Contact box mounting plate, valve mechanism and switch cabinet

Abstract

The utility model belongs to the field of electric switch devices, and particularly provides a contact box mounting plate, a valve mechanism and a switch cabinet. The contact box mounting plate comprises a plate body, an upper valve lower limiting structure used for determining the lower limit position of an upper valve and a lower valve upper limiting structure used for determining the upper limit position of the lower valve are arranged on the plate body, and the upper valve lower limiting structure and the lower valve upper limiting structure are integrally formed with the plate body in a punching mode. The valve mechanism and the switch cabinet both comprise the contact box mounting plate. The upper valve lower position limiting structure and the lower valve upper position limiting structure are both integrally formed with the plate body in a stamping mode, at the moment, a corresponding connecting structure can be omitted firstly, the structure is simpler, meanwhile, the assembling process does not exist, errors caused by assembling do not exist, and use is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of electrical switch devices, and in particular relates to a contact box mounting plate, a valve mechanism, and a switch cabinet. Background Technology

[0002] To ensure personnel safety and equipment reliability, switchgear is generally equipped with a valve mechanism. The valve mechanism includes a movable valve that automatically closes when the circuit breaker trolley is moved out, thus blocking the stationary contact holes (including busbar contact holes and outgoing contact holes) to prevent personnel from accidentally touching live parts.

[0003] Utility model patent CN218040221U discloses a valve mechanism for a high-voltage switchgear. This mechanism includes a contact box mounting plate, an upper valve, a lower valve, a valve drive mechanism, and guide rods. The guide rods are installed on the left and right sides of the contact box mounting plate. The valve drive mechanism is connected to the upper and lower valves and drives them to move up and down along the guide rods. Specifically, when the circuit breaker trolley is moved out, the upper valve moves downwards and the lower valve moves upwards, respectively blocking the busbar contact hole and the outgoing line contact hole. To improve the positioning accuracy of the upper and lower valves and ensure that they are in the optimal positions for blocking the busbar contact holes and outgoing contact holes, limit brackets are provided at both ends of the contact box mounting plate. Specifically, the limit brackets are provided in two sets, one upper and one lower, each set including two limit brackets. The upper set of limit brackets is located below the upper valve, and the lower set of limit brackets is located above the lower valve, so as to limit the lower limit position of the upper valve and the upper limit position of the lower valve respectively.

[0004] In the aforementioned valve mechanism, the limit frame includes a mounting base plate and a limit plate integrated with the mounting base plate, and the mounting base plate is fixed to the contact box mounting plate by screws or rivets. This method of assembling the limit frame and the contact box mounting plate into one unit results in a complex structure, and errors are prone to occur during assembly, which can seriously lead to the limit frame being in the optimal limit position. Utility Model Content

[0005] The purpose of this invention is to provide a contact box mounting plate to solve the technical problems of complex structure and assembly errors in the limiting part of the valve mechanism used for valve limiting in the prior art. Another purpose of this invention is to provide a valve mechanism and switch cabinet using the above-mentioned contact box mounting plate to solve the same technical problems.

[0006] To achieve the above objectives, the technical solution for the contact box mounting plate provided by this utility model is as follows:

[0007] A contact box mounting plate includes a plate body, on which are disposed an upper valve lower limit structure for determining the lower limit position of the upper valve and an upper valve upper limit structure for determining the upper limit position of the lower valve. Both the upper valve lower limit structure and the lower valve upper limit structure are integrally stamped with the plate body.

[0008] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include a limit flap on at least one side of the contact box mounting hole provided on the plate, and the plate surface of the limit flap extends in the left and right direction.

[0009] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include limit flaps on the left and right sides of the contact box mounting hole provided on the plate.

[0010] As a further improvement, each limit flap is provided with a through hole through which the two guide rods of the valve mechanism pass vertically to limit the left and right swaying of the guide rods.

[0011] As a further improvement, the plate is also integrally stamped with guide rod support flaps located on the left and right sides of the contact box mounting hole, which are used to support the two guide rods respectively. The guide rod support flaps are equipped with support holes coaxial with the through hole so that the lower end of the guide rod can pass through or enter to limit the left and right sway of the guide rod.

[0012] As a further improvement, the limiting flap of the lower limiting structure of the upper valve folds from top to bottom, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body; the limiting flap of the upper limiting structure of the lower valve folds from bottom to top, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body.

[0013] As a further improvement, the folding direction of the limiting flaps of the upper valve lower limit structure and the lower valve upper limit structure is the same.

[0014] As a further improvement, the plate is integrally formed with independent guide rod mounting structures located on the left and right sides of the contact box mounting holes provided on the plate, for fixing the guide rods of the valve mechanism.

