Opening buffer device of pole-mounted circuit breaker

Abstract

The utility model relates to the technical field of pole-mounted circuit breakers, in particular to an opening buffer device of a pole-mounted circuit breaker, which comprises a mounting box, a quick disconnecting mechanism is arranged in the mounting box, three shells are arranged at the top of the mounting box, static contacts are fixedly connected to the tops of the shells in a penetrating manner, opening buffer assemblies are slidably connected in the shells, and each opening buffer assembly comprises a connecting rod. A first vertical rod is arranged at the top of the piston plate; a push plate is connected to the top of the first vertical rod; a second vertical rod is arranged at the top of the push plate; a moving contact is arranged at the top of the second vertical rod; a limiting assembly used for limiting the up-down moving range of the vertical plate is arranged on the outer wall of the shell. According to the opening buffer device of the pole-mounted circuit breaker, the limiting assembly is matched with the limiting sliding groove, the rectangular limiting block is embedded into the limiting sliding groove in the opening process, the moving range of the vertical plate is limited, and it is ensured that the moving contact and the static contact are completely separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pole circuit breaker, concretely is the opening buffer device of pole circuit breaker. BACKGROUND

[0002] Pole circuit breaker is an important power equipment, mainly used for switching control and protection to line in power system. It can quickly cut off the current when fault occurs, thereby preventing equipment damage and power accident. Pole circuit breaker is widely used in distribution network, especially in urban power grid, rural power grid and wind power, photovoltaic power generation and other fields, has high safety, easy operation and other advantages. In its working process, the opening device plays a key role, which is responsible for quickly disconnecting the circuit when necessary.

[0003] The patent with publication number CN221508037U discloses a pole circuit breaker with opening buffer mechanism, comprising a mounting box, a connecting foot, a shell, a limiting mechanism and a quick disconnecting mechanism, the connecting foot is fixedly connected to the left and right side bottoms of the mounting box, the shell is uniformly fixedly connected to the top of the mounting box, the limiting mechanism is fixedly connected to the middle of the left side wall of the shell, the pole circuit breaker with opening buffer mechanism, when disconnected, makes the moving contact drop, when the moving contact drops, makes the sliding groove drop, makes the insertion rod slide inside the sliding groove, when the insertion rod end aligns with the fixed groove, through the reset of the connecting spring, drives the mounting plate to move right, thereby driving the insertion rod to move right, makes the insertion rod end inlay in the fixed groove, fixes the moving contact, thereby avoiding the moving contact from closing with the static contact again due to the reaction force of the buffer spring, improves the safety of the device.

[0004] However, the prior art fixes the moving contact by inlaying the insertion rod end in the fixed groove during opening, although it realizes stable positioning of the moving contact, but this structure will cause the moving contact to be quickly stuck by the insertion rod after moving down, losing the original buffering effect, therefore, we propose an opening buffer device of pole circuit breaker, aiming to optimize the mechanical behavior in the opening process, enhance the buffering effect of the equipment, avoid damage caused by impact, thereby improving the overall performance and service life of the pole circuit breaker. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing the opening buffer device of pole circuit breaker, to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] The opening buffer device of the pole-mounted circuit breaker comprises a mounting box, the left and right sides of the bottom of the mounting box are provided with connecting feet for fixed mounting of the mounting box, a quick disconnecting mechanism is arranged in the mounting box, the specific working principle of the quick disconnecting mechanism is the prior art, for example, the detailed working principle of the quick disconnecting mechanism in the pole-mounted circuit breaker with an opening buffer mechanism disclosed in the patent with the publication number CN221508037U, which will not be described herein again, when the quick disconnecting mechanism performs opening operation, the quick disconnecting mechanism drives three opening buffer assemblies to move downward quickly, the moving contact moves downward quickly along with the opening buffer assemblies, the opening buffer assemblies play a buffering role on the moving contact, and ensure that the moving contact and the static contact are effectively separated, and the moving contact will not be in contact again.

[0008] The top of the mounting box is provided with three equidistantly arranged shells, a static contact is fixedly connected to the middle of the top of the shell, and an opening buffer assembly is slidably connected to the shell.

