CN104882338B - Mechanical linkage circuit breaker - Google Patents

Abstract

The invention relates to a mechanical linkage circuit breaker, which comprises a beam and a pull rod, wherein the pull rod is arranged in the beam. The mechanical linkage circuit breaker also includes a guiding device. The guide device includes two bearing parts and two guide sleeves, wherein the bearing parts are fixed on the beam and located on both sides of the pull rod. The guide sleeves are respectively rotatably sleeved on the bearing parts and spaced apart from the pull rods. This mechanical linkage circuit breaker has high reliability and stability.

Description

mechanical linkage circuit breaker

technical field

The invention relates to a mechanical linkage circuit breaker, in particular to a three-phase mechanical linkage high-voltage circuit breaker with a guide device.

Background technique

The circuit breaker is an important switching device in the power system, which is responsible for the dual tasks of control and protection. Its performance is one of the important factors that determine whether the power system can operate safely. With the improvement of people's requirements for power supply quality, the requirements for the reliability and stability of circuit breakers are also getting higher and higher. Especially for mechanical linkage circuit breakers, its operating mechanism is an important part of mechanical linkage circuit breakers, and is one of the key components that determine the opening and closing performance of mechanical linkage circuit breakers. Its performance is directly related to the performance of mechanical linkage circuit breakers. .

In the current mechanical linkage circuit breaker, the pull rod is often too long due to the large interphase spacing. Driven by the operating mechanism, the tie rod is easily deformed and unstable, thereby affecting the mechanical characteristics of the mechanical linkage circuit breaker. In order to ensure the reliability and stability of the mechanical linkage circuit breaker, how to increase the reliability and stability of its transmission without changing the shape and material of the tie rod to meet the requirements of related mechanical characteristics is an urgent problem to be solved.

Contents of the invention

The purpose of the present invention is to provide a mechanical linkage circuit breaker with high reliability and stability. This mechanical linkage circuit breaker includes a beam and a pull rod, wherein the pull rod is arranged in the beam. The mechanical linkage circuit breaker also includes a guiding device. The guide device includes two bearing parts and two guide sleeves, wherein the bearing parts are fixed on the beam and located on both sides of the pull rod. The guide sleeves are rotatably sleeved on the bearing parts respectively and spaced apart from the pull rods.

According to one aspect of the present invention, the two bearing parts are bolts, and the guide sleeve is in the shape of a circular tube.

According to another aspect of the present invention, the guide device further includes two first washers, and the first washers are arranged between the bearing member and the beam.

According to still another aspect of the present invention, the guide device further includes two nuts, and the bearing member is respectively screwed with the corresponding nuts after passing through the corresponding guide sleeves.

According to still another aspect of the present invention, the guide device further includes two bushes, and the bushes are arranged between the bearing member and the guide sleeve.

According to still another aspect of the present invention, the guide device further includes two second washers, and the second washers are arranged between the nut and the bushing.

According to still another aspect of the present invention, the guide device further includes a frame, the frame has a channel inside, and the guide sleeve is arranged in the channel. Two through holes are formed on one side of the frame, and two screw holes are formed on the opposite side. The bearing member sequentially passes through the beam, the corresponding through hole, and the corresponding guide sleeve, and then is screwed into the corresponding screw hole.

According to yet another aspect of the present invention, the frame is made of metal.

According to yet another aspect of the present invention, the two guide sleeves are made of Teflon.

In the mechanical linkage circuit breaker of the present invention, two bearing parts are installed on the crossbeam and located on both sides of the pull rod, and at the same time, two guide sleeves are respectively rotatably sleeved on the two bearing parts and aligned with the two bearing parts. The tie rods are arranged at intervals, which can reduce the friction generated by the relative movement between the guide sleeve and the pull rod while preventing the pull rod from being deformed and unstable, thereby reducing the material wear of the guide sleeve. It not only ensures that the distance between the guide sleeve and the pull rod is within a certain range to ensure the reliability and stability of the mechanical linkage circuit breaker, but also reduces the cost. In addition, the guide device is easy to install and avoids situations such as jamming that may occur during operation.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the preferred implementation modes are specifically cited below, and the detailed description is as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the schematic diagram of mechanical linkage circuit breaker of the present invention;

Fig. 2 is a schematic diagram of an embodiment of the guide device used in the mechanical linkage circuit breaker shown in Fig. 1 according to the present invention;

Fig. 3 is a schematic diagram of another embodiment of the guiding device used in the mechanical linkage circuit breaker shown in Fig. 1 according to the present invention.

