CN211231792U

CN211231792U - Proportional valve

Info

Publication number: CN211231792U
Application number: CN201921039202.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuhan Xinlirui Electromechanical Equipment Co ltd
Current assignee: Wuhan Xinlirui Electromechanical Equipment Co ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-08-11
Anticipated expiration: 2029-07-03

Abstract

The utility model relates to a proportional valve, which comprises a valve casing, a valve core, a guide rod, a spring, a fixed cover and a solenoid, wherein the valve casing is provided with an inflow chamber, an outflow chamber and a valve seat; the valve seat is provided with a valve port which is communicated with the inflow chamber and the outflow chamber and is matched with the valve core, the end surface of the valve seat close to the outflow chamber is provided with a plurality of flow channels, the flow channels all penetrate through the inner side wall of the valve seat, the valve core is movably arranged in the valve port, the guide rod is arranged in the valve shell, the lower end of the guide rod is fixedly connected with the bottom wall of the outflow chamber, the upper end of the guide rod penetrates through the valve core and then extends into the inflow chamber and is fixedly connected with the top wall of the inflow chamber, and the spring is sleeved on the guide rod; the solenoid is arranged on the valve casing, and the fixed cover is sleeved on the guide rod positioned in the inflow chamber. The utility model has the advantages that: the flow control device can regulate and control the amount of the air flow entering the outflow chamber, and improves the flow control precision.

Description

Proportional valve

Technical Field

The utility model relates to a valve field especially relates to a proportional valve.

Background

The proportional valve is a valve capable of continuously controlling the flow of corresponding media, and is widely applied to various fields of gas appliances, vehicles, medical appliances and the like. For example, in a gas appliance, a proportional valve is a core control component, and the output pressure can be stabilized under the condition of gas inlet pressure fluctuation through the pressure regulating and pressure stabilizing functions of the proportional valve. Meanwhile, the proportional valve also has the function of switching on and off a gas pipeline, so that a gas channel can be cut off when the gas appliance is closed, the gas is prevented from flowing and leaking, and the personal safety of a user is protected. However, the conventional proportional valve has a problem of poor control accuracy in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a proportional valve is provided to overcome not enough among the above-mentioned prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a proportional valve includes a valve housing having an inflow chamber on an upper side, an outflow chamber on a lower side, and a valve seat between the inflow chamber and the outflow chamber; the valve seat is provided with a valve port which is communicated with the inflow chamber and the outflow chamber and is matched with the valve core, a plurality of flow channels are arranged on the lower end face of the valve seat, each flow channel extends to a position close to the upper end face of the valve seat, the flow channels penetrate through the inner side wall of the valve seat, the valve core is movably arranged in the valve port, the guide rod is arranged in the valve shell, the lower end of the guide rod is fixedly connected with the bottom wall of the outflow chamber, the upper end of the guide rod penetrates through the valve core and then extends into the inflow chamber and is fixedly connected with the top wall of the inflow chamber, the spring is sleeved on the guide rod positioned in the outflow chamber, and the two ends of the spring respectively abut against; the solenoid is set on the valve casing, the fixing cover is set on the guide rod inside the inflow chamber, and the solenoid applies downward pressing force to the spring via the fixing cover and the valve core in the energized state to make the inflow chamber, the valve port, the flow passage and the outflow chamber communicated successively.

The utility model has the advantages that: through setting up the case activity in the valve port to and set up the guide bar and lead to case, fixed lid, spring, make case and spring be difficult for taking place the slope, set up the runner in the valve port simultaneously, the case can stabilize the size of opening of regulation and control runner in the in-process that moves up and down in the valve port like this, thereby realizes regulating and controlling what of the indoor gas flow that enters into the outflow, has promoted flow control's precision.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the number of the flow passages is 3-12, the flow passages are circumferentially distributed on the inner side wall of the valve seat, the angles of two adjacent flow passages are equal, and all the flow passages have the same structure.

