Nuclear power plant swing check valve position measuring device

Abstract

The utility model discloses a nuclear power plant swing -type check valve valve position measuring device, include: installation component, installation component can be dismantled and installed in the pin shaft of nuclear power plant swing -type check valve, installation component includes the mounting seat and fastener, the mounting seat includes opposite upper surface and lower surface, the upper surface is the plane, the lower surface is the arc surface of adapting with the pin shaft of nuclear power plant swing -type check valve, the fastener is connected with the mounting seat for with the mounting seat fixed in the pin shaft of nuclear power plant swing -type check valve, at least one inclination sensor, the inclination sensor installs on the upper surface, at least one level meter, the level meter installs on the upper surface. This nuclear power plant swing -type check valve valve position measuring device installation convenient, need not to carry out the reform to nuclear power plant swing -type check valve, can reduce the cost, can directly measure the valve position data of nuclear power plant swing -type check valve, and high -efficient convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power technology field especially relates to a nuclear power plant swing check valve valve position measuring device. BACKGROUND

[0002] Check valve is a kind of one-way fluid valve, its main function is to prevent fluid reverse flow, i.e. only allow fluid to flow in one direction, prevent fluid backflow. The working principle of check valve is to use the pressure difference of fluid to control the opening and closing of valve clack, when fluid flows in the predetermined direction, fluid pressure pushes away valve clack, and makes valve open;When fluid flows reversely, valve clack closes under the action of fluid pressure and its own gravity (or spring force), and prevents fluid backflow. Check valve can be divided into lift check valve, swing check valve, disc check valve, ball check valve, diaphragm check valve and other types according to different structure and working principle.

[0003] Swing check valve is a widely used check valve type, its valve clack is connected with valve arm, and can rotate a certain angle around valve shaft, when fluid in pipeline flows in the specified direction, the pressure difference between inlet and outlet of valve clack is greater than the opening force of valve clack, valve clack will be pushed away from valve seat, and valve is in open state;When the pressure difference between inlet and outlet of valve clack decreases to a certain time, valve clack falls, and valve is in closed state;When fluid flows reversely, outlet side pressure of valve clack is greater than inlet side, and the pressure difference tightly presses valve clack on valve seat, and fluid cannot pass through valve.

[0004] Based on transient flow angle analysis, check valve closes too fast, which will cause the pressure in pipe system to suddenly rise, and will produce great pressure impact on valve body;When check valve closes slowly, the impact of backflow water at the end of valve closing stage will produce high water hammer. Therefore, the opening and closing performance of check valve is crucial to the safety of valve and pipe system.

[0005] The current method for measuring the operating state of check valve mainly includes two types: 1, judging the operating state of check valve by measuring the fluid state of pipe system, 2, judging the valve state by measuring the valve rod thrust.

[0006] The first method for measuring the fluid state of pipe system generally needs to measure at least valve front pressure, valve rear pressure, fluid flow rate and other fluid state quantities, this method generally needs to be considered in the design stage of pipe system, and pressure and flow sensor are arranged at corresponding positions of pipe system, such as valve state monitoring through subsequent pipe system modification, pipe modification design needs to be carried out again, and the work amount is large.

[0007] Method two measures the valve stem thrust force, as described in the patent "a slow closing check valve and slow closing check valve monitoring system" (publication number: CN 107489795), through the lower plate first pressure sensor arranged on the valve stem, detects whether the lower spring can generate enough thrust on the lower plate, judges the state of the check valve, this method is the design of the slow closing mechanism and valve position monitoring system of the lifting type check valve, this method is not applicable to the swing check valve, and this patent is a design optimization of the check valve, only through the replacement of the entire valve to realize the monitoring of the check valve position, which cannot be realized by optimizing and reforming the existing valve. Utility model content

[0008] The technical problem to be solved by the utility model lies in providing a nuclear power plant swing check valve position measuring device.

[0009] The utility model adopts the technical scheme in the technical problem thereof: a nuclear power plant swing check valve position measuring device is constructed, which comprises:

[0010] The installation assembly is detachably installed on the pin shaft of the nuclear power plant swing check valve, and the installation assembly comprises an installation seat and a fastener.

[0011] At least one inclination sensor is installed on the upper surface.

[0012] At least one level meter is installed on the upper surface.

[0013] In some embodiments, the fastener comprises a strap fastened by a buckle or a fixing buckle.

[0014] In some embodiments, the installation seat has opposite first and second side surfaces.

[0015] The fastener comprises a clamp, the clamp comprises a first arc-shaped body and a second arc-shaped body, the first end of the first arc-shaped body is rotationally connected with the first side surface of the installation seat, the first end of the second arc-shaped body is rotationally connected with the second side surface of the installation seat, and the second end of the first arc-shaped body is detachably connected with the second end of the second arc-shaped body.

