CN206309956U - Direct-current piston type current-regulating voltage-regulating with filtering controls valve - Google Patents

Abstract

The utility model relates to a direct-current piston type flow-regulating and pressure-regulating control valve with filter, which comprises a main valve body. An intermediate cavity is arranged coaxially inside the main valve body. One side of the intermediate cavity is a water inlet, and the other side of the intermediate cavity is The side is the water outlet, and the middle inner cylinder is coaxially arranged on the middle cavity, and a piston disc for axially sliding the outlet of the cylinder is coaxially arranged in the middle inner cylinder, and the piston valve disc is driven by the crank slider mechanism to move along the middle inner cylinder. The axial sliding movement of the main valve body is provided with a deflector on the water outlet for guiding the medium flow out, the main valve body is screwed with an auxiliary valve body at the water outlet end, and the auxiliary valve body and the main valve body are provided There is a valve seat, the main valve body is provided with a bowl-shaped filter screen on the water inlet, and the convex part of the bowl-shaped filter screen is facing away from the side of the intermediate cavity, and the main valve body is provided with a first drain on the side wall of the water inlet. The side wall of the auxiliary valve body is provided with a second drain port, and ball valves are provided on the first drain port and the second drain port, and the structure is simple.

Description

DC piston flow and pressure regulating control valve with filter

technical field

The utility model relates to a direct-flow piston type current-regulating and pressure-regulating control valve with filter.

Background technique

In the process of using the traditional DC piston-type flow-regulating and pressure-regulating control valve, since the water quality will contain granular impurities, it is necessary to install an additional filter outside the DC-piston-type flow-regulating and pressure-regulating control valve to avoid clogging of impurities The control valve not only has a large assembly length and an uncompact overall structure, but also has a more complicated structure, high cost, and complicated and cumbersome operation.

Utility model content

In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a direct-flow piston type flow-regulating and pressure-regulating control valve with filter, which is not only simple in structure, but also convenient and efficient.

In order to solve the above-mentioned technical problems, the technical proposal of the present invention is: a direct-flow piston type flow-regulating and pressure-regulating control valve with filter, including a main valve body, an intermediate cavity is coaxially arranged inside the main valve body, and the One side of the middle cavity is the water inlet, and the other side of the middle cavity is the water outlet. The middle inner cylinder is coaxially arranged on the middle cavity, and the end of the middle inner cylinder near the water inlet is a closed cylinder. The bottom of the middle inner cylinder is an open mouth at the end near the water outlet. There is a drainage gap between the mouth of the middle inner cylinder and the water outlet. The piston valve disc at the outlet of the cylinder, the piston valve disc is driven by the crank slider mechanism to slide axially along the middle inner cylinder, and the main valve body is provided with a deflector on the water outlet to guide the medium flow out , the main valve body is screwed with an auxiliary valve body at the water outlet end, a valve seat is provided between the auxiliary valve body and the main valve body, and a bowl-shaped filter screen is provided on the water inlet of the main valve body, The convex portion of the bowl-shaped filter screen faces away from the side of the middle chamber, the main valve body is provided with a first drain port on the side wall at the water inlet, and the side wall of the auxiliary valve body is provided with a second drain port , the first water outlet and the second water outlet are provided with ball valves.

Preferably, the shape of the intermediate inner cylinder is a cylindrical structure, the shape of the piston valve flap is a cylindrical structure, and an axial arrangement is arranged between the outer peripheral portion of the piston valve flap and the inner peripheral portion of the intermediate inner cylinder. There is a guide rail for guiding the piston valve disc when it slides axially. The piston valve disc is provided with a piston valve disc frame at the end near the water outlet, and a seal is provided between the piston valve disc and the mouth of the inner cylinder lock up.

Preferably, the slider crank mechanism includes a valve shaft located at the bottom of the middle inner cylinder, the valve shaft is driven to rotate by a motor, a crank is fixedly connected to the end of the valve shaft, and the other end of the crank is hinged There is a connecting rod, and the other end of the connecting rod is hinged on the front end of the piston disc.

Preferably, the deflector is a squirrel-cage deflector, and the squirrel-cage deflector includes a circular cylinder wall, and one end of the cylinder wall is fixedly provided with a connection for screwing with the piston disc frame The other end of the cylinder wall is an open water outlet, several water inlet through holes are opened on the cylinder wall, a sealing ring is provided between the cylinder wall and the piston valve disc, and the outer diameter of the cylinder wall It is the same as the outer diameter of the piston disc, the inner diameter of the intermediate inner cylinder, and the inner diameter of the water outlet.

