Regulation method for tripping stroke of relay

Abstract

The invention belongs to the technical field of low-voltage electric appliances, and particularly discloses a method for adjusting the tripping stroke of a relay. According to the method for adjusting the tripping stroke of the relay, the product information of the relay is obtained, the tripping stroke adjusting parameters are determined according to the product information of the relay, the tripping stroke of the relay is pre-adjusted according to the tripping stroke adjusting parameters, and then tripping point verification is conducted on the relay. The method comprises the steps of obtaining a tripping point verification parameter of a relay, determining a tripping stroke compensation parameter according to the tripping point verification parameter, carrying out compensation adjustment on the tripping stroke of the relay according to the tripping stroke compensation parameter, and correcting the adjustment of the tripping stroke of the relay. The defects existing in manual adjustment and the defects existing in adjustment according to a process preset value in the prior art are overcome, and the precision of relay tripping stroke adjustment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a method for adjusting the trip distance of a relay. BACKGROUND

[0002] A thermal overload relay is used for protecting an electric motor, and generally comprises a heat generating component, a main bimetallic bending mechanism, a displacement transmission mechanism and a tripping mechanism. When the working current flowing through the motor is overloaded, the displacement generated by the deformation of the main bimetallic bending mechanism is transmitted to the tripping mechanism through the displacement transmission mechanism, and the thermal overload relay is tripped, so as to achieve the purpose of protecting the motor. How to make the product trip accurately is crucial to the accuracy of adjusting the trip distance of the bimetallic switch product.

[0003] In the prior art, as shown in Figure 1 There are various forms of methods for adjusting the trip distance. One way of adjusting the trip distance is to adjust the distance between the adjusting screw 3 and the setting current adjusting knob 1 by using a clamp or a tool, and the distance is the trip distance of the relay. Alternatively, a fixed-thickness plug is placed between the first lever 21 and the second lever 22 to change the trip distance of the relay. This adjusting method completely relies on manual experience, and is inaccurate and inefficient in debugging. Another way of adjusting the trip distance is to adjust according to the process preset value. However, there are differences in the bending characteristics of each batch of bimetallic components 4 and cumulative errors of parts, resulting in inconsistent trip distances between batches or each product. The process preset value is only a theoretical value, and cannot adapt to each product, so the process preset value loses its guiding significance. SUMMARY

[0004] The present application aims to provide a method for adjusting the trip distance of a relay, which overcomes the defects of manual adjustment and adjustment according to the process preset value in the prior art, and improves the accuracy of adjusting the trip distance of the relay.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The method for adjusting the trip distance of a relay comprises the following steps:

[0007] determining a trip distance adjustment parameter according to the product information of the relay;

[0008] pre-adjusting the trip distance of the relay according to the trip distance adjustment parameter;

[0009] passing a verification current to the relay and performing a trip point verification to obtain a trip point verification parameter of the relay;

[0010] determining a trip distance compensation parameter according to the trip point verification parameter;

[0011] Compensate and adjust the tripping stroke of the relay according to the tripping stroke compensation parameter.

[0012] As an optional technical solution of the above-mentioned adjustment method of the tripping stroke of the relay, the relay is passed through a verification current and a tripping point verification is performed to obtain a tripping point verification parameter of the relay, which comprises:

[0013] The relay is sequentially passed through n verification currents, and each verification current corresponds to a holding time, the current values of the n verification currents are sequentially reduced, and each verification current is greater than or equal to the rated current of the current level of the relay;

[0014] If the verification current passed through the relay is less than n, or the time of passing the n verification current through the relay is less than the holding time corresponding to the n verification current, the bimetallic component of the relay is deformed to trip the relay, and the tripping point verification parameter is obtained;

[0015] If the n verification current is passed through the relay and the corresponding holding time is maintained, the setting current adjustment knob of the relay is twisted, the relay is tripped, the n verification current is maintained during the process of twisting the setting current adjustment knob, and the tripping point verification parameter is obtained when the relay is tripped;

[0016] Wherein, n is an integer greater than 1.

