Auxiliary device for rapidly controlling loop state

Abstract

The invention belongs to the technical field of electric energy metering, and particularly discloses an auxiliary device for rapidly controlling a loop state, which comprises a packaging shell and a junction box, the junction box is arranged on the packaging shell, and a relay and a mutual inductor are also arranged in the packaging shell. A normally closed contact switch on the relay is connected with a voltage loop on the junction box, and a normally open contact switch on the relay is connected with a current loop on the junction box; a current transformer is connected in series in the current loop; a switch used for controlling the normally closed contact switch and the normally open contact switch of the relay to be switched off and switched on is installed on the packaging shell. According to the invention, the working efficiency and safety can be improved, the electric energy meter can be mounted, replaced, verified and dismounted without power failure, and the operation is safer.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy metering, and in particular to an auxiliary device for quickly controlling a loop state. Background Art

[0002] Electric energy metering professional sites often involve the installation, replacement and removal of electric energy meters. The traditional working method mainly involves the traditional short-circuiting and disconnecting of the combined device and the removal of the insulation wrapping of exposed wiring, which involves the safety of live operation of the secondary circuit and the convenience of work.

[0003] During the electric energy metering work connected through the transformer, when the electric energy meter is replaced, calibrated and removed, in order to ensure the closed loop of the transformer current secondary circuit and the open circuit of the voltage secondary circuit, it is necessary to short-circuit the current connecting piece on the junction box and disconnect the voltage connecting piece on the junction box.

[0004] However, improper operations and slow operation processes often occur during work; short-circuit current time differences are easily generated, and the short-circuit process is slow for customers with high power consumption, which will cause errors in power outages; in addition, a cross screwdriver and a flat-blade screwdriver need to be used simultaneously during the operation. Improper operation may easily lead to safety hazards of electric shock and the risk of contact caused by accidentally touching adjacent screws. Summary of the invention

[0005] The invention provides an auxiliary device for quickly controlling a loop state, aiming at improving working efficiency and safety.

[0006] The present invention is implemented through the following technical scheme: an auxiliary device for quickly controlling the state of a circuit, comprising a packaging shell and a junction box, the junction box is installed on the packaging shell, a relay and a mutual inductor are also installed on the packaging shell, a normally closed contact switch on the relay connects the voltage circuit on the junction box, and a normally open contact switch on the relay connects the current circuit on the junction box; a current mutual inductor is connected in series in the current circuit; a switch for controlling the normally closed contact switch and the normally open contact switch of the relay to be disconnected and connected is installed on the packaging shell.

[0007] Further, the relay includes a first relay and a second relay, the mutual inductor includes a first mutual inductor and a second mutual inductor, the first relay and the first mutual inductor are located on one side of the junction box, and the second relay and the second mutual inductor are located on the other side of the junction box; the first relay and the second relay respectively control two pairs of phase voltage circuits and two-phase current circuits in the three-phase voltage.

[0008] Furthermore, a voltage connection piece and a current connection piece are installed on the junction box, the voltage circuit is connected to the normally closed contact switch of the relay through the voltage connection piece, and the current circuit is connected to the normally open contact switch of the relay through the current connection piece.

[0009] Furthermore, a display is installed on the packaging shell, and the display is used to monitor and display the current and voltage states in the current loop and the voltage loop.

[0010] Furthermore, the junction box includes a box body, the box body is provided with a wiring terminal, the box body is provided with a plurality of wire inlet channels, the two ends of the plurality of wire inlet channels respectively pass through the two sides of the box body, and the two ends of the wire inlet channels are respectively a wire inlet and a wire outlet; the box body is provided with a plurality of vertical holes perpendicular to the plurality of wire inlet channels; a clamping member for clamping or loosening the cables connected to the wire inlet channels is provided in the vertical holes.

