Double-gold switch, relay delay characteristic verification method and system

Abstract

The present invention relates to the field of low-voltage electrics, and particularly relates to a method for verifying the delay characteristics of a double-metal switch, which includes a tripping stroke pre-adjustment operation and a tripping point verification operation; the method for verifying the delay characteristics of the double-metal switch is suitable for automated operation, and has a high verification pass rate and high efficiency. The present invention also relates to a method for verifying the delay characteristics of a relay, which includes operations such as primary pre-adjustment, tripping point verification, and secondary pre-adjustment, is suitable for automated operation, and has a high passing rate during inspection and high efficiency. The present invention further relates to a device for verifying the delay characteristics of a relay applying the method for verifying the delay characteristics of the relay, which realizes the automated and rapid verification of the delay characteristics of the relay.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrics, and particularly relates to a method for verifying the delay characteristic of a double-metal switch, a method for verifying the delay characteristic of a relay, and a device for verifying the delay characteristic of a relay applying the method for verifying the delay characteristic of the relay. Background Art

[0002] General requirements (overload protection characteristics) for thermal overload relays and motor starters: stable for 2 hours without tripping at 1.05 times the rated current and tripping within 2 hours at 1.2 times the rated current. Therefore, when producing thermal overload relays and motor starters, a long-time power-on verification (more than 1 hour) is required to make the bimetallic strip thermally stable at the rated current, and then manually adjust the relative position point between the tripping point of the mechanism and the thermal bending of the double metal to match. Therefore, the current verification method has the disadvantages of low efficiency, great influence of human factors, and unstable qualification rate of adjustment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for verifying the delay characteristic of a double-metal switch, which is suitable for automatic operation, has a high verification qualification rate and high efficiency; also provide a method for verifying the action characteristic of a relay, which is suitable for automatic operation, has a high cross-verification qualification rate and high efficiency; also provide a system for verifying the action characteristic of a relay applying the method for verifying the action characteristic of the relay, realizing the automatic and rapid verification of the delay characteristic of the relay.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A method for verifying the delay characteristic of a double-metal switch, which includes the following operations:

[0006] Tripping stroke pre-adjustment operation: Adjust the tripping stroke of the double-metal switch by adjusting the relative position between the bimetallic strip and the transmission structure of the double-metal switch;

[0007] After the tripping point calibration operation and completing the pre-adjustment operation of the tripping stroke, calibrate the tripping point of the a current gear of the double-metal switch. The a current gear represents any one of the current gears of the double-metal switch: input the first calibration current into the main contact system of the double-metal switch and maintain it for the first set duration. The first calibration current is 2 - 6 times the rated current of the a current gear of the relay, and the first set duration is 10 - 120 s. Then, input the second calibration current into the main contact system of the double-metal switch and maintain it for the second set duration. The second calibration current is 1.05 - 1.2 times the rated current of the a current gear of the relay, and the second set duration is 1 - 60 s. At the end of the second set duration, start turning the adjusting cam used to adjust the current gear of the double-metal switch until the main contact system of the double-metal switch is disconnected or the auxiliary normally closed contact group is disconnected. During the process of turning the adjusting cam, keep inputting the second calibration current into the main contact system of the double-metal switch;

[0008] When the double-metal switch includes multiple current gears, repeat the tripping point calibration operation;

[0009] After the double-metal switch completes the first tripping point calibration operation, if the calibration result is unqualified, repeat the pre-adjustment operation of the tripping stroke, and then perform the tripping point calibration operation again.

[0010] Preferably, the adjusting cam is rotated by the cam adjusting motor. When the auxiliary normally closed contact system of the double-metal switch is disconnected by the rotation of the adjusting cam by the cam adjusting motor, the angle at which the cam adjusting motor is located is the calibration result. If the calibration result is within the qualified angle range, the calibration result is qualified; if the calibration result is not within the qualified angle range, the calibration result is unqualified.

[0011] A method for calibrating the delay characteristic of a relay, which includes the following operating steps:

[0012] Step 1, turn the adjusting screw of the relay to perform a primary pre-adjustment on the tripping stroke of the relay;

[0013] Step 2, includes the following sub-steps:

[0014] Step 21, calibrate the tripping point of the J a current gear of the relay. The J a current gear represents any one of the current gears of the relay: input the third calibration current into the main contact system of the relay and maintain it for the third set duration. The third calibration current is 2 - 6 times the rated current of the J a current gear, and the third set duration is 1 - 60 s. Then, input the fourth calibration current into the main contact system of the relay and maintain it for the fourth set duration. The fourth calibration current is the J a1.05 - 1.2 times the rated current of the current gear, the fourth set duration is 1 - 60 s; the adjusting cam of the relay is the first adjusting cam. At the end of the fourth set duration, start to turn the first adjusting cam until the auxiliary normally closed contact system of the relay is disconnected. During the process of turning the first adjusting cam, keep inputting the fourth verification current to the main contact system of the relay.

[0015] Step 22, the relay completes the first J a After the trip point verification of the current gear is completed, if the verification result is unqualified, turn the adjusting screw of the relay to perform a secondary pre - adjustment on the trip stroke of the relay, and then enter step 2; if the verification result is qualified, enter step 3.

[0016] Step 3 includes the following sub - steps:

[0017] Step 31, cool the relay.

[0018] Preferably, step 1 includes the following sub - steps:

[0019] Step 11, retrieve the corresponding debugging stroke parameter X according to the product status information of the relay.

[0020] Step 12, identify the status of the auxiliary contact system of the relay. The status of the auxiliary contact system includes the on - state of the auxiliary normally closed contact and the on - state of the auxiliary normally open contact.

[0021] Step 13, perform a primary pre - adjustment on the trip stroke of the relay according to the status of the auxiliary contact system and the debugging stroke parameter X.

[0022] Preferably, step 13 includes the following sub - steps:

[0023] Step 131, if the status of the auxiliary contact system of the relay is the on - state of the auxiliary normally closed contact, turn the adjusting screw in the first direction until the auxiliary normally closed contact system is disconnected, and then according to the debugging stroke parameter X, turn the adjusting screw n0 turns in the first direction or the second direction, where n0 = X / P, and P is the pitch of the adjusting screw; the first direction and the second direction are opposite to each other.

[0024] Step 132, if the status of the auxiliary contact system of the relay is the on - state of the auxiliary normally open contact, turn the adjusting screw in the second direction until the auxiliary normally closed contact system is connected to make the status of the auxiliary contact system switch to the on - state of the auxiliary normally closed contact, and then perform step 131.

[0025] Preferably, when the cam adjustment motor drives the first adjustment cam to rotate and the auxiliary normally closed contact system of the relay is disconnected, the angle at which the cam adjustment motor is located is the first angle, and the first angle is the calibration result. If the first angle is not within the qualified angle range, the calibration result is unqualified.

[0026] Preferably, the tripping stroke of the relay is pre-adjusted a second time according to the following formula:

[0027]

[0028] Where

[0029] Q is the number of turns of the adjusting screw to be screwed when the tripping stroke of the relay is pre-adjusted a second time; if Q is positive, the adjusting screw is screwed in the first direction, and if Q is negative, the adjusting screw is screwed in the second direction;

[0030] A is the first angle;

[0031] W is the tripping point angle value;

[0032] T is the lift of the adjusting cam;

[0033] P is the pitch of the adjusting screw.

[0034] Preferably, among the relays that have completed the first tripping point calibration, when the proportion of relays with unqualified calibration results exceeds the set limit, the corresponding debugging stroke parameter X is adjusted according to the calibration results of the unqualified relays.

[0035] Preferably, before performing step 1, the auxiliary contact performance of the auxiliary contact system of the relay is detected.

[0036] Preferably, steps 21 and 31 are repeated to complete the tripping point calibration of multiple current grades of the relay.

[0037] Preferably, step 3 further includes the following sub-steps: step 32, after the relay completes the first tripping point calibration and the calibration result is qualified, the corresponding current grade scale is marked on the first adjusting cam.

[0038] Preferably, it further includes step 4, detecting the auxiliary contact performance of the auxiliary contact system of the relay, and marking the remaining current grade scales on the first adjusting cam according to the calibration results of the tripping point calibration.

[0039] A relay delay characteristic calibration system applies the relay delay characteristic calibration method described above.

