CN219393964U - Adapter for secondary equipment transformation - Google Patents

Abstract

The utility model relates to an adapter for secondary equipment reconstruction, which comprises: the two adapters comprise a shell, a first connecting end and a second connecting end are arranged on the outer wall of the shell, a plurality of terminals are arranged on the first connecting end and the second connecting end, and the terminals on the first connecting end and the terminals on the second connecting end in the shell are correspondingly connected; the first connecting ends of the two adapter connectors are respectively connected with the secondary equipment and the external loop in an inserting mode through terminals on the first connecting ends, and the two adapter connectors are electrically connected with each other through a pre-connection cable connected with the terminals on the second connecting ends. Compared with the scheme of carrying out secondary equipment and external loop wiring on site in the prior art, the utility model omits a large number of on-site wiring processes, and greatly reduces the on-site construction amount, thereby achieving the effects of reducing the power failure time, reducing the cost and reducing the operation risk.

Description

Adapter for secondary equipment transformation

Technical Field

The utility model relates to the technical field of electric equipment transformation, in particular to an adapter for secondary equipment transformation.

Background

The power system includes a primary device and a secondary device. Primary devices refer to high voltage electrical devices, including generators, transformers, etc., that are used directly to produce, deliver, and distribute electrical energy. The secondary equipment is low-voltage electrical equipment required for monitoring, controlling, regulating and protecting the operation of the primary equipment and providing operation working conditions or production command signals for operation and maintenance personnel. Such as relays, fuses, etc. After the secondary equipment is used for a certain period of time, the problems of serious ageing and poor reliability exist, and the safe operation of the power grid is seriously influenced. Therefore, after the secondary equipment has been used for a certain period of time, it needs to be modified.

In the traditional technology, the secondary equipment is transformed by adopting a method for completely replacing secondary equipment, a screen cabinet, an external cable and the like. The method can result in longer outage times (about 8 to 12 days) of equipment in the power system, which can directly affect power delivery, thereby causing property loss. In addition, the transformation method involves more equipment, needs participation of an external construction party, and has higher labor cost and material resource cost, and involves an external loop during transformation, so that the operation risk is higher.

Based on the traditional technology, the current improvement scheme is a modification method for replacing only secondary devices without replacing a screen cabinet, and the method needs to carry out wiring between the screen cabinet and new secondary equipment on site.

However, the above improvement scheme shortens the power outage time (about 6 to 8 days) to a certain extent and reduces the construction amount, but the problems of overlong power outage time, high labor cost and material cost and high operation risk still exist.

Disclosure of Invention

Based on the above, it is necessary to provide an adapter for modifying a secondary device, aiming at the problems of long power failure time, high cost and high operation risk of the conventional secondary device modifying method.

An adapter for secondary equipment retrofit, comprising:

the two adapters comprise a shell, a first connecting end and a second connecting end are arranged on the outer wall of the shell, a plurality of terminals are arranged on the first connecting end and the second connecting end, and the terminals on the first connecting end and the terminals on the second connecting end in the shell are correspondingly connected; the two adapters are respectively spliced with the secondary equipment and the external loop through terminals on the first connecting end, and the two adapters are electrically connected with each other through a pre-wiring cable connected with the terminals on the second connecting end.

The adapter for the transformation of the secondary equipment comprises two adapters, wherein one adapter is spliced with new secondary equipment, the other adapter is spliced with an external loop, and the two adapters are connected through a pre-wiring cable. The first connecting end on the adapter supports plugging, namely the connection relation between the first connecting end and the terminal of the secondary equipment or the external loop is unique, and meanwhile, the corresponding connection relation between the terminal of the first connecting end and the terminal of the second connecting end on the same adapter is established and then is packaged in the shell, namely the connection relation between the terminals of the first connecting end and the terminal of the second connecting end is also unique. Therefore, the connection relation between the secondary equipment and the external loop can be changed only by changing the connection relation of the terminals on the second connection end between the two adapters. Before the secondary equipment is reformed on the construction site, the terminals of the second wiring ends on the two adapters are connected through the pre-wiring cable according to the uniquely determined terminal connection relation and the connection requirement of the secondary equipment and an external loop, so that the corresponding relation is established between the terminals of the first connection ends on the two adapters. When the construction site is modified by secondary equipment, the secondary equipment and the external loop can be correspondingly connected based on the terminal corresponding relation of the first connecting ends on the two adapters only by fast plugging the first connecting ends of the two adapters into the secondary equipment and the external loop respectively. Therefore, compared with the scheme of carrying out secondary equipment and external loop wiring on site in the prior art, the method omits a large number of on-site wiring processes, and greatly reduces the on-site construction amount, thereby achieving the effects of reducing the power failure time, reducing the cost and reducing the operation risk.

