Signal switching device

Abstract

The utility model provides a signal switching device, which is suitable for being connected among a cable, an instrument to be tested and a testing device, is used for transmitting signals of the instrument to be tested to the testing device on the premise that power supply is not cut off, and comprises a shell, a signal transmitting device and a signal receiving device, an inner cavity, a first port, a second port and a third port are enclosed, the first port, the second port and the third port are communicated with the inner cavity, the first port is suitable for being opposite to the cable, the second port is suitable for being opposite to the tested instrument, and the third port is suitable for being opposite to the testing device; and the circuit is accommodated in the inner cavity and is suitable for being sequentially communicated with the cable, the tested instrument and the testing device through the first port, the second port and the third port respectively. According to the utility model, the number of devices required by instrument detection can be reduced, the measurement process is simplified, the risk of electrical connection damage is reduced, and signals of the tested instrument can be transmitted to the testing device on the premise of not disconnecting power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of electric signal output of a pressure transmitter, in particular to a signal switching device. Background Art

[0002] Pressure transmitters are a key monitoring device in demanding environments such as nuclear power plants, so it is necessary to accurately monitor their electrical signal output to ensure their reliability and performance. Since Class 1E pressure transmitters do not have an on-site display function, the traditional test method requires disconnecting the instrument cable from the terminal and then connecting it to the test equipment when it is implemented on-site to achieve on-site electrical signal reading. The process often requires the configuration of additional equipment, which is cumbersome and carries the risk of equipment damage.

[0003] Therefore, it is necessary to provide a simple and easy-to-operate solution to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a signal transfer device to reduce the number of devices required for instrument detection, simplify the measurement process, reduce the risk of electrical connection damage, and transfer the signal of the instrument under test to the test device without disconnecting the power supply.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A signal transfer device, suitable for being connected between a cable, a measured instrument and a test device, and used for transferring the signal of the measured instrument to the test device without disconnecting the power supply, the signal transfer device comprising:

[0007] A shell enclosing an inner cavity, the shell being provided with a first port suitable for connecting to the cable, a second port suitable for connecting to the instrument under test, and a third port suitable for connecting to the test device;

[0008] The circuit is accommodated in the inner cavity and is suitable for being connected with the cable, the instrument under test and the test device in sequence via the first port, the second port and the third port respectively.

[0009] In some embodiments of the present invention, the circuit includes:

[0010] A first wire, one end of which is suitable for being connected to the cable via the first port, and the other end of which is suitable for being connected to the test device via the third port;

[0011] A second wire, one end of which is suitable for being connected to the instrument under test via the second port, and the other end of which is suitable for being connected to the test device via the third port;

[0012] A third wire has one end adapted to be connected to the cable via the first port, and the other end adapted to be connected to the instrument under test via the second port.

[0013] In some embodiments of the present invention, the circuit further includes a capacitor connected between the first wire and the second wire.

[0014] In some embodiments of the present invention, the signal switching device further includes:

[0015] A first adapter plate, fixedly connected to a side of the inner cavity close to the first port, the first wire and the third wire passing through the first adapter plate;

[0016] The second adapter plate is fixedly connected to one side of the inner cavity close to the second port, and the second wire and the third wire pass through the second adapter plate.

[0017] In some embodiments of the present invention, at least one of the first adapter board and the second adapter board is made of a copper-clad polyimide glass fiber cloth laminate.

[0018] In some embodiments of the present invention, the signal switching device further includes:

[0019] A jack board is provided at the third port, and the first wire and the second wire are suitable for connecting to the test device via the jack board.

[0020] In some embodiments of the utility model, the jack board is provided with a contact pin, and the contact pin is used to be electrically connected to the cable.

[0021] In some embodiments of the utility model, the shell is cylindrical, the first port and the second port are respectively located at two ends of the cylindrical shell in the longitudinal direction, and the third port is located on the outer circumferential surface of the cylindrical shell.

[0022] In some embodiments of the utility model, the housing at the position of the first port and / or the second port is provided with a flange head, and the flange head is used to connect with the cable and / or the instrument under test.

[0023] In some embodiments of the present invention, the shell is made of 316 stainless steel.