[0040] Preferably, the delay characteristic verification system of the relay includes a pre-detection / marking unit, a pre-adjustment unit, a verification / cooling subsystem, a current gear marking unit, and a terminal detection / marking unit; the verification / cooling subsystem includes at least one verification-cooling combination unit, and each verification-cooling combination unit includes a verification unit and a cooling unit. One or more verification-cooling combination units are provided between the pre-adjustment unit and the terminal detection / marking unit. The current gear marking unit is arranged between the verification unit and the cooling unit of the first verification-cooling combination unit or between the first verification-cooling combination unit and the second verification-cooling combination unit;

[0041] The pre-detection / marking unit detects the performance of the auxiliary contacts of the auxiliary contact system of the relay and marks a unique product status code for the relay before the first pre-adjustment of the tripping stroke of the relay; the pre-adjustment unit performs the first or second pre-adjustment of the tripping stroke of the relay; the verification unit verifies the tripping points of each current gear of the relay; the cooling unit cools the relay after the relay completes the verification of the tripping point once; the current gear marking unit marks the corresponding current gear on the first adjusting cam of the relay after the relay completes the first verification of the tripping point and the verification result is qualified; the terminal detection / marking unit marks the remaining current gear scales on the first adjusting cam according to the verification result after the relay completes the verification of the tripping point.

[0042] Preferably, it further includes a control unit that is communicatively connected to the pre-detection / marking unit, the pre-adjustment unit, the verification / cooling subsystem, the current gear marking unit, and the terminal detection / marking unit respectively; the product status information and the debugging stroke parameter X of the relay are stored in the control unit; the pre-adjustment unit reads the product status code of the relay to obtain the corresponding debugging stroke parameter from the control unit; the verification / cooling subsystem reads the product status code of the relay to obtain the product status information from the control unit, verifies the tripping point of the relay according to the product status information of the relay, and uploads the verification result to the control unit; the terminal detection / marking unit reads the product status code of the relay to obtain the verification result from the control unit, and marks the remaining current gear scales on the first adjusting cam according to the verification result.

[0043] Preferably, the pre-detection / marking unit includes a first feeding channel, a first loading mechanism, a first divider, an auxiliary contact performance detection mechanism for verifying the performance of the auxiliary contact system of the relay, a first marking mechanism for marking the product status code for the relay, a first discharging mechanism, and a first discharging channel; the first loading mechanism, the auxiliary contact performance detection mechanism, the first marking mechanism, and the first discharging mechanism are sequentially arranged on the outer peripheral side of the first divider; the first divider includes a first divider turntable and a plurality of first stations arranged on the first divider turntable for accommodating and fixing the relays; the first discharging channel is connected to the verification / cooling subsystem.

[0044] Preferably, the pre-detection and marking unit further includes a verification code reading device for verifying whether the product status code can be read normally.

[0045] Preferably, the first discharging channel includes a first qualified product discharging channel and a first unqualified product discharging channel, and the first qualified product discharging channel is connected to the verification / cooling subsystem.

[0046] Preferably, the pre-adjustment unit includes a second code reading device for reading the product status code of the relay to obtain the corresponding debugging stroke parameter X from the control unit, an auxiliary electrode group for cooperating with the auxiliary contact system of the relay, a pre-adjustment mechanism for drivingly cooperating with the adjusting screw of the relay, a second feeding channel connected to the first discharging channel of the pre-detection / marking unit, a second discharging channel for connecting to the verification / cooling subsystem, a second loading mechanism for placing the relay in place for primary pre-adjustment or secondary pre-adjustment, and a second discharging mechanism for discharging the relay that has completed primary pre-adjustment or secondary pre-adjustment to the second discharging channel.

[0047] Preferably, the verification unit includes a verification unit feeding channel, a verification unit discharging channel, a verification unit code reading device, a power supply shifting device, a verification unit loading / unloading mechanism, and a verification mechanism; the verification unit code reading device reads the product status code of the relay to obtain the product status information of the relay from the control unit, the power supply shifting device switches the power supply according to the product status information of the relay and inputs a preset current to the relay through the verification mechanism and maintains it for a preset duration, the verification mechanism completes the verification of the tripping points of each current gear by screwing the first adjusting cam of the relay, and the verification unit loading / unloading mechanism is used to load the relay to be verified from the verification unit feeding channel to the verification mechanism and unload the verified relay from the verification mechanism to the verification unit discharging channel.

[0048] Preferably, the verification unit discharging channel includes a verification unit qualified product discharging channel and a verification unit unqualified product discharging channel.

[0049] Preferably, the calibration mechanism includes a calibration mechanism base, and a first pressing mechanism, a second pressing mechanism, a third pressing mechanism and a cam adjustment mechanism respectively arranged on the calibration mechanism base; the first pressing mechanism and the second pressing mechanism are arranged oppositely, and a calibration station for placing the relay to be calibrated is provided between the first pressing mechanism and the second pressing mechanism. The first pressing mechanism and the second pressing mechanism press the relay from opposite sides of the relay, and the third pressing mechanism presses the relay to be calibrated from the side opposite to the calibration mechanism base; the second pressing mechanism includes a main electrode group and an auxiliary electrode group of the calibration mechanism, which are electrically connected to the main contact system and the auxiliary contact system of the relay to be calibrated respectively. The cam adjustment mechanism is in driving cooperation with the first adjustment cam of the relay and is used to screw the first adjustment cam. The cam adjustment mechanism includes a cam adjustment driving structure, a cam adjustment motor and a cam screwdriver. One end of the cam screwdriver is connected to the output shaft of the cam adjustment motor, and the other end is in driving cooperation with the first adjustment cam. The cam adjustment motor is arranged on the cam adjustment driving structure, and the cam adjustment driving structure moves to drive the cam screwdriver to move towards or away from the first adjustment cam.

[0050] Preferably, the terminal detection and marking unit detects the auxiliary contact performance of the auxiliary contact system of the relay again after the relay completes the tripping point calibration. It includes a terminal feeding channel, a terminal feeding mechanism, a terminal divider, a terminal auxiliary contact performance detection mechanism, a terminal discharging mechanism, a terminal code reading device, a terminal marking mechanism and a terminal discharging channel. The terminal feeding channel, the terminal auxiliary contact performance detection mechanism, the terminal code reading device and the terminal marking mechanism are sequentially arranged on the circumferential outer side of the terminal divider. The terminal feeding channel is connected to the calibration / cooling subsystem. The terminal divider includes a terminal divider turntable and a plurality of terminal stations arranged on the terminal divider turntable. The terminal divider turntable rotates to drive the plurality of terminal stations to rotate in a cycle; the terminal feeding mechanism feeds the relay from the terminal feeding channel into the terminal station, the terminal auxiliary contact performance detection mechanism detects the auxiliary contact performance of the auxiliary contact system of the relay, the terminal code reading device reads the product status code of the relay to obtain the calibration result and product status information from the control unit, the terminal marking mechanism marks the remaining current gear scales for the first adjustment cam of the relay, and the terminal discharging mechanism is used to discharge the relay from the terminal station to the terminal discharging channel.

[0051] The automatic and rapid calibration method for the delay characteristic of the double-metal switch of the present invention can realize the automatic and rapid equivalent calibration of the delay characteristic of the double-metal switch, is suitable for automatic operation, and improves the calibration efficiency and qualification rate of the delay characteristic of the double-metal switch.

[0052] The calibration method for the delay characteristic of the relay of the present invention can realize the automatic and rapid equivalent calibration of the delay characteristic of the relay, is suitable for automatic and intelligent detection, and has high tripping point calibration efficiency and high qualification rate for the relay.

