Thrust testing device for opening and closing coil of circuit breaker

Abstract

The utility model relates to the technical field of electric or magnetic variable measurement, in particular to a thrust testing device for an opening and closing coil of a circuit breaker. The breaker opening and closing coil thrust testing device comprises a testing support, a longitudinal moving frame is arranged on the testing support, a vertical moving frame is arranged on the longitudinal moving frame, a coil mounting seat is arranged on the vertical moving frame, the vertical moving frame is movably matched with the testing frame along the Y direction in a three-dimensional coordinate system in a guiding mode, and the coil mounting seat is arranged on the vertical moving frame. The vertical moving frame is movably matched with the longitudinal moving frame in the Z direction in a guiding mode in the three-dimensional coordinate system, the coil installation base is movably matched with the vertical moving frame in the X direction in the three-dimensional coordinate system in a guiding mode, the test support is further provided with a thrust meter, the thrust meter is located on one side of the coil installation base in the X direction, and the thrust meter comprises a force measuring probe. The force measuring probe can stretch out and draw back in the X direction. The utility model solves the problem that the position of the measured coil cannot be adjusted in all directions and the measured coil cannot adapt to more models of coils when the thrust of the opening and closing coil is measured.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement of electric or magnetic variables, in particular to a device for testing the thrust of the opening and closing coils of a circuit breaker. Background Art

[0002] As an electrical switching device, a circuit breaker is widely used in high-voltage switches in the power system. The circuit breaker mainly triggers a protection action based on abnormal changes in current. Among them, the opening and closing coils of the circuit breaker, as the control elements of the circuit breaker operation, are key components in the operating mechanism of the circuit breaker.

[0003] The opening and closing coils of the circuit breaker mainly generate a magnetic field through the principle of electromagnetic induction, causing the mechanism to move, so as to achieve the purpose of opening and closing the circuit. The opening and closing coils of the circuit breaker mainly include components such as coils, iron cores, and mechanical latches. Among them, the coil is closely wound around the iron core to form an electromagnet unit with the iron core. When current passes through the coil, a magnetic field will be formed in the iron core. When the current in the coil reaches a specific value, the magnetic field is sufficient to cause the ejector rod connected to the coil to push the mechanical latch to act, driving the mechanism to move, and realizing the opening and closing operation of the circuit breaker.

[0004] After long-term use, a large number of opening and closing operations will cause the coil to age or displace. After the coil ages or displaces, the resistance value will change, resulting in a change in the current passing through the coil, causing a change in the magnetic field formed in the iron core, and the thrust generated by the electromagnet unit will also change, thereby affecting the accuracy and reliability of the opening and closing operation. In severe cases, the opening and closing coils will be burned out.

[0005] In the prior art, the above problems are often solved by replacing the opening and closing coils or adjusting the coil position. However, when replacing the coil or adjusting the coil position, it is impossible to judge the magnitude of the thrust generated by the electromagnet unit, and it is necessary to repeatedly debug the coil position to determine the thrust. This makes the circuit breaker need to perform opening and closing operations frequently, which is not only time-consuming and laborious, but also reduces the service life of the circuit breaker.

[0006] The Chinese utility model patent with the authorization announcement number CN208125315 discloses a mechanical force measuring device for a closing and opening coil. The device includes a base, on which a force measuring device and a fixing part for the closing and opening coil are arranged. The force measuring device is fixedly connected to the base, and the fixing part for the closing and opening coil is fixedly connected to the base; the size of the fixing part for the closing and opening coil can be adjusted according to the size of the measured coil, and the closing and opening coil is fixed on the fixing part for the closing and opening coil. The detection end of the force measuring device is located in the moving direction of the push rod in the closing and opening coil. After the closing and opening coil is energized, the push rod in the closing and opening coil impacts the detection end of the force measuring device, and the detection end of the device will record the instantaneous force data when being impacted. By selecting a numerical processing method, the mechanical force of the closing and opening coil can be calculated. Although this measuring device solves the technical problem of the difficult quantitative detection of the mechanical force of the push rod on the closing and opening coil in the prior art, the device limits the placement position of the measured closing and opening coil, and cannot move the position of the measured closing and opening coil up, down, left, or right, restricting the range of the measured closing and opening coil and unable to adapt to more models of closing and opening coils. Utility Model Content

