Portable capacitive current measuring device

Abstract

The utility model discloses a portable capacitance current measuring device, which belongs to the technical field of portable measuring devices, and comprises a body component, a current measuring component and a current measuring component, the storage assembly comprises a storage cloth belt arranged on the inner bottom wall of the upper box body and at least two limiting sticks installed on the inner bottom wall of the upper box body in a sliding mode, the storage cloth belt penetrates through the limiting sticks, and the storage cloth belt penetrates through the limiting sticks; a containing space is formed between the containing cloth belt between every two adjacent limiting rollers and the inner bottom wall of the upper box body. Electrician tools of various sizes and lengths, such as screwdrivers, pliers, measuring tapes and the like, can be stored in a storage space formed between the storage cloth belt between every two adjacent limiting sticks and the inner bottom wall of the upper box body.

Description

Technical Field

[0001] The utility model relates to the technical field of portable measuring devices, in particular to a portable capacitance current measuring device. Background Art

[0002] A capacitance current measuring device is used to measure capacitance and current in a distribution network. Usually, the capacitance current measuring device is in the shape of a cube and is placed in a portable toolbox for easy carrying and measurement by electricians. During the measurement by electricians, some electrician tools may be used, such as screwdrivers, pliers, etc. And these tools need to be carried by electricians additionally, either carried with them or carried in an extra cloth bag, which is not very convenient and may be lost. Therefore, electrician tools such as screwdrivers and pliers are directly placed in the portable toolbox for easy carrying. However, due to the precision and vulnerability of the capacitance current measuring device, if electrician tools such as screwdrivers and pliers are directly placed in the portable toolbox, the capacitance current testing device may be damaged due to jolting. Content of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the specification of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. Such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above and / or problems existing in the prior art, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present utility model is how to solve the problem of fixing electrician tools.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: a portable capacitance current measuring device, which includes a body assembly including an upper box body; a storage assembly including a storage cloth belt arranged on the inner bottom wall of the upper box body, a limiting rod slidably installed on the inner bottom wall of the upper box body, the storage cloth belt passing through the limiting rod, at least two limiting rods being provided, and a receiving space being formed between the storage cloth belt between two adjacent limiting rods and the inner bottom wall of the upper box body.

[0007] As a preferred solution of the portable capacitance current measuring device of the present utility model, wherein: the body assembly further includes a lower box body, the upper box body is rotatably connected to the lower box body; a capacitance current measuring member is arranged in the lower box body.

[0008] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: the length direction of the storage cloth belt is parallel to the length direction of the inner bottom wall of the upper box body, and at least one storage cloth belt is provided.

[0009] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: mounting rods are provided at both ends of the storage cloth belt, and the mounting rods are fixedly mounted on the inner bottom wall of the upper box body; a gap is left between the storage cloth belt and the inner bottom wall of the upper box body.

[0010] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: a chute is provided on the inner bottom wall of the upper box body, the length direction of the chute is parallel to the length direction of the inner bottom wall of the upper box body, and a magnetic strip is provided on the inner bottom wall of the chute.

[0011] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: a through groove is provided on the limiting rod, the through groove penetrates through the left and right end faces of the limiting rod, and the storage cloth belt passes through the through groove.

[0012] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: a mounting hole is provided on the limiting rod, a mounting shaft is elastically mounted in the mounting hole, a roller is rotatably mounted on the mounting shaft, the roller is located in the through groove, and rolling friction is provided between the roller and the through groove; a magnet is further provided on the mounting shaft, and the magnet is adapted to attract the magnetic strip.

[0013] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: a vertically arranged first limiting groove and a horizontally arranged second limiting groove are formed on the inner peripheral wall of the mounting hole, the shape of the second limiting groove is arc-shaped, and the first limiting groove is communicated with the second limiting groove; a sliding block is provided on the outer peripheral wall of the mounting shaft, and the sliding block is slidably connected with the first limiting groove or the second limiting groove.

[0014] As a preferred embodiment of the portable capacitance current measuring device of the present utility model, wherein: the capacitance current measuring component includes a capacitance current measuring instrument and a 4PT wiring measuring circuit; the 4PT wiring measuring circuit includes an open delta, a PT measuring coil and a secondary winding, four PT measuring coils and four secondary windings are provided, and the open delta is short-circuited; the PT measuring coil includes a three-phase voltage measuring coil and a zero-sequence voltage measuring coil, both ends of the three-phase voltage measuring coil are respectively connected with the high-voltage side and the three-phase power, and the zero-sequence voltage measuring coil is connected to the grounding end of the three-phase voltage measuring coil.

