A quick screening and testing device for electromagnetic relay magnetic steel

Abstract

The utility model discloses a kind of electromagnetic relay magnetic steel rapid screening test device, it is related to relay testing technical field, and it includes: fluxmeter, test coil, positioning mechanism and clamping body;Wherein, positioning mechanism is set to the inside of clamping body, test coil is set to the position above positioning mechanism, and test coil is electrically connected with fluxmeter;Positioning mechanism includes fixed block, multiple jacks are set on fixed block, top block is inserted and set in each jack, and the side of jack is provided with locating bolt, and locating bolt is used to fix the position of top block in jack;Test coil includes the skeleton cavity being set on the upper portion of clamping body and the coil being covered on the skeleton cavity, and the size of skeleton cavity is matched with the size of the electromagnetic relay magnetic steel to be measured.The utility model alleviates the technical problem of large error and low efficiency in the screening test of relay magnetic steel in prior art.

Description

Technical Field

[0001] This utility model relates to the field of relay testing technology, specifically to a rapid screening and testing device for electromagnetic relay magnets. Background Technology

[0002] Magnets play a crucial role in electromagnetic relays, participating in the magnetic circuit operation and maintaining the armature; they are one of the key components. Before assembly, magnets need to be screened and tested to remove those with weak magnetic force. Weak magnetic force will prevent the relay from being adjusted to the correct electrical parameters.

[0003] Traditional magnet screening tests use the weight-lifting method, which is affected by factors such as magnet surface quality and operator technique, resulting in large testing errors and low efficiency. Even after screening, a significant proportion of relays still fail to meet testing standards due to insufficient magnet strength, indicating that the weight-lifting method is ineffective in eliminating substandard magnets. Research identified four existing instruments for testing magnet properties, but all suffer from large errors and low efficiency, making them unsuitable for relay magnet screening tests. Utility Model Content

[0004] The purpose of this invention is to provide a rapid screening and testing device for electromagnetic relay magnets in order to solve at least one of the above-mentioned technical problems.

[0005] In a first aspect, this utility model provides a rapid screening and testing device for electromagnetic relay magnets, comprising: a fluxmeter, a test coil, a positioning mechanism, and a clamping body; wherein, the positioning mechanism is disposed inside the clamping body, the test coil is disposed above the positioning mechanism, and the test coil is electrically connected to the fluxmeter; the positioning mechanism includes a fixing block, the fixing block is provided with multiple insertion holes, a top block is inserted into each insertion hole, and a positioning bolt is provided on the side of the insertion hole, the positioning bolt being used to fix the position of the top block in the insertion hole; the test coil includes a skeleton cavity disposed on the upper part of the clamping body and a coil covering the skeleton cavity, the size of the skeleton cavity matching the size of the electromagnetic relay magnet to be tested.

[0006] Optionally, the clamp body is made of a non-magnetic material, and the coil is made of enameled wire.

[0007] Optionally, the fixing block has a stepped structure and is fixed inside the clamping body by fixing bolts.

[0008] Optionally, the fixing block, the top block, and the positioning bolt are all made of non-magnetic metal materials.

[0009] Optionally, a terminal block is provided on the side of the clamping body, and the terminal block is connected to the lead wire of the test coil.

[0010] Optionally, the skeleton cavity is fixed to the fixing block by skeleton fixing bolts.

[0011] This invention provides a rapid screening and testing device for electromagnetic relay magnets. It utilizes a fluxmeter connected to a test coil. When a magnet is removed from or placed within the coil, the device outputs a magnetic flux value, reflecting the magnitude of the magnet's magnetic properties. The working principle is that the coil generates an induced electromotive force (EMF) when the magnet is removed or placed within it. The fluxmeter integrates this EMF, converts it, and outputs the magnetic flux value. This invention features a simple structure, high test accuracy, and the ability to simultaneously measure multiple magnets, thus alleviating the problems of large errors and low efficiency in existing relay magnet screening tests. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 A side sectional view of an electromagnetic relay magnet rapid screening test device provided for an embodiment of this utility model; Figure 2 A top view of an electromagnetic relay magnet rapid screening test device provided for an embodiment of this utility model; Figure 3 This is a schematic diagram of the electrical connection of an electromagnetic relay magnet rapid screening test device provided for an embodiment of this utility model.