[0017] As an optional technical solution of the above-mentioned adjustment method of the tripping stroke of the relay, when the setting current adjustment knob is twisted to trip the relay, the angle value corresponding to the position of the setting current adjustment knob is the tripping point verification parameter;

[0018] If the tripping point verification parameter is less than the lower limit value of tripping, the relay is unqualified;

[0019] If the tripping point verification parameter is greater than or equal to the lower limit value of tripping and less than or equal to the upper limit value of tripping, the relay is qualified;

[0020] Wherein, the upper limit value of tripping is greater than the lower limit value of tripping.

[0021] As an optional technical solution of the above-mentioned adjustment method of the tripping stroke of the relay, when the tripping point verification parameter is less than the lower limit value of tripping, the tripping stroke compensation parameter is determined according to the tripping point verification parameter, which comprises:

[0022] Tripping stroke compensation parameter=(Tripping point verification parameter-μ)×β (Formula 1);

[0023] Wherein, μ is a preset angle value of the position of the setting current adjustment knob, and β is a constant.

[0024] As an optional technical solution of the above-mentioned relay tripping stroke adjustment method, when the bimetallic component of the relay is deformed to trip the relay, the relay is unqualified, and the tripping stroke compensation parameter is determined according to the tripping point check parameter, including:

[0025] If the relay is tripped when the first segment of the check current is passed to the relay, and the actual time of passing the first segment of the check current is less than the holding time corresponding to the first segment of the check current, the relay is returned to repair;

[0026] If the relay is tripped when the mth segment of the check current is passed to the relay, and the actual time t m1 of passing the mth segment of the check current is less than the holding time t m2 corresponding to the mth segment of the check current, the tripping point check parameter is obtained according to t m1 and t m2 .

[0027] Wherein, m is greater than 1 and less than or equal to n.

[0028] As an optional technical solution of the above-mentioned relay tripping stroke adjustment method, the tripping point check parameter is obtained according to t m1 and t m2 , and the tripping stroke compensation parameter is determined according to the tripping point check parameter, including:

[0029] The tripping stroke compensation parameter = (t m2 -t m1 )×θ m (Formula 2);

[0030] Wherein, θ m is a compensation coefficient.

[0031] As an optional technical solution of the above-mentioned relay tripping stroke adjustment method, the tripping point check parameter is obtained according to t m1 and t m2 , and the tripping stroke compensation parameter is determined according to the tripping point check parameter, including:

[0032] The tripping point check parameter of the relay is defined as a, x relays checked by the tripping point are extracted, and the tripping point check parameter corresponding to each relay is defined as a1, a2, …, a x , and the tripping point check parameter = [(a1+a2+…+a x ) / x-μ]×β (Formula 3);

[0033] Wherein, x is the sample size; μ is the preset angle value of the position of the setting current adjustment knob; β is a constant.

[0034] As an optional technical solution of the relay tripping stroke adjustment method, if the tripping point check parameter a is less than the tripping lower limit value, then a = tripping lower limit value - b in formula 3 is brought in;

[0035] If the tripping point check parameter a is greater than the tripping upper limit value, then a = tripping upper limit value + c in formula 3 is brought in;

[0036] Wherein, b and c are constants.

[0037] As an optional technical solution of the relay tripping stroke adjustment method, the compensation adjustment of the tripping stroke of the relay according to the tripping stroke compensation parameter comprises:

[0038] If the tripping stroke compensation parameter is a positive value, the adjusting screw of the relay is counterclockwise rotated to change the distance between the adjusting screw and the setting current adjusting knob;

[0039] If the tripping stroke compensation parameter is a negative value, the adjusting screw of the relay is clockwise rotated to change the distance between the adjusting screw and the setting current adjusting knob.

[0040] As an optional technical solution of the relay tripping stroke adjustment method, the tripping stroke adjustment parameter is the tripping stroke adjustment parameter of the relay of the same type and after the tripping stroke compensation adjustment in the last batch.

[0041] The beneficial effects of the present application are:

[0042] The relay tripping stroke adjustment method provided by the present application acquires product information of the relay, determines a tripping stroke adjustment parameter according to the product information of the relay, pre-adjusts the tripping stroke of the relay according to the tripping stroke adjustment parameter, then checks the tripping point of the relay, acquires a tripping point check parameter of the relay, determines a tripping stroke compensation parameter according to the tripping point check parameter, and compensates and adjusts the tripping stroke of the relay according to the tripping stroke compensation parameter. The adjustment of the tripping stroke of the relay is corrected, the defects existing in the manual adjustment in the prior art and the defects existing in the adjustment according to the preset value in the process are overcome, and the precision of the relay tripping stroke adjustment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a structural schematic diagram of the relay provided by the embodiment of the present application;

[0044] Figure 2 is a flowchart of the relay tripping stroke adjustment method provided by the embodiment of the present application.

