The lead-out cable 9 is welded to the conductive piece of the high-elasticity clamping block 3 at one end and connected to the input interface of the test instrument at the other end;

[0079] The replaceable quick-pressing device 10 includes a fixing block 101, a spring 102 and a pressing actuating rod 103. The spring 102 is sleeved on the pressing actuating rod 103;

[0080] Fixed block: It has a spring groove 1011 for assembling a tension and compression spring 102, and at the same time guides the pressing actuator rod 103. When used together by hand, it can achieve the functions realized by the above-mentioned quick-pressing device.

[0081] Pressing actuator rod: It forms a quick-pressing device together with the pressing spring 102 and the fixed block 101, directly contacts the switch contact, and realizes the quick actuation of the measured switch by pressing the multi-actuator rod, that is, it realizes the functions realized by the above-mentioned quick-pressing device.

[0082] Structural features of the replaceable quick-pressing device 10:

[0083] The front end of the pressing actuator rod 103 is provided with a hemispherical contact head (diameter φ3mm), and the coincidence degree of the center of the contact head and the vertical projection of the center of the switch button is ≥95%.

[0084] The stiffness coefficient of the spring 102 is 12 N / mm, the actuation stroke is 8 mm, and the pressing speed can be adjusted through the spring groove 1011 (0.5 - 5 mm / s).

[0085] Function: Simulate the quick trigger action of the switch under the actual working state, synchronously record the stroke - on-off signal curve, and detect the action threshold and hysteresis of the switch.

[0086] In this embodiment, when performing the quick detection of the on-off of the switch, it is replaced and used, and the quick detection of the conduction of the switch assembly can be realized.

[0087] According to the test requirements of the measured switch, the quick-pressing device can be replaced, that is, the fixed block 101 included in the replaceable quick-pressing device is installed at the position of the multi-purpose fixed block of the existing device through screws for replacement. That is, when in use, the pressing actuator rod actuates the switch, and the pressing actuator rod is quickly bounced up by the spring reset method, realizing the quick test of the measured switch assembly, ensuring the quick test of the switch, greatly shortening the test time of the switch, and reducing the maintenance cycle of the switch.

[0088] Replaceable multi-purpose adjustment device 20, including a multi-purpose pressing block 201, an adjustment pressing rod 202 with a pressure sensor, and a fixed support block 203 for clamping an external test instrument.

[0089] Multi-purpose adjustment pressing rod 202: One end is connected to various sensors (displacement sensor, or pressure sensor, etc.), and the other end is connected to the measured switch contact. The connection methods are all hard connections. That is, when the measured switch is in the actuation process, the displacement or actuation force of the measured switch is immediately recognized and recorded by the sensor. The actuation stroke of the measured switch can be monitored.

[0090] Multi-purpose pressing block 201: It is provided with fixing holes 2021 and guiding holes 2022, which are used for assembling the fixed support block 203 and guiding the multi-purpose adjusting pressure rod 202 at the same time. Together with the hand, it realizes the functions achieved by the above-mentioned multi-purpose adjusting device.

[0091] The fixed support block 203 includes: a support rod 2031 and a clamping block composition structure 2032. That is, the clamping block fixes various sensors required for measurement, and can be adjusted up and down to a suitable position through the support rod 2031. The support rod 2031 is fixed to the multi-purpose measurement block. Its main function is to support and adjust the position of the sensors required for measurement, so as to cooperate with the entire device to realize the functions achieved by the above-mentioned multi-purpose adjusting device.

[0092] Structural features of the replaceable multi-purpose adjusting device 20:

[0093] The adjusting pressure rod 202 integrates a pressure sensor (range 0-50N, accuracy ±0.5% FS), and the end of the pressure head is coated with a silica gel buffer layer.

[0094] The fixed support block 203 is provided with a V-shaped fixture to adapt to the installation of external test instruments (such as oscilloscopes, data acquisition cards).

[0095] Function: Apply linear pressure to the switch button, accurately measure the on / off pressure threshold, and generate a pressure-stroke correlation curve to verify the dynamic response characteristics of the switch.

[0096] In this embodiment, the replaceable multi-purpose adjusting device 20 is used in cooperation with other measuring instruments, such as depth gauges, etc., that is, it is used for data measurement and adjustment when the switch detection device needs to achieve other functions.