[0011] Furthermore, the pressing member includes a pressing rod, a first spring and a pressing block, the pressing rod is located in the vertical hole and can move axially along the vertical hole, the pressing block is located below the pressing rod, and the first spring is connected between the pressing block and the pressing rod; a guide groove is provided on the inner side wall of the vertical hole, and the guide groove is an L-shaped groove. A protrusion is connected to one side of the pressing rod, and the protrusion is located in the L-shaped groove and can move along the vertical groove and the horizontal groove of the L-shaped groove. When the protrusion is located in the horizontal groove of the L-shaped groove, the pressing block is in a state of pressing the cable, and when the protrusion is located in the vertical groove of the L-shaped groove, the pressing block is in a state of loosening the cable.

[0012] Furthermore, the clamping member further comprises a sleeve, the sleeve is located in the vertical hole and connected to the vertical hole, the compression rod is inserted into the sleeve and can move axially along the sleeve; the guide groove is provided on the inner side wall of the sleeve.

[0013] Furthermore, the sleeve is detachably connected to the vertical hole.

[0014] Furthermore, a pressure head is connected to the top end of the pressure rod, and the pressure head is vertically connected to the pressure rod.

[0015] Furthermore, a plurality of limit grooves are provided at the top of the sleeve, and the plurality of limit grooves are evenly distributed along the circumference of the sleeve; at least two vertically arranged sliding holes are provided on the pressure head, and the bottom ends of the sliding holes pass through the bottom ends of the pressure head, and a sliding rod is provided in the sliding hole along its axial sliding, and a limiting ball is connected to the end of the sliding rod away from the pressure head, and the limiting ball is located in the limiting groove, and a second spring is provided between the limiting ball and the pressure head, and the second spring is sleeved on the outside of the sliding rod; when the pressure head is rotated to rotate the protrusion from the vertical groove of the L-shaped groove to the horizontal groove of the L-shaped groove, the limiting ball can be rotated to another adjacent limiting groove.

[0016] Furthermore, the switch is a toggle switch or a rocker switch.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. The present invention utilizes the principle of relay-controlled contact switches, connects a normally closed contact switch in the voltage loop, and is in an on state when the voltage is working normally, thereby preventing the voltage loop from being short-circuited or grounded during meter replacement, thereby improving work efficiency and safety; the normally open contact switch is controlled by a relay to connect the current loop, and a small current transformer is connected in series in the current loop. The current flowing in through the transformer will be changed to a safe range according to the transformation ratio, and will not cause current overheating or device burnout, and the formed current loop will not flow into the device, thereby ensuring that the current loop forms a short-circuit loop under a safety level of current, thereby realizing replacement, verification and removal of the electric energy meter without power outage, and the operation is safer.

[0019] In this solution, a relay is connected in series in the device to control the voltage circuit, and a current transformer is connected in series to the current circuit. The state of the entire circuit is controlled by the switch to control the relay. After the switch is actuated, the relay acts quickly, and at the same time, the effect of disconnecting the voltage and short-circuiting the current is achieved.

[0020] 2. The relay access circuit control in the present invention fully utilizes the control and conduction principles of the relay to directly control the current circuit and the voltage circuit, thereby improving the convenience during the replacement, calibration and removal of the electric energy meter.

[0021] 3. The display added in the present invention can monitor and display the current and voltage status in real time, and can observe the current and voltage indications in real time, so as to monitor the circuit status. Using the principle of the electric test pen, the display is modified and added to both ends of the device. The current and voltage are displayed in the normal working state. When the electric energy meter is replaced, checked and removed, the real-time current and voltage indications are displayed, which plays a monitoring and display role.

[0022] 4. The present invention uses a clamping piece to compress or loosen the cables connected to the junction box. Compared with the prior art, a cross screwdriver and a flat screwdriver are used simultaneously to tighten or loosen the screws to compress or loosen the cables. Improper operation may easily lead to potential safety hazards of electric shock and the risk of contact caused by accidentally touching adjacent screws. After the cables are inserted into the inlet and outlet of the junction box, the cables are compressed by the clamping piece to connect the cables to the junction box.

