Phase sequence verification device for three-phase refrigeration socket

Abstract

An embodiment of the utility model provides a three-phase refrigeration socket phase sequence verification device, which comprises a measurement box, a phase sequence meter, wiring terminals, a connecting lead and a three-phase refrigeration plug, the three wiring terminals L1, L2 and L3 are fixedly installed in the measurement box, the phase sequence meter is fixedly installed on a panel of the measurement box, a measurement result observation surface of the phase sequence meter is arranged outwards, and the three wiring terminals L1, L2 and L3 are fixedly installed on the panel of the measurement box. Three measuring leads L1, L2 and L3 of the phase sequence meter are correspondingly connected and fixed on three wiring terminals L1, L2 and L3, the three-phase refrigeration plug is matched with a refrigeration socket to be tested, and three pins L1, L2 and L3 of the three-phase refrigeration plug are correspondingly connected and fixed on the three wiring terminals L1, L2 and L3 through connecting wires respectively. According to the embodiment of the utility model, the phase sequence verification process is simplified from the original seven processes to three processes, so that the verification efficiency is effectively improved, the electric shock condition is avoided, and the safety of verification personnel is ensured on the premise of ensuring the verification precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to ship equipment function detection technical field, especially a three -phase refrigeration socket phase sequence verification device. BACKGROUND

[0002] The ship container ship (abbreviation container ship) shipborne refrigeration socket is the power supply equipment of the refrigeration container, and the phase sequence of the three-phase power supply of the socket must be consistent with the power supply phase sequence of the distribution board on the ship. For the verification work of the phase sequence of the container refrigeration socket of the container ship, the existing technology is usually completed through a series of processes such as disassembling the cover, connecting the wires, reassembling the cover, disassembling the socket protective cover, electrifying, measuring the phase sequence by the phase sequence meter, and reassembling the protective cover. The existing verification method is relatively extensive, the verification process is relatively cumbersome, the verification efficiency is relatively low, the safety is not high, there is a risk of electric shock in the disassembling and measuring process, and the phase sequence verification error is easily caused by problems such as reassembling error and measurement pen connection error. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems existing in the prior art, the utility model embodiment provides a three-phase refrigeration socket phase sequence verification device to solve the technical problems of cumbersome process, low efficiency, accuracy and safety existing in the prior art.

[0004] The utility model embodiment provides a three-phase refrigeration socket phase sequence verification device, which comprises a measuring box, a phase sequence meter, a wiring terminal, a connecting wire and a three-phase refrigeration plug, three wiring terminals L1, L2 and L3 are fixedly installed in the measuring box, the phase sequence meter is fixedly installed on the panel of the measuring box, and the measurement result observation surface thereof is outwardly arranged, three measurement leads L1, L2 and L3 of the phase sequence meter are correspondingly connected and fixed on the three wiring terminals L1, L2 and L3, the three-phase refrigeration plug is matched with the refrigeration socket to be measured, and the three pins L1, L2 and L3 of the three-phase refrigeration plug are correspondingly connected and fixed on the three wiring terminals L1, L2 and L3 through the connecting wire.

[0005] In an embodiment, a PE wiring terminal and a grounding bolt are also fixedly installed in the measuring box, the grounding bolt is connected with the PE wiring terminal through a grounding wire, and the PE pin of the three-phase refrigeration plug is also connected and fixed on the PE wiring terminal through the connecting wire.

[0006] In an embodiment, the measuring box is an iron watertight box.

[0007] In an embodiment, the connecting wire adopts a copper soft cable wire with a specification of RVV 3x1.5+E.

[0008] In an embodiment, the connecting wire adopts a copper soft cable wire with a specification of RVVP 3x1.5+E.

[0009] In an embodiment, a handle is fixedly installed on the measuring box.

[0010] In an embodiment, the length of the connecting wire is not less than 1.5 m.