[0097] It consists of a multi-purpose pressing block 201, a multi-purpose adjusting pressure rod 202 and a fixed support block 203. The multi-purpose adjusting pressure rod can realize the fixation and installation of supporting test instruments, such as hydraulic, electric actuators or pressure sensors. Also according to the test requirements of the switch to be measured, its quick pressing device is replaced. That is, the multi-purpose pressing block of the replaceable multi-purpose adjusting device is installed at the position of the multi-purpose fixing block of the existing device through screws to achieve replacement. By installing a pressure sensor for switch actuation test, it can realize real-time monitoring of the pressure required for switch component actuation, or the stroke required for switch actuation, etc. When judging the test failure of the switch to be measured, it can completely test the point switch component and fully realize the function detection of the switch.

[0098] In some specific embodiments, the upper end of the rod body 51 of the up and down adjusting screw 5 is provided with an anti-rotation limit plane 52, which forms a sliding fit with the limit key on the inner wall of the special-shaped hole 14 at the top of the support bottom plate 1 to limit the rotational freedom of the screw.

[0099] In some specific embodiments, the probe of the high-precision dial indicator extends above the multi-purpose fixing block 6 through a universal adjusting arm, and the axis of the probe is parallel to the axis of the general-purpose switch positioning pin 2, with a parallelism error ≤ 0.05 mm.

[0100] In some specific embodiments, the replaceable multi-purpose adjusting device 20 is installed in the right placing groove.

[0101] In some specific embodiments, a hemispherical contact is provided at the front end of the pressing actuating rod 103 of the replaceable quick-pressing device 10, and the center of the sphere of the contact is directly above the center of the trigger button of the measured switch;

[0102] The vertical projection coincidence degree ≥ 95%.

[0103] In some specific embodiments, the lead cable 9 of the high-elasticity clamping block 3 extends along the wire groove on the left edge of the support bottom plate 1 to the rear terminal block, and a silica gel anti-abrasion layer is provided on the inner wall of the wire groove, and the bending radius of the cable ≥ 5 times the wire diameter.

[0104] In some specific embodiments, the bottom surface of the support bottom plate 1 is provided with weight-reducing grooves arranged in a matrix, and the weight-reducing grooves are connected by reinforcing ribs to form a honeycomb-shaped support structure.

[0105] In some specific embodiments, the cylindrical surface of the general-purpose switch positioning pin 2 is ground to a surface roughness Ra ≤ 0.8 μm, and its diameter tolerance is H7 / h6 grade, forming an interference fit with the mounting hole of the measured switch.

[0106] Refer to Figure 16 A switch detection method using a detection device shown below includes the following steps:

[0107] S1. Fix the support bottom plate 1 on the test platform through the bottom surface vacuum chuck;

[0108] In this embodiment, the support bottom plate 1 is fixed on the optical test platform through the bottom vacuum chuck (suction force ≥ 0.5 MPa) to ensure that the flatness error of the bottom plate ≤ 0.02 mm / m. The chuck adopts a honeycomb-shaped weight-reducing structure design, and the stiffness is improved through the weight-reducing grooves and reinforcing ribs arranged in a matrix, while reducing the overall weight to 1.5 kg.

[0109] S2. Insert the measured switch into the general-purpose switch positioning pin 2 and lock it through the U-shaped groove of the thrust stop block 8;

[0110] In this embodiment, the general-purpose switch positioning pin 2 is positioned: Select a suitable positioning pin 82 (diameter tolerance H7 / h6 grade) according to the model of the measured switch, insert it into the front end jack of the support bottom plate 1, and form an interference fit with the mounting hole of the measured switch (surface roughness Ra ≤ 0.8 μm).

[0111] Thrust stop block 8 locking: Push the U-shaped groove (L-shaped structure) of the thrust stop block 8 to lock the switch housing, ensuring that the clearance between the bottom of the switch and the contact surface of the support base plate 1 is ≤ 0.03 mm.

[0112] Electrical connection: Insert the switch terminal into the conductive groove (beryllium copper alloy gold-plated sheet) of the high-elasticity clip block 3. The clamping force is pre-tightened to 3.5 N ± 0.2 N through the spring 102, and the contact resistance is ≤ 0.01 Ω.

[0113] S3. Rotate the adjustment handle 4 to drive the upper and lower adjustment screw 5, so that the head of the high-precision dial indicator 7 contacts the top of the switch actuator rod;

[0114] Screw adjustment: Rotate the adjustment handle 4 to drive the upper and lower adjustment screw 5 (pitch 1 mm, IT6 precision level). The anti-rotation limit plane 52 at the top of the screw cooperates with the limit key in the special-shaped hole 14 of the support base plate 1 to limit the circumferential offset.