[0016] In some embodiments, the inner side surfaces of the first and second arc-shaped bodies are provided with protective pads.

[0017] In some embodiments, the protective pads comprise silica gel protective pads.

[0018] In some embodiments, the mounting seat is made of brass.

[0019] In some embodiments, the roughness of the lower surface is Ra1.6, Ra3.2 or Ra6.3.

[0020] In some embodiments, the nuclear power plant swing check valve position measuring device further comprises a data acquisition instrument connected with the tilt angle sensor, and a host computer connected with the data acquisition instrument.

[0021] In some embodiments, the data acquisition instrument is connected with the tilt angle sensor through an RS232 data transmission line or an RS485 data transmission line.

[0022] In some embodiments, the host computer is connected with the data acquisition instrument through wired or wireless communication.

[0023] The nuclear power plant swing check valve position measuring device has the following beneficial effects: convenient installation, no need to modify the nuclear power plant swing check valve, low cost, direct measurement of the valve position data of the nuclear power plant swing check valve, high efficiency and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0025] Figure 1 It is a structure schematic view of the nuclear power plant swing check valve;

[0026] Figure 2 It is an application schematic view of the nuclear power plant swing check valve position measuring device in some embodiments of the utility model;

[0027] Figure 3 It is a structure schematic view of the nuclear power plant swing check valve position measuring device in some embodiments of the utility model;

[0028] Figure 4 It is a top view of the nuclear power plant swing check valve position measuring device in some embodiments of the utility model;

[0029] Figure 5 It is a structure schematic view of the nuclear power plant swing check valve position measuring device in some embodiments of the utility model. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the present technical solution, and do not indicate that the indicated device or element must have a particular direction, therefore, it cannot be understood as a limitation on the present application.

[0031] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the following description, specific details are presented such as specific system structures, techniques, etc. in order to thoroughly understand the embodiments of the present application, but those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed description of well-known systems, devices, circuits and methods is omitted to avoid unnecessary details that hinder the description of the present application.

[0033] As Figure 1As shown, the nuclear power plant swing check valve 100 is composed of a valve body 101, a valve cover 102, a valve seat 103, a valve disc 104, a valve arm 105, a pin shaft 106, etc. When the fluid in the pipeline flows in the designated direction, a pressure difference is generated in front and back of the valve disc 104, and when the pressure difference is greater than the opening force of the valve disc 104, the valve disc 104 is opened and drives the valve arm 105 and the pin shaft 106 to rotate; when the fluid velocity decreases or the direction of flow changes, the force of the fluid acting on the valve disc 104 is less than the weight of the valve disc 104 and the valve arm 105, so that the valve disc 104 falls back to the valve seat 103 and the valve is closed. In the process of opening and closing the valve, the pin shaft 106 rotates together with the valve disc 104 and the valve arm 105, so that a set of nuclear power plant swing check valve position measuring device closely matched with the pin shaft 106 is installed at the pin shaft 106, so as to measure the rotation angle of the valve disc 104, and then the valve opening degree can be judged.

[0034] Referring to Figures 2 to 4 The utility model discloses a kind of nuclear power plant swing check valve position measuring device, it includes installation component 10, at least one inclination sensor 20, at least one level 30.

[0035] The installation component 10 can be detachably installed on the pin shaft of the nuclear power plant swing check valve, and the installation component 10 includes a mounting seat 11 and a fastener 12. The mounting seat 11 includes opposite upper and lower surfaces 111 and 112. The upper surface 111 is planar, and the lower surface 112 is an arc surface that matches the pin shaft of the nuclear power plant swing check valve. The fastener 12 is connected to the mounting seat 11 and used to fix the mounting seat 11 to the pin shaft 106 of the nuclear power plant swing check valve 100.

[0036] The inclination sensor 20 is installed on the upper surface 111 and can be detachably connected, such as by bolts or screws. The inclination sensor 20 is a measurement sensor based on MEMS (Micro-Electro-Mechanical System) technology. It measures the angle between the gravity vector of the sensor and the Earth's gravitational field, achieving angle measurement of the pin shaft 106. Of course, other types of inclination sensors can also be selected according to actual needs, which are not limited here.

[0037] The level 30 is installed on the upper surface 111. The level 30 serves as an auxiliary device during installation, ensuring that the inclination sensor 20 is installed horizontally.