The adoption of the further beneficial effects is as follows: can guarantee that the gas case each side pressurized equals when entering into the runner by the valve port, avoid the case because of each side pressurized inequality appear the card phenomenon and cause the problem that control accuracy is low.

Further, the width of the flow channel close to the upper end face of the valve core is smaller than the width of the flow channel close to the lower end face of the valve core.

Further, the width of the flow channel increases linearly from top to bottom.

The beneficial effects of the two steps are as follows: as the spool moves downward, the amount of airflow into the outflow chamber will be greater to adjust the size of the flame.

Furthermore, one end of the valve port close to the inflow chamber is provided with a protruding part, and the upper end of the valve core is abutted against the lower end face of the protruding part.

The adoption of the further beneficial effects is as follows: and the valve core is prevented from being separated from the valve port when the proportional valve does not work.

Furthermore, the lower end of the guide rod is fixedly connected with the bottom wall of the outflow chamber through a screw.

Further, the upper end of the guide rod is fixedly connected with the top wall of the inflow chamber through a screw.

The beneficial effects of the two steps are as follows: the stability is good after connecting, easy dismounting.

Furthermore, a filter device is arranged in the inflow port of the inflow chamber.

The adoption of the further beneficial effects is as follows: can filter the gas, prolong proportional valve's life-span.

Further, the filtering device comprises a filter screen seat and a filter screen, and the filter screen is arranged in the filter screen seat.

Furthermore, the filter screen is made of an active carbon material.

The beneficial effects of the two steps are as follows: the gas filter can filter particles, moisture and oil in gas, is beneficial to prolonging the service life of the proportional valve, and can avoid the situation that the valve core is blocked after the particles enter the proportional valve.

Drawings

Fig. 1 is a schematic structural diagram of the proportional valve of the present invention;

fig. 2 is a schematic structural view of the filtering device of the present invention;

fig. 3 is a schematic structural view of the valve seat.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the valve comprises a valve shell, 110, an upper shell, 111, an inflow port, 120, a lower shell, 130, an end cover, 131, a mounting cavity, 140, a valve seat, 141, a valve port, 142, a flow passage, 143, a protrusion, 150, an inflow chamber, 160, an outflow chamber, 2, a valve core, 3, a guide rod, 4, a spring, 5, a fixed cover, 6, a solenoid, 610, a coil, 620, a movable iron core, 7, a filter device, 710, a filter screen seat, 720, a filter screen, 8 and a sealing ring.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1, 2 and 3, a proportional valve includes a valve housing 1, a valve core 2, a guide rod 3, a spring 4, a fixed cover 5 and a solenoid 6, wherein the valve housing 1 has an upper inflow chamber 150, a lower outflow chamber 160 and a valve seat 140 between the inflow chamber 150 and the outflow chamber 160, the valve seat 140 is provided with a valve port 141, the inflow chamber 150 and the outflow chamber 160 are communicated through the valve port 141, the valve port 141 is matched with the valve core 2, the valve core 2 is arranged in the valve port 141, the cross-sectional shape of the valve core 2 can be circular or polygonal, the cross-sectional shape of the valve port 141 is the same as the cross-sectional shape of the valve core 2, and the cross-sectional shape of the valve core 2 is preferably. The lower end surface of the valve seat 140 is provided with a plurality of flow channels 142, each flow channel 142 extends to the upper end surface of the valve seat 140, but does not penetrate through the upper end surface of the valve seat 140, and the flow channels 142 penetrate through the wall surface of the valve port 141.

