Modularized backup protection device and surge protector

Abstract

The utility model relates to the field of surge protector equipment, in particular to a modularized backup protection device and a surge protector. The modularized backup protection device provided by the utility model comprises a connecting rod assembly, a movable contact assembly and a trigger assembly, the connecting rod assembly is movably matched with a first shell, and the movable contact assembly and the trigger assembly are respectively movably matched with a second shell. The connecting rod assembly is provided with a first abutting face and a second abutting face which extend out of the first shell and are used for being matched with the movable contact assembly and the trigger assembly, the first shell is detachably matched with the second shell in the first direction, and the first abutting face and the second abutting face are both parallel to the first direction.

Description

Technical Field

[0001] The utility model relates to the field of surge protector equipment, in particular to a modular backup protection device and a surge protector. Background Art

[0002] In order to realize the active disconnection function of the backup protection breaker of the surge protector, the backup protection breaker of the surge protector now controls the action of the electromagnetic release through the current transformer. The action side of the electromagnetic release is then coordinated with the mobile component in the interval structure arranged on the grounding circuit through a linkage device. For example, the mobile component is constrained by using a hook and a slot to prevent the mobile component from moving to the point of separation from the contacts at the ends of the interval structure under the action of the disconnecting spring. When the active disconnection action is triggered, the electromagnetic release drives the hook to separate from the mobile component, so that the mobile component moves to separate from the grounding circuit, thereby disconnecting the grounding circuit.

[0003] The problem with the above solution is that the linkage mechanism introduced into the existing backup protection device consists of multiple components, which are used to transmit the action between the trigger assembly and the movable contact assembly, so that the smaller restraining force of the trigger assembly can balance the larger elastic force of the trip spring. The introduction of the linkage mechanism increases the number of components in the backup protection device of the surge protector, making assembly more complicated. Utility Model Content

[0004] On the one hand, the utility model provides a backup protection breaker linkage device, which can simplify the assembly of the backup protection breaker after the linkage mechanism is introduced;

[0005] On the other hand, the utility model provides a surge protector.

[0006] The modular backup protection device provided by the present utility model includes a connecting rod assembly, a moving contact assembly and a trigger assembly. The connecting rod assembly is movably matched with the first shell, and the moving contact assembly and the trigger assembly are respectively movably matched with the second shell. The connecting rod assembly has a first abutment surface and a second abutment surface extending out of the first shell for matching with the moving contact assembly and the trigger assembly. The first shell is detachably matched with the second shell along a first direction, and the first abutment surface and the second abutment surface are both parallel to the first direction.

[0007] Furthermore, a positioning assembly movably engaged with the connecting rod assembly is provided in the first housing.

[0008] Furthermore, the positioning assembly includes a support rod, one end of the support rod is fixedly connected to the first shell, and the other end is located in the spacing structure opened on the connecting rod assembly, the first shell is provided with a through opening corresponding to the support rod, the support rod is inclined along the first direction, and a pushing surface is provided on the side facing the through opening, and the second shell is provided with a pushing rod corresponding to the through opening, which can pass through the through opening along the first direction and resist the pushing surface to disengage the support rod from the spacing structure.

[0009] Furthermore, the first shell and the second shell are fixed by screws.

[0010] Furthermore, the positioning assembly also includes a limit rod fixedly connected to the first shell, and the support rod and the limit rod are located in a spacing structure opened on the connecting rod assembly, and respectively abut against the end faces of both ends of the spacing structure along the moving direction of the connecting rod assembly.

[0011] Furthermore, the support rod has a first section and a second section connected in sequence, the first section is fixedly connected to the first shell located at the edge of the through port, and is inclined along the first direction toward the spacing structure, the pushing surface is located on the first section, the second section is parallel to the first direction, and a blocking block is provided at the end of the second section away from the first section, and the blocking block is inserted into the spacing structure along a direction perpendicular to the first direction.

[0012] Furthermore, the trigger component includes a bracket part and a movable part, the movable part and the bracket part are adsorbed and matched through the magnetic field force of the permanent magnet, a coil component is sleeved on the bracket part, the coil component is electrically connected to the mutual inductor sleeved on the grounding line, and the movable part abuts against the first abutting surface.

[0013] Furthermore, the trigger assembly is movably matched with the third shell, and the third shell is detachably matched with the first shell.