[0023] When the cable is in a state of being compressed, the pressure bar is simply rotated to move the pressure bar into the horizontal groove of the L-shaped groove. When the pressure bar is released, the pressure block below the pressure bar will continue to compress the cable under the action of the spring. When the cable needs to be loosened, the pressure bar only needs to be rotated in the opposite direction to move the pressure bar to the vertical groove of the L-shaped groove. At this time, under the resetting action of the spring, the pressure bar will move upward along the vertical groove of the L-shaped groove and reset, thereby driving the pressure block to move upward and leave the cable. At this time, the cable is in a loosened state, which is convenient for pulling out the cable, thereby performing operations such as changing meters and wiring.

[0024] In the process of loosening and tightening the cable in the present invention, the purpose of tightening and loosening the cable can be quickly achieved by pressing and rotating the position of the protrusion on the pressure rod in the horizontal groove and the vertical groove, which effectively improves the operating efficiency, simplifies the tools used in the operation, and reduces the safety hazards of electric shock caused by improper operation and the risk of contact caused by accidentally touching the adjacent screws.

[0025] 5. The clamping member in the present invention also includes a sleeve, and the guide groove is provided on the inner side wall of the sleeve, so that the compression rod cooperates with the guide groove on the sleeve to achieve the function of clamping or loosening the cable. Compared with the guide groove provided in the vertical hole of the junction box, the guide groove provided on the inner wall of the sleeve is more convenient for manufacturing and processing during the production process. In addition, the sleeve and the vertical hole in this solution are detachably connected, so that it is convenient to separate the manufacturing and processing from the box body of the junction box, and it is convenient to quickly remove the entire clamping member for maintenance and replacement without destroying the structure of the junction box, which is more convenient to operate.

[0026] The pressure head connected to the top end of the pressure rod in the present invention increases the operating area and is more convenient to operate.

[0027] 6. In the present invention, the position of the protrusion on one side of the pressure rod changes between the vertical groove and the horizontal groove of the L-shaped groove to achieve the compression and loosening of the cable. However, when the protrusion moves into the horizontal groove to achieve the function of compressing the cable, since there is no limiting structure in the horizontal groove, during actual use, it is possible that the protrusion may slide out of the horizontal groove into the vertical groove due to the action of external force, resulting in the protrusion moving upward under the action of the first spring, causing the pressure block to loosen the cable.

[0028] Therefore, in the present invention, a plurality of limit grooves are opened at the top end of the sleeve, and a sliding rod, a sliding hole, a limit ball and a second spring are set. The limit ball is stuck in the sliding hole under the action of the second spring to limit the position state of the pressure rod and the pressure head, so that the position state of the pressure rod remains stable.

[0029] Furthermore, when the pressure head is pressed downward, the protrusion moves from the upper part of the vertical groove to the bottom part of the vertical groove, and the sliding rod moves toward the upper part of the sliding hole, and the second spring is compressed for the first time; when the pressure head is rotated again to rotate the protrusion from the vertical groove to the horizontal groove so that the pressure block presses the cable, the pressure head will drive the limiting ball to move from one limiting groove to another adjacent limiting groove. During this process, the second spring will be compressed for the second time to ensure that the limiting ball moves smoothly to the other limiting groove. In this way, under the cooperation of the limiting ball and the limiting groove, the protrusion can be stably located in the horizontal groove, avoiding the situation where the protrusion slides out of the horizontal groove by itself and causes the pressure block to loosen the cable. In addition, in the present invention, since the second spring is compressed twice, the pressing effect of the pressure block on the cable can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0031] Figure 1 A three-dimensional diagram of Embodiment 1 of an auxiliary device for quickly controlling a loop state according to the present invention;

[0032] Figure 2 This is an exploded view of Embodiment 1 of an auxiliary device for quickly controlling a loop state of the present invention;

