CN218767068U - Joint structure of corrugated pipe for Rogowski coil - Google Patents

Abstract

The utility model discloses a joint structure of corrugated pipe for Rogowski coil, which comprises a joint component connected between two ends of the corrugated pipe, wherein the joint component comprises a first pipe clamp, a second pipe clamp, an axial compression nut, a first compression module and a second compression module; the front end section of the first pipe clamp is provided with external threads, the middle excircle of the second pipe clamp is provided with an annular outer convex shoulder, and the front end section of the second pipe clamp is inserted into the front end inner hole of the first pipe clamp and then mutually fixed by an axial compression nut sleeved on the rear end section excircle of the second pipe clamp; the first pipe clamp is provided with a cable leading-out space. The utility model discloses peg graft convenient and reliable, improved life-span and measurement accuracy of luo shi coil under high temperature environment.

Description

Joint structure of corrugated pipe for Rogowski coil

Technical Field

The utility model relates to a luo shi coil technical field, concretely relates to joint structure for luo shi coil's bellows.

Background

The Rogowski coil is an annular spiral coil uniformly wound on a non-ferromagnetic material, is used for measuring the current on a power frequency circuit, and has the advantages of simple structure, light weight and difficulty in saturation under large current. The Rogowski coil does not contain ferromagnetic materials, has no hysteresis effect, almost zero phase error and no magnetic saturation phenomenon, so that the measuring range can be from a plurality of amperes to hundreds of kiloamperes of current, direct circuit connection does not exist between the measuring range and the current to be measured, and the response frequency band is wide from 0.1Hz to 1MHz. The output of the Rogowski coil is the change rate of the measured current, and the voltage which is proportional to the measured current can be restored by adopting an integrator.

For the application occasions needing to carry out current measurement in a high-temperature thermal radiation measurement environment, the Rogowski coil with a conventional structure is easy to age or damage under the influence of high-temperature thermal radiation, so that the service life of the Rogowski coil is greatly reduced; in addition, the measurement accuracy of the rogowski coil is also affected by high-temperature heat radiation.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the present invention provides a joint structure for a bellows of a rogowski coil, which aims to improve the service life and the measurement accuracy of the rogowski coil in a high-temperature use environment. The specific technical scheme is as follows:

a joint structure of a corrugated pipe for a Rogowski coil comprises the corrugated pipe sleeved outside the Rogowski coil and a joint assembly connected between two ends of the corrugated pipe, wherein the joint assembly comprises a first pipe clamp used for connecting one end of the corrugated pipe, a second pipe clamp used for connecting the other end of the corrugated pipe, an axial compression nut used for fixedly connecting the front end of the first pipe clamp and the front end of the second pipe clamp, a first compression module arranged at the tail end of the first pipe clamp and a second compression module arranged at the tail end of the second pipe clamp, one end of the corrugated pipe is clamped and fixed through the first compression module after being inserted into an inner hole of the first pipe clamp, and the other end of the corrugated pipe is clamped and fixed through the second compression module after being inserted into an inner hole of the second pipe clamp; the front end section of the second pipe clamp is inserted into the inner hole of the front end of the first pipe clamp and then fixed with each other through the axial compression nut sleeved on the excircle of the section of the rear end of the second pipe clamp; wherein the first pipe clamp is provided with a cable leading-out space for leading out a connector lug of the Rogowski coil which is arranged in the corrugated pipe to the outside.

Preferably, the first pressing module comprises a pair of arc-shaped pressing plates which are oppositely clamped up and down through screws, and the pair of arc-shaped pressing plates comprises an upper arc-shaped pressing plate and a lower arc-shaped pressing plate; the lower arc-shaped pressing plate is integrally connected to the lower side of the tail end hole of the first pipe clamp.

Preferably, the arc pressing surface of the arc pressing plate is provided with a positioning clamping groove for clamping a corrugated boss on the corrugated pipe.

