Solenoid valve mounting rack, pneumatic control valve and nuclear power plant main feed water flow control system

Abstract

The utility model relates to an electromagnetic valve mounting frame, a pneumatic control valve and a nuclear power plant main feed water flow control system, the electromagnetic valve mounting frame comprises a first supporting arm and a second supporting arm, and the first supporting arm is provided with a first connecting hole; the first supporting arm is connected to the electromagnetic valve; the second supporting arm comprises a connecting part and a reinforcing part, and the connecting part is connected with the first supporting arm at an included angle; the reinforcing part is connected to one end of the connecting part away from the first supporting arm; two ends of the reinforcing part respectively extend along the width direction to form two wing parts, so that the projections of the wing parts towards the connecting part are positioned outside the connecting part; the reinforcing part is provided with a plurality of second connecting holes; the plurality of second connecting holes are arranged at intervals along the width direction of the reinforcing part; the at least one second connecting hole is arranged close to the wing part; the reinforcing part is connected to the pneumatic actuator. According to the pneumatic actuator, the stress at the joint of the reinforcing part and the pneumatic actuator can be dispersed, the pressure intensity borne by the pneumatic actuator is reduced, and the connection stability is improved.

Description

Technical Field

[0001] This application relates to the field of nuclear power plant equipment, and more particularly to a solenoid valve mounting bracket, a pneumatic regulating valve, and a nuclear power plant main feedwater flow control system. Background Technology

[0002] In nuclear power plants, the main feedwater system (ARE) supplies high-pressure feedwater heated under high pressure to the steam generator. The supply rate is regulated by a feedwater flow control system to maintain the secondary water level of the evaporator at a predetermined reference value that varies with the turbine load. The feedwater line is equipped with a pneumatic regulating valve, including a pneumatic actuator and a solenoid valve connected to the actuator. The solenoid valve controls the opening and closing of the actuator. In related technologies, the solenoid valve is fixedly mounted on a bracket of the pneumatic actuator, which connects the actuator's cylinder and valve seat. This design presents problems such as difficulty in installing the solenoid valve and unstable installation. Utility Model Content

[0003] This application provides a solenoid valve mounting bracket, a pneumatic regulating valve, and a nuclear power plant main feedwater flow control system to improve the installation stability of the solenoid valve while reducing the pressure on the pneumatic regulating valve.

[0004] In a first aspect, this application provides a solenoid valve mounting bracket for a pneumatic control valve in a nuclear power plant. The pneumatic control valve includes a pneumatic actuator and a solenoid valve, wherein the solenoid valve is connected to the pneumatic actuator. The solenoid valve mounting bracket includes:

[0005] A first support arm is provided with a first connection hole; the first support arm is used to be connected to a solenoid valve by a first fastener passing through the first connection hole.

[0006] The second support arm includes a connecting portion and a reinforcing portion. The connecting portion is connected to the first support arm at an angle. The reinforcing portion is connected to the end of the connecting portion away from the first support arm. The two ends of the reinforcing portion extend along the width direction to form two wings, such that the projection of the wings toward the connecting portion is located outside the connecting portion.

[0007] The reinforcing part is provided with a plurality of second connecting holes; the plurality of second connecting holes are spaced apart along the width direction of the reinforcing part; at least one second connecting hole is located near the wing; the reinforcing part is used to be connected to the pneumatic actuator by a second fastener passing through the second connecting hole.

[0008] Furthermore, the side of the wing away from the reinforcing part includes a first sidewall and a second sidewall, which are connected at an angle; the end of the second sidewall away from the first sidewall is connected to the side of the connecting part.

[0009] Furthermore, the second sidewall and the side of the connecting portion have a smooth transition.

[0010] Furthermore, the reinforcing part is arranged in a concave arc shape on the side opposite to the connecting part.

[0011] Furthermore, the width of the connecting portion gradually increases in the direction away from the first support arm.

