Control mechanism testing device

Abstract

The invention relates to the field of testing of circuit interrupters, switches or circuit breakers, in particular to an operating mechanism testing device which comprises a frame, a transmission shaft is arranged in the frame, a load power shaft connected with an operating mechanism is arranged outside the frame, the load power shaft is connected with the transmission shaft, and a closing crank arm and an opening crank arm are installed on the transmission shaft in a rotation stopping mode. An opening load simulation device for simulating an opening load and a closing load simulation device for simulating a closing load are arranged in the frame, the opening crank arm is connected with the opening load simulation device, and the closing crank arm is connected with the closing load simulation device. According to the invention, the opening load of the circuit breaker is simulated through the cooperation of the opening crank arm and the opening load simulation device; the closing load of the circuit breaker is simulated through the cooperation of the closing crank arm and the closing load simulation device; therefore, the device can replace an expensive circuit breaker in a test, and the problem that the test cost of an existing control mechanism is too high is solved.

Description

Technical Field

[0001] The invention relates to the field of testing circuit interrupters, switches or circuit breakers, and in particular to a control mechanism testing device. Background Art

[0002] The finished product of the operating mechanism generally needs to undergo hundreds of life tests and parameter tests before leaving the factory, and can only be shipped after passing the test. The life and parameter tests of the operating mechanism require an actual or nearly actual application environment. In the existing technical solutions, the operating mechanism needs to be directly connected to the circuit breaker during the test in order to perform life and parameter tests. The corresponding parameters are obtained through actual working conditions. However, the circuit breaker is expensive and is easily damaged during the test, and the cost of the entire test is too high. Summary of the invention

[0003] The object of the present invention is to provide a control mechanism testing device to solve the problem that the existing control mechanism testing cost is too high.

[0004] In order to solve the above problems, the solution in the present invention is:

[0005] A control mechanism testing device comprises a frame, a transmission shaft is arranged inside the frame, a load power shaft connected to the control mechanism is arranged outside the frame, the load power shaft is connected to the transmission shaft, a closing crank arm and an opening crank arm are non-rotatably mounted on the transmission shaft, an opening load simulation device for simulating the opening load and a closing load simulation device for simulating the closing load are arranged inside the frame, the opening crank arm is connected to the opening load simulation device, and the closing crank arm is connected to the closing load simulation device.

[0006] The present invention provides an operating mechanism testing device, which simulates the opening load of a circuit breaker by cooperating an opening crank arm with an opening load simulation device; simulates the closing load of a circuit breaker by cooperating a closing crank arm with a closing load simulation device; and truly simulates the working state of the circuit breaker by the opening and closing load simulation device, so as to achieve the effect of replacing an expensive circuit breaker in the test by the device, thereby solving the problem of excessively high cost of existing operating mechanism testing.

[0007] Furthermore, the closing load simulation device includes: a compression spring, a buffer rod and a buffer sleeve; one end of the buffer rod is movably connected to the closing crank arm, and the other end cooperates with the buffer sleeve plug-in sleeve; the compression spring is sleeved on the buffer rod and supported between the buffer sleeve and the buffer rod, and the buffer sleeve is installed on the frame.

[0008] The advantages are: the closing load simulation device composed of the compression spring, the buffer rod and the buffer sleeve is closer to the closing buffer device of the circuit breaker; it is easy to install, and it is easy to find replacement parts if damage occurs, and replacement is convenient.

[0009] Furthermore, the buffer sleeve is mounted on the frame in an adjustable position in its axial direction.

[0010] The advantages are: when the position of the buffer sleeve in the axial direction changes, the distance between the buffer sleeve and the buffer rod, that is, the length of the compression spring, changes accordingly, and the initial elastic force of the compression spring also changes accordingly. By adjusting the initial pressure of the spring, the simulated load can be adjusted to a situation close to the load in the circuit breaker, so as to better simulate the initial pressure of the circuit breaker contact.

