CN210984510U

CN210984510U - Waterproof open-close type current transformer

Info

Publication number: CN210984510U
Application number: CN201922008231.8U
Authority: CN
Inventors: 张辰
Original assignee: Tianjin Chenlong Electrical Equipment Co ltd
Current assignee: Tianjin Chenlong Electrical Equipment Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-10
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a waterproof formula open-close type current transformer relates to the technical field of electromagnetic induction equipment, including cyclic annular iron core, coil and casing, it has the insulating layer to fill between casing and the iron core, be provided with the binding post of being connected with the iron core electricity on the casing, be provided with the sealing device who is used for sealed binding post on the casing, the iron core includes the annular first iron core of semicircle and the second iron core of equalling footpath with it, the casing includes first casing and second casing, be provided with the fixing device who is used for holding fixed first casing and second casing tightly on the first casing, the open end rigid coupling of first casing has the plug bush, along the grafting adaptation in plug bush and the second casing. The utility model discloses an in plug bush and the second casing along pegging graft the adaptation improved the sealing waterproof performance between first casing and the second casing, sealing device further protects the binding post for current transformer waterproof performance is strong, be suitable for outdoor use.

Description

Waterproof open-close type current transformer

Technical Field

The utility model relates to a technical field of electromagnetic induction equipment especially relates to a waterproof formula open-close type current transformer.

Background

The current transformer is an instrument for converting a large primary side current into a small secondary side current according to the electromagnetic induction principle to measure, consists of a closed iron core and a winding, and has the function of converting a primary current with a larger value into a secondary current with a smaller value through a certain transformation ratio for protection, measurement and other purposes. Such as a current transformer with a transformation ratio of 400/5, can convert the current of 400A into 5A. The current transformer can be divided into a penetration current transformer, a pillar type current transformer, a sleeve type current transformer and a bus type current transformer according to the installation mode.

The patent publication No. CN204834329U discloses an indoor bus type open-close type electricity-taking current transformer, which comprises a variable current source, an insulating layer and a shell, wherein the shell is of a cylindrical structure with one open side, the variable current source is fixedly sealed in the shell through the insulating layer and is divided into two semicircular parts from the center, and the two semicircular parts divided by the variable current source are fixed into a whole through a steel belt and a locking head; the bus inner hole is provided with 3 clamping grooves, and 1 ohm ring is inserted into each clamping groove. The utility model discloses a can conveniently open and shut the mutual-inductor at any time, make it swiftly overlap on insulated cable, and can avoid appearing influencing output signal's phenomenon because of the eccentric magnetic field inequality that leads to of cross-core cable.

The technical scheme has the following problems: when being used for outdoors, the current transformer is in a full environment for a long time, often suffers from wind and rain, and the internal iron core is easy to corrode, so that the resistance of the iron core is increased to influence the precision of an output signal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a waterproof formula open-close type current transformer has higher water-proof effects.

The utility model discloses a can realize through following technical scheme:

a waterproof open-close type current transformer comprises an annular iron core, a coil arranged on the outer peripheral wall of the iron core and a shell coated on the periphery of the iron core, wherein an insulating layer is filled between the shell and the iron core, a connecting terminal electrically connected with the iron core is arranged on the shell, a sealing device used for sealing the connecting terminal is arranged on the shell, the iron core comprises a semicircular first iron core and a second iron core with the same diameter, the shell is made of silicon rubber and comprises a first shell and a second shell, a fixing device used for tightly holding and fixing the first shell and the second shell is arranged on the first shell, an inserting sleeve attached to the radial end of the first iron core is fixedly connected to the open end of the first shell, the inserting sleeve is matched with the inner edge of the second shell in an inserting manner, the radial end of the first iron core is flush with one end of the inserting sleeve far away from the first shell, the open end of the second shell protrudes beyond the radial end of the second core.

By adopting the technical scheme, the first shell and the second shell are sleeved on the peripheral side of the cable to be detected and then are mutually buckled, two plug bushes at two ends of the first shell are respectively inserted into two open ends of the second shell, at the moment, the first iron core and the second iron core are well contacted and sleeved on the peripheral wall of the cable to be detected to generate a stable electromagnetic induction signal, and the insert sleeve is inserted into the open end of the second housing to seal the joint of the first housing and the second housing to some extent, thereby avoided first iron core and second iron core to receive the influence of humid environment to produce the corrosion as far as possible for current transformer can be applicable to moist outdoor environment, and the first line casing and the second casing ageing resistance that the silicon rubber was made are strong, have guaranteed the compactness of first casing and second casing joint portion as far as possible, thereby guarantee its waterproof performance.