Among them, reference signs include:

100 mechanical linkage circuit breaker 110 beam 120 first phase

130 second phase 140 third phase 150 pull rod

160, 160a, 160b guide device 163a, 163b carrier 164a, 164b guide sleeve

1630 First washer 165 Bushing 171 Second washer

175 frames 1751 perforations 1753 channels

1756 Screw hole 170 Nut 1651 Bushing limit piece

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

FIG. 1 is a schematic diagram of a mechanical linkage circuit breaker 100 of the present invention. As shown in FIG. 1 , the mechanical linkage circuit breaker 100 includes a beam 110 , a first phase 120 , a second phase 130 , a third phase 140 , a tie rod 150 and a guide 160 . The first phase 120 , the second phase 130 and the third phase 140 are disposed on the beam 110 . The tie rods 150 are arranged in the beam 110 and connect the adjacent first phase 120 to the second phase 130 and the second phase 130 to the third phase 140 . A guide 160 is also provided in the transverse beam 110 for guiding the tie rod 150 . In various embodiments of the present invention, the number and position of the guide devices 160 can be changed according to actual usage conditions, for example, one guide device 160 is arranged between the first phase 120 and the second phase 130, while the other guide device 160 is arranged between the first phase 120 and the second phase 130 The device 160 is arranged between the second phase 130 and the third phase 140 , or more guide devices 160 are used. The guide device 160 includes two bearing parts and two guide sleeves. For example, in one embodiment shown in Figure 2, the guide device 160a includes two bearing parts 163a and two guide sleeves 164a, or in another embodiment shown in Figure 3, the guide device 160b includes two a carrier 163b and two guide sleeves 164b. Wherein, the guide sleeves 164 a and 164 b can rotate relative to the bearing members 163 a and 163 b to reduce the friction generated by the relative movement between the guide sleeves 164 a and 164 b and the pull rod 150 . The two guide sleeves 164a, 164b are preferably made of materials such as Teflon. In any embodiment, the carrier is fixed on the beam 110 and located on both sides of the pull rod 150 , and the guide sleeves are rotatably sleeved on the carrier and spaced apart from the pull rod. In the present invention, the spaced setting means that there is a small gap between the guide sleeve and the pull rod, so that the two do not contact when the pull rod does not deform or the deformation is small, and when the deformation of the pull rod exceeds a reasonable range, it passes through the guide sleeve. contact and support. The mechanical linkage circuit breaker with the guide device of the present invention can prevent the deformation and instability of the pull rod and at the same time reduce the friction generated by the relative movement between the guide sleeve and the pull rod, thereby reducing the material wear of the guide sleeve. It not only ensures that the distance between the guide sleeve and the pull rod is within a certain range to ensure the reliability and stability of the mechanical linkage circuit breaker, but also reduces the cost. In addition, the guide device is easy to install and avoids situations such as jamming that may occur during operation.

