A multifunctional low voltage power distribution metering cabinet

Abstract

The present invention relates to a multifunctional low-voltage power distribution metering cabinet, which comprises a metering cabinet and a cabinet door hingedly mounted on the front side of the metering cabinet, a left side plate and a right side plate are respectively fixedly mounted on both sides of the metering cabinet, a grounding knife switch is installed in the cabinet room, an operating handle insertion hole corresponding to the grounding knife switch is provided on the right side plate, a swing rod is hingedly mounted on the right side plate, a limit baffle is fixedly mounted on the swing rod, which can follow the swing rod to block and expose the operating handle insertion hole, a top rod that can move forward and backward is hingedly mounted on the swing rod, a pressing part that can make the limit baffle disengage from the blocking state of the operating handle insertion hole when the cabinet door is closed is provided on the cabinet door, a female hook is fixedly mounted on the inner side of the cabinet door, and a sub-hook is mounted on the main shaft, which can rotate with the main shaft when the cabinet door is closed and cooperate with the female hook to implement rotation limit on the cabinet door. The metering cabinet adopts a limit baffle and two mutually cooperating sub- and female hooks to implement interlocking, so that the staff must strictly follow the five electrical protection requirements to operate, thereby ensuring the personal and equipment safety during production and use.

Description

Technical Field

[0001] The invention relates to the field of electrical equipment, in particular to a multifunctional low-voltage power distribution metering cabinet. Background Art

[0002] An electric energy meter cabinet is an electrical device used to measure electric energy between power supply companies and users. In order to ensure the personal safety of the equipment and operators, an earthing knife switch is usually installed in the meter cabinet. The earthing knife switch has a main shaft for controlling its opening and closing. An operating handle insertion hole corresponding to the main shaft is opened on the cabinet wall of the meter cabinet. When the door of the meter cabinet needs to be opened, the operating handle is first inserted into the hole so that the insertion end of the operating handle cooperates with the main shaft in the meter cabinet, and then the operating handle is turned to close the earthing knife switch. Finally, the cabinet door can be opened to handle its equipment.

[0003] The existing metering cabinets have the following disadvantages: 1. The device design is insufficient, there is no special anti-theft device for metering, and ordinary padlocks are not reliable enough, which may cause electricity theft; 2. The compartments are not clear enough, and there is no special separate compartment for the metering current transformer; 3. The functional compartments cannot be independent of each other. The busbar inlet and outlet room and the metering current transformer room are in the same small room, and the functional units are not independent of each other; 4. The equipment lacks relevant safety measures, so that operators can perform high-risk operations in violation of the "five electrical protection" regulations, that is, it cannot ensure that the cabinet door can only be opened after the grounding knife is closed; and it is still impossible to prevent the grounding knife from opening, that is, the grounding knife is opened, and the door is open, which poses a safety hazard and needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional low-voltage power distribution metering cabinet with a safety interlocking device in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a multifunctional low-voltage power distribution metering cabinet, including a metering cabinet and a cabinet door hinged on the front side of the metering cabinet, the left side plate and the right side plate constituting the cabinet room are respectively fixed on both sides of the metering cabinet, a grounding knife switch is installed in the cabinet room, and an operating handle insertion hole corresponding to the main axis of the grounding knife switch is provided on the right side plate, and its structural characteristics are: a swing rod that can swing back and forth around its hinge point is hinged on the right side plate, and a connecting rod is hinged on the other end of the swing rod, and the other end of the connecting rod is hinged on the right side plate and can swing back and forth around its hinge point, and a connecting rod that can follow its swing and cover and expose the operating handle is fixed on the swing rod. A limit baffle of the handle insertion hole, a return spring with one end fixedly connected thereto and the other end connected to the rocker arm is installed on the right side plate, the return spring is pulled against the two fixed ends and the limit baffle blocks the operating handle insertion hole, a push rod that can move forward and backward is hinged on the rocker arm, the front end of the push rod passes forward and protrudes out of the metering cabinet, a pressing part is provided on the cabinet door, which can press against the push rod when the cabinet door is closed and make the limit baffle separate from the blocking state of the operating handle insertion hole, a female hook is fixed on the inner side of the cabinet door, and a sub-hook is installed on the main shaft, which can rotate with the main shaft when the cabinet door is closed and cooperate with the female hook to implement rotation limit on the cabinet door.

