CN211525652U

CN211525652U - Low-inlet high-outlet plastic electromagnetic valve

Info

Publication number: CN211525652U
Application number: CN201921833871.6U
Authority: CN
Inventors: 邓小华; 蒋凯; 夏任杰
Original assignee: NINGBO KAILING PNEUMATIC CO Ltd
Current assignee: NINGBO KAILING PNEUMATIC CO Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-09-18
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a low-inlet high-outlet plastic electromagnetic valve, which comprises a valve body and a valve cover, wherein the side wall of the valve body is respectively provided with an inlet and an outlet, and a valve port for communicating the inlet and the outlet is arranged in the valve body; the valve cover is provided with a pilot assembly, the pilot assembly is fixed on the valve cover through a connecting cover, a pilot cavity is formed between the connecting cover and the valve cover, and the pilot cavity is communicated with the outlet through a pilot runner; the pilot assembly comprises a sleeve, a movable iron core, a static iron core and a coil, and a first spring is arranged between the movable iron core and the connecting cover in a propping manner; the valve cover is fixedly arranged on the valve body, a diaphragm is arranged between the valve cover and the valve body in a pressing mode, a valve cavity is formed between the diaphragm and the valve cover, the valve cavity is communicated with the pilot cavity through a connecting flow passage, and a second spring is arranged between the diaphragm and the valve cover in a propping mode; a clearance passage is formed in the diaphragm and is communicated with the valve cavity and the inlet, and the minimum diameter of the clearance passage is smaller than that of the pilot flow passage. The utility model discloses when possessing and assaulting little, still possess time delay function, long service life and job stabilization's advantage.

Description

Low-inlet high-outlet plastic electromagnetic valve

Technical Field

The utility model relates to an agricultural irrigation technical field, in particular to height is advanced to height plastics solenoid valve.

Background

In the process of crop growth, the influence of natural environment and weather factors is received, particularly, in the aspect of the requirement of crop moisture, the requirement of crop growth cannot be met only by rainwater, so that the moisture is supplemented in an irrigation mode, in an irrigation system, a plurality of pipelines are provided, and a large number of valves are needed to control the operations of on-off of the pipelines, the direction of fluid, the flow rate and the like. Generally, the direction of fluid ingress and egress is distinguished in the industry by a "high ingress and low egress valve" or "low ingress and high egress valve". At present, a direct-acting electromagnetic valve is generally used as a control valve in the market, although the valve is relatively direct and rapid in response and is generally completed instantaneously when being opened or closed, at the moment of fluid reversing, the fluid pressure has large impact on the valve body, and the valve body is easily damaged, the service life is shortened, the frequent maintenance and replacement work is needed, so that the working efficiency is influenced, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a low-in and high-out plastics solenoid valve, when possessing and assaulting for a short time, still possess the time delay function, possess long service life and job stabilization's advantage moreover.

The utility model provides a technical scheme that its technical problem adopted is: the low-inlet high-outlet plastic electromagnetic valve comprises a valve body and a valve cover, wherein the side wall of the valve body is respectively provided with an inlet and an outlet, and a valve port communicated with the inlet and the outlet is arranged in the valve body; a pilot assembly is arranged on the valve cover and is fixed on the valve cover through a connecting cover, a pilot cavity is formed between the connecting cover and the valve cover, and the pilot cavity is communicated with the outlet through a pilot flow channel; the guide assembly comprises a sleeve fixedly arranged on the connecting cover, a movable iron core movably arranged in the sleeve, a static iron core fixedly arranged at the top end of the sleeve and a coil sleeved outside the sleeve, a first spring is arranged between the movable iron core and the connecting cover in a propping manner, and the first spring always has a tendency of pushing the movable iron core to the guide flow channel, so that the movable iron core seals the guide flow channel; the valve cover is fixedly arranged on the valve body, a diaphragm which is in sealing fit with the valve port is pressed between the valve cover and the valve body, a valve cavity is formed between the diaphragm and the valve cover, the valve cavity is communicated with the pilot cavity through a connecting flow channel, a second spring is arranged between the diaphragm and the valve cover in a propping manner, and the second spring always tends to push the diaphragm to the valve port, so that the diaphragm closes the valve port; and a clearance passage is formed in the diaphragm and is communicated with the valve cavity and the inlet, and the minimum diameter of the clearance passage is smaller than that of the pilot flow passage.

