CN210318636U

CN210318636U - Three-way control valve

Info

Publication number: CN210318636U
Application number: CN201920902886.7U
Authority: CN
Inventors: 朱粉华; 邹喜; 范小娟
Original assignee: Wuxi Xhk Valve Co ltd
Current assignee: Wuxi Xhk Valve Co ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-04-14
Anticipated expiration: 2029-06-14

Abstract

The utility model provides a three-way control valve, which has good sealing effect, can meet the use effect of different working conditions and can prolong the service life; the valve body is of a four-way structure, a valve core is arranged in the valve body, a pressure reducing valve is arranged at the input end of the actuating mechanism, a push rod is connected to the output end of the actuating mechanism, the push rod is connected with a valve rod, the lower end of the valve rod penetrates through a valve cover and then extends into the valve body to be connected with the valve core, the valve cover is fixedly connected with the valve body, an upper valve seat, a sleeve and a lower valve seat which are identical in inner diameter and balance cylinder are sequentially arranged in the valve body from top to bottom, the upper valve seat, the sleeve and the lower valve seat are arranged at the position of a flow opening of the valve body, a sleeve is sleeved on the outer wall of the valve core, a gap is reserved between the valve core and the valve core, the length of the valve core is smaller.

Description

Three-way control valve

Technical Field

The utility model relates to the technical field of valves, specifically be three-way control valve.

Background

At present, tee bend reposition of redundant personnel (confluence) control valve is the most common valve of using in automated control system's the pipeline, but traditional tee bend reposition of redundant personnel (confluence) control valve still has great noise in the use owing to single structure, receives the fluid impact back for a long time at the valve body, and the valve body is impaired comparatively seriously, and the leakproofness also descends obviously, and the effect of can't realizing cutting off and adjusting flow simultaneously, consequently, the result of use and the life of traditional tee bend reposition of redundant personnel (confluence) control valve are all less than ideal.

Disclosure of Invention

To the problem, the utility model provides a tee bend control valve, it is sealed effectual, can satisfy the result of use of different work condition to can increase of service life.

The technical scheme is as follows: it includes valve body, actuating mechanism and with the locator that actuating mechanism is connected, the valve body is the cross structure, be equipped with the case in the valve body, actuating mechanism's input is equipped with the relief pressure valve, the output is connected with the push rod, the push rod is connected with the valve rod, the valve rod lower extreme passes and stretches into behind the valve gap in the valve body with the case is connected, the valve gap with valve body fixed connection, its characterized in that: the valve body is internally provided with a balance cylinder, an upper valve seat, a sleeve and a lower valve seat which have the same inner diameter from top to bottom in sequence, the upper valve seat, the sleeve and the lower valve seat are arranged at the flow opening of the valve body, the sleeve is sleeved on the outer wall of the valve core, a gap is reserved between the sleeve and the valve core, the length of the valve core is smaller than that of the sleeve, and the sleeve is provided with a flow hole.

It is further characterized in that:

the balance cylinder is arranged between the upper valve seat and the valve cover, and metal winding gaskets are arranged among the upper valve seat, the lower valve seat and the valve body, between the valve cover and the valve body and between the valve cover and the balance cylinder;

the circulation port is divided into a circulation port I, a circulation port II and a circulation port III, and the circulation port I and the circulation port II are positioned on different horizontal lines;

a bracket is connected between the actuating mechanism and the valve cover, and a clamping block is connected between the push rod and the valve rod; the actuating mechanism is a pneumatic film actuating mechanism;

a gap between the valve rod and the valve cover is filled with packing and sealed by a packing gland, a packing spacer bush is arranged between the packing, a packing pressing plate is arranged above the packing gland, and the packing pressing plate and the valve cover are fixed by bolts;

and hard alloy is welded on the sealing surfaces of the valve core, the upper valve seat and the lower valve seat in a surfacing mode.

The beneficial effects of the utility model are that, the case passes through the actuating mechanism effect, and up-and-down motion in the valve body, and in the motion process, through the last disk seat that sets up, sleeve, lower disk seat and the flow hole on the sleeve, can realize cutting off and adjust the purpose of fluid flow, collect two synthetic integrations of single seat valve in other words, can satisfy the result of use of different work condition, and sealed effectual, prolonged life, better economic use value has.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention (in a case where a fluid flow passage on one side is open);

fig. 2 is a schematic structural diagram of a first embodiment of the present invention (in a case where a bottom fluid flow passage is opened);

fig. 3 is a schematic structural diagram of a first embodiment of the present invention (in a case where fluid flow passages are all open);

fig. 4 is a schematic structural view of a second embodiment of the present invention (in a case where a fluid flow passage on one side is opened);

fig. 5 is a schematic structural view of a second embodiment of the present invention (in a case where a bottom fluid flow passage is opened);

fig. 6 is a schematic structural view of a second embodiment of the present invention (in a case where fluid flow passages are all open).