[0053] The time-delay characteristic verification system of the relay of the present invention, applying the time-delay characteristic verification method of the relay, can achieve automatic and rapid equivalent verification of the time-delay characteristic of the relay, with a high verification pass rate, reducing or avoiding the influence of human factors on the verification process, and improving the verification efficiency of the relay; moreover, the time-delay characteristic verification system of the relay of the present invention can meet the verification requirements of relays with different rated current grades by increasing or decreasing the number of tripping point verification units and cooling units. Description of the Drawings

[0054] Figure 1 is a schematic structural diagram of the time-delay characteristic verification system of the relay of the present invention;

[0055] Figure 2 is a schematic structural diagram of the pre-detection / marking unit of the present invention;

[0056] Figure 3 is a schematic structural diagram of the relay of the present invention;

[0057] Figure 4 is a schematic structural diagram of the verification unit of the present invention;

[0058] Figure 5 is a schematic structural diagram of the verification mechanism of the present invention;

[0059] Figure 6 is a schematic structural diagram of the cooling unit of the present invention;

[0060] Figure 7 is another schematic structural diagram of the cooling unit of the present invention;

[0061] Figure 8 is a schematic structural diagram of the terminal detection / marking unit of the present invention;

[0062] Figure 9a is a schematic side projection structural diagram of the relay of the present invention, showing the first adjustment cam without marked current grade scales;

[0063] Figure 9b is a schematic side projection structural diagram of the relay of the present invention, showing the first adjustment cam marked with the 2.5A current grade scale;

[0064] Figure 9c is a schematic side projection structural diagram of the relay of the present invention, showing the first adjustment cam marked with the 2.5A, 2.0A and 1.6A current grade scales. Detailed Embodiments

[0065] The following is combined with the attached Figure 1The embodiments given in FIGS. -8 further illustrate the specific implementation manners of the method for verifying the delay characteristics of the bimetal switch, the method for verifying the delay characteristics of the relay, and the system of the present invention. The method for verifying the delay characteristics of the bimetal switch, the method for verifying the delay characteristics of the relay, and the system of the present invention are not limited to the descriptions of the following embodiments.

[0066] The present invention discloses a method for verifying the delay characteristics of a bimetal switch, which includes the following operations:

[0067] Trip travel pre-adjustment operation: Adjust the trip travel of the bimetal switch by adjusting the relative position between the bimetal sheet and the transmission structure of the bimetal switch. It should be noted that the transmission structure refers to the structure for transmitting the driving force generated by the thermal deformation of the bimetal sheet; for example, the tripping member of the operating mechanism, the bimetal sheet is thermally deformed to push the tripping member to act, causing the operating mechanism to trip, and the tripping of the operating mechanism causes the main contact system of the bimetal switch to disconnect (such as a motor starter, etc.) or the auxiliary normally closed contact group of the bimetal switch to disconnect (such as a thermal overload relay, etc.).

[0068] Trip point verification operation. After completing the trip travel pre-adjustment operation, verify the trip point of the a current gear of the bimetal switch. The a current gear represents any current gear of the bimetal switch: Input a first verification current to the main contact system of the bimetal switch and maintain it for a first set duration. The first verification current is 2 - 6 times the rated current of the a current gear of the relay, and the first set duration is 10 - 120 s. Then input a second verification current to the main contact system of the bimetal switch and maintain it for a second set duration. The second verification current is 1.05 - 1.2 times the rated current of the a current gear of the relay, and the second set duration is 1 - 60 s; at the end of the second set duration, start turning the adjustment cam for adjusting the current gear of the bimetal switch until the main contact system of the bimetal switch disconnects or the auxiliary normally closed contact group disconnects. During the process of turning the adjustment cam, keep inputting the second verification current to the main contact system. It should be noted that the first set duration and the second set duration are related to factors such as the structure of the heating component, power, bimetal ratio bending, and the overall structure of the product. The specific values are obtained through the analysis and statistics of experimental data.

[0069] Preferably, for the method for verifying the delay characteristics of the bimetal switch of the present invention, when the cam adjustment motor drives the adjustment cam to rotate and the auxiliary normally closed contact system of the bimetal switch disconnects, the angle at which the cam adjustment motor is located is the verification result. If the verification result is within the qualified angle range, the verification result is qualified; if the verification result is not within the qualified angle range, the verification result is unqualified.

[0070] When the double-metal switch includes multiple current grades, the tripping point verification operation can be repeated. That is to say, by repeating the tripping point verification operation, the verification of the tripping points of all current grades of the double-metal switch or the verification of the tripping points of some specific current grades can be achieved (for example, when the thermal overload relay includes multiple current grades, only the tripping points of the two current grades at both ends need to be verified).

[0071] After the double-metal switch completes the first tripping point verification operation, if the verification result is unqualified, the tripping stroke pre-adjustment operation is repeated, and then the tripping point verification operation is performed again.

[0072] In the delay characteristic odd parity check method of the double-metal switch of the present invention, the tripping stroke pre-adjustment operation and the tripping point verification operation are carried out step by step, making the method of the present invention more suitable for automation; and by inputting current to the main contact system of the double-metal switch in a gradient manner, the first verification current causes a rapid impact on the bimetal of the double-metal switch, and then the second verification current forms a stable effect on the bimetal of the double-metal switch, thereby improving the efficiency of the tripping point verification while ensuring the accuracy of the tripping point verification. In addition, in the method of the present invention, the cam adjustment motor is used to adjust the adjusting cam, ensuring the timeliness and consistency of the adjustment process, which is beneficial to improving the accuracy of the tripping point verification.

[0073] The present invention also discloses a method for verifying the delay characteristic of a relay.

[0074] The method for verifying the delay characteristic of the relay of the present invention includes the following operation steps:

[0075] Step 1, turn the adjusting screw 100s of the relay to pre-adjust the tripping stroke of the relay once.

[0076] Preferably, step 1 includes the following sub-steps:

[0077] Step 11, retrieve the corresponding debugging stroke parameter X according to the product status information of the relay.

[0078] Preferably, the product status information includes the production line number, production date, product specification, and product serial number (the product serial number can be a digital serial number, a letter serial number, or a combination serial number of numbers and letters).

[0079] Step 12, identify the status of the auxiliary contact system of the relay, and the status of the auxiliary contact system includes the closed state of the auxiliary normally closed contact and the closed state of the auxiliary normally open contact.

[0080] Step 13, pre-adjust the tripping stroke of the relay according to the status of the auxiliary contact system and the debugging stroke parameter X.

[0081] Preferably, step 13 includes the following sub-steps:

[0082] Step 131, if the state of the auxiliary contact system of the relay is the state where the auxiliary normally closed contacts are connected, then turn the adjusting screw in the first direction until the auxiliary normally closed contact system 100c is disconnected, and then, according to the debugging travel parameter X, turn the adjusting screw n0 turns in the first direction or the second direction, where n0 = X / P and P is the pitch of the adjusting screw; the first direction and the second direction are opposite to each other.

[0083] Step 132, if the state of the auxiliary contact system of the relay is the state where the auxiliary normally open contacts are connected, then turn the adjusting screw in the second direction until the auxiliary normally closed contact system 100c is connected to switch the state of the auxiliary contact system to the state where the auxiliary normally closed contacts are connected, and then perform Step 131.

[0084] Preferably, the first direction is the counterclockwise direction and the second direction is the clockwise direction.

[0085] As Figure 3 shown, the adjusting screw 100s of the relay cooperates with the bimetal, and by turning the adjusting screw 100, the tripping travel of the relay can be pre-adjusted, that is, the relative position of the bimetal and its corresponding transmission structure is adjusted.

[0086] Step 2 includes the following sub-steps:

[0087] Step 21, check the tripping point of the J a current gear of the relay, where the J a current gear is any one of the current gears of the relay: input a third verification current to the main contact system of the relay and maintain it for a third set duration. The third verification current is 2 - 6 times the rated current of the J a current gear, and the third set duration is 10 - 120 s. Then input a fourth verification current to the main contact system of the relay and maintain it for a fourth set duration. The fourth verification current is 1.05 - 1.2 times the rated current of the J a current gear, and the fourth set duration is 1 - 60 s. The adjusting cam of the relay is the first adjusting cam 100cam. At the end of the fourth set duration, start turning the first adjusting cam 100cam until the auxiliary normally closed contact system 100c of the relay is disconnected. During the process of turning the adjusting cam 100cam, maintain inputting the fourth verification current to the main contact system of the relay. Further, the first verification current can be split into multi-gradient currents and input to the relay in sequence, and the holding duration of the first verification current is still the first set duration. For example, the heat generation of the bimetal has the following relationship with current, energization duration, and resistance: heat generation = (current) 2× Resistance × Power-on Duration. Therefore, under the same conditions, the higher the current multiple, the shorter the maintained time. According to the above principle, the first verification current can be split into multiple gradients of currents that decrease in sequence, and the respectively maintained times increase in sequence.

