A power grid primary and secondary fusion analog-to-digital conversion system and its module plug-in and locking structure

Abstract

The present invention discloses a power grid primary-secondary fusion analog-to-digital conversion system and its module plug-in and locking structure. The locking structure includes: a bracket, a spring, a locking pin, a nut for loading and unloading, a fixing pressure block, and a loading and unloading rod; the bracket is horizontally arranged; the spring is horizontally arranged in the spring limit structure; the locking pin includes a locking pin head, a locking pin body, and a toggle shaft; the loading and unloading nut is arranged below the locking pin; the fixing pressure block, one end of the fixing pressure block is fixed on the module bottom plate, and the other end is buckled on the loading and unloading nut; the loading and unloading rod, one end of which is a loading and unloading screw rod and the other end is an operating rod. Since the analog-to-digital conversion circuit is separated from the FTU, the system is installed near the primary switch and the locking structure of the module plug-in is used for installation and disassembly, which has low cost and is convenient for maintenance and updating.

Description

Technical Field

[0001] The present invention relates to the technical field of primary and secondary integration of power grid, and in particular to a primary and secondary integration analog-to-digital conversion system of a power grid and a module plug-in and a locking structure thereof. Background Art

[0002] See also Figure 1 With the development of national power grid technology, the power grid uses a primary switch 100 including an electromagnetic sensor 120 and other primary switch function modules 110 for controlling the main power line, and a secondary distribution switch monitoring terminal 200 including an analog-to-digital conversion circuit 413 and other secondary distribution switch monitoring terminal modules 210 for monitoring, measuring and controlling the operation of the primary switch 100. When a fault occurs in the power grid line, the secondary distribution switch monitoring terminal 200 can timely monitor, measure and control the operation of the primary switch 100. The signal fed back by the primary switch 100 is a voltage or current signal, which is collected by PT (voltage transformer) and CT (current transformer) respectively. The collected information is fed back to the secondary distribution switch monitoring terminal 200, namely FTU (secondary distribution switch monitoring terminal), and FTU then exchanges information with the main station (not shown in the figure). The main station sends corresponding commands according to the situation to adjust and control the primary switch 100, so as to realize the functions of fault location, fault isolation and rapid power supply restoration in non-fault areas. The CT and PT commonly used now adopt a separate electromagnetic structure to collect the voltage and current signals of the line as analog quantities. The FTU is directly connected to the switch, and the analog signal is processed by the FTU. According to the specific situation of the signal, the switch is controlled accordingly. The signal data amplitude of the electromagnetic structure CT and PT is large, and can be transmitted over a long distance (such as 15 meters) without obvious attenuation. In the prior art, two combined cables of more than ten meters in length are required between the FTU and the switch, which is costly; because the analog-to-digital conversion equipment is installed in the FTU, if the analog-to-digital conversion equipment is maintained or updated, the entire FTU can only be dismantled, and the FTU is generally installed on a utility pole more than ten meters high, which is inconvenient to operate. Summary of the invention

[0003] The main purpose of the present invention is to provide a power grid primary-secondary fusion analog-to-digital conversion system and its module plug-in and locking structure, in view of the problems of the prior art, which has low cost and is easy to maintain and update.

[0004] The technical solution adopted by the present invention is as follows:

[0005] In a first aspect, a locking structure of a module plug-in of a power grid primary-secondary fusion analog-to-digital conversion system is provided, which is applied to the power grid primary-secondary fusion analog-to-digital conversion system, the power grid primary-secondary fusion analog-to-digital conversion system includes a module plug-in and a module storage bin, the module plug-in includes a module and a locking structure, the module includes a module housing, a module connector arranged at an opening at the upper end of the module housing, an analog-to-digital conversion circuit arranged in the module and electrically connected to the module connector, the module storage bin includes a module storage bin body and a locking platform, the module storage bin body includes a storage bin housing, a storage bin connector module, a receiving portion and a first opening connected to the receiving portion, The module storage bin is vertically arranged, the first opening is downward, the module plug-in can be inserted into the receiving portion or removed from the receiving portion from the first opening, the locking structure is arranged in the module, a first through hole is arranged on one side of the module shell, and a second through hole for loading and unloading is arranged on the bottom of the module shell, the locking platform is arranged on one side of the module storage bin body, one end of the locking platform close to the first opening of the module storage bin body is a locking platform inclined surface, and the other end is a locking platform plane, when the module plug-in is inserted into the receiving portion, the locking structure cooperates with the locking platform to lock the module plug-in in the module storage bin, and the locking structure includes:

[0006] A bracket, wherein the bracket is arranged horizontally, one side of the bracket is fixed on the inner wall of the module housing, and the other side is provided with a spring support platform, the bracket is provided with a spring limiting structure along the spring expansion and contraction direction, the first slide groove and the second slide groove are respectively provided on both sides of the bracket along the spring expansion and contraction direction, and a protruding stop pin is provided on one side of the bracket;