[0045] In the figure:

[0046] 1, setting current adjusting knob; 2, intermediate transmission mechanism; 3, adjusting screw; 4, bimetallic component; 5, heating component;

[0047] 21, first lever; 22, second lever. DETAILED DESCRIPTION

[0048] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the application and are not limiting to the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the purpose of description, not all the structures.

[0049] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature includes the vertical and oblique above of the first feature to the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes the vertical and oblique below of the first feature to the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the purpose of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation to the application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0052] As shown in Figure 1 and Figure 2 The present application provides a method for adjusting the trip of a relay, which can be applied to the adjustment of the trip of a thermal overload relay. Specifically, the adjustment method comprises:

[0053] determine a trip range compensation parameter according to the trip point check parameter;

[0054] pre-adjust the trip range of the relay according to the trip range compensation parameter;

[0055] pass a check current to the relay and perform a trip point check to obtain a trip point check parameter of the relay;

[0056] determine a trip range compensation parameter according to the trip point check parameter;

[0057] compensate and adjust the trip range of the relay according to the trip range compensation parameter.

[0058] The adjustment method corrects the trip range of the relay, overcomes the defects in manual adjustment and the defects in adjustment according to preset values in the prior art, and improves the accuracy of the trip range adjustment of the relay.

[0059] In some embodiments, determining a trip range adjustment parameter according to product information of the relay comprises:

[0060] Step one, determine the model information and the like of the relay to be adjusted.

[0061] Specifically, the model information and the like of the relay are obtained by scanning a one-dimensional code or a two-dimensional code on the relay through a code reader.

[0062] Step two, call the trip range adjustment parameter corresponding to the relay of the model.

[0063] Specifically, the trip range adjustment parameter is the trip range adjustment parameter of the relay of the same model in the last batch and after the trip compensation adjustment, and the trip range of the relay to be adjusted is pre-adjusted using the trip range adjustment parameter. Since the bending characteristics of each batch of bimetallic components 4 are different and there are cumulative errors in the parts, the trip ranges are inconsistent between batches or between each product, so after the trip ranges of part of the relays are pre-adjusted, compensation adjustment is still needed to improve the accuracy of the trip range adjustment of the batch of relays.

[0064] Pre-adjusting the trip range of the relay according to the trip range adjustment parameter comprises:

[0065] The position of the adjusting screw 3 of the relay is obtained through a visual detection system, and the adjusting screw 3 is rotated clockwise or counterclockwise combined with the trip range adjustment parameter to trip the relay.

[0066] In some embodiments, passing a check current to the relay and performing a trip point check to obtain a trip point check parameter of the relay comprises:

[0067] The relay is sequentially connected with n segments of verification currents, each segment of verification current corresponds to a holding time, the current values of the n segments of verification currents are sequentially reduced, and each segment of verification current is greater than or equal to the rated current of the current level of the relay; wherein n is an integer greater than 1.

[0068] If the verification current connected to the relay is less than n segments, or the time for connecting the relay with the nth segment of verification current is less than the holding time corresponding to the nth segment of verification current, the bimetallic component 4 of the relay is deformed to trip the relay, and the tripping point verification parameter is obtained. The relay tripped early in this case is determined to be unqualified.

[0069] If the nth segment of verification current is connected to the relay and maintained for the corresponding holding time, the setting current adjusting knob 1 of the relay is screwed, and the relay is tripped, in the process of screwing the setting current adjusting knob 1, the nth segment of verification current is maintained to be connected to the relay, and the tripping point verification parameter is obtained when the relay is tripped. If the angle of rotation of the setting current adjusting knob 1 is within the required range, the relay is qualified, and if the angle of rotation of the setting current adjusting knob 1 is not within the required range, the relay is unqualified. The setting current adjusting knob 1 is a cam structure.

