CN113433372B

CN113433372B - Non-contact current detection device of building fire-fighting equipment

Info

Publication number: CN113433372B
Application number: CN202110706210.2A
Authority: CN
Inventors: 邹婕; 王强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-06-10
Anticipated expiration: 2041-06-24
Also published as: CN113433372A

Abstract

The invention discloses a non-contact current detection device of building fire-fighting equipment, and relates to the technical field of fire-fighting detection. According to the invention, the supporting plates are arranged at the two ends of the lower shell, the clamping device is arranged at the top of the supporting plates, and the cable is clamped by the two sides of the lower shell, so that the cable passing through the Rogowski coil can be ensured to be always positioned at the axis of the Rogowski coil, the accuracy of a measurement result is improved, and the problem that the measurement result is unstable because the cable cannot be ensured to be positioned at the axis of the Rogowski coil because the cable passes through the clamping device and then passes through the Rogowski coil due to the fact that the cable is positioned at one side of the Rogowski coil in the prior art and has a certain distance with the Rogowski coil is solved.

Description

Non-contact current detection device of building fire-fighting equipment

Technical Field

The invention relates to the technical field of fire fighting detection, in particular to a non-contact current detection device of building fire fighting equipment.

Background

With the continuous development of the power industry, not only cities are not full of a large number of cables and wires, but also various complex cables and wires are distributed in large-scale factories, the number of fire fighting equipment in the large-scale factories is large, and whether the line of the fire fighting equipment can normally run is also very critical, so that the current detection needs to be carried out on the line of the fire fighting equipment regularly, the traditional current detection prevention needs to detect one end of a cable connected with detection equipment, the normal use of a power supply is influenced, and a great potential safety hazard exists.

In prior art, traditional rogowski coil is mostly closed structure, need detect the electric current of circuit or cable, need cup joint from the one end of cable, just can realize the detection to the cable current, use that can be normal when using on the cable short, if cable length is very long or one end is connected with other equipment that need continuously move then unable normal the measuring, and when measuring, the cable passes behind the coil, its position inside the coil can't be fixed, the electric current direction of cable is not in the axle center department of coil, thereby influence measuring accuracy.

Through search, chinese patent granted publication No. CN109444511B discloses a non-contact circuit detection device, which comprises: a base; the bottom of the supporting frame is fixed at the center of the top of the base; the bottom of the lower shell is fixed to the top of the supporting frame. This non-contact circuit detection device has the influence of cable to north side cable around can effectual reduction, the current measurement's of guarantee cable precision, open-close type detection coil can not receive the connection status of cable and the influence of the length of cable, carry out the electric current of quick accurate measurement quilt survey cable, convenience more and practicality, make the axis of cable just be in the axle center department of the Rogowski coil under the closure state, guarantee the accuracy of the degree of accuracy of measurement and the accuracy of the size of electric current in the circuit, the stability of casing about the guarantee during measurement, convenient regulation and use simultaneously, user's the convenience that provides is measured.

However, the non-contact circuit detecting device has the following disadvantages:

(1) when the cable passes through the clamping device and then passes through the Rogowski coil, the cable is possibly bent, and the cable cannot be ensured to be positioned at the axis of the Rogowski coil, so that the measurement result is unstable.

(2) Go up one side of casing and pass through rotating device and lower body coupling, the opposite side of going up the casing passes through the joint piece, lower fixed block, adjust the chamber, the joint chamber, the bracing piece, the dwang, the pulling pole, the pulling groove, the sliding tray, the auxiliary rod, the stopper, joint blade and reset spring cooperation are connected with the opposite side of casing down, it is relatively poor to realize simple function practicality through complicated structure, in addition, adopt this kind of mode to be connected last casing and casing down, the hidden danger that the Rogowski coil on the casing and the Rogowski coil on the casing down can not the stable contact exists, influence measuring result.

Disclosure of Invention

The invention provides a non-contact current detection device of building fire-fighting equipment, which solves the technical problems in the background technology.