[0014] In the diagram: 1. Magnetometer, 2. Test coil, 21. Skeleton cavity, 22. Coil, 3. Clamp body, 4. Fixing block, 5. Socket, 6. Top block, 7. Positioning bolt, 8. Magnet of the electromagnetic relay under test, 9. Fixing bolt, 10. Terminal block, 11. Skeleton fixing bolt. Detailed Implementation

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

[0016] Figure 1This is a side sectional view of an electromagnetic relay magnet rapid screening test device provided according to an embodiment of the present utility model. Figure 2 This is a top view of an electromagnetic relay magnet rapid screening test device provided according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the electrical connections of an electromagnetic relay magnet rapid screening test device according to an embodiment of this utility model. Figures 1-3 As shown, it includes: a magnetometer 1, a test coil 2, a positioning mechanism and a clamping body 3; wherein, the positioning mechanism is disposed inside the clamping body 3, the test coil 2 is disposed above the positioning mechanism, and the test coil 2 is electrically connected to the magnetometer 1.

[0017] Preferably, the fluxmeter 1 is connected to both ends of the wire of the test coil 2 through an input interface to collect and integrate the induced electromotive force generated by the test coil 2, and outputs the magnetic flux value after conversion by the internal circuit. Optionally, the fluxmeter 1 provided in this embodiment of the present invention has a minimum display accuracy of 0.01mWb and has both button-type and foot-operated reset and zeroing functions.

[0018] Specifically, the positioning mechanism includes a fixing block 4, which has multiple insertion holes 5. A top block 6 is inserted into each insertion hole 5, and a positioning bolt 7 is provided on the side of the insertion hole 5. The positioning bolt 7 is used to fix the position of the top block 6 in the insertion hole 5.

[0019] Specifically, the test coil 2 includes a skeleton cavity 21 disposed on the upper part of the clamping body 3 and a coil 22 covering the skeleton cavity 21. The size of the skeleton cavity 21 matches the size of the magnet 8 of the electromagnetic relay to be tested.

[0020] Preferred, such as Figure 1 As shown, the skeleton cavity 21 is fixed to the fixing block 4 by the skeleton fixing bolt 11.

[0021] Preferably, the clamp body 3 is made of a non-magnetic material, and the coil 22 is made of enameled wire.

[0022] Preferably, the skeleton cavity 21 of the test coil 2 is made of non-magnetic metal material; the size of the skeleton cavity 21 matches the cross-section of the electromagnetic relay magnet 8 under test with a single-sided gap of less than 0.1mm; an insulating film is provided between the enameled wire and the skeleton cavity 21; the window cross-section length of the skeleton cavity 21 is consistent with the length of the electromagnetic relay magnet 8 under test, and the width is about 1 to 2 times the cross-sectional length of the electromagnetic relay magnet 8 under test, with one side slightly wider and provided with a U-shaped groove; the wall thickness is about 0.4mm; the enameled wire diameter is φ0.07mm to φ0.1mm, which can be machine-wound; the number of turns is controlled from 3mWb to 15mWb according to the measured value; the coil 22 has leads connecting the two ends of the enameled wire to connect to the input interface of the fluxmeter 1.

[0023] Preferably, such as Figure 1 As shown, the fixing block 4 has a stepped structure and is fixed inside the clamping body 3 by fixing bolts 9. In this embodiment of the invention, by setting the fixing block 4 as a stepped structure, test coils 2 of different heights can be set above the fixing block 4 to accommodate the screening test of different types of relay magnets.

[0024] For example, such as Figure 1 As shown, the fixing block 4 has a three-tiered stepped structure, with three test coils 2 of different heights set on top, which can simultaneously test three different types of electromagnetic relay magnets.

[0025] Preferably, the fixing block 4, the top block 6, and the positioning bolt 7 are all made of non-magnetic metal materials.