Further setting the following steps: and a sealing strip is arranged at the joint of the first shell and the plug bush.

Through adopting above-mentioned technical scheme, the setting of sealing strip has further improved the leakproofness of first casing with the second casing junction to guaranteed the life of first iron core and second iron core, effectively guaranteed current transformer's life promptly.

The sealing strip is further arranged to be in the shape of L, and after the first shell is buckled and connected with the second shell, the sealing strip is close to the horizontal end of the plug bush and is tightly propped against the inner side of the second shell.

Through adopting above-mentioned technical scheme, the sealing strip of "L" style of calligraphy makes first casing and second casing junction form the step, has further increased the degree of difficulty in the rainwater infiltration first casing or the second casing, has improved current transformer's waterproof performance.

Further setting the following steps: sealing device includes the rigid coupling and is in boss on the casing, binding post sets up on the boss, the grafting is connected with the buckler on the boss, the perforation has been seted up to the lateral wall of buckler, the inside wall rigid coupling of buckler have one end with the pipe that supports of boss butt, support intraductally wear to be equipped with one end with boss threaded connection's fixing bolt.

Through adopting above-mentioned technical scheme, when needing the electric current in the switch-on current transformer, pass through the perforation of buckler lateral wall with the wire and be connected with the binding post electricity, the buckler is pegged graft the adaptation with the boss and is passed through the fixing bolt rigid coupling on the boss for binding post is sealed in the buckler, has effectively guaranteed waterproof and the anticreep performance behind the current transformer switch-on wire.

Further setting the following steps: the waterproof cover is provided with an elastic sealing ring on the inner wall of the perforation.

Through adopting above-mentioned technical scheme, elastic sealing ring seals the wire of being connected with the binding post electricity, has further improved the leakproofness between buckler and the boss, and the waterproof protection to the binding post is stronger.

Further setting the following steps: the insulating layer is formed by pouring and curing liquid epoxy resin.

By adopting the technical scheme, the epoxy resin has excellent insulativity, inoxidizability and plasticity, can effectively ensure the insulativity of the iron core and the outside world by being poured between the iron core and the shell, and can well perform waterproof protection on the iron core.

Further setting the following steps: fixing device is including fixing the sleeve that first casing open end cambered surface periphery wall just set up along its axial, the second casing is close to telescopic one end be provided with the inserted bar of sleeve grafting adaptation, first casing is kept away from telescopic one end is provided with and is used for dismantling the connection first casing with the connecting piece of second casing.

Through adopting above-mentioned technical scheme, when installing current transformer, insert the inserted bar in the sleeve and rotatory first casing and second casing makes the mutual lock of the two and to waiting to detect the cable and carry out the centre gripping, rethread connecting piece is fixed first casing and second casing, has realized current transformer's convenient installation and dismantlement.

Further setting the following steps: the connecting piece includes the rigid coupling and is in take a seat and the rigid coupling on the first casing are in on the second casing and with take the hasp of seat overlap joint adaptation.

Through adopting above-mentioned technical scheme, first casing and second casing realize articulated the connection through inserted bar and telescopic plug-in connection, and detachable fixed is realized to rethread hasp and the overlap joint of taking the seat for current transformer is all comparatively convenient when installation and dismantlement.

Further setting the following steps: the connecting piece sets up two at least.

Through adopting above-mentioned technical scheme, a plurality of connecting pieces are fixed to provide effectual guarantee to the mutual lock of first casing and second casing, make first iron core and second iron core ability in close contact as far as possible, reduce because of the intermediate gap leads to between first iron core and the second iron core resistance increase influence testing result's possibility.

To sum up, the utility model discloses a beneficial technological effect does:

(1) after the first shell and the second shell are buckled and connected to the outer peripheral wall of the cable to be detected, the plug bush is inserted into the second shell to seal the first shell and the second shell, so that the waterproof property of the current transformer is improved, and the current transformer can be suitable for a humid outdoor environment;

(2) the sealing strip is arranged at the joint of the first shell and the inserting sleeve and is in a shape of L, so that the first shell and the second shell are connected more tightly, and the waterproof performance is stronger;

(3) the waterproof cover is in plug-in fit with the boss and is fixedly connected to the boss through the fixing bolt, so that the wiring terminal is sealed in the waterproof cover, and the waterproof and anti-creeping performance of the current transformer after being connected with a wire is effectively guaranteed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the overall structure of the utility model before installation.