[0024] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0025] The utility model provides a signal transfer device, which is suitable for being connected between a cable, a measured instrument and a test device, and is used to transfer the signal of the measured instrument to the test device without disconnecting the power supply, which can reduce the number of equipment required for instrument detection, simplify the measurement process, and reduce the risk of damage to the electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation plans of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of the signal transfer device provided by one embodiment of the utility model connected to the instrument under test;

[0028] Figure 2 for Figure 1 An enlarged schematic diagram of the signal transfer device in FIG.

[0029] Figure 3 for Figure 1 An enlarged schematic diagram of the signal transfer device in another viewing angle;

[0030] Figure 4 for Figure 1 Schematic diagram of the internal structure of the signal switching device.

[0031] The main reference numerals in the drawings of this application specification are described as follows:

[0032] 1-signal transfer device; 11-housing; 110-inner cavity; 111-first port; 112-second port; 113-third port; 121-first wire; 122-second wire; 123-third wire; 124-capacitor; 131-first adapter board; 132-second adapter board; 14-jack board; 15-flange head; 16-socket;

[0033] 2- Instrument under test. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] Any specific numerical value disclosed herein (including the endpoint of the numerical range) is not limited to the exact value of the numerical value, but should be understood to also cover values ​​close to the exact value, such as all possible numerical values ​​within the range of ±5% of the exact value. In addition, for the disclosed numerical range, the endpoint values ​​of the range, the endpoint values ​​and the specific point values ​​in the range, and the specific point values ​​can be arbitrarily combined to obtain one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed herein.

[0036] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by those skilled in the art. If a term is defined herein and its definition is different from the commonly understood meaning in the art, the definition herein shall prevail.

[0037] See also Figures 1 to 4 A signal transfer device 1 is suitable for being connected between a cable, a meter under test 2 and a test device, and is used for transferring the signal of the meter under test 2 to the test device without disconnecting the power supply. The signal transfer device 1 comprises: a shell 11, enclosing an inner cavity 110, and the shell 11 is provided with a first port 111 suitable for connecting to the cable, a second port 112 suitable for connecting to the meter under test 2 and a third port 113 suitable for connecting to the test device; a circuit is accommodated in the inner cavity 110, and is suitable for being connected to the cable, the meter under test 2 and the test device in sequence via the first port 111, the second port 112 and the third port 113 respectively.

[0038] Specifically, when in use, the first port 111 is connected to the cable, the second port 112 is connected to the instrument under test 2, and the third port 113 is connected to the test device, so that the cable can power the instrument under test 2 through the internal circuit of the signal transfer device 1, and while the instrument under test 2 is powered, the electrical signal of the instrument under test 2 can be transferred to a third-party test device to monitor the electrical signal and performance of the instrument under test 2.

[0039] It is worth noting that before using the test device to test various data parameters of the instrument under test 2, the signal adapter 1 is first assembled with the cable, the instrument under test 2 and the test device in the above manner. During the testing process of the test device, there is no need to perform various plugging and unplugging actions, which simplifies the measurement process and reduces the risk of damage to the electrical connection.

[0040] See also Figure 1 and 3 , Figure 1 and 3The schematic diagram of the structure of the signal transfer device 1 provided by a specific embodiment of the utility model is shown, and its appearance is roughly cylindrical, and the two ends of the cylinder are respectively a first port 111 and a second port 112, the first port 111 can be connected to a cable and / or a power supply, and the second port 112 can be connected to a measured instrument 2; and a third port 113 is provided on the outer circumference of the cylindrical shell 1, and the third port 113 can be connected to various test devices including a multimeter. It can be understood that the specific size parameters of the cylindrical shell 1 can be adjusted according to the actual application scenario and design standards.

[0041] It is worth noting that the specific types and specifications of the above-mentioned cables, the instrument under test 2 and the test device can be selected and adjusted according to the specific application scenario. The signal switching device provided by the utility model can provide signal switching function for various electrical equipment and has good versatility.

[0042] The above-mentioned signal transfer device provided by the utility model is suitable for being connected between a cable, a measured instrument 2 and a test device, and is used to transfer the signal of the measured instrument to the test device without disconnecting the power supply. It can reduce the number of equipment required for instrument detection, simplify the measurement process, and reduce the risk of damage to the electrical connection.

[0043] In some embodiments of the present invention, the above-mentioned instrument 2 to be tested may specifically be a pressure transmitter; and the above-mentioned testing device may specifically be a multimeter or other on-site testing equipment in some embodiments.