[0011] Compared with the prior art, the three-phase refrigeration socket phase sequence verification device provided in the embodiment of the utility model has the beneficial effects that: the phase sequence verification process is simplified from the original 7 processes to 3 processes, the processes of disassembling the socket box cover, reassembling the socket box cover, disassembling the socket protection cover, reassembling the protection cover and the like are eliminated, the verification efficiency is effectively improved under the premise of ensuring the verification accuracy, the occurrence of electric shock is avoided, and the safety of the verification personnel is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 A structure schematic view of the three-phase refrigeration socket phase sequence verification device provided in the embodiment of the utility model is shown in the figure;

[0013] Fig. 2 A wiring schematic view of the three-phase refrigeration socket phase sequence verification device provided in the embodiment of the utility model is shown in the figure.

[0014] REFERENCE NUMERALS:

[0015] 1, measuring box; 2, phase sequence meter; 3, wiring terminal; 4, grounding wire; 5, grounding bolt; 6, connecting wire; 7, refrigeration socket box; 8, refrigeration socket; 9, three-phase refrigeration plug. DETAILED DESCRIPTION

[0016] In order to enable the technical personnel in the art to better understand the technical scheme of the utility model, the utility model will be described in detail below in conjunction with the drawings and specific embodiments.

[0017] The various aspects and features of the application are described herein with reference to the accompanying drawings.

[0018] These and other characteristics of the present application will become apparent with the description of some preferred forms thereof given, by way of non-limiting example, with reference to the attached drawings.

[0019] It should also be understood that, although the application has been described with reference to some specific examples, the skilled person can determine many other equivalent forms of the application, which have the features as claimed and thus all fall within the protection scope defined thereby.

[0020] The above and other aspects, features and advantages of the present application will become more apparent with the following detailed description in conjunction with the accompanying drawings.

[0021] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0022] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only for explaining this utility model and are not intended to limit the scope of this utility model. The following description, in conjunction with... Figs. 1-2 The preferred embodiments of this utility model will be described in further detail below:

[0024] like Figs. 1-2 As shown, this utility model embodiment provides a three-phase refrigeration socket phase sequence verification device, including:

[0025] The measuring box 1, phase sequence meter 2, terminal blocks 3, connecting wires 6, and three-phase refrigeration plug 9 are included. The measuring box 1 is fixedly installed with three terminal blocks 3, L1, L2, and L3. The phase sequence meter 2 is fixedly installed on the panel of the measuring box 1 with its measurement result observation side facing outward. The three measuring leads L1, L2, and L3 of the phase sequence meter 2 are correspondingly connected to and fixed on the three terminal blocks 3, L1, L2, and L3. The three-phase refrigeration plug 9 is compatible with the refrigeration socket 8 to be tested, and the three pins L1, L2, and L3 of the three-phase refrigeration plug 9 are respectively connected to and fixed on the three terminal blocks 3, L1, L2, and L3, through the connecting wires 6.

[0026] To protect calibration personnel from electric shock and to prevent electrical equipment from being damaged by overvoltage or other reasons, a PE terminal block 3 and a grounding bolt 5 are also fixedly installed inside the measuring box 1. The grounding bolt 5 is connected to the PE terminal block 3 through a grounding wire 4, and the PE pin of the three-phase refrigeration plug 9 is also connected and fixed to the PE terminal block 3 through a connecting wire 6.

[0027] In an embodiment, the measuring box 1 is a ferrous watertight box with the following size: length* width* height: 200mm*200mm*120mm, and a handle is fixedly installed on the measuring box 1 to facilitate the carrying of the verifier, and a grounding bolt 5 and four wiring terminals 3 (L1, L2, L3 and PE) are installed in the box, and a 1.5 square millimeter grounding wire 4 is used to connect the grounding bolt 5 and the PE wiring terminal 3;

[0028] In an embodiment, the three-phase refrigeration plug 9 adopts a three-phase four-wire refrigeration plastic plug commonly used in ships, and the model is determined according to the model of the three-phase refrigeration socket 8 to be measured, and the plug and the socket are matched;

[0029] In an embodiment, the phase sequence table 2 voltage grade specification is AC690V, which can satisfy the phase sequence measurement of three-phase AC690V and below three-phase power supply, and the phase sequence table 2 displays clockwise as positive sequence and counterclockwise as reverse sequence.