In one embodiment, the number of terminals at the first connection end is the same as the number of terminals at the second connection end on the same adapter, and the number of terminals on two adapters electrically connected to each other is the same.

The terminal number relation between the first connecting end and the second connecting end and the terminal number relation between the two connectors which are electrically connected with each other are limited, and the one-to-one correspondence relation between the terminals is ensured, so that wiring is facilitated.

In one embodiment, the adapter comprises a 14-core adapter for transmitting voltage or current; the terminals on the first connecting end and the second connecting end of the 14-core adapter are respectively provided with 14 terminals.

In one embodiment, the adapter comprises a 30-core adapter for transmitting switching values; the terminals on the first connecting end and the second connecting end of the 30-core adapter are respectively provided with 30 terminals.

The 14-core adapter and the 30-core adapter represent two different types of adapters. Different types of adapter can be matched for use, different analog signals are transmitted between the secondary equipment and an external loop, so that constructors can distinguish the two signals conveniently, and the wiring accuracy is improved.

In one embodiment, the first connecting end and the second connecting end are respectively located on two opposite side walls of the shell, the terminals on the first connecting end and the terminals on the second connecting end are distributed in an array mode in the longitudinal and transverse directions and are identical in distribution shape, and the terminals at positions corresponding to the two side walls of the first connecting end and the second connecting end are arranged on the shell and are electrically connected.

The above embodiment defines the terminal distribution on the same adapter, and the regular distribution form is convenient for determining the corresponding relation between the terminal on the first connecting end and the terminal on the second connecting end according to the position relation, thereby facilitating wiring and improving the wiring efficiency of the two adapters.

In one embodiment, the adaptor is provided with a positioning piece located on the surface where the first connection end is located.

The first connecting end is quickly plugged into and pulled out of the secondary equipment or an external loop through the positioning piece, so that the site construction efficiency in the secondary equipment transformation process is further improved.

In one embodiment, the housing includes a peripheral frame disposed on a surface of the first connection end, and the peripheral frame is provided with an opening, and the terminal of the first connection end is located in the peripheral frame and electrically connected with the secondary device or the external circuit through the opening on the peripheral frame.

The terminal of the first connecting end is a male head and is in plug-in fit with a female head on the secondary equipment or an external loop. The male is generally a thin pin, and is relatively fragile. The terminal of the first connecting end can be prevented from being directly stressed through the surrounding frame, so that the effect of protecting the terminal is achieved, and the connection reliability of the adapter and the secondary equipment or an external loop is improved.

In one embodiment, the housing is provided with mounting holes for fasteners to secure the adapter to the secondary device or to a device that receives an external circuit.

The adapter is fixed on the secondary equipment or the equipment for bearing the external loop through the mounting holes by the fasteners, so that poor contact caused by relative movement is avoided, and the connection reliability of the adapter and the secondary equipment or the external loop is improved.

In one embodiment, the terminal of the second connection end is crimped with the pre-wired cable.

The wiring between the terminal of the second connection end and the pre-wiring cable is completed before the site operation, and the process does not affect the efficiency of the site operation. Therefore, although the compression joint mode is longer in time consumption compared with the plugging mode, adverse effects on power failure time, cost and operation risk are avoided, and meanwhile, the connection strength is higher, so that the connection reliability of the terminal of the second connection end and the pre-wiring cable is guaranteed.