Furthermore, a guide rod is fixed in the valve cover and extends along the axial direction of the diaphragm, the guide rod penetrates through the gap channel, and the guide rod is in clearance fit with the gap channel to play a role in guiding the diaphragm, so that no gap is generated when the diaphragm is in sealing fit with the valve port, and the sealing property is improved.

Furthermore, a diaphragm seat is arranged between the diaphragm and the valve body in a pressing mode, the diaphragm seat is sleeved on the outer side of the diaphragm, the diaphragm is convenient to mount, the valve cavity is sealed relatively, the sealing performance is improved, the strength of the diaphragm is improved to a certain extent, and the service life is prolonged.

Furthermore, the diaphragm is bowl-shaped, so that the second spring is convenient to mount, and the sealing performance between the diaphragm and the valve port is improved.

Furthermore, a through hole is formed in the valve cover and is communicated with the valve cavity and the outside, so that fluid in the valve cavity can be conveniently discharged to the outside, safety is improved, and disassembly and assembly are convenient.

Furthermore, a manual rod is arranged on the valve cover and is in threaded sealing connection with the through hole, so that the valve is convenient to operate.

Furthermore, the connecting cover is connected with the valve cover through a fixing seat, a connecting channel for communicating the pilot cavity with the connecting flow channel is formed in the fixing seat, and a valve nozzle for communicating the pilot cavity with the pilot flow channel is arranged in the middle of the fixing seat.

Furthermore, the bottom of the movable iron core is embedded with a sealing gasket, and the sealing gasket is in sealing fit with the valve nozzle, so that the sealing performance is improved.

Furthermore, the fixing base outside cover is equipped with the connecting seat, is convenient for install.