[0012] Furthermore, there are three first connecting holes. One first connecting hole is located on the first support arm near the second support arm, and the other two first connecting holes are located on the first support arm away from the second support arm. The center line connecting the three first connecting holes forms an isosceles triangle.

[0013] Furthermore, there are three second connecting holes. One second connecting hole is located in the middle of the reinforcing part, and the other two second connecting holes are located in the two wings or near the two wings respectively.

[0014] Furthermore, the connecting part and the reinforcing part are integrally formed; the second support arm is flat.

[0015] And / or, the first support arm is flat;

[0016] And / or, the first support arm and the second support arm are integrally formed;

[0017] And / or, the first support arm and the second support arm are arranged perpendicularly.

[0018] Secondly, this application provides a pneumatic regulating valve, comprising:

[0019] The solenoid valve mounting bracket described above;

[0020] A pneumatic actuator includes a valve body and an actuator cylinder connected to the valve body. The actuator cylinder includes an upper cover and a lower cover, which are detachably connected by a second fastener and enclose a valve diaphragm chamber. A second support arm is attached to the upper cover on the side facing the first support arm and is connected to the upper cover by the second fastener.

[0021] A solenoid valve is connected to the first support arm via a first fastener; the length direction of the solenoid valve extends along the length direction of the first support arm.

[0022] Thirdly, this application provides a main feedwater flow control system for a nuclear power plant, comprising:

[0023] Main feed jellyfish pipe;

[0024] Each of the steam generators is connected to the main water supply header via a connecting pipe.

[0025] The regulating valve assembly includes a main regulating valve and a bypass regulating valve, which are arranged in parallel in the connecting pipeline; wherein both the main regulating valve and the bypass regulating valve are pneumatic regulating valves as described above.

[0026] The technical solution provided in this application has the following advantages compared with the prior art:

[0027] The solenoid valve mounting bracket of this application includes a first support arm and a second support arm. The second support arm mounts the solenoid valve mounting bracket to the pneumatic actuator, while the first support arm provides a mounting position for the solenoid valve. Thus, the solenoid valve can be quickly and stably installed on the pneumatic actuator using the mounting bracket. The first and second support arms are angled together, allowing for vertical installation of the solenoid valve and bringing it closer to the pneumatic actuator, reducing space requirements. In this application, a connecting portion connects the reinforcing portion to the first support arm. The reinforcing portion extends along its width to form two wings, the projection of which falls outside the connecting portion, reducing the weight of the connecting portion. At least one second connecting hole is located near the wings, increasing the area of ​​the reinforcing portion and distributing the force at the connection between the reinforcing portion and the pneumatic actuator, reducing the pressure on the pneumatic actuator and improving connection stability. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0031] Figure 1 This is a schematic diagram of the structure of a pneumatic regulating valve provided in an embodiment of this application;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure of the solenoid valve mounting bracket;

[0033] Figure 3 for Figure 2 Schematic diagram of the second support arm;

[0034] Figure 4 for Figure 2 A structural diagram from another angle;

[0035] Figure 5 This is a schematic diagram illustrating the working principle of a pneumatic control valve.

[0036] Figure 6 This is a schematic diagram of a nuclear power plant main feedwater flow control system provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] Solenoid valve mounting bracket 100, first support arm 1, first connecting hole 1a,

[0039] Second support arm 2, connecting part 21, reinforcing part 22, wing part 221, first side wall 2211, second side wall 2212, second connecting hole 2a, arc-shaped side 222.

[0040] Second fastener 3

[0041] Pneumatic actuator 200, valve body 201, actuator cylinder 202, upper cover 203, lower cover 204, mounting lug 205, solenoid valve 310, quick discharge valve 320, flow amplifier 330, positioner 340, filter pressure reducing valve 350, pressure reducing valve 360.