[0007] A spring is horizontally arranged in a spring limiting structure;

[0008] The lock pin comprises a lock pin head, a lock pin body and a toggle shaft, wherein the lock pin body is provided with a first rear end face of the lock pin in the middle of the opposite side of the lock pin head, one end of the spring abuts against the spring support platform, and the other end abuts against the first rear end face of the lock pin, the lock pin head is provided at one end of the lock pin body, and the two sides of the lock pin body are respectively provided with a first lock pin wing span and a second lock pin wing span, the first lock pin wing span and the second lock pin wing span are respectively placed in the first slide groove and the second slide groove, and can be moved along the first slide groove and the second slide groove, and the lock pin head is automatically moved by the spring. When in the unlocked state, the first through hole can be extended out of the lock pin head. One end of the lock pin head exposed outside the first through hole is an inclined surface of the lock pin head, and the other end is a plane of the lock pin head. The toggle shaft is arranged on one side of the axis of the lock pin body and protrudes downward. The lock pin body is provided with a second rear end face of the lock pin at the opposite side of the lock pin head, deviating from the central axis. The stop pin is arranged opposite to the second rear end face of the lock pin. When the stop pin is used to prevent the lock pin head from retracting into the first through hole excessively, when the second rear end face of the lock pin hits the stop pin, the lock pin head has retracted into the first through hole.

[0009] A nut for loading and unloading is arranged below the locking pin, a thread is arranged on the inner side of the nut for loading and unloading, one end of the thread of the nut for loading and unloading faces the second through hole, and the other end is provided with a first toggle surface and a second toggle surface which are arranged radially, oppositely and vertically on the nut for loading and unloading, the first toggle surface is close to one side of the spring support platform, the second toggle surface is close to one side of the locking pin head, and the toggle shaft is located between the first toggle surface and the second toggle surface;

[0010] A fixing pressure block, one end of which is fixed to the module bottom plate, and the other end is buckled on the loading and unloading nut, and the loading and unloading nut is arranged between the fixing pressure block and the module bottom plate and can rotate freely;

[0011] The loading and unloading rod has a loading and unloading screw rod at one end and an operating rod at the other end. The outer side of the loading and unloading screw rod is provided with threads, and the loading and unloading screw rod can be screwed into the loading and unloading nut.

[0012] Optionally, the inclined surface of the locking pin head is chamfered, circular arc or inclined surface.

[0013] Optionally, the spring limiting structure is composed of a first spring side baffle, a second spring side baffle arranged on both sides of the spring on the bracket, and a spring top baffle arranged on the upper end of the spring on the bracket.

[0014] Optionally, a first slot and a second slot are provided on both sides of the rear end of the bracket, and when the spring is compressed, the first side baffle and the second side baffle of the spring can be inserted into the first slot and the second slot respectively.

[0015] Optionally, a spring inner support is provided on the first rear end surface of the locking pin, and one end of the spring is sleeved on the spring inner support.

[0016] Optionally, the first shifting surface and the second shifting surface are opposite side end surfaces of two sector-shaped blocks arranged at one end of the loading and unloading nut.

[0017] Optionally, the first slide groove and the second slide groove are open grooves facing the inner side of the bracket, and the upper ends are respectively provided with the first slide groove upper side and the second slide groove upper side, and the sides are respectively provided with the first slide groove side wall and the second slide groove side wall.

[0018] Optionally, the bracket is provided with a first mounting ear and a second mounting ear on both sides of the end surface of one end close to the locking pin head, and the module housing is provided with a first fixing hole and a second fixing hole. The first mounting ear and the second mounting ear can be fixed to the side of the module housing by screws and the first fixing hole and the second fixing hole.

[0019] Optionally, the cross-section of the loading and unloading nut is in the shape of a "convex" character, the fixed pressure block is buckled on the "convex"-shaped step, and the loading and unloading nut can rotate freely.

[0020] In a second aspect, a module plug-in of a power grid primary-secondary fusion analog-to-digital conversion system is provided, wherein the power grid primary-secondary fusion analog-to-digital conversion system further comprises a module storage bin, and the module plug-in comprises:

[0021] module, which can be detachably inserted into the module storage compartment, and

[0022] In a first aspect, a locking structure of a module plug-in of a power grid primary-secondary fusion analog-to-digital conversion system is provided, wherein the locking structure is arranged in the module.

[0023] Optionally, the module connector is a plug, and module guide heads are provided around the module connector plug and on the module housing for plugging and positioning with the storage bin connector module.

[0024] Optionally, the cross-section of the module guide head is rectangular, and the upper end of the module guide head is an inwardly closing module guide head slope.