[0006] Two mutually cooperating sub-hook and female hook parts are used to implement interlock switch control on the cabinet door, so that the cabinet door can be opened only after the grounding knife switch is closed and the sub-hook and female hook parts are free from the restriction on the door; only after the cabinet door is closed and the top rod overcomes the pulling force of the reset spring and the limit baffle is free from the limit on the insertion hole of the operating handle, the operating handle can be inserted to open the grounding knife switch. After adopting the above structure, through the control of the mechanical structure, the operator is forced to strictly follow the operating regulations of the grounding switch for the five electrical protections, that is, the cabinet door can be opened only after the grounding knife switch is closed; and after the cabinet door is opened, the grounding knife switch cannot be operated to open, thereby ensuring the personal and equipment safety during production and use.

[0007] Regarding the specific structure of the metering cabinet, the metering cabinet is provided with two partitions that are arranged up and down and divide the cabinet room into three functional rooms. The three functional rooms are the instrument room, the billing and metering room and the incoming circuit breaker room from top to bottom. There are three cabinet doors corresponding to the three functional rooms respectively. The billing and metering room is provided with a partition cylinder that is open to the front and divides the billing and metering room into two independent functional rooms. The partition cylinder is hinged at the open end with a swing door that can be closed and opened. The partition cylinder is the metering electricity meter room. Except for the partition cylinder, the rest of the billing and metering room is the metering current transformer room. After adopting the above structure, the metering cabinet compartments are clear, and each functional compartment is independent of each other, which is convenient for maintenance operations.

[0008] Regarding the specific structure of the cabinet door, the cabinet door is hinged on the metering cabinet through concealed hinges. The installation structure of the concealed hinges, the cabinet door and the metering cabinet is located on one side of the cabinet room, which can prevent the cabinet door from being maliciously opened by prying the hinges. The concealed hinges are installed on the side close to the right side panel, and the pressing part is located on the side close to the concealed hinges.

[0009] In order to facilitate observation of the operating status of electrical instruments in the cabinet room without opening the cabinet door, glass observation windows are provided on the cabinet door and swing door of the billing and metering room.

[0010] In order to improve the safety of the metering cabinet, the three doors are equipped with cam locks, the front side of the billing and metering room is equipped with a padlock nose, and the door of the billing and metering room is equipped with a padlock nose avoidance hole that matches the padlock nose. After adopting the above structure, the anti-theft performance of the metering cabinet can be improved. The billing and metering room uses double protection of cam locks and padlocks, thereby further improving the safety of the metering cabinet.

[0011] Regarding the specific structure of the sub-hook and the female hook, the rear end of the sub-hook is provided with a sleeve that is mounted on the main shaft and fixedly connected to the main shaft, the front end of the sub-hook is provided with a sub-hook head and a sub-hook groove located at the rear side of the sub-hook head, the front end of the female hook is provided with a hook seat that is fixedly connected to the cabinet door, and the rear end of the female hook is provided with a female hook groove corresponding to the sub-hook head and a female hook head corresponding to the sub-hook groove. When the grounding knife switch is in the process of opening, the sub-hook and the female hook cooperate with each other, and the hook heads of the sub-hook and the female hook extend into the corresponding hook grooves, so that the sub-hook and the female hook cannot move forward and backward, that is, the cabinet door cannot be opened at this time; when the grounding knife switch is closed, the main shaft drives the sub-hook to rotate, and it is separated from the cooperation with the female hook. At this time, the female hook can move relative to the sub-hook, that is, the cabinet door can be opened at this time.

[0012] Regarding the connection structure between the push rod and the metering cabinet, a push rod avoidance hole is opened on the front side of the incoming circuit breaker room, the push rod avoidance hole is located on the rear side of the cabinet door, a guide sleeve is inserted in the push rod avoidance hole, and the push rod passes through the guide sleeve and protrudes forward.

