Propulsion interlocking device for circuit breaker handcart

Abstract

The utility model discloses a propulsion interlocking device for a circuit breaker handcart, which comprises a propulsion screw rod arranged at the bottom of a circuit breaker in a penetrating manner, a cross beam is vertically connected to the propulsion screw rod at the outer side of the circuit breaker, and bolts are arranged at the two ends of the cross beam. And the cross beam is also provided with an adjusting component for adjusting the connection distance between the moving contact and the static contact of the circuit breaker. The propulsion interlocking device is driven by the screw rod, so that the moving contact and the static contact of the circuit breaker are gradually close to each other and are in contact with each other, the distance between the moving contact and the static contact is adjusted, and the defect that the contact state of the moving contact and the static contact cannot be adjusted when the circuit breaker is positioned after a bolt is inserted at present is overcome. The propelling stroke of the propelling screw rod can be precisely limited through the adjusting component, so that the propelling screw rod can drive the moving contact of the circuit breaker to be precisely meshed with the static contact, and the problem that the moving contact and the static contact are mutually damaged due to excessive extrusion caused by blind rotation of the propelling screw rod is further avoided.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a propulsion interlocking device for a circuit breaker trolley. Background Art

[0002] A trolley-type circuit breaker is an electrical device with a manual operating mechanism, primarily used to protect power systems from short circuits and line overloads. It uses a manual or electric operating mechanism to open and close circuits, thereby disconnecting them when necessary to protect electrical equipment and personnel. Trolley-type circuit breakers typically consist of a housing, a contact system (moving and stationary contacts), and a spring mechanism. They are widely used in various power systems, particularly in applications requiring frequent operation or high reliability. They are typically used to control high-current switching equipment such as generators, transformers, busbars, and other high-voltage power equipment.

[0003] At present, the trolley type circuit breaker adopts a left and right single pin type propulsion mechanism for the trolley propulsion, as shown in the attached manual. Figure 1-2 As shown, the pin diameter is φ20mm. In actual use, this single-pin push mechanism cannot reliably position the circuit breaker once the pin is inserted into the positioning mechanism's hole. Furthermore, once the pin is positioned, the circuit breaker's moving and stationary contacts must engage. However, due to errors in machining and assembly, these contacts cannot precisely engage, leading to issues such as unreliable contact and excessive contact pressure, which can cause mutual damage. Furthermore, the push mechanism is weak and easily deformed, making it difficult to manufacture. Summary of the Invention

[0004] In response to the above-mentioned problems, the present application aims to provide a push interlock device for a circuit breaker trolley, which solves the current problem that the circuit breaker is positioned immediately after the pin is inserted, but the contact state of the moving and static contacts cannot be adjusted. At the same time, the push stroke of the push screw can be accurately limited so that the push screw can drive the moving contact of the circuit breaker to accurately engage with the static contact.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is as follows: a push interlock device for a circuit breaker trolley, characterized in that: the push interlock device includes a push screw passing through the bottom of the circuit breaker, a crossbeam is vertically connected to the push screw located on the outside of the circuit breaker, and pins are provided at both ends of the crossbeam. An adjustment member for adjusting the contact distance between the moving and static contacts of the circuit breaker is also provided on the crossbeam.

[0006] Preferably, there is no less than one latch provided on the beam, and a plurality of latches are staggered.

[0007] Preferably, the adjusting member includes an adjusting rod arranged parallel to the bottom of the advancing screw and connected to the crossbeam, the end of the adjusting rod is provided with a distance block in contact with the side wall of the circuit breaker, and a tripping mechanism for driving the advancing screw to trip is provided between the adjusting rod and the crossbeam.

[0008] Preferably, an adjusting screw is passed through the distance block.

[0009] The beneficial effect of the present application is that the propulsion interlocking device is driven by a screw to achieve the gradual approach and contact between the moving contact and the static contact of the circuit breaker, and at the same time achieve the adjustment of the spacing between the moving and static contacts, thereby solving the current problem that the circuit breaker is positioned immediately after the pin is inserted, but the contact state of the moving and static contacts cannot be adjusted.