[0007] The purpose of the present utility model is to provide a thrust test device for a circuit breaker closing and opening coil to solve the problem in the prior art that the position of the measured closing and opening coil cannot be adjusted up, down, left, or right during the measurement of the thrust of the closing and opening coil and cannot adapt to more models of closing and opening coils.

[0008] To solve the above problems, the thrust test device for a circuit breaker closing and opening coil of the present utility model adopts the following technical solutions: A thrust test device for a circuit breaker closing and opening coil includes a test bracket, on which a longitudinal moving frame is arranged, on the longitudinal moving frame a vertical moving frame is arranged, and on the vertical moving frame a coil mounting seat is arranged. Among them, the vertical moving frame is in guiding and movable cooperation with the test frame along the Y direction in a three-dimensional coordinate system, the vertical moving frame is in guiding and movable cooperation with the longitudinal moving frame along the Z direction in the three-dimensional coordinate system, the coil mounting seat is in guiding and movable cooperation with the vertical moving frame along the X direction in the three-dimensional coordinate system. A thrust meter is also installed on the test bracket, and the thrust meter is located on one side of the coil mounting seat in the X direction. The thrust meter includes a force measuring probe, and the force measuring probe can expand and contract in the X direction.

[0009] Further, the thrust meter is installed on the test bracket through a bottom box, and a power supply module for supplying power to the test coil is arranged in the bottom box.

[0010] Further, an electrical connector is arranged on one side wall of the bottom box, and a test wire for connecting with the coil is connected to the electrical connector.

[0011] Further, a groove is arranged on the top of the bottom box, and one end of the thrust meter close to the force measuring probe is embedded into the groove.

[0012] Furthermore, scales distributed along the X direction are provided on the vertical moving frame for reference to adjust the position of the coil.

[0013] Furthermore, the scales are directly formed on the surface of the vertical moving frame.

[0014] Furthermore, the longitudinal moving frame is guidingly and movably installed on the test frame by matching a longitudinal sliding block with a longitudinal sliding groove provided on the test frame. A locking bolt is provided on the longitudinal sliding block, and a locking nut for locking the sliding block on the test frame is installed on the locking bolt.

[0015] Furthermore, the vertical moving frame is guidingly and movably installed on the longitudinal moving frame by matching a vertical sliding block with a vertical sliding groove provided on the longitudinal moving frame. A locking bolt is provided on the vertical sliding block, and a locking nut for locking the sliding block on the longitudinal moving frame is installed on the locking bolt.

[0016] Furthermore, the locking nut is a wing nut.

[0017] Beneficial effects: The opening and closing coil thrust testing device of the utility model is an improved invention. Through this solution, when an operator tests the opening and closing coil thrust, the coil to be tested is fixed on the coil mounting seat arranged on the vertical moving frame, and then by controlling the coil mounting seat to guide and move along the X direction on the vertical moving frame, the vertical moving frame to guide and move along the Z direction on the longitudinal moving frame, and the longitudinal moving frame to guide and move along the Y direction with the test frame, the position of the coil to be tested for opening and closing is adjusted, so that the coil to be tested for opening and closing can move omnidirectionally on the test frame, ensuring that the axis of the ejector rod of the coil to be tested for opening and closing is consistent with the axis of the force measuring probe of the thrust gauge. Under the combined action of the coil mounting seat, the vertical moving frame and the longitudinal moving frame, the position of the coil to be tested can be adjusted omnidirectionally during the process of testing the opening and closing coil thrust, so that the utility model can be applicable to the testing of the opening and closing coil thrust with different shapes and sizes. The test frame of the utility model provides a position basis for the movement of the opening and closing coil to be tested and also makes the structure of the device more stable and reliable during the testing process. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the use state of an embodiment of the opening and closing coil thrust testing device of the utility model.