The valve core 2 is movably disposed in the valve port 141, the guide rod 3 is disposed in the valve housing 1, a lower end of the guide rod 3 is fixedly connected to a bottom wall of the outflow chamber 160, and an upper end of the guide rod 3 penetrates the valve core 2, extends into the inflow chamber 150, and is fixedly connected to a top wall of the inflow chamber 150. The spring 4 is sleeved on the guide rod 3 in the outflow chamber 160, and two ends of the spring 4 respectively abut against the bottom wall of the outflow chamber 160 and the lower end surface of the valve core 2. The solenoid 6 is arranged on the valve housing 1, the fixing cover 5 is sleeved on the guide rod 3 positioned in the inflow chamber 150, after the whole structure is installed, the valve core 2 is positioned at the valve port 141, and the valve core 2 shields all the flow channels 142, namely, the inflow chamber 150 is not communicated with the outflow chamber 160, the solenoid 6 applies downward pressing force to the spring 4 through the fixing cover 5 and the valve core 2 in the energized state, and the inflow chamber 150, the valve port 141, the flow channels 142 and the outflow chamber 160 are sequentially communicated, namely, after the solenoid 6 is energized, the solenoid 6 applies downward pressing force to the fixing cover 5, the fixing cover 5 will move downwards, and after the fixing cover 5 moves downwards, the valve core 2 will be pushed to move, and when the valve core 2 moves downwards slowly, the inflow chamber 150, the valve port 141, the flow channels 142 and the outflow chamber 160 will be sequentially communicated.

Example 2

As shown in fig. 1, fig. 2, and fig. 3, the present embodiment is a further improvement on embodiment 1, and specifically includes:

the number of the flow channels 142 is 3-12, and may be 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 actually, all the flow channels 142 are circumferentially distributed on the inner side wall of the valve seat 140, and the angles of two adjacent flow channels 142 are equal, preferably, equal angular distribution, so that it can be ensured that the pressure on each side of the valve element 2 is equal when the gas enters the flow channels 142 from the valve port 141, and the problem of low control precision caused by the fact that the pressure on each side of the valve element 2 is unequal is avoided.

The width of the flow channel 142 near the upper end surface of the valve core 2 is smaller than the width of the flow channel 142 near the lower end surface of the valve core 2, so that the air flow entering the outflow chamber 160 will be larger and larger along with the downward movement of the valve core 2, so as to adjust the size of the flame.

The depth of the valve port 141 is 10mm-30mm, and the length of the valve core 2 is 10mm-30 mm. The valve port 141 is provided with a projection 143 near one end of the inflow chamber 150, the upper end of the valve core 2 abuts against the lower end surface of the projection 143 when the solenoid 6 is not energized, the projection 143 is preferably annular, the difference between the inner diameter and the outer diameter of the projection 143 is 3mm-5mm, and the projection 143 is mainly provided to prevent the valve core 2 from separating from the valve port 141 when the proportional valve does not work.

The valve port 141 is provided with an annular groove on a wall surface between the protrusion 143 and the flow channel 142, a sealing ring 8 is provided in the annular groove, and the sealing ring 8 realizes the sealing contact between the outer surface of the valve element 2 and the wall surface of the valve port 141, so that the gas leakage can be effectively prevented, and the safety performance can be improved.

The lower extreme of guide bar 3 passes through screw and the diapire fixed connection of outflow chamber 160, is equipped with socket hole on the diapire of outflow chamber 160, and the lower extreme of guide bar 3 stretches into in the socket hole, and the screw setting is outside valve casing 1, and the screw passes behind the valve casing 1 and is connected with the lower extreme of guide bar 3. The upper end of the guide rod 3 is fixedly coupled to the top wall of the inflow chamber 150 by a screw.

The filter device 7 is arranged in the inflow port 111 of the inflow chamber 150, wherein the filter device 7 comprises a filter screen seat 710 and a filter screen 720, the filter screen 720 is arranged in the filter screen seat 710, the filter screen seat 710 and the inflow port 111 are fixed in a threaded connection manner, the filter screen 720 is made of an activated carbon material, the number of the filter screens 720 arranged in the filter screen seat 710 is multiple, the mesh density of each filter screen 720 is different, the filter screen 720 can be a straight mesh, an inclined mesh or a curved mesh, and when gas enters the inflow port 111, the filter screen 720 can filter particles, moisture and oil in the gas, which is beneficial to prolonging the service life of the proportional valve.