[0013] Regarding the installation structure of the reset spring, a spring seat is installed on the metering cabinet, a positioning pin is fixed on the swing arm, and a ring is provided at each end of the reset spring, and the two rings are respectively sleeved on the spring seat and the positioning pin. After adopting the above structure, the reset spring is pulled against the two installation points, and the limit baffle is blocked in front of the insertion hole of the operating handle when the top rod is not subjected to force.

[0014] Regarding the connection structure between the swing rod and the top rod, the swing rod is provided with a slide groove along its length direction, and the top rod is provided with a hinge shaft passing through the slide groove and being able to slide along the length direction of the slide groove. With the above structure, the top rod can be prevented from interfering with the swing rod during the swinging process of the swing rod.

[0015] Due to the application of the above technical solution, the advantages and effects of the present invention are specifically analyzed below.

[0016] In summary, the innovation of this invention is that each functional room is clearly separated and independent. The limit baffle is interlocked with two mutually cooperating male and female hooks, so that the staff must strictly follow the five electrical protection requirements to operate, that is, the cabinet door can only be opened after the grounding knife is closed; the grounding knife switch can only be opened after the cabinet door is closed, thereby ensuring the safety of personnel and equipment during production and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the limit baffle and the male and female hooks when the grounding knife switch is in the closed state;

[0020] Figure 3 It is a schematic diagram of the structure of the limit baffle and the male and female hooks when the grounding knife switch is in the open state;

[0021] Figure 4 It is a schematic diagram of the structure of the male and female hooks when the grounding switch is in the closed state;

[0022] Figure 5 It is a schematic diagram of the structure of the male and female hooks when the grounding knife switch is in the open state;

[0023] Figure 6 It is a structural schematic diagram of the limit baffle and the operating handle insertion hole when the grounding knife switch is in the closed state;

[0024] Figure 7 It is a structural schematic diagram of the limit baffle and the operating handle insertion hole when the grounding knife switch is in the open state;

[0025] Figure 8 It is a front view structural diagram of the metering cabinet;

[0026] Fig. 9 It is a schematic diagram of the left-side structure of the metering cabinet;

[0027] Fig.10 It is a schematic diagram of the right side structure of the metering cabinet;

[0028] Fig.11 This is a schematic diagram of the structure of the operating handle insertion hole and the main shaft.

[0029] In the figure: metering cabinet 1, instrument room 2, billing and metering room 3, incoming circuit breaker room 4, cabinet door 5, concealed hinge 6, spacer cylinder 7, swing door 8, right side plate 9, partition 10, glass observation window 11, slide groove 12, reset spring 13, push rod 14, push rod avoidance hole 15, main shaft 16, guide sleeve 17, female hook 18, spring seat 19, locating pin 20, sub-hook 21, connecting rod 22, rocker arm 23, sleeve 24, sub-hook head 25, sub-hook groove 26, female hook head 27, female hook groove 28, hook seat 29, limit baffle 30, hinge shaft 31, left side plate 32, padlock nose avoidance hole 33, operating handle insertion hole 34, ring 35, cam lock 36, padlock nose 37. DETAILED DESCRIPTION