[0025] Optionally, seals are provided around the module guide head.

[0026] In a third aspect, a power grid primary and secondary fusion analog-to-digital conversion system is provided, comprising:

[0027] A module storage bin, the module storage bin comprising a module storage bin body and a locking platform, the inner side of the module storage bin body is provided with a locking platform, the lower end of the locking platform is provided with a locking platform guide inclined surface, and the upper end is provided with a locking platform plane; and

[0028] The module plug-in of the power grid primary and secondary integrated analog-to-digital conversion system described in the second aspect.

[0029] Preferably, the module storage bin body is provided with four module mounting rails, and the module plug-in is inserted or pulled out along the module mounting rails.

[0030] Preferably, the storage bin housing is provided with a signal input connector and a signal output connector which are electrically connected to the storage bin connector respectively.

[0031] Preferably, the storage bin shell is provided with a wire hole, and the storage bin connector wire passes through the wire hole.

[0032] It can be seen from the above technical scheme that the present invention has the following advantages: since the system separates the analog-to-digital conversion circuit from the FTU, it is installed near the primary switch and uses the locking structure of the module plug-in for installation and disassembly, which is low in cost and easy to maintain and update. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments and the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a circuit block diagram of the primary and secondary systems of the power grid of the prior art of the present invention;

[0035] Figure 2 This is a circuit block diagram of a primary and secondary fusion system of a power grid according to an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of a power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0037] Figure 4 It is a plan view of a power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0038] Figure 5 It is a schematic diagram of the module plug-in structure of a power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0039] Figure 6 It is a cross-sectional view of a module plug-in of a power grid primary-secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of the flip placement structure of the locking structure of the power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0041] Figure 8 It is a schematic diagram of the normal placement structure of the locking structure of the power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0042] Fig. 9 It is a schematic diagram of a bracket flip placement structure of a locking structure of a power grid primary-secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0043] Fig.10 It is a schematic diagram of a normal placement structure of a bracket of a locking structure of a power grid primary-secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0044] Fig.11 It is a schematic diagram of a lock pin flip placement structure of a locking structure of a power grid primary-secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0045] Fig.12 It is a schematic diagram of the normal placement structure of the lock pin of the locking structure of the power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0046] Fig.13 It is a schematic diagram of the structure of the nut for loading and unloading and the pressing block for fixing of the locking structure of the primary and secondary fusion analog-to-digital conversion system of the power grid according to an embodiment of the present invention;

[0047] Fig.14 It is a schematic diagram of the loading and unloading rod structure of the power grid primary and secondary fusion analog-to-digital conversion system according to an embodiment of the present invention;

[0048] Fig.15 It is a schematic diagram of the structure of a primary-secondary fusion analog-to-digital conversion system for a power grid according to another embodiment of the present invention;

[0049] Fig.16 It is a cross-sectional view of a power grid primary-secondary fusion analog-to-digital conversion system according to another embodiment of the present invention.

[0050] Reference numerals:

[0051] 100, primary switch; 110, primary switch other functional modules; 120, electromagnetic sensor; 130, electronic sensor 130;

[0052] 200. Secondary power distribution switch monitoring terminal; 210. Other modules of the secondary power distribution switch monitoring terminal;

[0053] 400, module plug-in; 410, module; 411, module housing; 4111, first through hole; 4112, second through hole; 4113, module housing bottom plate; 4114, first fixing hole; 4115, second fixing hole; 4116, module guide head; 41161, module guide head inclined surface; 4117, seal; 412, module connector; 413, analog-to-digital conversion circuit; 420: locking structure; 421, bracket; 4211, spring support platform; 4212, first slide groove; 42121, upper side of first slide groove; 42131, side wall of first slide groove; 4213, second slide groove; 42122, upper side of second slide groove; 42132, side wall of second slide groove; 4214, stop pin; 4215, spring limiting structure; 42151, first spring side baffle; 421 52, second spring side baffle; 42153, spring top baffle; 4216, first slot; 4217, second slot; 4218, first mounting ear; 4219, second mounting ear; 422, spring; 423, lock pin; 4231, lock pin head; 42311, lock pin head inclined surface; 42312, lock pin head plane; 4232, lock pin body; 42321, lock pin first rear end 42322, first lock pin wingspan; 42323, second lock pin wingspan; 42324, second rear end face of lock pin; 42325, inner support of spring; 4233, toggle shaft; 424, nut for loading and unloading; 4241, first toggle face; 4242, second toggle face; 425, fixing block; 426, loading and unloading rod; 4261, screw for loading and unloading rod; 4262, operating rod;

[0054] 500, module storage bin; 510, module storage bin body; 511, storage bin shell; 5111, storage bin shell top plate; 512, storage bin connector module; 5121, storage bin connector module shell; 51211, second opening; 51212, inner guide angle; 5122, storage bin connector; 513, accommodating portion; 514, first opening; 515, module mounting rail; 516, signal input connector; 517, signal output connector; 518, wire hole; 520, locking platform; 521, locking platform inclined surface; 522, locking platform plane. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0056] The terms "first", "second", "third", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0057] The solutions of the present invention are described in detail below through specific embodiments.