[0014] Furthermore, the positioning assembly includes a support rod, one end of which is detachably engaged with the first shell, and the other end of which is located in a spacing structure provided on the connecting rod assembly.

[0015] The surge protector provided by the utility model comprises a lightning protection element. The moving contact assembly in any one of the above modular backup protection devices and the lightning protection element are connected in series on a grounding circuit. Beneficial effects

[0016] In this solution, a connecting rod assembly that realizes the linkage between the moving contact assembly and the trigger assembly is arranged in the first housing to form a relatively independent integrated component. The moving contact assembly, the trigger assembly and the connecting rod assembly form a backup protection device integrated component in the first housing. After the first housing and the second housing are matched, the first abutting surface and the second abutting surface of the connecting rod assembly respectively match with the moving contact assembly and the trigger assembly, thereby realizing the transmission effect. When matching, the connecting rod assembly is matched with the first housing, the moving contact assembly and the trigger assembly are matched with the second housing, and then the first housing is assembled with the second housing along the first direction. Since the first abutting surface and the second abutting surface of the connecting rod assembly are parallel to the first direction, the first abutting surface and the second abutting surface can move along the first direction with the first housing to abut against the corresponding structures of the moving contact assembly and the trigger assembly, thereby realizing the connection of the connecting rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0018] Figure 1 This is a schematic structural diagram of the connecting rod assembly provided by an embodiment of the present utility model when it cooperates with the moving contact assembly and the trigger assembly;

[0019] Figure 2 This is a schematic structural diagram of the connecting rod assembly provided by an embodiment of the present utility model when it is not coordinated with the moving contact assembly and the trigger assembly;

[0020] Figure 3 It is a structural diagram of the cooperation between the connecting rod assembly and the positioning assembly provided in an embodiment of the present utility model.

[0021] Figure numbers: 1-first housing; 2-moving contact assembly; 3-second housing; 4-trigger assembly; 5-third housing; 6-push rod; 7-connecting hole; 8-first abutting surface; 9-second abutting surface; 10-blocking block; 11-limiting rod; 12-spacer structure; 13-through port; 14 first section; 15-second section. DETAILED DESCRIPTION

[0022] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention. Example

[0023] like Figures 1 to 3A modular backup protection device shown in the figure includes a connecting rod assembly, a moving contact assembly 2 and a trigger assembly 4. The connecting rod assembly is movably engaged with the first shell 1, and the moving contact assembly 2 and the trigger assembly 4 are respectively movably engaged with the second shell 3. The connecting rod assembly has a first abutment surface 8 and a second abutment surface 9 extending out of the first shell 1 for engaging with the moving contact assembly 2 and the trigger assembly 4. The first shell 1 is detachably engaged with the second shell 3 along a first direction, and the first abutment surface 8 and the second abutment surface 9 are both parallel to the first direction.

[0024] To address the coordination problem between the restraining force of the electromagnetic tripper (trigger assembly 4) and the elastic force of the disconnect spring of the movable contact assembly 2 in the backup protection active disconnect scheme, a linkage device is introduced into the existing backup protection device. The linkage device includes multiple components and is used to transmit the action between the trigger assembly 4 and the movable contact assembly 2, so that the smaller restraining force of the trigger assembly 4 can balance the larger elastic force of the disconnect spring. The introduction of the linkage device adds many components to the backup protection device of the surge protector, making assembly more complicated. To address the assembly complexity of the backup protection device after the introduction of the linkage device, the present solution arranges the connecting rod assembly that realizes the linkage between the movable contact assembly 2 and the trigger assembly 4 within the first housing 1 to form a relatively independent integrated component. The movable contact assembly 2, the trigger assembly 4, and the connecting rod assembly form a backup protection device integrated component within the first housing 1. After the first housing 1 is mated with the second housing 3, the first abutting surface 8 and the second abutting surface 9 of the connecting rod assembly respectively mate with the movable contact assembly 2 and the trigger assembly 4, thereby achieving a transmission effect. During the mating process, the connecting rod assembly is mated with the first shell 1, the moving contact assembly 2 and the trigger assembly 4 are mated with the second shell 3, and then the first shell 1 is assembled with the second shell 3 along the first direction. Since the first abutting surface 8 and the second abutting surface 9 of the connecting rod assembly are parallel to the first direction, the first abutting surface 8 and the second abutting surface 9 can move along the first direction with the first shell 1 to abut against the corresponding structures of the moving contact assembly 2 and the trigger assembly 4, thereby realizing the access of the connecting rod assembly.