In the utility model, the second compressing module comprises a pair of half clamping sleeves, a section of small round pipe is formed at the front end of the half clamping sleeves after the half clamping sleeves are spliced, a section of big round pipe is formed at the rear end of the half clamping sleeves, the inner hole of the small round pipe has the same diameter as that of the inner hole of the big round pipe, and the small round pipe and the big round pipe are mutually integrated and coaxially butted; the annular clamping groove that a plurality of quantity is used for blocking ripple bellying on the bellows is seted up on the hole surface of little pipe and big pipe, the excircle of little pipe is including setting up one section cylinder excircle, the setting of little pipe front end are in one section circular cone excircle of little pipe rear end, cylinder excircle grafting location is in the hole of second pipe clamp, circular cone excircle chucking is at the hole drill way position of above-mentioned second pipe clamp.

Preferably, the adjacent butt joint department of little pipe with big pipe forms a step face the position that leans on the step face little pipe has seted up annular slot along circumference.

Preferably, the pair of half jackets clamp the corrugated pipe and then are permanently fixed between the half abutting surfaces of the pair of half jackets through glue.

In order to facilitate connection, an outer hexagonal flange is arranged on the outer circle of the first pipe clamp and close to the tail end of the outer thread of the first pipe clamp.

In order to facilitate the Rogowski coil connector lug to be led out from the interior of the corrugated pipe, an inner hole of the first pipe clamp is a special-shaped hole, the cross-sectional profile of the special-shaped hole is formed by two end parts of a section of arc-shaped profile and two end parts of a section of V-shaped profile in a butt joint mode, and the tip part of the V-shaped profile is provided with a transition arc; wherein one end of the corrugated tube is positioned on the arc-shaped profile of the profiled hole, the cable lead-out space being formed between the section of the V-shaped profile and the corrugated tube.

Preferably, an inclined surface is arranged at an upper side hole opening part of the tail end of the first pipe clamp, and the inclined surface inclines towards a direction far away from the upper arc-shaped pressing plate so as to prevent a connector lug outgoing line of the rogowski coil from interfering with the upper arc-shaped pressing plate.

A joining method of a joining structure of a corrugated tube for a rogowski coil, characterized by comprising the steps of:

(1) The Rogowski coil is arranged in an inner hole of the corrugated pipe;

(2) One end of the corrugated pipe is inserted into the first pipe clamp, the corrugated protrusion on the corrugated pipe is positioned in the positioning clamping groove of the lower arc-shaped pressing plate at the tail end of the first pipe clamp, and the upper arc-shaped pressing plate and the lower arc-shaped pressing plate are vertically abutted and fixed through screws; during operation, the connector lug of the Rogowski coil is led out from the cable lead-out space;

(3) Inserting a second pipe clamp into an inner hole at the front end of the first pipe clamp, and screwing and fixing the second pipe clamp by using an axial compression nut;

(4) Clamping the other end of the corrugated pipe by a pair of half jackets, and positioning the corrugated bulges on the corrugated pipe into an annular clamping groove of the half jackets; when the pair of half clamping sleeves are clamped oppositely, glue is used for fixing between the half butting surfaces;

(5) During measurement, the corrugated pipe is integrally bent into a ring shape to surround an electric wire to be measured, then a small circular pipe on a half jacket at the end part of the corrugated pipe is inserted into an inner hole at the rear end of a second pipe clamp, so that a cylindrical outer circle on the small circular pipe is positioned in the inner hole of the second pipe clamp, and a conical outer circle on the small circular pipe and the inner hole at the rear end of the second pipe clamp are mutually locked, thereby forming a joint structure between the two end parts on the corrugated pipe.

The beneficial effects of the utility model are that:

first, the utility model discloses a joint structure for luo shi coil's bellows, through the outside overcoat bellows at luo shi coil, the wall thickness of bellows can be done thickly (the thick wall bellows still has better ground bendability) to can effectively shield the adverse effect of high temperature heat radiation to luo shi coil, thereby improve luo shi coil's life-span and measurement accuracy under high temperature service environment.