[0115] Dial indicator contact: Adjust the probe of the dial indicator (range 0 - 10 mm, resolution 0.001 mm) to the top of the switch actuator rod, set the preload to 0.05 mm, and the axis parallelism error is ≤ 0.05 mm.

[0116] S4. Operate the actuator rod of the replaceable quick-press device 10, and record the switch on / off threshold and the stroke curve through the test instrument;

[0117] Quick-press device operation: Operate the actuator rod of the replaceable quick-press device 10 (stroke 8 mm, spring 102 stiffness coefficient 12 N / mm), press the switch button at a constant speed (2 mm / s), and the coincidence degree of the hemispherical contact head and the vertical projection of the switch trigger button is ≥ 95%.

[0118] Data recording: Synchronously record the on stroke (such as 3.25 mm), off stroke (such as 2.98 mm) and hysteresis error (≤ 0.30 mm) through the test instrument (oscilloscope / data acquisition card), and generate a stroke-on / off signal curve.

[0119] S5. Replace the replaceable multi-purpose adjustment device 20, adjust the pressure lever 202 to apply the set pressure, and synchronously collect the associated data of the pressure sensor and the high-precision dial indicator 7.

[0120] Device switching: Remove the quick-press device, install the replaceable multi-purpose adjustment device 20, and align the pressure lever 202 with the pressure sensor (range 0 - 50 N, accuracy ± 0.5% FS) with the switch trigger button.

[0121] Pressure application: Apply linear pressure through the manual knob, and collect the on pressure (such as 12.5 N) and off pressure (such as 10.8 N) in real time to generate a pressure-stroke correlation curve.

[0122] Data verification: Compare with the SAE AS4782D standard, automatically determine whether parameters such as the conduction pressure (12 ± 1 N) and hysteresis error are qualified, and output a test report.

[0123] In this embodiment, each structure is introduced as follows:

[0124] 1. The support base plate 1 is integrally processed and formed, and two replaceable device placement grooves are reserved at the front end of the base plate for placing the replaceable quick-press device 10 (including the fixed block 101, the spring 102, and the pressing actuator rod 103) and the replaceable multi-purpose adjustment device 20 (including the fixed block 101 and the multi-purpose adjustment pressure rod 202).

[0125] 2. The general-purpose switch positioning pin 2 requires a very high surface accuracy and is installed in the positioning hole 12 of the support base plate 1 in a tight fit manner to position and fix the switch to be measured.

[0126] 3. The high-elasticity clamping block 3 is processed with copper material having good conductivity so that it can better clamp the switch terminal and conduct electricity.

[0127] 4. The surface of the adjustment handle 4 is knurled for anti-slip, so as to achieve better rotation control.

[0128] 5. After the up-and-down adjustment screw rod 5 is processed, thread cutting is performed along the axial direction, and it cooperates with the adjustment handle 4 for up-and-down fine adjustment movement.

[0129] 6. The multi-purpose fixing block 6 is grooved and threaded holes are processed at the bottom, so that it can be better fixed to the support base plate 1, guide the up-and-down adjustment screw rod 5, and support the high-precision dial indicator 7 at the same time.

[0130] 7. The thrust stop block 8 includes a positioning pin 82 and a handle 83 that can be held, and the end of the positioning pin 82 is protected by a softer silicone rubber, which can better operate and protect and push out the installed switch component to be measured during use.

[0131] 8. The lead cable 9 is purchased as an aviation standard silver-plated cable and is led out to the test instrument after being connected to the high-elasticity clamping block 3.

[0132] 9. The replaceable quick-press device 10 (including the fixed block 101, the spring 102, and the pressing actuator rod 103) is replaced and used when quickly detecting the on-off of the switch, and can realize the quick detection of the conduction of the switch component.

[0133] 10. The replaceable multi-purpose adjustment device 20 (including the multi-purpose pressing block 201, the multi-purpose adjustment pressure rod 202, the fixed support block 203, and various sensors). It is used in cooperation with other measuring instruments, such as a depth gauge, etc., that is, when the switch detection device needs to realize other functions for data measurement and adjustment.

[0134] Connection method and function analysis:

[0135] For the entire device: 1. Place the entire support base plate 1 on the platform, install the high-elasticity clamping block 3 into the corresponding slot of the support base plate 1, then weld the lead-out cable 9 to the high-elasticity clamping block 3, and then use potting glue to pot and fix the high-elasticity clamping block 3 in the slot, ensuring that the high-elasticity clamping block 3 can better clamp and fix when connecting to the switch, and ensuring firm installation.