[0042] Main feedwater header 400, steam generator 500, main regulating valve 600, bypass regulating valve 700. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0045] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0046] Firstly, Figures 1 to 4 An embodiment of this application provides a solenoid valve mounting bracket 100 for a pneumatic regulating valve in a nuclear power plant. The pneumatic regulating valve includes a pneumatic actuator 200 and a solenoid valve 310, with the solenoid valve 310 connected to the pneumatic actuator 200. The solenoid valve mounting bracket 100 includes a first support arm 1 and a second support arm 2. The first support arm 1 has a first connecting hole 1a. The first support arm 1 is used to connect to the solenoid valve 310 via a first fastener passing through the first connecting hole 1a. The second support arm 2 includes a connecting portion 21 and a reinforcing portion 22, with the connecting portion 21 connected to the first support arm 1 at an angle. The reinforcing part 22 is connected to the end of the connecting part 21 away from the first support arm 1; the two ends of the reinforcing part 22 extend along the width direction to form two wings 221, so that the projection of the wings 221 toward the connecting part 21 is located outside the connecting part 21; the reinforcing part 22 is provided with a plurality of second connecting holes 2a; the plurality of second connecting holes 2a are spaced apart along the width direction of the reinforcing part 22; at least one second connecting hole 2a is provided close to the wing 221; the reinforcing part 22 is used to be connected to the pneumatic actuator 200 by a second fastener 3 passing through the second connecting hole 2a.

[0047] It is understood that the solenoid valve mounting bracket 100 of this application includes a first support arm 1 and a second support arm 2. The second support arm 2 mounts the solenoid valve mounting bracket 100 onto the pneumatic actuator 200, and the first support arm 1 provides a mounting position for the solenoid valve 310. Thus, the solenoid valve 310 can be quickly and stably mounted onto the pneumatic actuator 200 using the solenoid valve mounting bracket 100. The first support arm 1 and the second support arm 2 are arranged at an angle, which allows the solenoid valve 310 to be mounted vertically, and the solenoid valve 310 is closer to the pneumatic actuator 200, reducing space occupation. In this application, the reinforcing part 22 is connected to the first support arm 1 through the connecting part 21. The reinforcing part 22 extends along the width direction to form two wings 221. The projection of the wings 221 is outside the connecting part 21, thereby reducing the weight of the connecting part 21. At least one second connection hole 2a is provided near the wing 221, which increases the area of ​​the reinforcing part 22 and disperses the force at the connection between the reinforcing part 22 and the pneumatic actuator 200, reduces the pressure on the pneumatic actuator 200, and improves the stability of the connection.

[0048] In the technical solution of this application, the design of the wing 221 also extends the width of the reinforcing part 22, which makes the multiple second connecting holes 2a more dispersed along the width direction of the reinforcing part 22, and can disperse the force at the connection between the reinforcing part 22 and the pneumatic actuator 200.

[0049] For example, in the technical solution of this embodiment, the number of the second connecting holes 2a is three. One second connecting hole 2a is disposed in the middle position of the reinforcing part 22, and the other two second connecting holes 2a are respectively disposed in the two wings 221 or respectively disposed close to the two wings 221.

[0050] In other embodiments, the number of second connecting holes 2a may also be two, with the two second connecting holes 2a respectively located on the wing portion 221 or respectively located near the wing portion 221.

[0051] In this embodiment, the connecting part 21 and the reinforcing part 22 are integrally formed; the second support arm 2 is flat; the forming is simple and easy to process, for example, the shape and structure of the second support arm 2 can be formed by cutting. Furthermore, the flat second support arm can fit more closely to the mounting ear 205 of the pneumatic actuator 200, improving connection stability.

[0052] like Figure 2 As shown, in the technical solution of this embodiment, the first support arm 1 is in the shape of a flat plate; it can be understood that the flat plate shape of the first support arm 1 facilitates the connection between the solenoid valve 310 and the first support arm 1, and improves the connection stability.

[0053] like Figure 2As shown, in the technical solution of this embodiment, the first support arm 1 and the second support arm 2 are integrally formed; the integrally formed structure is simple to form and easy to process, and the connection between the first support arm 1 and the second support arm 2 has high stability.

