Large-diameter multi-stage pilot-operated type high-pressure electromagnetic valve

Abstract

The utility model discloses a large-caliber multistage pilot-operated type high-pressure electromagnetic valve which comprises an electromagnetic valve shell and an electromagnet installed in the center of the interior of the electromagnetic valve shell, the top end and the bottom end of the electromagnetic valve shell are respectively provided with a liquid drainage cavity and a liquid inlet cavity which are symmetrical, and the extension lines of the central axes of the liquid drainage cavity and the liquid inlet cavity are parallel to each other. A transverse drainage cavity is formed in the portion, between the liquid discharging cavity and the liquid inlet cavity, of the valve shell of the electromagnetic valve, and a flow guide cavity parallel to the transverse drainage cavity is formed in the portion, on one side of the liquid inlet cavity, of the valve shell of the electromagnetic valve. The two valve rods are simultaneously controlled through the electromagnet in the center of the valve, complete synchronization of opening and closing operation of two pipelines is ensured, pipeline instability possibly caused by asynchronous operation is reduced in occasions needing high-precision control such as a hydraulic system or a pneumatic system, and reliability and control precision of a pipeline system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a large-diameter multi-stage pilot-operated high-pressure solenoid valve. Background Technique

[0002] The functions of the pilot-operated high-pressure solenoid valve include controlling the on-off, flow rate and pressure regulation of high-pressure fluid media, and are applicable to hydraulic systems, pneumatic systems and various fluid control occasions. Its structure consists of a valve body, a valve, an electromagnet, a valve seat and seals, etc. In particular, the introduction of the pilot valve makes it have significant advantages in control accuracy and stability. The working principle is based on the regulation of electromagnetic force. By controlling the current, the electromagnet generates a magnetic field, thereby driving the switching state changes of components such as the valve, valve core and spring. This design enables the pilot-operated high-pressure solenoid valve to reliably perform complex fluid control tasks in various industrial applications, ensuring the efficient operation and safety of the system. At present, during the use of the pilot-operated high-pressure solenoid valve, one electromagnet controls one solenoid valve core to act. In the case where it is necessary to control the opening and closing of two pipelines simultaneously, two sets of solenoid valves are required to work. In the case of highly precise control of the flow of fluid media, multiple electromagnets controlling multiple solenoid valve cores will affect the pipeline control accuracy and synchronization. Content of the Utility Model

[0003] The purpose of the utility model is to provide a large-diameter multi-stage pilot-operated high-pressure solenoid valve. An electromagnet is arranged at the central part of the solenoid valve housing, and valve rods and elastic reset structures are arranged on both sides inside the solenoid valve housing. After the electromagnet generates magnetic force, the two valve rods are attracted synchronously, so that the liquid inlet cavity, the diversion cavity, the transverse drainage cavity and the drainage cavity are in a conducting state, realizing the synchronous opening and closing control function of the double pipelines, so as to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: A large-diameter multi-stage pilot-operated high-pressure solenoid valve, including a solenoid valve housing and an electromagnet installed at the central position inside the solenoid valve housing. Two symmetric drainage cavities and liquid inlet cavities are respectively arranged at the top and bottom of the solenoid valve housing. The extension lines of the central axes of the drainage cavity and the liquid inlet cavity are parallel to each other. A transverse drainage cavity is arranged inside the solenoid valve housing between the drainage cavity and the liquid inlet cavity. A diversion cavity parallel to the transverse drainage cavity is arranged inside the solenoid valve housing on one side of the liquid inlet cavity. The liquid inlet cavity, the diversion cavity and the transverse drainage cavity are mutually conducting. A valve rod is slidably installed inside the liquid inlet cavity. Two annular sealing blocks II and annular sealing blocks I are integrally formed at both ends of the surface of the valve rod. The annular sealing block II is used to seal the drainage cavity, and the annular sealing block I is used to seal the liquid inlet cavity and the transverse drainage cavity when the valve rod is magnetically attracted. An elastic reset structure for forcing the valve rod to reset is installed on one side inside the solenoid valve housing.

