Pressure calibration connecting device and pressure verification device

Abstract

The utility model provides a pressure calibration connecting device and a pressure verification device, and relates to the technical field of pressure verification, and the pressure calibration connecting device comprises a connector housing, an electromagnetic coil, and a calibration connector and a transmitter connector which are arranged in a penetrating manner. The calibration connector is used for connecting a gas source output end of the pressure calibrator; the transmitter connector is used for connecting a pressure connector of a pressure transmitter; the connector shell at least surrounds the periphery of the calibration connector; and the electromagnetic coil is arranged between the calibration connector and the connector shell and is electrically connected with a power supply so as to enable the transmitter connector and the pressure connector to be attracted through electromagnetic attraction force. Therefore, the connector has the advantages of simplicity and convenience in operation and high connection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure calibration technical field especially relates to a pressure calibration connecting device and pressure calibration device. BACKGROUND

[0002] In the industrial field such as thermal power plant, the calibration of thermal instrument is an important link to ensure the normal operation of equipment, for example, the calibration of pressure transmitter. Pressure transmitter is mainly used for measuring pressure and converting it into corresponding electrical signal. In order to ensure the accuracy of its output value, it needs to be calibrated regularly according to the relevant national verification regulation. The calibration of pressure transmitter usually adopts pressure calibrator.

[0003] The connection mode of the existing pressure calibrator and pressure transmitter usually depends on mechanical connection, such as threaded connection, flange connection and the like. But these mechanical connection modes, although solve the connection problem to a certain extent, have the disadvantages of low efficiency and complex operation in the operation process.

[0004] Therefore, a pressure calibration connecting device and pressure calibration device with simple operation and high connection efficiency need to be designed. UTILITY MODEL CONTENTS

[0005] The utility model discloses a pressure calibration connecting device and pressure calibration device, and at least one of the above technical problems is solved, which has the advantages of simple operation and high connection efficiency.

[0006] In order to achieve the above object, the utility model provides a pressure calibration connecting device on one hand, which comprises: connecting head shell, electromagnetic coil and internally through arrangement calibration connecting head and transmitter connecting head;

[0007] The calibration connecting head is used for connecting the gas source output end of pressure calibrator;

[0008] The transmitter connecting head is used for connecting the pressure connector of pressure transmitter;

[0009] The connecting head shell at least surrounds the outer periphery arranged in calibration connecting head;

[0010] The electromagnetic coil is arranged between calibration connecting head and connecting head shell and is electrically connected with power supply, so that the transmitter connecting head and pressure connector are attracted by electromagnetic attraction.

[0011] Optionally, the pressure calibration connecting device further comprises an adaptive sealing force control module;The adaptive sealing force control module comprises:

[0012] Pressure sensor, set up in the calibration connecting head or the transmitter connecting head or the gas source output end of pressure calibrator;

[0013] A control circuit is electrically connected to the pressure sensor and the electromagnetic coil.

[0014] Optionally, the self-adaptive sealing force control module further comprises a current transformer disposed in the connector housing and electrically connected to the control circuit for measuring the real-time current of the electromagnetic coil.

[0015] Optionally, the control circuit comprises:

[0016] A signal processing unit for receiving and processing the output signals of the pressure sensor and the current transformer;

[0017] A driving unit connected to the signal processing unit for adjusting the current of the electromagnetic coil according to the processed signals to control the sealing force between the transmitter connector and the pressure connector.

[0018] Optionally, the transmitter connector has a connector leading groove matching the shape of the pressure connector.

[0019] Optionally, the contact bottom surface of the connector leading groove is provided with an elastic sealing ring.

[0020] Optionally, the elastic sealing ring is made of fluororubber or silicone rubber.

[0021] Optionally, the pressure calibration connection device further comprises a control switch connected in series with the electromagnetic coil.