[0058] See also Figure 1-4 The electromagnetic sensors 120 currently in use are relatively expensive and have gradually transitioned to electronic sensors 130 (which can integrate current transformers with voltage transformers), which has brought about new technical upgrade requirements. The use of electronic sensors 130 has also put forward new upgrade requirements for the secondary distribution switch monitoring terminal 200 (FTU). Based on the above application scenarios, in conjunction with the functions of the electronic sensor 130, some functions of the FTU (collecting analog data and converting it into digital data, etc.) are separated to make an analog-to-digital conversion circuit 413 (ADMU module) (installed in the module plug-in 400) that is easy to upgrade and maintain. The maintenance of the analog-to-digital conversion circuit 413 adopts a live replaceable design, which is replaced by an insulated loading and unloading rod 426 (see Fig.14 ) The analog-to-digital conversion circuit 413 can be installed and removed at any time. The analog-to-digital conversion circuit 413 can be upgraded and debugged before being replaced. In this way, it can be prefabricated in the factory and replaced on site. Some functions of the secondary distribution switch monitoring terminal 200 (FTU) are separated to make a module plug-in 400 that is easy to replace and includes the analog-to-digital conversion circuit 413. The module plug-in 400 is loaded into the module storage compartment 500. If there is an upgrade requirement, the module plug-in 400 can be replaced with power on, which greatly improves the maintainability of the equipment. The distance between the module plug-in 400 and the electronic sensor 130 is very close, and the distortion of the collected analog signal is small; the distance between the module plug-in 400 and the secondary distribution switch monitoring terminal 200 is relatively far, and digital communication is used, and only a smaller cable is needed for communication, which greatly saves the cost of materials such as cables and improves the overall delivery speed of the product. There are two installation methods in actual application: one is to integrate the module storage bin 500 with the primary switch control cabinet 100, which is suitable for new projects; the other is to separate the module storage bin 500 and the primary switch control cabinet 100, which is suitable for the transformation of the original equipment.

[0059] See also Figure 2-5The power grid primary and secondary integrated analog-to-digital conversion system of the embodiment of the present invention is used in the primary switch control device 110. The electronic sensor 130 system is used to separate the analog-to-digital conversion circuit 413 from the secondary distribution switch monitoring terminal 200 (FTU) to make a live detachable module, including a module plug-in 400 and a module storage compartment 500. The module plug-in 400 includes a module 410 and a locking structure 420. The module 410 includes a module housing 411, a module connector 412 arranged at an upper opening of the module housing 411, and a module connector 412 arranged in the module 410 and electrically connected to the module connector 412. The analog-to-digital conversion circuit 413 is connected, wherein the module connector 412 and the storage compartment connector 5122 are pluggable, the signal input connector 516 and the signal output connector 517 are connected to the storage compartment connector 5122, the analog-to-digital conversion circuit 413 is used to receive the analog signal from the electronic sensor 130 through the signal input connector 516, and convert it into a digital signal and transmit it to the secondary distribution switch monitoring terminal 200 through the signal output connector 517, the module storage compartment 500 includes a module storage compartment body 510 and a locking platform 520, and the module storage compartment body 510 includes a storage compartment The module storage compartment 500 is vertically arranged with the first opening 514 facing downward. The module plug-in 400 is slightly smaller than the cross-section of the first opening 514 and can be rectangular, square, circular, etc. The module plug-in 400 can be inserted into the receiving portion 513 or removed from the receiving portion 513 from the first opening 514. The locking structure 420 is arranged in the module 410 and can be fixed to one side of the module housing 411 by screws. A first through hole 4111 is provided on one side of the module housing 411, and a locking pin 420 is provided on the first through hole 4111. The head inclined surface 42311 faces upward, and the locking pin head 4231 can extend or retract from the first through hole 4111. The bottom of the module housing 411 is provided with a second through hole 4112 for loading and unloading. The locking platform 520 is provided on one side of the module storage bin body 510. One end of the locking platform 520 close to the first opening 514 of the module storage bin body 510 is a locking platform inclined surface 521, and the other end is a locking platform plane 522. When the module plug-in 400 is inserted into the receiving portion 513, the locking structure 420 cooperates with the locking platform 520 to lock the module plug-in 400 in the module storage bin 500, which is convenient for installation and disassembly. The storage bin connector module 512 is provided on the storage bin housing top plate 5111, and includes a storage bin connector module housing 5121 with a second opening 51211 facing downward and a storage bin connector 5122 provided at the second opening 51211. The second opening 51211 of the storage compartment connector module housing is provided with an inner guide angle 51212, which is used to cooperate with the module guide head 4114 for positioning when plugging with the module connector 412. The storage compartment connector 5122 can be a socket. The module storage compartment body 510 is provided with four module mounting rails 515, and the module plug-in 400 is inserted or removed along the module mounting rails 515.The storage bin housing 511 is provided with a signal input connector 516 and a signal output connector 517 which are electrically connected to the storage bin connector 5122 respectively.