[0136] 2. The adjusting handle 4 and the upper and lower adjusting screw rod 5 are connected by threads and then installed together on the support base plate 1. The connection between the upper and lower adjusting screw rod 5 and the support base plate 1 is through a special-shaped hole to limit the upper and lower adjusting screw rod 5, so that during the adjustment of the adjusting handle 4, the rotation of the upper and lower adjusting screw rod 5 is restricted, avoiding affecting the switch detection and the reliability of the switch function due to the rotation of the upper and lower adjusting screw rod 5 during the switch detection.

[0137] 3. Install the high-precision dial indicator on the multi-purpose fixing block, fix it with a setscrew, and at the same time install it on the support base together, fix it from the bottom with bolts, adjust the positions of the dial indicator and the upper and lower adjusting screw rod 5 so that they are in normal contact under pressure, so that when adjusting the adjusting handle 4 later, the dial indicator can display the actuation stroke of the measured switch component in real time, achieving the function of real-time measurement of the switch actuation stroke.

[0138] 4. The thrust stop block 8 is installed on the support base through two positioning holes 12, and its fit with the support base is a loose fit, that is, when installing the measured switch, push the thrust stop block 8 backward, and when the switch test is completed, push the thrust stop block 8 forward to complete the quick disassembly of the measured switch, that is, the quick clamping of the measured switch is assisted by the forward and backward movement of the thrust stop block 8, ensuring the quick test of the switch, greatly shortening the test time of the switch, and reducing the maintenance cycle of the switch.

[0139] 5. The replaceable quick-pressing device 10, which consists of a fixing block 101, a spring 102 and a pressing actuator rod 103, can replace the quick-pressing device according to the test requirements of the measured switch, that is, the fixing block 101 included in the replaceable quick-pressing device 10 is installed at the position of the multi-purpose fixing block 6 of the existing device through screws to achieve replacement. That is, when in use, the pressing actuator rod 103 actuates the switch, and the pressing actuator rod 103 is quickly bounced back by the reset of the spring 102, realizing the quick test of the measured switch component, also ensuring the quick test of the switch, greatly shortening the test time of the switch, and reducing the maintenance cycle of the switch.

[0140] 6. The replaceable multi-purpose adjusting device 20 consists of a multi-purpose pressing block 201 and a multi-purpose adjusting pressing rod 202. The multi-purpose adjusting pressing rod 202 can be used to fix and install supporting test instruments, such as hydraulic and electric actuators or pressure sensors. Also, according to the test requirements of the tested switch, its quick pressing device can be replaced. That is, the multi-purpose pressing block 201 of the replaceable multi-purpose adjusting device 20 is installed at the position of the multi-purpose fixing block 6 of the existing device through screws for replacement. By installing a pressure sensor for switch actuation testing, the pressure required for the switch assembly to actuate can be monitored in real time. When judging the test faults of the tested switch, the point switch assembly can be tested well, and the function detection of the switch can be fully realized.

[0141] 7. The above includes the connection relationship of the entire switch detection device and the uses between its various parts. For this device, at least three or more device transformations can be achieved, that is, the full function tests of the supporting switch and the actuator switch of the valve type can be realized.

[0142] Example 1. Refer to Figure 17

[0143] Place the support base plate on the test platform to ensure that the base plate is stable and level.

[0144] Insert the general switch positioning pin into the positioning hole of the support base plate to fix the switch assembly to be tested and ensure its accurate position.

[0145] Install the high-elasticity clamping block in the corresponding slot on the support base plate and connect the lead-out cable to ensure connection to the test instrument.

[0146] Install the high-precision dial indicator on the multi-purpose fixing block. After fixing it with a setscrew, install the whole on the support base plate and adjust the position of the upper and lower adjusting screws to make the dial indicator contact the switch assembly and ensure that the pre-tightening pressure is appropriate.

[0147] By adjusting the adjusting handle and the upper and lower adjusting screws, slowly adjust the contact state between the dial indicator and the switch assembly, start measuring the actuation stroke of the switch assembly, and at the same time detect the on-off state of the switch through the test instrument.

[0148] After the test is completed, push the switch assembly through the thrust block to quickly disassemble the tested switch.

[0149] Example 2. Refer to Figure 18

[0150] Place the support base plate on the test platform and fix the switch assembly to be tested between the general switch positioning pin and the high-elasticity clamping block.