Detailed Description

Example one

As shown in fig. 1-3, the utility model comprises a valve body 2, an actuator 1 and a positioner 3 connected with the actuator 1, the valve body 2 is a four-way structure, a valve core 4 is arranged in the valve body 2, the input end of the actuator 1 is provided with a pressure reducing valve 5, the output end is connected with a push rod 6, the push rod 6 is connected with a valve rod 7, the lower end of the valve rod 7 passes through a valve cover 8 and then extends into the valve body 2 to be connected with the valve core 4, the valve cover 8 is fixedly connected with the valve body 2, a balance cylinder 9 and an upper valve seat 10, a sleeve 11 and a lower valve seat 12 with the same inner diameter are sequentially arranged in the valve body 2 from top to bottom, the upper valve seat 10, the sleeve 11 and the lower valve seat 12 are arranged at the flow opening of the valve body 2, the sleeve 11 is sleeved on the outer wall of the valve core 4, and a gap, the flow area of the fluid medium inlet and the flow of the fluid medium can be changed, the flow holes can be set to be corresponding special-shaped holes according to the situation, and meanwhile, the sleeve 11 can be provided with the jet-type small holes to achieve the functions of reducing noise and resonance.

The balance cylinder 9 is arranged between the upper valve seat 10 and the valve cover 8, and metal winding gaskets 16 are arranged among the upper valve seat 10, the lower valve seat 12 and the valve body 2, between the valve cover 8 and the valve body 2 and between the valve cover 8 and the balance cylinder 9;

the circulation ports are divided into a circulation port I13, a circulation port II 14 and a circulation port III 15, and the circulation port I13 and the circulation port II 14 are located on different horizontal lines;

a bracket 17 is connected between the actuating mechanism 1 and the valve cover 8, and a clamping block 18 is connected between the push rod 6 and the valve rod 7; the actuating mechanism 1 is a pneumatic film actuating mechanism, and can also adopt an electric actuating mechanism;

the gap between the valve rod 7 and the valve cover 8 is filled with the packing 19 and sealed by the packing gland 20, and the packing 19 is arranged, so that the sealing effect can be improved, and the leakage amount can be reduced; a packing spacer 21 is arranged between the packings 19, a packing pressure plate 22 is arranged above the packing gland 20, the packing gland 20 is used for compressing the packings 19 to seal the packings 19, and the packing pressure plate 22 and the valve cover 8 are fixed through bolts 23;

hard alloy is welded on the sealing surfaces of the valve core 4, the upper valve seat 10 and the lower valve seat 12 in a surfacing mode, so that the scouring damage of media to the opening and closing parts can be reduced, and the service life is prolonged.

The pressure reducing valve 5 is used for adjusting the supply pressure to a pressure value required by the positioner 3 and the control system; the valve body 2 is used for ensuring the connection with a pipeline and fixing the positions of the internal part of the adapting valve and the valve cover 8; the valve core 4 adopts a plunger form, so that the flow of fluid can be regulated under the condition of high pressure difference, and the stability is ensured; the balance cylinder 9 plays an internal supporting role, and ensures the relative position of each valve internal part in the valve body 2; the upper valve seat 10 and the lower valve seat 12 are fixed in the valve body 2, are matched with the valve core 4 for use, and are matched with the valve core 4 at different positions to achieve the purpose of controlling and adjusting the flow of fluid; the valve cover 8 is combined with the valve body 2 to ensure that the medium in the control valve does not leak; the sleeve 11 and the windows arranged on the sleeve 11 are added, so that the flow area of the fluid medium inlet and the flow rate of the fluid medium can be changed.