[0070] The tripping point verification method provided in the embodiment adopts multiple segments of verification currents with different sizes, and the current values of the multiple segments of verification currents are sequentially reduced. The large current has a rapid impact on the bimetallic component 4, and the sequentially reduced current values gradually form a stable state of the bimetallic component 4, thereby improving the tripping point verification efficiency and ensuring the accuracy of the tripping point verification.

[0071] It should be noted that the current value of each segment of verification current and the holding time are related to the structure, power of the heating component 5 of the relay, the specific bending of the bimetallic component 4, and the overall structure of the relay. The size of the current value and the holding time are obtained through analysis and statistics of experimental data.

[0072] Optionally, the setting current adjusting knob 1 is driven to rotate by adjusting the motor, which ensures the timeliness and consistency of the adjustment process and improves the accuracy of the tripping point verification.

[0073] For example, three test currents are sequentially applied to the relay. The first test current is 2 to 6 times the rated current of the relay's first current setting, and the first holding time is 10 to 120 seconds. The second test current is 1.05 to 1.2 times the rated current of the relay's first current setting, and the second holding time is 1 to 60 seconds. The third test current is 1.0 to 1.1 times the rated current of the relay's first current setting, and the third holding time is 5 to 10 seconds. The first test current causes a rapid impact on the bimetallic component 4, while the second and third test currents bring the bimetallic component 4 to a stable state, thereby improving the efficiency of the tripping point test while ensuring the accuracy of the tripping point test.

[0074] Relays typically have multiple current settings, each with a different rated current. Trip point verification can be performed by repeatedly checking the trip point of the relay, either on all current settings or on only a subset. Generally, once the trip travel of the highest rated current setting (also known as the relay's maximum setting) is adjusted to meet requirements, the trip travel of the relay at other current settings will also meet requirements.

[0075] In one embodiment, the relays are adjusted in batches. After the tripping point of the relays in batches is checked, the tripping stroke compensation parameters are determined according to the tripping point check parameters. Then, the tripping stroke of the relays is adjusted to compensate according to the tripping stroke compensation parameters.

[0076] Define the tripping point verification parameter of the relay as 'a', select x relays that have passed the tripping point verification, and define the tripping point verification parameter for each relay as a1, a2, ..., a x Tripping point verification parameters = [(a1+a2+……+a x ) / x-μ]×β (Equation 3), where x is the sample size; μ is the preset angle value of the position of the setting current adjustment knob 1; and β is a constant. It should be explained that the tripping point verification parameter a is the angle value corresponding to the position of the setting current adjustment knob 1 relative to the starting point. The starting point is a set point. After the relay is assembled, the setting current adjustment knob 1 will form a certain angle relative to the starting point.

[0077] μ is the preset angle value of the position of the current adjustment knob 1. This preset angle value is the theoretical design value, that is, the desired ideal value. Each type of relay has a theoretical design value set during the manufacturing process.

[0078] β is a constant, and the β values of different types of relays are different. β is related to the parameters of the setting current adjusting knob 1 and the parameters of the adjusting screw 3, and it reflects the ratio of the angle of rotation of the adjusting screw 3 to the angle of rotation of the setting current adjusting knob 1. In (a1+a2+…+a x After multiplying (a1+a2+…+a

[0079] Different types of relays correspond to a set of upper and lower limits of the tripping value, and the upper and lower limits of the tripping value are set parameters when the tripping point of the relay is checked. The upper limit of the tripping value is greater than the lower limit of the tripping value. If the tripping point check parameter is greater than or equal to the lower limit of the tripping value and less than or equal to the upper limit of the tripping value, the relay is qualified. If the tripping point check parameter is less than the lower limit of the tripping value, that is, the angle of the position of the setting current adjusting knob 1 after being rotated is less than the lower limit of the tripping value, that is, the relay is tripped after the setting current adjusting knob 1 is excessively rotated, in this case, the relay is unqualified. If the tripping point check parameter is greater than the upper limit of the tripping value, that is, the check current of the relay is less than n segments, or the time of the check current of the relay is less than the holding time corresponding to the n-th segment of the check current, the relay is tripped before the setting current adjusting knob 1 is rotated, in this case, the relay is unqualified.