[0151] Replace it with a replaceable quick pressing device, including an installation fixing block, a spring, and a pressing actuator rod. Fix it at the installation position of the multi-purpose fixing block through screws.

[0152] Connect the high-elasticity clamping block to the lead-out cable and connect the cable to the test instrument.

[0153] Press the actuating rod to make the switch assembly in different switch states, and at the same time observe the change of the on-off state on the test instrument. Through the spring reset function, quickly reset the actuating rod to repeat the test.

[0154] After the test is completed, use the thrust stop to quickly remove the switch assembly.

[0155] Example 3. Refer to Figure 19

[0156] Place the support base plate on the test platform and fix the switch assembly to be tested with the universal switch positioning pin and the high-elasticity clamping block.

[0157] Replace it with a replaceable multi-purpose adjustment device, including installing a multi-purpose pressing block, a multi-purpose adjustment pressing rod and a pressure sensor, and fix it on the multi-purpose fixing block with screws.

[0158] Connect the pressure sensor to the supporting test instrument to ensure real-time acquisition of test data.

[0159] Adjust the handle and the upper and lower adjustment screws to gradually apply pressure to the switch assembly with the multi-purpose adjustment pressing rod, monitor the real-time data on the pressure sensor, and simultaneously observe the actuation state and the depth stroke of the switch.

[0160] Adjust the pressure as needed and record the performance parameters of the switch assembly under different pressures.

[0161] After the test is completed, remove the switch assembly through the thrust stop.

[0162] In summary, the beneficial effects of the present invention

[0163] Functions that can be achieved:

[0164] 1. The positioning and fixing function of the switch assembly. For switch assemblies to be tested of different models, precise positioning and stable fixing of the switch assembly are achieved by using the support base plate, the universal switch positioning pin 2 and the high-elasticity clamping block 3, ensuring the reliability of electrical connection and mechanical stability during the detection process.

[0165] 2. Flexible adjustment and device expansion function. This device is composed of multiple modular parts. During use, different switch test functions can be achieved by replacing each modular component, with strong expandability, to meet the adjustment and installation requirements of actuating cylinder switches of various types and specifications to meet the maintenance needs. At the same time, by adjusting the handle 4 and the upper and lower adjustment screws 5, the working parameters of the device can be flexibly adjusted to ensure meeting the test requirements of switch assemblies of different specifications. The modular design of the device allows components to be replaced according to needs to expand functions.

[0166] 3. The device is small and light, which can realize multi-site maintenance and avoid maintenance requirements that cannot be transferred.

[0167] 4. The on-off detection function of the electric switch can realize the on-off detection of the electric switch through the high-elastic clamp 3 and the lead-out cable 9. Combined with the quick pressing device, the on-off state of the electric switch can be quickly detected to improve the test efficiency.

[0168] 5. The real-time measurement function of the actuation stroke can realize the real-time measurement of the actuation stroke of the switch through the cooperation of the upper and lower adjustment screw 5, the high-precision micrometer and the adjustment handle 4, and provide accurate displacement data to meet the requirements of the maintenance manual.

[0169] 6. The function of quick clamping and disassembly of the switch, with the help of the forward and backward movement of the thrust block 8, assists in the quick clamping and disassembly of the tested switch assembly, greatly shortens the loading and unloading time, and improves the test efficiency.

[0170] 7. Real-time monitoring function of actuation pressure. The multi-purpose regulating device 20 can be replaced and a pressure sensor can be installed to realize real-time monitoring of the pressure required for actuation of the electric switch component, which is used to judge faults and provide actuation test data support.

[0171] 8. Multi-purpose test instrument supporting function, the replaceable multi-purpose adjustment device 20 supports integration with other test instruments (such as hydraulic, electric actuators or pressure sensors), expands the scope of application of the device, and realizes compatibility testing of supporting equipment.

[0172] 9. The multi-scenario detection function of the electric switch function can achieve the functional requirements of different test scenarios by replacing the quick pressing device and the multi-purpose adjustment device, including actuation performance test, on-off performance test, pressure test and other test items specified in the maintenance manual.

[0173] 10. High-precision micrometers and high-surface precision machined parts are used to ensure the high precision and reliability of the device in terms of actuation stroke, pressure testing, and on-off testing. At the same time, the device design is centered on fast clamping, convenient operation, and multi-functional integration, which greatly shortens the detection time of the switch components, thereby reducing the maintenance cycle and improving the reliability and maintenance efficiency of the components.

