Modular current transformer

Abstract

The application relates to the technical field of electrical equipment, in particular to a modular current transformer which comprises a current transformer body, a mounting seat and a base, the current transformer body is installed on the mounting seat, and the base is pre-installed in a power distribution cabinet; a plug block and a plurality of suction cups are installed on the mounting seat, the base is provided with a plug slot and a plurality of water spraying units, the plug block is slidably inserted into the plug slot, the suction cups correspond to the water spraying units one by one, the water spraying units are extruded by the plug block in the process of inserting the plug block into the plug slot, and the water spraying units will spray water to the bottom of the suction cups after being extruded; after the plug block is completely inserted into the plug slot, the mounting seat will be pressed against the base, and the suction cups will be tightly sucked on the plane where the base is installed. The application has the beneficial effect that the installation and dismounting of the current transformer are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a modular current transformer. BACKGROUND

[0002] The current transformer is an instrument for converting primary side large current into secondary side small current for measurement according to the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. The primary side winding has few turns and is connected in series with the current line to be measured, so that the whole current of the line flows through it. The secondary side winding has many turns and is connected in series with the measuring instrument and the protection circuit.

[0003] At present, when the current transformer used in the low-voltage distribution cabinet is overhauled, the current transformer with parts to be replaced needs to be disassembled as a whole. Since the current transformer is usually fixed by bolts, the disassembly and assembly are relatively troublesome, and therefore improvement is needed. SUMMARY

[0004] In order to solve the above problems, the embodiment of the present application provides a modular current transformer, which facilitates the installation and disassembly of the current transformer.

[0005] In order to achieve the above purpose, the embodiment of the present application specifically adopts the following technical scheme: a modular current transformer, comprising a current transformer body, a mounting seat and a base, the current transformer body is installed on the mounting seat, and the base is pre-installed in a distribution cabinet;

[0006] The mounting seat is provided with a plug-in block and a plurality of suction cups, the base is provided with a plug-in slot and a plurality of water spraying units, the plug-in block is slidingly inserted into the plug-in slot, the suction cups correspond to the water spraying units one by one, the water spraying units are extruded by the plug-in block during the process of inserting the plug-in block into the plug-in slot, and the water spraying units will spray water to the bottom of the suction cups after being extruded;

[0007] When the plug-in block is completely inserted into the plug-in slot, the mounting seat will be pressed against the base, and the suction cups will be tightly sucked to the plane installed on the base.

[0008] Optionally, the base is provided with a mounting groove, the mounting groove is communicated with the plug-in slot, and the mounting groove penetrates the side of the base;

[0009] The water spraying unit comprises a sliding seat slidingly embedded in the mounting groove, a telescopic bellows is installed on the sliding seat, water is contained in the bellows, a fixed plate is installed at the end of the bellows away from the sliding seat and connected with a spray head through a connecting pipe, and the fixed plate is installed in the mounting groove;

[0010] The plug-in block is provided with a plurality of inclined guide surfaces, and the guide surfaces correspond to the sliding seats one by one;

[0011] The plug is pressed by the guide surface to press the sliding base, the sliding base is moved to press the corrugated pipe, water in the corrugated pipe is led into the nozzle through the connecting pipe, and the nozzle sprays water to the bottom of the suction cup.

[0012] Optionally, a middle part of the connecting pipe is sleeved with an elastic sleeve, and the middle part of the connecting pipe is closed when the elastic sleeve is in a natural state.

[0013] A one-way valve is arranged on the corrugated pipe, and the one-way valve is only used for gas or fluid to enter the corrugated pipe from outside.

[0014] Optionally, the sliding base is provided with a containing groove, a clamping block is slidably arranged in the containing groove, a sliding direction of the clamping block in the containing groove is perpendicular to a sliding direction of the plug in the slot, and the clamping block is connected to the sliding base through a first spring.

[0015] The plug is provided with a plurality of clamping grooves, and the clamping grooves correspond to the clamping blocks one by one.

[0016] In the process of inserting the plug into the slot, the plug is first pressed by the guide surface to press the sliding base, and then the clamping block is pressed into the containing groove through the guide surface, so that the first spring is deformed.