[0015] This utility model innovatively proposes a novel contact box mounting plate, the advantages of which are: when the upper and lower valves are in normal use, the lower limiting structure of the upper valve and the upper limiting structure of the lower valve can still determine the optimal closing position of the contact holes of the upper and lower valves. Unlike existing technologies, both the lower limiting structure of the upper valve and the upper limiting structure of the lower valve are integrally formed with the plate body. This eliminates the need for corresponding connecting structures, simplifying the structure and eliminating assembly processes, thus avoiding assembly errors and facilitating use.

[0016] To achieve the above objectives, the technical solution of the valve mechanism provided by this utility model is as follows:

[0017] A valve mechanism includes a contact box mounting plate, an upper valve, and a lower valve. Both the upper and lower valves can move up and down relative to the contact box mounting plate. The contact box mounting plate includes a plate body, on which are disposed a lower limit structure for determining the lower limit position of the upper valve and an upper limit structure for determining the upper limit position of the lower valve. Both the lower limit structure and the upper limit structure are integrally stamped with the plate body.

[0018] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include a limit flap on at least one side of the contact box mounting hole provided on the plate, and the plate surface of the limit flap extends in the left and right direction.

[0019] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include limit flaps on the left and right sides of the contact box mounting hole provided on the plate.

[0020] As a further improvement, each limit flap is provided with a through hole through which the two guide rods of the valve mechanism pass vertically to limit the left and right swaying of the guide rods.

[0021] As a further improvement, the plate is also integrally stamped with guide rod support flaps located on the left and right sides of the contact box mounting hole, which are used to support the two guide rods respectively. The guide rod support flaps are equipped with support holes coaxial with the through hole so that the lower end of the guide rod can pass through or enter to limit the left and right sway of the guide rod.

[0022] As a further improvement, the limiting flap of the lower limiting structure of the upper valve folds from top to bottom, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body; the limiting flap of the upper limiting structure of the lower valve folds from bottom to top, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body.

[0023] As a further improvement, the folding direction of the limiting flaps of the upper valve lower limit structure and the lower valve upper limit structure is the same.

[0024] As a further improvement, the plate is integrally formed with independent guide rod mounting structures located on the left and right sides of the contact box mounting holes provided on the plate, for fixing the guide rods of the valve mechanism.

[0025] This utility model is an improved invention, and its beneficial effects are as follows: When the upper and lower valves are in normal use, the lower limiting structure of the upper valve and the upper limiting structure of the lower valve can still determine the optimal closing and blocking contact hole positions of the upper and lower valves. Unlike existing technologies, both the lower limiting structure of the upper valve and the upper limiting structure of the lower valve are integrally formed with the plate body. This eliminates the need for corresponding connecting structures, simplifying the structure and eliminating assembly processes, thus avoiding assembly errors and facilitating use.

[0026] To achieve the above objectives, the technical solution for the switchgear provided by this utility model is as follows:

[0027] A switch cabinet includes a circuit breaker and a valve mechanism. The valve mechanism includes a contact box mounting plate, an upper valve, and a lower valve. Both the upper and lower valves can move up and down relative to the contact box mounting plate. The contact box mounting plate includes a plate body. The plate body is provided with a lower limit structure for determining the lower limit position of the upper valve and an upper limit structure for determining the upper limit position of the lower valve. Both the lower limit structure and the upper limit structure are integrally stamped with the plate body.

[0028] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include a limit flap on at least one side of the contact box mounting hole provided on the plate, and the plate surface of the limit flap extends in the left and right direction.

[0029] As a further improvement, both the lower limit structure of the upper valve and the upper limit structure of the lower valve include limit flaps on the left and right sides of the contact box mounting hole provided on the plate.

[0030] As a further improvement, each limit flap is provided with a through hole through which the two guide rods of the valve mechanism pass vertically to limit the left and right swaying of the guide rods.

[0031] As a further improvement, the plate is also integrally stamped with guide rod support flaps located on the left and right sides of the contact box mounting hole, which are used to support the two guide rods respectively. The guide rod support flaps are equipped with support holes coaxial with the through hole so that the lower end of the guide rod can pass through or enter to limit the left and right sway of the guide rod.

[0032] As a further improvement, the limiting flap of the lower limiting structure of the upper valve folds from top to bottom, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body; the limiting flap of the upper limiting structure of the lower valve folds from bottom to top, and at least one of the left and right ends of the limiting flap is provided with a supporting flange that abuts against the plate body.

