Positioner convenient for pressure tapping and pneumatic control valve

Abstract

The utility model discloses a positioner convenient for pressure tapping and a pneumatic control valve, the positioner comprises a positioner body, a plurality of air source monitoring interfaces, a plurality of switching devices and a plurality of voltmeters, the air source monitoring interfaces are communicated with the positioner body; the switching device is respectively connected with the gas source monitoring interface and the voltmeter in a sealing manner; the switching device comprises a first switching port, a second switching port, a third switching port and a quick connector which are communicated with one another, the first switching port is connected with the gas source monitoring port in a sealed mode, the second switching port is connected with the voltmeter in a sealed mode, and the third switching port is connected with the quick connector in a sealed mode. The positioner convenient for pressure tapping is provided with the switching device, so that quick pressure tapping of external parts can be realized without dismounting parts of the positioner on the premise of normal use, the verification speed is improved, and the risk of foreign matter entering can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic regulating valve calibration, in particular to a positioner and a pneumatic regulating valve which are convenient for taking pressure. Background Art

[0002] The pneumatic control valve of a nuclear power plant is an essential component for realizing the function of the system in which it is located. Taking the pressurizer spray valve of a pressurized water reactor nuclear power plant as an example, the main function of the pneumatic control valve is to maintain the stable operating pressure of the reactor's primary circuit. Once the pneumatic control valve fails, the pressure of the reactor's primary circuit will be out of control, which will lead to overpressure or depressurization of the reactor's primary circuit. Overpressure will cause the primary circuit safety valve to operate, and the primary circuit coolant will be released into the containment, affecting the operation of the core. Depressurization will cause the primary circuit coolant to boil, affecting the core's residual heat, and there is even the possibility of core melting, which seriously affects the release of radioactivity from the nuclear power plant.

[0003] The pneumatic control valve consists of the valve body and the instrumentation and control accessories that drive it, including positioners, E / P (electrical converters), flow amplifiers, pressure reducing valves, solenoid valves, limit switches, etc. When the instrumentation and control accessories are abnormal, they need to be replaced and the valve body needs to be calibrated. In view of the importance of pneumatic control valves in nuclear power plants, when they fail, they need to respond quickly, and calibration is one of the most important links. When calibrating the valve body, it is necessary to measure the pressure in the instrumentation and control accessory pipeline to complete the calibration of the valve body.

[0004] At present, the calibration method is to take pressure from the positioner to the calibration device for pressure detection. During the pressure taking process, the pipeline joints of the instrumentation and control accessories need to be frequently disassembled and assembled, which increases the workload and radiation dose of personnel and affects the maintenance efficiency of the pneumatic control valve. In addition, frequent disassembly and assembly of the pipeline joints of the instrumentation and control accessories will increase the risk of foreign matter entering the positioner. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a positioner and a pneumatic regulating valve which are convenient for taking pressure.

[0006] The utility model solves the technical problem by adopting the following technical solution: a positioner convenient for taking pressure, comprising a positioner body, a plurality of gas source monitoring interfaces, a plurality of adapters and a plurality of voltmeters, wherein the gas source monitoring interfaces are connected to the positioner body, and the adapters are respectively sealed and connected to the gas source monitoring interfaces and the voltmeters;

[0007] The adapter device includes a first adapter interface, a second adapter interface, a third adapter interface and a quick connector that are interconnected. The first adapter interface is sealed and connected to the gas source monitoring interface, the second adapter interface is sealed and connected to the voltmeter, and the third adapter interface is sealed and connected to the quick connector.

[0008] Preferably, in the positioner for facilitating pressure taking described in the utility model, the outer diameter of the first adapter interface is smaller than or equal to the inner diameter of the gas source monitoring interface.

[0009] Preferably, in the positioner for facilitating pressure taking described in the utility model, the first adapter interface is provided with an external thread, and the gas source monitoring interface is provided with an internal thread matching the external thread.

[0010] Preferably, in the positioner for facilitating pressure taking described in the utility model, the first adapter is a screw hole provided with an external thread, and the size of the screw hole is 1 / 4NPT.

[0011] Preferably, in the positioner for facilitating pressure taking described in the utility model, the adapter device further comprises a first reducer adapter, a first end of the first reducer adapter is threadedly connected to the second adapter interface, and a second end of the first reducer adapter is connected to the voltmeter.