[0030] Please refer to the accompanying drawings, a multifunctional low-voltage power distribution metering cabinet of the present invention includes a metering cabinet 1 and a cabinet door 5 hinged on the front side of the metering cabinet 1, and the left side plate 32 and the right side plate 9 constituting the cabinet room are respectively fixed on both sides of the metering cabinet 1, and an earthing knife switch is installed in the cabinet room. The right side plate 9 is provided with an operating handle insertion hole 34 corresponding to the main shaft 16 of the earthing knife switch, and a swing rod 23 that can swing back and forth around its hinge point is hinged on the right side plate 9, and a connecting rod 22 is hinged on the other end of the swing rod 23, and the other end of the connecting rod 22 is hinged on the right side plate 9 and can swing back and forth around its hinge point, and a limit baffle 3 that can follow its swing and cover or expose the operating handle insertion hole 34 is fixed on the swing rod 23 0, a return spring 13 is installed on the right side plate 9 with one end fixedly connected thereto and the other end connected to the rocker arm 23, the return spring 13 is pulled against the two fixed ends so that the limit baffle 30 blocks the operating handle insertion hole 34, the rocker arm 23 is hinged with a push rod 14 that can move forward and backward, the front end of the push rod 14 passes forward and protrudes out of the metering cabinet 1, the cabinet door 5 is provided with a pressing portion that can press against the push rod 14 when it is closed and make the limit baffle 30 break away from the blocking state of the operating handle insertion hole 34, a female hook 18 is fixed on the inner side of the cabinet door 5, and a sub-hook 21 is installed on the main shaft 16, which can rotate with the main shaft 16 when the cabinet door 5 is closed and cooperate with the female hook 18 to implement rotation limit on the cabinet door 5.

[0031] Two mutually cooperating sub-hook and female hook members 18 are used to implement interlock switch control on the cabinet door 5, so that the cabinet door 5 can be opened only after the grounding knife switch is closed and the sub-hook and female hook members 18 are free from the restriction on the door; only after the cabinet door 5 is closed and the top rod 14 overcomes the pulling force of the reset spring 13 and the limit baffle 30 is free from the limit on the operating handle insertion hole 34, the operating handle can be inserted to open the grounding knife switch. After adopting the above structure, through the control of the mechanical structure, the operator is forced to strictly follow the operating regulations of the grounding switch for the five electrical protections, that is, the cabinet door 5 can be opened only after the grounding knife switch is closed; and after the cabinet door 5 is opened, the grounding knife switch cannot be operated to open, thereby ensuring the personal and equipment safety during production and use.

[0032] For the specific structure of the metering cabinet 1, refer to the attached Figure 1 , Attachment Figure 8 The metering cabinet 1 is provided with two partitions 10 which are arranged in an upper and lower manner and divide the cabinet room into three functional rooms. The three functional rooms are, from top to bottom, the instrument room 2, the billing and metering room 3 and the incoming circuit breaker room 4. There are three cabinet doors 5 which correspond to the three functional rooms respectively. The billing and metering room 3 is provided with a partition cylinder 7 which is open to the front and divides the billing and metering room 3 into two independent functional rooms. The partition cylinder 7 is hinged with a swing door 8 which can close and open the partition cylinder 7 at the open part. The partition cylinder 7 is the metering watt-hour meter room. Except for the partition cylinder 7, the rest of the billing and metering room 3 is the metering current transformer room. After adopting the above structure, the compartments of the metering cabinet 1 are clear, and each functional compartment is independent of each other, which is convenient for maintenance operations.

[0033] Regarding the specific structure of the cabinet door 5, the cabinet door 5 is hinged on the metering cabinet 1 through a concealed hinge 6. The installation structure of the concealed hinge 6, the cabinet door 5 and the metering cabinet 1 is located on one side of the cabinet room, which can prevent the cabinet door 5 from being maliciously opened by prying the hinge. The concealed hinge 6 is installed on the side close to the right side panel 9, and the pressing part is located on the side close to the concealed hinge 6.

[0034] In order to observe the operating status of the electrical instruments in the cabinet without opening the cabinet door 5, refer to the attached Figure 1 , Attachment Figure 8 A glass observation window 11 is provided on the cabinet door 5 and the swing door 8 of the billing and metering room 3.

[0035] In order to improve the safety of the metering cabinet 1, refer to the attached Figure 8 , refer to the attached Fig. 9 , refer to the attached Fig.10 , the three cabinet doors 5 are all equipped with a cam lock 36, the front side of the billing and metering room 3 is provided with a padlock nose 37, and the cabinet door 5 of the billing and metering room 3 is provided with a padlock nose avoidance hole 33 that matches the padlock nose 37. With the above structure, the anti-theft performance of the metering cabinet 1 can be improved, and the billing and metering room 3 uses the double protection of the cam lock 36 and the padlock, thereby further improving the safety of the metering cabinet 1.