Second, the utility model discloses a joint structure for bellows of luo shi coil, special design's the joint structure who comprises first pipe clamp, second pipe clamp, axial gland nut, arc clamp plate and huff clamp cover, its location is connected reliably, is pegged graft conveniently, has improved measuring efficiency from this.

Drawings

Fig. 1 is a schematic view of a coupling structure of a bellows for a rogowski coil of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a schematic view of the construction of the axial compression nut;

FIG. 4 is a schematic view of the first clamp;

fig. 5 is a left side view of fig. 4.

In the figure: 1. the corrugated pipe comprises a corrugated pipe body, 2, a joint component, 3, one end of the corrugated pipe body, 4, a first pipe clamp, 5, the other end of the corrugated pipe body, 6, a second pipe clamp, 7, an axial compression nut, 8, a first compression module, 9, a second compression module, 10, external threads, 11, an annular outer convex shoulder, 12, an annular inner convex shoulder, 13, a cable leading-out space, 14, an arc-shaped pressing plate, 15, an upper arc-shaped pressing plate, 16, a lower arc-shaped pressing plate, 17, a positioning clamping groove, 18, a half clamping sleeve, 19, a small circular tube, 20, a large circular tube, 21, an annular clamping groove, 22, a cylindrical outer circle, 23, a conical outer circle, 24, a step surface, 25, an annular groove, 26, an outer hexagonal flange, 27, a special-shaped hole, 28, an arc-shaped contour, 29, a V-shaped contour, 30, a transition circular arc, 31 and an inclined surface.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1:

fig. 1 to 5 show an embodiment of a joint structure for a corrugated tube of a rogowski coil according to the present invention, which includes a corrugated tube 1 externally sleeved on a rogowski coil (not shown in the drawings) and a joint assembly 2 connected between two ends of the corrugated tube 1, where the joint assembly 2 includes a first tube clamp 4 for connecting one end 3 of the corrugated tube, a second tube clamp 6 for connecting the other end 5 of the corrugated tube, an axial compression nut 7 for fixedly connecting a front end of the first tube clamp 4 and a front end of the second tube clamp 6 to each other, a first compression module 8 disposed at a tail end of the first tube clamp 4, and a second compression module 9 disposed at a tail end of the second tube clamp 6, where one end of the corrugated tube 1 is inserted into an inner hole of the first tube clamp 4 and then is clamped and fixed by the first compression module 8, and the other end of the corrugated tube 1 is inserted into an inner hole of the second tube clamp 6 and then is clamped and fixed by the second compression module 9; an external thread 10 is arranged on a front end section of the first pipe clamp 4, an annular outer convex shoulder 11 is arranged on a middle excircle of the second pipe clamp 6, an annular inner convex shoulder 12 is arranged at one end of a thread inner hole of the axial compression nut 7, and the first pipe clamp 4 and the second pipe clamp 6 are fixed with each other through the axial compression nut 7 sleeved on a rear end section of the excircle of the second pipe clamp 6 after the front end section of the second pipe clamp 6 is inserted into the front end inner hole of the first pipe clamp 4; wherein the first pipe clamp 4 is provided with a cable lead-out space 13 for leading out a connector lug of the rogowski coil installed in the corrugated pipe 1 to the outside.

Preferably, the first pressing module 8 comprises a pair of arc-shaped pressing plates 14 which are clamped up and down by screws, and the pair of arc-shaped pressing plates 14 comprises an upper arc-shaped pressing plate 15 and a lower arc-shaped pressing plate 16; wherein, the lower arc-shaped pressing plate 16 is integrally connected to the lower side part of the tail end hole of the first pipe clamp 4.

Preferably, the arc pressing surface of the arc pressing plate 14 is provided with a positioning clamping groove 17 for clamping the corrugated convex part on the corrugated pipe 1.