[0011] Furthermore, the buffer sleeve is inserted into the insertion hole on the frame, the buffer sleeve has a threaded section, an adjusting nut is screwed onto the threaded section, the adjusting nut is located on the side of the insertion hole close to the compression spring, and the adjusting nut is engaged with the hole edge of the insertion hole.

[0012] The advantages are: by adjusting the nut, the thread and the insertion hole, the axial position of the buffer sleeve can be easily adjusted. In addition, the adjusting nut, the thread and the insertion hole are easy to manufacture, install and replace.

[0013] Furthermore, the closing crank arm is connected to the buffer rod through a pin shaft; a closing roller is installed on the closing crank arm, and the closing roller and the buffer rod roll and press against each other so that when the crank arm swings, pressure is applied to the buffer rod through the closing roller.

[0014] The advantage is that the sliding friction between the closing crank arm and the buffer rod is converted into rolling friction by the closing roller, thereby extending the service life of the buffer rod and the closing crank arm.

[0015] Furthermore, the opening brake load simulation device includes a hydraulic buffer for providing a simulated load for the opening brake lever arm.

[0016] The advantage is that since the opening force of the circuit breaker is small, the opening simulation device simulating the load does not need to be overloaded, and a hydraulic buffer can be used. At the same time, the hydraulic buffer is closer to the circuit breaker opening buffer device, so the use of the hydraulic buffer can not only achieve a good simulation effect, but also save costs.

[0017] Furthermore, a brake-opening auxiliary compression spring assembly is connected to the transmission shaft.

[0018] The advantage is that an opening auxiliary compression spring assembly is also provided in an actual circuit breaker, and installing the opening auxiliary compression spring assembly can be closer to the actual situation of circuit breaker opening.

[0019] Furthermore, three closing lever arms are provided and arranged side by side.

[0020] The advantages are: three closing lever arms are provided to simulate a three-phase circuit breaker, which is closer to actual use and the test is more realistic.

[0021] Furthermore, a fixing plate is provided on one side of the frame where the load power shaft is installed, and a fixing device for fixing the operating mechanism is provided on the outer side of the fixing plate.

[0022] The advantage is that the operating mechanism and the testing mechanism are connected into a whole, thus saving space.

[0023] Furthermore, the transmission shaft is a prismatic shaft, and the opening lever arm and the closing lever arm are mounted on the transmission shaft through holes adapted to the shape of the transmission shaft.

[0024] The advantages are: the transmission shaft adopts a prism shaft, and a hole adapted to the shape of the transmission shaft is opened on the crank arm, which is easy to install and does not require secondary processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : a front view of a first embodiment of a control mechanism testing device of the present invention;

[0026] Figure 2 : a side view of a first embodiment of the control mechanism testing device of the present invention;

[0027] Figure 3 : a top view of a first embodiment of a control mechanism testing device of the present invention;

[0028] Figure 4 The figure is an axonometric view of the first embodiment of the control mechanism testing device of the present invention;

[0029] Figure 5 : a front view of the first embodiment of the operating mechanism testing device of the present invention (the frame is not shown);

[0030] Figure 6 : a side view of the first embodiment of the control mechanism testing device of the present invention (the frame is not shown);

[0031] Figure 7 : A top view of the first embodiment of the control mechanism testing device of the present invention (the frame is not shown);

[0032] Figure 8 : An axonometric view of the first embodiment of the operating mechanism testing device of the present invention (the frame is not shown).