Preferably, the water inlet through holes are evenly distributed along the circumference of the cylinder wall, the axes of the water inlet through holes pass through the axis of the cylinder wall, the water inlet through holes in the upper and lower parts of the cylinder wall are symmetrical to each other, and the left and right parts The water inlet through holes are symmetrical to each other.

Preferably, the deflector is a fan ring type deflector, and the fan ring type deflector includes a pipe connected to the water outlet, and the end of the pipe near the piston valve disc is a nozzle, A blade ring is fixed on the periphery of the inner wall of the duct, and the blade ring has a plurality of curved blades uniformly distributed around the circumference.

Preferably, the main valve body is fixed with a first connection flange at the water inlet end, and the auxiliary valve body is fixed with a second connection flange at the water outlet end, and the first connection flange is connected to the second connection flange. The flanges are provided with connection through holes.

Preferably, the intermediate inner cylinder is fixedly connected to the intermediate cavity of the main valve body through ribs.

Preferably, the bowl-shaped filter screen includes a circular connecting plate body, and several installation through holes are opened on the upper circumference of the connecting plate body, and the connecting plate body is screwed to the main valve through screws passing through the installation through holes. On the body, the main valve body is fixed with an annular flange for installing the connecting plate body, and there are several threaded holes on the circumference of the annular flange, and the connecting plate body and the ring A number of springs passing through the screws are also arranged between the shaped flanges.

Preferably, the bowl-shaped filter screen also includes a net body fixed on one side of the connecting plate body, the shape of the net body is a conical structure, and the inclined peripheral parts of the net body are sequentially arranged along the direction of water inflow. It is composed of the first filter perimeter, the second filter perimeter and the third filter perimeter, wherein the bus lines of the first filter perimeter, the second filter perimeter, and the third filter perimeter on the same vertical plane are parallel to each other, so The diameter of the lower bottom surface of the first filtering peripheral part is greater than the diameter of the upper bottom surface of the second filtering peripheral part, the diameter of the lower bottom surface of the second filtering peripheral part is larger than the diameter of the upper bottom surface of the third filtering peripheral part, and the diameter of the first filtering peripheral part Between the lower bottom surface of the second filter peripheral part and the upper bottom surface of the second filter peripheral part, and between the lower bottom surface of the second filter peripheral part and the upper bottom surface of the third filter peripheral part are connected as a whole through an annular connecting section. The cross-sectional shape of the peripheral part is a three-stage stepped structure that gradually inclines to the central axis along the direction away from the intermediate cavity.

Compared with the prior art, the utility model has the following beneficial effects: the structure of the direct-current piston-type flow-regulating and pressure-regulating control valve with filter is simple, and the main valve body is provided with a bowl-shaped filter screen on the water inlet, and the bowl-shaped The convex part of the filter screen faces away from the side of the middle chamber, and the granular impurities accumulate towards the edge of the filter screen under the washing of the pressure water. After a period of time, the ball valve of the first drain port can be opened, and the ball valve will discharge water to remove the granular impurities accumulated in the side screen. Take it out of the valve to remove granular impurities in the water on the filter without removing the filter.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Figure 1 is a schematic structural view of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the diversion state under section A-A in Fig. 1 .

Fig. 3 is a schematic structural view of another embodiment of the present invention.

Fig. 4 is a schematic diagram of the diversion state under the section B-B in Fig. 3 .

Fig. 5 is a schematic diagram of the structure of the bowl-shaped filter screen.

FIG. 6 is a schematic diagram in the direction C of FIG. 5 .

detailed description

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows.

As shown in Figures 1 to 6, a DC piston-type flow-regulating and pressure-regulating control valve with filter includes a main valve body 1, and an intermediate chamber 2 is coaxially arranged inside the main valve body, and a middle chamber of the intermediate chamber One side is the water inlet 3, and the other side of the middle chamber is the water outlet, and the middle inner cylinder 5 is coaxially arranged on the middle chamber, and the end of the middle inner cylinder near the water inlet is a closed cylinder bottom, The end of the middle inner cylinder near the water outlet is an open mouth, and there is a drainage gap between the mouth of the middle inner cylinder and the water outlet, and the middle inner cylinder is coaxially provided with a mouth for axially sliding out of the cylinder. The piston valve disc 6 is driven by the crank slider mechanism to slide axially along the middle inner cylinder, and the main valve body is provided with a deflector on the water outlet for guiding the medium flow out. The main valve body is screwed with an auxiliary valve body 7 at the water outlet end, a valve seat 8 is provided between the auxiliary valve body and the main valve body, and a bowl-shaped filter screen is provided on the water inlet of the main valve body 9. The convex portion of the bowl-shaped filter screen is facing away from the side of the middle chamber, the main valve body is provided with a first drain port on the side wall at the water inlet, and the side wall of the auxiliary valve body is provided with a second drain port. Outlet, the first outlet and the second outlet are provided with a ball valve 10; first, the ball valve can be used for detection, can be connected to the pressure gauge on the two ball valves, to detect the pressure of the front and rear valves, the ball valve is in a closed state under working conditions, The valve supplies water normally; secondly, the granular impurities accumulate towards the edge of the filter screen under the scouring of the pressure water. After a period of time, the ball valve of the first drain port can be opened, and the ball valve will discharge water, and the granular impurities accumulated on the side net will be taken out of the valve. The granular impurities in the water on the filter screen can be removed by removing the filter screen.

