Large-diameter electromagnetic valve with adjustable flow

Abstract

The utility model provides a flow-adjustable large-caliber electromagnetic valve, which comprises a valve body component, a diaphragm component, an inlet proportioning valve and an outlet proportioning valve, an inlet cavity is arranged on one side of the valve body component, an outlet cavity is arranged on the other side of the valve body component, and the inlet cavity and the outlet cavity can be communicated through a valve port; the diaphragm assembly is movably installed at the valve port and used for opening and closing the valve port. A pressure adjusting cavity is formed in the upper side of the diaphragm assembly, the inlet cavity communicates with the pressure adjusting cavity through an inlet channel, and the pressure adjusting cavity communicates with the outlet cavity through an outlet channel. The inlet proportioning valve and the outlet proportioning valve are correspondingly installed at the inlet channel and the outlet channel respectively and used for adjusting the pressure of the pressure adjusting cavity in a matched mode, so that the pressure difference exists between the pressure adjusting cavity and the inlet cavity, and then the opening degree of the diaphragm assembly is adjusted. The large-diameter electromagnetic valve with the adjustable flow overcomes the defect that an existing electromagnetic valve is not suitable for large-diameter flow adjustment.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a large-caliber electromagnetic valve with adjustable flow rate. Background Art

[0002] The solenoid valve is an actuator in the automatic control system, which has the function of controlling the opening and closing of the fluid and changing the direction of the fluid. The existing solenoid valve technology has always believed that the solenoid valve can only execute two states, either fully open or fully closed. The proportional control valve developed later is also limited to the application on small-diameter direct-acting solenoid valves, and it is still helpless for the flow regulation of large-diameter solenoid valves. Of course, there are also international giant companies that have developed large-diameter solenoid valves with adjustable flow, but if you purchase from them, not only are the prices expensive, the delivery time is long, and you may not be able to buy the goods, facing the risk of "stuck neck", which is very unfavorable to the development of China's automation. For this reason, the utility model has developed a large-diameter solenoid valve with adjustable flow to address the above problems, which fills the gap in this area very well. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The problem to be solved by the utility model is to provide a large-caliber solenoid valve with adjustable flow rate, so as to overcome the defect that the existing solenoid valve is not suitable for large-caliber flow rate regulation.

[0005] (II) Technical solution

[0006] In order to solve the technical problem, the utility model provides a large-caliber solenoid valve with adjustable flow, comprising:

[0007] A valve body assembly, one side of which is provided with an inlet cavity, and the other side of which is provided with an outlet cavity, wherein the inlet cavity and the outlet cavity are connected through a valve port;

[0008] A diaphragm assembly is movably mounted at the valve port and is used to open and close the valve port; a pressure regulating chamber is formed on the upper side of the diaphragm assembly, the inlet chamber is connected to the pressure regulating chamber through an inlet channel, and the pressure regulating chamber is connected to the outlet chamber through an outlet channel;

[0009] The inlet proportional regulating valve and the outlet proportional regulating valve are respectively installed at the inlet channel and the outlet channel, and are used to cooperate in regulating the pressure of the pressure regulating chamber so that a pressure difference occurs between the pressure regulating chamber and the inlet chamber, thereby adjusting the opening of the diaphragm assembly.

[0010] In some embodiments, a balance rod is threadedly connected to the bottom of the inlet cavity, the balance rod is vertically arranged and is on the same axis as the diaphragm assembly, and the upper end of the balance rod passes through the diaphragm assembly to guide the diaphragm assembly.

[0011] In some embodiments, a manual adjustment assembly is installed on the valve body assembly, an adjustment spring is installed between the manual adjustment assembly and the diaphragm assembly, and the adjustment spring is placed in the pressure regulating chamber; the adjustment spring always makes the diaphragm assembly tend to move toward the valve port, and the manual adjustment assembly is used to adjust the spring force of the adjustment spring.