[0009] The top of the mounting box is provided with three equidistantly arranged shells, a static contact is fixedly connected to the middle of the top of the shell, and an opening buffer assembly is slidably connected to the shell.

[0010] The outer wall of the second vertical rod is provided with a vertical plate, a limiting sliding groove is formed in the left side of the vertical plate, a positioning groove is formed in the left side of the inner wall bottom of the limiting sliding groove, and the outer wall of the shell is provided with a limiting assembly for limiting the up-down movement range of the vertical plate.

[0011] Preferably, the bottom end of the first spring abuts against the top of the oil tank, and the top end of the first spring abuts against the bottom of the push plate, and the first spring provides a force for the reset movement of the moving contact.

[0012] Preferably, the limiting assembly comprises a rectangular cover fixedly connected to the outer wall of the shell, and the rectangular cover is in communication with the shell, and a rectangular limiting block is slidably connected in the rectangular cover.

[0013] Preferably, when the static contact and the dynamic contact are in contact, the right end of the rectangular limiting block is located in the positioning groove, when the static contact and the dynamic contact are separated, the right end of the rectangular limiting block is located in the limiting sliding groove, and the rectangular limiting block limits the opening and closing buffer assembly after the opening and closing buffer assembly moves downward.

[0014] Preferably, the right end of the rectangular limiting block is provided with a U-shaped groove, and a roller is rotatably connected in the U-shaped groove, when the right end of the rectangular limiting block is located in the positioning groove, the outer wall of the roller abuts against the right side of the inner wall of the positioning groove, and when the right end of the rectangular limiting block is located in the limiting sliding groove, the outer wall of the roller abuts against the right side of the inner wall of the limiting sliding groove, so as to reduce the friction and facilitate the upward and downward buffer movement of the opening and closing buffer assembly.

[0015] Preferably, a pull rod is arranged at the middle of the left side of the rectangular limiting block, the left end of the pull rod penetrates through the left side of the inner wall of the rectangular cover to the outside, and a pull ring is arranged at the left end of the pull rod, so as to facilitate the staff to pull the pull rod, drive the rectangular limiting block to move leftwards, and make the right end of the rectangular limiting block move out of the limiting sliding groove when the circuit breaker is closed, so that the vertical plate can move upward, and then the dynamic contact and the static contact are in contact.

[0016] Preferably, the left side of the rectangular limiting block and positions close to the front and rear ends are provided with second springs, the left end of the second spring abuts against the left side of the inner wall of the rectangular cover, and under the action of the two second springs, when the opening and closing buffer assembly moves downward, the right end of the rectangular limiting block can quickly move rightwards into the limiting sliding groove, so as to ensure the response efficiency of the limiting assembly.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1、The opening and closing buffer device of the pole-mounted circuit breaker, the opening and closing buffer assembly is matched by the oil tank, the piston plate and the viscous oil, the flow resistance generated when the viscous oil passes through the oil hole in the piston plate is utilized to actively adjust the downward speed of the dynamic contact, the damping effect can greatly slow down the mechanical impact in the opening process, the instantaneous impact force caused by the too fast opening speed is avoided, so as to protect the dynamic contact and prolong the service life of the equipment.

[0019] 2. The opening buffer device of the pole-mounted circuit breaker, the cooperation of the limiting assembly and the limiting sliding groove is designed, the rectangular limiting block is embedded into the limiting sliding groove during opening to limit the moving range of the vertical plate, and the dynamic contact and the static contact are completely separated, compared with the rigid locking mode of the prior art, the device can realize stable limiting and allow the opening buffer assembly to complete flexible buffering through the first spring and viscous oil damping after opening.

[0020] 3. The opening buffer device of the pole-mounted circuit breaker, the roller design at the right end of the rectangular limiting block contacts the limiting sliding groove or the positioning groove when the opening buffer assembly moves up and down, the rolling friction is used to replace the sliding friction, mechanical wear is significantly reduced, the response speed and smoothness of the limiting assembly are improved, and meanwhile, the linkage design of the pull rod and the pull ring allows an operator to manually pull to quickly release the limiting, facilitates closing operation, and improves maintenance efficiency.