[0044] In some embodiments of the present invention, DCS can be used to provide the voltage supply required for the operation of the instrument under test. DCS refers to the control cabinet of the on-site user. The on-site detection equipment connection device has a jack, and the test device and the detection instrument are quickly connected through the connector. It is worth noting that the above circuit can be called "DCS remote on-site signal acquisition circuit" or "signal acquisition circuit" in some embodiments of the present invention.

[0045] See also Figure 4 In some embodiments of the utility model, the circuit includes: a first wire 121, one end of which is suitable for being connected to the cable via the first port 111, and the other end of which is suitable for being connected to the test device via the third port 113; a second wire 122, one end of which is suitable for being connected to the instrument under test 2 via the second port 112, and the other end of which is suitable for being connected to the test device via the third port 113; a third wire 123, one end of which is suitable for being connected to the cable via the first port 111, and the other end of which is suitable for being connected to the instrument under test 2 via the second port 112.

[0046] For details, see Figure 4 The first wire 121 is used to connect the cable with the test device so that the cable can supply power to the test device, or the test device can intercept and obtain real-time status parameters of the cable and / or power supply for operator monitoring; the second wire 122 is used to connect the instrument 2 under test with the test device; the third wire 123 is used to connect the cable with the instrument 2 under test so that the power supply can supply power to the instrument 2 under test via the cable and the third wire 123. It can be understood that the specific models, specifications and parameters of the first wire 121, the second wire 122 and the third wire 123 can be selected and adjusted according to the actual application scenario.

[0047] See also Figure 4 In some embodiments of the present invention, the circuit further includes a capacitor 124 connected between the first wire 121 and the second wire 122 to prevent signal crosstalk between the wires. It should be noted that the specific model, specification and parameters of the capacitor 124 can be selected and adjusted according to the actual application scenario.

[0048] See also Figure 4 In some embodiments of the utility model, the signal transfer device 1 further includes: a first transfer plate 131, fixedly connected to the side of the inner cavity 110 close to the first port 111, the first wire 121 and the third wire 123 pass through the first transfer plate 131; a second transfer plate 132, fixedly connected to the side of the inner cavity 110 close to the second port 112, the second wire 122 and the third wire 123 pass through the second transfer plate 132. The function of the above two transfer plates is to prevent the wires from excessively shaking or even getting tangled together, so that the relative positions of the various components inside the device can be more regular.

[0049] See also Figure 4 In some embodiments of the present invention, at least one of the first adapter board 131 and the second adapter board 132 is made of copper-clad polyimide glass fiber cloth laminate, which has good insulation properties, thereby ensuring stable and reliable performance of the overall product.

[0050] See also Figure 4 In some embodiments of the utility model, the signal transfer device 1 further includes: a jack board 14, which is arranged at the third port 113, and the first wire 121 and the second wire 122 are suitable for connecting to the test device via the jack board 14; it can be understood that the specific shape and specification of the jack board 14, as well as the number and distribution of the jacks, can be selected and adjusted according to actual application requirements.

[0051] See also Figure 2 and Figure 4In some embodiments of the present invention, a contact pin is provided in the jack board 14, and the contact pin is used to be electrically connected to the cable; it can be understood that the specific shape and specification of the contact pin can be selected and adjusted according to actual application requirements.

[0052] See also Figure 4 In some embodiments of the present invention, the housing 11 is cylindrical, the first port 111 and the second port 112 are respectively located at two ends of the cylindrical housing 11 in the longitudinal direction, and the third port 113 is located on the outer circumferential surface of the cylindrical housing 11. Specifically, the specific dimensions of the cylindrical housing 11, such as height and diameter, can be set and adjusted according to actual application scenarios.

[0053] In some other embodiments of the utility model, the housing 11 is also cylindrical, but the three ports are arranged on the outer circumference of the cylindrical housing 11; specifically, the three ports in this design concept can be arranged in a straight line or staggered. It is understandable that the relative position relationship of the three ports can be selected and adjusted according to the actual design standards and usage scenarios, so that the signal switching device 1 can be applied to a wider range of application environments.

[0054] See also Figures 1 to 4 In some embodiments of the utility model, the housing 11 at the position of the first port 111 and / or the second port 112 is provided with a flange head 15, and the flange head 15 is used to connect with the cable and / or the instrument under test; in some embodiments of the utility model, the flange head 15 can specifically be a spline structure, and more specific size and specification design can be selected and adjusted according to the actual application scenario.

