CN115248090B - Measuring device for a circuit breaker - Google Patents
Measuring device for a circuit breaker Download PDFInfo
- Publication number
- CN115248090B CN115248090B CN202210858845.9A CN202210858845A CN115248090B CN 115248090 B CN115248090 B CN 115248090B CN 202210858845 A CN202210858845 A CN 202210858845A CN 115248090 B CN115248090 B CN 115248090B
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- Prior art keywords
- support
- circuit breaker
- tension sensor
- moving contact
- measuring device
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- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 210000000080 chela (arthropods) Anatomy 0.000 description 8
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0057—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to spring-shaped elements
Abstract
The invention provides a measuring device for a circuit breaker, the circuit breaker having a moving contact, a stationary contact and a spring for applying pressure to the moving contact to bring the moving contact into abutment with the stationary contact, the moving contact having a tie rod end, the measuring device comprising: a frame having a first support portion for supporting the circuit breaker; the clamping mechanism is used for clamping the tie rod end; one end of the tension sensor is connected with the clamping mechanism; a lifting mechanism, one end of which is connected to the other end of the tension sensor, the lifting mechanism being capable of moving in a first direction and in a direction opposite to the first direction; under the condition that the lifting mechanism moves in the first direction, the moving contact can be driven to move in the first direction through the tension sensor and the clamping mechanism, and the contact pressure of the moving contact is measured through the tension sensor.
Description
Technical Field
The invention relates to the field of switch cabinets, in particular to a measuring device for a circuit breaker.
Background
Vacuum circuit breakers are one of the important components in medium voltage switchgear. The vacuum circuit breaker has a moving contact, a stationary contact and a spring operating mechanism for applying pressure to the moving contact so that the moving contact and the stationary contact are held closely against each other at the time of closing. In the case of opening the switch, the moving contact needs to release the pressure applied by the spring operating mechanism, and the pressure provided by the spring during closing is called the contact pressure (contact pressure). The contact pressure needs to meet certain standards to ensure the normal operation of the closing position of the vacuum circuit breaker.
Therefore, the contact pressure of the vacuum interrupter needs to be measured before shipment to ensure that it is within a standard range.
Disclosure of Invention
In view of this, the present invention proposes a measuring device for a circuit breaker having a moving contact, a fixed contact and a spring for applying pressure to the moving contact to bring the moving contact into abutment against the fixed contact, the moving contact having a tie rod end, the measuring device comprising:
a frame having a first support portion for supporting the circuit breaker;
a clamping mechanism for clamping the tie rod end;
one end of the tension sensor is connected with the clamping mechanism;
a lifting mechanism, one end of which is connected to the other end of the tension sensor, the lifting mechanism being movable in a first direction and in a direction opposite to the first direction;
under the condition that the lifting mechanism moves to the first direction, the moving contact can be driven to move to the first direction through the tension sensor and the clamping mechanism, and the contact pressure of the moving contact is measured through the tension sensor.
According to the measuring device for the circuit breaker, under the condition that the contact pressure of the moving contact is required to be measured, the clamping mechanism can clamp the pull rod end of the moving contact through the lifting mechanism and drive the moving contact to move towards the opening direction, so that the contact pressure of the moving contact is measured in real time through the tension sensor, and the measuring device is simple, quick and high in accuracy.
According to the measuring device as described above, optionally, the clamping mechanism comprises a telescopic boom and a pincer, the pincer being hinged to the telescopic boom, one end of the telescopic boom being connected to the tension sensor and the other end being connected to the pincer, the telescopic boom being capable of telescoping in the first direction and in a direction opposite to the first direction. Such an implementation is low cost and easy to operate.
According to the measuring device as described above, optionally, the frame has a second supporting portion, the second supporting portion is hollow, the tension sensor is located in the second supporting portion, and the telescopic boom can abut against the top of the second supporting portion when the clamping mechanism is not stressed. This can avoid damage to the tension sensor.
According to the measuring device as described above, optionally, the first supporting portion includes:
a structural frame;
the hollow-out part is positioned in the middle of the structure frame, and the clamping mechanism can clamp the tie rod end of the moving contact through the hollow-out part.
Such a structure can reduce the cost and facilitate the placement of the vacuum circuit breaker.
According to the measuring device as described above, optionally, the first supporting portion further includes:
two support plates, which are fixed to both sides of the structural frame, which can be fixed to a first position to carry the vacuum circuit breaker.