[0030] In an embodiment, the connecting wire 6 adopts a copper soft cable wire with the specification of RVV 3x1.5+E, and the length is not less than 1.5m, wherein RVV represents a copper core polyvinyl chloride insulation polyvinyl chloride sheath soft cable, 3x1.5 represents that there are 3 wire cores in the cable, and the cross-sectional area of each wire core is 1.5 square millimeters, and E represents the ground wire (Earth i ng), which is usually a wire core with a special mark, used to connect the metal shell of electrical equipment and the like to ensure safety. Considering that some ships have higher requirements for verification accuracy, of course, in some application scenarios, in order to avoid the adverse effects of the electromagnetic field in the environment on the verification result, the connecting wire 6 adopts a copper soft cable wire with the specification of RVVP 3x1.5+E, wherein RVVP is a copper core polyvinyl chloride insulation shielding polyvinyl chloride sheath soft cable, also known as an electrical connection anti-interference soft cable, wherein R is the first letter of the Chinese "soft" word, representing a soft copper conductor, indicating that the cable uses a soft copper wire core twisted by multiple thin copper wires, making the cable have good flexibility and can be flexibly laid in various complex environments. The first V is the abbreviation of PVC, representing polyvinyl chloride insulation. Polyvinyl chloride has good electrical insulation performance, mechanical properties and chemical stability, which can effectively isolate the wire core from the outside world, prevent current leakage and short circuit, and ensure the safe operation of the cable. The second V also represents polyvinyl chloride, which refers to the polyvinyl chloride sheath wrapped on the outermost layer of the cable, mainly plays a role in protecting the internal structure of the cable, has the characteristics of wear resistance, corrosion resistance, waterproofness and moisture resistance, and can prolong the service life of the cable. P represents shielding, indicating that the cable has a shielding layer, which is generally composed of aluminum foil, copper wire braid or tinned copper wire braid, and mainly plays a role in resisting external electromagnetic interference, preventing external electromagnetic field from affecting the internal transmission signal of the cable, and also avoiding the internal signal of the cable from radiating outward, ensuring the stability and accuracy of signal transmission.

[0031] The phase sequence table 2 is fixed on the panel of the measuring box 1, the surface of the phase sequence table 2 faces upwards, the measurement of the phase sequence table 2 is convenient to watch, the measurement lead of the phase sequence table 2 is connected to the terminal 3 of the measuring box 1, the connection is one-to-one, the measurement lead L1 of the phase sequence table 2 is connected to the L1 of the terminal 3 of the measuring box 1, the measurement lead L2 is connected to the L2 of the terminal 3 of the measuring box 1, the measurement lead L3 is connected to the L3 of the terminal 3 of the measuring box 1, one end of the connecting wire 6 is connected to the three-phase refrigeration plug 9, and the other end is connected to the phase sequence table 2 of the measuring box 1; the L1, L2, L3 and PE of the plug are connected to the L1, L2, L3 and PE of the terminal of the measuring box 1 through the connecting wire 6 one by one, that is, after being connected through the terminal 3, the L1 of the three-phase refrigeration plug 9 is connected to the L1 of the phase sequence table 2, the L2 of the plug is connected to the L2 of the phase sequence table 2, the L3 of the plug is connected to the L3 of the phase sequence table 2, and the PE of the plug is connected to the PE terminal of the measuring box 1.

[0032] The use process of the utility model is as follows:

[0033] Step one, according to the model of the measured refrigeration socket 8, replace the matched three-phase refrigeration plug 9, and make the above device;

[0034] Step two, insert the three-phase refrigeration plug 9 of the device into the refrigeration socket 8 to be verified, and connect the power supply of the refrigeration socket 8 to be verified;

[0035] Step three, read the count on the phase sequence table 2, and the correctness of the phase sequence of the measured three-phase refrigeration socket 8 can be judged (the CW lamp is bright for positive sequence, and the CCW lamp is bright for reverse sequence).