[0022] The utility model further provides a pressure calibration device, comprising: a pressure calibration instrument and the pressure calibration connection device as described above;

[0023] The gas source output end of the pressure calibration instrument is connected to the calibration connector;

[0024] The control circuit is integrated into the pressure calibration instrument;

[0025] The control switch is arranged on the control panel of the pressure calibration instrument.

[0026] Optionally, the gas source output end of the pressure calibration instrument is connected to the calibration connector through a pressure guide pipe; the electromagnetic coil is connected to the control circuit through an electric wire, and the electric wire is arranged in parallel with the pressure guide pipe.

[0027] Compared with the prior art, the utility model has the advantages of:

[0028] The pressure calibration connecting device comprises a connecting head shell, an electromagnetic coil, and a calibration connecting head and a transmitter connecting head arranged through the inside, and the electromagnetic coil is electrically connected with a power supply between the calibration connecting head and the connecting head shell, so that the transmitter connecting head and the pressure connector can be attracted by electromagnetic force without manual operation such as traditional threaded or flange connection, manual operation and assembly time can be reduced, and the calibration connection of the pressure transmitter is faster and more efficient. In addition, the transmitter connecting head and the pressure connector can be attracted or separated by turning on or off the power supply, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0030] Figure 1 The present application is a pressure calibration device and pressure transmitter assembly structure schematic diagram, wherein the pressure calibration connecting device part in the figure is a perspective view;

[0031] Figure 2 The present application is a self-adaptive sealing force control module and electromagnetic coil structure block diagram.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1000-pressure calibration device;

[0034] 100-pressure calibration connecting device;

[0035] 1-connecting head shell;

[0036] 2-calibration connecting head;

[0037] 3-transmitter connecting head;

[0038] 4-electromagnetic coil;

[0039] 5-self-adaptive sealing force control module; 51-pressure sensor; 52-control circuit; 521-signal processing unit; 522-driving unit; 53-current transformer;

[0040] 6-elastic sealing ring;

[0041] 200-pressure calibration instrument; 210-pressure guide pipe; 220-control panel; 230-control switch; 240-wire;

[0042] 300 - pressure transmitter; 310 - pressure tap. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential" and the like in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the first, second, etc. words are only for distinguishing the same or similar structures, and do not mean a certain special limitation on the arrangement order or connection relationship.

[0045] Please refer to Figures 1 to 2 The embodiment of the present application provides a pressure calibration connecting device 100, which comprises a connecting head shell 1, an electromagnetic coil 4, a calibration connecting head 2 and a transmitter connecting head 3. The calibration connecting head 2 and the transmitter connecting head 3 are provided through the inside.

[0046] The calibration connecting head 2 is used for connecting the gas source output end of the pressure calibrator 200. Specifically, the calibration connecting head 2 connects the pressure guide pipe 210 of the pressure calibrator 200, so that the standard pressure provided by the pressure calibrator 200 can be transmitted to the calibrated pressure transmitter 300. The connection mode of the calibration connecting head 2 and the pressure guide pipe 210 can be threaded connection, clamping, welding or magnetic attraction connection, etc., which is not specifically limited here. The specific structure of the pressure calibrator 200 is prior art, so it will not be expanded here.

[0047] The transmitter connecting head 3 is used for connecting the pressure tap 310 of the pressure transmitter 300. In this way, the standard pressure provided by the pressure calibrator 200 can be transmitted to the pressure transmitter 300 to realize calibration or detection. Specifically, the pressure tap 310 is a component provided with the pressure transmitter 300. Specifically, in the present embodiment, the pressure tap 310 is a ferromagnetic tap that can be attracted by a magnet.

[0048] The connector housing 1 is arranged around the outer periphery of the calibration connector 2, and is connected to the end of the transmitter connector 3 away from the pressure transmitter 300. It protects the calibration connector 2 and provides a mounting space for the solenoid 4. Of course, in other embodiments, the connector housing 1 is arranged around the outer periphery of the calibration connector 2 and the transmitter connector 3 to protect both. In this embodiment, the end of the connector housing 1 away from the transmitter connector 3 surrounds the entire calibration connector 2 and part of the pressure guide pipe 210 to protect the connection position of the calibration connector 2 and the pressure guide pipe 210. It is understood that the connector housing 1 is made of insulating material.