According to the measuring device as described above, optionally each of the first support parts further comprises a fixing pin for locking the support plate in a first position, the support plate being capable of being flipped to a second position without the fixing pin locking the support plate. The supporting plate is fixed through the fixing pin, the structure is simple, and the cost is low.
According to the measuring device as described above, optionally, the support plate is located at a different height than the structural frame in the case of the first position. This allows for multiple types of circuit breakers to be matched to better accommodate different lengths of tie rod ends.
According to the measuring device as described above, optionally, further comprising:
and a handle corresponding to one of the support plates, the handle being fixed to an upper surface of the support plate. By means of the handle, the support plate can be easily turned over.
According to the measuring device as described above, optionally, further comprising:
and the display screen is fixed on the frame and is electrically connected with the tension sensor. The pressure sensor is used for directly reading the current pressure through the display screen, and is convenient and quick.
According to the measuring device as described above, optionally, the frame has a slide rail, and the lifting mechanism is slidable on the slide rail on a plane perpendicular to the first direction. The lifting mechanism can then be moved on this plane to measure the contact pressure of the moving contacts of the other phases of the circuit breaker.
According to the measuring device as described above, optionally, further comprising:
the side plate structure is fixed to the top of the frame and is used for being matched with the vacuum circuit breaker, and the side plate structure is identical to the structure of the side plate of the switch cabinet to which the vacuum circuit breaker is mounted. Therefore, the actual working environment of the vacuum circuit breaker can be simulated more accurately, and the measuring result of the contact pressure is more accurate.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:
fig. 1 is a front view of a measuring apparatus for a circuit breaker of the present invention.
Fig. 2 is a side view of the measuring device for a circuit breaker of the present invention.
Fig. 3 is a partial structural view of the measuring apparatus for a circuit breaker according to the present invention.
Fig. 4 is a schematic view of another partial structure of the measuring device for a circuit breaker according to the present invention.
Wherein, the reference numerals are as follows:
1-frame
10-sliding wheel
11-first support part
111-structure frame
112-hollowed-out part
113-support plate
114-fixing pin
115-handle
116-crossbearer
12-second support part
121-strip-shaped hole
13-slide rail
131-fixing hole
2-clamping mechanism
21-telescopic barrier
22-pincer
3-tension sensor
4-lifting mechanism
41-rotating disk
42-lifter
5-display screen
6-side plate structure
Detailed Description
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
The invention provides a measuring device for a circuit breaker, such as a vacuum circuit breaker. Each phase of the vacuum circuit breaker (not shown in the figure) has a moving contact and a stationary contact, and the vacuum circuit breaker further has a spring which can apply pressure to the stationary contact to ensure that the moving contact and the stationary contact are closely abutted together in the case that the moving contact and the stationary contact are closed. When the movable contact and the fixed contact are separated, the movable contact needs to release the force exerted by the spring and keep away from the fixed contact through the transmission part. Generally, a vacuum circuit breaker has three phases, and correspondingly, three moving contacts. The contact blades of the moving contact and the fixed contact are oppositely arranged, each contact blade is connected with a pull rod, and one end of the pull rod of the moving contact, which is far away from the contact blade, is called a pull rod end of the moving contact.
As shown in fig. 1 to 4, the measuring apparatus for a circuit breaker of the present invention includes a frame 1, a clamping mechanism 2, a tension sensor 3, and a lifting mechanism 4.
The frame 1 has a first support 11, which first support 11 is used for supporting the circuit breaker. The first support 11 may be located at the top of the frame 1, i.e. the circuit breaker may be placed at the top of the frame 1. The frame 1 may be formed by overlapping a plurality of metal ribs. A sliding wheel 10 may be provided at the bottom of the frame 1 to facilitate movement of the measuring device.
The clamping mechanism 2 is used for clamping the pull rod end of the moving contact. The clamping mechanism 2 may have various shapes, such as a pincer or a claw, and the clamping mechanism 2 is configured to move the lever end of the pulling contact in the direction of opening the switch. In the case of placing the circuit breaker in the first supporting portion 11, the opening direction of the moving contact thereof may be the same as the first direction D in fig. 1, and accordingly, the closing direction is the opposite direction to the first direction D. In addition, the clamping mechanism 2 can also complete the clamping operation of the pull rod end of the moving contact by hooking the step part on the moving contact, and can be specifically set according to actual needs, and the details are not repeated here.
The tension sensor 3 is a device for converting a physical signal into a measurable electrical signal to be outputted, thereby completing the process of converting an external force into an electrical signal. One end of the pull force sensor 3 is connected to the holding mechanism 2. The tension sensor 3 may be any of the prior art, for example, an S-type tension sensor.