[0038] As Figure 3As shown, the mounting seat 11 is made of brass, which is softer than the pin shaft 106 and other components, and is less likely to cause wear to the pin shaft 106 and other components. Of course, the mounting seat 11 can also be made of other materials, such as stainless steel, which is not specifically limited here. The roughness of the lower surface 112 of the mounting seat 11 is Ra1.6, Ra3.2, or Ra6.3. Specifically, the mounting seat 11 is generally an arched support, the upper surface 111 of which is a flat surface on which the tilt sensor 20 and the level 30 can be mounted, and the lower surface 112 of which can be an arc surface, such as a circular arc surface, which has a radius of curvature consistent with the radius of the pin shaft 106 and can be closely fitted with the pin shaft 106. The lower surface 112 of the mounting seat 11 has a certain roughness, which can prevent the mounting seat 11 from sliding relative to the pin shaft 106 and improve the mounting stability.

[0039] As shown in FIGS. 1 and 2, Figure 3 and Figure 4 In some embodiments, the fastener 12 includes a strap that is fastened by a buckle or a fixing buckle. The strap is a flexible strap that can be made of plastic or rubber, which can tightly fix the mounting seat 11 on the pin shaft 106, and the strap can adopt various forms such as a buckle or a fixing buckle, which facilitates the fixing and dismounting of the mounting seat 11.

[0040] As shown in FIGS. 1 and 2, Figure 5 In other embodiments, the mounting seat 11 has opposite first and second side surfaces, and the fastener 12 includes a clamp that includes a first arc-shaped body 121 and a second arc-shaped body 122. The first end of the first arc-shaped body 121 is rotatably connected to the first side surface of the mounting seat 11, for example, by a rotating shaft seat. The first end of the second arc-shaped body 122 is rotatably connected to the second side surface of the mounting seat 11, for example, by a rotating shaft seat. The second end of the first arc-shaped body 121 and the second end of the second arc-shaped body 122 are detachably connected, for example, the second end of the first arc-shaped body 121 extends radially outwardly with a first connecting lug 1211, the second end of the second arc-shaped body 122 extends radially outwardly with a second connecting lug 1221, and the first connecting lug 1211 and the second connecting lug 1221 are connected and fixed by cooperating with a screw or a screw nut.

[0041] As shown in FIGS. 1 and 2, Figure 5 The inner side surfaces of the first arc-shaped body 121 and the second arc-shaped body 122 are provided with a protective pad 123. For example, the protective pad 123 can be a silica gel protective pad, which can be pressed against the pin shaft 106 when the first arc-shaped body 121 and the second arc-shaped body 122 are connected and fixed to each other, so that the mounting seat 11 is more stably mounted, and the mounting assembly 10 does not cause damage to the pin shaft 106.

[0042] As shown in FIGS. 1 and 2, Figure 3As shown, in some embodiments, the nuclear power plant swing check valve valve position measuring device further comprises a data acquisition instrument 40 connected with the tilt angle sensor 20, and a host computer 50 connected with the data acquisition instrument 40. In some embodiments, the data acquisition instrument 40 is connected with the tilt angle sensor 20 through an RS232 data transmission line or an RS485 data transmission line. The data acquisition instrument 40 transmits data through a data transmission line such as an RS232 data transmission line or an RS485 data transmission line to collect and process the data collected by the tilt angle sensor 20. The data acquisition instrument 40 can be a data acquisition instrument of the prior art. In addition, the data acquisition instrument 40 can also be connected with the tilt angle sensor 20 in a wireless manner. The tilt angle sensor 20 and the data acquisition instrument 40 can be provided with a communication module to facilitate wireless communication connection and reduce wiring. The communication module is not limited to a 3G / 4G / 5G module, a WIFI module, a ZigBee module, LoRa, NB-IoT, Bluetooth, etc.

[0043] In some embodiments, the host computer 50 is connected with the data acquisition instrument 40 through wired or wireless communication. The host computer 50 can be a PLC industrial computer, but is not limited thereto. The host computer 50 and the data acquisition instrument 40 can be provided with a communication module to facilitate wireless communication connection and reduce wiring. The communication module is not limited to a 3G / 4G / 5G module, a WIFI module, a ZigBee module, LoRa, NB-IoT, Bluetooth, etc.

[0044] The nuclear power plant swing check valve valve position measuring device is applied as follows:

[0045] Before the valve is planned to be opened, the staff can quickly and conveniently install the installation assembly 10 at the pin shaft 106 of the nuclear power plant swing check valve 100. With the action of fluid, the valve is gradually opened, the valve disc 104 drives the valve arm 105 and the pin shaft 106 to rotate, thereby driving the installation assembly 10 at the pin shaft 106 and the tilt angle sensor 20 to rotate. The tilt angle sensor 20 can collect the rotation angle relative to the initial position in real time and send the collected data to the data acquisition instrument 40. The data acquisition instrument 40 can convert the electrical signal of the tilt angle sensor 20 into a numerical form of measurement result and send the result to the host computer 50. The host computer 50 can record and analyze the real-time valve position data of the valve and can record the seating process of the valve disc 104 in detail. When the data is abnormal, an alarm can be given to remind the staff.