[0033] As a further improvement, the folding direction of the limiting flaps of the upper valve lower limit structure and the lower valve upper limit structure is the same.

[0034] As a further improvement, the plate is integrally formed with independent guide rod mounting structures located on the left and right sides of the contact box mounting holes provided on the plate, for fixing the guide rods of the valve mechanism.

[0035] This utility model is an improved invention, and its beneficial effects are as follows: When the upper and lower valves are in normal use, the lower limiting structure of the upper valve and the upper limiting structure of the lower valve can still determine the optimal closing and blocking contact hole positions of the upper and lower valves. Unlike existing technologies, both the lower limiting structure of the upper valve and the upper limiting structure of the lower valve are integrally formed with the plate body. This eliminates the need for corresponding connecting structures, simplifying the structure and eliminating assembly processes, thus avoiding assembly errors and facilitating use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the valve mechanism in this utility model;

[0037] Figure 2 for Figure 1 Schematic diagram of the structure of the middle contact box mounting plate;

[0038] Figure 3 for Figure 2 A magnified view of the lower limit flap.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Upper valve; 2. Lower valve; 301. Upper limit flap; 302. Lower limit flap; 4. Guide rod; 5. Connecting rod; 6. Valve drive device; 7. Guide rod supporting flap; 401. Limit sleeve; 100. Plate body. Detailed Implementation

[0041] To address the issues of structural complexity and assembly errors inherent in existing limit structures for upper and lower valves mounted on the contact box mounting plate, the basic technical concept of this invention is to provide an integrated contact box mounting plate, where the limit structure for upper and lower valves and the contact box mounting plate are integrally stamped. In this design, the separate connecting structure linking the limit structure and the contact box mounting plate can be omitted, resulting in a simpler structure. Furthermore, since assembly is unnecessary, assembly errors are eliminated.

[0042] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0043] Specific embodiments of the valve mechanism provided by this utility model:

[0044] The valve mechanism provided in this embodiment is as follows: Figure 1 As shown, consistent with existing technology, the valve mechanism includes a contact box mounting plate, an upper valve 1, a lower valve 2, a valve drive device 6, and a guide rod 4. The guide rod 4 is mounted on the contact box mounting plate. The upper valve 1 and the lower valve 2 can move up and down along the guide rod 4. A limit sleeve 401 is provided at the top of the guide rod 4 to prevent the upper valve 1 from moving excessively upwards and dislodging from the upper end of the guide rod 4. The valve drive device 6 is used to drive the upper valve 1 and the lower valve 2 to move up and down. Specifically, the valve drive device 6 can be consistent with existing technology, including a swingable upper crank arm, a lower crank arm, a torsion spring, etc. The upper crank arm and the lower crank arm are respectively connected to the lower valve 2 and the upper valve 1 through a connecting rod 5, so that the swinging motion of the upper crank arm and the lower crank arm can be changed to output the linear motion of the lower valve 2 and the upper valve 1 through the connecting rod 5. In addition, the so-called contact box mounting plate must also be provided with contact box mounting holes for mounting the contact box, i.e. Figure 2 The six larger circular holes shown are illustrated.

[0045] Figure 1 The upper valve 1 and lower valve 2 shown are both in a blocked or closed state, obstructing the stationary contact holes. Consistent with existing technology, when the circuit breaker trolley is pushed into the switchgear, the corresponding force-bearing positions on the upper and lower crank arms are pushed, causing them to swing. This, in turn, moves the upper valve 1 upward and the lower valve 2 downward, exposing the corresponding stationary contact holes, allowing the circuit breaker's moving contacts to be inserted into the stationary contacts. When the circuit breaker trolley is removed from the switchgear, the upper valve 1 and lower valve 2 automatically return to the blocked state shown in the figure under the action of the torsion spring.

[0046] It is easy to understand that in order to ensure that the upper valve 1 and the lower valve 2 can be in the optimal blocking position, it is necessary to set a limiting structure on the contact box mounting plate to limit or determine the lower limit position of the upper valve 1 and the upper limit position of the lower valve 2 respectively. The corresponding limiting structure can be defined as the lower limit structure of the upper valve and the upper limit structure of the lower valve.

[0047] In this embodiment, the upper valve lower limit structure and the lower valve upper limit structure are integrally stamped onto the contact box mounting plate. Specifically, as follows... Figure 1 and Figure 2 As shown, the contact box mounting plate includes a plate body 100, and the upper valve lower limit structure and the lower valve upper limit structure are integrally stamped with the plate body 100.

[0048] Compared to existing prefabricated structures, this embodiment requires no additional connection structures, resulting in a simpler structure. Furthermore, this embodiment eliminates the assembly process, thus eliminating assembly errors.