[0021] 4. The opening buffer device of the pole-mounted circuit breaker, the first spring provides the elastic force for dynamic contact resetting, and ensures that the dynamic contact and the static contact are effectively contacted during closing; and the second spring pushes the rectangular limiting block to quickly move into the limiting sliding groove, and enhances the response efficiency of the limiting assembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the utility model;

[0023] Figure 2 It is a whole cross section structure schematic view of the utility model;

[0024] Figure 3 It is one of partial structure schematic views of the utility model;

[0025] Figure 4 It is the second of partial structure schematic views of the utility model;

[0026] Figure 5 It is the partial structure schematic view of the opening buffer assembly in the utility model;

[0027] In the drawing: 1, mounting box; 2, connecting foot; 3, shell; 4, static contact; 5, dynamic contact; 6, opening buffer assembly; 60, connecting rod; 61, oil tank; 62, piston plate; 620, oil passing hole; 63, first vertical rod; 64, push plate; 65, second vertical rod; 66, first spring; 67, vertical plate; 670, positioning groove; 671, limiting sliding groove; 7, quick disconnecting mechanism; 8, limiting assembly; 80, rectangular cover body; 81, rectangular limiting block; 82, roller; 83, pull rod; 84, second spring; 85, pull ring. DETAILED DESCRIPTION

[0028] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of the utility model protection.

[0029] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0030] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0031] The opening buffer device of pole-mounted circuit breaker, including installation box 1, installation box 1 bottom's left and right sides are equipped with connecting foot 2, for the fixed installation of installation box 1, installation box 1 is equipped with quick disconnecting mechanism 7, and the specific working principle of quick disconnecting mechanism 7 is prior art, such as the detailed working principle introduction of quick disconnecting mechanism 7 in the pole-mounted circuit breaker with opening buffer mechanism disclosed in the patent with the publication number CN221508037U, which will not be repeated here, when quick disconnecting mechanism 7 opens the operation, quick disconnecting mechanism 7 drives three opening buffer assemblies 6 to move quickly downwards, and moving contact 5 moves quickly downwards along with opening buffer assembly 6, opening buffer assembly 6 plays a buffering role to moving contact 5, and ensures that moving contact 5 and static contact 4 are effectively separated, and the situation of recontacting does not occur.

[0032] The top of installation box 1 is equipped with three equidistantly arranged housings 3, the middle part of the top of housing 3 is fixedly connected with static contact 4, and housing 3 is slidably connected with opening buffer assembly 6, opening buffer assembly 6 includes connecting rod 60 connected with quick disconnecting mechanism 7, the bottom end of connecting rod 60 is rotatably connected with the mounting seat of quick disconnecting mechanism 7, so that connecting rod 60 can be pulled down by quick disconnecting mechanism 7, the top end of connecting rod 60 is equipped with oil tank 61 filled with viscous oil, and piston plate 62 is slidably connected in oil tank 61, a plurality of oil passing holes 620 are formed in the bottom of piston plate 62, when piston plate 62 moves up and down in oil tank 61, viscous oil generates resistance to piston plate 62, and plays a force reduction role.

[0033] The middle part of the top of the piston plate 62 is provided with a first vertical rod 63, the top end of the first vertical rod 63 penetrates the top of the inner wall of the oil tank 61 and is fixedly connected with a push plate 64, the connection between the first vertical rod 63 and the oil tank 61 is provided with a rubber ring to avoid leakage of viscous oil in the oil tank 61, the outer side of the first vertical rod 63 is sleeved with a first spring 66, the middle part of the top of the push plate 64 is provided with a second vertical rod 65, the top end of the second vertical rod 65 is provided with a moving contact 5, and when the switch is closed, the push plate 64 cooperates with the first spring 66 to ensure that the moving contact 5 is in effective contact with the static contact 4.