[0012] In some embodiments, the inlet proportional regulating valve and the outlet proportional regulating valve have the same structure, both comprising a magnetic isolation tube and a movable iron core movably mounted in the magnetic isolation tube, a conical seal installed at the lower end of the movable iron core, and the conical seal extends into the inlet channel / the outlet channel; a conical attraction concave surface is provided in the magnetic isolation tube, and a conical attraction convex surface matching the conical attraction concave surface is provided at one end of the movable iron core. An adjusting screw is threadedly connected to the top end of the magnetic isolation tube, and an iron core spring is installed between the adjusting screw and the movable iron core, and the adjusting screw is used to adjust the spring force of the iron core spring; a high wear-resistant coating is sprayed on the outer surface of the movable iron core and the inner wall of the magnetic isolation tube, and an electromagnetic coil is installed on the outer side of the magnetic isolation tube.

[0013] In some embodiments, the diaphragm assembly includes a diaphragm tray, a diaphragm and a diaphragm pressure plate installed in sequence from bottom to top, and the diaphragm is provided with an annular arc protrusion, and the outer edge of the arc protrusion is fixed to the valve body assembly, so that the inlet cavity is separated from the pressure regulating cavity. A threaded connecting rod is provided at the center of the diaphragm pressure plate, and a center guide hole is provided in the threaded connecting rod, and a sealing assembly is installed in the center guide hole; a pressure block is threadedly connected to the threaded connecting rod, and the pressure block is used to limit the sealing assembly; the sealing assembly includes a sealing ring located on the inside and an O-ring sleeved on the outside of the sealing ring. One end of the threaded connecting rod passes through the diaphragm and the diaphragm tray and is threadedly connected to a fastening nut, and an anti-loosening gasket is installed between the fastening nut and the diaphragm tray, and the anti-loosening gasket is sleeved on the threaded connecting rod.

[0014] In some embodiments, the manual adjustment assembly includes a fixed seat fixed at the upper end of the valve body assembly and an adjustment knob threadedly connected to the fixed seat, the lower end of the adjustment knob extends into the pressure regulating chamber, and one end of the adjustment spring abuts against the extending end of the adjustment knob; a plurality of sealing rings are installed on the outer wall of the adjustment knob at axial intervals.

[0015] In some embodiments, the valve body assembly includes a valve body and a valve cover fixed on the upper side of the valve body, the inlet chamber, the outlet chamber and the valve port are located in the valve body; the pressure regulating chamber is located in the valve cover, and the inlet proportional regulating valve and the outlet proportional regulating valve are respectively threadedly connected on both sides of the valve cover; an inlet sealing ring and an outlet sealing ring are installed between the valve body and the valve cover, and the inlet sealing ring and the outlet sealing ring are correspondingly installed at the inlet channel and the outlet channel.

[0016] (III) Beneficial effects

[0017] The utility model provides a large-caliber solenoid valve with adjustable flow, which has the following advantages compared with the prior art:

[0018] 1) Suitable for large-caliber fluid medium switch and flow control. Two PWMs control the inlet and outlet electromagnetic proportional control valves respectively. By adjusting the opening size of the moving parts in the proportional control valve, a pressure difference is formed between the electromagnetic valve pressure regulating chamber and the inlet chamber. The different pressure differences are used to control the opening degree of the diaphragm assembly, so as to adjust the flow size of the fluid. The electromagnetic proportional control valve is cleverly applied to the large-caliber solenoid valve. Through the cooperation of the PWM controller, the adjustment function is perfectly realized, the purpose of flow regulation is achieved, and the application scenarios of the solenoid valve are broadened. It breaks through the defect that the conventional solenoid valve can only control the switch of the fluid but cannot adjust the flow size. Especially in the application of large-caliber solenoid valves, it makes up for the original defects well, meets the needs of more occasions, and further improves the application of solenoid valves.