[0049] Regarding how the upper valve lower limit structure and the lower valve upper limit structure are integrally stamped with the plate 100, based on existing stamping processes, several typical embodiments are provided below for illustration. However, those skilled in the art will understand that due to space limitations, not all implementation methods can be exhaustively described here.

[0050] As a possible implementation method, such as Figure 2 As shown, both the lower limiting structure of the upper valve and the upper limiting structure of the lower valve include two limiting flaps arranged at intervals on the plate 100, with the flaps extending in the left-right direction. This allows for a large contact area between the limiting flaps and the upper valve 1 and the lower valve 2. For ease of understanding, the limiting flap of the lower limiting structure of the upper valve can be defined as the upper limiting flap 301, and the limiting flap of the upper limiting structure of the lower valve can be defined as the lower limiting flap 302. The upper limiting flap 301 and the lower limiting flap 302 are respectively located on the left and right sides of the contact box mounting hole of the plate 100. The two upper limiting flaps 301 work together to form a support section with a certain span to support the upper valve 1; similarly, the two lower limiting flaps 302 work together to form a blocking section with a certain span to block the lower valve 2.

[0051] However, it should be emphasized that in some other embodiments, it is not entirely ruled out that a limiting flap is set only on one side of the contact box mounting hole. Since both the upper valve 1 and the lower valve 2 are rigid plate structures, supporting or blocking only one side can play a basic limiting role.

[0052] As another feasible implementation, in addition to the limiting flap extending in the left and right directions as described above, the limiting flap can also be configured to extend in the up and down directions. In this case, although the contact area between the limiting flap and the upper valve 1 and the lower valve 2 is reduced, the contact length between the limiting flap and the plate 100 in the up and down directions is longer, resulting in higher strength and stronger impact resistance of the limiting flap.

[0053] like Figures 1-3 As shown, both the upper limit flap 301 and the lower limit flap 302 are provided with through holes for the two guide rods 4 to pass through vertically. In this case, the lower limit structure of the upper valve and the upper limit structure of the lower valve, in addition to their basic limiting functions, can also limit the guide rods 4, preventing them from swaying left and right. After the guide rods 4 pass through the corresponding through holes, they can be fixed with pins to prevent them from moving up and down relative to the contact box mounting plate. Furthermore, compared to the assembled limiting structure, this design eliminates the need for the part connecting the guide rods 4 to the plate 100, resulting in a more compact overall design.

[0054] Furthermore, to improve the stability of guide rod 4, such as Figure 1 and Figure 2As shown, the plate 100 is also equipped with a guide rod support flap 7, which is located on the left and right sides of the contact box mounting hole and is integrally stamped with the plate 100. Specifically, it can be consistent with the lower limit structure of the upper valve and the upper limit structure of the lower valve. The guide rod support flap 7 is provided with a support hole, which is coaxial with the through hole through which the guide rod 4 passes. The lower end of the guide rod 4 can pass through the support hole (if the support hole is a through hole) or be inserted into the support hole (if the support hole is a blind hole). This forms a three-point support and fixation for the guide rod 4, making the guide rod 4 more stable.

[0055] However, it should be noted that in the preferred embodiments provided above, the upper limit flap 301 and the lower limit flap 302, in addition to their basic limiting function, also have the function of fixing or preventing the guide rod 4 from swaying left and right, that is, integrating the limiting valve and the fixed guide rod into one unit. However, in other embodiments, the limiting flap may only have the function of a limiting valve, while the fixed guide rod adopts a separately set guide rod mounting structure. In this case, the limiting flap does not need to be provided with a through hole. As for the guide rod mounting structure, to facilitate the installation of the guide rod 4, the guide rod mounting structure should also be integrally formed with the plate body 100 and located on the left and right sides of the contact box mounting hole. For ease of understanding, please refer to Figure 3 For example, a guide rod mounting plate can be set on the side of the upper limit flap 301 and the lower limit flap 302 near the edge of the plate body 100. This method has a simple structure and can also make it relatively easy to install the guide rod.

[0056] Regardless of the type of limiting structure used, such as Figure 2 and Figure 3 As shown, the lower limit structure of the upper valve and the upper limit structure of the lower valve are both integrally stamped and bent with the plate 100. The processing technology is conventional, which involves slotting the plate 100 and then stamping and bending it.

[0057] To facilitate the machining of the groove for the bending and limiting flap, in a preferred embodiment, such as... Figure 2 and Figure 3 As shown, the bending directions of the lower limiting structure of the upper valve and the upper limiting structure of the lower valve are the same.