Reference numerals: 1. an insulating layer; 2. a wiring terminal; 3. a first iron core; 4. a second iron core; 5. a first housing; 6. A second housing; 7. inserting a sleeve; 8. a sealing strip; 9. a boss; 10. a waterproof cover; 11. perforating; 12. abutting the pipe; 13. fixing the bolt; 14. an elastic sealing ring; 15. a sleeve; 16. inserting a rod; 17. setting up a seat; 18. a hasp is provided.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 and 2, for the utility model discloses a waterproof open-close type current transformer, including annular iron core, around establishing coil and the cladding at the iron core periphery wall at iron core outlying casing, it has insulating layer 1 to fill between casing and the iron core, insulating layer 1 forms for liquid epoxy pouring solidification, be provided with the binding post 2 of being connected with the iron core electricity on the casing, be provided with the sealing device who is used for sealed binding post 2 on the casing, the iron core includes the annular first iron core 3 of semicircle and the second iron core 4 of equalling diameter with it, the casing is made for silicon rubber and includes first casing 5 and second casing 6, be provided with the fixing device who is used for holding tightly fixed first casing 5 and second casing 6 on the first casing 5, the equal rigid coupling of both ends of first casing 5 has plug bush 7 with the laminating of the radial tip of first iron core 3, along the grafting adaptation in plug bush 7 and the second casing 6, the radial tip of first iron core 3 and the plug bush 7 keep away from the one end parallel and level of first casing 5, the open end of second casing 4's radial tip 4, the combination department of first casing 5 and the plug bush 7 department is provided with 358 sealing strip, the inboard sealing strip that the second casing is connected in the second casing 6, the back is the sealing strip, the sealing strip 358's sealing strip, the sealing strip.

The first shell 5 and the second shell 6 are sleeved on the outer peripheral side of a cable to be detected, the first shell 5 and the second shell 6 are buckled with each other, two plug bushes 7 at two ends of the first shell 5 are respectively inserted into two open ends of the second shell 6, at the moment, the first iron core 3 and the second iron core 4 are well contacted and sleeved on the outer peripheral wall of the cable to be detected, a stable electromagnetic induction signal can be generated, the plug bushes 7 are inserted into the open ends of the second shell 6 to seal the joint of the first shell 5 and the second shell 6 to a certain degree, so that the first iron core 3 and the second iron core 4 are prevented from being rusted due to the influence of a damp environment as far as possible, the current transformer can be suitable for a damp outdoor environment, the sealing performance of the joint of the first shell 5 and the second shell 6 is further improved due to the arrangement of the sealing strips 8, the sealing strips 8 in the shape of 'L' enable the joint of the first shell 5 and the second shell 6 to form steps, the difficulty in the infiltration into the first shell 5 or the second shell 6 is further increased, the waterproof performance of the first shell and the waterproof performance of the first shell 6 are guaranteed, and the ageing resistance of the first shell 6 are guaranteed, and the first shell 6 are not to be influenced by the ageing of the first shell 6.

Referring to fig. 1 and 2, sealing device includes boss 9 of rigid coupling on the casing, and binding post 2 sets up on boss 9, and the grafting is connected with buckler 10 on the boss 9, and perforation 11 has been seted up to the lateral wall of buckler 10, and buckler 10 is provided with elastic sealing ring 14 in perforation 11 inner wall, and the inside wall rigid coupling of buckler 10 has the pipe 12 that supports of one end and boss 9 butt, supports and wears to be equipped with one end and boss 9 threaded connection's fixing bolt 13 in the pipe 12.

When needing the electric current in the switch-on current transformer, pass through perforation 11 of buckler 10 lateral wall and be connected with binding post 2 electricity with the wire, elastic seal ring 14 seals the wire of being connected with binding post 2 electricity, further improved the leakproofness between buckler 10 and the boss 9, the waterproof protection to binding post 2 is stronger, buckler 10 and boss 9 grafting adaptation and through fixing bolt 13 rigid coupling on boss 9, make binding post 2 sealed in buckler 10, waterproof and anticreep performance behind the effective current transformer switch-on wire of having guaranteed.