One end of the lifting mechanism 4 is connected to the other end of the tension sensor 3. When the lifting mechanism 4 moves in the first direction D, the holding mechanism 2 pulls the moving contact away from the fixed contact by pulling the tension sensor 3. At the moment of separation when the position of opening is reached, the contact pressure applied at this time can be determined by the tension sensor 3. How to judge whether the opening position is reached can be judged in various ways, for example, by sound, for example, a low voltage is applied to the moving contact and the fixed contact during measurement, the sound that the current passes through is generated when the moving contact and the fixed contact are in the closing position, the sound that the current passes through when the moving contact and the fixed contact are in the opening position disappears, and other ways (such as lamplight) can be adopted to determine whether the opening position is reached, so that detailed description is omitted. As an exemplary illustration, the lifting mechanism 4 comprises a turntable 41 and a lifter 42, the turntable 41 being rotated such that the lifter 42 is movable in a first direction D or in a direction opposite to the first direction D, the lifter 42 being for example a screw lifter. The turntable 41 is used to move the lifter 42, which is simple and labor-saving.
Optionally, as shown in fig. 1, 2 and 4, the measuring device further comprises a display 5, which display 5 is fixed to the frame 1 and is electrically connected to the tension sensor 3. The display screen 5 is used for displaying the data of the tension sensor 3 in real time, so that the current pressure can be directly read through the display screen 5, and convenience and rapidness are realized.
As an exemplary illustration, in use, a worker may rotate the turntable 41 in a second direction such that the lifter 42 moves in a direction opposite to the first direction D, and the clamping mechanism 2 is pushed to lift by the tension sensor 3, so as to clamp the moving contact, and in particular, the tie rod end of the moving contact may be clamped. Then, the turntable 41 is rotated in the direction opposite to the second direction, the lifter 42 moves in the first direction D, the moving contact is driven to move to the opening position by the clamping mechanism 2, the contact pressure of the moving contact is measured by the tension sensor 3, and specifically, the data on the tension sensor 3 can be read by the display screen 5 at the position reaching the opening position, so that the contact pressure corresponding to the moving contact at the moment can be obtained.
In addition, if the contact pressure of the moving contact does not reach the standard range, the spring and other mechanisms can be adjusted on the measuring device in real time, and the real-time contact pressure is obtained through the tension sensor 3, so that the contact pressure of the moving contact reaches the standard range, and the measuring device is very convenient.
According to the measuring device for the circuit breaker, under the condition that the contact pressure of the moving contact is required to be measured, the clamping mechanism 2 can clamp the pull rod end of the moving contact through the lifting mechanism 4 and drive the moving contact to move in the opening direction, so that the contact pressure of the moving contact is measured in real time through the tension sensor 3, and the measuring device is simple, quick and high in accuracy.
As an exemplary illustration, as shown in fig. 3, the clamping mechanism 2 comprises a telescopic boom 21 and a pincer-like portion 22, the pincer-like portion 22 being hinged to the telescopic boom 21, the telescopic boom 21 being connected at one end to the tension sensor 3 and at the other end to the pincer-like portion 22, the telescopic boom 21 being capable of being stretched in a first direction D and in a direction opposite to the first direction D. Such an implementation is low cost and easy to operate. The telescopic boom 21 is hinged to the pincer 22. Under the condition that the lifting mechanism 4 pushes the telescopic barrier 21 to move in the direction opposite to the first direction D, the pincer-shaped part 22 gradually approaches to the pull rod end of the moving contact, the pull rod end of the moving contact is clamped by the closing of the pincer-shaped part 22, the pull rod end of the moving contact is provided with at least one step, the clamping mechanism 2 is driven to move in the first direction D in the process that the lifting mechanism 4 moves in the first direction D, the pincer-shaped part 22 is clamped on the step of the pull rod end, and then the moving contact is driven to move in the first direction D, so that the moving contact is separated from the fixed contact. After the measurement is completed, the lifting mechanism 4 can move in a direction opposite to the first direction D, so that the pincer 22 can be opened, and the tie rod end of the movable contact can be loosened. The pincer 22 may be opened in a variety of ways, such as by manual opening or by the pincer 22 contacting the tie rod end.