[0005] Preferably, a double - diameter drain pipe for communicating with the drain cavity is installed at the top end of the solenoid valve housing, and a double - diameter inlet pipe for communicating with the inlet cavity is installed at the bottom end of the solenoid valve housing.

[0006] Preferably, outer sealing cylinders are fixed on the left and right outer walls of the solenoid valve housing. One end of the valve stem extends into the inner part of the outer sealing cylinder and is fixed with a retaining cap. A second spring is installed at one end of the retaining cap, and one end of the second spring is fixedly connected to one side outer wall of the solenoid valve housing.

[0007] Preferably, a gap part is arranged between the first annular sealing block and the second annular sealing block.

[0008] Preferably, the double - diameter drain pipe includes an external thread pipe thread - installed at the top end of the solenoid valve housing and two diversion pipes integrally formed at the top end of the external thread pipe.

[0009] Preferably, the valve stem is made of a stainless - steel component, and positioning holes are arranged on both sides of the surface of the solenoid valve housing.

[0010] Preferably, the elastic reset structure includes a T - shaped pin installed on one side inside the solenoid valve housing and a spiral spring installed at one end of the valve stem. One end of the spiral spring extends into the inside of the T - shaped pin.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The large - diameter multi - stage pilot - type high - pressure solenoid valve is provided with structures such as an electromagnet and an elastic reset structure that cooperate with each other. The solenoid valve controls two valve stems simultaneously through the electromagnet at its center, ensuring that the opening and closing operations of the two pipelines are completely synchronous. In occasions such as hydraulic systems or pneumatic systems that require high - precision control, it reduces the instability of the pipeline caused by asynchronous operation, improves the reliability and control precision of the pipeline system, and compared with using two sets of separate solenoid valves, it reduces the number of devices and the wiring length, and reduces the installation cost and usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the front - view structural schematic diagram of the present utility model;

[0013] Figure 2 is the front - view sectional structural schematic diagram of the present utility model;

[0014] Figure 3 is the three - dimensional structural schematic diagram of the present utility model;

[0015] Figure 4 is the three - dimensional sectional structural schematic diagram of the present utility model;

[0016] In the figure: 1. Solenoid valve housing; 101. Drainage cavity; 102. Liquid inlet cavity; 103. Horizontal drainage cavity; 2. Outer sealing cylinder; 3. Electromagnet; 4. Double-diameter drain pipe; 5. Double-diameter liquid inlet pipe; 6. Valve stem; 601. First annular sealing block; 602. Second annular sealing block; 603. Gap part; 7. Diversion cavity; 8. Positioning hole; 9. Elastic reset structure; 901. T-shaped pin; 902. Helical spring. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-4 , an embodiment provided by the present invention: a large-diameter multi-stage pilot-operated high-pressure solenoid valve, including a solenoid valve housing 1 and an electromagnet 3 installed at the center position inside the solenoid valve housing 1. Two symmetric drainage cavities 101 and liquid inlet cavities 102 are respectively arranged at the top and bottom ends of the solenoid valve housing 1. The extension lines of the central axes of the drainage cavity 101 and the liquid inlet cavity 102 are parallel to each other. A horizontal drainage cavity 103 is arranged inside the solenoid valve housing 1 between the drainage cavity 101 and the liquid inlet cavity 102. A diversion cavity 7 parallel to the horizontal drainage cavity 103 is arranged inside the solenoid valve housing 1 on one side of the liquid inlet cavity 102. The liquid inlet cavity 102, the diversion cavity 7, and the horizontal drainage cavity 103 are in communication with each other. A valve stem 6 is slidably installed inside the liquid inlet cavity 102. Two ends of the surface of the valve stem 6 are integrally formed with a second annular sealing block 602 and a first annular sealing block 601 respectively. A gap part 603 is arranged between the first annular sealing block 601 and the second annular sealing block 602;