[0033] Figure 3 This is a schematic diagram of the coordinated connection between the relay and the mutual inductor and the current loop and the voltage loop in Example 1 of an auxiliary device for quickly controlling the loop state of the present invention;

[0034] Figure 4 It is a top view of a junction box in Embodiment 2 of an auxiliary device for quickly controlling a loop state of the present invention;

[0035] Figure 5 for Figure 4 Sectional view at EE;

[0036] Figure 6 for Figure 5 A partial enlarged view of point F in the middle;

[0037] Figure 7 This is a schematic structural diagram of a guide groove provided on a box body in Example 2 of an auxiliary device for quickly controlling a loop state of the present invention;

[0038] Figure 8 It is a partial cross-sectional view of a pressing member and a junction box in Embodiment 3 of an auxiliary device for quickly controlling a loop state of the present invention;

[0039] Fig. 9 It is a partial cross-sectional view of a pressing member and a junction box in Embodiment 4 of an auxiliary device for quickly controlling a loop state of the present invention;

[0040] Fig.10 It is a top view of the sleeve in Embodiment 4 of an auxiliary device for quickly controlling the state of a loop of the present invention;

[0041] Fig.11 This is a schematic diagram of the state when the protrusion moves into the transverse groove of the L-shaped groove in Example 4 of an auxiliary device for quickly controlling the state of a loop of the present invention.

[0042] Marks and corresponding parts names in the attached drawings:

[0043] Encapsulation shell 1, bottom plate 101, first connecting hole 102, junction box 2, second connecting hole 201, box body 202, connecting terminal 203, first relay 3, second relay 4, first mutual inductor 5, second mutual inductor 6, display 7, incoming line channel 8, pressing piece 9, pressing head 901, pressing rod 902, first spring 903, pressing block 904, protrusion 905, sleeve 906, cable 10, guide groove 11, horizontal groove 110, vertical groove 111, voltage connecting piece 12, current connecting piece 13, vertical hole 14, sliding hole 15, sliding rod 16, second spring 17, limiting ball 18, limiting groove 19, connecting plate 20. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0045] Example 1

[0046] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment 1 provides an auxiliary device for quickly controlling the state of a circuit, including a packaging shell 1 and a junction box 2. In this embodiment, the packaging shell 1 is a transparent insulating material cover. The transparent insulating material cover in this embodiment can fully match the appearance size of the device, and can isolate and protect the internal relays and mutual inductors to prevent misoperation and reduce the risk of electricity theft.

[0047] The junction box 2 is installed on the packaging shell 1. In this embodiment, the packaging shell 1 and the junction box 2 are detachably connected. Specifically, a first connection hole 102 is opened on the left and right parts of the packaging shell 1, and a second connection hole 201 is opened on the left and right parts of the junction box 2. After the junction box 2 is installed inside the packaging shell 1, the first connection hole 102 on the packaging shell 1 and the second connection hole 201 on the junction box 2 coincide with each other, and then screws or bolts are inserted into the first connection hole 102 and the second connection hole 201 to realize a detachable connection, which is convenient for assembly and disassembly.

[0048] The interior of the packaging shell 1 is hollow, and the junction box 2 is installed in the middle inner cavity of the packaging shell 1. The top and both sides of the packaging shell 1 are provided with openings, which can expose the wire inlet and wire outlet on the top and both sides of the junction box 2, thereby facilitating wiring on the junction box 2.

[0049] A relay and a transformer are also installed in the packaging shell 1. The normally closed contact switch on the relay connects the voltage circuit on the junction box 2, and the normally open contact switch on the relay connects the current circuit on the junction box 2. The current transformer is connected in series in the current circuit, that is, in this embodiment, the current is changed to a safe range through the transformer before being connected to the relay, thereby avoiding current overheating or device burnout. A switch for controlling the normally closed contact switch and the normally open contact switch of the relay to disconnect and connect is installed on the packaging shell 1.