[0019] In the figure: 1. Test frame; 1-1. Vertical moving frame; 1-2. Longitudinal moving frame; 1-3. Wing nut; 2. Thrust gauge bottom box; 2-1. Power supply module; 2-2. Test switch; 2-3. Electrical connector; 2-4. Inner wire of the thrust gauge bottom box; 2-5. Thrust gauge; 2-6. Test wire; 3. Coil to be tested for opening and closing. Detailed Embodiments

[0020] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.

[0021] The present utility model utilizes the principle of a three-axis platform to install the coil under test, enabling the position adjustment of the coil under test in three-dimensional space to align it with the thrust meter, thereby being applicable to the testing of various different types of coils.

[0022] As a basic solution, the circuit breaker closing and opening coil thrust testing device of the present utility model includes a test stand 1, as Figure 1 shown. A longitudinal moving frame 1-2 is provided on the test stand 1. The longitudinal moving frame 1-2 is in guiding and movable cooperation with the test stand 1 along the Y direction in a three-dimensional coordinate system on the test stand 1; a vertical moving frame 1-1 is provided on the longitudinal moving frame 1-2. The vertical moving frame 1-1 is in guiding and movable cooperation with the longitudinal moving frame 1-2 along the Z direction in the three-dimensional coordinate system; a coil mounting seat for mounting the closing and opening coil 3 under test is provided on the vertical moving frame 1-1. The coil mounting seat is in guiding and movable cooperation with the vertical moving frame 1-1 along the X direction in the three-dimensional coordinate system. By adjusting the position of the coil mounting seat on the vertical moving frame 1-1, the position of the vertical moving frame 1-1 on the longitudinal moving frame 1-2, and the position of the longitudinal moving frame 1-2 on the test stand 1, the purpose that the closing and opening coil 3 under test can move without restriction of orientation within the test stand 1 can be achieved. A thrust meter 2-5 is also installed on the test stand 1. The thrust meter 2-5 is located on one side of the coil mounting seat in the X direction. The thrust meter 2-5 includes a force measuring probe. The force measuring probe can extend and retract in the X direction. During the test, the push rod of the closing and opening coil 3 under test will strike the force measuring probe. The extension and retraction of the force measuring probe are the key for the thrust meter 2-5 to read the thrust of the coil under test.

[0023] As a preferred implementation manner, the thrust meter 2-5 is installed on the test stand 1 through a thrust meter bottom box 2. The thrust meter 2-5 is fixed on the thrust meter bottom box 2. The axis of the force measuring probe of the thrust meter is parallel to the X direction. The thrust meter bottom box 2 provides a safe and reliable fixed platform for the thrust meter 2-5, so that the thrust meter 2-5 can be firmly fixed on the test stand 1, making the thrust meter 2-5 stable and immovable during the test and not generating displacement due to the force of the ejector rod of the closing and opening coil 3 under test on the force measuring probe of the thrust meter, ensuring the accuracy of the test data. A power supply module 2-1 for supplying power to the test coil is provided in the bottom box 2. The power supply module 2-1 provides a source of closing and opening signals for the closing and opening coil 3 under test during the test, enabling the closing and opening coil 3 under test not to require a separate external power supply, which is more convenient and fast. In other implementation manners, the power supply module may not be provided, and the test can also be carried out through an external power supply.

[0024] As a preferred embodiment, an electrical connector 2-3 is provided on one side wall of the bottom box 2, and a test wire 2-6 for connecting with a coil is connected to the electrical connector 2-3. The electrical connector 2-3 is connected to a test switch 2-2 and a power supply module 2-1 inside the bottom box of the thrust meter through an internal wire 2-4 of the bottom box of the thrust meter inside the bottom box 2 of the thrust meter. The power supply module is connected to the measured closing and opening coil, and the power supply module can supply power to the measured coil instead of an external power supply. The power supply module 2-1 transmits an electrical signal to the electrical connector 2-3 through the internal wire 2-4 of the bottom box of the thrust meter, and the electrical connector 2-3 then transmits the signal to the measured closing and opening coil 3 through the test wire 2-6, enabling the closing and opening coil 3 to be powered on and work, where the test switch 2-2 controls the power supply module 2-1.