[0036] For the specific structure of the sub-hook 21 and the female hook 18, refer to the attached Figure 4 , refer to the attached Figure 5The rear end of the sub-hook 21 is provided with a sleeve 24 which is sleeved on the main shaft 16 and fixedly connected to the main shaft 16, the front end of the sub-hook 21 is provided with a sub-hook head 25 and a sub-hook groove 26 located at the rear side of the sub-hook head 25, the front end of the female hook 18 is provided with a hook seat 29 fixedly connected to the cabinet door 5, and the rear end of the female hook 18 is provided with a female hook groove 28 corresponding to the sub-hook head 25 and a female hook head 27 corresponding to the sub-hook groove 26. When the grounding knife switch is in the process of opening, the sub-hook 21 and the female hook 18 cooperate with each other, and the hook heads of the sub-hook 21 and the female hook 18 extend into the corresponding hook grooves, so that the sub-hook 21 and the female hook 18 cannot move forward and backward, that is, the cabinet door 5 cannot be opened at this time; when the grounding knife switch is closed, the main shaft 16 drives the sub-hook 21 to rotate, and is separated from the cooperation with the female hook 18, and the female hook 18 can move relative to the sub-hook 21, that is, the cabinet door 5 can be opened at this time.

[0037] Regarding the connection structure between the top rod 14 and the metering cabinet 1, refer to the attached Figure 6 , Attachment Figure 7 A push rod avoidance hole 15 is opened on the front side of the incoming circuit breaker chamber 4, and the push rod avoidance hole 15 is located on the rear side of the cabinet door 5. A guide sleeve 17 is inserted into the push rod avoidance hole 15, and the push rod 14 passes through the guide sleeve 17 and protrudes forward.

[0038] Regarding the installation structure of the return spring 13, refer to the attached Figure 6 , Attachment Figure 7 The metering cabinet 1 is provided with a spring seat 19, a positioning pin 20 is fixed on the swing rod 23, and a ring 35 is provided at each end of the reset spring 13, and the two rings 35 are respectively sleeved on the spring seat 19 and the positioning pin 20. With the above structure, the reset spring 13 is pulled against the two installation points, and the top rod 14 is not subjected to force, and the limit baffle 30 blocks the front side of the operating handle insertion hole 34.

[0039] Regarding the connection structure between the swing rod 23 and the top rod 14, refer to the attached Figure 6 , Attachment Figure 7 The swing rod 23 is provided with a slide groove 12 along its length direction, and the top rod 14 is provided with a hinge shaft 31 that passes through the slide groove 12 and can slide along the length direction of the slide groove 12. After adopting the above structure, the top rod 14 can prevent the swing rod 23 from interfering with the swing rod 23 during the swinging process of the swing rod 23.

[0040] In summary, the present invention is not limited to the above specific embodiments. Those skilled in the art may make several changes and modifications without departing from the spirit and scope of the present invention, and all these changes should fall within the protection scope of the present invention.