[0050] The switch is a toggle switch or a rocker switch, and the switch in this embodiment is described by taking the toggle switch as an example. In this embodiment, the relay is a RPM22P7 relay, and the transformer is a ZHT103U current transformer.

[0051] The junction box 2 in this embodiment is a three-phase three-wire junction box 2, which includes phase A, phase B and phase C, wherein phase B is grounded. Figure 2 As shown, in this embodiment, the relay includes a first relay 3 and a second relay 4, and the mutual inductor includes a first mutual inductor 5 and a second mutual inductor 6. The first relay 3 and the first mutual inductor 5 are located on one side of the junction box 2, and the second relay 4 and the second mutual inductor 6 are located on the other side of the junction box 2; the first relay 3 and the second relay 4 respectively control two pairs of phase voltage loops and two-phase current loops in the three-phase voltage, that is, the first relay 3 controls the AB phase voltage and the A phase current, and the second relay 4 controls the CB phase voltage and the C phase current.

[0052] like Figure 3 As shown, a voltage connection piece 12 and a current connection piece 13 are installed on the junction box 2. The voltage circuit is connected to the normally closed contact switch of the relay through the voltage connection piece 12, and the current circuit is connected to the normally open contact switch of the relay through the current connection piece 13.

[0053] Combination Figure 1 and Figure 2 As shown, a display 7 is mounted on the packaging shell 1, and the display 7 is used to monitor and display the current and voltage states in the current loop and the voltage loop.

[0054] The specific implementation process is as follows:

[0055] In this embodiment, the relay controls the contact switches of the voltage circuit and the current circuit. When the relay loses power, the normally closed contact switch closes to connect to the voltage circuit, and the normally open contact switch disconnects the current short-circuit circuit, which is the normal operation of the device; when the relay is energized, the normally closed contact switch disconnects the voltage access circuit, and the normally open contact switch closes to connect the series circuit with the current transformer, forming a current circuit that flows into the current transformer to form a short-circuit closed loop, which is the working state of the device. At this time, the displays 7 on both sides simultaneously display the current and voltage indications.

[0056] Specifically: the normally open contact switch or normally closed contact switch of the relay is controlled to be connected and disconnected by the button switch, and the current loop Ia and the current loop Ic are connected in series in the loop. When the button switch is pressed, the normally open contact switch of the relay is closed, and the current loop is connected. The current flows through the A-phase current transformer (the first transformer 5) and the C-phase current transformer (the second transformer 6) to form a loop, and the current is changed to the minimum range and safely connected in series in the loop to avoid damage to the equipment caused by excessive current.

[0057] The voltage circuit is controlled by the normally closed contact switch of the relay, and a voltage path is formed between the Uab and Ucb phase voltages. When the button switch is pressed, the relay is activated, and the normally closed contact switch is disconnected, so that the voltage circuit is in an open state, ensuring that the secondary voltage will not be short-circuited or grounded, and protecting the stable operation of the transformer. At the same time, the display screen is connected to the voltage and current circuits respectively. When the button switch is activated, the voltage circuit is open and the current circuit is short-circuited. The display screen shows the real-time voltage and current values, which is convenient for observing and monitoring the circuit status.

[0058] Example 2

[0059] Combination Figure 4 and Figure 5 As shown, the difference between this embodiment and embodiment 1 is that: in this embodiment, the junction box 2 includes a box body 202, and a connection terminal 203 is provided in the box body 202. The connection terminal 203 facilitates the connection and conduction of the cable 10.

[0060] The box body 202 is provided with a plurality of cable inlet channels 8 , both ends of which pass through both sides of the box body 202 , respectively. The two ends of the cable inlet channels 8 are a cable inlet and a cable outlet, respectively, to facilitate the insertion of the cable 10 .

[0061] A plurality of vertical holes 14 perpendicular to the plurality of cable inlet channels 8 are formed on the box body 202 ; a clamping member 9 for clamping or loosening the cables 10 connected to the cable inlet channels 8 is disposed in the vertical holes 14 .