In the embodiment of the utility model, the piston valve disc is driven by the crank slider mechanism to slide axially along the middle inner cylinder to control the opening between the piston valve disc and the water outlet on the middle chamber (the medium flow area ), so as to achieve the purpose of regulating flow (or pressure).

In the embodiment of the present utility model, the shape of the middle inner cylinder is a cylindrical structure, the shape of the piston valve flap is a cylindrical structure, and the outer periphery of the piston valve flap and the inner periphery of the middle inner cylinder A guide rail 11 is provided in the axial direction for guiding the piston valve disc when it slides axially. The piston valve disc is provided with a piston valve disc frame 12 at the end near the water outlet. A sealing ring 13 is provided between the barrel mouths.

In the embodiment of the present utility model, the crank slider mechanism includes a valve shaft 14 located at the bottom of the middle inner cylinder, the valve shaft is driven to rotate by a motor, and a crank 15 is fixedly connected to the end of the valve shaft. The other end of the crank is hinged with a connecting rod 16, and the other end of the connecting rod is hinged at the front end of the piston disc.

In the embodiment of the present utility model, the deflector is a squirrel-cage deflector 17, and the squirrel-cage deflector includes a circular cylinder wall 18, and one end of the cylinder wall is fixed for connecting with the piston. The connecting end surface 19 of the valve disc frame is screwed, the other end of the cylinder wall is an open water outlet, and several water inlet through holes 20 are opened on the cylinder wall, and a seal is provided between the cylinder wall and the piston valve disc. Ring 13, the outer diameter of the cylinder wall is the same as the outer diameter of the piston disc, the inner diameter of the middle inner cylinder, and the inner diameter of the water outlet.

In the embodiment of the utility model, the water inlet through holes are evenly distributed along the circumference of the cylinder wall, the axes of the water inlet through holes pass through the axis of the cylinder wall, and the water inlet through holes in the upper and lower parts of the cylinder wall The water inlet through holes in the left and right parts are symmetrical to each other.

In the embodiment of the present utility model, the deflector is a fan ring type deflector 21, and the fan ring type deflector includes a pipeline 22 connected to the water outlet, and the pipeline is near the piston valve disc. The end portion of the pipe is a nozzle, and a fan ring is fixed on the inner wall periphery of the pipe, and the fan ring has a plurality of curved fan blades 23 uniformly distributed around the circumference.

In the embodiment of the utility model, as shown in Figures 2 and 4, both the squirrel-cage deflector and the fan-blade ring-type deflector can effectively prevent cavitation damage; for the fan-blade ring-type deflector, the curved fan The blade divides the medium flow into multiple small flows, and makes a spiral flow under the guidance of the fan blade ring. The medium flow is forced to change the flow direction, and the air bubbles that generate cavitation are limited in the center of the pipe, and the rupture of unstable air bubbles is not in the pipe and valve. Therefore, there is no cavitation damage; for the squirrel-cage deflector, when the medium flows through the water inlet through hole, it is divided into multiple high-speed fluids, which are sprayed and collided with the center of the cylinder wall in the radial direction, so that the cavitation is limited In the center of the cylinder wall, there will be no cavitation damage; the squirrel-cage deflector is suitable for high-pressure differential conditions. When the downstream pressure is less than two-thirds of the upstream, the squirrel-cage design is used.

In the embodiment of the utility model, the main valve body is fixed with a first connecting flange 24 at the water inlet end, and the auxiliary valve body is fixed with a second connecting flange 25 at the water outlet end. Both the connecting flange and the second connecting flange are provided with connecting through holes 26 .

In the embodiment of the utility model, the intermediate inner cylinder is fixedly connected with the intermediate chamber of the main valve body through ribs.