[0025] As a preferred embodiment, a groove is provided on the top of the bottom box 2 of the thrust meter, and one end of the thrust meter 2-5 close to the force measuring probe is embedded in the groove. The groove on the top of the bottom box 2 of the thrust meter clamps the thrust meter 2-5, so that the thrust meter 2-5 can still remain stable when being pushed by the coil push rod. Similarly, bolts and nuts can also be used to fix the thrust meter on the bottom box, but holes need to be drilled in the thrust meter for placing the bolts when using bolts and nuts, which may affect the accuracy of the thrust meter.

[0026] As a preferred embodiment, scales distributed along the X direction are provided on the vertical moving frame 1-1 for referring to and adjusting the position of the coil. The scales are directly opened on the surface of the vertical moving frame 1-1. An obvious scale can better adjust and record the position of the measured closing and opening coil 3, thereby ensuring that the measurement and record of the thrust magnitudes at different positions of the measured coil are more accurate. Alternatively, a separate scale can be fixed on the vertical moving support, and the position of the measured coil can also be observed and recorded; stickers with printed scales can also be pasted on the vertical moving support, and their effects are the same as those of the scales engraved on the vertical moving frame.

[0027] As a preferred embodiment, the longitudinal moving frame 1-2 is installed on the test frame 1 in a guiding and movable manner through cooperation with longitudinal sliders and longitudinal chutes provided on the test frame 1. The chute provides a more convenient installation position for the guiding and movable installation of the longitudinal moving frame 1-2, and also provides a guiding track for the movement of the longitudinal moving frame 1-2, making the movement process of the longitudinal moving frame 1-2 more reliable and convenient. During the movement process of the longitudinal moving frame 1-2, the slider drives the vertical moving frame to move. A locking bolt is provided on the longitudinal slider, and a locking nut for locking the slider on the test frame is installed on the locking bolt. The longitudinal moving frame is installed on the test frame 1 more stably and reliably through the cooperation of the bolt and the nut. Specifically, when the end face of the locking nut is tightly pressed against the longitudinal moving frame, the slider can be locked relative to the longitudinal moving frame. In addition to using the bolt and nut to install the longitudinal moving frame, the screw rod and nut can also be used to install the longitudinal moving frame through screw thread and nut cooperation.

[0028] As a preferred embodiment, the vertical moving frame 1-1 is guidingly and movably installed on the vertical moving frame 1-1 by means of vertical sliders cooperating with the vertical sliding grooves provided on the longitudinal moving frame 1-2. The sliding grooves provide a more convenient installation position for the guiding and movable installation of the vertical moving frame 1-1, and also provide a guiding track for the movement of the vertical moving frame 1-1, making the movement process of the vertical moving frame 1-1 more reliable and convenient. During the movement of the vertical moving frame 1-1, the sliders drive the vertical moving frame 1-1 to move. A locking bolt is provided on the vertical slider, and a locking nut for locking the slider on the longitudinal moving frame 1-2 is installed on the locking bolt. Through the cooperation of the bolt and the nut, the vertical moving frame 1-1 is installed on the longitudinal moving frame 1-2 more stably and reliably. Similarly, a lead screw nut can be used to install the vertical moving frame through the cooperation of the thread and the nut.

[0029] As a preferred embodiment, the locking nut is a wing nut. During the use of the device, it is necessary to adjust the tightening degree of the bolt and nut multiple times to achieve the sliding of each bracket. By using a wing nut, a wrench is no longer needed during the process of turning the nut, which simplifies the work process and improves work efficiency.