[0054] like Figure 2 As shown, in the technical solution of this embodiment, the first support arm 1 and the second support arm 2 are arranged vertically.

[0055] like Figure 3 As shown, in this embodiment, the side of the wing 221 away from the reinforcing part 22 includes a first sidewall 2211 and a second sidewall 2212, which are connected at an angle. The end of the second sidewall 2212 away from the first sidewall 2211 is connected to the side of the connecting part 21. This arrangement can provide a more dispersed arrangement for the second connecting hole 2a while reducing the weight of the reinforcing part 22.

[0056] In this embodiment, the second sidewall 2212 smoothly transitions to the side of the connecting portion 21. (See reference) Figure 3 The first sidewall 2211 and the side of the connecting part 21 are designed to be coplanar, so that during processing and cutting, the first sidewall 2211 and the side of the connecting part 21 can be processed in the same step. Alternatively, when forming by mold, the mold design can be simplified. Furthermore, the smooth transition design avoids the formation of a jump-step shape, avoids the formation of a structure that is prone to stress concentration, and improves the strength and service life of the solenoid valve mounting bracket 100.

[0057] In this embodiment, the reinforcing part 22 is arranged in a concave arc shape on the side opposite to the connecting part 21. For example... Figure 3 As shown, the sidewall of the reinforcing part 22 away from the connecting part 21 is an arc-shaped side 222, which is concave towards the reinforcing part 22. This reduces the weight of the reinforcing part 22, and the inward arc design can adapt to... Figure 1 The shape of the upper and middle cover shell 203.

[0058] like Figure 3 As shown, in this embodiment, the width of the connecting portion 21 gradually increases in the direction away from the first support arm 1. This allows for a smooth transition from the first connecting arm to the wing 221 of the reinforcing portion 22, and also reduces the weight of the support arm.

[0059] like Figure 4As shown, in this embodiment, the number of first connecting holes 1a is three. One first connecting hole 1a is located on the first support arm 1 near the second support arm 2, and the other two first connecting holes 1a are located on the first support arm 1 away from the second support arm 2. The center line connecting the three first connecting holes 1a forms an isosceles triangle. This improves the connection stability between the solenoid valve 310 and the first support arm 1.

[0060] Secondly, such as Figure 1 As shown, this application also provides a pneumatic regulating valve, including a pneumatic actuator 200, a solenoid valve 310, and a solenoid valve mounting bracket 100 as described above. The specific structure of the solenoid valve mounting bracket 100 is as described in the above embodiments. Since this pneumatic regulating valve adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the pneumatic actuator 200 includes a valve body 201 and an actuating cylinder 202 connected to the valve body 201. The actuating cylinder 202 includes an upper cover shell 203 and a lower cover shell 204. The upper cover shell 203 and the lower cover shell 204 are detachably connected by a second fastener 3 and form a valve diaphragm chamber. The side of the second support arm 2 facing the first support arm 1 is attached to the upper cover shell 203 and connected to the upper cover shell 203 by the second fastener 3. The solenoid valve 310 is connected to the first support arm 1 by a first fastener. The length direction of the solenoid valve 310 extends along the length direction of the first support arm 1.

[0061] In the technical solution of this application embodiment, the solenoid valve 310 is mounted on the actuator cylinder 202 by the solenoid valve mounting bracket 100, so that the solenoid valve 310 can be closer to the actuator cylinder 202.

[0062] In this embodiment, the upper cover 203 and the lower cover 204 are respectively provided with mounting ears 205 around their peripheries. The two mounting ears 205 are correspondingly arranged and connected by a second fastener 3. In this embodiment, the second fastener 3 is a bolt, and the first fastener is a bolt.

[0063] The design of the mounting ear 205 not only facilitates the connection between the upper cover 203 and the lower cover 204, but also provides an installation position for the solenoid valve mounting bracket 100. Furthermore, no additional screws are required; the solenoid valve mounting bracket 100 can be directly installed onto the mounting ear 205 using the second fastener 3 that connects the upper cover 203 and the lower cover 204.