[0017] When the plug is completely inserted into the slot, the clamping grooves correspond to the clamping blocks, and the first spring returns to a natural state and makes the clamping blocks clamped in the clamping grooves.

[0018] Optionally, the clamping block is provided with an embedded groove, a pressing column is slidably arranged in the embedded groove, a sliding direction of the pressing column in the embedded groove is the same as a sliding direction of the plug in the slot, and the pressing column is connected to the clamping block through a second spring.

[0019] When the second spring is in a natural state, one end of the pressing column extends out of the embedded groove, and the end of the pressing column is in a hemispherical shape.

[0020] When the plug presses the clamping block into the containing groove through the guide surface, the pressing column is pressed into the embedded groove by the sliding base, and then the clamping block is completely sunk into the containing groove.

[0021] When the first spring returns to the natural state and makes the clamping blocks clamped in the clamping grooves, the second spring makes the pressing column tightly press the groove wall of the clamping groove, so that the mounting seat is tightly pressed on the base.

[0022] Optionally, the base is provided with a plurality of connecting channels communicated with the containing grooves, a plurality of first guide wheels are arranged at the connecting channels, a first pull rope is wound on the first guide wheels, one end of the first pull rope is connected to the clamping block, the other end of the first pull rope is connected with a sliding plate, and the sliding plate can slide the clamping block into the containing groove through the first pull rope.

[0023] Optionally, the suction cup is rotationally connected to the mounting seat, and the suction cup and the mounting seat are jointly connected with the same torsional spring.

[0024] When the nozzle sprays water to the bottom of the suction disc, the torsion spring will be in a natural state, and the bottom of the suction disc will be arranged in an inclined manner and directly face the nozzle;

[0025] During the process that the mounting seat is pressed against the base, the suction disc will be pressed and turned over by the plane on which the base is installed, so that the suction surface of the suction disc is attached to the plane on which the base is installed.

[0026] Optionally, the bottom of the mounting seat is provided with an avoiding groove, a plurality of second guide wheels are installed in the avoiding groove, a second pull rope is wound around the second guide wheels, one end of the second pull rope is connected to the edge of the suction disc, and a pull ring is connected to the other end of the second pull rope.

[0027] Optionally, an elastic push plate is installed on the second pull rope, and the slide plate is connected to the base through a third spring;

[0028] During the process that the suction surface of the suction disc is tightly attached to the plane on which the base is installed, the slide plate, the third spring and the first pull rope will enter the avoiding groove, the suction disc will drive the elastic push plate to push the slide plate to move through the second pull rope, until the third spring is compressed to the shortest state, at this time, the first pull rope will be in a relaxed state, the elastic push plate will be deformed and jump over the slide plate;

[0029] When the pull ring pulls the edge of the suction disc away from the plane on which the base is installed through the second pull rope, the second pull rope will push the slide plate to move through the elastic push plate, until the third spring is stretched to the longest state, at this time, the first pull rope will be in a tight state and pull the clamping block to sink into the accommodating groove.

[0030] The beneficial effects of the embodiments of the present application are:

[0031] 1. The worker only needs to take the mounting seat and insert the plug block into the plug groove completely, so that the water-stained suction disc is adsorbed and fixed on the plane on which the base is installed, the plug block is clamped and fixed in the plug groove, and the mounting seat is pressed on the base, thereby realizing the rapid installation of the current transformer;

[0032] 2. The worker only needs to pull the pull ring, so that the suction disc is separated from the plane on which the base is installed, the plug block is separated from the plug groove, and the mounting seat is separated from the base, thereby realizing the rapid disassembly of the current transformer;

[0033] 3. When the nozzle sprays water to the bottom of the suction disc, the torsion spring will be in a natural state, and the bottom of the suction disc will be arranged in an inclined manner and directly face the nozzle, so that the nozzle can uniformly spray water to the bottom of the suction disc, to ensure the adsorption effect of the suction disc on the plane on which the base is installed;

[0034] 4. The second pull rope can also push the sliding plate to move through the elastic push plate when the mounting rod is pulled to move, so that the suction cup can be separated from the plane where the base is installed, and the clamping block is separated from the clamping groove, so as to disassemble the current transformer. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure in the embodiment of the application;

[0036] Figure 2 is a schematic diagram of the sectional structure of the mounting seat and the base in the embodiment of the application;

[0037] Figure 3 is a schematic diagram of the sectional structure of the left end of the base in the embodiment of the application;

[0038] Figure 4 is a schematic diagram of the sectional structure of the left end of the mounting seat in the embodiment of the application;

[0039] Figure 5 is a schematic diagram of the structure of the top of the suction cup in the embodiment of the application;

[0040] Figure 6 is a schematic diagram of the structure of the bottom of the suction cup in the embodiment of the application.