[0019] 2) The suction surfaces of the two electromagnetic proportional control valves are designed to be conical, so that the electromagnetic coil can generate greater electromagnetic force under the same power; the active parts and inner cavity of the electromagnetic proportional control valve are sprayed with high wear-resistant coating, making the surface very smooth and wear-resistant, which not only improves the adjustment accuracy but also greatly increases the service life; the seals of the active parts in the electromagnetic proportional control valve are designed to be conical, which improves the sealing effect and widens the adjustment range of the moving parts, making the adjustment more delicate; the adjusting screw at the upper end of the electromagnetic proportional control valve can be rotated to adjust the size of the spring pressure, which can be adjusted according to different medium pressures to meet the needs of various working conditions;

[0020] 3) The manual adjustment component can adjust the force of the adjustment spring on the diaphragm component. The component can achieve fine-tuning of the flow rate under different media and different media pressures to meet the accuracy requirements of flow control; the balance bar at the lower end of the diaphragm component makes the diaphragm movement more stable, minimizes the eddy effect generated by the fluid, makes the fluid movement more stable, and ensures accuracy;

[0021] 4) The diaphragm of the diaphragm assembly adopts an arc-shaped design. While increasing the flow rate, the opening and closing valves will not pull the diaphragm like a flat diaphragm, which can greatly increase the service life of the diaphragm. A sealing assembly is set in the middle of the diaphragm assembly. The design contains a PTFE sealing ring inside and an O-ring on the outside. The biggest feature of this design is that the PTFE surface is very smooth and has a low friction coefficient, which is suitable for sliding sealing. However, long-term work will cause leakage due to friction loss, and the O-ring on the outside can provide compensation force, so that the PTFE sealing ring can always be in a sealed state, so that no leakage occurs, the sealing is good, and the flow regulation is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of a large-caliber solenoid valve with adjustable flow rate according to the utility model;

[0024] Figure 2 This is a schematic structural diagram of a large-caliber solenoid valve body with adjustable flow, a balance rod and a diaphragm assembly connected in the utility model;

[0025] Figure 3 This is a structural schematic diagram of a large-caliber solenoid valve inlet proportional regulating valve with adjustable flow rate according to the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of a large-caliber solenoid valve diaphragm assembly with adjustable flow rate according to the utility model;

[0027] Figure 5 This is a schematic structural diagram of a large-caliber solenoid valve with adjustable flow rate connected to a valve cover by a manual adjustment component of the utility model;

[0028] Figure 6 It is a structural schematic diagram of a large-caliber solenoid valve with adjustable flow rate in a partially open state of the utility model;

[0029] Figure 7 This is a structural schematic diagram of a large-caliber solenoid valve with adjustable flow rate in a fully open state according to the utility model;

[0030] The names of the components corresponding to the reference numerals in the figure are: 1. valve body assembly; 11. valve body; 12. valve cover; 101. inlet cavity; 102. outlet cavity; 103. valve port; 104. pressure regulating cavity; 105. inlet channel; 106. outlet channel; 2. diaphragm assembly; 21. diaphragm tray; 22. diaphragm; 23. diaphragm pressure plate; 24. sealing assembly; 25. pressure block; 26. fastening nut; 27. anti-loosening gasket; 221. arc convex part; 231. threaded connection Connecting rod; 232, center guide hole; 241, sealing ring; 242, O-ring; 3, inlet proportional control valve; 31, magnetic isolation tube; 32, movable iron core; 33, conical seal; 34, adjusting screw; 35, iron core spring; 36, electromagnetic coil; 311, conical suction concave surface; 321, conical suction convex surface; 4, outlet proportional control valve; 5, balance rod; 6, manual adjustment assembly; 61, fixing seat; 62, adjusting knob; 63, sealing ring; 7, adjusting spring. DETAILED DESCRIPTION

[0031] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0033] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0036] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0037] See also Figures 1 to 7 The utility model provides a large-caliber solenoid valve with adjustable flow rate, comprising a valve body assembly 1, a diaphragm assembly 2, an inlet proportional regulating valve 3 and an outlet proportional regulating valve 4.