[0055] In some embodiments of the present invention, the shell 11 is made of 316 stainless steel. It can be understood that the shell 11 made of this material has the advantages of high strength and corrosion resistance, and has good durability.

[0056] See also Figure 4 In some embodiments of the present invention, a socket 16 is provided at the first port 111 and / or the second port 112; when the socket 16 is provided at the first port 111, the socket 16 can be connected to a cable to supply power to the instrument 2 under test.

[0057] It is worth noting that in some embodiments of the utility model, the signal adapter 1 is used to detect the electrical signal output of the pressure transmitter. Compared with the traditional detection method, it is realized that no operation is required in the DCS, and the terminal signal reception and the need for field data collection are not affected; specifically, in the past, when the operator tested the instrument, it was necessary to manually disconnect the positive and negative poles of the cable connector from the field system, and then connect it in series with the standard resistor, multimeter, and 24V standard power supply, and then observe the multimeter indication value to determine the output of the instrument. Now, according to the actual use environment on site, the detection steps are simplified; when the signal adapter 1 provided by the utility model is used, the on-site personnel do not need to disconnect the cable, and can directly connect the multimeter through the detection device to read the reading, thus reducing the number of equipment required for the detection process and meeting the needs of on-the-spot testing.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims. In addition, the specification uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. The content of this specification should not be understood as a limitation on the utility model.

Claims

1. A signal transfer device (1), suitable for being connected between a cable, a measured instrument (2) and a test device, and used for transferring the signal of the measured instrument (2) to the test device without disconnecting the power supply, characterized in that: The signal switching device (1) comprises: A housing (11) enclosing an inner cavity (110), the housing (11) being provided with a first port (111) suitable for connecting to the cable, a second port (112) suitable for connecting to the instrument under test (2), and a third port (113) suitable for connecting to the test device; The circuit is accommodated in the inner cavity (110) and is adapted to be sequentially connected to the cable, the instrument under test (2) and the test device via the first port (111), the second port (112) and the third port (113).

2. The signal switching device (1) according to claim 1, characterized in that: The circuit comprises: a first wire (121), one end of which is suitable for being connected to the cable via the first port (111), and the other end of which is suitable for being connected to the test device via the third port (113); A second wire (122), one end of which is suitable for being connected to the instrument under test (2) via the second port (112), and the other end of which is suitable for being connected to the test device via the third port (113); A third wire (123) has one end adapted to be connected to the cable via the first port (111), and the other end adapted to be connected to the instrument under test (2) via the second port (112).

3. The signal switching device (1) according to claim 2, characterized in that: The circuit also includes a capacitor (124) connected between the first conductive line (121) and the second conductive line (122).

4. The signal switching device (1) according to claim 2, characterized in that: The signal switching device (1) further comprises: A first adapter plate (131) is fixedly connected to a side of the inner cavity (110) close to the first port (111), and the first wire (121) and the third wire (123) pass through the first adapter plate (131); The second adapter plate (132) is fixedly connected to one side of the inner cavity (110) close to the second port (112), and the second wire (122) and the third wire (123) pass through the second adapter plate (132).

5. The signal switching device (1) according to claim 4, characterized in that: At least one of the first adapter plate (131) and the second adapter plate (132) is made of a copper-clad polyimide glass fiber cloth laminate.

6. The signal switching device (1) according to claim 2, characterized in that: The signal switching device (1) further comprises: A socket board (14) is provided at the third port (113); the first wire (121) and the second wire (122) are suitable for being connected to the test device via the socket board (14).

7. The signal switching device (1) according to claim 6, characterized in that: The jack board (14) is provided with a contact pin, and the contact pin is used for electrically connecting with the cable.

8. The signal switching device (1) according to claim 1, characterized in that: The shell (11) is cylindrical, the first port (111) and the second port (112) are respectively located at two ends of the cylindrical shell (11) in the longitudinal direction, and the third port (113) is located on the outer peripheral surface of the cylindrical shell (11).

9. The signal switching device (1) according to claim 1 or 8, characterized in that: The housing (11) at the position of the first port (111) and / or the second port (112) is provided with a flange head (15), and the flange head (15) is used to connect with the cable and / or the instrument under test.

10. The signal switching device (1) according to claim 1 or 8, characterized in that: The shell (11) is made of 316 stainless steel.

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