[0041] The drawings show that: 1, the current transformer body; 2, the mounting seat; 21, the plug-in block; 211, the guide surface; 212, the clamping groove; 22, the suction cup; 221, the recessed cavity; 222, the mounting rod; 23, the torsional spring; 24, the avoiding groove; 25, the second guide wheel; 26, the second pull rope; 27, the pull ring; 28, the fourth spring; 29, the elastic push plate; 3, the base; 31, the plug-in slot; 32, the mounting slot; 33, the connecting channel; 34, the first guide wheel; 35, the first pull rope; 36, the sliding plate; 37, the third spring; 4, the water spraying unit; 41, the sliding seat; 411, the containing slot; 412, the clamping block; 413, the first spring; 414, the embedded slot; 415, the pressing column; 416, the second spring; 42, the corrugated pipe; 421, the connecting pipe; 422, the spray head; 423, the elastic sleeve; 424, the one-way valve; 425, the reset spring; 43, the buckle plate. DETAILED DESCRIPTION

[0042] The preferred embodiments of the application will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the application, and are not intended to limit the protection scope of the application.

[0043] Referring to Figures 1-6 , the embodiment of the application discloses a modular current transformer. As shown in Figure 1As shown, a modular current transformer includes a current transformer body 1, a mounting base 2 and a base 3. The current transformer body 1 is mounted on the mounting base 2, and the base 3 is pre-installed in the distribution cabinet by bolts or glue.

[0044] like Figure 2 As shown, an insert block 21 is installed on the side of the mounting base 2 facing the base 3, and a slot 31 is provided on the side of the base 3 facing the mounting base 2. The insert block 21 can be inserted into the slot 31, thereby realizing the initial connection between the mounting base 2 and the base 3; when the insert block 21 is fully inserted into the slot 31, the mounting base 2 will fit against the base 3, making it difficult for the mounting base 2 to shake relative to the base 3.

[0045] Several suction cups 22 are installed on the mounting seat 2, and a mounting groove 32 is provided on the base 3. The mounting groove 32 is connected to the slot 31. The mounting groove 32 and the slot 31 together form an inverted "T"-shaped groove, and the mounting groove 32 runs through both sides of the base 3; a number of water spray units 4 are provided in the mounting seat 2, and the suction cups 22 correspond to the water spray units 4 one by one.

[0046] like Figure 3 As shown, the water spray unit 4 includes a slide 41 that is slidably embedded in the mounting groove 32, and a retractable bellows 42 is installed on the slide 41. The bellows 42 is filled with water. A fixing plate is installed at one end of the bellows 42 away from the slide 41 and is connected to a nozzle 422 through a connecting pipe 421. The fixing plate is installed in the mounting groove 32 so that the bellows 42 remains stable.

[0047] like Figure 2 As shown, the insert 21 is provided with a plurality of inclined guide surfaces 211, which correspond one-to-one with the slide 41. As the insert 21 is inserted into the slot 31, the guide surfaces 211 squeeze the slide 41, which in turn squeezes the bellows 42. Water in the bellows 42 enters the nozzle 422 through the connecting pipe 421, and the nozzle 422 sprays water toward the bottom of the suction cup 22. When the suction cup 22 is attached to the surface on which the base 3 is mounted, water molecules fill the tiny gap between the suction cup 22 and the surface, forming a tighter seal. This effectively isolates air from entering, enhances the suction force of the suction cup 22 on the surface, and improves the stability of the current transformer body 1.