In the utility model, the second compressing module 9 comprises a pair of half clamping sleeves 18, a section of small round pipe 19 is formed at the front end of the half clamping sleeves 18 after the half clamping sleeves are spliced, a section of big round pipe 20 is formed at the rear end of the half clamping sleeves, and the inner hole of the small round pipe 19 is the same as the inner hole of the big round pipe 20 in diameter and is in mutual integrated coaxial butt joint; the ring groove 21 that a plurality of quantity were used for blocking ripple bellying on bellows 1 is seted up on the hole surface of little pipe 19 and big pipe 20, the excircle of little pipe 19 is including setting up one section cylinder excircle 22, the setting of 19 front ends of little pipe are in one section circular cone excircle 23 of 19 rear ends of little pipe, cylinder excircle 22 is pegged graft and is fixed a position in the hole of second pipe clamp 6, the chucking of circular cone excircle 23 is at the hole drill way position of above-mentioned second pipe clamp 6.

Preferably, a step surface 24 is formed at the adjacent butt joint of the small circular tube 19 and the large circular tube 20, and an annular groove 25 is formed in the step surface 24 at the position close to the small circular tube 19 along the circumferential direction.

Preferably, the pair of half jackets 18 clamp the corrugated pipe 1 and then are permanently fixed between the half butting faces of the pair of half jackets 18 by glue.

For the convenience of connection, an external hexagonal flange 26 is provided on the external circle of the first pipe clamp 4 at a position close to the external threaded tail end of the first pipe clamp 4.

In order to facilitate the rogowski coil connector lug to be led out from the interior of the corrugated pipe 1, the inner hole of the first pipe clamp 4 is a special-shaped hole 27, the cross-sectional profile of the special-shaped hole 27 is defined by two end parts of a section of arc-shaped profile 28 and two end parts of a section of V-shaped profile 29 which are in butt joint, and the tip part of the V-shaped profile 29 is provided with a transition arc 30; wherein one end of the corrugated tube 1 is positioned on the arc-shaped profile 28 of the profiled hole 27, the cable lead-out space 13 being formed between the length of the V-shaped profile 29 and the corrugated tube 1.

Preferably, an inclined surface 31 is provided at an upper opening portion of the tail end of the first pipe clamp 4, and the inclined surface 31 is inclined in a direction away from the upper arc-shaped pressing plate 15 to prevent the terminal lead of the rogowski coil from interfering with the upper arc-shaped pressing plate 15.

Example 2:

a joining method using the joining structure of the corrugated tube for a rogowski coil of embodiment 1, characterized by comprising the steps of:

(1) A Rogowski coil is arranged in an inner hole of the corrugated pipe 1;

(2) One end of the corrugated pipe 1 is inserted into the first pipe clamp 4, the corrugated bulge on the corrugated pipe 1 is positioned in a positioning clamping groove 17 of a lower arc-shaped pressing plate 16 at the tail end of the first pipe clamp 4, and the upper arc-shaped pressing plate 15 and the lower arc-shaped pressing plate 16 are vertically involuted and fixed by screws; during operation, the connector lug of the Rogowski coil is led out from the cable lead-out space 13;

(3) Inserting a second pipe clamp 6 into an inner hole at the front end of the first pipe clamp 4, and screwing and fixing the second pipe clamp by using an axial compression nut 7;

(4) Clamping the other end of the corrugated pipe 1 by using a pair of half jackets 18, and positioning the corrugated bulges on the corrugated pipe 1 into annular clamping grooves 21 of the half jackets 18; when the pair of half clamping sleeves 18 are clamped, glue is used for fixing between half butt joint surfaces;

(5) During measurement, the corrugated pipe 1 is integrally bent into a ring shape to surround an electric wire to be measured, then the small round pipe 19 on the half jacket 18 at the end part of the corrugated pipe 1 is inserted into the inner hole at the rear end of the second pipe clamp 6, so that the cylindrical outer circle 22 on the small round pipe 19 is positioned in the inner hole of the second pipe clamp 6, and the conical outer circle 23 on the small round pipe 19 and the inner hole at the rear end of the second pipe clamp 6 are locked with each other, thereby forming a joint structure between the two end parts on the corrugated pipe 1.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and embellishments can be made without departing from the technical principle of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.