[0038] See also Figure 1 and Figure 2 , an inlet chamber 101 is provided on one side of the valve body assembly 1, and an outlet chamber 102 is provided on the other side, and the inlet chamber 101 and the outlet chamber 102 can be connected through the valve port 103. Among them, the inlet chamber 101 and the outlet chamber 102 are located on the same axis, and the axis of the valve port 103 is perpendicular to the axis of the inlet chamber 101. The diaphragm assembly 2 is movably installed at the valve port 103, and is used to open and close the valve port 103; a pressure regulating chamber 104 is formed on the upper side of the diaphragm assembly 2, and the pressure regulating chamber 104 is surrounded by the diaphragm assembly 2 and the valve cover 12 of the valve body assembly 1. The inlet chamber 101 is connected to the pressure regulating chamber 104 through the inlet channel 105, and the pressure regulating chamber 104 is connected to the outlet chamber 102 through the outlet channel 106. The inlet channel 105 and the outlet channel 106 are respectively arranged on both sides of the valve body assembly 1. The inlet proportional regulating valve 3 and the outlet proportional regulating valve 4 are respectively installed at the inlet channel 105 and the outlet channel 106, and are used to coordinately adjust the pressure of the pressure regulating chamber 104, so that a pressure difference occurs between the pressure regulating chamber 104 and the inlet chamber 101, thereby adjusting the opening of the diaphragm assembly 2. The inlet proportional regulating valve 3 and the outlet proportional regulating valve 4 are both electromagnetic proportional regulating valves, and the two proportional regulating valves are respectively connected to two PWM controllers.

[0039] This solenoid valve is suitable for large-caliber fluid medium switching and flow control. Two PWMs control the inlet and outlet electromagnetic proportional control valves respectively. The opening size of the moving parts in the proportional control valve is used to form a pressure difference between the solenoid valve pressure regulating chamber and the inlet chamber. The different pressure differences are used to control the opening degree of the diaphragm assembly, so as to adjust the flow size of the fluid. The electromagnetic proportional control valve is cleverly applied to large-caliber solenoid valves. Through the cooperation of the PWM controller, the adjustment function is perfectly realized, the purpose of flow regulation is achieved, and the application scenarios of the solenoid valve are broadened. It breaks through the defect that conventional solenoid valves can only control the switch of the fluid but cannot adjust the flow size. Especially in the application of large-caliber solenoid valves, it makes up for the original defects well, meets the needs of more occasions, and further improves the application of solenoid valves.

[0040] In some embodiments, Figure 1 and Figure 2 As shown, the bottom of the inlet cavity 101 is threadedly connected with a balance bar 5, which is arranged vertically and is on the same axis as the diaphragm assembly 2. The upper end of the balance bar 5 penetrates the diaphragm assembly 2 for guiding the diaphragm assembly 2, and the diaphragm assembly 2 is provided with a central guide hole 232 adapted to the balance bar 5. In this structure, the balance bar 5 is installed at the lower end of the diaphragm assembly, and the balance bar 5 can keep the diaphragm on the same axis when it moves up and down, which can significantly reduce or even eliminate the shaking effect of the vortex generated by the fluid on the movement of the diaphragm, making the flow of the fluid more stable.

[0041] In some embodiments, Figure 1 and Figure 5 As shown, a manual adjustment component 6 is installed on the valve body assembly 1, and an adjustment spring 7 is installed between the manual adjustment component 6 and the diaphragm assembly 2, and the adjustment spring 7 is placed in the pressure regulating chamber 104; the adjustment spring 7 always makes the diaphragm assembly 2 tend to move toward the valve port 103, and the manual adjustment component 6 is used to adjust the spring force of the adjustment spring 7.

[0042] The manual adjustment component 6 includes a fixed seat 61 fixed to the upper end of the valve body component 1 and an adjustment knob 62 threadedly connected to the fixed seat 61. The lower end of the adjustment knob 62 extends into the pressure regulating chamber 104, and one end of the adjustment spring 7 is placed against the extending end of the adjustment knob 62. A plurality of sealing rings 63 are installed at intervals along the axial direction on the outer wall of the adjustment knob 62 to ensure sealing. With this structure, the manual adjustment component can adjust the force of the adjustment spring on the diaphragm component. The component can achieve fine adjustment of the flow rate under different media and different media pressures to meet the accuracy requirements of flow control.