[0030] The implementation process of this embodiment is as follows: The measured closing and opening coil 3 is installed on the coil mounting seat on the vertical moving frame 1-1 through bolts and wing nuts 1-3. By adjusting the position of the vertical moving frame 1-1 on the longitudinal moving frame 1-2 and the position of the longitudinal moving frame 1-2 on the test frame 1, the axis of the ejector rod of the measured closing and opening coil 3 is aligned with the force measuring probe of the thrust meter 2-5; then adjust the position of the coil mounting seat on the vertical moving frame 1-1 to ensure an appropriate distance between the measured closing and opening coil 3 and the force measuring probe of the thrust meter 2-5; connect the test wire 2-6 to the electrical connector 2-3; press the test switch 2-2, and the measured closing and opening coil 3 is powered on to start working. The ejector rod connected to the coil impacts the force measuring probe of the thrust meter 2-5, and the impact force value received is displayed on the display screen of the thrust meter 2-5, which is the thrust of the measured closing and opening coil 3. Record the position of adjusting the measured closing and opening coil 3 through the scale engraved on the vertical moving frame 1-1, and change the coil position multiple times to obtain the thrust magnitudes at different positions of the measured closing and opening coil 3.

[0031] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. A tripping and closing coil thrust testing device for a circuit breaker, characterized in that It includes a test bracket, on which a longitudinal moving frame is provided, on the longitudinal moving frame a vertical moving frame is provided, and on the vertical moving frame a coil mounting seat is provided. Among them, the longitudinal moving frame is in guiding and movable cooperation with the test frame along the Y direction in a three-dimensional coordinate system, the vertical moving frame is in guiding and movable cooperation with the longitudinal moving frame along the Z direction in the three-dimensional coordinate system, and the coil mounting seat is in guiding and movable cooperation with the vertical moving frame along the X direction in the three-dimensional coordinate system. A thrust meter is also installed on the test bracket, and the thrust meter is located on one side of the coil mounting seat in the X direction. The thrust meter includes a force measuring probe, and the force measuring probe can be telescopic in the X direction.

2. The circuit breaker closing and opening coil thrust testing device according to claim 1, characterized in that, The thrust meter is installed on the test frame through a bottom box, and a power supply module for supplying power to the test coil is provided in the bottom box.

3. The circuit breaker closing and opening coil thrust testing device according to claim 2, wherein An electrical connector is provided on one side wall of the bottom box, and a test wire for connecting with the coil is connected to the electrical connector.

4. The circuit breaker closing and opening coil thrust testing device according to claim 2 or 3, characterized in that, A groove is provided on the top of the bottom box, and one end of the thrust meter close to the force measuring probe is embedded into the groove.

5. The circuit breaker closing and opening coil thrust testing device according to claim 1, characterized in that, Scales distributed along the X direction are provided on the vertical moving frame for referring to and adjusting the position of the coil.

6. The circuit breaker closing and opening coil thrust testing device according to claim 5, wherein The scales are directly opened on the surface of the vertical moving frame.

7. The closing and opening coil thrust testing device for a circuit breaker according to claim 1, characterized in that The longitudinal moving frame is installed on the test frame in a guiding and movable manner through longitudinal sliders cooperating with longitudinal chutes provided on the test frame. A locking bolt is provided on the longitudinal slider, and a locking nut for locking the slider on the test frame is installed on the locking bolt.

8. The opening and closing coil thrust test device for a circuit breaker according to claim 7, characterized in that The locking nut is a wing nut.

9. The circuit breaker closing and opening coil thrust testing device according to claim 1, characterized in that, The vertical moving frame is installed on the longitudinal moving frame in a guiding and movable manner through vertical sliders cooperating with vertical chutes provided on the longitudinal moving frame. A locking bolt is provided on the vertical slider, and a locking nut for locking the slider on the longitudinal moving frame is installed on the locking bolt.

10. The breaker closing and opening coil thrust testing device according to claim 9, characterized in that, The locking nut is a wing nut.

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