As an exemplary illustration, the frame 1 further comprises a second supporting portion 12, the second supporting portion 12 is hollow, the tension sensor 3 is located in the second supporting portion 12, and the telescopic barrier 21 can abut against the top of the second supporting portion 12 when the clamping mechanism 2 is not stressed. For the telescopic barrier 21, under the condition of no stress, the gravity of the telescopic barrier can enable the telescopic barrier to be piled on the top of the second supporting portion 12, so that gravity cannot be applied to the tension sensor 3, and damage to the tension sensor 3 is avoided. Further, the second support 12 may be rectangular as shown in fig. 1, 2 and 4, which is hollow, in which the tension sensor 3 is located. Further, a bar-shaped hole 121 may be provided on a sidewall of the second support 12, the bar-shaped hole 121 may extend along the first direction D, and the lifter 42 may be located in the second support 12 and move along the bar-shaped hole 121 in the first direction D and in a direction opposite to the first direction D.
As an exemplary illustration, the first supporting portion 11 includes a structural frame 111 and a hollowed-out portion 112. The hollow part 112 is located in the middle of the structure frame 111, and the clamping mechanism 2 can clamp the tie rod end of the moving contact through the hollow part 112. For example, the structure frame 111 is formed by overlapping several frames, so that the vacuum circuit breaker can be carried relatively stably, the middle of the structure frame is provided with the hollowed-out part 112, and the clamping mechanism 2 can extend upwards from the lower part of the first supporting part 11 through the hollowed-out part 112 so as to clamp the pull rod end of the moving contact. Such a structure can reduce the cost and facilitate the placement of the vacuum circuit breaker.
As an exemplary illustration, the first supporting portion 11 further includes two supporting plates 113. Two support plates 113 are respectively fixed to both sides of the structural frame 111, and the support plates 113 can be fixed to a first position for carrying the vacuum circuit breaker. As shown in fig. 1 and 4, the support plate 113 is shown in a first position. Under the condition that the supporting plate 113 and the structural member 111 are located at the first position and are the same in height, the area for bearing the circuit breaker can be increased, the circuit breaker is prevented from being displaced, and the circuit breaker is convenient to place. Optionally, each first support 11 further comprises a fixing pin 114, the fixing pin 114 being adapted to lock the support plate 113 in a first position, the support plate 113 being capable of being flipped to a second position, for example by an acute or right angle, in case the fixing pin 114 does not lock the support plate 113. That is, each support plate 113 can be flipped to a first position when it is desired to carry a circuit breaker; when the type of the circuit breaker needs to be adjusted, the supporting plate 113 can be turned down to be located at the second position so as to meet other requirements on the production line. As a specific example, the height of the support plate 113 in the first position is different from the height of the structural frame 111, so that a plurality of types of circuit breakers can be matched to be better suitable for the tie rod ends with different lengths. If the support plate 113 is located at a first position at a higher level than the structural frame 111, it can carry a circuit breaker when the support plate 13 is located at the first position, and the structural frame 111 can carry a circuit breaker when the support plate 113 is located at the second position. As another specific example, the fixing pin 114 may be fixed on the structural frame 111, and when the fixing pin 114 extends toward the supporting plate 113, it may be matched with a hole on the supporting plate 113, so as to fix the supporting plate 113 in the first position; when the fixing pin 114 moves away from the supporting plate 113, the fixing pin can withdraw from the hole in the supporting plate 113, the supporting plate 113 loses supporting force, and the supporting plate falls down due to self gravity to realize overturning to the second position. The support plate 113 is fixed by the fixing pin 114, and the structure is simple and the cost is low.
Alternatively, a handle 115 may be provided on the support plate 113, the handle 115 being fixed to the upper surface of the support plate 113, and the support plate 113 may be easily turned over by the weight of the handle 115 itself. In addition, the operator can also turn over the support plate 113 through the handle 115, so as to avoid the support plate 113 from turning over too fast.
Alternatively, the frame 1 may have a rail 13 thereon, and the lifting mechanism 4 may be slid by the rail 13 on a plane perpendicular to the first direction D. As shown in fig. 1, the sliding rail 13 extends along a plane perpendicular to the first direction D, so that the lifting mechanism 4 can move on the plane to measure the contact pressure of the moving contacts of the other phases of the circuit breaker. Such a structure is very convenient. The slide rail 13 may be provided with fixing holes 131, and the lifting mechanism 4 may be fixed to a corresponding position by bolts and the fixing holes 131. More specifically, when the lifter 42 is disposed inside the second supporting portion 12, the second supporting portion 12 and the sliding rail 13 cooperate to implement the movement of the lifting mechanism 4, for example, a cross frame 116 is used to implement the cooperation between the second supporting portion 12 and the sliding rail 13, so as to implement the overall movement with the clamping mechanism 2 and the tension sensor 3, as shown in fig. 1.