The valve housing 1 is formed by coupling an upper housing 110 forming an inflow chamber 150 and a valve seat 140 with a lower housing 120 forming an outflow chamber 160, and the upper housing 110 is further provided with a cap 130, and the cap 130 covers an upper opening of the upper housing 110.

The solenoid 6 comprises a coil 610 and a movable iron core 620, the coil 610 is arranged around the end cover 130, a mounting cavity 131 is arranged in the surrounding area of the coil 610 on the end cover 130, the movable iron core 620 is arranged in the mounting cavity 131, the length of the mounting cavity 131 is larger than or equal to the sum of the length of the movable iron core 620 and the length of the valve core 2, the upper end of the fixed cover 5 extends into the mounting cavity 131 and is in contact with the lower end of the movable iron core 620, and the upper end of the guide rod 3 penetrates through the movable iron core 620 and is connected with the upper end of the end cover 130 through a screw.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A proportional valve, characterized by comprising a valve housing (1), a valve core (2), a guide rod (3), a spring (4), a fixed cover (5) and a solenoid (6), the valve housing (1) having an inflow chamber (150) on the upper side, an outflow chamber (160) on the lower side, and a valve seat (140) between the inflow chamber (150) and the outflow chamber (160); a valve port (141) which is communicated with the inflow chamber (150) and the outflow chamber (160) and is matched with the valve core (2) is arranged on the valve seat (140), a plurality of flow channels (142) are arranged on the lower end surface of the valve seat (140), and each flow passage (142) extends to a position close to the upper end face of the valve seat (140), the flow passages (142) penetrate through the inner side wall of the valve seat (140), the valve core (2) is movably arranged in the valve port (141), the guide rod (3) is arranged in the valve casing (1), and the lower end of the guide rod (3) is fixedly connected with the bottom wall of the outflow chamber (160), the upper end of the guide rod (3) passes through the valve core (2) and then extends into the inflow chamber (150) and is fixedly connected with the top wall of the inflow chamber (150), the spring (4) is sleeved on the guide rod (3) positioned in the outflow chamber (160), and two ends of the spring (4) respectively abut against the bottom wall of the outflow chamber (160) and the lower end surface of the valve core (2); the solenoid (6) is arranged on the valve casing (1), the fixed cover (5) is sleeved on the guide rod (3) positioned in the inflow chamber (150), and the solenoid (6) exerts downward pressing force on the spring (4) through the fixed cover (5) and the valve core (2) in an electrified state so as to enable the inflow chamber (150), the valve port (141), the flow channel (142) and the outflow chamber (160) to be communicated in sequence.

2. The proportioning valve of claim 1 wherein the number of said flow passages (142) is 3-12, all flow passages (142) are circumferentially distributed on the inner sidewall of said valve seat (140), the angle of two adjacent flow passages (142) is equal, and all flow passages (142) have the same structure.

3. A proportional valve according to claim 2, wherein the width of the flow channel (142) near the upper end of the spool (2) is smaller than the width of the flow channel (142) near the lower end of the spool (2).

4. A proportional valve according to claim 3, wherein the width of the flow channel (142) increases linearly from top to bottom.

5. A proportional valve according to claim 1, wherein the valve port (141) is provided with a protrusion (143) at its end adjacent to the inflow chamber (150), and the upper end of the valve element (2) abuts against the lower end surface of the protrusion (143).

6. A proportional valve according to any one of claims 1 to 5, wherein the lower end of the guide rod (3) is fixedly connected to the bottom wall of the outflow chamber (160) by means of screws.

7. A proportional valve according to any one of claims 1-5, wherein the upper end of the guide rod (3) is fixedly connected to the top wall of the inflow housing (150) by means of screws.

8. A proportional valve according to claim 1, wherein the inflow (111) of the inflow chamber (150) is provided with a filter device (7).

9. A proportioning valve according to claim 8 wherein the filter device (7) comprises a filter screen seat (710) and a filter screen (720), the filter screen (720) being arranged in the filter screen seat (710).

10. A proportioning valve according to claim 9 wherein said filter screen (720) is made of activated carbon material.