[0015] As a preferred embodiment of the portable capacitive current measuring device of the present utility model, the following is provided: the four secondary windings are connected to the low-voltage side and respectively correspond to the four PT measuring coils. The four secondary windings are connected in parallel with an L terminal, and the zero-sequence voltage secondary winding is grounded to form an N terminal. The L terminal and the N terminal are respectively connected to the output terminals of the capacitive current measuring instrument.

[0016] The beneficial effect of the present utility model is that the accommodating space formed between the storage cloth belt between two adjacent limiting rods and the inner bottom wall of the upper box body can accommodate various sizes and lengths of electrical tools, such as screwdrivers, pliers, tape measures, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0018] Figure 1 It is a structural diagram of the portable capacitive current measuring device of the present utility model.

[0019] Figure 2 It is a structural diagram of the lower box body of the portable capacitive current measuring device of the present utility model.

[0020] Figure 3 It is a structural diagram of the upper box body of the portable capacitive current measuring device of the present utility model.

[0021] Figure 4 It is a partial structural diagram of the storage assembly of the portable capacitive current measuring device of the present utility model.

[0022] Figure 5 It is a partial cross-sectional view of the storage assembly of the portable capacitive current measuring device of the present utility model.

[0023] Figure 6 It is a structural diagram of the installation shaft of the storage assembly of the portable capacitive current measuring device of the present utility model.

[0024] Figure 7 It is a 4PT wiring measurement circuit of the portable capacitive current measuring device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings of the specification.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively exclusive embodiments from other embodiments.

[0028] Embodiment 1

[0029] Referring to Figures 1 to 6 , which is the first embodiment of the present utility model. This embodiment provides a portable capacitive current measurement device. The portable capacitive current measurement device includes a body assembly 100 and a storage assembly 200; the body assembly 100 is used to mount the storage assembly 200, and the storage assembly 200 is used to store tools.

[0030] Specifically, the body assembly 100 includes an upper box body 101; the storage assembly 200 includes a storage cloth belt 201 disposed on the inner bottom wall of the upper box body 101, a limiting rod 202 slidably mounted on the inner bottom wall of the upper box body 101. The storage cloth belt 201 passes through the limiting rod 202. There are at least two limiting rods 202. A receiving space 203 is formed between the storage cloth belt 201 between two adjacent limiting rods 202 and the inner bottom wall of the upper box body 101. In this embodiment, there are four limiting rods 202; the receiving space 203 is used to store electrician tools such as screwdrivers, pliers, tape measures, etc.

[0031] During use, the operator slides the limiting rod 202. When the limiting rod 202 slides, the surface area of the storage cloth belt between two adjacent limiting rods will change accordingly, that is, the receiving space formed between the storage cloth belt 201 between two adjacent limiting rods 202 and the inner bottom wall of the upper box body 101 becomes larger or smaller, so as to accommodate electrician tools of different sizes.

[0032] Embodiment 2

[0033] Referring to Figures 1 to 7 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment.

[0034] Specifically, the body assembly 100 further includes a lower box body 102, and the upper box body 101 is hinged to the lower box body 102; a capacitive current measuring member 103 is disposed in the lower box body 102, and the capacitive current measuring member 103 is used to measure the capacitance of the device to be measured.

[0035] Preferably, the length direction of the storage cloth belt 201 is parallel to the length direction of the inner bottom wall of the upper box body 101, and at least one storage cloth belt 201 is provided; in this embodiment, two storage cloth belts 201 are provided, and the two storage cloth belts 201 are arranged in parallel with each other.

[0036] Preferably, mounting rods 204 are provided at both ends of the storage cloth belt 201, and the mounting rods 204 are fixedly mounted on the inner bottom wall of the upper box body 101. The length direction of the mounting rods 204 is perpendicular to the length direction of the inner bottom wall of the upper box body 101; a gap is left between the storage cloth belt 201 and the inner bottom wall of the upper box body 101.

[0037] Preferably, a sliding groove 101a is provided on the inner bottom wall of the upper box body 101. The length direction of the sliding groove 101a is parallel to the length direction of the inner bottom wall of the upper box body 101. A magnetic strip is provided on the inner bottom wall of the sliding groove 101a. The limiting rod 202 is slidably mounted in the sliding groove 101a, and the limiting rod 202 can slide along the length direction of the sliding groove 101a.