[0048] like Figure 3 As shown, it is worth noting that an elastic hoop 423 is provided in the middle of the connecting pipe 421. When the bellows 42 is not squeezed, the elastic hoop 423 will be in a natural state. At this time, the middle of the connecting pipe 421 will be closed to prevent water in the bellows 42 from leaking into the distribution cabinet.

[0049] like Figure 2 and Figure 3As shown, the one-way valve 424 is installed on the bellows 42, and only allows gas or fluid to enter the bellows 42 from outside, so that water in the bellows 42 cannot flow out of the one-way valve 424; when the plug 21 is separated from the slot 31, the bellows 42 will rebound due to its own elasticity, and external air will enter the bellows 42 through the one-way valve 424, so that the bellows 42 returns to the natural state; the reset spring 425 is arranged in the bellows 42, and the two ends of the reset spring 425 are connected to the inner walls of the two ends of the bellows 42, and the extension direction of the reset spring 425 is the same as the extension direction of the bellows 42, so that the bellows 42 is further facilitated to return to the natural state.

[0050] The buckle plate 43 is buckled at the notch of the mounting groove 32, and the nozzle 422 is arranged in and mounted on the buckle plate 43, which not only ensures the stability of the nozzle 422, but also avoids external foreign matters from entering the mounting groove 32.

[0051] As shown in Figure 2 and Figure 3 , the sliding seat 41 is provided with a containing groove 411, and the clamping block 412 is slidably arranged in the containing groove 411; the sliding direction of the clamping block 412 in the containing groove 411 is perpendicular to the sliding direction of the plug 21 in the slot 31, and the clamping block 412 is connected to the sliding seat 41 through the first spring 413, and the first spring 413 is located in the containing groove 411; the plug 21 is provided with a plurality of clamping grooves 212, and the clamping grooves 212 correspond to the clamping blocks 412 one by one, and the clamping block 412 can be slidably clamped into the clamping groove 212.

[0052] During the process of inserting the plug 21 into the slot 31, the plug 21 will first press the sliding seat 41 through the guide surface 211, so that the nozzle 422 sprays water on the bottom of the suction cup 22, and then the guide surface 211 will press the clamping block 412 into the containing groove 411, so that the first spring 413 is deformed; after the plug 21 is completely inserted into the slot 31, the clamping groove 212 will correspond to the clamping block 412, and the first spring 413 will return to the natural state and make the clamping block 412 clamped in the clamping groove 212, at this time, the plug 21 will be clamped and fixed in the slot 31, so as to improve the stability of the current transformer.

[0053] The clamping block 412 is provided with an embedded groove 414, and the pressing column 415 is slidably arranged in the embedded groove 414; the sliding direction of the pressing column 415 in the embedded groove 414 is the same as the sliding direction of the plug 21 in the slot 31, and the pressing column 415 is connected to the clamping block 412 through the second spring 416, and the second spring 416 is located in the embedded groove 414.

[0054] When the plug 21 is not inserted into the slot 31, the second spring 416 will be in the natural state, one end of the pressing column 415 will protrude out of the embedded groove 414, and the end of the pressing column 415 is hemispherical.

[0055] When the plug 21 presses the clamping block 412 into the accommodating groove 411 through the guide surface 211, the hemispherical end of the pressing column 415 will be pressed into the embedding groove 414 by the sliding seat 41, at this time, the second spring 416 will be in a compressed state, then the clamping block 412 will be completely sunk into the accommodating groove 411; when the clamping groove 212 corresponds to the clamping block 412, the first spring 413 clamps the clamping block 412 in the clamping groove 212, the second spring 416 will press the pressing column 415 against the groove wall of the clamping groove 212, so that the mounting seat 2 is pressed against the base 3, thereby further improving the stability of the current transformer.

[0056] As shown in Figure 3 , the base 3 is provided with a plurality of connecting channels 33 communicated with the accommodating groove 411, a plurality of first guide wheels 34 are installed at the connecting channels 33, a first pull rope 35 is wound around the first guide wheels 34, one end of the first pull rope 35 is connected to the clamping block 412, the other end of the first pull rope 35 is connected with a sliding plate 36, the sliding plate 36 can pull the clamping block 412 to slide and sink into the accommodating groove 411 through the first pull rope 35, so that the plug 21 is separated from the plug groove 31, which facilitates the disassembly of the current transformer body 1 and the mounting seat 2 from the base 3.