[0019] The second annular sealing block 602 is used to block the drainage cavity 101. The first annular sealing block 601 is used to block the liquid inlet cavity 102 and the horizontal drainage cavity 103 when the valve stem 6 is magnetically attracted. An elastic reset structure 9 for forcing the valve stem 6 to reset is installed on one side inside the solenoid valve housing 1. When the solenoid valve housing 1 is in a closed state, under the action of the medium impact force, the elastic reset structure 9 can keep the valve stem 6 in a firm sealing state, so that the first annular sealing block 601 and the valve stem 6 are pilot-closed by using the flowing impact force of the medium to ensure the reliable operation of the valve;

[0020] A double-diameter drain pipe 4 for communicating with the drainage cavity 101 is installed at the top end of the solenoid valve housing 1. A double-diameter liquid inlet pipe 5 for communicating with the liquid inlet cavity 102 is installed at the bottom end of the solenoid valve housing 1. The fluid medium flows from the direction of the double-diameter liquid inlet pipe 5 towards the direction of the double-diameter drain pipe 4, thereby forming two medium flow pipelines;

[0021] Outer sealing cylinders 2 are fixed on the left and right outer walls of the solenoid valve housing 1. One end of the valve stem 6 extends into the interior of the outer sealing cylinder 2 and is fixed with a retaining cap. A second spring is installed at one end of the retaining cap, and one end of the second spring is fixedly connected to one side outer wall of the solenoid valve housing 1. The outer sealing cylinder 2 makes the two side outer walls of the solenoid valve housing 1 in a closed state, avoiding medium leakage caused by the valve stem 6 passing through the outside of the solenoid valve housing 1. The end of the valve stem 6 inside the outer sealing cylinder 2 is fixed with a retaining cap, and a second spring is installed on one side outer wall of the retaining cap. The reset speed of the valve stem 6 is further increased through the second spring and the retaining cap;

[0022] The double - diameter drain pipe 4 includes an external - thread pipe threadedly installed at the top of the solenoid valve housing 1 and two diversion pipes integrally formed at the top of the external - thread pipe. Each double - diameter drain pipe 4 and each double - diameter inlet pipe 5 allow the discharge or supply of the medium through two pipes with the same diameter simultaneously, so as to further increase the workload of the solenoid valve;

[0023] The valve stem 6 is made of a stainless - steel component. Positioning holes 8 are provided on both sides of the surface of the solenoid valve housing 1. The elastic reset structure 9 includes a T - shaped pin 901 installed on one side inside the solenoid valve housing 1 and a helical spring 902 installed at one end of the valve stem 6. One end of the helical spring 902 extends into the interior of the T - shaped pin 901. When the electromagnet 3 is powered off, the helical spring 902 starts to reset from the compressed state, and the helical spring 902 forces the T - shaped pin 901 and the valve stem 6 to move away from the electromagnet 3 until the annular sealing block two 602 and the valve stem 6 are pushed to the limit position.

[0024] When the embodiment of the present application is in use, first, the staff connect two double-orifice inlet pipes 5 and two double-orifice drain pipes 4 to the pipeline system respectively. During this process, the fluid medium flows from the direction of the double-orifice inlet pipe 5 towards the direction of the double-orifice drain pipe 4, thus forming two medium flow pipelines. When it is necessary to control the solenoid valve to be in the normally open state, the staff energize the electromagnet 3 to generate magnetic force. Then, the two valve stems 6 inside the solenoid valve housing 1 are simultaneously attracted by the magnetic force of the electromagnet 3. Further, the valve stem 6 moves towards the direction where the electromagnet 3 is located. At this time, the elastic reset structure 9 is in a compressed state. During this process, the valve stem 6 will drive the annular sealing block two 602 and the annular sealing block one 601 to slide together. Then, the annular sealing block two 602 no longer blocks and cuts off the drain cavity 101 and the lateral drainage cavity 103. And at this time, the annular sealing block one 601 moves above the inlet cavity 102 to prevent the medium in the inlet cavity 102 from directly entering the lateral drainage cavity 103. Further, the medium flows along the inlet cavity 102 and the diversion cavity 7 into the lateral drainage cavity 103 and is discharged through the double-orifice drain pipe 4. At this time, both of the two double-orifice drain pipes 4 are in the normally open state. When the electromagnet 3 is de-energized, the elastic force of the elastic reset structure 9 causes the valve stem 6 to quickly reset. Then, the annular sealing block two 602 blocks the drain cavity 101 and the lateral drainage cavity 103, so that the medium in the diversion cavity 7 can no longer pass through the lateral drainage cavity 103. And at this time, the medium in the inlet cavity 102 will directly enter the lateral drainage cavity 103 and exert an impact force on the side wall of the annular sealing block one 601 to help the valve stem 6 and the annular sealing block two 602 firmly cut off the drain cavity 101 and the lateral drainage cavity 103, so that the two pipelines in the whole valve body are in a closed state. This solenoid valve controls two valve stems 6 simultaneously through the electromagnet 3 at its center, ensuring that the opening and closing operations of the two pipelines are completely synchronized. In occasions such as hydraulic systems or pneumatic systems that require high-precision control, it reduces the pipeline instability that may be caused by asynchronous operation, improves the reliability and control accuracy of the pipeline system, and compared with using two sets of separate solenoid valves, it reduces the number of devices and the wiring length, and reduces the installation cost and the usage cost.