[0033] In the figure: 1, load power shaft; 2, transmission shaft; 301, closing lever; 3021, buffer rod; 3022, buffer sleeve; 3023, compression spring; 303, closing roller; 304, adjusting nut; 401, opening lever; 402, hydraulic buffer. ; 403, opening auxiliary compression spring assembly (4031, opening power shaft; 4032, opening power spring; 4033, opening power shaft sliding plate). DETAILED DESCRIPTION

[0034] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0035] Embodiment 1 of the control mechanism testing device of the present invention:

[0036] like Figure 1-8 As shown: the operating mechanism simulation test device is provided with a frame, a transmission shaft 2 is rotatably installed in the frame, and a load power shaft 1 connected to the operating mechanism is provided outside the frame, and the load power shaft 1 is connected to the transmission shaft 2. Of course, in other embodiments, the load power shaft 1 and the transmission shaft 2 are the same shaft. A closing crank arm 301 and an opening crank arm 401 are fixed on the transmission shaft 2, and an opening load simulation device for simulating the opening load and a closing load simulation device for simulating the closing load are arranged in the frame, the opening crank arm 401 is connected to the opening load simulation device, and the closing crank arm 301 is connected to the closing load simulation device. The opening load of the circuit breaker is simulated by the cooperation of the opening crank arm 401 and the opening load simulation device; the closing load of the circuit breaker is simulated by the cooperation of the closing crank arm 301 and the closing load simulation device; the working state of the circuit breaker is truly simulated by the opening and closing load simulation device, so as to achieve the effect of replacing the expensive circuit breaker in the test by the device, and solve the problem of the high cost of the existing operating mechanism test.

[0037] The frame is provided with a fixing plate on one side where the load power shaft 1 is installed, and a fixing device for fixing the operating mechanism is arranged outside the fixing plate. The operating mechanism and the test mechanism are connected into a whole through the fixing plate, which saves space.

[0038] The transmission shaft 2 is a hexagonal shaft, and the opening and closing crank arms 401 and the closing crank arms 301 are installed on the transmission shaft 2 through hexagonal holes that are adapted to the shape of the transmission shaft 2. The transmission shaft 2 forms a profile fit with the opening and closing crank arms 401 and the closing crank arms 301 through the surface of the hexagonal shaft to achieve a non-rotation effect. The cooperation of the hexagonal shaft and the hexagonal hole can achieve the effect of easy installation without the need for secondary processing. Of course, in other embodiments, the shape of the transmission shaft 2 can be a pentagonal shaft, a square shaft, or more or fewer edges; however, the edges should not be too many, as too many edges will make the transmission shaft approximate a cylindrical shaft, making it difficult for the transmission shaft 2 to form a profile fit with the crank arm to achieve a non-rotation effect. Of course, the transmission shaft and the crank arm can also be welded or a bolt is inserted into one side of the crank arm and tightened to form a non-rotation fit with the transmission shaft 2.

[0039] Only one opening lever arm 401 is provided. Three closing lever arms 301 are provided and arranged side by side, and a closing buffer device is connected under each closing lever arm 301. Three closing lever arms are provided to simulate a three-phase circuit breaker, which is closer to the actual use situation and the test is more realistic. However, in other embodiments, the number of closing lever arms may be more or less, as long as the total closing simulation load can reach the closing load of the circuit breaker.

[0040] The closing crank arm 301 is connected to the closing load simulation device through a cylindrical pin. The closing load simulation device includes: a compression spring 3023, a buffer rod 3021 and a buffer sleeve 3022; one end of the buffer rod 3021 is connected to the closing crank arm 301, and the other end is matched with the buffer sleeve 3022 plug-in sleeve; the compression spring 3023 is sleeved on the buffer rod 3021 and supported between the buffer sleeve 3022 and the buffer rod 3021, and the buffer sleeve 3022 is installed on the beam set in the frame with an adjustable position in its axial direction. The closing load simulation device composed of the compression spring 3023, the buffer rod 3021 and the buffer sleeve 3022 is closer to the closing buffer device of the circuit breaker; it is easy to install during installation, and it is also easy to find a replacement part if it is damaged, and it is convenient to replace.