[0060] The module connector 412 may be a plug, and a module guide head 4116 may be provided around the module connector 412 plug and on the module housing for plugging and positioning with the storage bin connector module 512. The module guide head 4116 may have a rectangular cross section, and an inwardly closing module guide head inclined surface 41161 may be provided on the upper end of the module guide head 4116. When the second opening 51211 of the module storage bin 500 is vertically arranged downward, when the module connector 412 plug of the module plug-in 400 is inserted upward from the second opening 51211, the module guide head inclined surface 41161 cooperates with the inner guide angle 51212 of the storage bin connector module housing 5121, and the inner guide angle 51212 is wide at the bottom and narrow at the top, so as to facilitate the plugging of the module connector 412 and the storage bin connector 5122. A sealing member 4117 is provided around the module guide head 4116, and the sealing member 4117 may be a rubber ring or the like.

[0061] Please combine Figures 6 to 13The locking structure of the embodiment of the present invention includes: a bracket 421, a locking pin 423, a nut 424 for loading and unloading, a fixing pressure block 425, and a loading and unloading rod 426. The bracket 421 is horizontally arranged, one side of which is fixed on the inner wall of the module housing 411, and the other side is provided with a spring support platform 4211. The first mounting ear 4218 and the second mounting ear 4219 are respectively provided on both sides of the end surface of one end of the bracket 421 close to the locking pin head 4231. The module housing 411 is provided with a first fixing hole 4114 and a second fixing hole 4115. The first mounting ear 4218 and the second mounting ear 4219 can be fixed to the side of the module housing 411 by screws and the first fixing hole 4114 and the second fixing hole 4115. The bracket 421 is provided with a spring limiting structure 4215 along the extension and contraction direction of the spring 422, and the first slide groove 4212 and the second slide groove 4213 are respectively provided on both sides of the bracket 421 along the extension and contraction direction of the spring 422, and a protruding stop pin 4214 is provided on one side of the bracket 421; the spring 422 is horizontally arranged in the spring limiting structure 4215; the spring limiting structure 4215 is composed of a first spring side baffle 42151 and a second spring side baffle 42152 arranged on both sides of the spring 422 on the bracket and a spring top baffle 42153 arranged on the upper end of the spring 422 on the bracket, and the spring 422 is limited therein. The bracket 421 is provided with a first slot 4216 and a second slot 4217 on both sides of the rear end. When the lock pin 423 is assembled, the spring first side baffle 42151 and the second side baffle 42152 can be inserted into the first slot 4216 and the second slot 4217 respectively, so that the first lock pin wing span 42322 and the second lock pin wing span 42323 can be placed into the first slide groove 4212 and the second slide groove 4213 respectively. A spring inner support 42325 is provided on the first rear end face 42321 of the lock pin for fixing one end of the spring 422. One end of the spring 422 is sleeved on the spring inner support 42325.The lock pin 423 includes a lock pin head 4231, a lock pin body 4232, and a toggle shaft 4233. The lock pin body 4232 is provided with a lock pin first rear end face 42321 in the middle of the opposite side of the lock pin head 4231. One end of the spring 422 abuts against the spring support platform 4211, and the other end abuts against the lock pin first rear end face 42321. The lock pin head 4231 is provided at one end of the lock pin body 4232. The lock pin body 4232 is provided with a first lock pin wingspan 42322 and a second lock pin wingspan 42323 on both sides. The first lock pin wingspan 42322 and the second lock pin wingspan 42323 are respectively placed in the first slide groove 4212 and the second slide groove 4213, and can move along the first slide groove 4212 and the second slide groove 4213. The groove 4213 is an open groove facing the inner side of the bracket, and the upper end is respectively provided with a first slide groove upper side 42121 and a second slide groove upper side 42122, and the side is respectively provided with a first slide groove side wall 42131 and a second slide groove side wall 42132. The locking pin head 4231 can extend out of the first through hole 4111 when the spring 422 is in a free state. The end of the locking pin head 4231 exposed outside the first through hole 4111 is a locking pin head inclined surface 42311 facing upward, and the other end is a locking pin head plane 42312. The inclined surface of the locking pin head 4231 is chamfered or arc or inclined. The toggle shaft 4233 is arranged on one side of the axis of the locking pin body 4232 and protrudes downward. The locking pin body 4232 is provided with a locking pin second rear end surface 4231 on the opposite side of the locking pin head 4231, deviating from the central axis. 324, the stop pin 4214 is arranged opposite to the second rear end 42324 of the locking pin, the stop pin 4214 is used to prevent the locking pin head 4231 from excessively retracting into the first through hole 4111, when the second rear end face 42324 of the locking pin hits the stop pin 4214, the locking pin head 4231 has retracted into the first through hole 4111, the stop pin 4214 is to ensure that the locking pin head 4231 retracts into the first through hole 4111, but does not retract too much; the loading and unloading nut 424 is arranged below the locking pin 423, the inner side of the loading and unloading nut 424 is provided with a thread, one end of the thread of the loading and unloading nut 424 faces the second through hole 4112, and the other end is provided with a first toggle surface 4241 and a second toggle surface 4241 which are radially opposite to and vertically arranged on the loading and unloading nut 424 The first toggle surface 4241 is close to the spring support platform 4241, and the second toggle surface 4242 is close to the lock pin head 4231. The toggle shaft 4233 is located between the first toggle surface 4241 and the second toggle surface 4242. The first toggle surface 4241 and the second toggle surface 4242 are the opposite side end surfaces of two fan-shaped blocks arranged at one end of the loading and unloading nut 424; the fixed pressing block 425, one end of the fixed pressing block is fixed to the module bottom plate, and the other end is buckled on the loading and unloading nut. The loading and unloading nut is arranged between the fixed pressing block and the module bottom plate and can rotate freely. The cross-section of the loading and unloading nut 424 is a "convex" shape, and the fixed pressing block 425 is buckled on the "convex" shaped step; see; Fig.14The loading and unloading rod 426 has a loading and unloading screw rod 4261 at one end and an operating rod 4262 at the other end. The loading and unloading screw rod 4261 is provided with a thread on the outside, and the loading and unloading screw rod 4261 can be screwed into the loading and unloading nut 424.