[0064] A pneumatic control valve uses compressed gas as a power source, including a pneumatic actuator 200, and uses accessories such as a positioner 340 and a solenoid valve 310 to drive the valve to achieve on / off or proportional regulation.

[0065] The pneumatic control valve is an air-to-open valve; it closes when the air supply is lost. The valve's pneumatic control circuit is as follows: Figure 5 As shown. The air source first distributes air through a four-way air distribution system. Part of the air is sent to the filter and pressure reducing valve 350, and after passing the pressure reduction and filtration, it is used to supply air to the positioner 340; part of the air is supplied to the solenoid valve 310; and part of the air is supplied to the flow amplifier 330 through the pressure reducing valve 360. The air pressure output by the positioner 340 is amplified by the flow amplifier 330 and enters the valve diaphragm chamber through the quick discharge valve 320. The pneumatic actuator 200 drives the valve core displacement with compressed air to achieve precise control of parameters such as medium flow rate and pressure. The solenoid valve 310 can control the opening and closing of the quick discharge valve 320 by demagnetization and excitation. During normal operation, both solenoid valves 310 are in the energized state (AB is energized and BC is demagnetized, C is atmospheric pressure). Under the action of the air source, the quick discharge valve AB is energized, and the control air pressure from the positioner 340 can enter the valve diaphragm chamber through the quick discharge valve 320 for normal valve control functions. If any solenoid valve 310 malfunctions and loses its magnetism, there will be no gas control for the fast discharge valve 320. The fast discharge valve 320 will shut down (BC will be on), and the gas in the valve diaphragm chamber will be discharged to the atmosphere, causing the valve to close rapidly, losing its feedwater function, and ultimately causing the reactor to shut down.

[0066] The solenoid valve 310 described in this application extends along the length of the first support arm 1. Thus, the solenoid valve mounting bracket 100 of this application can be used to mount a vertical solenoid valve 310, which avoids the problem of a single diode failure inside the horizontal solenoid valve 310 compared to the horizontal solenoid valve 310.

[0067] Thirdly, such as Figure 6 As shown, this application also provides a main feedwater flow control system for a nuclear power plant, including a main feedwater header 400, a steam generator 500, and a regulating valve assembly. Each steam generator 500 is connected to the main feedwater header 400 via a connecting pipe. The regulating valve assembly includes a main regulating valve 600 and a bypass regulating valve 700, which are arranged in parallel on the connecting pipe. Both the main regulating valve 600 and the bypass regulating valve 700 are pneumatic regulating valves as described above. The specific structure of this pneumatic regulating valve is as described in the above embodiments. Since this main feedwater flow control system for a nuclear power plant adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0068] For example, refer to Figure 6The function of the main feedwater flow control system (ARE) in a nuclear power plant is to control the feedwater flow to the steam generator 500, ensuring that the water level on the secondary loop side of the steam generator 500 remains at a set value that varies with the turbine load. The main feedwater flow control system primarily consists of a feedwater header and three regulating valve assemblies. Each regulating valve assembly comprises a 90% capacity main regulating valve 600 and a 15% capacity bypass regulating valve 700. Therefore, the main regulating valve 600 primarily handles water level regulation in the steam generator 500 under high-load operating conditions and remains closed under low-load conditions; the bypass regulating valve 700 is mainly used for water level control under low-load conditions and remains fully open under high-load conditions.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0075] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0076] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electromagnetic valve mounting bracket (100) for a pneumatic control valve of a nuclear power plant, said pneumatic control valve comprising a pneumatic actuator (200) and an electromagnetic valve (310), said electromagnetic valve (310) being connected with said pneumatic actuator (200), characterized in that, The electromagnetic valve mounting frame (100) comprises: A first support arm (1) is provided with a first connecting hole (1a); the first support arm (1) is used for being connected to the electromagnetic valve (310) through a first fastener penetrating the first connecting hole (1a); A second support arm (2) comprises a connecting part (21) and a reinforcing part (22); the connecting part (21) is connected to the first support arm (1) at an angle; the reinforcing part (22) is connected to one end of the connecting part (21) away from the first support arm (1); both ends of the reinforcing part (22) extend along the width direction to form two wing parts (221), so that the projection of the wing part (221) towards the connecting part (21) is located outside the connecting part (21); the reinforcing part (22) is provided with a plurality of second connecting holes (2a); the plurality of second connecting holes (2a) are arranged at intervals along the width direction of the reinforcing part (22); at least one second connecting hole (2a) is arranged close to the wing part (221); the reinforcing part (22) is used for being connected to the pneumatic actuator (200) through a second fastener (3) penetrating the second connecting hole (2a).