[0046] When the valve is planned to be closed, the installation assembly 10 and the like can be quickly and conveniently installed at the pin shaft 106 of the swing check valve 100 of the nuclear power plant by the staff. As the fluid action is reduced, the valve is gradually closed under the action of the self-weight of the valve disc 104, the valve disc 104 drives the valve arm 105 and the pin shaft 106 to rotate, thereby driving the installation assembly 10 at the pin shaft 106 and the inclination sensor 20 to rotate, the inclination sensor 20 can collect the rotation angle relative to the initial position in real time, and send the collected data to the data acquisition instrument 40; the data acquisition instrument 40 can convert the electrical signal of the inclination sensor 20 into a numerical form of measurement result, and send the result to the upper computer 50; the upper computer 50 can record and analyze the real-time valve position data of the valve, and can record the seating process of the valve disc 104 in detail, and can alarm the staff when the data is abnormal.

[0047] The valve position measuring device for the swing check valve of the nuclear power plant can be used as a long-term online monitoring device of the valve, and can be combined with the sensor data of the pressure and flow in the pipeline to realize the acquisition of the valve characteristic curve, and is beneficial to the accurate control of the fluid characteristics of the pipeline system.

[0048] Understandably, the valve position measuring device for the swing check valve of the nuclear power plant can measure the state of the opening and closing process of the swing check valve 100 of the nuclear power plant, and can also be installed on the swing check valve 100 of the nuclear power plant for long-term monitoring.

[0049] The valve position measuring device for the swing check valve of the nuclear power plant has the following beneficial effects: the valve position measuring device for the swing check valve of the nuclear power plant is convenient to install, does not need to be transformed for the swing check valve of the nuclear power plant, can reduce the cost, can directly measure the valve position data of the swing check valve of the nuclear power plant, and is efficient and convenient.

[0050] Understandably, the above embodiments only express the preferred embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that, for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A nuclear power plant swing check valve position measuring device characterized by, The utility model relates to a nuclear power plant swing check valve valve position measuring device, including: The mounting assembly (10) is detachably installed to the pin shaft of the nuclear power plant swing check valve, and the mounting assembly (10) includes the mounting seat (11) and the fastener (12), the mounting seat (11) includes opposite upper surface (111) and lower surface (112), the upper surface (111) is plane, and the lower surface (112) is the arc surface that is adapted with the pin shaft of the nuclear power plant swing check valve;The fastener (12) is connected with the mounting seat (11), and is used for fixing the mounting seat (11) on the pin shaft of the nuclear power plant swing check valve; At least one inclination sensor (20) is installed on the upper surface (111); At least one level (30) is installed on the upper surface (111).

2. The nuclear power plant swing check valve position measurement device of claim 1, wherein, The fastener (12) includes a strap fastened by a buckle or a fixing buckle.

3. The nuclear power plant gate positioner for a swing check valve as set forth in claim 1, wherein, The mounting seat (11) has opposite first and second side surfaces. The fastener (12) includes a clamp including a first arc-shaped body and a second arc-shaped body, a first end of the first arc-shaped body is rotatably connected to the first side surface of the mounting seat (11), a first end of the second arc-shaped body is rotatably connected to the second side surface of the mounting seat (11), and a second end of the first arc-shaped body is detachably connected to a second end of the second arc-shaped body.

4. The nuclear power plant swing check valve position measurement device of claim 3, wherein, The inner side surfaces of the first and second arc-shaped bodies are provided with protective pads.

5. The nuclear power plant swing check valve position measurement device of claim 4, wherein, The protective pads include silica gel protective pads.

6. The nuclear power plant swing check valve position measurement device of claim 1, wherein, The mounting seat (11) is made of brass.

7. The nuclear power plant gate positioner of claim 1, wherein, The roughness of the lower surface (112) is Ra1.6, Ra3.2 or Ra6.

3.

8. The nuclear power plant gate positioner of claim 1, wherein, The nuclear power plant swing check valve valve position measuring device further includes a data acquisition instrument (40) connected to the inclination sensor (20), and an upper computer (50) connected to the data acquisition instrument (40).

9. The nuclear power plant gate positioner for a swing check valve as set forth in claim 8, wherein, The data acquisition instrument (40) is connected to the inclination sensor (20) through an RS232 data transmission line or an RS485 data transmission line.

10. The nuclear power plant swing check valve position measurement device of claim 8, wherein, The upper computer (50) is connected to the data acquisition instrument (40) through wired or wireless communication.

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