[0062] See also Figure 15 to Figure 16 In another embodiment, the signal input connector 516 and the signal output connector 517 are replaced by direct wiring, and a wire hole 518 is provided in the storage bin shell 511. The input and output wires pass through the wire hole 518, one end of which is connected to the storage bin connector module 512, and the other end is respectively connected to the electronic sensor 130 and the secondary distribution switch monitoring device 210.

[0063] The process of loading and unloading the power grid primary and secondary integrated analog-to-digital conversion system module plug-in 400 from the module storage bin 500 is as follows:

[0064] 1. Screw the loading and unloading screw 4261 at the end of the loading and unloading rod 426 into the loading and unloading nut 424 (for example, right-hand rotation);

[0065] Note: When the loading and unloading rod 426 is screwed into the loading and unloading nut 424, the loading and unloading rod 426 will drive the loading and unloading nut 424 to rotate (friction force), and the second toggle surface 4242 acts on the toggle shaft 4233, driving the locking pin 423 to move as a whole (the locking pin head 4231 is retracted into the module housing 411), and the locking pin 423 will compress the spring 422 when moving; when the second rear end surface 42324 of the locking pin hits the stop pin 4214, the locking pin 423 stops moving, and the loading and unloading rod 426 continues to be screwed into place, and at this time the locking pin head 4231 is retracted into the module housing 411; after the loading and unloading rod 426 is screwed into place, due to the rebound force of the spring 422, the locking pin 423 is driven to extend out of the module housing 411 again;

[0066] 2. Lift the loading and unloading rod 426 and the module plug-in 400 and align them with the first opening 514 of the bottom 500 of the module storage bin (there is a direction requirement, the locking pin head 4231 faces the locking platform 520); after pushing the module plug-in 400 into place, the locking pin 423 will be locked on the locking platform 520.

[0067] When the module plug-in 400 is pushed in, when the locking pin head 4231 is in contact with the locking platform inclined surface 521, the locking platform inclined surface 521 will squeeze the locking pin head 4231 back and then compress the spring 422. When the module plug-in 400 is pushed in beyond the locking platform 520, the locking pin 423 will be ejected out of the module housing 411 under the action of the rebound force of the spring 422, and the module is securely locked.

[0068] When the loading and unloading rod 426 is to be removed, the loading and unloading rod 426 is first screwed out of the loading and unloading nut 424 (in the opposite direction of screwing in), and the loading and unloading nut 424 is then rotated. When the first shifting surface 4241 abuts against the shifting shaft 4233, the loading and unloading nut 424 will no longer rotate, and the loading and unloading nut 424 can be screwed out normally. During the process of screwing out the loading and unloading nut 424, the locking pin 423 is always in a fully extended state (locked and reliable state), until the loading and unloading rod 426 is completely screwed out, that is, the loading and unloading rod 426 is removed.