[0062] Combination Figure 6 As shown, the pressing member 9 includes a pressing rod 902, a first spring 903 and a pressing block 904. The pressing rod 902 is located in the vertical hole 14 and can move axially along the vertical hole 14. In this embodiment, the top end of the pressing rod 902 is connected to a pressing head 901, and the pressing head 901 is vertically connected to the pressing rod 902. The setting of the pressing head 901 is convenient for operation and is convenient for driving the pressing rod 902 to move and rotate vertically.

[0063] The pressure block 904 is located below the pressure rod 902, and the first spring 903 is connected between the pressure block 904 and the pressure rod 902. In actual manufacturing, grooves can be opened at the bottom of the pressure rod 902 and the top of the pressure block 904, so that the two ends of the first spring 903 are respectively restricted in the groove at the bottom of the pressure rod 902 and the groove at the top of the pressure block 904.

[0064] The inner wall of the vertical hole 14 is provided with a guide groove 11. Figure 7 As shown, the guide groove 11 is an L-shaped groove, so that the guide groove 11 has a vertical groove 111 and a horizontal groove 110 that are perpendicular to each other.

[0065] Combination Figure 6 As shown, a protrusion 905 is connected to one side of the pressure rod 902. The protrusion 905 is located in the L-shaped groove and can move along the vertical groove 111 and the horizontal groove 110 of the L-shaped groove. When the protrusion 905 is located in the horizontal groove 110 of the L-shaped groove, the pressure block 904 is in a state of pressing the cable 10. When the protrusion 905 is located in the vertical groove 111 of the L-shaped groove, the pressure block 904 is in a state of loosening the cable 10.

[0066] The specific implementation process is as follows: after the cable 10 is inserted into the incoming line channel 8 through the incoming line port and the outgoing line port of the junction box 2, the pressure head 901 is pressed downward to push the pressure rod 902, the first spring 903 and the pressure block 904 to move downward, so that the protrusion 905 on the pressure rod 902 slides downward along the vertical groove 111 of the L-shaped groove to the bottom of the vertical groove 111. At this time, the first spring 903 is compressed, so that the pressure block 904 is tightly pressed on the cable 10 in the incoming line channel 8, and then the pressure head 901 is rotated to rotate the protrusion 905 on the pressure rod 902 from the vertical groove 111 to the horizontal groove 110, so that the pressure block 904 keeps pressing the cable 10, thereby achieving the purpose of connecting the cable 10 to the terminal 203 of the junction box 2.

[0067] When the cable 10 needs to be loosened, the pressure head 901 is rotated in the opposite direction to move the protrusion 905 on the pressure rod 902 from the horizontal groove 110 to the vertical groove 111, and reset upward under the action of the first spring 903, so that the pressure block 904 is away from the cable 10, thereby loosening the cable 10.

[0068] Example 3

[0069] like Figure 8 As shown, the difference between this embodiment and embodiment 2 is that: in this embodiment, the clamping member 9 also includes a sleeve 906, and the sleeve 906 is located in the vertical hole 14 and connected to the vertical hole 14. In this embodiment, the sleeve 906 and the vertical hole 14 are detachably connected. Specifically, the sleeve 906 and the vertical hole 14 are threadedly connected or snap-fitted.

[0070] The pressure rod 902 is inserted into the sleeve 906 and can move axially along the sleeve 906 ; in this embodiment, the guide groove 11 is opened on the inner wall of the sleeve 906 .

[0071] The arrangement of the sleeve 906 in this solution can combine the guide groove 11 with the sleeve 906, so that the entire pressing member 9 can be easily removed from the junction box 2, or installed as a whole on the junction box 2, which is convenient for assembly and disassembly. In addition, during the manufacturing process, it is convenient for mass production, and compared with the arrangement of the guide groove 11 in the vertical hole 14, the arrangement of the sleeve 906 in this embodiment is more convenient for processing the guide groove 11 and assembling the pressure rod 902.