[0034] The outer wall of the second vertical rod 65 is provided with a vertical plate 67, the left side of the vertical plate 67 is provided with a limiting sliding groove 671, the left side of the inner wall bottom of the limiting sliding groove 671 is provided with a positioning groove 670, and the outer wall of the shell 3 is provided with a limiting assembly 8 for limiting the up-down movement range of the vertical plate 67, when the switch is opened, the right end of the rectangular limiting block 81 of the limiting assembly 8 is located in the limiting sliding groove 671, so as to hinder the vertical plate 67 from moving upward excessively when moving upward and downward, so as to ensure that the moving contact 5 and the static contact 4 are not in contact, and meanwhile the buffering effect of the opening and closing buffering assembly 6 is not affected.

[0035] In this embodiment, the bottom end of the first spring 66 abuts against the top of the oil tank 61, the top end of the first spring 66 abuts against the bottom of the push plate 64, and the first spring 66 provides a force for the reset movement of the moving contact 5.

[0036] Specifically, the limiting assembly 8 comprises a rectangular cover body 80 fixedly connected to the outer wall of the shell 3, and the rectangular cover body 80 communicates with the shell 3, and the rectangular cover body 80 is slidably connected with a rectangular limiting block 81.

[0037] Further, when the static contact 4 and the moving contact 5 are in contact, the right end of the rectangular limiting block 81 is located in the positioning groove 670, when the static contact 4 and the moving contact 5 are separated, the right end of the rectangular limiting block 81 is located in the limiting sliding groove 671, and after the opening and closing buffering assembly 6 moves downward, the rectangular limiting block 81 limits the opening and closing buffering assembly 6.

[0038] Further, the right end of the rectangular limiting block 81 is provided with a U-shaped groove, and a roller 82 is rotatably connected in the U-shaped groove, when the right end of the rectangular limiting block 81 is located in the positioning groove 670, the outer wall of the roller 82 abuts against the right side of the inner wall of the positioning groove 670, when the right end of the rectangular limiting block 81 is located in the limiting sliding groove 671, the outer wall of the roller 82 abuts against the right side of the inner wall of the limiting sliding groove 671, so as to reduce the friction, which is beneficial to the up-down buffering movement of the opening and closing buffering assembly 6.

[0039] Further, the middle of the left side of the rectangular limiting block 81 is provided with a pull rod 83, the left end of the pull rod 83 passes through the left side of the inner wall of the rectangular cover body 80 to the outside, and the left end of the pull rod 83 is provided with a pull ring 85, so as to facilitate the staff to pull the pull rod 83, so that the pull rod 83 drives the rectangular limiting block 81 to move left, and when the closing is closed, the right end of the rectangular limiting block 81 is moved out of the limiting sliding groove 671, so that the vertical plate 67 can be moved up, and then the moving contact 5 and the static contact 4 are contacted.

[0040] Further, the left side of the rectangular limiting block 81 and the position close to the front and rear ends are provided with the second spring 84, the left end of the second spring 84 abuts against the left side of the inner wall of the rectangular cover body 80, and under the action of the two second springs 84, when the opening buffer assembly 6 is lowered, the right end of the rectangular limiting block 81 can be quickly moved to the right in the limiting sliding groove 671, so as to ensure the response efficiency of the limiting assembly 8.

[0041] The opening buffer device of the pole-mounted circuit breaker in the embodiment is used, when opening is needed, the quick disconnecting mechanism 7 in the installation box 1 is started, the connecting rod 60 in the opening buffer assembly 6 is driven to move downward, the oil tank 61 at the top end of the connecting rod 60 is lowered, the viscous oil flows through the oil flow hole 620 at the bottom of the piston plate 62 to generate damping resistance, and the downward speed of the moving contact 5 is slowed down; at the same time, the second vertical rod 65 in the opening buffer assembly 6 drives the vertical plate 67 to move downward, the limiting sliding groove 671 at the left side of the vertical plate 67 is synchronously lowered, at this time, the rectangular limiting block 81 of the limiting assembly 8 moves right under the elastic force of the second spring 84, so that the roller 82 at the right end of the rectangular limiting block 81 is embedded in the limiting sliding groove 671, the upward rebound of the vertical plate 67 is limited, the moving contact 5 and the static contact 4 are completely separated, and the opening buffer assembly 6 is ensured; when closing is needed, the staff pulls the pull rod 83 outward through the pull ring 85, drives the rectangular limiting block 81 to move left, so that the roller 82 exits the limiting sliding groove 671, at this time, the first spring 66 in the opening buffer assembly 6 pushes the push plate 64 and the second vertical rod 65 to move upward, drives the moving contact 5 and the static contact 4 to contact, and the closing operation is completed.