[0012] Preferably, in the positioner for facilitating pressure taking described in the utility model, the second adapter is provided with an internal thread, the size of which is 1 / 4NPT, and the size of the first reducer adapter is 1 / 4NPT external thread to 1 / 8NPT internal thread.

[0013] Preferably, in the positioner for facilitating pressure taking described in the utility model, the adapter device also includes a second reducer adapter, the first end of the second reducer adapter is threadedly connected to the third adapter interface, and the second end of the second reducer adapter is threadedly connected to the quick connector.

[0014] Preferably, in the positioner for facilitating pressure taking described in the utility model, the third adapter is provided with an internal thread, the size of which is 1 / 4NPT, and the size of the second reducer adapter is 1 / 4NPT external thread to 1 / 8NPT internal thread.

[0015] Preferably, in the positioner for facilitating pressure taking described in the utility model, the number of the gas source monitoring interfaces, the number of the adapter devices and the number of the voltmeters are 3 respectively.

[0016] The utility model also constructs a pneumatic regulating valve for easy pressure taking, including a valve body and an execution structure connected to the valve body. The pneumatic regulating valve also includes a positioner for easy pressure taking as described in any of the above items, and the positioner is connected to the execution structure.

[0017] By implementing the utility model, the following beneficial effects are achieved:

[0018] The utility model provides a convenient pressure-taking positioner with a switching device, which can realize rapid pressure taking of external parts without disassembling the parts of the positioner under the premise of normal use, thereby not only improving the calibration rate but also eliminating the risk of foreign matter entering.

[0019] The pneumatic control valve of the utility model includes a positioner that is convenient for taking pressure. There is no need to frequently disassemble and assemble the pipeline joints of the instrumentation and control accessories to calibrate the positioner, which can reduce the workload and radiation dose of personnel, improve the efficiency of positioner calibration, and thus improve the maintenance efficiency of the pneumatic control valve. It can also eliminate the risk of foreign matter entering the instrumentation and control accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 The utility model is a schematic structural diagram of a positioner for facilitating pressure taking according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] An embodiment of the utility model discloses a pneumatic regulating valve that is convenient for taking pressure, and can quickly measure the pressure in the pipeline of the pneumatic regulating valve during maintenance. The pneumatic regulating valve includes a valve body, an execution structure connected to the valve body, and a positioner that is convenient for taking pressure, and the positioner is connected to the execution structure. The valve body and the execution structure are both prior art, and are not described here, and are not shown in the figure.

[0027] See also Figure 1 , is a schematic diagram of the structure of the positioner, which includes a positioner body 1, a plurality of gas source monitoring interfaces 2, a plurality of adapters 3 and a plurality of voltmeters 4. The gas source monitoring interface 2 is connected to the positioner body 1, and the adapter 3 is sealedly connected to the gas source monitoring interface 2 and the voltmeter 4 respectively. Generally, the number of the gas source monitoring interfaces 2 of the positioner is 3, and accordingly, the number of the adapters 3 and the number of the voltmeters 4 are 3 respectively.

[0028] The adapter 3 includes a first adapter 31, a second adapter 32, a third adapter 33 and a quick connector 34 that are interconnected. The first adapter 31 is sealed and connected to the gas source monitoring interface 2 to connect the gas source. The second adapter 32 is sealed and connected to the voltmeter 4, so that the voltmeter 4 can monitor the gas source normally. The third adapter 33 is sealed and connected to the quick connector 34, which is convenient for the calibration device to quickly take pressure. Among them, the number of gas source monitoring interfaces 2, the number of adapters 3 and the number of voltmeters 4 are 3 respectively.

[0029] Further, the outer diameter of the first adapter 31 is less than or equal to the inner diameter of the gas source monitoring interface 2. The first adapter 31 is provided with an external thread, the gas source monitoring interface 2 is provided with an internal thread matching the external thread, and the first adapter 31 is inserted into the gas source monitoring interface 2 and screwed and fixed. Preferably, the first adapter 31 is a screw hole provided with an external thread, and its size is 1 / 4NPT.

[0030] Further, in order to facilitate the installation of the voltmeter 4, the adapter 3 in some embodiments further includes a first reducer adapter 35, the first end of the first reducer adapter 35 is threadedly connected to the second adapter port 32, and the second end of the first reducer adapter 35 is connected to the voltmeter 4. Preferably, the second adapter port 32 is provided with an internal thread, the size of which is 1 / 4NPT, the size of the first reducer adapter 35 is 1 / 4NPT external thread to 1 / 8NPT internal thread, and the first reducer adapter 35 is partially inserted into the second adapter port 32 and threadedly fixed.