[0058] However, it should be emphasized that in other embodiments, the bending directions of the two can also be different. For example, the bending direction of the limiting flap 301 of the lower limiting structure of the upper valve is from top to bottom, which is different from the bending direction of the upper limiting flap 301. Figure 2To enhance the strength of the upper limit flap 301 and prevent deformation caused by the downward impact of the upper valve 1, a support flange (not shown in the figure) can be provided at least one end of the upper limit flap 301 in the left and right directions. When only one end has a support flange, the upper limit flap 301 can be regarded as an inverted L-shape. When both ends have support flanges, the upper limit flap 301 can be regarded as an inverted "U" shape. The support flange rests against the plate body 100 and can support the upper limit flap 301, making the upper limit flap 301 more stable and reliable.

[0059] Similarly, in this case, the folding direction of the limiting flap 302 of the upper limiting structure of the lower valve is from bottom to top, which is the same as... Figure 2 Conversely, to enhance the strength of the lower limit flap 302 and prevent the lower valve 2 from impacting upwards and causing deformation of the lower limit flap 302, at least one end of the lower limit flap 302 in the left and right directions can be provided with a supporting flange (not shown in the figure). When only one end is provided with a supporting flange, the lower limit flap 302 can be regarded as L-shaped. When both ends are provided with supporting flanges, the lower limit flap 302 can be regarded as "U"-shaped. The supporting flange rests against the plate 100 and can play the role of supporting the lower limit flap 302, making the lower limit flap 302 more stable and reliable.

[0060] Specific embodiments of the contact box mounting plate provided by this utility model:

[0061] The embodiment of the contact box mounting plate is the same as the contact box mounting plate described in the embodiment of the above-mentioned valve mechanism, and will not be described in detail here.

[0062] Specific embodiments of the switch cabinet provided by this utility model:

[0063] The switch cabinet includes circuit breakers and the valve mechanism described in the embodiments of the above-mentioned valve mechanism, which will not be specifically described here.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A contact box mounting plate characterized by, The plate includes a lower limit structure for determining the lower limit position of the upper valve and an upper limit structure for determining the upper limit position of the lower valve. Both the lower limit structure and the upper limit structure are integrally stamped with the plate.

2. The contact box mounting plate of claim 1, wherein, Both the upper valve lower limit structure and the lower valve upper limit structure include a limit flap on at least one side of the contact box mounting hole provided on the plate, and the plate surface of the limit flap extends in the left and right direction.

3. The contact box mounting plate of claim 2, wherein, Both the upper valve lower limit structure and the lower valve upper limit structure include limit flaps on the left and right sides of the contact box mounting hole provided on the plate.

4. The contact box mounting plate of claim 3, wherein, Each limit flap is equipped with a through hole through which the two guide rods of the valve mechanism pass vertically to limit the left and right swaying of the guide rods.

5. The contact box mounting plate of claim 4 wherein the plate body The upper part is integrally stamped with guide rod support flaps located on the left and right sides of the contact box mounting hole, which are used to support the two guide rods respectively. The guide rod support flaps are equipped with support holes coaxial with the through hole so that the lower end of the guide rod can pass through or enter to limit the left and right sway of the guide rod.

6. The contact box mounting plate of any of claims 2-5, wherein, The limiting flap of the lower limiting structure of the upper valve folds from top to bottom, and at least one of the left and right ends of the limiting flap is provided with a supporting flange, which abuts against the plate body; the limiting flap of the upper limiting structure of the lower valve folds from bottom to top, and at least one of the left and right ends of the limiting flap is provided with a supporting flange, which abuts against the plate body.

7. The contact box mounting plate of any of claims 2-5, wherein, The folding direction of the limiting flaps of the upper valve lower limit structure and the lower valve upper limit structure is the same.

8. The contact box mounting plate according to any one of claims 1-3, characterized in that an independent guide rod mounting structure is integrally formed on the plate body, located on the left and right sides of the contact box mounting hole provided on the plate body, for fixing the guide rod of the valve mechanism.

9. A shutter mechanism comprising a contact box mounting plate, an upper shutter, a lower shutter, the upper and lower shutters each being movable up and down relative to the contact box mounting plate, characterised in that, The contact box mounting plate is the contact box mounting plate as described in any one of claims 1-8.

10. A switchgear comprising a circuit breaker and a shutter mechanism, the shutter mechanism comprising a contact box mounting plate, an upper shutter, a lower shutter, the upper shutter and the lower shutter each being movable up and down relative to the contact box mounting plate, characterised in that, The contact box mounting plate is the contact box mounting plate as described in any one of claims 1-8.

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