[0042] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the industry that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A tripping buffer device for a pole-mounted circuit breaker, comprising a mounting box (1), wherein connecting feet (2) are provided on both the left and right sides of the bottom of the mounting box (1), and a quick-disconnection mechanism (7) is provided inside the mounting box (1), characterized in that: The top of the mounting box (1) is provided with three equally spaced outer shells (3). A stationary contact (4) is fixedly connected through the middle of the top of the outer shell (3). A tripping buffer assembly (6) is slidably connected inside the outer shell (3). The tripping buffer assembly (6) includes a connecting rod (60) connected to a quick disconnect mechanism (7). The top of the connecting rod (60) is provided with an oil tank (61) for holding viscous oil. A piston plate (62) is slidably connected inside the oil tank (61). Multiple oil passage holes (620) are opened at the bottom of the piston plate (62). A first upright (63) is provided at the middle of the top of the piston plate (62). The top of the first upright (63) passes through the top of the inner wall of the oil tank (61) and is fixedly connected to the push plate (64). The outer side of the first upright (63) is fitted with a first spring (66). The middle of the top of the push plate (64) is provided with a second upright (65). The top of the second upright (65) is provided with a moving contact (5). The outer wall of the second upright (65) is provided with a vertical plate (67). A limiting groove (671) is opened on the left side of the vertical plate (67). A positioning groove (670) is opened on the left side of the bottom of the inner wall of the limiting groove (671). The outer wall of the outer shell (3) is provided with a limiting component (8) for limiting the vertical movement range of the vertical plate (67).

2. The tripping buffer device for a pole-mounted circuit breaker according to claim 1, characterized in that: The bottom end of the first spring (66) abuts against the top of the oil tank (61), and the top end of the first spring (66) abuts against the bottom of the push plate (64).

3. The tripping buffer device for a pole-mounted circuit breaker according to claim 1, characterized in that: The limiting component (8) includes a rectangular cover (80) fixedly connected to the outer wall of the outer shell (3), and the rectangular cover (80) is connected to the outer shell (3). A rectangular limiting block (81) is slidably connected inside the rectangular cover (80).

4. The tripping buffer device for a pole-mounted circuit breaker according to claim 3, characterized in that: When the stationary contact (4) and the moving contact (5) are in contact, the right end of the rectangular limiting block (81) is located in the positioning groove (670). When the stationary contact (4) and the moving contact (5) are separated, the right end of the rectangular limiting block (81) is located in the limiting groove (671).

5. The tripping buffer device for a pole-mounted circuit breaker according to claim 3, characterized in that: The right end of the rectangular limiting block (81) is provided with a U-shaped groove, and a roller (82) is rotatably connected in the U-shaped groove. When the right end of the rectangular limiting block (81) is located in the positioning groove (670), the outer wall of the roller (82) abuts against the right side of the inner wall of the positioning groove (670). When the right end of the rectangular limiting block (81) is located in the limiting slide (671), the outer wall of the roller (82) abuts against the right side of the inner wall of the limiting slide (671).

6. The tripping buffer device for a pole-mounted circuit breaker according to claim 5, characterized in that: A pull rod (83) is provided in the middle of the left side of the rectangular limiting block (81). The left end of the pull rod (83) passes through the left side of the inner wall of the rectangular cover (80) to the outside. A pull ring (85) is provided at the left end of the pull rod (83).

7. The tripping buffer device for a pole-mounted circuit breaker according to claim 6, characterized in that: A second spring (84) is provided on the left side of the rectangular limiting block (81) and near both the front and rear ends. The left end of the second spring (84) abuts against the left side of the inner wall of the rectangular cover (80).

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