[0088] Preferably, for the method for verifying the delay characteristic of the relay of the present invention, when the cam adjustment motor drives the first adjustment cam 100cam to rotate and the auxiliary normally closed contact system 100c of the relay is disconnected, the angle at which the cam adjustment motor is located is the first angle A, and the first angle A is the verification result. If the first angle A is not within the qualified angle range, the verification result is unqualified. The qualified angle range varies according to the designs of different products. For example, it can be 100° - 180° or 150° - 230°. Further, the qualified angle range can be divided into multiple angle range gears in gradients. The relays with qualified verification are counted according to different angle range gears, and the proportion of relays within each angle range gear is calculated. For example, when the qualified angle range is 30° - 60°, and the qualified angle range is divided into three angle range gears, it can be 30° - 40° as one gear, 41° - 50° as one gear, and 51° - 60° as one gear. Of course, the range of each gear can be adjusted according to actual needs. It should be noted that the tripping point positions of each current gear of the relay can also be recorded through visual inspection, such as CCD inspection.

[0089] Preferably, after the proportion of relays with unqualified verification results among the relays that have completed the first tripping point verification exceeds the set limit, the corresponding debugging stroke parameter X is adjusted according to the verification results of the relays with unqualified verification. Further, the set limit is 5% - 15%. Further, the set limit is 6%, 8%, 10% or 12%. Further, when the verification result of the first tripping point verification of the relay is less than the lower limit of the qualified angle range, the corresponding debugging stroke parameter X of the relay is lowered by 5 - 15% (preferably 10%). When the verification result of the first tripping point verification of the relay is greater than the upper limit of the qualified angle range, the corresponding debugging stroke parameter X of the relay is raised by 5 - 15% (preferably 10%). The debugging stroke parameter X is a dynamic value, which is initially set manually based on theoretical calculations and product measured values. Its value is related to factors such as the double-metal characteristics of the product, the resistance value of the thermal element, the tripping force, and the system friction. The best value of the debugging stroke parameter X can be determined by actually measuring the debugging stroke parameter X of the product that has passed the standard long-delay verification and then combining the theoretical calculation value. The value of the debugging stroke parameter X can be adjusted according to the verification results of the first tripping point verification of the product. Different current specifications of products correspond to different debugging stroke parameters X, and it is also possible that individual different specification products use the same debugging stroke parameter X.

[0090] Step 22, after the relay completes the first J a After the current gear trip point verification, if the verification result is unqualified, turn the adjustment screw of the relay for 100 s to perform secondary pre-adjustment on the trip stroke of the relay, and then enter Step 2; if the verification result is qualified, enter Step 3.

[0091] Preferably, the following formula is used to perform secondary pre-adjustment on the trip stroke of the relay (the relay with unqualified verification result of the first trip point verification):

[0092]

[0093] Wherein,

[0094] Q is the number of turns to turn the adjustment screw for 100 s when performing secondary pre-adjustment on the trip stroke of the relay; if Q is a positive value, turn the adjustment screw for 100 s in the first direction, and if Q is a negative value, turn the adjustment screw for 100 s in the second direction; A is the first angle; W is the trip point angle value; T is the lifting amount of the adjustment cam, which is the product design dimension; P is the pitch of the adjustment screw for 100 s.

[0095] Preferably, W is determined by the design adjustment margin of the relay itself; for example, if the adjustment margin of the relay is 300°, and the included angle between the maximum and minimum current gears of the 2.5 A specification relay is 180°, then the adjustment margin is 300° - 180° = 120°; in the method of the present invention, W is preferably 50°.

[0096] Step 3 includes the following sub-steps:

[0097] Step 31, cool the relay.

[0098] It should be noted that when the relay includes multiple current gears, the trip points of each current gear of the relay are verified by repeating Step 21 and Step 31, or the trip points of specific current gears of the relay are verified (for example, the trip point verification of the maximum and minimum current gears of the relay). Further, when the relay needs to verify multiple current gears, it is preferable to verify the trip points of each current gear in the order of the size of the current gears, which is beneficial to improving the qualification rate of the verification result; for example, the relay includes three current gears of J1A, J2A, and J3A, J1 > J2 > J3. If the trip points of the three current gears are verified, the trip points of the three current gears are verified according to J1A, J2A, and J3A respectively. If only the trip points of the maximum and minimum current gears need to be verified, first verify the trip point of the J1A current gear, and then verify the trip point of the J3A current gear.

[0099] Preferably, in the method for verifying the time-delay characteristic of the relay of the present invention, before performing step 1, the auxiliary contact performance of the auxiliary contact system of the relay is detected. Further, the auxiliary contact performance of the auxiliary contact system of the relay refers to the power-on performance of the auxiliary contact system pair, such as whether the auxiliary contact system can be normally connected and disconnected, the contact resistance of the auxiliary contact system, etc. It is necessary to ensure that the auxiliary contact performance of the relay is good to ensure the normal progress of the subsequent steps; if the auxiliary contact performance of the relay is qualified, it enters the next process, otherwise it is classified as a defective product.

[0100] Specifically, the auxiliary contact performance of the auxiliary contact system of the relay is verified through the following operation steps: a. Detect the state of the auxiliary normally closed contact system. If it is conductive, it is qualified; if it is not conductive, it is unqualified; b. Press and hold the test button. If the auxiliary normally closed contact system becomes non-conductive and the auxiliary normally open contact system becomes conductive, it is qualified, otherwise it is unqualified; c. Release the test button. If the auxiliary normally closed contact system resumes conduction and the auxiliary normally open contact resumes disconnection, it is qualified, otherwise it is unqualified;

[0101] Preferably, the method for verifying the time-delay characteristic of the relay of the present invention, step 3 further includes the following sub-steps: Step 32, after the relay completes the first release point verification and the verification result is qualified, mark the corresponding current gear scale on the first adjustment cam 100cam. Further, in step 32, first position the relay, and then mark the corresponding current gear scale on the first adjustment cam 100cam. In step 32, marking the release point position obtained from the first release point verification on the first adjustment cam 100cam is beneficial to improving the accuracy and efficiency of the current gear scale marking.

[0102] Preferably, the method for verifying the time-delay characteristic of the relay of the present invention further includes step 4, detecting the auxiliary contact performance of the auxiliary contact system of the relay, and marking the remaining current gear scales on the first adjustment cam 100cam according to the verification result of the release point verification. Further, in step 4, position the relay in the same manner as in step 32, and then mark the remaining current gear scales on the first adjustment cam 100cam to improve the consistency and accuracy of the scale marking positions.

[0103] It should be noted that a right-angle positioning method can be adopted, and the product is pressed against the positioning by the elastic sheet extrusion according to the same reference plane to ensure that the marking positions of different products and different current gears are consistent; or, a cylinder, a motor, etc. can also be used to press and position the product.

[0104] In addition, for the method of verifying the delay characteristic of the relay of the present invention, the current gear scale markings can also be made after all the current gear trip point verifications of the relay are completed. That is, instead of marking the current gear markings for the first adjusting cam 100cam in step 3, all the current gear scales are marked in step 4 according to the verification results.

[0105] Preferably, for the method of verifying the delay characteristic of the relay of the present invention, after two adjacent trip point verifications, the difference between the two verification results is calculated and compared with the qualified range of the difference. If the difference between the two verification results is within the qualified range of the difference, the relay proceeds to the subsequent steps; otherwise, the relay is classified as a defective product. The qualified range of the insertion varies depending on the specifications of the product and is set by the operator based on statistical data and experience.

[0106] The present invention also discloses a relay delay characteristic verification system applying the relay delay characteristic verification method.

[0107] Such as Figure 1As shown in Figures -2, 4-8, the time-delay characteristic verification system of the relay of the present invention includes a pre-detection / marking unit, a pre-adjustment unit, a verification / cooling subsystem, a current gear marking unit, and a terminal detection / marking unit; the verification / cooling subsystem includes at least one verification-cooling combination unit, each verification-cooling combination unit includes a verification unit and a cooling unit, one or more verification-cooling combination units are provided between the pre-adjustment unit and the terminal detection / marking unit, and the current gear marking unit is arranged between the verification unit and the cooling unit of the first verification-cooling combination unit or between the first verification-cooling combination unit and the second verification-cooling combination unit; the pre-detection / marking unit, before performing a first pre-adjustment on the tripping stroke of the relay, detects the performance of the auxiliary contacts of the auxiliary contact system of the relay and marks a unique product status code for the relay; the pre-adjustment unit performs a first pre-adjustment or a second pre-adjustment on the tripping stroke of the relay; the verification unit verifies the tripping points of each current gear of the relay; the cooling unit cools the relay after it completes a tripping point verification; the current gear marking unit marks the corresponding current gear on the first adjusting cam 100cam after the relay completes the first tripping point verification and the verification result is qualified; the terminal detection / marking unit marks the remaining current gear scales on the first adjusting cam 100cam according to the verification result after the relay completes the tripping point verification. Further, the time-delay characteristic verification system of the relay of the present invention further includes a control unit that is communicatively connected to the pre-detection / marking unit, the pre-adjustment unit, the verification / cooling subsystem, the current gear marking unit, and the terminal detection / marking unit respectively; product status information and debugging stroke parameter X of the relay are stored in the control unit; the pre-adjustment unit reads the product status code of the relay to obtain the corresponding debugging stroke parameter from the control unit; the verification / cooling subsystem reads the product status code of the relay to obtain the product status information from the control unit, verifies the tripping points of the relay according to the product status information of the relay, and uploads the verification result to the control unit; the terminal detection / marking unit reads the product status code of the relay to obtain the verification result from the control unit, and marks the remaining current gear scales on the first adjusting cam 100cam according to the verification result.