In order to solve the technical problem, the non-contact current detection device for the building fire fighting equipment comprises a semi-annular lower shell and an upper shell matched with the lower shell, wherein the side walls of two ends of the lower shell are connected with the side walls of two ends of the upper shell through connecting devices, and the non-contact current detection device comprises a first current detection device, a second current detection device and a third current detection device, wherein the first current detection device comprises a first half-annular lower shell and a second half-annular upper shell, the second half-annular lower shell is matched with the first half-annular lower shell, the first half-annular lower shell is matched with the second half-annular lower shell, the second half-annular lower shell is matched with the second half-annular lower shell, the first half-annular lower shell is connected with the second half-annular upper shell through connecting devices, and the third current detection device comprises:

the connecting device comprises fixed blocks a integrally arranged on the side walls at two ends of the upper shell, the side walls at two ends of the lower shell are integrally provided with fixed blocks b, notches are formed in the fixed blocks a, rotating shafts are connected in the notches in a rotating mode, bolts are fixedly sleeved on the outer side walls of the rotating shafts, notches corresponding to the bolts are formed in the fixed blocks b, handle nuts are sleeved on the outer side walls of the bottoms of the bolts in a threaded mode, and the tops of the handle nuts are connected with the bottoms of the fixed blocks b;

the clamping device comprises an upper shell, a lower shell, a support block, two slide blocks, a clamping piece, two arc-shaped grooves and two clamping pieces, wherein the upper shell and the lower shell are both provided with semi-annular Rogowski coils, the inner side wall of the upper shell and the inner side wall of the lower shell are both provided with semi-annular mounting grooves corresponding to the semi-annular Rogowski coils, the two sides of the lower shell are both fixedly connected with support plates, the top of each support plate is fixedly connected with the support block, the support blocks are slidably connected with the two slide blocks, one side of each support block is provided with a sliding opening corresponding to the slide block, the support blocks are rotatably connected with two-way threaded rods, one ends of the two-way threaded rods penetrate through the support blocks and extend towards the tops of the support blocks, the slide blocks are sleeved on the outer side walls of the two-way threaded rods, the clamping pieces are fixedly connected with the slide blocks, the opposite sides of the two clamping pieces are both provided with the arc-shaped grooves, and the two clamping pieces are arranged in parallel with the support plates;

one of the semi-annular Rogowski coils is connected with a digital transmitter through a connecting wire.

Preferably, the lateral wall of bolt slides and has cup jointed two gaskets, two the gasket all slides and cup joints on the lateral wall of bolt, the cover is equipped with the spring on the lateral wall of bolt, the both ends of spring all with gasket fixed connection, the top of handle nut contacts with the bottom of one of them gasket.

Preferably, one side fixedly connected with sleeve that the spring was kept away from to one of them gasket, the sleeve sets up with the gasket is integrative, the sleeve cover is established on the lateral wall of bolt, the bottom of fixed block b is provided with the spacing recess that corresponds with the sleeve.

Preferably, the lower shell and the upper shell are both made of polyethylene, and the weight of the lower shell is greater than that of the upper shell.

Preferably, the inner side wall of the semi-annular mounting groove is provided with a shielding layer.

Preferably, two sides of the lower shell are connected with the supporting plate through telescopic rods.

Preferably, one end of the bidirectional threaded rod is fixedly connected with a rotating disc.

Preferably, the two support blocks are arranged with central symmetry below the lower shell.

Preferably, a balancing weight is fixedly arranged at the top of one end, far away from the supporting block, of the supporting plate, and the weight of the balancing weight is equal to the sum of the supporting block, the sliding block, the bidirectional threaded rod and the rotating disc.

Compared with the related art, the non-contact current detection device of the building fire fighting equipment provided by the invention has the following beneficial effects:

1. the invention provides a non-contact current detection device of building fire-fighting equipment, which is characterized in that supporting plates are arranged at two ends of a lower shell, a clamping device is arranged at the top of each supporting plate, and a cable is clamped at two sides of the lower shell, so that the cable passing through a Rogowski coil can be ensured to be always positioned at the axis of the Rogowski coil, the accuracy of a measurement result is improved, and the problem that the existing clamping device is positioned at one side of the Rogowski coil, a certain distance is reserved between the clamping device and the Rogowski coil, when the cable passes through the clamping device and then passes through the Rogowski coil, the cable is possibly bent, and the cable cannot be ensured to be positioned at the axis of the Rogowski coil, so that the measurement result is unstable is solved.