Claims

1. A multifunctional low-voltage power distribution metering cabinet, comprising a metering cabinet (1) and a cabinet door (5) hingedly mounted on the front side of the metering cabinet (1), a left side plate (32) and a right side plate (9) constituting a cabinet chamber being fixedly mounted on both sides of the metering cabinet (1), an earthing knife switch being installed in the cabinet chamber, and an operating handle insertion hole (34) corresponding to the main shaft (16) of the earthing knife switch being provided on the right side plate (9), wherein: The right side plate (9) is hinged with a swing rod (23) which can swing forward and backward around its hinge point. The other end of the swing rod (23) is hinged with a connecting rod (22). The other end of the connecting rod (22) is hinged on the right side plate (9) and can swing forward and backward around its hinge point. A limit baffle (30) is fixed on the swing rod (23) and can follow the swing of the swing rod to cover or expose the operating handle insertion hole (34). The right side plate (9) is provided with a return spring (13) with one end fixedly connected to the swing rod and the other end connected to the swing rod (23). The return spring (13) is pulled against the two fixed ends to make the limit baffle (30) cover the right side plate (9). The operating handle insertion hole (34) is blocked, a push rod (14) that can move forward and backward is hinged on the swing rod (23), the front end of the push rod (14) passes forward and protrudes out of the metering cabinet (1), the cabinet door (5) is provided with a pressing portion that can press against the push rod (14) when the cabinet door is closed and make the limit baffle (30) disengage from the blocking state of the operating handle insertion hole (34), a female hook (18) is fixedly installed on the inner side of the cabinet door (5), and a sub-hook (21) is installed on the main shaft (16) and can rotate with the main shaft (16) when the cabinet door (5) is closed and cooperate with the female hook (18) to implement rotation limit on the cabinet door (5); The metering cabinet (1) is provided with two partitions (10) arranged in an upper and lower manner to divide the cabinet room into three functional rooms, the three functional rooms being, from top to bottom, an instrument room (2), a billing and metering room (3) and an incoming circuit breaker room (4), and three cabinet doors (5) are provided, corresponding to the three functional rooms respectively; The grounding knife switch is installed in the incoming circuit breaker chamber (4), the operating handle insertion hole (34) is provided on the right side plate (9) on the right side of the incoming circuit breaker chamber (4), the female hook member (18) is located on the cabinet door (5) of the incoming circuit breaker chamber (4), a push rod avoidance hole (15) is provided on the front side of the incoming circuit breaker chamber (4), a guide sleeve (17) is inserted into the push rod avoidance hole (15), and the push rod (14) passes through the guide sleeve (17) and protrudes forward; The rear end of the sub-hook member (21) is provided with a sleeve (24) sleeved on the main shaft (16) and fixedly connected to the main shaft (16); the front end of the sub-hook member (21) is provided with a sub-hook head (25) and a sub-hook groove (26) located at the rear side of the sub-hook head (25); the front end of the female hook member (18) is provided with a hook member seat (29) fixedly connected to the cabinet door (5); the rear end of the female hook member (18) is provided with a female hook groove (28) corresponding to the sub-hook head (25) and a female hook head (27) corresponding to the sub-hook groove (26); The cabinet door (5) is hingedly mounted on the metering cabinet (1) via a concealed hinge (6); the concealed hinge (6) is mounted on a side close to the right side plate (9); and the pressing portion is located on a side close to the concealed hinge (6).

2. The multifunctional low-voltage power distribution metering cabinet according to claim 1 is characterized in that: The charging and metering chamber (3) is provided with a partition cylinder (7) which is open toward the front and divides the charging and metering chamber (3) into two independent functional chambers. A swing door (8) which can close and open the partition cylinder (7) is hingedly mounted at the opening of the partition cylinder (7).

3. The multifunctional low-voltage power distribution metering cabinet according to claim 2 is characterized in that: The cabinet door (5) and the swing door (8) of the charging and metering room (3) are provided with glass observation windows (11).

4. The multifunctional low-voltage power distribution metering cabinet according to claim 1 is characterized in that: The three cabinet doors (5) are all equipped with a cam lock (36), the front side of the charging and measuring room (3) is provided with a padlock nose (37), and the cabinet door (5) of the charging and measuring room (3) is provided with a padlock nose avoidance hole (33) matched with the padlock nose (37).

5. The multifunctional low-voltage power distribution metering cabinet according to claim 1 is characterized in that: The metering cabinet (1) is provided with a spring seat (19), a positioning pin (20) is fixedly provided on the swing rod (23), and both ends of the return spring (13) each have a ring (35), and the two rings (35) are respectively sleeved on the spring seat (19) and the positioning pin (20).

6. The multifunctional low-voltage power distribution metering cabinet according to claim 1 is characterized in that: The swing rod (23) is provided with a slide groove (12) along its length direction, and the top rod (14) is provided with a hinge shaft (31) that passes through the slide groove (12) and can slide along the length direction of the slide groove (12).

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