[0010] The advancing stroke of the advancing screw can be precisely limited by the adjusting member so that the advancing screw can drive the moving contact of the circuit breaker to engage with the static contact precisely, thereby avoiding the problem of excessive squeezing of the moving and static contacts resulting in mutual damage caused by blindly rotating the advancing screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the front view structural diagram of the current circuit breaker.

[0012] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0013] Figure 3 This is a side view of the circuit breaker.

[0014] Figure 4 This is a diagram showing the contact between the moving contact and the static contact of the circuit breaker.

[0015] Figure 5 for Figure 4 Enlarged view of the structure at point B (illustration showing gap and excessive contact between the moving and static contacts).

[0016] Figure 6 Multiple offset pin diagrams are provided for this application.

[0017] Figure 7 For this application, an adjustment component is provided on the circuit breaker as shown.

[0018] Figure 8 This is an enlarged structural diagram of the adjustment component for this application.

[0019] Figure 9 For this application Figure 8 Enlarged view of the structure at point C in the middle.

[0020] Figure 10 This is a diagram showing the contact between the positioning block and the side wall of the circuit breaker for this application.

[0021] Figure 11 This is a diagram of the tripping mechanism for this application.

[0022] Figure 12 For this application Figure 11 Enlarged diagram of the structure at point D in the middle.

[0023] In the figure: 71 - moving contact; 72 - static contact; 8 - sliding sleeve; 8a - U-shaped groove; 9 - driving shaft; 91 - connecting column; 10 - handle. DETAILED DESCRIPTION

[0024] In order to enable ordinary technicians in this field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Refer to the attached Figures 1 to 12 The illustrated diagram shows a push-through interlock device for a circuit breaker trolley. The push-through interlock device includes a push screw 1 extending through the bottom of the circuit breaker. A crossbeam 2 is vertically connected to the push screw 1, located on the outside of the circuit breaker. Pins 3 are provided at both ends of the crossbeam 2. The spaced pins 3 engage with the fixed base provided with the circuit breaker to position and secure the crossbeam 2. The push screw 1 is then rotated to drive the circuit breaker forward (a roller is provided at the bottom of the circuit breaker, indicated in the figure). This screw drive allows the moving and static contacts of the circuit breaker to gradually approach and contact each other, while also adjusting the spacing between the moving and static contacts. This addresses the current drawback of positioning the circuit breaker immediately after the pin is inserted, but not adjusting the contact state of the moving and static contacts.

[0026] Because the advancing screw 1 cannot accurately determine the contact state between the moving and static contacts when driving the circuit breaker, the advancing screw 1 may over-rotate, causing the moving and static contacts to come into contact and damage each other. To address this problem, an adjustment member for adjusting the distance between the moving and static contacts of the circuit breaker is provided on the crossbeam 2. This adjustment member can accurately limit the advancement stroke of the advancing screw 1 so that the advancing screw 1 can drive the moving contact of the circuit breaker to accurately engage with the static contact, thereby avoiding the problem of blindly rotating the advancing screw 1, which causes excessive compression and mutual damage between the moving and static contacts.

[0027] In order to solve the problem that the current single pin cannot achieve reliable positioning of the circuit breaker, Figure 6 As shown, there is at least one latch 3 provided on the crossbeam 2, and preferably two in this application. Compared with a single latch, two latches can achieve two positions, thereby improving the torsion effect and positioning stability of the circuit breaker. In this application, due to the provision of the crossbeam 2, the crossbeam 2 is firmly positioned by the latch, and the circuit breaker can be pushed stably by the advancing screw 1.

[0028] Further preferably, the plurality of latches 3 are staggered, that is, staggered front to back, which can further enhance the positioning effect of the latches and the anti-torsion effect on the beam 2 .