2. The invention provides a non-contact current detection device of building fire fighting equipment, wherein a lower shell is connected with an upper shell through a connecting device, a spring is compressed through rotating a handle nut, two gaskets are extruded when the spring is compressed, so that the upper shell and the lower shell are stably connected together, a completed Rogowski coil is formed by two semi-annular Rogowski coils, the current detection coil can not be influenced by the connection state of the cable and the length of the cable, the current of a tested cable can be quickly and accurately measured, the device is more convenient and practical, the problems that the Rogowski coil on the upper shell and the Rogowski coil on the lower shell of the existing open-close type current detection device cannot be stably contacted and the measurement result is influenced are solved, in addition, the non-contact current detection device is more convenient to measure, the connection stability of the semi-annular Rogowski coils is good, the measuring result is more accurate.

3. The invention provides a non-contact current detection device of building fire-fighting equipment, which is characterized in that a sleeve is arranged at the top of a gasket contacted with a fixed block b, and the sleeve is inserted into a corresponding limiting groove, so that a connecting device and a lower shell can be stably connected together, and the situation that the lower shell is disconnected with an upper shell due to cable shaking is avoided.

Drawings

FIG. 1 is a schematic structural diagram of a non-contact current detection device of a fire fighting equipment of a building;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

FIG. 3 is a front view of a non-contact current detecting device of a fire fighting equipment for a building;

FIG. 4 is a top view of a non-contact current detecting device of a fire fighting equipment for a building;

FIG. 5 is a left side view of a non-contact current detecting device of a fire fighting equipment for a building;

FIG. 6 is a right side view of a non-contact current detecting device of a fire fighting equipment of a building;

FIG. 7 is a schematic view of the structure at B in FIG. 6;

fig. 8 is a schematic view of a connection structure of a spacer and a sleeve in a non-contact current detection device of a fire fighting equipment for a building.

Reference numbers in the figures: 1. a lower housing; 2. an upper housing; 3. a half-toroidal rogowski coil; 4. a connecting device; 401. a recess; 402. a rotating shaft; 403. a bolt; 404. a gasket; 405. a spring; 406. a handle nut; 407. a notch; 408. a fixed block a; 409. a fixed block b; 410. a sleeve; 5. a telescopic rod; 6. a support plate; 7. connecting a lead; 8. a digital transmitter; 9. a support block; 10. a bidirectional threaded rod; 11. rotating the disc; 12. a slider; 13. a clamping member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Given by fig. 1-8, a non-contact current detection device of building fire equipment, including semi-annular lower casing 1 and the last casing 2 that sets up with lower casing 1 matching, the both ends lateral wall of lower casing 1 all is connected with the both ends lateral wall of last casing 2 through connecting device 4, wherein:

the connecting device 4 comprises fixing blocks a408 integrally arranged on the side walls of the two ends of the upper shell 2, the side walls of the two ends of the lower shell 1 are integrally provided with fixing blocks b409, a notch 401 is arranged on the fixing block a408, a rotating shaft 402 is rotatably connected in the notch 401, a bolt 403 is fixedly sleeved on the outer side wall of the rotating shaft 402, a notch 407 corresponding to the bolt 403 is arranged on the fixing block b409, a handle nut 406 is sleeved on the outer side wall of the bottom of the bolt 403 in a threaded manner, and the top of the handle nut 406 is connected with the bottom of the fixing block b 409;

one of the half-toroidal rogowski coils 3 is connected with a digital transmitter 8 through a connecting wire 7.

The casing of non-contact current detection device comprises lower casing 1 and upper casing 2, adopts this open-close type casing, can not receive the connection status of cable and the influence of the length of cable, carries out the electric current of quick accurate measurement quilt survey cable, convenience more and practicality.

The Rogowski coil for detecting the current of the cable also adopts two semi-annular Rogowski coils 3, and the purpose is to match an open-close type shell, so that the non-contact current detection device is not influenced by the connection state of the cable and the length of the cable, the current of the detected cable is rapidly and accurately measured, and the device is more convenient and practical.