[0038] Preferably, a through groove 202a is provided on the limiting rod 202. The through groove 202a penetrates through the left and right end faces of the limiting rod 202. The storage cloth belt 201 passes through the through groove 202a. When the limiting rod 202 slides along the length direction of the sliding groove 101a, the through groove 202a also slides and rubs against the storage cloth belt 201.

[0039] Preferably, a mounting hole 202b is provided on the limiting rod 202. An installation shaft 202c is elastically mounted in the mounting hole 202b. A roller 202d is rotatably mounted on the installation shaft 202c. The roller 202d is located in the through groove 202a, and the roller 202d rolls and rubs against the through groove 202a. When the limiting rod 202 slides along the length direction of the sliding groove 101a, the roller 202d also rolls along the length direction of the through groove 202a; a magnet 202e is also provided on the installation shaft 202c. When the limiting rod 202 slides along the length direction of the sliding groove 101a, the magnet 202e does not attract the magnetic strip. When the limiting rod 202 is stationary, the magnet 202e can attract the magnetic strip.

[0040] Preferably, a vertically arranged first limiting groove 202b-1 and a horizontally arranged second limiting groove 202b-2 are formed on the inner peripheral wall of the mounting hole 202b. The shape of the second limiting groove 202b-2 is arc-shaped, and the first limiting groove 202b-1 communicates with the second limiting groove 202b-2; a sliding block 202c-1 is provided on the outer peripheral wall of the mounting shaft 202c, and the sliding block 202c-1 is slidably connected to the first limiting groove 202b-1 or the second limiting groove 202b-2; when the limiting rod 202 slides along the length direction of the sliding groove 101a, the sliding block 202c-1 on the mounting shaft 202c is located in the second limiting groove 202b-2. At this time, the magnet 202e does not attract the magnetic strip, and the roller 202d rolls along the length direction of the through groove 202a; when the limiting rod 202 is stationary, the sliding block 202c-1 is located in the first limiting groove 202b-1. At this time, the magnet 202e attracts the magnetic strip to play a fixing role.

[0041] Preferably, the capacitive current measuring component 103 includes a capacitive current measuring instrument 103a and a 4PT wiring measuring circuit 103b; the capacitive current measuring instrument 103a in this embodiment is a prior art and will not be elaborated here. For example, the model of the capacitive current measuring instrument 103a in this embodiment is the JY three-phase capacitance and inductance measuring instrument; the 4PT wiring measuring circuit 103b includes an open delta 103c, a PT measuring coil 103d, and a secondary winding 103e. There are four PT measuring coils 103d and four secondary windings 103e, and the open delta 103c is short-circuited; the PT measuring coil 103d includes a three-phase voltage measuring coil 103d-1 and a zero-sequence voltage measuring coil 103d-2. The two ends of the three-phase voltage measuring coil 103d-1 are respectively connected to the high-voltage side and the three-phase power supply, and the zero-sequence voltage measuring coil 103d-2 is connected to the grounding end of the three-phase voltage measuring coil 103d-1.

[0042] Preferably, the four secondary windings 103e are connected to the low-voltage side and respectively correspond to the four PT measuring coils 103d. The four secondary windings 103e are connected in parallel with an L terminal. The secondary winding 103e includes a zero-sequence voltage secondary winding 103f. The zero-sequence voltage secondary winding 103f is grounded to form an N terminal. The L terminal and the N terminal are respectively connected to the output terminal of the capacitive current measuring instrument 103a.

[0043] The open delta 103c is a triangle formed by 1ao-1xo, 2ao-2xo, and 3ao-3xo. The three-phase voltage measuring coils 103d-1 are respectively PT1, PT2, and PT3, the zero-sequence voltage measuring coil 103d-2 is PT4, and the three secondary windings 103e are a1-x1, a2-x2, and a3-x3. The zero-sequence voltage secondary winding 103f is ox-oa, and the phase voltages are respectively measured from the A-N, B-N, and C-N terminals. In this wiring method, the voltage at the N-L terminal is 57.7V when a single-phase ground fault occurs in the system.

