CN205278527U - Piston mechanism guide formula solenoid valve - Google Patents

Abstract

A pilot-operated solenoid valve with a piston mechanism. The two sides of the valve body are designed with a tapered thread connection outlet and a tapered thread connection inlet. The central part of the valve body is provided with an inner cavity structure, and a piston is installed in the inner cavity. The side of the piston The piston ring is installed in a coordinated position, and the piston ring is sealed with the inner cavity; the bottom of the piston is inlaid with a gasket, and the gasket is sealed with the fluid entering the valve cavity. The cavity is connected with the fluid inlet, and then the guide is sealed through the screw plug; a spring is installed on the top of the piston, and the spring is in contact with the upper surface of the cavity, and a pilot hole is opened at the center of the contact with the upper surface of the spring, and the sealing plug and the pilot hole Fitting connection: the upper part of the spool fits with the shaft hole of the bonnet, the bonnet is fixed and sealed by the fastening bolts on both sides, the top of the bonnet is fixedly connected to the electromagnetic device by the fastening bolts, and the iron core inside the electromagnetic device is connected to the spool .

Description

Piston Mechanism Pilot Solenoid Valve

technical field

The utility model relates to the field of solenoid valves, in particular to a pilot solenoid valve with a piston mechanism.

Background technique

The existing solenoid valve cannot be effectively optimized in terms of overall structure, and cannot be used in conjunction with the corresponding use according to the actual use. The inlet and outlet connections are all in the form of flange connection or threaded connection, which cannot be used in quick installation or disassembly. Go fast. Generally, the guiding path set up on the entire valve body is prone to clogging during use, which affects the use and causes certain troubles to the cleaning fluid. The existing solenoid valve still has a series of other problems to be optimized, such as the internal structure is complex, the composition The high cost of parts and components.

Utility model content

The utility model device is a pilot solenoid valve of a piston mechanism, which indirectly controls the cooperation of the pilot hole and the pilot mechanism through the electromagnetic device, so that the pressure difference between the upper and lower inner chambers of the piston is generated to move the piston, and the electromagnetic valve is realized by the movement of the piston structural parts. Valve opening and closing.

The technical solution adopted by the utility model is: a piston mechanism pilot solenoid valve, including: electromagnetic device, iron core, valve core, valve cover, screw plug, guide, taper thread connection outlet, piston ring, piston, sealing gasket , spring, valve body, tapered thread connection inlet, pilot hole, sealing plug and cable gland,

The two sides of the valve body are designed with a tapered thread connection outlet and a tapered thread connection inlet. The central part of the valve body is provided with an inner cavity structure, and a piston is installed in the inner cavity, and a piston ring is installed on the side of the piston. Sealed with the inner cavity;

The bottom of the piston is inlaid with a gasket, and the gasket cooperates with the opening where the fluid enters the valve chamber to seal. A guide is provided on the right side of the valve body, through which the upper chamber of the piston is connected with the fluid inlet, and then the guide is connected through the screw plug. the road is sealed;

A spring is installed on the top of the piston, the spring is in contact with the upper surface of the cavity, and a pilot hole is opened at the center of the contact with the upper surface of the spring, and the sealing plug is connected with the pilot hole, and the sealing plug and the valve core are inlaid Type connection, between the two is an insert structure;

The upper part of the spool is matched with the shaft hole of the bonnet, the bonnet is fixed and sealed through the fastening bolts on both sides, the top of the bonnet is fixedly connected to the electromagnetic device through the fastening bolts, and the iron core inside the electromagnetic device is connected to the spool , fixed by connecting screws; the side of the electromagnetic device is designed with cable joints, and the top of the electromagnetic device is fastened by fastening screws.

As a preferred solution, the small inner cavity on the upper part of the sealing plug is connected with the outlet channel of the valve body through a guide.

Beneficial effects of the utility model: 1. The product designed by the utility model has a series of usability improvements on the basis of the original traditional solenoid valve, reduces costs, reduces structural components, and makes the overall structure simpler. 2. In the product designed by the utility model, the pilot hole in the center of the valve core is well aligned, and the sealing performance is safe and reliable when the valve is closed. 3. In the product designed by the utility model, the screw plug sealing design of the guiding path can facilitate cleaning of the guiding path. 4. In the product designed by the utility model, the valve core adopts the combination form of inserts, which can strengthen the overall sealing performance and reduce the manufacturing cost of the components. 5. The product designed by this utility model only needs to replace the external piston ring, and the external piston ring adopts the form of sealing and sliding of the piston ring to avoid the direct sliding of the piston with the inner cavity, and the economic cost of replacing the entire piston due to direct friction. 6. The product designed by this utility model is designed as a taper thread connection at the fluid inlet and outlet positions at both ends of the valve body. The characteristic of this connection method is that it has the characteristics of quick loading and unloading, which can reduce the installation time, thereby improving the installation and maintenance. Efficiency of the disassembled solenoid valve.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model product.

Fig. 2 is a structural schematic diagram of components of the utility model product.

detailed description

This embodiment will be further described according to FIG. 1 and FIG. 2 .