[0108] It should be noted that the number of verification-cooling combination units included in the verification / cooling subsystem is the same as the number of current gears to be verified for the product to be verified.

[0109] The time-delay characteristic verification system of the relay of the present invention applies the time-delay characteristic verification method of the relay, realizes the automatic verification of the tripping points of each current gear of the relay, improves the verification efficiency, and ensures the accuracy and consistency of the verification result; moreover, each relay has a unique product status code, making the whole process of the tripping point verification process of the relay traceable.

[0110] Preferably, the control system is a host computer.

[0111] As Figure 2 shown, it is an embodiment of the pre-detection / marking unit.

[0112] The pre-detection / marking unit includes a first feeding channel 1-0, a first loading mechanism 1-1, a first divider 1-2, an auxiliary contact performance detection mechanism 1-3 for verifying the auxiliary contact performance of the auxiliary contact system of the relay, a first marking mechanism 1-4 for marking the product status code on the relay, a first discharging mechanism 1-6 and a first discharging channel; the first loading mechanism 1-1, the auxiliary contact performance detection mechanism 1-3, the first marking mechanism 1-4, and the first discharging mechanism 1-6 are sequentially arranged on the outer peripheral side of the first divider 1-2; the first divider 1-2 includes a first divider turntable and a plurality of first workstations arranged on the first divider turntable for accommodating and fixing the relays; the first discharging channel is connected to the verification / cooling subsystem (the first discharging channel is preferably connected to the first verification cooling combination unit of the verification / cooling subsystem).

[0113] The first marking mechanism 1-4 can automatically generate a product status code according to the product status information of the relay and mark the product status code on the relay. The first marking mechanism 1-4 is preferably a laser marking machine. As other embodiments, the first marking mechanism 1-4 can also be a pad printing device, a label pasting device or a spraying device. It should be noted that the product information corresponding to the relay can be input into the first marking mechanism 1-4 through manual setting, such as manual import; or, the first marking mechanism 1-4 can also obtain the product information corresponding to the relay from the host computer.

[0114] Preferably, as Figure 2 shown, the pre-detection / marking unit further includes a verification code reading device 1-5 for reading and verifying the product status code of the relay. Further, as Figure 2 shown, the first discharging channel includes a first qualified product channel 1-7 and a first unqualified product channel 1-8. The relays with the product status code that can be successfully read and the auxiliary contact performance qualified are discharged by the first discharging mechanism 1-6 to the first qualified product channel 1-7, and the relays with the product status code that cannot be read and / or the auxiliary contact performance unqualified are discharged by the first discharging mechanism 1-6 to the first unqualified product channel 1-8.

[0115] Preferably, as Figure 2As shown, the first feeding mechanism 1-1 and the first discharging mechanism 1-6 are both jaw-type devices, each including a jaw for gripping a relay, a power structure for driving the jaw to move, and a track structure for guiding the jaw. These structures can all be realized by existing technologies and will not be described in detail here.

[0116] The following is an embodiment of the pre-adjustment unit.

[0117] The pre-adjustment unit includes a second code-reading device for reading the product status code of the relay to obtain the corresponding debugging stroke parameter X from the control unit, an auxiliary electrode group for cooperating with the auxiliary contact system of the relay, a pre-adjustment mechanism for drivingly cooperating with the adjusting screw 100s of the relay, a second feeding channel connected to the first discharging channel of the pre-detection / marking unit, a second discharging channel for connecting to the verification / cooling subsystem, a second feeding mechanism for placing the relay in place for primary or secondary pre-adjustment, and a second discharging mechanism for discharging the relay that has completed primary or secondary pre-adjustment to the second discharging channel. Further, the pre-adjustment mechanism includes a pre-adjustment motor and a pre-adjustment screwdriver. One end of the pre-adjustment screwdriver is drivingly connected to the output shaft of the pre-adjustment motor, and the other end is drivingly cooperated with the adjusting screw 100s of the relay to screw the adjusting screw 100s.

[0118] It should be noted that the second code-reading device reads the product status code of the relay to obtain the corresponding product information, and obtains the corresponding pre-stored debugging stroke parameter X from the control unit / host computer according to the product information (mainly product specifications); alternatively, the debugging stroke parameter X corresponding to the relay can also be stored in the control part of the pre-adjustment unit (such as a PLC control mechanism / structure).

[0119] As Figure 4 shown, it is an embodiment of the verification unit.

[0120] The verification unit includes a verification unit feeding channel 3-0, a verification unit discharging channel, a verification unit code-reading device 3-1, a power supply shifting device 3-4, a verification unit loading / unloading mechanism 3-2, and a verification mechanism 3-3; the verification unit code-reading device 3-1 reads the product status code of the relay to obtain the product status information of the relay from the control unit, and the power supply shifting device 3-4 switches the power supply according to the product status information of the relay and inputs a preset current to the relay through the verification mechanism 3-3 and maintains it for a preset duration. The verification mechanism 3-3 completes the verification of the tripping points of each current gear by screwing the first adjusting cam 100cam of the relay. The verification unit loading / unloading mechanism 3-2 is used to load the relay to be verified from the verification unit feeding channel 3-0 to the verification mechanism 3-3 and unload the verified relay from the verification mechanism 3-3 to the verification unit discharging channel. Further, as Figure 4As shown, the discharge channels of the verification unit include the qualified product discharge channel 3-50 and the unqualified product discharge channel 3-51 of the verification unit.

[0121] The power supply shifting device 3-4 switches different output power supplies according to the specifications of the relay. For example, the power supply shifting device 3-4 is equipped with at least two sets of power supplies. One is the No. 1 power supply with a current range of 0-40A, and the other is the No. 2 power supply with a current range above 40A.

[0122] It should be noted that if the verification unit of the first verification / cooling combination unit of the verification / cooling subsystem is the verification unit for verifying the tripping point of the first current gear of the relay, then the qualified product discharge channel 3-50 of its verification unit will transfer the qualified products to the next process, and the unqualified product discharge channel 3-51 of the verification unit will transfer the unqualified products to the pre-adjustment unit for secondary pre-adjustment of the unqualified products. The qualified product discharge channels 3-50 of other verification units will transfer the qualified products to the next process, and the unqualified product discharge channels 3-51 of the verification units will transfer the unqualified products to the corresponding concentration points.

[0123] As Figure 5 shown, it is an embodiment of the verification mechanism 3-3.

[0124] The verification mechanism includes a verification mechanism base 3-30, and a first pressing mechanism, a second pressing mechanism 3-33, a third pressing mechanism 3-38 and a cam adjustment mechanism 3-37 respectively arranged on the verification mechanism base 3-30. The first pressing mechanism and the second pressing mechanism 3-33 are arranged oppositely, and a verification station for placing the relay to be verified is provided between the first pressing mechanism and the second pressing mechanism 3-33. The first pressing mechanism and the second pressing mechanism 3-33 press the relay from opposite sides of the relay, and the third pressing mechanism 3-38 presses the relay to be verified from the side opposite to the verification mechanism base 3-30. The second pressing mechanism 3-33 includes a main electrode group 3-332 and an auxiliary electrode group 3-333 of the verification mechanism, which are electrically connected to the main contact system and the auxiliary contact system of the relay to be verified respectively. The cam adjustment mechanism 3-37 is in driving cooperation with the first adjustment cam 100cam of the relay for screwing the first adjustment cam 100cam. Further, the cam adjustment mechanism 3-37 includes a cam adjustment driving structure 3-372, a cam adjustment motor 3-371 and a cam screwdriver 3-370. One end of the cam screwdriver 3-370 is connected to the output shaft of the cam adjustment motor 3-371, and the other end is in driving cooperation with the first adjustment cam 100cam. The cam adjustment motor 3-371 is arranged on the cam adjustment driving structure 3-372, and the movement of the cam adjustment driving structure 3-372 drives the cam screwdriver 3-370 to move towards or away from the first adjustment cam 100cam.