In one embodiment, the terminals of the second connection end are connected with the pre-connection cable in a double crimp mode.

Compared with the traditional single crimping mode, the double crimping mode can further improve the connection strength, so that the connection reliability of the terminal of the second connecting end and the pre-connection cable is further guaranteed.

Drawings

FIG. 1 is a schematic diagram showing the overall structure of an adapter for secondary equipment modification in an embodiment;

FIG. 2a is a schematic diagram of a first connection end according to an embodiment;

FIG. 2b is a schematic diagram of a second connection end according to an embodiment;

FIG. 3a is a schematic diagram illustrating a first connection end according to an embodiment;

fig. 3b is a schematic structural diagram of the second connection end in an embodiment.

In the figure, 1, an adapter; 101. a housing; 102. a first connection end; 103. a second connection end; 104. a terminal; 105. a positioning piece; 106. a surrounding frame; 107. a mounting hole; 2. pre-wiring the cable; 3. a fastener.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The method and the device are applied to the secondary equipment reconstruction scene. The old secondary equipment is connected with a screen cabinet, and the screen cabinet is provided with a terminal strip which adopts an external loop wiring mode. After the old equipment is dismantled, the new secondary equipment is connected with the terminal strip on the screen cabinet through the adapter disclosed by the embodiment, and is connected into an external loop, so that the transformation of the secondary equipment is realized.

As shown in fig. 1, fig. 1 shows an adapter for secondary equipment modification according to an embodiment of the present utility model, the adapter comprising: the two adapters 1, the two adapters 1 are electrically connected to each other by a pre-connection cable 2.

As shown in fig. 2a and 2b, the adapter 1 includes a housing 101, a first connection end 102 and a second connection end 103 are disposed on an outer wall of the housing 101, a plurality of terminals 104 are disposed on the first connection end 102 and the second connection end 103, and the terminals 104 on the first connection end 102 and the terminals 104 on the second connection end 103 in the housing 101 are correspondingly connected; the two adapters 1 are plugged into the secondary device and the external circuit via terminals 104 on the first connection end 102, respectively, and the two adapters 1 are electrically connected to one another via a pre-connection cable 2 connected to the terminals 104 on the second connection end 103.

The housing 101 is made of an insulating material, such as an insulating resin material. The connection to the external circuit, i.e. to the connection location of the old secondary device on the screen cabinet, is a terminal strip which is plugged into the terminal 104 on the first connection end 102.

Each adapter 1 has a first connection end 102 and a second connection end 103. The first connection end 102 has a plurality of terminals 104, the terminals 104 may be pins, and the pins may be regarded as male connectors, and are in plug-in fit with female connectors of the secondary device or the external circuit, so as to realize electrical connection between the two. The pins of the first connection end 102 are made of copper alloy, and are plated with gold on the surface thereof to reduce the contact resistance of the whole electrical circuit. The second connection end 103 is directly connected to the pre-connection cable 2, and is electrically connected to the second connection end 103 of the other adapter 1 through the pre-connection cable 2. The connection mode between the second connection end 103 and the pre-connection cable 2 can be selected according to the actual requirement. For example, wiring is done in different ways for different electrical connection reliability requirements.

According to the embodiment, the new secondary equipment is connected into the wiring position of the old secondary equipment and the screen cabinet through the adapter, so that the screen cabinet does not need to be replaced, the secondary equipment can be replaced on the basis of the screen cabinet, the power failure time is shortened, and meanwhile, the cost and the risk are reduced. The electrical connection between the two second connection ends 103 is according to the functional wiring, so that the two first connection ends 102 are correspondingly connected through the wiring of the second connection ends 103, the first connection ends 102 are electrically connected with the secondary equipment and the external circuit, the corresponding electrical connection between the secondary equipment and the external circuit is realized, and then the installation of the new secondary equipment on the basis of the original screen cabinet is realized. Since wiring between the second connection terminals 103 can be completed before a power outage, the power outage time is greatly reduced. In addition, as the adapter is connected with the secondary equipment and the external loop through the first connecting end 102, the adapter can be in quick plug fit with the secondary equipment and the external loop, so that the adapter efficiency is improved, the power failure time is further reduced, and the cost and the risk of on-site wiring are reduced.