[0072] Example 4

[0073] like Fig. 9 and Fig.10 As shown, the difference between this embodiment and embodiment 3 is that: in this embodiment, a plurality of limiting grooves 19 are provided at the top end of the sleeve 906, the plurality of limiting grooves 19 are evenly distributed along the circumference of the sleeve 906, and the limiting grooves 19 are hemispherical groove structures.

[0074] At least two vertically arranged sliding holes 15 are provided on the pressing head 901, the bottom end of the sliding hole 15 passes through the bottom end of the pressing head 901, and the top end of the sliding hole 15 is located at the upper part of the pressing head 901, and a sliding rod 16 is axially slidably fitted in the sliding hole 15, and the end of the sliding rod 16 away from the pressing head 901 is connected to a limiting ball 18, and the limiting ball 18 is located in a limiting groove 19, and a second spring 17 is provided between the limiting ball 18 and the pressing head 901, and the second spring 17 is sleeved on the outside of the sliding rod 16.

[0075] In this embodiment, a connecting plate 20 is fixedly connected to the top of the limiting ball 18, and the end of the sliding rod 16 away from the pressure head 901 is connected to the connecting plate 20, thereby indirectly realizing the connection with the limiting ball 18. The setting of the connecting plate 20 is more convenient for the connection of the sliding rod 16 and the connection and coordination of the second spring 17. In this embodiment, the sliding rod 16 and the connecting plate 20 can be connected by threaded connection or other fixed methods, which is not specifically limited here.

[0076] When the pressure head 901 is rotated to rotate the protrusion 905 from the vertical groove 111 of the L-shaped groove to the horizontal groove 110 of the L-shaped groove, the limiting ball 18 can be rotated to another adjacent limiting groove 19, thereby limiting the position of the protrusion 905 and preventing the protrusion 905 from sliding out of the horizontal groove 110 by itself and affecting the pressing effect of the pressure block 904 on the cable 10.

[0077] In this embodiment, the number of sliding holes 15 is the same as the number of limiting grooves 19, so that each limiting groove 19 has a limiting ball 18, and the limiting effect is better; and in this embodiment, the length of the sliding hole 15 is greater than the length of the limiting ball 18 and the L-shaped sliding groove, which can ensure the smooth axial movement of the sliding rod 16 and the limiting ball 18.

[0078] Combination Fig.11 As shown, in actual use, when the pressure head 901 is pressed downward, the protrusion 905 moves from the upper part of the vertical groove 111 to the bottom of the vertical groove 111, and the sliding rod 16 moves toward the upper part of the sliding hole 15, and the second spring 17 is compressed for the first time; when the pressure head 901 is rotated again to rotate the protrusion 905 from the vertical groove 111 to the horizontal groove 110 and the pressure block 904 presses the cable 10, the pressure head 901 will drive the limiting ball 18 to move from one limiting groove 19 to another adjacent limiting groove 19. During this process, the second spring 17 will be compressed for the second time to ensure the smooth movement of the limiting ball 18 to the other limiting groove 19, and when the limiting ball 18 moves to the other limiting groove 19, the second spring 17 is reset. In this way, under the cooperation of the limiting ball 18 and the limiting groove 19 , the protrusion 905 can be stably located in the transverse groove 110 , preventing the protrusion 905 from sliding out of the transverse groove 110 by itself and causing the pressing block 904 to release the cable 10 .

[0079] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0080] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0081] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0082] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0083] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0085] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0086] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0087] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An auxiliary device for quickly controlling the state of a loop, characterized in that: It comprises an encapsulation shell and a junction box, wherein the junction box is mounted on the encapsulation shell, and a relay and a mutual inductor are also mounted inside the encapsulation shell, wherein a normally closed contact switch on the relay connects a voltage circuit on the junction box, and a normally open contact switch on the relay connects a current circuit on the junction box; a current mutual inductor is connected in series in the current circuit; and a switch for controlling the normally closed contact switch and the normally open contact switch of the relay to disconnect and connect is mounted on the encapsulation shell.