[0057] As shown in Figure 4 and Figure 5 , it is worth noting that the suction cup 22 is rotationally connected to the mounting seat 2, and the suction cup 22 and the mounting seat 2 are jointly connected with the same torsional spring 23. When the nozzle 422 sprays water to the bottom of the suction cup 22, the torsional spring 23 will be in a natural state, the bottom of the suction cup 22 will be inclined and directly facing the nozzle 422, so that the nozzle 422 can uniformly spray water to the bottom of the suction cup 22; then the mounting seat 2 will be pressed against the base 3, the suction cup 22 will be squeezed and turned over by the plane installed on the base 3, the torsional spring 23 will be deformed, and the suction surface of the suction cup 22 will be attached to the plane installed on the base 3, so as to ensure the suction effect of the suction cup 22 on the plane installed on the base 3.

[0058] As shown in Figure 5 and Figure 6 , the suction surface of the suction cup 22 is provided with a recess 221, and a mounting rod 222 is fixedly embedded in the recess 221, one end of the mounting rod 222 extends to the edge of the suction cup 22; the bottom of the mounting seat 2 is provided with an avoiding groove 24, a plurality of second guide wheels 25 are installed in the avoiding groove 24, a second pull rope 26 is wound around the second guide wheels 25, one end of the second pull rope 26 is connected to the end of the mounting rod 222 extending to the edge of the suction cup 22, and the other end of the second pull rope 26 is connected with a pull ring 27. By pulling the pull ring 27, the second pull rope 26 can move the mounting rod 222, the mounting rod 222 will lift the edge of the suction cup 22, so that the external air can quickly enter between the suction cup 22 and the plane installed on the base 3, so as to take the suction cup 22 off from the plane.

[0059] As shown in Figure 4 The pull ring 27 is connected to the mounting base 2 through a fourth spring 28, which is arranged to keep the pull ring 27 stable and prevent it from shaking randomly when not in use.

[0060] As shown in Figures 2 to 4 It is worth mentioning that the second pull rope 26 is provided with an elastic push plate 29, and the sliding plate 36 is connected to the base 3 through a third spring 37. During the process of the suction surface of the suction cup 22 being tightly attached to the plane on which the base 3 is installed, the sliding plate 36, the third spring 37, and the first pull rope 35 will enter the avoiding groove 24, so that the mounting base 2 is pressed against the base 3, and the suction cup 22 will drive the elastic push plate 29 to push the sliding plate 36 to move until the third spring 37 is compressed to the shortest state, at which time the first pull rope 35 will be in a relaxed state, and the elastic push plate 29 will be deformed and jump over the sliding plate 36.

[0061] When the pull ring 27 pulls the edge of the suction cup 22 away from the plane on which the base 3 is installed through the second pull rope 26, the second pull rope 26 will drive the sliding plate 36 to move through the elastic push plate 29 until the third spring 37 is stretched to the longest state, at which time the first pull rope 35 will be in a tight state and pull the clamping block 412 to sink into the accommodating groove 411, and the worker can make the plug 21 disengage from the plug groove 31 and make the mounting base 2 disengage from the base 3 by continuing to pull the pull ring 27.

[0062] The working principle of the present application is as follows: during the installation process of the current transformer body 1, the worker will take the mounting base 2 and insert the plug 21 into the plug groove 31, the plug 21 will press the sliding seat 41 through the guide surface 211, the sliding seat 41 will move and press the corrugated pipe 42, the water in the corrugated pipe 42 will enter the nozzle 422 through the connecting pipe 421, and the nozzle 422 will spray water to the bottom of the suction cup 22; then the guide surface 211 will press the clamping block 412 into the accommodating groove 411, and the hemispherical end of the pressing column 415 will be pressed into the embedded groove 414 by the sliding seat 41.