[0069] 3. When taking the module plug-in 400 out of the module storage compartment 500, lift the loading and unloading rod 426 to align it with the loading and unloading nut 424 at the bottom of the module plug-in 400, screw in the loading and unloading rod 426 to drive the loading and unloading nut 424 to rotate, and when the second driving surface 4242 of the loading and unloading nut 424 drives the driving shaft 4233 to move, when the second rear end surface 42324 of the locking pin hits the stop pin 4214, the locking pin head 4231 has retracted into the module housing 411, and here the loading and unloading rod 426 is pulled downward to complete the unlocking.

[0070] The technical solution of the present invention is described in detail above through specific embodiments. In the above embodiments, the description of each embodiment has its own emphasis. For the part that is not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0071] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. A person skilled in the art may modify the technical solutions described in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locking structure, applied to a primary-secondary fusion analog-to-digital conversion system of a power grid, characterized in that: The power grid primary and secondary fusion analog-to-digital conversion system includes a module plug-in and a module storage bin, the module plug-in includes a module and a locking structure, the module includes a module housing, a module connector arranged at an opening at the upper end of the module housing, and an analog-to-digital conversion circuit arranged in the module and electrically connected to the module connector, the module storage bin includes a module storage bin body and a locking platform, the module storage bin body includes a storage bin housing, a storage bin connector module, a storage portion and a first opening connected to the storage portion, the module storage bin is vertically arranged, the first opening faces downward, the module plug-in is slightly smaller in cross section than the first opening, and the cross section The module plug-in is rectangular, square or circular, and the module plug-in can be inserted into the receiving portion from the first opening or removed from the receiving portion. The locking structure is arranged in the module, a first through hole is arranged on one side of the module shell, and a second through hole for loading and unloading is arranged on the bottom of the module shell. The locking platform is arranged on one side of the module storage bin body, and one end of the locking platform close to the first opening of the module storage bin body is a locking platform inclined surface, and the other end is a locking platform plane. When the module plug-in is inserted into the receiving portion, the locking structure cooperates with the locking platform to lock the module plug-in in the module storage bin, and the locking structure includes: A bracket, wherein the bracket is arranged horizontally, one side of the bracket is fixed on the inner wall of the module housing, and the other side is provided with a spring support platform, the bracket is provided with a spring limiting structure along the spring expansion and contraction direction, the first slide groove and the second slide groove are respectively provided on both sides of the bracket along the spring expansion and contraction direction, and a protruding stop pin is provided on one side of the bracket; A spring is horizontally arranged in a spring limiting structure; The lock pin comprises a lock pin head, a lock pin body and a toggle shaft, wherein the lock pin body is provided with a first rear end face of the lock pin in the middle of the opposite side of the lock pin head, one end of the spring abuts against the spring support platform, and the other end abuts against the first rear end face of the lock pin, the lock pin head is provided at one end of the lock pin body, and the two sides of the lock pin body are respectively provided with a first lock pin wing span and a second lock pin wing span, the first lock pin wing span and the second lock pin wing span are respectively placed in the first slide groove and the second slide groove, and can be moved along the first slide groove and the second slide groove, and the lock pin head is automatically moved by the spring. When in the unlocked state, the first through hole can be extended out of the lock pin head. One end of the lock pin head exposed outside the first through hole is an inclined surface of the lock pin head, and the other end is a plane of the lock pin head. The toggle shaft is arranged on one side of the axis of the lock pin body and protrudes downward. The lock pin body is provided with a second rear end face of the lock pin at the opposite side of the lock pin head, deviating from the central axis. The stop pin is arranged opposite to the second rear end face of the lock pin. When the stop pin is used to prevent the lock pin head from retracting into the first through hole excessively, when the second rear end face of the lock pin hits the stop pin, the lock pin head has retracted into the first through hole. A nut for loading and unloading is arranged below the locking pin, a thread is arranged on the inner side of the nut for loading and unloading, one end of the thread of the nut for loading and unloading faces the second through hole, and the other end is provided with a first toggle surface and a second toggle surface which are arranged radially, oppositely and vertically on the nut for loading and unloading, the first toggle surface is close to one side of the spring support platform, the second toggle surface is close to one side of the locking pin head, and the toggle shaft is located between the first toggle surface and the second toggle surface; A fixing pressure block, one end of which is fixed to the module bottom plate, and the other end is buckled on the loading and unloading nut, and the loading and unloading nut is arranged between the fixing pressure block and the module bottom plate and can rotate freely; The loading and unloading rod has a loading and unloading screw rod at one end and an operating rod at the other end. The outer side of the loading and unloading screw rod is provided with threads, and the loading and unloading screw rod can be screwed into the loading and unloading nut.