In the embodiment of the present utility model, the bowl-shaped filter screen includes an annular connecting plate body 27, and several installation through holes 28 are opened on the upper circumference of the connecting plate body, and the connecting plate body passes through the installation through holes. The screw 29 is screwed on the main valve body, and the main valve body is fixed with a ring-shaped flange 30 for installing the connecting plate body. There are several threaded holes on the circumference of the ring-shaped flange. , between the connecting plate body and the annular flange, several springs 31 are arranged on the screws; after the filter screen is used for a period of time, impurities may adhere to the filter screen, and the filter screen passes through the spring Elastic connection, when impurities need to be cleaned, the filter can be impacted by the water flow, and the filter will vibrate slightly under the action of the spring, which helps to wash away impurities. Compared with the traditional rigid connection, the vibration amplitude and frequency of the filter Larger, more conducive to the cleaning of impurities.

In the embodiment of the present utility model, the bowl-shaped filter screen also includes a net body 32 fixed on one side of the connecting plate body. The direction of water inflow is composed of the first filter peripheral part 33, the second filter peripheral part 34 and the third filter peripheral part 35, wherein the first filter peripheral part, the second filter peripheral part and the third filter peripheral part are in the same vertical The generatrices on the straight plane are parallel to each other, the diameter of the lower bottom surface of the first filter peripheral part is larger than the diameter of the upper bottom surface of the second filter peripheral part, and the diameter of the lower bottom surface of the second filter peripheral part is larger than the upper bottom surface of the third filter peripheral part Diameter, between the lower bottom surface of the first filter peripheral part and the upper bottom surface of the second filter peripheral part, and between the lower bottom surface of the second filter peripheral part and the upper bottom surface of the third filter peripheral part through an annular connecting section 4 Connected as a whole, the cross-sectional shape of the inclined peripheral part of the net body is a three-stage stepped structure gradually inclined to the central axis along the direction away from the intermediate cavity; as shown in Figure 5, due to the lower part of the first filter peripheral part The diameter of the bottom surface is larger than the diameter of the upper bottom surface of the second filter peripheral part, and the diameter of the lower bottom surface of the second filter peripheral part is larger than the diameter of the upper bottom surface of the third filter peripheral part. Upturned at a certain angle in the direction; the first filter perimeter, the second filter perimeter, and the third filter perimeter distributed in steps can realize that when the impurities near the top ball valve accumulate on the edge of the filter screen, the upturned It is difficult to slide downward under the action of the connecting section.

The working principle of the DC piston type flow regulating and pressure regulating control valve with filter is as follows: the main valve body is provided with a bowl-shaped filter screen on the water inlet, and the convex part of the bowl-shaped filter screen faces away from the side of the intermediate cavity, and the granular Impurities are washed by the pressure water and accumulate towards the edge of the filter screen. After a period of time, the ball valve of the first drain can be opened, and the ball valve will discharge water, and the granular impurities accumulated on the side screen will be taken out of the valve. It can be removed without removing the filter screen. Particulate impurities in the water on the net.

The utility model is not limited to the above-mentioned best implementation mode, and anyone can obtain other various forms of direct-flow piston-type current-regulating and pressure-regulating control valves with filtering under the inspiration of the utility model. All equivalent changes and modifications made according to the patent scope of the utility model should belong to the scope of the utility model.

Claims (10)