[0063] When the plug 21 is completely inserted into the plug groove 31, the mounting base 2 will be pressed against the base 3, the side of the suction cup 22 that is sprayed will be adsorbed and fixed on the plane on which the base 3 is installed, at the same time, the clamping groove 212 will correspond to the clamping block 412, the first spring 413 will return to the natural state and make the clamping block 412 clamped in the clamping groove 212, and the second spring 416 will press the pressing column 415 against the groove wall of the clamping groove 212, so that the mounting base 2 is pressed against the base 3, thereby improving the stability of the current transformer.

[0064] During the dismounting process of the current transformer body 1, the worker will pull all the pull rings 27, the pull rings 27 will pull the edge of the suction cup 22 through the second pull rope 26 to be separated from the plane on which the base 3 is installed, and the second pull rope 26 will push the sliding plate 36 to move through the elastic push plate 29 until the third spring 37 is stretched to the longest state, at which time the first pull rope 35 will be in a tight state and pull the clamping block 412 to sink into the accommodating groove 411; then the worker can make the plug block 21 separate from the plug groove 31 and make the mounting seat 2 separate from the base 3 by continuing to pull the pull ring 27, so as to realize the dismounting of the current transformer.

[0065] As described above, the worker only needs to take the mounting seat 2 and insert the plug block 21 into the plug groove 31 completely, so that the wet suction cup 22 is adsorbed and fixed on the plane on which the base 3 is installed, the plug block 21 is clamped and fixed in the plug groove 31, and the mounting seat 2 is pressed on the base 3, thereby realizing the quick installation of the current transformer; the worker only needs to pull the pull ring 27, so that the suction cup 22 is separated from the plane on which the base 3 is installed, the plug block 21 is separated from the plug groove 31, and the mounting seat 2 is separated from the base 3, thereby realizing the quick dismounting of the current transformer.

[0066] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0067] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0068] The term "comprising" or any other similar word is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in the process, article or equipment / device.

[0069] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A modular current transformer, characterized by, The current transformer body (1), the mounting seat (2) and the base (3), the current transformer body (1) is installed on the mounting seat (2), the base (3) is preinstalled in the power distribution cabinet, The mounting seat (2) is provided with a plurality of suction cups (22), and the base (3) is provided with a plurality of water spraying units (4), the suction cups (22) correspond to the water spraying units (4) one by one, the water spraying units (4) are extruded by the plug-in block (21) in the process of being inserted into the slot (31), and the water spraying units (4) spray water to the bottom of the suction cup (22) after being extruded; When the plug-in block (21) is completely inserted into the slot (31), the mounting seat (2) is pressed against the base (3), and the suction cup (22) is tightly sucked on the plane on which the base (3) is installed, The base (3) is provided with a mounting groove (32), the mounting groove (32) is communicated with the slot (31), and the mounting groove (32) penetrates the side of the base (3); The water spraying unit (4) comprises a sliding seat (41) slidably embedded in the mounting groove (32), a telescopic bellows (42) mounted on the sliding seat (41), water contained in the bellows (42), a fixed plate mounted on one end of the bellows (42) away from the sliding seat (41) and connected with a spray head (422) through a connecting pipe (421), and the fixed plate is mounted in the mounting groove (32); The plug-in block (21) is provided with a plurality of inclined guide surfaces (211), and the guide surfaces (211) correspond to the sliding seats (41) one by one; In the process of being inserted into the slot (31), the plug-in block (21) extrudes the sliding seat (41) through the guide surface (211), the sliding seat (41) moves to extrude the bellows (42), the water in the bellows (42) enters the spray head (422) through the connecting pipe (421), and the spray head (422) sprays water to the bottom of the suction cup (22), The middle part of the connecting pipe (421) is sleeved with an elastic sleeve (423), and when the elastic sleeve (423) is in a natural state, the middle part of the connecting pipe (421) is closed; The bellows (42) is provided with a one-way valve (424), and the one-way valve (424) only allows gas or fluid to enter the bellows (42) from the outside of the bellows (42).