Claims

1. Large-caliber multi-stage pilot-operated high-pressure solenoid valve, characterized by: The invention comprises a solenoid valve housing (1) and an electromagnet (3) installed at the center position of the solenoid valve housing (1); the top and bottom ends of the solenoid valve housing (1) are respectively provided with two symmetrical liquid discharge cavities (101) and liquid inlet cavities (102); the extended lines of the central axes of the liquid discharge cavities (101) and the liquid inlet cavities (102) are parallel to each other; a transverse drainage cavity (103) is provided inside the solenoid valve housing (1) between the liquid discharge cavity (101) and the liquid inlet cavity (102); a guide cavity (7) parallel to the transverse drainage cavity (103) is provided inside the solenoid valve housing (1) on one side of the liquid inlet cavity (102); The liquid chamber (102), the guide chamber (7), and the transverse drainage chamber (103) are interconnected, and a valve stem (6) is slidably installed inside the liquid inlet chamber (102). The two ends of the surface of the valve stem (6) are respectively integrally formed with an annular sealing block 2 (602) and an annular sealing block 1 (601), the annular sealing block 2 (602) is used to seal the discharge chamber (101), and the annular sealing block 1 (601) is used to seal the liquid inlet chamber (102) and the transverse drainage chamber (103) when the valve stem (6) is magnetically attracted. An elastic reset structure (9) for forcing the valve stem (6) to reset is installed on one side of the solenoid valve housing (1).

2. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 1 is characterized in that: The top end of the solenoid valve housing (1) is provided with a double-caliber liquid discharge pipe (4) for communicating with the liquid discharge chamber (101), and the bottom end of the solenoid valve housing (1) is provided with a double-caliber liquid inlet pipe (5) for communicating with the liquid inlet chamber (102).

3. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 1 is characterized in that: An outer sealing cylinder (2) is fixed to both the left and right outer walls of the solenoid valve housing (1); one end of the valve stem (6) extends into the interior of the outer sealing cylinder (2) and is fixed with a stop cap; a second spring is mounted on one end of the stop cap; one end of the second spring is fixedly connected to one side outer wall of the solenoid valve housing (1).

4. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 1 is characterized in that: A gap portion (603) is provided between the annular sealing block 1 (601) and the annular sealing block 2 (602).

5. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 2 is characterized in that: The double-caliber liquid discharge pipe (4) comprises an externally threaded pipe threadedly mounted on the top of the solenoid valve housing (1) and two flow guide pipes integrally formed at the top of the externally threaded pipe.

6. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 1 is characterized in that: The valve stem (6) is made of a stainless steel component, and positioning holes (8) are provided on both sides of the surface of the solenoid valve housing (1).

7. The large-caliber multi-stage pilot-operated high-pressure solenoid valve according to claim 1 is characterized in that: The elastic reset structure (9) comprises a T-shaped pin (901) mounted on one side of the interior of the solenoid valve housing (1), and a coil spring (902) mounted on one end of the valve stem (6), one end of the coil spring (902) extending into the interior of the T-shaped pin (901).

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