The utility model has the advantages that: the valve body is provided with the valve cover, the valve cover is provided with the pilot assembly, the pilot assembly is fixed on the valve cover through the connecting cover, a pilot cavity is formed between the connecting cover and the valve cover, and the pilot cavity is communicated with the outlet through the pilot runner; a diaphragm is pressed between the valve cover and the valve body, a valve cavity is formed between the diaphragm and the valve cover, and the valve cavity is communicated with the pilot cavity through a connecting flow passage; and a gap passage is arranged on the diaphragm and is communicated with the valve cavity and the inlet, and the minimum diameter of the gap passage is smaller than that of the pilot flow passage. Under normal conditions, the coil is not electrified, the electromagnetic valve is in a closed state, fluid at the inlet does not flow to the outlet, but the fluid at the inlet can fill the pilot cavity and the valve cavity with the fluid through the gap channel and the connecting flow channel, the pressure of the end, which is abutted against the second spring, of the diaphragm is the pressure of the second spring plus the pressure of the fluid, and the pressure of the other end of the diaphragm is only the pressure of the fluid, so that the diaphragm is tightly matched with the valve port, and the sealing property is ensured; when the electromagnetic valve needs to be opened, the coil is electrified, the movable iron core is adsorbed by the static iron core, so that the movable iron core overcomes the elasticity of the first spring, the pilot runner is opened, the fluid in the valve cavity and the pilot cavity flows to the outlet, meanwhile, the fluid flows to the pilot cavity and the valve cavity through the gap channel and the connecting runner, and the minimum diameter of the gap channel is smaller than the minimum diameter of the pilot runner, so that the fluid in the pilot cavity and the valve cavity is slowly reduced, and the pressure of the fluid at the end of the diaphragm, which is abutted against the second spring, is also slowly reduced, so that the valve port is opened stably and slowly, and similarly, the valve port is closed stably and slowly; the problem of impact when the valve port is opened or closed in the prior art is solved, the impact is reduced through the delayed opening or closing function, the service life is prolonged, and the cost is reduced; to sum up, the utility model discloses a delay function alleviates the valve port impact force when opening or closing to possess the advantage that the impact is little, increase life, guarantee job stabilization and reduce the cost.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Shown in the figure: 1-a valve body; 1.1-inlet; 1.2-outlet; 1.3-valve port; 1.4-a pilot flow channel; 2-valve cover; 2.1-connecting the flow channel; 2.2-through holes; 3-connecting the cover; 4-a pilot cavity; 5-sleeving a pipe; 6-movable iron core; 7-a stationary core; 8-a coil; 9-a first spring; 10-a membrane; 10.1-clearance channel; 11-a valve cavity; 12-a second spring; 13-a guide bar; 14-a diaphragm seat; 15-manual lever; 16-a fixed seat; 16.1-connecting channels; 17-a gasket; 18-a connecting socket; 19-O-ring.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1 and 2, the plastic solenoid valve with low inlet and high outlet comprises a valve body 1 and a valve cover 2, wherein the side wall of the valve body 1 is respectively provided with an inlet 1.1 and an outlet 1.2, and a valve port 1.3 for communicating the inlet 1.1 and the outlet 1.2 is arranged in the valve body 1; a pilot assembly is arranged on the valve cover 2, the pilot assembly is fixed on the valve cover 2 through a connecting cover 3, a pilot cavity 4 is formed between the connecting cover 3 and the valve cover 2, and the pilot cavity 4 is communicated with an outlet 1.2 through a pilot runner 1.4; the pilot assembly comprises a sleeve 5 fixedly arranged on the connecting cover 3, a movable iron core 6 movably arranged in the sleeve 5, a static iron core 7 fixedly arranged at the top end of the sleeve 5 and a coil 8 sleeved outside the sleeve 5, wherein a first spring 9 is arranged between the movable iron core 6 and the connecting cover 3 in a propping manner, and the first spring 9 always has a tendency of pushing the movable iron core 6 to the pilot flow channel 1.4, so that the movable iron core 6 seals the pilot flow channel 1.4; the valve cover 2 is fixedly arranged on the valve body 1, a diaphragm 10 which is in sealing fit with the valve port 1.3 is pressed between the valve cover 2 and the valve body 1, a valve cavity 11 is formed between the diaphragm 10 and the valve cover 2, the valve cavity 11 is communicated with the pilot cavity 4 through a connecting flow channel 2.1, a second spring 12 is arranged between the diaphragm 10 and the valve cover 2 in a propping manner, and the second spring 12 always has a tendency of pushing the diaphragm 10 to the valve port 1.3, so that the diaphragm 10 closes the valve port 1.3; the diaphragm 10 is provided with a clearance passage 10.1, the clearance passage 10.1 is communicated with the valve cavity 11 and the inlet 1.1, and the minimum diameter of the clearance passage 10.1 is smaller than that of the pilot flow passage 1.4.

Preferably, the upper half section of the pilot flow channel 1.4 is arranged on the valve cover 2, the lower half section is arranged on the valve body 1, and an O-shaped ring 19 is arranged at the joint of the upper half section and the lower half section, so that the integral sealing performance of the whole pilot flow channel 1.4 is ensured.

Specifically, the inlet 1.1 and the outlet 1.2 are both provided with internal thread structures, so that the electromagnetic valve is convenient to install in a pipeline.

A guide rod 13 is fixed in the valve cover 2, the guide rod 13 extends along the axial direction of the diaphragm 10, the guide rod 13 penetrates through the clearance channel 10.1, and the guide rod 13 is in clearance fit with the clearance channel 10.1.

Preferably, the guide rod 13 is cylindrical and can be fixed in the valve cap 2 in a threaded connection or welding or gluing manner, and specifically, when the diaphragm 10 moves, the guide rod 13 is in clearance fit with the clearance channel 10.1, so that the diaphragm 10 can only move in the axial direction of the guide rod 13, the movement of the diaphragm 10 is more stable and does not generate an inclination phenomenon, and the diaphragm 10 and the valve port 1.3 are sealed more tightly.

A diaphragm seat 14 is pressed between the diaphragm 10 and the valve body 1, and the diaphragm seat 14 is sleeved outside the diaphragm 10; preferably, the diaphragm 10 is bowl-shaped, and the diaphragm 10 is made of flexible material, such as NBR material, to ensure the sealing of the valve port 1.3 without fluid leakage. One end of the second spring 12 abuts against the inner side wall of the valve cap 2, and the other end of the second spring 12 abuts against the upper part of the diaphragm 10, so that the lower surface of the diaphragm 10 abuts against the valve port 1.3, thereby sealing the valve port 1.3.