2. The auxiliary device for fast control loop status according to claim 1, characterized in that: The relay includes a first relay and a second relay, and the mutual inductor includes a first mutual inductor and a second mutual inductor. The first relay and the first mutual inductor are located on one side of the junction box, and the second relay and the second mutual inductor are located on the other side of the junction box. The first relay and the second relay respectively control two pairs of phase voltage circuits and two-phase current circuits in the three-phase voltage.

3. The auxiliary device for fast control loop status according to claim 1, characterized in that: The junction box is provided with a voltage connection piece and a current connection piece, the voltage loop is connected to the normally closed contact switch of the relay via the voltage connection piece, and the current loop is connected to the normally open contact switch of the relay via the current connection piece.

4. An auxiliary device for fast control of loop status according to any one of claims 1 to 3, characterized in that: A display is installed on the packaging shell, and the display is used to monitor and display the current and voltage states in the current loop and the voltage loop.

5. The auxiliary device for fast control loop status according to claim 1, characterized in that: The junction box includes a box body, a wiring terminal is arranged in the box body, a plurality of wire inlet channels are opened on the box body, two ends of the plurality of wire inlet channels respectively pass through two sides of the box body, and the two ends of the wire inlet channels are respectively a wire inlet and a wire outlet; a plurality of vertical holes perpendicular to the plurality of wire inlet channels are opened on the box body; a clamping member for clamping or loosening the cables connected to the wire inlet channels is arranged in the vertical holes.

6. The auxiliary device for fast control loop status according to claim 5, characterized in that: The pressing member includes a pressing rod, a first spring and a pressing block, the pressing rod is located in the vertical hole and can move axially along the vertical hole, the pressing block is located below the pressing rod, and the first spring is connected between the pressing block and the pressing rod; a guide groove is provided on the inner side wall of the vertical hole, and the guide groove is an L-shaped groove. A protrusion is connected to one side of the pressing rod, and the protrusion is located in the L-shaped groove and can move along the vertical groove and the horizontal groove of the L-shaped groove. When the protrusion is located in the horizontal groove of the L-shaped groove, the pressing block is in a state of clamping the cable, and when the protrusion is located in the vertical groove of the L-shaped groove, the pressing block is in a state of loosening the cable.

7. The auxiliary device for fast control loop status according to claim 6, characterized in that: The clamping member further comprises a sleeve, the sleeve is located in the vertical hole and connected to the vertical hole, the pressure rod is inserted into the sleeve and can move axially along the sleeve; the guide groove is arranged on the inner side wall of the sleeve.

8. The auxiliary device for fast control loop status according to claim 7, characterized in that: The sleeve is detachably connected to the vertical hole.

9. The auxiliary device for fast control loop status according to claim 7, characterized in that: The top end of the pressure rod is connected with a pressure head, and the pressure head is vertically connected to the pressure rod.

10. The auxiliary device for fast control loop status according to claim 9, characterized in that: A plurality of limit grooves are provided at the top of the sleeve, and the plurality of limit grooves are evenly distributed along the circumference of the sleeve; at least two vertically arranged sliding holes are provided on the pressure head, and the bottom ends of the sliding holes pass through the bottom ends of the pressure head, and a sliding rod is provided in the sliding hole along its axial sliding, and a limiting ball is connected to the end of the sliding rod away from the pressure head, and the limiting ball is located in the limiting groove, and a second spring is provided between the limiting ball and the pressure head, and the second spring is sleeved on the outside of the sliding rod; when the pressure head is rotated to rotate the protrusion from the vertical groove of the L-shaped groove to the horizontal groove of the L-shaped groove, the limiting ball can be rotated to another adjacent limiting groove.

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