[0041] A long hole in the vertical direction is provided at the connection between the buffer rod 3021 and the closing crank arm 301, and the width of the long hole is greater than the diameter of the cylindrical shaft pin; the connection hole in the vertical direction is provided at the connection, and the long hole with a width greater than the diameter of the cylindrical shaft pin can provide a certain amount of up and down floating for the buffer rod, and provide a certain space for the closing crank arm to drive the cylindrical shaft pin to move, causing the cylindrical shaft pin to change its position in the horizontal direction; the cylindrical pin shaft passes through the long hole to connect the closing crank arm 301 with the buffer rod 3021; ​​two closing rollers 303 are installed on both sides of the crank arm, and the closing rollers 303 are mounted on the cylindrical pin shaft. The closing rollers 303 and the buffer rod 3021 roll and press against each other, so that when the crank arm swings, the closing rollers 303 apply pressure to the buffer rod 3021. The sliding friction generated between the closing crank arm 301 and the buffer rod 3021 is converted into rolling friction by the closing rollers 303, thereby extending the service life of the closing crank arm 301 and the closing load simulation device.

[0042] The bottom of the buffer sleeve 3022 extends downwardly out of a rod-shaped structure, and the extension rod portion is inserted into the insertion hole on the frame crossbeam. The extension rod portion is provided with a threaded section, and an adjusting nut 304 is screwed on the threaded section. The adjusting nut 304 is located on the side of the insertion hole close to the compression spring 3023, and the adjusting nut 304 is matched with the hole edge of the insertion hole. The position of the buffer sleeve 3022 in the axial direction is adjusted by rotating the adjusting nut 304. By changing the position of the buffer sleeve 3022 in the vertical direction, the distance between the buffer sleeve 3022 and the buffer rod 3021, that is, the length of the compression spring 3023, changes accordingly, and the initial elastic force of the compression spring 3023 also changes accordingly. The simulated load can be adjusted to a situation similar to the load in the circuit breaker by adjusting the initial pressure of the spring, so as to better simulate the initial pressure of the circuit breaker contact. By adjusting the cooperation of the nut 304, the thread and the insertion hole, the axial position of the buffer sleeve 3022 can be easily adjusted. In addition, the adjusting nut 304, the thread and the insertion hole are easy to manufacture, install and replace. Depending on the operating mechanism, the initial pressure of the spring can be adjusted by adjusting the position of the nut 304 on the buffer sleeve 3022 to simulate the initial pressure of different circuit breakers. However, if the operating mechanism under test is consistent and the simulated circuit breaker is also the same, the buffer sleeve 3022 can be directly fixed on the beam without setting the adjusting nut 304.

[0043] The opening load simulation device includes a hydraulic buffer 402 that provides a simulated load for the opening crank arm 401. Since the opening force is small when the circuit breaker is opened, the opening simulation device of the simulated load does not need to be overloaded, and the hydraulic buffer 402 can be used. At the same time, the hydraulic buffer 402 is closer to the circuit breaker opening buffer device, so the use of the hydraulic buffer 402 can not only achieve a good simulation effect, but also save costs.

[0044] An opening auxiliary compression spring assembly is connected to the transmission shaft 2. An opening auxiliary compression spring assembly is also provided in an actual circuit breaker, and installing the opening auxiliary compression spring assembly can be closer to the actual situation of the circuit breaker opening.

[0045] During operation, first adjust the initial elastic force of the compression spring 3023 by adjusting the nut 304 to simulate the load of the contacts when the circuit breaker is closed; perform closing simulation: the operating mechanism drives the load power shaft 1 to move rapidly at a certain angle, the load power shaft 1 drives the transmission shaft 2 and the crank arm on the transmission shaft 2 to move rapidly at a certain angle, the closing crank arm 301 applies pressure to the buffer rod 3021 downward through the closing roller 303, and the opening crank arm 401 stretches the hydraulic buffer 402 to complete the closing simulation.

[0046] Perform opening simulation: the operating mechanism drives the load power shaft 1 to quickly return to the initial position, the load power shaft 1 drives the transmission shaft 2 and the crank arm on the transmission shaft 2 to quickly reset, and the opening pressure block applies pressure to the hydraulic buffer 402 to complete the opening simulation.

[0047] Embodiment 2 of the operating mechanism testing device of the present invention: The difference between this embodiment and embodiment 1 is that the closing load simulation device is a hydraulic buffer device.