The valve cover 2 is provided with a through hole 2.2, and the through hole 2.2 is communicated with the valve cavity 11 and the outside; the valve cover 2 is provided with a manual rod 15, and the manual rod 15 is in threaded sealing connection with the through hole 2.2; when the fluid in the valve cavity 11 and the pilot cavity 4 needs to be discharged, the manual rod 15 can be screwed out manually, so that the valve cavity 11 and the pilot cavity 4 are communicated with the outside through the through hole 2.2, and the fluid in the valve cavity 11 and the pilot cavity 4 is discharged, thereby facilitating maintenance or disassembly and assembly.

The connecting cover 3 is connected with the valve cover 2 through a fixed seat 16, a connecting channel 16.1 for communicating the pilot cavity 4 with the connecting flow channel 2.1 is formed in the fixed seat 16, and a valve nozzle 16.2 for communicating the pilot cavity 4 with the pilot flow channel 1.4 is arranged in the middle of the fixed seat 16; preferably, the joint of the fixed seat 16 and the valve cover 2 is also sleeved with an O-shaped ring 19 to ensure the sealing performance of the guide cavity 4.

A sealing gasket 17 is embedded at the bottom of the movable iron core 6, and the sealing gasket 17 is in sealing fit with the valve nozzle 16.2; specifically, a protruding edge (not shown) protrudes from the bottom of the movable iron core 6 along the circumferential direction, one end of the first spring 9 abuts against the inner side wall of the connecting cover 3, and the other end of the first spring 9 abuts against the protruding edge (not shown), so that the first spring 9 can be conveniently mounted.

The outer side of the fixed seat 16 is sleeved with a connecting seat 18, so that the installation of the electromagnetic valve is facilitated.

The utility model discloses a concrete theory of operation: under normal conditions, the coil 8 is not electrified, the electromagnetic valve is in a closed state, the valve port 1.3 is in a closed state, fluid at the inlet 1.1 cannot flow to the outlet 1.2, but the fluid at the inlet 1.1 can fill the pilot chamber 4 and the valve chamber 11 with the fluid through the clearance channel 10.1 and the connecting flow channel 2.1, at this time, the pressure above the diaphragm 10 is the pressure of the second spring 12 plus the pressure of the fluid, and the pressure below the diaphragm 10 is only the pressure of the fluid, so that the diaphragm 10 is tightly matched with the valve port 1.3, and the sealing performance is ensured; when the electromagnetic valve needs to be opened, the coil 8 is electrified, the movable iron core 6 is adsorbed by the static iron core 7, so that the movable iron core 6 overcomes the elasticity of the first spring 9, the pilot flow channel 1.4 is opened, the fluid in the valve cavity 11 and the pilot cavity 4 flows to the outlet 1.2, meanwhile, the fluid flows to the pilot cavity 4 and the valve cavity 11 through the clearance channel 10.1 and the connecting flow channel 2.1, because the minimum diameter of the clearance channel 10.1 is smaller than that of the pilot flow channel 1.4, the outflow speed of the fluid in the relative pilot cavity 4 and the valve cavity 11 is larger than the inflow speed, the fluid in the pilot cavity 4 and the valve cavity 4 is slowly reduced, the pressure above the diaphragm 10 is smaller than the pressure below the diaphragm 10, so that the valve port 1.3 is slowly opened, similarly, the valve port 1.3 is the same when being closed, after the coil 8 is not electrified any more, the first spring 9 closes the pilot flow channel 1.4, the fluid at the inlet 1.1 is closed again through the clearance channel 10.1 and the connecting flow channel 2.1, the pilot chamber 4 and the valve chamber 11 are filled with fluid, so that the pressure above the diaphragm 10 is gradually greater than the pressure below, so that the diaphragm 10 slowly closes the valve port 1.3, and the solenoid valve is kept in a normally closed state.