A pilot solenoid valve with a piston mechanism, comprising: an electromagnetic device 1, an iron core 3, a valve core 4, a valve cover 5, a screw plug 6, a guide 7, a tapered thread connection outlet 8, a piston ring 9, a piston 10, and a gasket 11. Spring 12, valve body 13, tapered thread connection inlet 14, pilot hole 15, sealing plug 16 and cable joint 20,

The two sides of the valve body 13 are designed with a taper thread connection outlet 8 and a taper thread connection inlet 14. The central part of the valve body 13 is provided with an inner cavity structure, and a piston 10 is installed in the inner cavity, and the side position of the piston 10 is matched with the installation. There is a piston ring 9, and the piston ring 9 is tightly matched with the inner cavity;

The bottom of the piston 10 is inlaid with a gasket 11, and the gasket 11 cooperates with the fluid entering the valve cavity to seal, and the right side of the valve body 13 is provided with a guide 7, through which the upper chamber of the piston 10 communicates with the fluid inlet. , and then seal the guide path 7 through the screw plug 6;

The top of the piston 10 is equipped with a spring 12, the spring 12 is in contact with the upper surface in the cavity, and a pilot hole 15 is opened at the center of the contact with the upper surface of the spring 12, and the sealing plug 16 is connected with the pilot hole 15. The sealing plug 16 is connected with the valve core 4 in a mosaic type, and there is an insert structure between the two;

The upper part of the spool 4 is matched with the shaft hole of the bonnet 5, and the bonnet 5 is fixedly and hermetically connected by fastening bolts 17 on both sides, and the top of the bonnet 5 is fixedly connected to the electromagnetic device 1 by fastening bolts 18, and the electromagnetic device 1 The inner iron core 3 is connected with the valve core 4 and fixed by connecting screws 19; a cable joint 20 is designed on the side of the electromagnetic device, and the top of the electromagnetic device 1 is fastened by fastening screws 2.

Embodiment 2: The difference between this embodiment and Embodiment 1 is that: the small inner chamber on the upper part of the sealing plug 16 is connected with the outlet channel of the valve body 13 through the guide path 7 .

The product designed by the utility model has made a series of use improvements on the basis of the original solenoid valve, and can be widely used in chemical, petroleum, textile, food and other fields. In the pipeline system, it can receive control equipment or The signal emitted by the components is automatically turned on and off, realizing the automatic adjustment and remote control of the fluid in the pipeline. The state shown in the figure is that the entire valve body is in a closed state, and the fluid inlet channel of the valve body 13 is filled with fluid, and a part of the fluid enters the upper chamber of the piston 10 through the guide 7, so that a pressure difference is generated between the upper and lower chambers of the piston. The pressure of the cavity is greater than the pressure of the lower cavity, so the pressure of the upper cavity and the elastic force of the spring (12) will press down on the piston 10, so that the gasket 11 on the piston is sealed with the fluid inlet of the lower cavity to prevent fluid flow. When the electromagnetic device 1 is energized, due to the magnetism of the electromagnet, the iron core 3 is attracted upwards, driving the valve core 4 to move upwards, so that the pilot hole 15 in the sealed state and the sealing plug 16 are in an open state, and are in the upper cavity of the piston 10. The fluid inside flows to the fluid outlet passage through the guide 7, so that the pressure in the upper chamber of the piston 10 drops rapidly, and a pressure difference is generated with the pressure in the lower chamber, so that the pressure in the lower chamber of the inlet passage is greater than the pressure in the upper chamber, and through this part of the pressure Overcoming the elasticity of the spring 12, the piston 10 is pushed upwards. At this time, the solenoid valve is in an open state, so that the fluid flows from the inlet passage to the lower chamber, and flows through the lower chamber to the outlet passage on the other side, thereby ensuring the fluid flow in the pipeline.

The above-mentioned content of this device has described the specific embodiment of the present utility model with reference to Fig. 1, Fig. 2, those skilled in the art should understand, the utility model product is not limited to the embodiment described above, without departing from the spirit of the present utility model Various modifications can be made under the circumstances, and the modifications should also be included within the scope of the present utility model. The scope of the present invention should be defined by the appended claims and their equivalents.

Claims (2)

1. A piston mechanism pilot solenoid valve, comprising: electromagnetic device (1), iron core (3), spool (4), valve cover (5), screw plug (6), guideway (7), cone Threaded outlet (8), piston ring (9), piston (10), gasket (11), spring (12), valve body (13), tapered threaded inlet (14), pilot hole (15), seal Plug (16) and cable joint (20), characterized in that: The two sides of the valve body (13) are designed with a taper thread connection outlet (8) and a taper thread connection inlet (14). The central part of the valve body (13) is provided with an inner cavity structure, and a piston ( 10), the side position of the piston (10) is matched with a piston ring (9), and the piston ring (9) is sealed with the inner cavity; The bottom of the piston (10) is inlaid with a gasket (11), and the gasket (11) cooperates with the fluid to enter the valve cavity to seal, and a guide (7) is provided on the right side of the valve body (13). (7) Make the upper chamber of the piston (10) communicate with the fluid inlet, and then seal the guide path (7) through the screw plug (6); A spring (12) is installed on the top of the piston (10), the spring (12) is in contact with the upper surface in the cavity, and a pilot hole (15) is opened at the center of the contact with the upper surface of the spring (12), and the sealing plug ( 16) Cooperate with the pilot hole (15), the sealing plug (16) and the valve core (4) are inlaid connection, and there is an insert structure between the two; The upper part of the spool (4) is matched with the shaft hole of the bonnet (5), the bonnet (5) is fixed and sealed by the fastening bolts (17) on both sides, and the top of the bonnet (5) is connected by the fastening bolts ( 18) Connect the electromagnetic device (1) fixedly, the iron core (3) inside the electromagnetic device (1) is connected with the valve core (4), and fixed by the connecting screw (19); the side position of the electromagnetic device (1) is designed with The cable joint (20), the top of the electromagnetic device (1) is fastened by the fastening screw (2). 2. A pilot-operated solenoid valve with a piston mechanism according to claim 1, characterized in that: the small inner cavity on the upper part of the sealing plug (16) and the outlet channel of the valve body (13) are connected through the guide path (7). connect.