[0025] In an optional embodiment, a positioning assembly movably engaged with the connecting rod assembly is provided in the first housing 1 .

[0026] The function of the positioning assembly is to ensure that the connecting rod assembly remains in a mating state when it is not mated with the moving contact assembly 2 and the trigger assembly 4, so that when the first shell 1 is mated with the second shell 3 along the first direction, its first abutting surface 8 and the second abutting surface 9 are in a position where they can abut against the moving contact assembly 2 and the trigger device.

[0027] The connecting rod assembly is used to realize the transmission of action between the trigger assembly 4 and the moving contact assembly 2, and includes multiple parts. When the connecting rod assembly is not coordinated with the moving contact assembly 2 and the trigger assembly 4, the connecting rod assembly is not subject to the restraining force of the trigger assembly 4 and the elastic force of the breaking spring of the moving contact assembly 2. Therefore, the parts of the connecting rod assembly are in a movable state. To facilitate the assembly of the connecting rod assembly, the positioning assembly cooperates with one or more parts of the connecting rod assembly in the first shell 1 to prevent it from moving.

[0028] The positioning assembly can be separated from the components of the connecting rod assembly after the first housing 1 and the second housing 3 are matched.

[0029] In an optional embodiment, the positioning assembly includes a support rod, one end of the support rod is fixedly connected to the first shell 1, and the other end is located in the spacing structure 12 opened on the connecting rod assembly. The first shell 1 is provided with a through opening 13 corresponding to the support rod, and the support rod is inclined along the first direction, and a pushing surface is provided on the side facing the through opening 13. The second shell 3 is provided with a pushing rod 6 corresponding to the through opening 13, which can pass through the through opening 13 along the first direction and resist the pushing surface to disengage the support rod from the spacing structure 12.

[0030] The positioning assembly includes a support rod fixedly connected to the shell, and a spacing structure 12 is provided on a component of the connecting rod assembly. The support rod is located in the spacing structure 12 and abuts against the end faces of the spacing structure 12 at both ends along the moving direction of the connecting rod assembly. That is, the support rod constrains the connecting rod assembly along its moving direction, so that it remains in a position where the first abutment surface 8 and the second abutment surface 9 can abut against each other.

[0031] The support rod is tilted compared to the first direction, or the pushing surface of the support rod is tilted compared to the first direction, and the pushing surface faces the through-hole 13. When the first shell 1 cooperates with the second shell 3 along the first direction, the pushing rod 6 on the second shell 3 passes through the through-hole 13 on the first shell 1 and enters the first shell 1, and is against the pushing surface of the support rod, and continues to push the pushing surface along the first direction, so that the support rod is deformed and bent to disengage from the spacing structure 12.

[0032] After the support rod is separated from the connecting rod assembly, the connecting rod assembly remains stationary due to the balance of forces between the moving contact assembly 2 and the trigger assembly 4. When the backup protection device triggers the backup protection action, the restraining force of the trigger assembly 4 disappears, so the connecting rod assembly rotates under the action of the disconnecting spring of the moving contact assembly 2. Since the support rod is separated from the connecting rod assembly, the connecting rod assembly moves.

[0033] Alternatively, the positioning assembly includes a support rod, one end of which is detachably engaged with the first housing 1 , and the other end of which is located in the spacing structure 12 provided on the connecting rod assembly.

[0034] In an optional embodiment, the first shell 1 and the second shell 3 are fixed by screws.

[0035] The screw can have the function of the above-mentioned support rod. The screw is engaged with the first shell 1 along the first direction. A part of the screw is located in the spacing structure 12 and is against the end faces of the spacing structure 12 along the moving direction of the connecting rod assembly, that is, the screw constrains the connecting rod assembly along its moving direction.

[0036] When the first housing 1 is mated with the second housing 3 , the screw is rotated until it engages with the corresponding connecting hole 7 of the second housing 3 , and the screw is screwed in the first direction until it disengages from the spacing structure 12 .