[0049] The solenoid 4 is arranged between the calibration connector 2 and the connector housing 1, and is electrically connected to the power supply (not shown) to attract the transmitter connector 3 and the pressure connector 310 by electromagnetic force. In this way, when the solenoid 4 is powered on, it can quickly automatically attract the pressure connector 310 and the transmitter connector 3, and when the solenoid 4 is powered off, the pressure connector 310 and the transmitter connector 3 can be automatically separated, improving the convenience of operation.

[0050] With the above technical solution, without using traditional manual operation methods such as threaded or flange connection, the transmitter connector 3 and the pressure connector 310 can be attracted by electromagnetic force, which can significantly reduce manual operation and assembly time, making the calibration connection of the pressure transmitter 300 faster and more efficient. In addition, the transmitter connector 3 and the pressure connector 310 can be attracted or separated by turning on and off the power, which is more convenient to operate.

[0051] In order to avoid the mismatch between the sealing force provided by the electromagnetic force and the calibration pressure, resulting in insufficient sealing when high pressure is calibrated or too tight sealing when low pressure is calibrated. Alternatively, please refer to Figure 1 and Figure 2 In this embodiment, the pressure calibration connection device 100 further comprises an adaptive sealing force control module 5. The adaptive sealing force control module 5 comprises a pressure sensor 51 and a control circuit 52. The pressure sensor 51 is arranged in the gas source output end of the calibration connector 2 or the transmitter connector 3 or the pressure calibrator 200; to monitor the pressure change of the gas source output end in real time, and feed back the data to the control circuit 52. The control circuit 52 is electrically connected to the pressure sensor 51 and the solenoid 4; for adjusting the size of the electromagnetic force of the solenoid 4 according to the monitoring data of the pressure sensor 51, to ensure that the sealing force between the transmitter connector 3 and the pressure connector 310 meets the required standard, preventing gas leakage or loose connection.

[0052] Alternatively, please refer to Figure 2In the embodiment, the adaptive sealing force control module 5 further comprises a current transformer 53. The current transformer 53 is arranged in the connector housing 1 and is electrically connected with the control circuit 52, and is used for measuring the real-time current of the electromagnetic coil 4. In this way, the adaptive sealing force control module 5 can not only acquire the pressure change of the gas source output end in real time, but also can acquire the current change of the electromagnetic coil 4 in real time. Therefore, the sealing force is accurately controlled.

[0053] Optionally, referring to Figure 2 In the embodiment, the control circuit 52 comprises a signal processing unit 521 and a driving unit 522. The signal processing unit 521 is used for receiving and processing the output signals of the pressure sensor 51 and the current transformer 53; and the driving unit 522 is connected with the signal processing unit 521 and is used for adjusting the current of the electromagnetic coil 4 according to the processed signals, so as to control the sealing force between the transmitter connector 3 and the pressure connector 310. Specifically, the control circuit 52 is a prior art, and thus will not be described in detail here.

[0054] Optionally, in the embodiment, the transmitter connector 3 has a connector leading groove which is matched with the shape of the pressure connector 310. In this way, the transmitter connector 3 can be more closely attached to the pressure connector 310, so as to reduce the risk of leakage at the connection and improve the accuracy and reliability of pressure calibration.

[0055] In order to further improve the sealing performance and avoid the risk of leakage in a high-pressure environment, optionally, referring to Figure 1 In the embodiment, the contact bottom surface of the connector leading groove is provided with an elastic sealing ring 6. Specifically, the elastic sealing ring 6 is made of fluororubber or silicone rubber.

[0056] In order to facilitate the opening and closing control of the electromagnetic coil 4, optionally, referring to Figure 1 In the embodiment, the pressure calibration connection device 100 further comprises a control switch 230 connected in series with the electromagnetic coil 4.