[0043] In some embodiments, Figure 1 and Figure 3As shown, the inlet proportional regulating valve 3 and the outlet proportional regulating valve 4 have the same structure, both of which include a magnetic isolation tube 31 and a movable iron core 32 movably installed in the magnetic isolation tube 31, and a conical seal 33 is installed at the lower end of the movable iron core 32, and the conical seal 33 extends into the inlet channel 105 / outlet channel 106. A conical suction concave surface 311 is provided in the magnetic isolation tube 31, and a conical suction convex surface 321 adapted to the conical suction concave surface 311 is provided at one end of the movable iron core 32. An adjusting screw 34 is threadedly connected to the top of the magnetic isolation tube 31, and an iron core spring 35 is installed between the adjusting screw 34 and the movable iron core 32. A through hole for the iron core spring 35 to pass through is provided on the magnetic isolation tube 31, and the adjusting screw 34 is used to adjust the spring force of the iron core spring 35. The outer surface of the movable iron core 32 and the inner wall of the magnetic isolation tube 31 are sprayed with a high wear-resistant coating, and an electromagnetic coil 36 is installed on the outer side of the magnetic isolation tube 31.

[0044] The suction surfaces of the two electromagnetic proportional control valves are designed to be conical, so that the electromagnetic coil can generate greater electromagnetic force under the same power; the moving parts and inner cavity of the electromagnetic proportional control valve are sprayed with high wear-resistant coating, making the surface very smooth and wear-resistant, which not only improves the adjustment accuracy but also greatly increases the service life; the seals of the moving parts in the electromagnetic proportional control valve are designed to be conical, which improves the sealing effect while also widening the adjustment range of the moving parts, making the adjustment more delicate; the adjusting screw at the upper end of the electromagnetic proportional control valve can be rotated to adjust the size of the spring pressure, which can be adjusted according to different medium pressures to meet the needs of various working conditions.

[0045] In some embodiments, Figure 1 , Figure 2 and Figure 4 As shown, the diaphragm assembly 2 includes a diaphragm tray 21, a diaphragm 22 and a diaphragm pressing plate 23 which are sequentially installed from bottom to top. The diaphragm 22 is provided with an annular arc convex portion 221, and the outer edge of the arc convex portion 221 is fixed to the valve body assembly 1, so that the inlet cavity 101 is separated from the pressure regulating cavity 104. A threaded connecting rod 231 is provided at the center of the diaphragm pressing plate 23, and a central guide hole 232 is provided in the threaded connecting rod 231, and a sealing assembly 24 is installed in the central guide hole 232; a pressing block 25 is threadedly connected to the threaded connecting rod 231, and the pressing block 25 is used to limit the sealing assembly 24; the sealing assembly 24 includes a sealing ring 241 located on the inside and an O-ring 242 sleeved on the outside of the sealing ring 241. One end of the threaded connecting rod 231 passes through the diaphragm 22 and the diaphragm tray 21 and is threadedly connected to the fastening nut 26, so that the diaphragm tray 21, the diaphragm 22 and the diaphragm pressure plate 23 are abutted and locked. An anti-loosening gasket 27 is installed between the fastening nut 26 and the diaphragm tray 21, and the anti-loosening gasket 27 is mounted on the threaded connecting rod 231.

[0046] In this structure, the diaphragm of the diaphragm assembly adopts an arc-shaped design. While increasing the flow rate, the opening and closing valves will not pull the diaphragm like a flat diaphragm, which can greatly increase the service life of the diaphragm. A sealing assembly is arranged in the middle of the diaphragm assembly. The design contains a PTFE (polytetrafluoroethylene) sealing ring inside and an O-ring on the outside. The biggest feature of this design is that the PTFE surface is very smooth and has a low friction coefficient, which is suitable for sliding sealing. However, long-term operation will cause leakage due to friction loss, and the O-ring on the outside can provide compensation force, so that the PTFE sealing ring can always be in a sealed state, so that no leakage occurs, the sealing is good, and the flow regulation is accurate.