In one embodiment, the number of terminals 104 of the first connection end 102 is the same as the number of terminals 104 of the second connection end 103 on the same adapter 1, and the number of terminals 104 on two adapters 1 electrically connected to each other is the same.

Taking fig. 2a and 2b as an example, if the number of terminals 104 on the first switching end of one switching head 1 is 14, the number of terminals 104 on the second switching end is also 14, and the number of terminals 104 of the switching head 1 is 28. The number of terminals 104 of another adapter 1 connected to the adapter 1 should also be 28. Since the number of terminals 104 of the first connection terminal 102 is the same as the number of terminals 104 of the second connection terminal 103, the number of terminals 104 on the first connection terminal and the number of terminals 104 on the second connection terminal of the other adapter 1 are both 14.

The relationship between the number of terminals 104 of the first connection terminal 102 and the number of terminals 104 of the second connection terminal 103 and the relationship between the number of terminals 104 on the two adapter 1 electrically connected to each other are defined, and the one-to-one correspondence between the terminals 104 is ensured. When the constructor is used for wiring the second connecting end 103, the problem that the connection relation of the one-to-many or many-to-many terminals 104 increases wiring difficulty is avoided, so that construction is facilitated.

In one embodiment, the adapter 1 comprises a 14-core adapter for transmitting a voltage or current; the 14 terminals 104 on the first connection end 102 and the second connection end 103 of the 14-core adapter are respectively provided with 14 terminals.

Wherein, the transmission voltage or current is connected to the power supply.

As shown in fig. 2a and 2b, a schematic structure of a 14-core adapter is shown, and the 14-core adapter is a standard adapter and can be applied to conventional 14-core female secondary equipment or a screen cabinet terminal strip in the market. The 14 terminals 104 of the first connecting end 102 of the 14-core adapter are made of copper alloy with gold plated surfaces, so that the contact resistance of the whole electric loop is reduced. The second connection end 103 of the 14-core adapter is a 14-hole connection terminal 104, and is connected with the pre-connection cable 2. The adapter 1 of the embodiment ensures that the adapter 1 can work stably and normally under the direct current voltage of 110V or 220V, the contact resistance can be smaller than 5mΩ after reliable connection, the contact part between the adapter 1 and the secondary equipment or the screen cabinet terminal row can bear 10A current, the insulation between the metal part of the adapter 1 and the plastic shell can be not smaller than 1000mΩ under the direct current voltage of 500V under normal temperature and normal state, and can bear 10 surge voltages of 6000V.

In one embodiment, the adapter 1 comprises a 30-core adapter for transmitting switching values; the terminals 104 on the first connection end 102 and the second connection end 103 of the 30-core adapter are respectively provided with 30 terminals.

The switching value mainly refers to the opening and closing amount, and refers to auxiliary points of a device, such as auxiliary points of a relay (deflection after overtemperature of a transformer) of a temperature controller of the transformer and auxiliary points of a valve cam switch (deflection after valve switch). Auxiliary points (displacement after the action of the contactor) and thermal relays (displacement after the action of the thermal relays) carried by the contactor are generally transmitted to a PLC (Programmable Logic Controller, a programmable logic controller) or a comprehensive protection device. Taking a transformer gas relay as an example for explanation, the gas relay acts, and the closing of the contact is equivalent to the input of a switching value signal into the secondary equipment, namely the opening. If the secondary device needs to be tripped at the moment, a tripping instruction of switching value is output, namely, the secondary device is started.