Optionally, the measuring device further comprises a side plate structure 6, which side plate structure 6 is fixed to the frame 1. As shown in fig. 1, which is fixed to one side of the top of the frame 1. The side plate structure 6 is used for matching a circuit breaker, and the side plate structure 6 is identical to the structure of the side plate of one of the switch cabinets to which the circuit breaker is mounted. The side plate structure 6 is the same as the side plate structure 6 to which the vacuum circuit breaker is mounted, and can more accurately simulate the actual working environment of the vacuum circuit breaker, so that the measuring result of the contact pressure is more accurate.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. A measuring device for a circuit breaker having a moving contact, a stationary contact and a spring for applying pressure to the moving contact to bring the moving contact into abutment against the stationary contact, the moving contact having a tie rod end, the measuring device comprising:
-a frame (1) having a first support (11), said first support (11) being adapted to support said circuit breaker;
-a clamping mechanism (2), said clamping mechanism (2) being adapted to clamp said tie rod end;
a tension sensor (3), wherein one end of the tension sensor (3) is connected with the clamping mechanism (2);
a lifting mechanism (4), one end of the lifting mechanism (4) is connected to the other end of the tension sensor (3), and the lifting mechanism (4) can move in a first direction and a direction opposite to the first direction;
under the condition that the lifting mechanism (4) moves in a first direction, the moving contact can be driven to move in the first direction through the tension sensor (3) and the clamping mechanism (2), and the contact pressure of the moving contact is measured through the tension sensor (3);
the clamping mechanism (2) comprises a telescopic barrier (21) and a clamp-shaped part (22), the clamp-shaped part (22) is hinged with the telescopic barrier (21), one end of the telescopic barrier (21) is connected with the tension sensor (3), the other end of the telescopic barrier is connected with the clamp-shaped part (22), and the telescopic barrier (21) can stretch in the first direction and the direction opposite to the first direction.
2. The measuring device according to claim 1, characterized in that the frame (1) has a second support (12), the second support (12) being hollow, the tension sensor (3) being located in the second support (12), the telescopic boom (21) being able to rest against the top of the second support (12) in the absence of a force from the clamping mechanism (2).
3. The measurement device according to claim 1, wherein the first support (11) comprises:
a structural frame (111);
the clamping mechanism (2) can clamp the tie rod end through the hollowed-out part (112).
4. A measuring device according to claim 3, characterized in that the first support (11) further comprises:
-two support plates (113), said support plates (113) being fixed to both sides of the structural frame (111), said support plates (113) being capable of being fixed in a first position to carry the circuit breaker.
5. The measuring device according to claim 4, characterized in that each of the first support parts (11) further comprises a securing pin (114), the securing pin (114) being adapted to lock the support plate (113) in a first position, the support plate (113) being capable of being flipped to a second position in case the securing pin (114) does not lock the support plate (113).
6. The measuring device according to claim 4, characterized in that the support plate (113) is located at a different height than the structure frame (111) in the first position.
7. The measurement device of claim 4, further comprising:
and a handle (115) corresponding to one of the support plates (113), the handle (115) being fixed to the upper surface of the support plate (113).
8. The measurement device of any one of claims 1-7, further comprising:
and the display screen (5) is fixed on the frame (1) and is electrically connected with the tension sensor (3).
9. The measuring device according to any one of claims 1-7, characterized in that the frame (1) has a slide rail (13), the lifting mechanism (4) being slidable on the slide rail (13) in a plane perpendicular to the first direction.
10. The measurement device of any one of claims 1-7, further comprising:
a curb plate structure (6), curb plate structure (6) are fixed in the top of frame (1), curb plate structure (6) are used for matching the circuit breaker, just curb plate structure (6) are the same with the structure of the curb plate of a cubical switchboard that this circuit breaker was installed to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858845.9A CN115248090B (en) | 2022-07-21 | 2022-07-21 | Measuring device for a circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858845.9A CN115248090B (en) | 2022-07-21 | 2022-07-21 | Measuring device for a circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115248090A CN115248090A (en) | 2022-10-28 |
| CN115248090B true CN115248090B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210858845.9A Active CN115248090B (en) | 2022-07-21 | 2022-07-21 | Measuring device for a circuit breaker |
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| CN (1) | CN115248090B (en) |
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| CN115248090A (en) | 2022-10-28 |
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