The connecting device 4 is used for stably connecting the lower shell 1 and the upper shell 2 together, and simultaneously combining the two semi-annular rogowski coils 3 into a complete rogowski coil so as to detect the current of the cable.

When the lower shell 1 and the upper shell 2 need to be connected together by using the connecting device 4, the upper shell 2 is firstly placed on the top of the lower shell 1, the bolt 403 enters the notch 407 on the fixing block b409, and then the handle nut 406 is rotated to stably connect the lower shell 1 and the upper shell 2 together, so that the two half-ring-shaped rogowski coils 3 are combined into a complete rogowski coil.

Two gaskets 404 are sleeved on the outer side wall of the bolt 403 in a sliding mode, the two gaskets 404 are sleeved on the outer side wall of the bolt 403 in a sliding mode, a spring 405 is sleeved on the outer side wall of the bolt 403, two ends of the spring 405 are fixedly connected with the gaskets 404, and the top of the handle nut 406 is in contact with the bottom of one of the gaskets 404.

The spring 405 and the spacer 404 are used for ensuring that the two half-ring-shaped rogowski coils 3 are always in contact to form a complete rogowski coil in the process of connecting the lower shell 1 and the upper shell 2.

One side of one of the spacers 404, which is far away from the spring 405, is fixedly connected with a sleeve 410, the sleeve 410 and the spacer 404 are integrally arranged, the sleeve 410 is sleeved on the outer side wall of the bolt 403, and the bottom of the fixing block b409 is provided with a limiting groove corresponding to the sleeve 410.

The sleeve 410 is used for limiting the position of the gasket 404 and the position of the bolt 403, so that the upper shell 2 and the lower shell 1 are prevented from being separated from contact in the process of shaking the cable.

Example two

On the basis of embodiment one, the equal fixedly connected with backup pad 6 in both sides of lower casing 1, the top fixedly connected with supporting shoe 9 of backup pad 6, sliding connection has two sliders 12 on the supporting shoe 9, one side of supporting shoe 9 is provided with the slip mouth that corresponds with slider 12, rotating connection has two-way threaded rod 10 on the supporting shoe 9, the one end of two-way threaded rod 10 runs through supporting shoe 9 and extends to the top of supporting shoe 9, slider 12 screw thread cup joints on the lateral wall of two-way threaded rod 10, fixedly connected with holder 13 on the slider 12, one side that two holders 13 are relative all is provided with the arc recess, two holders 13 and backup pad 6 parallel arrangement.

The cable is clamped and fixed on two sides of the shell, so that the cable penetrating through the Rogowski coil can be always kept at the axis of the Rogowski coil, and the cable can be ensured to be always positioned at the axis of the Rogowski coil when the cable is in a shaking state.

The material of lower casing 1 and the material of upper casing 2 are polyethylene, and the weight of lower casing 1 is greater than the weight of upper casing 2.

The lower shell 1 is heavy, and the lower shell 1 can be guaranteed to be used below.

And the inner side wall of the semi-annular mounting groove is provided with a shielding layer.

The effect of shielding layer is to avoid other cables to cause the influence to the cable of test, avoids influencing the measuring result.

Two sides of the lower shell 1 are connected with a supporting plate 6 through telescopic rods 5.

The telescopic rod 5 is used for conveniently adjusting the distance between the supporting plate 6 and the lower shell 1 so as to adjust the clamping position of the clamping piece 13 on the cable as required.

The two supporting blocks 9 are arranged symmetrically with the lower shell 1 as the center.

One end of the bidirectional threaded rod 10 is fixedly connected with a rotating disc 11.

The function of the rotating disk 11 is to facilitate the rotation of the bidirectional threaded rod 10.

The function of the rotating disc 11 is to facilitate the rotation of the bidirectional threaded rod 10, so as to adjust the simultaneous movement of the two clamping members 13 and to clamp and fix the cable.