[0125] Preferably, as Figure 5 shown, the first pressing mechanism includes a first pressing cylinder 3-31 and a first positioning structure 3-32 for defining the stroke of the first pressing cylinder 3-31.

[0126] Preferably, as Figure 5 shown, the second pressing mechanism 3-33 further includes a second pressing cylinder 3-330, and the main electrode group 3-332 and the auxiliary electrode group 3-333 of the calibration mechanism are respectively driven and connected to the second pressing cylinder 3-330. Further, as Figure 5 shown, the second pressing mechanism 3-333 further includes a second positioning structure 3-331 for defining the stroke of the second pressing cylinder 3-330.

[0127] The first positioning structure 3-32 and the second positioning structure 3-331 cooperate to prevent the relay from being squeezed and deformed or damaged by the first pressing mechanism and the second pressing mechanism 3-33, and ensure that the main electrode group 3-332 and the auxiliary electrode group 3-333 of the calibration mechanism are respectively in place in cooperation with the main contact system and the auxiliary contact system of the relay.

[0128] Preferably, as Figure 5 shown, both the main electrode group 3-332 and the auxiliary electrode group 3-333 of the calibration mechanism include a plurality of electrode assemblies arranged side by side. Each electrode assembly includes an electrode rod and an electrode rod return spring. The electrode rod is movably inserted on the second pressing cylinder 3-330, and the electrode rod return spring is sleeved on the electrode rod to prevent the electrode rod from making hard contact with the contact of the relay and damaging the relay. Further, the second positioning structure 3-331 is a positioning pin, and the main electrode group 3-332 of the calibration mechanism passes through the positioning pin and then cooperates with the main contact system of the relay.

[0129] Preferably, as Figure 5 shown, the cam adjustment mechanism 3-37 further includes a position detection structure 3-372 for detecting whether the cam screwdriver 3-370 is aligned with and inserted into the operation slot of the adjustment cam 100cam. The position detection mechanism 3-372 is preferably a photoelectric induction device.

[0130] Preferably, as Figure 4 shown, the calibration unit loading / unloading mechanism 3-2 is implemented in the form of a robotic arm + gripper, with high flexibility and can meet the loading and unloading requirements of multiple calibration mechanisms 3-3.

[0131] It should be noted that the calibration unit can be used alone to calibrate the rated current tripping points of different gears of the relay. When the calibration unit is used alone, the feeding channel 3-0 of the calibration unit, the discharging channel of the calibration unit, the loading / unloading mechanism 3-2 of the calibration unit, and the code reading device 3-1 of the calibration unit can be selectively set.

[0132] As Figure 1 shown, the current gear marking unit is arranged between the calibration unit and the cooling unit of the first calibration-cooling combined unit of the calibration / cooling subsystem, and the current gear marking unit is preferably located at the entrance of the cooling unit. As another embodiment, the current gear marking unit can also be arranged between the first and second calibration-cooling combined units of the calibration / cooling subsystem, and the current gear marking unit is preferably located at the outlet of the cooling unit of the first calibration-cooling combined unit.

[0133] Preferably, the current gear marking unit is a laser printing device, a pad printing device, a label pasting device or a spraying device.

[0134] It should be noted that the calibration unit includes a calibration unit control mechanism, and the calibration unit control mechanism includes a PLC control chip, which controls the power supply shifting device 3-4 to switch the power supply (the first set current and the second set current), the time for the power supply shifting device 3-4 to output the current (the first set duration and the second set duration), and the action process of the calibration mechanism 3-3.

[0135] As Figure 6 and 7 shown, it is an embodiment of the cooling unit.

[0136] The cooling unit includes a cooling tower frame 4-..., a cooling tower conveyor belt 4-1 arranged in the cooling tower frame 4-0, a plurality of storage baskets 4-4 for storing relays distributed on the cooling tower conveyor belt 4-1, a cooling tower driving structure 4-2 drivingly cooperating with the cooling tower conveyor belt 4-1 to drive the cooling tower conveyor belt 4-1 to circulate and rotate in the cooling tower frame 4-0, and a cooling tower loading / unloading mechanism 4-3 for putting the relay into and taking out of the storage basket 4-4; each time the cooling tower loading / unloading mechanism 4-3 acts, it first takes out the relay in the storage basket 4-4 at the waiting station to enter the fifth unit, then puts the cooled relay into the storage basket 4-4, and then the cooling tower conveyor belt 4-1 takes a step and brings another storage basket 4-4 into the waiting station.

[0137] As Figure 8 shown, it is an embodiment of the terminal detection / marking unit.

[0138] The terminal detection and marking unit detects the auxiliary contact performance of the auxiliary contact system of the relay again after the relay completes the trip point calibration. It includes a terminal feeding channel 7-0, a terminal feeding mechanism 7-1, a terminal divider 7-2, a terminal auxiliary contact performance detection mechanism 7-7, a terminal unloading mechanism 7-3, a terminal code reading device 7-4, a terminal marking mechanism 7-5 and a terminal unloading channel. The terminal feeding channel 7-0, the terminal auxiliary contact performance detection mechanism 7-7, the terminal code reading device 7-4, and the terminal marking mechanism 7-5 are sequentially arranged on the outer side of the circumference of the terminal divider 7-2. The terminal feeding channel 7-0 is connected to the calibration / cooling subsystem. The terminal divider 7-2 includes a terminal The divider turntable and multiple terminal stations arranged on the terminal divider turntable, the terminal divider turntable rotates to drive the multiple terminal stations to rotate in a cycle; the terminal loading mechanism 7-1 loads the relay from the terminal loading channel 7-0 to the terminal station, the terminal auxiliary contact performance detection mechanism 7-7 detects the auxiliary contact performance of the auxiliary contact system of the relay, the terminal code reading device 7-4 reads the product status code of the relay to obtain the verification result and product status information from the control unit, the terminal marking mechanism 7-5 marks the remaining current gear scales for the first adjustment cam 100cam of the relay, and the terminal unloading mechanism 7-3 is used to unload the relay from the terminal station to the terminal discharge channel.

[0139] like Figure 8 As shown, the terminal divider 7-2 includes four terminal workstations uniformly distributed on the terminal divider turntable along the circumference thereof.

[0140] like Figure 8 As shown, the terminal unloading channel includes a terminal qualified product discharge channel for carrying and conveying qualified products, and a terminal defective product discharge channel for carrying defective products. Furthermore, the terminal defective product discharge channel includes multiple channels arranged side by side, each channel corresponding to a type of defective product; the terminal defective product discharge channel includes a channel for carrying and conveying relays with unqualified auxiliary contact performance, a channel for carrying and conveying relays with unqualified current gear scale markings, and a channel for carrying and conveying relays with product status codes that cannot be read normally.

[0141] The terminal marking mechanism 7 - 5 is a laser marking device, a pad printing device, a label sticking device or a spraying device.

[0142] like Figure 1 FIG. 1 is an embodiment of a system for verifying the delay characteristics of a relay according to the present invention.

[0143] The relay delay characteristic verification system of this embodiment includes a control unit, and a pre-detection / marking unit, a pre-adjustment unit, a verification / cooling subsystem, and a terminal detection / marking unit that are sequentially arranged and communicatively connected to the control unit respectively; the verification / cooling subsystem includes two verification and cooling combination units, namely a first verification and cooling combination unit and a second verification and cooling combination unit that are sequentially arranged between the pre-adjustment unit and the terminal detection / marking unit, and a current gear marking unit is provided between the verification unit and the combination unit of the first verification and cooling combination unit.

[0144] The relay delay characteristic verification system of this embodiment can be used to continuously complete the verification of the tripping points of two current gears of the relay.

[0145] It should be noted that for the relay delay characteristic verification system of the present invention, each unit includes an independent unit PLC control system, and a control program is pre-stored in the unit PLC control system to control the actions of the components of each unit; the control unit is to count the operation data of each unit of the system of the present invention and transmit to each unit as needed to achieve the connection operation of each unit.