[0080] For the case where the relay is qualified, the tripping point check parameter is directly brought into the above-mentioned formula 3. For the relay whose tripping point check parameter a is less than the lower limit of the tripping value, a = lower limit of the tripping value-b is brought into formula 3, where b is a constant. For all relays whose tripping point check parameter a is less than the lower limit of the tripping value, the tripping point check parameter a is calculated according to the lower limit of the tripping value-b, and the b values of different types of relays are different. For the relay whose tripping point check parameter a is greater than the upper limit of the tripping value, a = upper limit of the tripping value+c is brought into formula 3, where c is a constant. For all relays whose tripping point check parameter a is greater than the upper limit of the tripping value, the tripping point check parameter a is calculated according to the upper limit of the tripping value+c, and the c values of different types of relays are different. b and c are revision parameters, and b and c are related to the structure, power of the heating component 5, the specific bending of the bimetallic component 4, and the overall structure of the relay, and the specific values are obtained through the analysis and statistics of experimental data.

[0081] In this embodiment, the compensation adjustment of the tripping stroke of the relay according to the tripping stroke compensation parameter includes:

[0082] If the tripping stroke compensation parameter is a positive value, the adjusting screw 3 of the relay is counterclockwise rotated to change the distance between the adjusting screw 3 and the setting current adjusting knob 1.

[0083] If the trip stroke compensation parameter is negative, rotate the adjusting screw 3 clockwise to change the distance between the adjusting screw 3 and the setting current adjusting knob 1.

[0084] For example, for a certain type of relay, μ = 220°, β = 14.4, the upper limit of the trip is 280°, the lower limit of the trip is 160°, b = 8, c = 10, 50 relays are randomly selected for trip point verification, and the 50 relays include qualified relays and unqualified relays.

[0085] For relays with trip point verification parameter a less than 160°, a = 160-8 = 152° is brought into formula 3.

[0086] For relays with trip point verification parameter a greater than 280°, a = 280+10 = 290° is brought into formula 3.

[0087] For relays with trip point verification parameter a greater than or equal to 160° and less than or equal to 280°, the trip point verification parameter a is directly brought into formula 3.

[0088] The trip point verification parameter = [(a1+a2+…+a 50 ) / 50-220]×14.4.

[0089] The present embodiment uses fast calibration data to realize automatic adjustment of the trip stroke through real-time feedback, ensuring high qualification rate and high quality of batch production.

[0090] In another embodiment, relays that fail trip point verification are repaired and adjusted for trip, and this method is for adjusting a single unqualified relay. There are two unqualified situations when relays are subjected to trip point verification. The first is that the relay trips only after the setting current adjusting knob 1 is rotated, and the angle of rotation exceeds the qualified range. The second is that the relay has not reached the stage of rotating the setting current adjusting knob 1, and the deformation of the bimetallic component 4 causes the relay to trip.

[0091] In the first scenario, when performing tripping point verification, the relay trips by turning the setting current adjustment knob 1. The position of the setting current adjustment knob 1 corresponds to the angle, which is the tripping point verification parameter. If the tripping point verification parameter is less than the lower tripping limit, the relay is unqualified. If the tripping point verification parameter is greater than or equal to the lower tripping limit and less than or equal to the upper tripping limit, the relay is qualified. For relays with tripping point verification parameters less than the lower tripping limit, the tripping stroke is adjusted. The tripping stroke compensation parameter is determined based on the tripping point verification parameter, specifically: Tripping stroke compensation parameter = (tripping point verification parameter - μ) × β (Equation 1). The tripping stroke compensation parameter calculated using this formula is used to adjust the tripping stroke of the relay. μ and β have the same meaning as in Equation 3 above. μ is the preset angle value of the position of the setting current adjustment knob 1, and β is a constant. The specific meanings of μ and β are described above and will not be repeated here.

[0092] For example, μ = 220°, β = 14.4, trip stroke compensation parameter = (trip point verification parameter - 220) × 14.4, and the trip point verification parameter in this formula is the actual angle corresponding to the position of the setting current adjustment knob 1 after trip point verification adjustment.

[0093] In the second scenario, if the bimetallic component 4 of the relay deforms and causes the relay to trip before the current setting knob 1 is turned, the relay is considered defective. The tripping travel compensation parameters, determined based on the tripping point calibration parameters, include:

[0094] If the relay trips when the first test current is applied to the relay, and the actual time of applying the first test current is less than the holding time corresponding to the first test current, the relay will be returned for repair.