The working principle is as follows:

when needing to use this non-contact current detection device to carry out current detection to the cable run of building fire equipment, at first place casing 1 in the below of cable down, go up casing 2 and place in the top of cable, and make and go up casing 2 and be located the top of casing 1 down, make bolt 403 enter into the breach 407 on fixed block b409, and make sleeve 410 be located the spacing recess of fixed block b409 bottom, then rotate handle nut 406, handle nut 406 pivoted in-process drives one of them gasket 404 toward the direction motion of fixed block b409, extrude spring 405, thereby make casing 1 and last casing 2 stable be connected to together down. Then adjusting the length of the telescopic rod 5, finally rotating the rotating disc 11 to drive the bidirectional threaded rod 10 to rotate, and clamping and fixing the cable by using the two clamping pieces 13 to detect the current of the cable.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a non-contact current detection device of building fire equipment, includes lower casing (1) of semicircle form and last casing (2) that set up with lower casing (1) matching, its characterized in that: the both ends lateral wall of casing (1) all is connected with the both ends lateral wall of last casing (2) through connecting device (4) down, wherein:

the connecting device (4) comprises fixing blocks a (408) integrally arranged on the side walls of two ends of the upper shell (2), the side walls of two ends of the lower shell (1) are integrally provided with fixing blocks b (409), a notch (401) is arranged on the fixing blocks a (408), a rotating shaft (402) is rotatably connected in the notch (401), the outer side wall of the rotating shaft (402) is fixedly sleeved with a bolt (403), a notch (407) corresponding to the bolt (403) is arranged on the fixing blocks b (409), the outer side wall of the bottom of the bolt (403) is sleeved with a handle nut (406) in a threaded manner, and the top of the handle nut (406) is connected with the bottom of the fixing blocks b (409); the outer side wall of the bolt (403) is sleeved with two gaskets (404) in a sliding mode, the two gaskets (404) are sleeved on the outer side wall of the bolt (403) in a sliding mode, the outer side wall of the bolt (403) is sleeved with a spring (405), two ends of the spring (405) are fixedly connected with the gaskets (404), and the top of the handle nut (406) is in contact with the bottom of one of the gaskets (404); one side, far away from the spring (405), of one of the gaskets (404) is fixedly connected with a sleeve (410), the sleeve (410) and the gasket (404) are integrally arranged, the sleeve (410) is sleeved on the outer side wall of the bolt (403), and the bottom of the fixed block b (409) is provided with a limiting groove corresponding to the sleeve (410);

the upper casing (2) and the lower casing (1) are both provided with semi-annular Rogowski coils (3), the inner side wall of the upper casing (2) and the inner side wall of the lower casing (1) are both provided with semi-annular mounting grooves corresponding to the semi-annular Rogowski coils (3), two sides of the lower casing (1) are both fixedly connected with supporting plates (6), the top of each supporting plate (6) is fixedly connected with a supporting block (9), two sliders (12) are slidably connected onto the supporting blocks (9), one side of each supporting block (9) is provided with a sliding port corresponding to each slider (12), each supporting block (9) is rotatably connected with a bidirectional threaded rod (10), one end of each bidirectional threaded rod (10) penetrates through each supporting block (9) and extends to the top of each supporting block (9), and each slider threaded rod (12) is in threaded sleeve connection with the outer side wall of each bidirectional threaded rod (10), clamping pieces (13) are fixedly connected to the sliding block (12), arc-shaped grooves are formed in one sides, opposite to the two clamping pieces (13), of the two clamping pieces (13), and the two clamping pieces (13) are arranged in parallel with the supporting plate (6);

one of the semi-annular Rogowski coils (3) is connected with a digital transmitter (8) through a connecting wire (7).

2. The non-contact current detection device for the fire fighting equipment of the building according to claim 1, characterized in that the lower casing (1) and the upper casing (2) are both made of polyethylene, and the weight of the lower casing (1) is greater than that of the upper casing (2).

3. The non-contact current detection device for the fire fighting equipment of the building as defined in claim 1, wherein the inner side wall of the semi-annular installation groove is provided with a shielding layer.

4. The non-contact current detection device of the building fire fighting equipment according to claim 1, characterized in that two sides of the lower shell (1) are connected with the support plate (6) through telescopic rods (5).

5. The non-contact current detection device of the building fire fighting equipment according to claim 1, characterized in that a rotating disk (11) is fixedly connected to one end of the bidirectional threaded rod (10).

6. The non-contact current detecting device for the fire fighting equipment of building according to claim 1, wherein the two supporting blocks (9) are arranged with the lower housing (1) as the center.