[0037] In an optional embodiment, the positioning assembly also includes a limit rod 11 fixedly connected to the first shell 1. The support rod and the limit rod 11 are located in a spacing structure 12 opened on the connecting rod assembly, and respectively abut against the end faces of the spacing structure 12 along the moving direction of the connecting rod assembly.

[0038] The support rod and the limit rod 11 are located in the spacing structure 12, which constrain the connecting rod assembly along its moving direction. Since the movement of the moving contact assembly 2 is unidirectional, the connecting rod assembly that cooperates with the moving contact assembly 2 also moves unidirectionally with the moving contact assembly 2 when there is no constraining force provided by the trigger assembly 4. The support rod constrains the connecting rod assembly along its moving direction, and the limit rod 11 constrains the connecting rod assembly in the opposite direction to the constraint direction of the support rod. Both of them make the connecting rod assembly unable to move in any direction, and the first abutment surface 8 and the second abutment surface 9 are in a position where they can abut each other.

[0039] After the support rod is disengaged from the connecting rod assembly, the connecting rod assembly remains stationary due to the balance of forces exerted by the moving contact assembly 2 and the trigger assembly 4. When the backup protection device triggers the backup protection action, the restraining force of the trigger assembly 4 disappears. Therefore, under the action of the disconnecting spring of the moving contact assembly 2, the connecting rod assembly moves accordingly. The limit rod 11 disengages and gradually moves away from the end face of the spacing structure 12 that is against it, gradually approaches the end face of the spacing structure 12 that is against the original support rod, and finally against it, thereby realizing the limited distance movement of the connecting rod assembly.

[0040] In an optional embodiment, the support rod has a first section 14 and a second section 15 connected in sequence, the first section 14 is fixedly connected to the first shell 1 located at the edge of the through port 13, and is inclined toward the spacing structure 12 along the first direction, the pushing surface is located on the first section 14, the second section 15 is parallel to the first direction, and a blocking block 10 is provided at the end of the second section 15 away from the first section 14, and the blocking block 10 is inserted into the spacing structure 12 along a direction perpendicular to the first direction.

[0041] The first section 14 of the support rod is inclined toward the spacing structure 12, and the second section 15 is vertical along the first direction. A blocking block 10 is provided at the end of the second section 15. When the first shell 1 cooperates with the second shell 3 along the first direction, the push rod 6 on the second shell 3 passes through the through hole 13 on the first shell 1 and enters the first shell 1, and is against the pushing surface of the second section 15 of the support rod, pushing the second section 15 of the support rod to deform, from being bent toward the spacing structure 12 to being vertical close to the first direction, and the second section 15 gradually swings from being vertical along the first direction to away from the spacing structure 12, so that the blocking block 10 disengages from the spacing structure 12.

[0042] In an optional embodiment, the trigger component 4 includes a bracket part and a movable part. The movable part and the bracket part are adsorbed and matched through the magnetic field force of the permanent magnet. A coil component is mounted on the bracket part. The coil component is electrically connected to a mutual inductor mounted on the grounding line. The movable part abuts against the first abutting surface 8.

[0043] The bracket is C-shaped with an opening on one side and abutment ends on both sides of the opening. The permanent magnet magnetizes the bracket, and the two abutment ends attract the movable part and abut it under the action of the magnetic field, that is, the movable part maintains a fixed relative position, and the third connecting rod that abuts against the hook on the movable part cannot rotate, and the first connecting rod and the second connecting rod that cooperate with it cannot rotate, thereby generating a restraining force on the moving contact assembly 2.

[0044] The coil assembly is mounted on the bracket, and its wire is connected to the secondary side of the transformer. The transformer is mounted on the ground loop. When the calibrated current flows through the ground loop, the current generated by the transformer causes the coil assembly to generate a magnetic field. This magnetic field offsets the magnetic field of the permanent magnet or the two offset and weaken it to the point where its suction force on the movable part is less than the elastic force acting on the movable part after the breaking spring acts on the connecting rod assembly, causing the movable part to separate from the bracket. Thereafter, the trigger assembly 4 cannot generate any restraining force on the moving assembly.

[0045] In an optional embodiment, the trigger assembly 4 is movably matched with the third shell 5, and the third shell 5 is detachably matched with the first shell 1.

[0046] The bracket is fixedly matched with the third shell 5 in the third shell 5. A through hole 13 is provided on the third shell 5. A part of the movable part is located in the third shell 5 and adsorbed with the bracket, and the other part passes through the through hole 13 and matches with the connecting rod assembly outside the third shell 5.