[0029] Specifically, such as Figure 7-12 As shown, the adjusting member includes an adjusting rod 4 arranged parallel to the bottom of the advancing screw 1 and connected to the crossbeam 2. The end of the adjusting rod 4 is provided with a distance block 5 in contact with the side wall of the circuit breaker. A tripping mechanism for driving the advancing screw 1 to trip is provided between the adjusting rod 4 and the crossbeam 2. The tripping structure is as shown in FIG. Figure 12 As shown, a sliding sleeve 8 is provided at the tail end of the push screw 1 in a sliding keyway structure, and a drive shaft 9 is passed through the other end of the sleeve. A connecting column 91 is provided on the drive shaft and can be embedded in the U-shaped groove 8a provided on the sleeve, and the tail end of the adjustment rod 4 is connected to the annular sleeve of the sleeve. The operation process is as follows: by connecting the handle 10 to the outer end of the drive shaft, when the handle is turned, the connecting column is embedded in the U-shaped groove of the sleeve, and the sleeve is driven to rotate by the drive shaft, and the sleeve drives the push screw 1 to rotate, thereby driving the circuit breaker forward. When the moving contact and the static contact of the circuit breaker approach and contact, the distance block 5 on the adjustment rod 4 contacts the side wall of the circuit breaker (the circuit breaker moves forward and gradually contacts the distance block 5), as shown in FIG. Figure 10 As shown, the circuit breaker drives the adjusting rod 4 forward and drives the sliding sleeve to slide at the same time, so that the connecting column is disengaged from the U-shaped groove. The rotation of the drive shaft cannot drive the sliding sleeve to rotate, and thus cannot drive the propulsion screw 1 to rotate, thereby realizing the tripping operation. That is, rotating the drive shaft again cannot drive the circuit breaker to move forward, ensuring that the moving contact and the static contact are in precise contact, solving the problem of excessive squeezing of the moving contact and the static contact during blind operation and causing damage to each other.

[0030] Different circuit breakers have different assembly positions for the moving and static contacts. Therefore, in order to facilitate adjustment, Figure 9 As shown, an adjusting screw 6 is passed through the distance block 5 .

[0031] The principle of the present application is: when the moving and static contacts of the circuit breaker are connected, the pin is first driven to be inserted into the fixed base matched with the circuit breaker to fix the crossbeam 2, and then a handle is sleeved on the driving shaft. During the rotation of the handle, the connecting column is embedded in the U-shaped groove of the sliding sleeve, and the sliding sleeve is driven to rotate by the driving shaft, and the sliding sleeve drives the propulsion screw 1 to rotate, thereby driving the circuit breaker forward. When the moving contact and the static contact of the circuit breaker are close to and in contact, the distance block 5 on the adjusting rod 4 contacts the side wall of the circuit breaker, and the circuit breaker drives the adjusting rod 4 forward and drives the sliding sleeve to slide at the same time, so that the connecting column is disengaged from the U-shaped groove, thereby achieving precise contact between the moving contact and the static contact, and solving the problem of excessive squeezing of the moving contact and the static contact during blind operation, causing mutual damage.

[0032] The above shows and describes the basic principles, main features and advantages of this application. Without departing from the spirit and scope of this application, this application will also have various changes and improvements, which fall within the scope of this application.

Claims

1. A push interlock device for a circuit breaker trolley, characterized by: The propulsion interlocking device comprises a propulsion screw (1) passing through the bottom of the circuit breaker, a crossbeam (2) vertically connected to the propulsion screw (1) located outside the circuit breaker, latches (3) are provided at both ends of the crossbeam (2), and an adjusting member for adjusting the contact distance between the moving and static contacts of the circuit breaker is also provided on the crossbeam (2).

2. The propulsion interlock device according to claim 1, characterized in that: There is no less than one latch pin (3) arranged on the crossbeam (2), and a plurality of latch pins (3) are arranged in a staggered manner.

3. The propulsion interlock device according to claim 2, characterized in that: The adjusting member comprises an adjusting rod (4) arranged parallel to the bottom of the advancing screw (1) and connected to the crossbeam (2); a distance block (5) in contact with the side wall of the circuit breaker is provided at the end of the adjusting rod (4); and a tripping mechanism for driving the advancing screw (1) to trip is provided between the adjusting rod (4) and the crossbeam (2).

4. The propulsion interlock device according to claim 3, characterized in that: An adjusting screw (6) is passed through the distance block (5).

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