[0044] To facilitate the understanding of the technical solution of the present utility model, a brief description of its working process is given below:

[0045] During adjustment: When the limiting rod 202 slides along the length direction of the sliding groove 101a, the slider 202c-1 on the mounting shaft 202c is located in the second limiting groove 202b-2. At this time, the magnet 202e is not attracted to the magnetic strip, and the roller 202d rolls along the length direction of the through groove 202a, so as to adjust the distance between two adjacent limiting rods 202, and then adjust the size of the accommodating space 203 between the storage cloth belt 201 and the inner bottom wall of the upper box body 101 between two adjacent limiting rods 202, so as to adapt to different electrical tools;

[0046] When not in use: The limiting rod 202 is stationary, and the slider 202c-1 is located in the first limiting groove 202b-1. At this time, the magnet 202e is attracted to the magnetic strip, playing a fixing role.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model and not to limit it. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present utility model, and all of them should be covered by the scope of the claims of the present utility model.

Claims

1. A portable capacitive current measurement device, characterized in that: including, a body component (100) including an upper box body (101); a storage component (200) including a storage cloth belt (201) arranged on the inner bottom wall of the upper box body (101), a limiting rod (202) slidably mounted on the inner bottom wall of the upper box body (101), the storage cloth belt (201) passing through the limiting rod (202), at least two limiting rods (202) being provided, and a receiving space (203) being formed between the storage cloth belt (201) between two adjacent limiting rods (202) and the inner bottom wall of the upper box body (101); the body component (100) further includes a lower box body (102), the upper box body (101) being rotatably connected to the lower box body (102); a capacitive current measuring member (103) is provided in the lower box body (102); the capacitive current measuring member (103) includes a capacitive current measuring instrument (103a) and a 4PT wiring measuring circuit (103b); the 4PT wiring measuring circuit (103b) includes an open delta (103c), a PT measuring coil (103d), and a secondary winding (103e), four PT measuring coils (103d) and four secondary windings (103e) being provided, the open delta (103c) being short-circuited; the PT measuring coil (103d) includes a three-phase voltage measuring coil (103d-1) and a zero-sequence voltage measuring coil (103d-2), two ends of the three-phase voltage measuring coil (103d-1) being respectively connected to the high voltage side and three-phase power, and the zero-sequence voltage measuring coil (103d-2) being connected to the grounding end of the three-phase voltage measuring coil (103d-1); the four secondary windings (103e) are connected to the low voltage side and respectively correspond to the four PT measuring coils (103d), an L end being connected in parallel to the four secondary windings (103e), the secondary winding (103e) including a zero-sequence voltage secondary winding (103f) which is grounded to form an N end, and the L end and the N end being respectively connected to the output end of the capacitive current measuring instrument (103a).

2. The portable capacitive current measurement device according to claim 1, wherein: the length direction of the storage cloth belt (201) is parallel to the length direction of the inner bottom wall of the upper box body (101), and at least one storage cloth belt (201) is provided.

3. The portable capacitive current measuring device according to claim 2, wherein: both ends of the storage cloth belt (201) are provided with mounting rods (204), the mounting rods (204) being fixedly mounted on the inner bottom wall of the upper box body (101); a gap is left between the storage cloth belt (201) and the inner bottom wall of the upper box body (101).

4. The portable capacitive current measurement device according to claim 3, wherein: a chute (101a) is provided on the inner bottom wall of the upper box body (101), the length direction of the chute (101a) being parallel to the length direction of the inner bottom wall of the upper box body (101), and a magnetic strip being provided on the inner bottom wall of the chute (101a).

5. The portable capacitive current measurement device according to claim 4, wherein: The limiting rod (202) is provided with a through groove (202a), the through groove (202a) penetrates through the left and right end faces of the limiting rod (202), and the storage cloth belt (201) passes through the through groove (202a).

6. The portable capacitive current measurement device as described in claim 5, characterized in that: The limiting rod (202) is provided with a mounting hole (202b), an installation shaft (202c) is elastically installed in the mounting hole (202b), a roller (202d) is rotatably installed on the installation shaft (202c), the roller (202d) is located in the through groove (202a), and a rolling friction is formed between the roller (202d) and the through groove (202a); a magnet (202e) is further arranged on the installation shaft (202c), and the magnet (202e) is adapted to attract a magnetic strip.

7. The portable capacitive current measuring device according to claim 6, characterized in that: A vertically arranged first limiting groove (202b-1) and a horizontally arranged second limiting groove (202b-2) are formed on the inner peripheral wall of the mounting hole (202b), the shape of the second limiting groove (202b-2) is arc-shaped, and the first limiting groove (202b-1) is communicated with the second limiting groove (202b-2); a sliding block (202c-1) is arranged on the outer peripheral wall of the installation shaft (202c), and the sliding block (202c-1) is slidably connected with the first limiting groove (202b-1) or the second limiting groove (202b-2).

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