Claims (9)

1. A joint structure of a corrugated pipe for a Rogowski coil is characterized by comprising a corrugated pipe sleeved outside the Rogowski coil and a joint assembly connected between two ends of the corrugated pipe, wherein the joint assembly comprises a first pipe clamp used for connecting one end of the corrugated pipe, a second pipe clamp used for connecting the other end of the corrugated pipe, an axial compression nut used for fixedly connecting the front end of the first pipe clamp with the front end of the second pipe clamp, a first compression module arranged at the tail end of the first pipe clamp and a second compression module arranged at the tail end of the second pipe clamp, one end of the corrugated pipe is clamped and fixed through the first compression module after being inserted into an inner hole of the first pipe clamp, and the other end of the corrugated pipe is clamped and fixed through the second compression module after being inserted into an inner hole of the second pipe clamp; the front end section of the second pipe clamp is inserted into the inner hole of the front end of the first pipe clamp and then fixed with each other through the axial compression nut sleeved on the excircle of the section of the rear end of the second pipe clamp; wherein the first pipe clamp is provided with a cable leading-out space for leading out a connector lug of the Rogowski coil which is arranged in the corrugated pipe to the outside.

2. A coupling structure for a corrugated tube of a rogowski coil according to claim 1, wherein the first compression module includes a pair of arc-shaped pressing plates that are clamped up and down against each other by screws, the pair of arc-shaped pressing plates including an upper arc-shaped pressing plate and a lower arc-shaped pressing plate; the lower arc-shaped pressing plate is integrally connected to the lower side portion of the tail end hole of the first pipe clamp.

3. A joint structure of corrugated pipes for rogowski coils according to claim 2, wherein the arc pressing surface of the arc pressing plate is provided with a positioning catch groove for catching a corrugated boss portion on the corrugated pipe.

4. The joint structure of a corrugated tube for a rogowski coil according to claim 1, wherein the second pressing module comprises a pair of huff clamps, the pair of huff clamps form a section of small round tube at the front end and a section of large round tube at the rear end after being spliced, and the inner hole of the small round tube has the same diameter as the inner hole of the large round tube and is integrally and coaxially butted with each other; the annular clamping groove that a plurality of quantity is used for blocking ripple bellying on the bellows is seted up on the hole surface of little pipe and big pipe, the excircle of little pipe is including setting up one section cylinder excircle, the setting of little pipe front end are in one section circular cone excircle of little pipe rear end, cylinder excircle grafting location is in the hole of second pipe clamp, circular cone excircle chucking is at the hole drill way position of above-mentioned second pipe clamp.

5. A joint structure of a corrugated tube for a Rogowski coil as claimed in claim 4, wherein a step surface is formed at the adjacent butt joint of the small round tube and the large round tube, and an annular groove is formed in the step surface at a position close to the small round tube in the circumferential direction.

6. A joint structure of corrugated tube for rogowski coil according to claim 4, wherein the pair of huff jackets are permanently fixed by glue between the huff butting faces of the pair of huff jackets after sandwiching the corrugated tube.

7. A coupling structure of a corrugated tube for a rogowski coil according to claim 1, wherein an outer hexagonal flange is provided on the outer circle of the first pipe clamp at a position close to the tail end of the external thread of the first pipe clamp.

8. A joint structure of a corrugated tube for a rogowski coil according to claim 1, wherein the inner hole of the first tube clamp is a shaped hole, the cross-sectional profile of the shaped hole is defined by two ends of a segment of an arc-shaped profile and two ends of a segment of a V-shaped profile which are butted, and the tip of the V-shaped profile is provided with a transition arc; wherein one end of the corrugated tube is positioned on the arc-shaped profile of the profiled hole, the cable lead-out space being formed between the section of the V-shaped profile and the corrugated tube.

9. A coupling structure for a corrugated tube of a rogowski coil as set forth in claim 2, wherein an inclined surface is provided at an upper side opening portion of a tail end of said first tube clamp, said inclined surface being inclined in a direction away from said upper arc-shaped pressing plate to prevent a terminal lead-out wire of the rogowski coil from interfering with the upper arc-shaped pressing plate.

Images