Claims

1. An aircraft pneumatic valve type actuator switch detection device, characterized in that, Comprising: A support base plate (1), at the front end of which two pairs of rectangular replaceable device placement slots (11) are symmetrically arranged. Positioning holes (12) and guide grooves (13) are longitudinally opened on the surface of the base plate, and a special-shaped hole (14) is opened at the top end; A general-purpose switch positioning pin (2), inserted into the switch jack (15) of the support base plate (1) for tight fit and fixation with the mounting hole of the switch to be measured; A high-elasticity clamping block (3), embedded in the guide groove (13) of the support base plate (1) for clamping the switch wiring piece and realizing electrical conduction; An adjusting assembly, arranged at the top end of the support base plate (1), and its bottom end is inserted into the special-shaped hole (14) and abuts against the top end of the switch; A multi-purpose fixing block (6), fixed to the top end of the support base plate (1) by bolts, with screw rod sliding grooves opened on the inner walls on both sides; a meter hole is opened at the top end; A high-precision dial indicator (7), arranged in the meter hole; its bottom end abuts against the top end of the up-and-down adjusting screw rod (5); A thrust stop block (8), inserted into the positioning hole (12) of the support base plate (1) by a positioning pin (81), the optical axis (82) of which forms an L-shaped structure with the ear (83), and the shaft end is coated with a silicone rubber sleeve; A lead-out cable (9), one end of which is welded to the conductive piece of the high-elasticity clamping block (3), and the other end is connected to the input interface of the test instrument; A replaceable quick-press device (10), including a fixing block (101), a spring (102) and a pressing actuator rod (103), and the spring (102) is sleeved on the pressing actuator rod (103); A replaceable multi-purpose adjusting device (20), including a multi-purpose pressing block (201), an adjusting pressing rod (202) with a pressure sensor, and a fixed support block (203) for clamping an external test instrument.

2. The detection device according to claim 1, characterized in that An anti-rotation limit plane (52) is provided at the upper end of the rod body (51) of the up-and-down adjusting screw rod (5), and this plane forms a sliding fit with the limit key on the inner wall of the special-shaped hole (14) at the top end of the support base plate (1) to limit the rotation freedom of the screw rod.

3. The detection device according to claim 1, characterized in that, The measuring head of the high-precision dial indicator (7) extends above the multi-purpose fixing block (6) through a universal adjusting arm, and the axis of the measuring head is parallel to the axis of the general-purpose switch positioning pin (2), and the parallelism error ≤ 0.05 mm.

4. The detection device according to claim 1, characterized in that, The replaceable multi-purpose adjusting device (20) is installed in the right placement slot (11).

5. The detection device according to claim 1, wherein A hemispherical contact is provided at the front end of the pressing actuator rod (103) of the replaceable quick-press device (10), and the center of the sphere of this contact is directly above the center of the trigger button of the switch to be measured; The vertical projection coincidence degree ≥ 95%.

6. The detection device according to claim 1, characterized in that The lead-out cable of the high-elasticity clamping block (3) extends to the rear terminal along the wire groove on the left edge of the support base plate (1), and a silicone anti-abrasion layer is provided on the inner wall of the wire groove, and the bending radius of the cable ≥ 5 times the wire diameter.

7. The detection device according to claim 1, characterized in that The bottom surface of the support base plate (1) is provided with weight-reducing grooves arranged in a matrix, and each weight-reducing groove is connected by a reinforcing rib to form a honeycomb-shaped support structure.

8. The detection device according to claim 1, wherein The cylindrical surface of the general switch locating pin (2) is ground to a surface roughness Ra ≤ 0.8 μm, and its diameter tolerance is H7 / h6 level, forming an interference fit with the mounting hole of the switch under test.

9. An electric switch detection method using the detection device according to any one of claims 1-8, characterized in that, It includes the following steps: S1. Fix the support base plate (1) on the test platform through the bottom surface vacuum chuck. S2. Insert the switch under test into the general switch locating pin (2) and lock it through the U-shaped groove of the thrust stop block (8). S3. Rotate the adjustment handle to drive the upper and lower adjustment screw rod (5) to make the head of the high-precision dial indicator (7) contact the top of the switch actuator rod (103). S4. Operate the actuator rod (103) of the replaceable quick-pressing device (10), and record the on-off threshold and stroke curve of the switch through the test instrument. S5. Replace the replaceable multi-purpose adjustment device (20), adjust the pressure rod (202) to apply a set pressure, and synchronously collect the associated data of the pressure sensor and the high-precision dial indicator (7).

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