[0146] As Figure 3 and 9a shown in -9c, it is an embodiment of the relay.

[0147] The relay of this embodiment includes a bimetal strip, an adjusting screw 100s, a first adjusting cam 100cam, a main contact system and an auxiliary contact system. The auxiliary contact system includes an auxiliary normally closed contact system 100c and an auxiliary normally open contact system 100o, and it includes three current gears of 1.6, 2.0, and 2.5A. As Figure 9a shown, the current gear scales are not marked on the first adjusting cam 100cam; in actual operation, only the tripping points of the 2.5 and 1.6A current gears of the relay can be verified, that is, the tripping points of the maximum and minimum current gears of the relay are verified.

[0148] When the relay of this embodiment is verified by the relay delay characteristic verification system of the above embodiment, the tripping point verification of the 2.5A current gear is completed in the first verification and cooling combination unit. If the test result is qualified, the 2.5A current gear scale is marked on the first adjusting cam 100cam (as Figure 9b shown), then the tripping point verification of the 1.6A current gear is completed in the second verification and cooling unit, and finally the terminal detection / marking unit calculates the scale position of the 2.0A current gear based on the above two verification results, and then marks the scales of the 1.6A and 2.0A current gears on the first adjusting cam 100cam respectively (as Figure 9c shown).

[0149] Specifically, after verification, the included angle between the tripping points of the maximum current range (2.5 A current range) and the minimum current range (1.6 A current range) of the relay is 180°. Then, the minimum current range (1.6 A current range) is at the 0° position, the 2.0 A current range is at the 80° position, and the 2.5 A current range is at the 180° position.

[0150] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for verifying the delay characteristics of a dual-metal switch, characterized in that: It includes the following operations: Tripping stroke pre-adjustment operation: by adjusting the relative position of the bimetallic strip of the bimetallic switch and the transmission structure, the tripping stroke of the bimetallic switch is adjusted; A trip point calibration operation is performed, after completing the trip stroke pre-adjustment operation, to calibrate the trip point of the bimetallic switch at current gear a, where current gear a represents any current gear of the bimetallic switch: a first calibration current is input into the main contact system of the bimetallic switch and maintained for a first set time, the first calibration current being 2-6 times the rated current of the relay at current gear a, and the first set time being 10-120 seconds; then a second calibration current is input into the main contact system of the bimetallic switch and maintained for a second set time, the second calibration current being 1.05-1.2 times the rated current of the relay at current gear a, and the second set time being 1-60 seconds; At the end of the second set time, the adjusting cam for adjusting the current gear of the bimetallic switch begins to be rotated until the main contact system of the bimetallic switch is disconnected or the auxiliary normally closed contact group is disconnected, and during the process of rotating the adjusting cam, the second calibration current is continuously input to the main contact system of the bimetallic switch; When the double-metal switch includes multiple current gears, it is sufficient to repeat the trip point calibration operation; After the double-metal switch completes the first trip point calibration operation, if the calibration result is unqualified, the trip stroke pre-adjustment operation is repeated, and then the trip point calibration operation is performed again.

2. The delay characteristic verification method of a dual-metal switch according to claim 1, characterized in that: The cam adjustment motor drives the adjustment cam to rotate. When the cam adjustment motor drives the adjustment cam to rotate to disconnect the auxiliary normally closed contact system of the double metal switch, the angle at which the cam adjustment motor is located is the verification result. If the verification result is within the qualified angle range, the verification result is qualified. If the verification result is not within the qualified angle range, the verification result is unqualified.

3. A method for verifying the delay characteristics of a relay, characterized in that: It includes the following steps: Step 1: Pre-adjust the tripping stroke of the relay by turning the adjusting screw of the relay for 100 seconds; Step 2 includes the following sub-steps: Step 21, J of the relay a Check the current gear trip point, J a Current gear represents any current gear of the relay: input the third calibration current to the main contact system of the relay and keep the third set time. The third calibration current is J a The third setting time is 1-60s, and then the fourth calibration current is input to the main contact system of the relay and maintained for the fourth setting time. The fourth calibration current is J a The fourth setting time is 1.05-1.2 times of the rated current of the current gear, and the fourth setting time is 1-60s; the regulating cam of the relay is the first regulating cam (100cam), and at the end of the fourth setting time, the first regulating cam (100cam) is rotated until the auxiliary normally closed contact system (100c) of the relay is disconnected, and during the process of rotating the first regulating cam (100cam), the fourth calibration current is kept input into the main contact system of the relay; Step 22, the relay completes the first J a After the current gear trip point is checked, if the check result fails, turn the adjustment screw of the relay (100s) to pre-adjust the trip stroke of the relay for a second time, and then proceed to step 2; if the check result passes, proceed to step 3; Step 3 includes the following sub-steps: Step 31: Cooling the relay.

4. The delay characteristic verification method of a relay according to claim 3, wherein: The step 1 includes the following sub-steps: Step 11, retrieve the corresponding debugging stroke parameter X according to the product status information of the relay; Step 12, identifying the state of the auxiliary contact system of the relay, the state of the auxiliary contact system including the auxiliary normally closed contact connection state and the auxiliary normally open contact connection state; Step 13: pre-adjust the tripping stroke of the relay according to the state of the auxiliary contact system and the debugging stroke parameter X.

5. The delay characteristic verification method of a relay according to claim 4, characterized in that: The step 13 includes the following sub-steps: Step 131: If the auxiliary contact system of the relay is in the auxiliary normally closed contact connected state, the adjusting screw is rotated in a first direction until the auxiliary normally closed contact system (100c) is disconnected, and then the adjusting screw is rotated in a first direction or a second direction n0 turns according to a debugging stroke parameter X, where n0=X / P, and P is the pitch of the adjusting screw; the first direction and the second direction are opposite to each other; Step 132: If the auxiliary contact system of the relay is in the auxiliary normally open contact connected state, the adjusting screw is rotated in the second direction until the auxiliary normally closed contact system (100c) is connected to switch the state of the auxiliary contact system to the auxiliary normally closed contact connected state, and then step 131 is performed.

6. The delay characteristic verification method of a relay according to claim 3, characterized in that: The cam adjustment motor drives the first adjustment cam (100cam) to rotate. When the cam adjustment motor drives the first adjustment cam (100cam) to rotate so that the auxiliary normally closed contact system (100c) of the relay is disconnected, the angle at which the cam adjustment motor is located is a first angle. The first angle is the verification result. If the first angle is not within the qualified angle range, the verification result is unqualified.

7. The delay characteristic verification method of a relay according to claim 6, characterized in that: The tripping stroke of the relay is pre-adjusted twice according to the following formula: in, Q is the number of turns of the adjusting screw (100s) required to be turned when the tripping stroke of the relay is pre-adjusted for the second time; if Q is a positive value, the adjusting screw (100s) is turned in a first direction, and if Q is a negative value, the adjusting screw (100s) is turned in a second direction; A is the first angle; W is the tripping point angle value; T is the adjustment cam lift; P is the pitch of the adjusting screw (100s).

8. The delay characteristic verification method of a relay according to claim 6, characterized in that: When the proportion of relays with unqualified verification results among the relays that have completed the first trip point verification exceeds a set limit, the corresponding debugging stroke parameter X of the unqualified relays is adjusted according to the verification results of the unqualified relays.

9. The delay characteristic verification method of a relay according to claim 3, characterized in that: Before performing step 1, the auxiliary contact performance of the auxiliary contact system of the relay is detected.

10. The method for testing the delay characteristics of a relay according to claim 3, wherein: Repeat steps 21 and 31 to complete the calibration of multiple current level trip points of the relay.

11. The delay characteristic verification method of a relay according to claim 3, characterized in that: Said step 3 also includes the following sub-steps: Step 32, after said relay completes the first trip point calibration and the calibration result is qualified, a corresponding current gear scale is marked on the first adjustment cam (100cam).

12. The delay characteristic verification method of a relay according to claim 11, characterized in that: The method further includes step 4 of detecting the auxiliary contact performance of the auxiliary contact system of the relay, and marking the remaining current gear scales for the first adjustment cam (100cam) according to the verification result of the trip point verification.

13. A delay characteristic verification system for a relay, characterized in that: It applies the delay characteristic verification method of the relay described in any one of claims 3 to 12.