Referring to fig. 1, the fixing device includes a sleeve 15 fixed on the outer peripheral wall of the arc surface of the opening end of the first casing 5 and axially arranged along the sleeve, an insertion rod 16 inserted with the sleeve 15 and adapted to be inserted is arranged at one end of the second casing 6 close to the sleeve 15, a connecting piece detachably connected with the first casing 5 and the second casing 6 is arranged at one end of the first casing 5 far away from the sleeve 15, the connecting piece is at least two, the connecting piece is two in the embodiment, and comprises a seat 17 fixedly connected to the first casing 5 and a hasp 18 fixedly connected to the second casing 6 and adapted to the seat 17.

When installing current transformer, insert inserted bar 16 in sleeve 15 and rotatory first casing 5 and second casing 6 make the two lock each other and to waiting to detect the cable and carry out the centre gripping, the detachable fixed of first casing 5 and second casing 6 is realized to rethread hasp 18 and the overlap joint of taking seat 17, it is all comparatively convenient when making current transformer install and dismantlement, and a plurality of connecting pieces are fixed to the mutual lock of first casing 5 and second casing 6 and provide effectual guarantee, make first iron core 3 and second iron core 4 ability in close contact with as far as possible, the reduction leads to the possibility that resistance increase influences the testing result between first iron core 3 and the second iron core 4 because of the middle clearance.

The above, only do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a waterproof formula open-close type current transformer, includes cyclic annular iron core, around establishing the coil and the cladding of iron core periphery wall are in iron core outlying casing, the casing with it has insulating layer (1) to fill between the iron core, be provided with on the casing with binding post (2) that the iron core electricity is connected, its characterized in that: the shell is provided with a sealing device for sealing the wiring terminal (2), the iron core comprises a semicircular annular first iron core (3) and a second iron core (4) with the same diameter as the semicircular annular first iron core, the shell is made of silicon rubber and comprises a first shell (5) and a second shell (6), the first shell (5) is provided with a fixing device used for holding and fixing the first shell (5) and the second shell (6), an inserting sleeve (7) which is attached to the radial end part of the first iron core (3) is fixedly connected to the opening end of the first shell (5), the plug bush (7) is in plug fit with the inner edge of the second shell (6), the radial end part of the first iron core (3) is flush with one end of the plug bush (7) far away from the first shell (5), the open end of the second housing (6) protrudes beyond the radial end of the second core (4).

2. The waterproof open-close type current transformer according to claim 1, characterized in that: and a sealing strip (8) is arranged at the joint of the first shell (5) and the plug bush (7).

3. The waterproof open-close type current transformer of claim 2, wherein the sealing strip (8) is shaped like L, and when the first shell (5) and the second shell (6) are buckled and connected, the horizontal end of the sealing strip (8) close to the plug bush (7) is abutted against the inner side of the second shell (6).

4. The waterproof open-close type current transformer according to claim 1, characterized in that: sealing device includes the rigid coupling and is in boss (9) on the casing, binding post (2) set up on boss (9), grafting connection has buckler (10) on boss (9), perforation (11) have been seted up to the lateral wall of buckler (10), the inside wall rigid coupling of buckler (10) have one end with the pipe (12) that supports of boss (9) butt, support wear to be equipped with in pipe (12) one end with boss (9) threaded connection's fixing bolt (13).

5. The waterproof open-close type current transformer according to claim 4, characterized in that: the waterproof cover (10) is provided with an elastic sealing ring (14) on the inner wall of the through hole (11).

6. The waterproof open-close type current transformer according to claim 1, characterized in that: the insulating layer (1) is formed by pouring and curing liquid epoxy resin.

7. The waterproof open-close type current transformer according to claim 1, characterized in that: fixing device is including fixing sleeve (15) that first casing (5) open end cambered surface periphery wall just set up along its axial, second casing (6) are close to the one end of sleeve (15) be provided with inserted bar (16) of sleeve (15) grafting adaptation, keep away from first casing (5) the one end of sleeve (15) is provided with and is used for dismantling the connection first casing (5) with the connecting piece of second casing (6).

8. The waterproof open-close type current transformer according to claim 7, characterized in that: the connecting piece includes that the rigid coupling is in take seat (17) and rigid coupling on first casing (5) are in on second casing (6) and with take hasp (18) of seat (17) overlap joint adaptation.

9. The waterproof open-close type current transformer according to claim 8, characterized in that: the connecting piece sets up two at least.