2. A modular current transformer according to claim 1, characterized in that The sliding seat (41) is provided with a containing groove (411), a clamping block (412) is slidably embedded in the containing groove (411), the sliding direction of the clamping block (412) in the containing groove (411) is perpendicular to the sliding direction of the plug-in block (21) in the slot (31), and the clamping block (412) is connected to the sliding seat (41) through a first spring (413); The plug-in block (21) is provided with a plurality of clamping grooves (212), and the clamping grooves (212) correspond to the clamping blocks (412) one by one; In the process of being inserted into the slot (31), the plug-in block (21) first extrudes the sliding seat (41) through the guide surface (211), and then the clamping block (412) is pressed into the containing groove (411) through the guide surface (211), so that the first spring (413) is deformed; When the plug (21) is completely inserted into the slot (31), the clamping groove (212) will correspond to the clamping block (412), the first spring (413) will return to the natural state and make the clamping block (412) clamped in the clamping groove (212).

3. A modular current transformer according to claim 2, wherein, The clamping block (412) is provided with an embedding groove (414), and a pressing column (415) is slidingly embedded in the embedding groove (414). The sliding direction of the pressing column (415) in the embedding groove (414) is the same as the sliding direction of the plug (21) in the slot (31), and the pressing column (415) is connected to the clamping block (412) through a second spring (416). When the second spring (416) is in the natural state, one end of the pressing column (415) will protrude out of the embedding groove (414), and the end of the pressing column (415) is provided in a hemispherical shape. When the plug (21) presses the clamping block (412) into the accommodating groove (411) through the guide surface (211), the pressing column (415) will be pressed into the embedding groove (414) by the sliding seat (41), and then the clamping block (412) will be completely sunk into the accommodating groove (411). When the first spring (413) returns to the natural state and makes the clamping block (412) clamped in the clamping groove (212), the second spring (416) will press the pressing column (415) tightly against the groove wall of the clamping groove (212), so that the mounting seat (2) is pressed tightly on the base (3).

4. A modular current transformer according to claim 3, wherein, The base (3) is provided with a plurality of connecting channels (33) communicating with the accommodating groove (411), a plurality of first guide wheels (34) are installed at the connecting channels (33), a first pull rope (35) is wound around the first guide wheels (34), one end of the first pull rope (35) is connected to the clamping block (412), and the other end of the first pull rope (35) is connected with a sliding plate (36). The sliding plate (36) can pull the clamping block (412) to slide and sink into the accommodating groove (411) through the first pull rope (35).

5. A modular current transformer according to claim 4, wherein, The suction disc (22) is rotationally connected to the mounting seat (2), and the suction disc (22) and the mounting seat (2) are jointly connected with the same torsional spring (23). When the nozzle (422) sprays water towards the bottom of the suction disc (22), the torsional spring (23) will be in the natural state, and the bottom of the suction disc (22) will be inclined and directly facing the nozzle (422). During the process of the mounting seat (2) being pressed tightly on the base (3), the suction disc (22) will be extruded and turned over by the plane installed on the base (3), so that the suction surface of the suction disc (22) is attached to the plane installed on the base (3).

6. A modular current transformer according to claim 5, wherein, The bottom of the mounting seat (2) is provided with an avoiding groove (24), and a plurality of second guide wheels (25) are installed in the avoiding groove (24). A second pull rope (26) is wound around the second guide wheels (25), one end of the second pull rope (26) is connected to the edge of the suction disc (22), and the other end of the second pull rope (26) is connected with a pull ring (27).

7. A modular current transformer according to claim 6, wherein, An elastic push plate (29) is installed on the second pull rope (26), and the sliding plate (36) is connected to the base (3) through a third spring (37). In the process of the suction surface of the suction cup (22) being tightly attached to the plane on which the base (3) is installed, the slide plate (36), the third spring (37) and the first pull rope (35) will enter the avoiding groove (24), the suction cup (22) will drive the elastic push plate (29) to push the slide plate (36) to move through the second pull rope (26), until the third spring (37) is compressed to the shortest state, at this time the first pull rope (35) will be in a relaxed state, the elastic push plate (29) will be deformed and jump over the slide plate (36); When the pull ring (27) pulls the edge of the suction cup (22) away from the plane on which the base (3) is installed through the second pull rope (26), the second pull rope (26) will push the slide plate (36) to move through the elastic push plate (29), until the third spring (37) is stretched to the longest state, at this time the first pull rope (35) will be in a tight state and pull the clamping block (412) to sink into the containing groove (411).

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