2. The locking structure according to claim 1, characterized in that: The inclined surface of the locking pin head is chamfered, circular or inclined.

3. The locking structure according to claim 1, characterized in that: The spring limiting structure includes a first spring side baffle, a second spring side baffle and a spring top baffle. The first spring side baffle and the second spring side baffle are arranged on both sides of the spring and extend along the expansion and contraction direction of the spring. The spring top baffle is arranged at the upper end of the spring, perpendicular to the expansion and contraction direction of the spring.

4. The locking structure according to claim 3, characterized in that: The bracket is provided with a first slot and a second slot on both sides of the rear end. When the locking pin is assembled, the first side baffle and the second side baffle of the spring can be inserted into the first slot and the second slot respectively, so that the first lock pin wingspan and the second lock pin wingspan can be placed in the first slide groove and the second slide groove respectively.

5. The locking structure according to claim 1, characterized in that: A spring inner support is provided on the first rear end surface of the lock pin, and one end of the spring is sleeved on the spring inner support.

6. The locking structure according to claim 1, characterized in that: The first shifting surface and the second shifting surface are side end surfaces opposite to each other of two sector blocks arranged at one end of the nut for assembly and disassembly.

7. The locking structure according to claim 1, characterized in that: The first slide groove and the second slide groove are open grooves facing the inner side of the bracket, and the upper ends are respectively provided with the first slide groove upper side and the second slide groove upper side, and the side surfaces are respectively provided with the first slide groove side wall and the second slide groove side wall.

8. The locking structure according to claim 1, characterized in that: The bracket is provided with a first mounting ear and a second mounting ear on both sides of the end surface of one end close to the locking pin head, and the module housing is provided with a first fixing hole and a second fixing hole. The first mounting ear and the second mounting ear can be fixed to the side of the module housing by screws and the first fixing hole and the second fixing hole.

9. The locking structure according to claim 1, characterized in that: The cross section of the nut for loading and unloading is in the shape of a "convex" character, the fixed pressure block is buckled on the "convex" character step, and the nut for loading and unloading can rotate freely.

10. A module plug-in for a primary-secondary fusion analog-to-digital conversion system of a power grid, characterized in that: The power grid primary-secondary fusion analog-to-digital conversion system also includes a module storage bin, and the module plug-in includes: a module that can be detachably plugged into the module storage bin, and a locking structure as described in any one of claims 1 to 9, wherein the locking structure is arranged in the module.

11. The module plug-in of the power grid primary and secondary fusion analog-to-digital conversion system according to claim 10, characterized in that: The module connector is a plug, and module guide heads are provided around the module connector plug and on the module housing for plugging and positioning with the storage bin connector module.

12. The module plug-in of the power grid primary-secondary fusion analog-to-digital conversion system according to claim 11, characterized in that: The cross section of the module guide head is rectangular, and the upper end of the module guide head is an inwardly closing module guide head inclined surface.

13. The module plug-in of the power grid primary-secondary fusion analog-to-digital conversion system according to claim 11, characterized in that: The module guide head is provided with sealing parts around it.

14. A primary-secondary fusion analog-to-digital conversion system for a power grid, characterized in that: The power grid primary and secondary integrated analog-to-digital conversion system comprises: a module storage bin, the module storage bin comprising a module storage bin body and a locking platform, the inner side of the module storage bin body is provided with a locking platform, the lower end of the locking platform is provided with a locking platform guide slope, and the upper end is provided with a locking platform plane; and a module plug-in of the power grid primary and secondary integrated analog-to-digital conversion system as described in claim 10.

15. The power grid primary and secondary fusion analog-to-digital conversion system according to claim 14, characterized in that: The storage bin connector module is arranged on the top plate of the storage bin shell, and comprises a storage bin connector module shell with a second opening downwardly provided and a storage bin connector arranged at the second opening.

16. The power grid primary and secondary fusion analog-to-digital conversion system according to claim 15, characterized in that: An inner guide angle is provided at the second opening of the module housing of the storage bin connector, which is used to cooperate with the module guide head for positioning when plugging with the module connector. The storage bin connector is a socket.

17. The power grid primary and secondary fusion analog-to-digital conversion system according to claim 14, characterized in that: The module storage bin body is provided with four module mounting rails, and the module plug-in is inserted or pulled out along the module mounting rails.

18. The power grid primary and secondary fusion analog-to-digital conversion system according to claim 14, characterized in that: The storage bin housing is provided with a signal input connector and a signal output connector which are electrically connected to the storage bin connector respectively.

19. The power grid primary and secondary fusion analog-to-digital conversion system according to claim 14, characterized in that: The storage bin shell is provided with a wire hole, and the storage bin connector wire passes through the wire hole.

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