[0095] If the m-th test current is applied to the relay, and the actual time t for applying the m-th test current is... m1 The holding time t corresponding to the verification current of segment m is less than m2 When the relay trips, according to t m1 and t m2 Obtain the tripping point verification parameters; where m is greater than 1 and less than or equal to n.

[0096] In this case, the duration of current flow is related to the deformation of the bimetallic component 4. The deformation of the bimetallic component 4 causes the relay to trip through the intermediate transmission mechanism 2. Therefore, the tripping point verification parameters are obtained through the time parameters.

[0097] Optionally, according to t m1 and t m2 The specific steps for obtaining the tripping point verification parameters are as follows:

[0098] Tripping travel compensation parameter = (tm2 -t m1 ) x θ m (Formula 2); wherein, θ m is a compensation coefficient.

[0099] The length of the current passing time is related to the deformation of the bimetallic component 4, and the deformation of the bimetallic component 4 changes the position of the adjusting screw 3 when the relay is tripped, and further changes the distance between the adjusting screw 3 and the setting current adjusting knob 1, θ m is the ratio of the angle of rotation of the adjusting screw 3 to the time, i.e. a coefficient indicating the angle of rotation of the adjusting screw 3 in unit time, to ensure that the distance between the adjusting screw 3 and the setting current adjusting knob 1 is constant. θ m The specific value is obtained by analyzing and counting experimental data, and the value of θ m is different for different segments of the verification current. After (t m2 -t m1 ) is multiplied by θ m , the difference between the holding time corresponding to the current passing through this segment and the actual time is converted into the angle of rotation of the adjusting screw 3, and then the adjusting screw 3 is rotated according to the parameters obtained from the above formula, to change the distance between the adjusting screw 3 and the setting current adjusting knob 1, and further to adjust the tripping distance.

[0100] Exemplarily, for a certain type of relay, three segments of verification current are passed in turn. During the process of passing the first segment of verification current, if the relay is tripped, the relay is disassembled for repair. After the first segment of verification current is passed, during the process of passing the second segment of verification current, if the relay is tripped, the tripping distance compensation parameter = (t 22 -t 21 ) x θ2, wherein θ2 is 55. After the first segment of verification current and the second segment of verification current are passed, during the process of passing the third segment of verification current, if the relay is tripped, the tripping distance compensation parameter = (t 32 -t 31 ) x θ3, wherein θ3 is 10.

[0101] In the embodiment, compensating and adjusting the tripping distance of the relay according to the tripping distance compensation parameter includes:

[0102] If the tripping distance compensation parameter is positive, the adjusting screw 3 of the relay is rotated counterclockwise to change the distance between the adjusting screw 3 and the setting current adjusting knob 1;

[0103] If the tripping distance compensation parameter is negative, the adjusting screw 3 is rotated clockwise to change the distance between the adjusting screw 3 and the setting current adjusting knob 1.

[0104] The embodiment can carry out accurate and reliable repair for each unqualified relay, adjust the tripping stroke, and improve the qualified rate of the repaired product.

[0105] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A method for adjusting the tripping stroke of a relay, characterized in that, The adjustment method includes: Determine the tripping stroke adjustment parameters based on the relay's product information; The tripping stroke of the relay is pre-adjusted according to the tripping stroke adjustment parameters; Apply a verification current to the relay and perform a tripping point verification to obtain the tripping point verification parameters of the relay; Determine the tripping stroke compensation parameters based on the tripping point verification parameters; The tripping stroke of the relay is adjusted and compensated according to the tripping stroke compensation parameters.

2. The method for adjusting the tripping stroke of a relay according to claim 1, characterized in that, Applying a verification current to the relay and performing a tripping point verification to obtain the relay's tripping point verification parameters include: The relay is sequentially supplied with n segments of verification current, each segment of verification current having a corresponding holding time. The current values ​​of the n segments of verification current decrease sequentially, and each segment of verification current is greater than or equal to the rated current of the current range of the relay. If the verification current applied to the relay is less than n segments, or the time for applying the nth segment of verification current to the relay is less than the holding time corresponding to the nth segment of verification current, the bimetallic component of the relay deforms, causing the relay to trip, and the tripping point verification parameters are obtained. If, after applying the nth segment of verification current to the relay and maintaining the corresponding holding time, the relay's setting current adjustment knob is turned to trip the relay, while turning the setting current adjustment knob, the nth segment of verification current is maintained on the relay, and the tripping point verification parameters are obtained when the relay trips. Where n is an integer greater than 1.