2. The solenoid valve mounting bracket (100) according to claim 1, characterized in that The side edge of the wing part (221) away from the reinforcing part (22) comprises a first side wall (2211) and a second side wall (2212); the first side wall (2211) and the second side wall (2212) are connected at an angle; one end of the second side wall (2212) away from the first side wall (2211) is connected to the side edge of the connecting part (21).

3. The solenoid valve mounting bracket (100) according to claim 2, characterized in that The second side wall (2212) and the side edge of the connecting part (21) are smoothly connected.

4. The solenoid valve mounting bracket (100) according to claim 1, characterized in that, The side edge of the reinforcing part (22) away from the connecting part (21) is arranged in a concave arc shape.

5. The solenoid valve mounting bracket (100) according to claim 1, characterized in that The width dimension of the connecting part (21) gradually increases in the direction away from the first support arm (1).

6. The solenoid valve mounting bracket (100) according to claim 1, characterized in that The number of the first connecting holes (1a) is three; one first connecting hole (1a) is arranged at the position close to the second support arm (2) of the first support arm (1), and the other two first connecting holes (1a) are arranged at the positions away from the second support arm (2) of the first support arm; the center lines of the three first connecting holes (1a) form an isosceles triangle.

7. The solenoid valve mounting bracket (100) according to claim 1, characterized in that The number of the second connecting holes (2a) is three; one second connecting hole (2a) is arranged at the middle position of the reinforcing part (22), and the other two second connecting holes (2a) are arranged at or close to the two wing parts (221) respectively.

8. The solenoid valve mounting bracket (100) according to claim 1, characterized in that The connecting part (21) and the reinforcing part (22) are integrally formed; the second support arm (2) is in a flat plate shape; And / or, the first support arm (1) is in a flat plate shape; And / or, the first support arm (1) and the second support arm (2) are integrally formed; And / or, the first support arm (1) and the second support arm (2) are arranged vertically.

9. A pneumatic control valve characterized by Comprise: The electromagnetic valve mounting frame (100) according to any one of claims 1 to 8; The pneumatic actuator (200) comprises a valve body (201) and an execution cylinder (202) connected to the valve body (201), the execution cylinder (202) comprises an upper cover shell (203) and a lower cover shell (204), the upper cover shell (203) and the lower cover shell (204) are detachably connected by a second fastener (3) and enclose a valve diaphragm chamber; the second support arm (2) is attached to the upper cover shell (203) on the side facing the first support arm (1) and is connected to the upper cover shell (203) by the second fastener (3); The solenoid valve (310) is connected to the first support arm (1) by a first fastener; the length direction of the solenoid valve (310) extends along the length direction of the first support arm (1).

10. A nuclear power plant main feedwater flow control system characterized by, It comprises: A main feedwater manifold (400); Steam generators (500), each of which is connected to the main feedwater manifold (400) by a connecting pipeline; A regulating valve assembly comprising a main regulating valve (600) and a bypass regulating valve (700), the main regulating valve (600) and the bypass regulating valve (700) are arranged in parallel in the connecting pipeline; wherein the main regulating valve (600) and the bypass regulating valve (700) both adopt the pneumatic regulating valve as claimed in claim 9.

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