As shown in fig. 3a and 3b, a schematic structure of a 30-core adapter is shown, and the 30-core adapter is a standard adapter 1, which is applicable to a conventional 30-core female secondary device or a screen cabinet terminal strip in the market. In order to realize stable and normal operation of the adapter 1 under 110V or 220V voltage, the contact resistance is smaller than 5mΩ after reliable connection, the contact part between the adapter 1 and the secondary equipment or the screen cabinet terminal row can bear 10A current, the insulation between the metal part of the adapter 1 and the plastic shell under normal temperature and normal state can be not smaller than 1000mΩ under 500V direct current voltage, and the adapter can bear 6000V requirements of 10 surges and the like. Therefore, the terminals 104 of the first connecting end 102 of the 30-core adapter are all made of copper alloy and are plated with gold on the surface, the second connecting end 103 of the adapter 1 is a 30-hole connecting terminal 104, and a cable core with a wire diameter of 2.5 square millimeters can be connected and reliably fixed through inherent screws on the adapter 1.

The 14-core adapter and the 30-core adapter represent two different types of adapters 1. Different adapters 1 can be used simultaneously to transmit different analog signals, so that constructors can distinguish conveniently, and wiring accuracy is improved.

In one embodiment, a 14-core adapter and a 30-core adapter are used in the same scenario, with a 14-core adapter for current/voltage transmission and a 30-core adapter for on/off transmission. The corresponding type of adapter 1 is used according to the functions of the secondary equipment and the terminal strip on the screen cabinet.

The same type of adapter 1 at adapter both ends is symmetrical setting, carries out electric connection through pre-wiring cable 2 between the second link 103 of both sides adapter 1, and the connected mode can be nimble changeable, distributes according to the function of every terminal 104.

In one embodiment, the first connection end 102 and the second connection end 103 are respectively located on two opposite side walls of the housing 101, the terminals 104 on the first connection end 102 and the terminals 104 on the second connection end 103 are distributed in an array along the longitudinal and transverse directions and have the same distribution shape, and the housing 101 is provided with the terminals 104 at positions corresponding to the two side walls of the first connection end 102 and the second connection end 103.

The present embodiment defines the positions of the terminals 104 on the same adapter 1, so as to determine the correspondence between the terminals 104 on the first connection end 102 and the terminals 104 on the second connection end 103 according to the positional relationship. When constructors wire, the constructors do not need to repeatedly turn over the adapter 1 to observe the first connecting end 102 and the second connecting end 103 or look over the connection design diagram of the terminals 104 of the first connecting end or the second connecting end, the corresponding relation between the first connecting end 102 and the second connecting end 103 can be known, the constructors can easily get hands, the wires are further facilitated, and the wire distribution efficiency of the two adapters 1 is improved.

Taking the adapter 1 shown in fig. 2a and 2b as an example, the terminals 104 on the first connection end 102 are arranged in a matrix array of seven rows and two columns, and the terminals 104 on the second connection end 103 are also arranged in a matrix array of seven rows and two columns. The correspondence between the first connection terminal 102 and the terminal 104 of the second connection terminal 103 is related to the positional relationship of the terminal 104.

In one embodiment, as shown in fig. 2a, the adapter 1 is provided with a positioning member 105 located on the surface of the first connection end 102.

In order to avoid misalignment of the connection of the terminal 104 on the first connection end 102 with the secondary device or the external circuit, a positioning member 105 is provided on the surface of one connection end. The secondary device or the device carrying the external loop (i.e. the screen cabinet) is provided with a positioning groove which is correspondingly matched with the positioning piece 105 in a plugging manner at the position corresponding to the positioning piece 105. Through the cooperation location of setting element 105 and constant head tank, make first link 102 and secondary equipment or external circuit quick and accurate plug to further improve the site operation efficiency in the secondary equipment transformation process.

In one embodiment, as shown in fig. 3a, the housing 101 includes a peripheral frame 106 distributed on a surface of the first connection end 102, and an opening is formed on the peripheral frame 106, and the terminal 104 of the first connection end 102 is located in the peripheral frame 106 and is electrically connected to the secondary device or the external circuit through the opening on the peripheral frame 106.

The enclosure frame 106 can prevent external force from directly acting on the terminal 104, so as to protect the terminal 104 of the first connection end 102.

In one embodiment, as shown in fig. 2a, the housing 101 is provided with mounting holes 107 for the fasteners 3 to secure the adapter 1 to a secondary device or a device receiving an external circuit.