[0036] Of course, after the device is assembled, the correctness of the device connection needs to be verified, and the specific verification method is as follows: first, find a three-phase power supply, first use the phase sequence table 2 to measure the phase sequence (positive sequence) of the three-phase power supply, then use the assembled device to measure the phase sequence (positive sequence) of the power supply, if the two measurement results are consistent, it indicates that the connection of the device is correct, if not, only need to adjust the L1 and L2 of the terminal 3 in the measuring box 1 of the device until the phase sequence is consistent, after the double-number device connection verification is correct, the device can be put into use.

[0037] Compared with the prior art, the utility model has the following beneficial effects:

[0038] 1, a test device made of three-phase connection of the terminal of the three-phase refrigeration plug 9 matched with the refrigeration socket 8 through the connecting wire 6 and the phase sequence table 2 can conveniently and reliably verify the phase sequence of the three-phase refrigeration socket 8;

[0039] 2, the device adopts the three-phase refrigeration plug 9 of the plastic shell, ensures the safety of the operator, is not affected by the environment, and is applicable to any environment;

[0040] 3, The device uses method directly plugs the plug of the device on the socket to be checked, then reads the reading of the indicating light on the phase sequence table 2 (the CW light is bright for positive sequence, the CCW light is bright for reverse sequence), the checking procedure is simplified from the original 7 procedures to 3 procedures, effectively improves the checking efficiency, and electric shock can be avoided in the checking process;

[0041] 4, The device is portable, the volume is not large, one person can operate, and two people can also operate, and it is easy to store;

[0042] 5, The device is maintenance-free, and the service life (the service life mainly depends on the service life of the phase sequence table 2) is long, and each device can be used continuously for more than 5 years;

[0043] 6, The checking device can safely, reliably and accurately verify the phase sequence of the container socket, and improve the checking efficiency and checking accuracy.

[0044] The above examples are only exemplary embodiments of the utility model, and are not used to limit the utility model, and the protection scope of the utility model is limited by the claims. Those skilled in the art can make various modifications or equivalent replacements to the utility model within the spirit and protection scope of the utility model, and the modification or equivalent replacement should also be regarded as falling within the protection scope of the utility model.

Claims

1. A three-phase cold-socket phase sequence checking device, characterized in that: Including measuring box (1), phase sequence table (2), terminal (3), connecting wire (6) and three-phase refrigerator plug (9), the three terminal (3) of L1, L2 and L3 are fixedly installed in the measuring box (1), the phase sequence table (2) is fixedly installed on the panel of the measuring box (1), and the observation surface of the measurement result is outwardly arranged, the three measurement leads L1, L2 and L3 of the phase sequence table (2) are correspondingly connected and fixed on the three terminal (3) of L1, L2 and L3, the three-phase refrigerator plug (9) is matched with the measured refrigerator socket (8), and the three pins L1, L2 and L3 of the three-phase refrigerator plug (9) are respectively connected and fixed on the three terminal (3) of L1, L2 and L3 through the connecting wire (6).

2. A three-phase cold-plug socket phase sequence checking device according to claim 1, characterized in that: The measuring box (1) is also fixedly installed with a PE terminal (3) and a grounding bolt (5), the grounding bolt (5) is connected with the PE terminal (3) through the grounding wire (4), and the PE pin of the three-phase refrigerator plug (9) is also connected and fixed on the PE terminal (3) through the connecting wire (6).

3. A three-phase cold-plug socket phase sequence checking device according to claim 1, characterized in that: The measuring box (1) is an iron water-tight box.

4. A three-phase cold-socket phase sequence checking device according to claim 2, characterized in that: The connecting wire (6) adopts copper soft cable wire with RVV 3x1.5+E specification.

5. A three-phase cold-socket phase sequence checking device according to claim 2, characterized in that: The connecting wire (6) adopts copper soft cable wire with RVVP 3x1.5+E specification.

6. A three-phase cold-socket phase sequence checking device according to claim 2, characterized in that: The measuring box (1) is fixedly installed with a handle.

7. A three-phase cold-plug socket phase sequence checking device according to claim 4 or 5, characterized in that: The length of the connecting wire (6) is not less than 1.5 m.

Images