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the valve body assembly 1 includes a valve body 11 and a valve cover 12 fixed on the upper side of the valve body 11, the inlet cavity 101, the outlet cavity 102 and the valve port 103 are located in the valve body 11; the pressure regulating cavity 104 is located in the valve cover 12, and the inlet proportional regulating valve 3 and the outlet proportional regulating valve 4 are respectively threadedly connected on both sides of the valve cover 12; an inlet sealing ring 13 and an outlet sealing ring 14 are installed between the valve body 11 and the valve cover 12, and the inlet sealing ring 13 and the outlet sealing ring 14 are correspondingly installed at the inlet channel 105 and the outlet channel 106 to ensure sealing.

[0048] The use process of this solenoid valve is as follows:

[0049] When the fluid enters the inlet chamber 101, there is no fluid in the pressure regulating chamber 104, and only the force of the adjusting spring 7 is applied to the diaphragm assembly 2. The pressure of the fluid in the inlet chamber 101 is greater than the force of the adjusting spring 7, so that the diaphragm assembly 2 moves upward, and the fluid directly passes through the valve port 103 to the outlet chamber 102. At this time, the solenoid valve is in an open state.

[0050] A PWM controller is used to adjust the inlet proportional regulating valve 3 so that the movable parts inside it move upward slowly, and the fluid can enter the pressure regulating chamber 104 through the inlet channel 105. Since the fluid contact area of ​​the pressure regulating chamber 104 is larger than the fluid contact area of ​​the inlet chamber 101, the pressure of the pressure regulating chamber 104 is greater than the pressure of the inlet chamber 101, so that the diaphragm assembly 2 moves downward and closes the valve port 103. Figure 1 shown.

[0051] Another PWM controller is used to adjust the outlet proportional regulating valve 4, so that the movable parts inside it also move upward slowly, and the fluid in the pressure regulating chamber 104 is discharged to the outlet chamber 102 through the outlet channel 106; the PWM controller is continued to be used to adjust the outlet proportional regulating valve 4, and the opening length of the movable parts is increased. When the outflow of the fluid in the pressure regulating chamber 104 is greater than the inflow, the pressure of the pressure regulating chamber 104 begins to decrease. When the pressure of the pressure regulating chamber 104 is less than the pressure of the inlet chamber 101, the diaphragm assembly 2 begins to move upward, and the valve is partially opened, such as Figure 6As shown in the figure, if the opening length of the movable parts in the outlet proportional control valve 4 is further increased, the diaphragm assembly 2 will reach the highest position, and the solenoid valve will reach the maximum opening state, as shown in the figure. Figure 7 The movement amplitude of the diaphragm assembly 2 will change with the opening length of the movable part in the outlet proportional control valve 4, and the fluid flow rate will also change accordingly, thereby realizing the flow rate regulation.

[0052] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A large-caliber solenoid valve with adjustable flow, characterized in that: include: A valve body assembly (1) having an inlet chamber (101) on one side and an outlet chamber (102) on the other side, wherein the inlet chamber (101) and the outlet chamber (102) are connected via a valve port (103); A diaphragm assembly (2) is movably mounted at the valve port (103) and is used to open and close the valve port (103); a pressure regulating chamber (104) is formed on the upper side of the diaphragm assembly (2); the inlet chamber (101) is connected to the pressure regulating chamber (104) via an inlet channel (105); and the pressure regulating chamber (104) is connected to the outlet chamber (102) via an outlet channel (106); An inlet proportional regulating valve (3) and an outlet proportional regulating valve (4) are respectively installed at the inlet channel (105) and the outlet channel (106) and are used to coordinately regulate the pressure of the pressure regulating chamber (104) so ​​that a pressure difference occurs between the pressure regulating chamber (104) and the inlet chamber (101), thereby regulating the opening of the diaphragm assembly (2); The bottom of the inlet chamber (101) is threadedly connected to a balance rod (5), and the upper end of the balance rod (5) passes through the diaphragm assembly (2) to guide the diaphragm assembly (2).

2. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 1, characterized in that: The balance rod (5) is arranged vertically and is on the same axis as the diaphragm assembly (2); a manual adjustment assembly (6) is installed on the valve body assembly (1), and an adjustment spring (7) is installed between the manual adjustment assembly (6) and the diaphragm assembly (2), and the adjustment spring (7) is placed in the pressure regulating chamber (104); the adjustment spring (7) always makes the diaphragm assembly (2) tend to move toward the valve port (103), and the manual adjustment assembly (6) is used to adjust the spring force of the adjustment spring (7).

3. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 1, characterized in that: The inlet proportional regulating valve (3) and the outlet proportional regulating valve (4) have the same structure, both comprising a magnetic isolation tube (31) and a movable iron core (32) movably mounted in the magnetic isolation tube (31), a conical sealing member (33) being mounted at the lower end of the movable iron core (32), and the conical sealing member (33) extending into the inlet channel (105) / the outlet channel (106); a conical suction concave surface (311) is arranged in the magnetic isolation tube (31), and a conical suction convex surface (321) matching the conical suction concave surface (311) is arranged at one end of the movable iron core (32).

4. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 3, characterized in that: The top end of the magnetic isolation tube (31) is threadedly connected with an adjusting screw (34), and an iron core spring (35) is installed between the adjusting screw (34) and the movable iron core (32), and the adjusting screw (34) is used to adjust the spring force of the iron core spring (35); the outer surface of the movable iron core (32) and the inner wall of the magnetic isolation tube (31) are sprayed with a high wear-resistant coating, and an electromagnetic coil (36) is installed on the outer side of the magnetic isolation tube (31).

5. The flow-adjustable large-caliber solenoid valve according to claim 1, characterized in that: The diaphragm assembly (2) comprises a diaphragm tray (21), a diaphragm (22) and a diaphragm pressure plate (23) which are installed in sequence from bottom to top, and the diaphragm (22) is provided with an annular arc protrusion (221), and the outer edge of the arc protrusion (221) is fixed to the valve body assembly (1), so that the inlet chamber (101) is separated from the pressure regulating chamber (104).

6. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 5, characterized in that: A threaded connecting rod (231) is arranged at the center of the diaphragm pressure plate (23), a center guide hole (232) is arranged in the threaded connecting rod (231), and a sealing assembly (24) is installed in the center guide hole (232); a pressure block (25) is threadedly connected to the threaded connecting rod (231), and the pressure block (25) is used to limit the sealing assembly (24); the sealing assembly (24) includes a sealing ring (241) located on the inner side and an O-ring (242) sleeved on the outer side of the sealing ring (241).

7. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 6, characterized in that: One end of the threaded connecting rod (231) passes through the diaphragm (22) and the diaphragm tray (21) and is threadedly connected to the fastening nut (26). An anti-loosening gasket (27) is installed between the fastening nut (26) and the diaphragm tray (21), and the anti-loosening gasket (27) is mounted on the threaded connecting rod (231).

8. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 2, characterized in that: The manual adjustment assembly (6) comprises a fixing seat (61) fixed to the upper end of the valve body assembly (1) and an adjustment knob (62) threadedly connected to the fixing seat (61); the lower end of the adjustment knob (62) extends into the pressure regulating chamber (104); one end of the adjustment spring (7) abuts against the extending end of the adjustment knob (62); and a plurality of sealing rings (63) are installed on the outer wall of the adjustment knob (62) at intervals along the axial direction.

9. The large-caliber solenoid valve with adjustable flow rate as claimed in claim 1, characterized in that: The valve body assembly (1) comprises a valve body (11) and a valve cover (12) fixed on the upper side of the valve body (11); the inlet chamber (101), the outlet chamber (102) and the valve port (103) are located in the valve body (11); the pressure regulating chamber (104) is located in the valve cover (12); the inlet proportional regulating valve (3) and the outlet proportional regulating valve (4) are respectively threadedly connected to the two sides of the valve cover (12); an inlet sealing ring (13) and an outlet sealing ring (14) are installed between the valve body (11) and the valve cover (12); the inlet sealing ring (13) and the outlet sealing ring (14) are correspondingly installed at the inlet channel (105) and the outlet channel (106).

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