14. The delay characteristic verification system of a relay according to claim 13, characterized in that: The delay characteristic verification system of the relay includes a pre-detection / marking unit, a pre-adjustment unit, a verification / cooling subsystem, a current gear marking unit and a terminal detection / marking unit; the verification / cooling subsystem includes at least one verification and cooling combination unit, each of the verification and cooling combination units includes a verification unit and a cooling unit, one or more verification and cooling combination units are provided between the pre-adjustment unit and the terminal detection / marking unit, and the current gear marking unit is provided between the verification unit and the cooling unit of the first verification and cooling combination unit or between the first verification and cooling combination unit and the second verification and cooling combination unit; The pre-detection / marking unit detects the auxiliary contact performance of the auxiliary contact system of the relay before pre-adjusting the tripping stroke of the relay and marks a unique product status code for the relay; the pre-adjustment unit pre-adjusts the tripping stroke of the relay once or twice; the verification unit verifies the tripping points of each current gear of the relay; and the cooling unit cools the relay after the tripping point verification is completed once. The current gear marking unit marks the corresponding current gear on the first adjustment cam (100cam) of the relay after the relay completes the first trip point calibration and the calibration result is qualified; the terminal detection / marking unit marks the remaining current gear scales on the first adjustment cam (100cam) according to the calibration result after the relay completes the trip point calibration.

15. The delay characteristic verification system of a relay according to claim 14, characterized in that: The invention also includes a control unit that is communicatively connected to the pre-detection / marking unit, the pre-adjustment unit, the calibration / cooling subsystem, the current gear marking unit, and the terminal detection / marking unit; the control unit stores the product status information of the relay and the debugging stroke parameter X; the pre-adjustment unit reads the product status code of the relay to obtain the corresponding debugging stroke parameter from the control unit; the calibration / cooling subsystem reads the product status code of the relay to obtain the product status information from the control unit, performs trip point calibration on the relay based on the product status information of the relay, and uploads the calibration result to the control unit; the terminal detection / marking unit reads the product status code of the relay to obtain the calibration result from the control unit, and marks the remaining current gear scales on the first adjustment cam (100cam) based on the calibration result.

16. The delay characteristic verification system of a relay according to claim 15, characterized in that: The pre-detection / marking unit comprises a first feeding channel (1-0), a first feeding mechanism (1-1), a first divider (1-2), an auxiliary contact performance detection mechanism (1-3) for verifying the auxiliary contact performance of the auxiliary contact system of the relay, a first marking mechanism (1-4) for marking a product status code for the relay, a first unloading mechanism (1-6) and a first discharging channel; the first feeding mechanism (1-1), the auxiliary contact performance detection mechanism (1-3), the first marking mechanism (1-4) and the first unloading mechanism (1-6) are sequentially arranged on the outer periphery of the first divider (1-2); the first divider (1-2) comprises a first divider turntable and a plurality of first workstations arranged on the first divider turntable for accommodating and fixing the relay; and the first discharging channel is connected to the verification / cooling subsystem.

17. The delay characteristic verification system of a relay according to claim 16, characterized in that: The pre-detection and marking unit further comprises a verification code reading device (1-5) for verifying whether the product status code can be read normally.

18. The delay characteristic verification system of a relay according to claim 16, characterized in that: The first discharge channel includes a first qualified product discharge channel and a first defective product discharge channel, and the first qualified product discharge channel is connected to the calibration / cooling subsystem.

19. The relay delay characteristic verification system according to claim 15, characterized in that: The pre-adjustment unit comprises a second code reading device for reading a product status code of a relay to obtain a corresponding debugging stroke parameter X from a control unit, an auxiliary electrode group for cooperating with an auxiliary contact system of the relay, a pre-adjustment mechanism for driving and cooperating with an adjusting screw (100s) of the relay, a second feeding channel connected to a first discharging channel of a pre-detection / marking unit, a second discharging channel for connecting to a calibration / cooling subsystem, a second loading mechanism for placing a relay in place for primary or secondary pre-adjustment, and a second unloading mechanism for unloading the relay that has completed primary or secondary pre-adjustment to the second discharging channel.

20. The delay characteristic verification system of a relay according to claim 15, characterized in that: The verification unit comprises a verification unit feeding channel (3-0), a verification unit discharging channel, a verification unit code reading device (3-1), a power shifting device (3-4), a verification unit loading / unloading mechanism (3-2), and a verification mechanism (3-3); the verification unit code reading device (3-1) reads the product status code of the relay to obtain the product status information of the relay from the control unit; the power shifting device (3-4) switches the power supply according to the product status information of the relay and inputs a preset current to the relay through the verification mechanism (3-3) and maintains the current for a preset time; the verification mechanism (3-3) completes the verification of each current gear tripping point by rotating a first adjustment cam (100cam) of the relay; and the verification unit loading / unloading mechanism (3-2) is used to load the relay to be verified from the verification unit feeding channel (3-0) to the verification mechanism (3-3) and to unload the verified relay from the verification mechanism (3-3) to the verification unit discharging channel.

21. The delay characteristic verification system of a relay according to claim 20, characterized in that: The verification unit discharge channel comprises a verification unit qualified product discharge channel (3-50) and a verification unit defective product discharge channel (3-51).

22. The delay characteristic verification system of a relay according to claim 20, characterized in that: The verification mechanism comprises a verification mechanism base (3-30) and a first pressing mechanism, a second pressing mechanism (3-33), a third pressing mechanism (3-38) and a cam adjustment mechanism (3-37) respectively arranged on the verification mechanism base (3-30); the first pressing mechanism and the second pressing mechanism (3-33) are arranged opposite to each other, and a verification station for placing a relay to be verified is provided between the first pressing mechanism and the second pressing mechanism (3-33); the first pressing mechanism and the second pressing mechanism (3-33) press the relay from opposite sides of the relay, and the third pressing mechanism (3-38) presses the relay to be verified from the side opposite to the verification mechanism base (3-30); the second pressing mechanism (3-33) comprises a verification mechanism main electrode group (3-332) and a verification mechanism auxiliary electrode group (3-333), respectively. The cam adjustment mechanism (3-37) is electrically connected to the main contact system and the auxiliary contact system of the relay to be checked. The cam adjustment mechanism (3-37) is driven and matched with the first adjustment cam (100cam) of the relay and is used to screw the first adjustment cam (100cam). The cam adjustment mechanism (3-37) includes a cam adjustment drive structure (3-372), a cam adjustment motor (3-371) and a cam screwdriver (3-370). One end of the cam screwdriver (3-370) is connected to the output shaft of the cam adjustment motor (3-371), and the other end is driven and matched with the first adjustment cam (100cam). The cam adjustment motor (3-371) is arranged on the cam adjustment drive structure (3-372). The cam adjustment drive structure (3-372) drives the cam screwdriver (3-370) to move toward or away from the first adjustment cam (100cam).

23. The delay characteristic verification method of a relay according to claim 15, wherein: The terminal detection and marking unit detects the auxiliary contact performance of the auxiliary contact system of the relay again after the relay completes the tripping point calibration. The terminal detection and marking unit includes a terminal feeding channel (7-0), a terminal feeding mechanism (7-1), a terminal divider (7-2), a terminal auxiliary contact performance detection mechanism (7-7), a terminal unloading mechanism (7-3), a terminal code reading device (7-4), a terminal marking mechanism (7-5) and a terminal unloading channel. The terminal feeding channel (7-0), the terminal auxiliary contact performance detection mechanism (7-7), the terminal code reading device (7-4) and the terminal marking mechanism (7-5) are sequentially arranged on the circumferential outer side of the terminal divider (7-2). The terminal feeding channel (7-0) is connected to the calibration / cooling subsystem. The terminal divider (7 -2) includes a terminal divider turntable and a plurality of terminal workstations arranged on the terminal divider turntable, the terminal divider turntable rotates to drive the plurality of terminal workstations to rotate cyclically; the terminal loading mechanism (7-1) loads the relay from the terminal loading channel (7-0) into the terminal workstation, the terminal auxiliary contact performance detection mechanism (7-7) detects the auxiliary contact performance of the auxiliary contact system of the relay, the terminal code reading device (7-4) reads the product status code of the relay to obtain the verification result and product status information from the control unit, the terminal marking mechanism (7-5) marks the remaining current gear scales for the first adjustment cam (100cam) of the relay, and the terminal unloading mechanism (7-3) is used to unload the relay from the terminal workstation to the terminal unloading channel.

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