[0057] Optionally, referring to Figure 1 and Figure 2 Another aspect of the embodiment of the utility model provides a pressure calibration device 1000, including pressure calibration instrument 200 and pressure calibration connection device 100 as described above. Wherein, the gas source output end of pressure calibration instrument 200 connects calibration connector 2, control circuit 52 is integrated into pressure calibration instrument 200, control switch 230 is arranged on the control panel 220 of pressure calibration instrument 200. Since the pressure calibration device 1000 has all the structures and connection relations of the pressure calibration connection device 100, it has all the advantages of the pressure calibration connection device 100, which will not be described here.

[0058] Optionally, in the embodiment, the gas source output end of the pressure calibrator 200 is connected to the calibration connector 2 through the pressure guide pipe 210; the electromagnetic coil 4 is connected to the control circuit 52 through the electric wire 240, and the electric wire 240 is arranged in parallel with the pressure guide pipe 210. In this way, the wiring can be optimized, and the neatness is improved.

[0059] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure calibration connection device, characterized in that, Includes: connector housing (1), electromagnetic coil (4), and internally through-mounted calibration connector (2) and transmitter connector (3); The calibration connector (2) is used to connect to the air source output end of the pressure calibrator (200); The transmitter connector (3) is used to connect the pressure connector (310) of the pressure transmitter (300); The connector housing (1) is located at least around the outer periphery of the calibration connector (2); The electromagnetic coil (4) is disposed between the calibration connector (2) and the connector housing (1) and is electrically connected to the power supply so that the transmitter connector (3) is attracted to the pressure connector (310) by electromagnetic attraction.

2. The pressure calibration connection device as described in claim 1, characterized in that, It also includes an adaptive sealing force control module (5); the adaptive sealing force control module (5) includes: A pressure sensor (51) is installed in the gas source output terminal of the calibration connector (2), the transmitter connector (3), or the pressure calibrator (200); The control circuit (52) is electrically connected to both the pressure sensor (51) and the electromagnetic coil (4).

3. The pressure calibration connection device as described in claim 2, characterized in that, The adaptive sealing force control module (5) also includes a current transformer (53) disposed inside the connector housing (1) and electrically connected to the control circuit (52) for measuring the real-time current of the electromagnetic coil (4).

4. The pressure calibration connection device as described in claim 3, characterized in that, The control circuit (52) includes: The signal processing unit (521) is used to receive and process the output signals of the pressure sensor (51) and the current transformer (53); The drive unit (522), connected to the signal processing unit (521), is used to adjust the current of the electromagnetic coil (4) according to the processed signal, so as to control the sealing force between the transmitter connector (3) and the pressure connector (310).

5. The pressure calibration connection device as described in claim 1, characterized in that, The transmitter connector (3) has a connector inlet groove that matches the shape of the pressure connector (310).

6. The pressure calibration connection device as described in claim 5, characterized in that, An elastic sealing ring (6) is provided on the bottom contact surface of the connector guide groove.

7. The pressure calibration connection device as described in claim 6, characterized in that, The elastic sealing ring (6) is made of fluororubber or silicone rubber.

8. The pressure calibration connection device as described in claim 2, characterized in that, It also includes a control switch (230) connected in series with the electromagnetic coil (4).

9. A pressure calibration device, characterized in that, include: Pressure calibrator (200) and pressure calibration connection device as described in claim 8; The air source output end of the pressure calibrator (200) is connected to the calibration connector (2); The control circuit (52) is integrated into the pressure calibrator (200); The control switch (230) is located on the control panel (220) of the pressure calibrator (200).

10. The pressure calibration device as described in claim 9, characterized in that, The air source output end of the pressure calibrator (200) is connected to the calibration connector (2) through the pressure guide tube (210); the electromagnetic coil (4) is connected to the control circuit (52) through the wire (240), and the wire (240) and the pressure guide tube (210) are arranged in parallel.

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