[0048] Embodiment 3 of the operating mechanism testing device of the present invention: The difference between this embodiment and embodiment 1 is that the opening switch arm 401 is connected to an opening switch load simulation device having the same structure as the closing switch load simulation device, the load of the opening switch load device is smaller than that of the closing switch load device, and a through hole is provided on the frame beam for the opening switch buffer block to pass through.

[0049] Embodiment 4 of the operating mechanism testing device of the present invention: The difference between this embodiment and embodiment 1 lies in that: a plurality of adjustment holes are arranged on the extension rod of the closing buffer block, the adjustment holes penetrate the extension rod of the buffer sleeve, a pin is arranged in the adjustment hole, and the pin and the hole of the insertion hole form a stop fit in the direction away from the closing crank arm, and the position of the buffer sleeve is adjusted by the fit between the adjustment hole and the pin, thereby adjusting the initial pressure of the compression spring.

[0050] The above description 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 shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A control mechanism testing device, characterized in that: The invention comprises a frame, a transmission shaft (2) is arranged inside the frame, a load power shaft (1) connected to an operating mechanism is arranged outside the frame, the load power shaft (1) is connected to the transmission shaft (2), a closing crank arm (301) and an opening crank arm (401) are fixedly mounted on the transmission shaft (2), an opening load simulation device for simulating an opening load and a closing load simulation device for simulating a closing load are arranged inside the frame, the opening crank arm (401) is connected to the opening load simulation device, and the closing crank arm (301) is connected to the closing load simulation device.

2. The control mechanism testing device according to claim 1, characterized in that: The closing load simulation device comprises: a compression spring (3023), a buffer rod (3021) and a buffer sleeve (3022); one end of the buffer rod (3021) is movably connected to the closing crank arm (301), and the other end is plug-in-matched with the buffer sleeve (3022); the compression spring (3023) is sleeved on the buffer rod (3021) and supported between the buffer sleeve (3022) and the buffer rod (3021), and the buffer sleeve (3022) is installed on the frame.

3. The control mechanism testing device according to claim 2, characterized in that: The buffer sleeve (3022) is mounted on the frame in an adjustable position in its axial direction.

4. The control mechanism testing device according to claim 3, characterized in that: The buffer sleeve (3022) is inserted into the insertion hole on the frame. The buffer sleeve (3022) has a threaded section, and an adjusting nut (304) is screwed onto the threaded section. The adjusting nut (304) is located on a side of the insertion hole close to the compression spring (3023), and the adjusting nut (304) is matched with the hole edge of the insertion hole.

5. The operating mechanism testing device according to any one of claims 2 to 4, characterized in that: The closing crank arm (301) is connected to the buffer rod (3021) via a pin shaft; a closing roller (303) is installed on the closing crank arm (301), and the closing roller (303) and the buffer rod (3021) roll and press against each other so that when the crank arm swings, pressure is applied to the buffer rod (3021) via the closing roller (303).

6. The control mechanism testing device according to any one of claims 1 to 4, characterized in that: The switch-off load simulation device comprises a hydraulic buffer (402) for providing a simulated load for the switch-off crank arm (401).

7. The control mechanism testing device according to any one of claims 1 to 4, characterized in that: The transmission shaft (2) is connected to a brake opening auxiliary compression spring assembly.

8. The control mechanism testing device according to any one of claims 1 to 4, characterized in that: The closing lever arms (301) are provided in three numbers and arranged side by side.

9. The control mechanism testing device according to claim 1, characterized in that: The frame is provided with a fixing plate on one side where the load power shaft (1) is installed, and a fixing device for fixing the operating mechanism is arranged on the outer side of the fixing plate.

10. The control mechanism testing device according to claim 1, characterized in that: The transmission shaft (2) is a prism shaft, and the opening lever arm (401) and the closing lever arm (301) are mounted on the transmission shaft (2) through holes adapted to the shape of the transmission shaft (2).

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