3. The method for adjusting the tripping stroke of a relay according to claim 2, characterized in that, When the relay is tripped by turning the setting current adjustment knob, the angle value corresponding to the position of the setting current adjustment knob is the tripping point verification parameter. If the tripping point verification parameter is less than the lower limit of the tripping value, then the relay is unqualified; If the tripping point verification parameter is greater than or equal to the lower tripping limit and less than or equal to the upper tripping limit, then the relay is qualified; Wherein, the upper limit of the tripping value is greater than the lower limit of the tripping value.

4. The method for adjusting the tripping stroke of a relay according to claim 3, characterized in that, When the tripping point verification parameter is less than the lower limit of tripping, the tripping stroke compensation parameter is determined based on the tripping point verification parameter, including: Tripping travel compensation parameter = (tripping point verification parameter - μ) × β (Equation 1); Where μ is the preset angle value of the position of the current adjustment knob, and β is a constant.

5. The method for adjusting the tripping stroke of a relay according to claim 2, characterized in that, When the bimetallic component of the relay deforms, causing the relay to trip, the relay is deemed defective. The tripping travel compensation parameters are determined based on the tripping point verification parameters, including: If the relay trips when the first test current is applied to the relay and the actual time of applying the first test current is less than the holding time corresponding to the first test current, the relay will be returned for repair. If the m-th segment of the verification current is applied to the relay, and the actual time t for applying the m-th segment of the verification current is... m1 The holding time t corresponding to the verification current of segment m is less than m2 When the relay trips, according to t m1 and t m2 Obtain the tripping point verification parameters; Where m is greater than 1 and less than or equal to n.

6. The method for adjusting the tripping stroke of a relay according to claim 5, characterized in that, According to t m1 and t m2 The specific steps for obtaining the tripping point verification parameters are as follows: Tripping travel compensation parameter = (t m2 -t m1 )×θ m (Equation 2); Where, θ m This is the compensation coefficient.

7. The method for adjusting the tripping stroke of a relay according to claim 1 or 2, characterized in that, Determining the tripping stroke compensation parameters based on the tripping point verification parameters includes: Define the tripping point verification parameter of the relay as 'a', extract x relays that have passed the tripping point verification, and define the tripping point verification parameter corresponding to each relay as a1, a2, ..., a1, a2, ..., a2, a3, a4, a5, a6, a7, a8, a9, a1, a1, a2, ..., a1, a2, a1, a2, ..., a1, a1, a2, a1, a1, a2, ..., a1 ... x Tripping point verification parameters = [(a1+a2+……+a x ) / x-μ]×β (Equation 3); Where x is the sample size; μ is the preset angle value of the current adjustment knob; and β is a constant.

8. The method for adjusting the tripping stroke of a relay according to claim 7, characterized in that, If the tripping point verification parameter a is less than the lower limit of tripping, then substitute a into Equation 3: a = lower limit of tripping - b; If the tripping point verification parameter 'a' is greater than the upper limit of the tripping value, then substitute it into Equation 3: a = upper limit of the tripping value + c; Where b and c are both constants.

9. The method for adjusting the tripping stroke of a relay according to claim 1, characterized in that, Adjusting the tripping stroke of the relay according to the tripping stroke compensation parameters includes: If the tripping travel compensation parameter is positive, rotate the adjusting screw of the relay counterclockwise to change the distance between the adjusting screw and the setting current adjustment knob; If the tripping stroke compensation parameter is negative, rotate the adjusting screw clockwise to change the distance between the adjusting screw and the setting current adjustment knob.

10. The method for adjusting the tripping stroke of a relay according to claim 1, characterized in that, The tripping stroke adjustment parameter is the tripping stroke adjustment parameter of the relay of the same model from the previous batch after tripping stroke compensation adjustment.

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