In one embodiment shown in FIG. 2 and another embodiment shown in FIG. 3 , the two bearing parts 163 a and 163 b are bolts, and the guide sleeves 164 a and 164 b are in the shape of circular tubes. Those skilled in the art will understand that the two bearing parts 163a and 163b can also be other parts capable of fixing the guide sleeves 164a and 164b, as long as they allow the relative rotation of the guide sleeves 164a and 164b, but the bolt installation is simple and low in cost. In the embodiment shown in FIG. 2 , the guide device 160a further includes two nuts 170 , and the bearing member 163a is screwed with the corresponding nuts 170 after passing through the corresponding guide sleeve 164a . In the embodiment shown in FIG. 2 , in order to securely install the bearing member 163 a on the beam 110 , a bushing 165 may be provided between the bearing member 163 a and the guide sleeve 164 a. The bushing 165 is sleeved on the bearing member 163a and disposed between the bearing member 163a and the guide sleeve 164a. In this way, the nut 170 can be used to securely install the carrier 163 a on the beam 110 . In addition, in order to reduce vibration, a first washer 1630 may be disposed between the bearing member 163 a and the beam 110 , and a second washer 171 may be disposed between the nut 170 and the bushing 165 . A bush stopper 1651 can also be arranged between the bush 165 and the second washer 171 , or the bush stopper 1651 can be directly arranged between the bush 165 and the nut 170 without the second washer 171 . In the case that the guide sleeve 164a and the bushing 165 are not interference fit, the bushing stopper 1651 can limit the guide bushing 164a, or when there is no bushing stopper 1651, a diameter larger than the bushing 165 can be used. The second washer limits the position of the guide sleeve 164a. The bushing stopper 1651 can also be integrally formed with the bushing 165 . Bushing stop 1651 and bushing 165 are preferably made of metal. In the embodiment shown in FIG. 3 , the guide device 160b further includes a frame 175 , and the frame 175 has a channel 1753 inside, and the guide sleeve 164b is disposed in the channel 1753 . Two through holes 1751 are formed on one side of the frame 175, and two screw holes 1756 are formed on the opposite side. The bearing member 163b passes through the beam 110 , the corresponding through hole 1751 , and the corresponding guide sleeve 164b sequentially, and then is screwed into the corresponding screw hole 1756 . The frame 175 is preferably made of metal such as aluminum. By setting the frame 175, the supporting capacity of the guide device 160 in the direction approximately perpendicular to the length direction of the tie rod 150 can be enhanced, the tie rod 150 is not easily deformed, and the mechanical linkage circuit breaker 100 can be ensured to have high reliability and stability.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (9)

1. A mechanical linkage circuit breaker (100), comprising a beam (110) and a pull rod (150), wherein the pull rod (150) is arranged in the beam (110), characterized in that the mechanical linkage The circuit breaker (100) also includes a guide (160, 160a, 160b); The guide device (160, 160a, 160b) includes two bearing parts (163a, 163b) and two guide sleeves (164a, 164b), wherein the bearing parts (163a, 163b) are fixed to the beam (110) And located on both sides of the pull rod (150), the guide sleeves (164a, 164b) are rotatably sleeved on the bearing parts (163a, 163b) and spaced apart from the pull rod (150). 2. The mechanical linkage circuit breaker (100) according to claim 1, characterized in that, the bearing members (163a, 163b) are bolts, and the guide sleeves (164a, 164b) are in the shape of a circular tube. 3. The mechanical linkage circuit breaker (100) according to claim 2, characterized in that, the guide device (160, 160a, 160b) further comprises two first washers (1630), and the first washers (1630 ) is arranged between the bearings (163a, 163b) and the beam (110). 4. The mechanical linkage circuit breaker (100) according to claim 3, characterized in that, the guide device (160a) further comprises two nuts (170), and the bearing member (163a) passes through the corresponding The guide sleeves (164a) are screwed with the corresponding nuts (170) respectively. 5. The mechanical linkage circuit breaker (100) according to claim 4, characterized in that, the guide device (160a) further comprises two bushes (165), and the bushes (165) are arranged on the bearing between the piece (163a) and the guide sleeve (164a). 6. The mechanical linkage circuit breaker (100) according to claim 5, characterized in that, the guide device (160a) further comprises two second washers (171), and the second washers (171) are arranged on the between the nut (170) and the bushing (165). 7. The mechanical linkage circuit breaker (100) according to claim 3, characterized in that, the guide device (160b) further comprises a frame (175), and the frame (175) has a channel (1753) inside, The guide sleeve (164b) is arranged in the channel (1753); two perforations (1751) are formed on one side of the frame (175), and two screw holes (1756) are formed on the opposite side ; The bearing member (163b) passes through the beam (110), the corresponding through hole (1751), the corresponding guide sleeve (164b) and then screwed into the corresponding screw hole (1756) . 8. The mechanical linkage circuit breaker (100) according to claim 7, characterized in that the frame (175) is made of metal. 9. The mechanical linkage circuit breaker (100) according to any one of claims 1 to 8, characterized in that, the two guide sleeves (164a, 164b) are made of Teflon.