[0026] In this embodiment of the invention, the positioning mechanism is used to adjust and control the depth of the magnet inserted into the cavity, and is made of non-magnetic metal material. This depth is determined according to the position of the magnet in the relay, and is generally between 3mm and 6mm. The top block 6 passes through the skeleton cavity 21 and is inserted into the socket 5. The height of the top block 6 is adjusted according to the model of the electromagnetic relay magnet 8 to be tested. After adjustment, it is locked from the side of the fixing block 4 with the positioning bolt 7.

[0027] Preferably, a terminal block 10 is provided on the side of the clamping body 3, and the terminal block 10 is connected to the lead wire of the test coil 2. The outside of the terminal block 10 is electrically connected to the magnetometer 1 through a wire.

[0028] The following examples, using several specific embodiments, illustrate the usage method of the electromagnetic relay magnet rapid screening test device provided by this utility model. Figure 1 The three test coils 2 shown are numbered from left to right as test coil 1, test coil 2, and test coil 3, and the corresponding top blocks 6 are numbered as top block 1, top block 2, and top block 3, respectively.

[0029] Implementation method 1: The test piece is a magnetic steel part used inside a military electromagnetic relay, and the relay model is 1JB10-1.

[0030] The operating procedure is as follows: Adjust the second top block to make the cavity depth of the second test coil 4.3mm; connect the second test coil to the fluxmeter with the connecting wire, and turn on the fluxmeter power supply; set the range to 20mWb, and adjust the "zeroing" knob of the fluxmeter until the fluxmeter display value is zero; place one end of the magnet used in the 1JB10-1 type relay into the coil cavity, allowing it to be in a free state, and then press the "zeroing" button; at this time, the display value is zero; remove the magnet from a height of more than 50mm from the test clamp 3; the displayed value at this time is the magnetic flux of the magnet. By comparing with the specified value, magnets with unqualified magnetic properties are rejected.

[0031] Implementation Method 2: The relay test piece was a military-grade electromagnetic relay, model 2JL0.5-1. Measurements were performed using test coil number two, with the cavity depth adjusted to 3.0 mm. The specific operating method was the same as in implementation method 1.

[0032] Implementation Method 3: The relay test piece was a military-grade electromagnetic relay, model 4JRB-4. Measurements were performed using a No. 3 test coil, with the cavity depth adjusted to 5.0 mm. The specific operating method was the same as in Implementation Method 1.

[0033] Implementation Example 4: The relay test piece was a military-grade electromagnetic relay, model 4JL2-1. Measurements were performed using test coil number two, with the cavity depth adjusted to 4.3 mm. The specific operating method was the same as in implementation method 1.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rapid screening and testing device for electromagnetic relay magnets, characterized in that, include: A fluxmeter, a test coil, a positioning mechanism, and a clamping body; wherein the positioning mechanism is disposed inside the clamping body, the test coil is disposed above the positioning mechanism, and the test coil is electrically connected to the fluxmeter; The positioning mechanism includes a fixing block with multiple insertion holes. A top block is inserted into each insertion hole, and a positioning bolt is provided on the side of the insertion hole. The positioning bolt is used to fix the position of the top block in the insertion hole. The test coil includes a skeleton cavity disposed on the upper part of the clamping body and a coil covering the skeleton cavity, the size of the skeleton cavity being matched with the size of the magnet of the electromagnetic relay to be tested.

2. The rapid screening and testing device for electromagnetic relay magnets according to claim 1, characterized in that: The clamp body is made of non-magnetic material, and the coil is made of enameled wire.

3. The rapid screening and testing device for electromagnetic relay magnets according to claim 1, characterized in that: The fixing block has a stepped structure and is fixed inside the clamping body by fixing bolts.

4. The rapid screening and testing device for electromagnetic relay magnets according to claim 1, characterized in that: The fixing block, the top block, and the positioning bolt are all made of non-magnetic metal materials.

5. The rapid screening and testing device for electromagnetic relay magnets according to claim 1, characterized in that: The clamp body has a terminal block on its side, and the terminal block is connected to the lead wire of the test coil.

6. The rapid screening and testing device for electromagnetic relay magnets according to claim 1, characterized in that, The skeleton cavity is fixed to the fixing block by skeleton fixing bolts.

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