[0047] The surge protector provided by the utility model comprises a lightning protection element. The moving contact assembly 2 in the modular backup protection device and the lightning protection element are connected in series on a grounding circuit.

[0048] The lightning protection element is located on the grounding circuit, and a disconnecting gap is also provided on the grounding circuit. The moving contact assembly 2 of the backup protection device cooperates with the disconnecting gap under normal conditions to connect the contacts on both sides of the disconnecting gap. The moving contact assembly 2 can move to the contact on both sides of the disconnecting gap on the grounding circuit under the action of the disconnecting spring, so that the backup protection breaker triggers the disconnecting operation.

[0049] It should be noted that any of the above embodiments are illustrative of the present invention rather than limiting thereof, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words primary, secondary, previous, and next etc. does not indicate any order. These words may be interpreted as names.

[0050] The above embodiments are only suitable for illustrating the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims

1. A modular backup protection device, comprising a connecting rod assembly, a moving contact assembly (2) and a trigger assembly (4), characterized in that: The connecting rod assembly is movably engaged with the first housing (1), and the movable contact assembly (2) and the trigger assembly (4) are movably engaged with the second housing (3) respectively. The connecting rod assembly has a first abutting surface (8) and a second abutting surface (9) extending out of the first housing (1) for engaging with the movable contact assembly (2) and the trigger assembly (4). The first housing (1) is detachably engaged with the second housing (3) along a first direction, and the first abutting surface (8) and the second abutting surface (9) are both parallel to the first direction.

2. The modular backup protection device according to claim 1, characterized in that: A positioning assembly movably engaged with the connecting rod assembly is provided in the first housing (1).

3. The modular backup protection device according to claim 2, characterized in that: The positioning assembly includes a support rod, one end of which is fixedly connected to the first shell (1), and the other end of which is located in a spacing structure (12) provided on the connecting rod assembly. The first shell (1) is provided with a through opening (13) corresponding to the support rod, and the support rod is tilted along a first direction and provided with a pushing surface on a side facing the through opening (13). The second shell (3) is provided with a pushing rod (6) corresponding to the through opening (13), which can pass through the through opening (13) along the first direction and abut against the pushing surface to disengage the support rod from the spacing structure (12).

4. The modular backup protection device according to claim 3, characterized in that: The first shell (1) and the second shell (3) are fixed by screws.

5. The modular backup protection device according to claim 3, characterized in that: The positioning assembly further comprises a limiting rod (11) fixedly connected to the first housing (1); the support rod and the limiting rod (11) are located in a spacing structure (12) provided on the connecting rod assembly, and respectively abut against both end faces of the spacing structure (12) along the moving direction of the connecting rod assembly.

6. The modular backup protection device according to claim 3, characterized in that: The support rod comprises a first section (14) and a second section (15) connected in sequence, the first section (14) being fixedly connected to the first shell (1) located at the edge of the through opening (13), and being inclined along a first direction toward the spacing structure (12), the pushing surface being located on the first section (14), the second section (15) being parallel to the first direction, and a blocking block (10) being provided at the end of the second section (15) away from the first section (14), the blocking block (10) being inserted into the spacing structure (12) along a direction perpendicular to the first direction.

7. The modular backup protection device according to claim 1, characterized in that: The trigger component (4) comprises a bracket component and a movable component, the movable component and the bracket component are adsorbed and matched by the magnetic field force of the permanent magnet, a coil component is sleeved on the bracket component, the coil component is electrically connected to a mutual inductor sleeved on the grounding line, and the movable component abuts against the first abutting surface (8).

8. The modular backup protection device according to claim 1, characterized in that: The trigger assembly (4) is movably engaged with the third housing (5), and the third housing (5) is detachably engaged with the first housing (1).

9. The modular backup protection device according to claim 2, characterized in that: The positioning assembly comprises a support rod, one end of which is detachably engaged with the first housing (1), and the other end of which is located in a spacing structure (12) provided on the connecting rod assembly.

10. A surge protector, comprising a lightning protection element, characterized in that: The moving contact assembly (2) and the lightning protection element in the modular backup protection device according to any one of claims 1 to 9 are connected in series on a grounding circuit.

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