1. A direct-current piston-type flow-regulating and pressure-regulating control valve with filter, characterized in that: it comprises a main valve body, the interior of the main valve body is coaxially provided with an intermediate cavity, and one side of the intermediate cavity is a water inlet , the other side of the middle cavity is the water outlet, the middle cavity is coaxially provided with a middle inner cylinder, and the end of the middle inner cylinder near the water inlet is a closed cylinder bottom, and the middle inner cylinder is at the The end near the water outlet is an open cylinder mouth, there is a drainage gap between the cylinder mouth and the water outlet of the middle inner cylinder, and a piston valve disc for axially sliding the outlet of the cylinder is coaxially arranged in the middle inner cylinder, so The piston valve flap is driven by the crank slider mechanism to slide axially along the middle inner cylinder. The main valve body is provided with a deflector for guiding the medium flow out at the water outlet. The water outlet end is screwed with an auxiliary valve body, and a valve seat is provided between the auxiliary valve body and the main valve body. The main valve body is provided with a bowl-shaped filter screen on the water inlet, and the convex part of the bowl-shaped filter screen Facing the side away from the intermediate cavity, the main valve body is provided with a first drain port on the side wall at the water inlet, and a second drain port is opened on the side wall of the auxiliary valve body, and the first drain port is connected with the Ball valves are provided on the second drain ports. 2. The DC piston flow and pressure regulating control valve with filter according to claim 1, characterized in that: the shape of the middle inner cylinder is a cylindrical structure, and the shape of the piston disc is cylindrical structure, a guide rail is axially provided between the outer peripheral portion of the piston valve flap and the inner peripheral portion of the middle inner cylinder for guiding the piston valve flap when it slides axially, and the piston valve flap is at the end near the water outlet A piston valve disc frame is provided, and a sealing ring is provided between the piston valve disc and the barrel mouth of the middle inner cylinder. 3. The direct-current piston-type flow-regulating and pressure-regulating control valve with filter according to claim 1, characterized in that: the slider crank mechanism includes a valve shaft located at the bottom of the middle inner cylinder, and the valve shaft passes through The motor is driven to rotate, the end of the valve shaft is fixedly connected with a crank, the other end of the crank is hinged with a connecting rod, and the other end of the connecting rod is hinged at the front end of the piston disc. 4. The direct-flow piston-type flow-regulating and pressure-regulating control valve with filter according to claim 2, characterized in that: the deflector is a squirrel-cage deflector, and the squirrel-cage deflector includes a circular One end of the cylinder wall is fixed with a connection end surface for screwing with the piston disc frame, the other end of the cylinder wall is an open water outlet, and several water inlet through holes are opened on the cylinder wall , A sealing ring is provided between the cylinder wall and the piston valve disc, and the outer diameter of the cylinder wall is the same as the outer diameter of the piston valve disc, the inner diameter of the middle inner cylinder, and the inner diameter of the water outlet. 5. The direct-current piston-type flow-regulating and pressure-regulating control valve with filter according to claim 4, characterized in that: the water inlet through-holes are evenly distributed along the circumference of the cylinder wall, and the axes of the water-inlet through-holes are evenly distributed. Through the axis of the cylinder wall, the water inlet holes in the upper and lower parts of the cylinder wall are symmetrical to each other, and the water inlet holes in the left and right parts are symmetrical to each other. 6. The DC piston-type flow-regulating and pressure-regulating control valve with filter according to claim 2, characterized in that: the deflector is a fan-blade ring-type deflector, and the fan-blade ring-type deflector includes The pipe connected to the water outlet, the end of the pipe near the piston disc is a nozzle, the inner wall of the pipe is fixed with a fan ring, and the fan ring has a plurality of uniformly distributed curved surfaces fan blade. 7. The DC piston flow and pressure regulating control valve with filter according to claim 1, characterized in that: the main valve body is fixed with a first connecting flange at the water inlet end, and the auxiliary valve body is The water outlet end is fixedly provided with a second connecting flange, and both the first connecting flange and the second connecting flange are provided with connecting through holes. 8. The DC piston flow and pressure regulating control valve with filter according to claim 1, characterized in that: the middle inner cylinder is fixedly connected to the middle chamber of the main valve body through a rib plate. 9. The direct-current piston-type flow-regulating and pressure-regulating control valve with filter according to claim 1, characterized in that: the bowl-shaped filter screen includes a circular connecting plate body, and there are several holes on the upper circumference of the connecting plate body. a mounting through hole, the connecting plate body is screwed on the main valve body through a screw passing through the mounting through hole, and a circular ring flange for installing the connecting plate body is fixed on the main valve body. There are several threaded holes on the circumference of the annular flange, and several springs passing through the screws are also arranged between the connecting plate body and the annular flange. 10. The direct-current piston-type flow-regulating and pressure-regulating control valve with filter according to claim 9, characterized in that: the bowl-shaped filter net also includes a net body fixed on one side of the connecting plate body, and the net body The shape of the body is a truncated cone structure, and the inclined peripheral part of the net body is composed of the first filtering peripheral part, the second filtering peripheral part and the third filtering peripheral part in sequence along the water inlet direction, wherein the first filtering peripheral part, The generatrices of the second filter perimeter and the third filter perimeter on the same vertical plane are parallel to each other, the diameter of the lower bottom surface of the first filter perimeter is greater than the diameter of the upper bottom of the second filter perimeter, and the second filter perimeter The diameter of the lower bottom surface of the part is greater than the diameter of the upper bottom surface of the third filter peripheral part, between the lower bottom surface of the first filter peripheral part and the upper bottom surface of the second filter peripheral part, the lower bottom surface of the second filter peripheral part and the third filter The upper and bottom surfaces of the peripheral parts are connected as a whole through annular connecting sections, and the cross-sectional shape of the inclined peripheral part of the mesh body is a three-stage stepped structure that gradually inclines toward the central axis along the direction away from the intermediate cavity.