Wherein, the equipment for receiving the external loop is a screen cabinet. The fastener 3 passes through the mounting hole 107 to fix the adapter 1 on the secondary equipment or equipment for receiving an external circuit, so that poor contact caused by displacement of the adapter 1 relative to the screen cabinet is avoided, and the connection reliability of the adapter 1 and the secondary equipment or the external circuit is improved. In this embodiment, the fastener 3 may be a bolt, the mounting hole 107 is a screw hole matched with the bolt, and the secondary device or the device for receiving the external circuit is also provided with a screw hole matched with the bolt, so as to realize fixation.

In one embodiment, the terminal 104 of the second connection end 103 is crimped with the pre-connection cable 2.

The crimping is a process of applying pressure to the contact area between the terminal 104 and the pre-connection cable 2 to form the same, thereby realizing tight connection. The terminal 104 of the second connection end 103 is connected with the pre-connection cable 2 by crimping, and reliable connection between the two is ensured.

In one embodiment, as shown in fig. 2a and 2b, the terminals 104 of the second connection end 103 are connected with the pre-connection cable 2 in a double crimp mode.

The double-crimping mode adopts double-crimping copper noses, one end of the double-crimping copper noses can be pressed on the cable cover, and the other end of the double-crimping copper noses adopts double screws to fix the pre-wiring cable 2. The reliable electrical connection of copper nose and pre-connection cable 2 can be guaranteed to two pressure mouthfuls double protection, avoids the phenomenon that later stage becomes flexible and drops.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An adapter for modifying a secondary device, comprising:

the connector comprises a shell, a first connecting end and a second connecting end are arranged on the outer wall of the shell, a plurality of terminals are arranged on the first connecting end and the second connecting end, and the terminals on the first connecting end and the terminals on the second connecting end are correspondingly connected in the shell; the two adapter connectors are respectively connected with the secondary equipment and the external loop in an inserting mode through the terminals on the first connecting end, and the two adapter connectors are mutually and electrically connected through a pre-wiring cable connected with the terminals on the second connecting end.

2. The adapter for modification of secondary equipment according to claim 1, wherein:

the number of the terminals of the first connecting end is the same as that of the terminals of the second connecting end on the same adapter, and the number of the terminals on the two adapters which are electrically connected with each other is the same.

3. The adapter for secondary equipment modification according to claim 2, wherein:

the adapter comprises a 14-core adapter for transmitting voltage or current; the terminals on the first connecting end and the second connecting end of the 14-core adapter are respectively provided with 14 terminals.

4. The adapter for secondary equipment modification according to claim 2, wherein:

the adapter comprises a 30-core adapter for transmitting switching value; the terminals on the first connecting end and the second connecting end of the 30-core adapter are respectively provided with 30 terminals.

5. The adapter for modification of secondary equipment according to claim 1, wherein:

the first connecting end and the second connecting end are respectively positioned on two opposite side walls of the shell, the terminals on the first connecting end and the terminals on the second connecting end are distributed in an array mode along the longitudinal and transverse directions and are identical in distribution shape, and the shell is provided with terminals at positions corresponding to the two side walls of the first connecting end and the two side walls of the second connecting end.

6. The adapter for modification of secondary equipment according to claim 1, wherein:

the adapter is provided with a locating piece positioned on the surface where the first connecting end is positioned.

7. The adapter for modification of secondary equipment according to claim 1, wherein:

the shell comprises a surrounding frame distributed on the surface where the first connecting end is located, an opening is formed in the surrounding frame, and the terminal of the first connecting end is located in the surrounding frame and electrically connected with the secondary equipment or the external loop through the opening in the surrounding frame.

8. The adapter for modification of secondary equipment according to claim 1, wherein:

and the shell is provided with a mounting hole for fixing the adapter with the secondary equipment or the equipment for bearing the external loop by a fastener.

9. The adapter for modification of secondary equipment according to claim 1, wherein:

the terminal of the second connection end is crimped with the pre-connection cable.

10. The adapter for secondary equipment modification according to claim 9, wherein:

the terminal of the second connection end is connected with the pre-connection cable in a double-compression mode.