Please note that the above mentioned "upper" and "lower" are based on the direction of the diaphragm 10 when it is normally used, i.e. the second spring 12 is located at the upper side, and the valve port 1.3 is located at the lower side, and are only for the convenience of more clearly describing the specific embodiment of the present invention, but not for limiting the protection scope of the present invention.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The plastic electromagnetic valve with the lower inlet and the higher outlet comprises a valve body (1) and a valve cover (2), wherein the side wall of the valve body (1) is respectively provided with an inlet (1.1) and an outlet (1.2), and a valve port (1.3) communicated with the inlet (1.1) and the outlet (1.2) is arranged in the valve body (1);

a pilot assembly is arranged on the valve cover (2), the pilot assembly is fixed on the valve cover (2) through a connecting cover (3), a pilot cavity (4) is formed between the connecting cover (3) and the valve cover (2), and the pilot cavity (4) is communicated with the outlet (1.2) through a pilot flow channel (1.4); the pilot assembly comprises a sleeve (5) fixedly arranged on the connecting cover (3), a movable iron core (6) movably arranged in the sleeve (5), a static iron core (7) fixedly arranged at the top end of the sleeve (5) and a coil (8) sleeved outside the sleeve (5), a first spring (9) is arranged between the movable iron core (6) and the connecting cover (3) in a propping manner, and the first spring (9) always has a tendency of pushing the movable iron core (6) to a pilot flow channel (1.4), so that the movable iron core (6) seals the pilot flow channel (1.4);

the valve cover (2) is fixedly arranged on the valve body (1), a diaphragm (10) which is in sealing fit with the valve port (1.3) is arranged between the valve cover (2) and the valve body (1) in a pressing mode, a valve cavity (11) is formed between the diaphragm (10) and the valve cover (2), the valve cavity (11) is communicated with the pilot cavity (4) through a connecting flow channel (2.1), a second spring (12) is arranged between the diaphragm (10) and the valve cover (2) in a supporting mode, and the second spring (12) always has a tendency of pushing the diaphragm (10) to the valve port (1.3), so that the diaphragm (10) closes the valve port (1.3);

the method is characterized in that: a clearance channel (10.1) is formed in the diaphragm (10), the clearance channel (10.1) is communicated with the valve cavity (11) and the inlet (1.1), and the minimum diameter of the clearance channel (10.1) is smaller than that of the pilot flow channel (1.4).

2. The low-inlet high-outlet plastic solenoid valve according to claim 1, characterized in that: the valve cover (2) is internally fixed with a guide rod (13), the guide rod (13) is arranged along the axial extension of the diaphragm (10), the guide rod (13) penetrates through the clearance channel (10.1), and the guide rod (13) is in clearance fit with the clearance channel (10.1).

3. The low-inlet high-outlet plastic solenoid valve according to claim 2, characterized in that: a diaphragm seat (14) is arranged between the diaphragm (10) and the valve body (1) in a pressing mode, and the diaphragm seat (14) is sleeved on the outer side of the diaphragm (10).

4. The low-inlet high-outlet plastic solenoid valve according to claim 3, characterized in that: the membrane (10) is bowl-shaped.

5. The low-inlet high-outlet plastic solenoid valve according to claim 1, characterized in that: a through hole (2.2) is formed in the valve cover (2), and the through hole (2.2) is communicated with the valve cavity (11) and the outside.

6. The low-inlet high-outlet plastic solenoid valve according to claim 5, characterized in that: a manual rod (15) is arranged on the valve cover (2), and the manual rod (15) is in threaded sealing connection with the through hole (2.2).

7. The low-inlet high-outlet plastic solenoid valve according to claim 1, characterized in that: connect lid (3) through fixing base (16) with valve gap (2) are connected, seted up the intercommunication on fixing base (16) leading chamber (4) with connect the interface channel (16.1) of runner (2.1), be equipped with the intercommunication in the middle of fixing base (16) leading chamber (4) with valve mouth (16.2) of leading runner (1.4).

8. The low-inlet high-outlet plastic solenoid valve according to claim 7, characterized in that: the bottom of the movable iron core (6) is embedded with a sealing gasket (17), and the sealing gasket (17) is in sealing fit with the valve nozzle (16.2).

9. The low-inlet high-outlet plastic solenoid valve according to claim 7, characterized in that: the outer side of the fixed seat (16) is sleeved with a connecting seat (18).