[0031] Further, in order to facilitate the installation of the quick connector 34, the adapter 3 in some embodiments further includes a second reducer adapter 36, the first end of the second reducer adapter 36 is threadedly connected to the third adapter 33, and the second end of the second reducer adapter 36 is threadedly connected to the quick connector 34. Preferably, the third adapter 33 is provided with an internal thread, the size of which is 1 / 4NPT, the size of the second reducer adapter 36 is 1 / 4NPT external thread to 1 / 8NPT internal thread, and the second reducer adapter 36 is partially inserted into the third adapter 33 and threadedly fixed.

[0032] By implementing the utility model, the following beneficial effects are achieved:

[0033] The utility model is provided with a transfer device 3 for convenient pressure taking of the positioner, which can realize rapid pressure taking of the external parts without disassembling the parts of the positioner under the premise of meeting normal use, thereby not only improving the verification rate but also eliminating the risk of foreign matter entering.

[0034] The pneumatic control valve of the utility model includes a positioner that is convenient for taking pressure. There is no need to frequently disassemble and assemble the pipeline joints of the instrumentation and control accessories to calibrate the positioner, which can reduce the workload and radiation dose of personnel, improve the efficiency of positioner calibration, and thus improve the maintenance efficiency of the pneumatic control valve. It can also eliminate the risk of foreign matter entering the instrumentation and control accessories.

[0035] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A positioner for convenient pressure measurement, characterized in that: The device comprises a positioner body (1), a plurality of gas source monitoring interfaces (2), a plurality of adapters (3) and a plurality of voltmeters (4), wherein the gas source monitoring interfaces (2) are in communication with the positioner body (1), and the adapters (3) are respectively sealedly connected to the gas source monitoring interfaces (2) and the voltmeters (4); The adapter device (3) comprises a first adapter interface (31), a second adapter interface (32), a third adapter interface (33) and a quick connector (34) which are interconnected, the first adapter interface (31) being sealedly connected to the gas source monitoring interface (2), the second adapter interface (32) being sealedly connected to the voltmeter (4), and the third adapter interface (33) being sealedly connected to the quick connector (34).

2. The positioner for convenient pressure taking according to claim 1, characterized in that: The outer diameter of the first adapter interface (31) is smaller than or equal to the inner diameter of the gas source monitoring interface (2).

3. The positioner for convenient pressure taking according to claim 2, characterized in that: The first adapter port (31) is provided with an external thread, and the gas source monitoring port (2) is provided with an internal thread matching the external thread.

4. The positioner for convenient pressure taking according to claim 1, characterized in that: The first adapter (31) is a screw hole provided with an external thread, and its size is 1 / 4NPT.

5. The positioner for convenient pressure taking according to claim 1, characterized in that: The adapter device (3) further comprises a first diameter reducing adapter (35), a first end of the first diameter reducing adapter (35) being threadedly connected to the second adapter port (32), and a second end of the first diameter reducing adapter (35) being connected to the voltmeter (4).

6. The positioner for convenient pressure taking according to claim 5, characterized in that: The second adapter (32) is provided with an internal thread, the size of which is 1 / 4NPT, and the size of the first reducer adapter (35) is a 1 / 4NPT external thread to a 1 / 8NPT internal thread.

7. The positioner for convenient pressure taking according to claim 1, characterized in that: The adapter device (3) further comprises a second diameter reducing adapter (36), wherein a first end of the second diameter reducing adapter (36) is threadedly connected to the third adapter port (33), and a second end of the second diameter reducing adapter (36) is threadedly connected to the quick connector (34).

8. The positioner for convenient pressure taking according to claim 7, characterized in that: The third adapter (33) is provided with an internal thread, the size of which is 1 / 4NPT, and the size of the second reducer adapter (36) is a 1 / 4NPT external thread to a 1 / 8NPT internal thread.

9. The positioner for convenient pressure taking according to any one of claims 1 to 8, characterized in that: The number of the gas source monitoring interfaces (2), the number of the adapter devices (3), and the number of the voltmeters (4) are three respectively.

10. A pneumatic regulating valve for convenient pressure measurement, comprising a valve body and an execution structure connected to the valve body, characterized in that: The pneumatic regulating valve further comprises a positioner for facilitating pressure taking as described in any one of claims 1 to 9, and the positioner is connected to the execution structure.

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