The utility model discloses in, when ventilating 25, locator 3 accepts 4mA ~ 20mA direct current signal from control system and controls to actuating mechanism 1 delivery air, with the control flap position, realize electric automation control, then atmospheric pressure increases and promotes actuating mechanism 1's film head 24, the reaction force of actuating mechanism 1 self spring is overcome to the thrust of production, make push rod 6 reach the position of regulation, push rod 6 passes through clamp splice 18 with valve rod 7 and links to each other, valve rod 7 links to each other with case 4, the rise height of case 4 has been controlled promptly, then the valve utilizes case 4 action and last disk seat 10, the clearance comes control fluid flow between lower disk seat 12, lean on spring reset's elasticity to make push rod 6 get back to initial position when losing gas.

Specifically, when a signal is sent, the actuator 1 raises the valve element 4 under the action of compressed air, and the valve element 4 is in close contact with the sealing surface of the upper valve seat 10, so that the flow port II 14 is closed, and the flow port I13 and the flow port III 15 are opened, as shown in FIG. 2; when no signal is generated, the actuating mechanism 1 pushes the valve core 4 downwards by the elastic force of the self spring reset, so that the valve core 4 descends, the valve core 4 is in close contact with the sealing surface of the lower valve seat 12, the flow port III 15 is closed, and the flow port I13 and the flow port II 14 are opened, as shown in FIG. 1; the valve core 4 can be positioned at different height positions of the window of the sleeve 11 under the action of the positioner 3, so that the purpose of adjusting the fluid flow can be achieved, for example, the valve core 4 is positioned at a position of half the height of the window of the sleeve 11, and the fluid medium is in a shunt state, as shown in fig. 3.

Fig. 1 to 3 show a flow-splitting control valve (one inlet and two outlet), in which the flow direction of the fluid medium in different fluid flow passages is shown by the dashed arrows, wherein a flow port i 13 is used as a fluid medium inlet, and a flow port ii 14 and a flow port iii 15 are used as fluid medium outlets.

Example two

When a signal is sent, the actuating mechanism 1 enables the valve core 4 to ascend under the action of compressed air, and the valve core 4 is in close contact with the sealing surface of the upper valve seat 10, so that the flow port II 14 is closed, and the flow port I13 and the flow port III 15 are opened, as shown in FIG. 5; when no signal is generated, the actuating mechanism 1 pushes the valve core 4 downwards by the elastic force of the self spring reset, so that the valve core 4 descends, the valve core 4 is in close contact with the sealing surface of the lower valve seat 12, the flow port III 15 is closed, and the flow port I13 and the flow port II 14 are opened, as shown in FIG. 4; wherein, the valve core 4 can be positioned at different height positions of the window of the sleeve 11 under the action of the positioner 3, and the purpose of adjusting the fluid flow can be achieved, for example, the valve core 4 is positioned at a position of half height of the window of the sleeve 11, and the fluid medium is in a confluence state, as shown in fig. 6.

Fig. 4 to 6 show a flow-combining type (two-in one-out) control valve, in which the dashed arrows indicate the flow directions of the fluid medium in different fluid flow channels, wherein the flow port i 13 serves as a fluid medium outlet, and the flow ports ii 14 and iii 15 both serve as fluid medium inlets.

To sum up, the utility model discloses compact structure, light in weight, action are sensitive, can realize shunting type and confluence type control according to the condition, and two single-seat valves are synthetic integrative in other words, satisfy the operation requirement of different operating modes, and especially the wide application keeps at the given value in the technological parameter of media such as pressure, flow, temperature, liquid level of accurate control gas, liquid, steam, is suitable for to fall into two routes outflow or merge two kinds of fluids into a fluidic operating mode into one kind of fluid.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The three-way control valve comprises a valve body, an actuating mechanism and a positioner connected with the actuating mechanism, wherein the valve body is of a four-way structure, a valve core is arranged in the valve body, the input end of the actuating mechanism is provided with a pressure reducing valve, the output end of the actuating mechanism is connected with a push rod, the push rod is connected with a valve rod, the lower end of the valve rod penetrates through a valve cover and then extends into the valve body and is connected with the valve core, and the valve cover is fixedly connected with the valve body and is characterized in that: the valve body is internally provided with a balance cylinder, an upper valve seat, a sleeve and a lower valve seat which have the same inner diameter from top to bottom in sequence, the upper valve seat, the sleeve and the lower valve seat are arranged at the flow opening of the valve body, the sleeve is sleeved on the outer wall of the valve core, a gap is reserved between the sleeve and the valve core, the length of the valve core is smaller than that of the sleeve, and the sleeve is provided with a flow hole.

2. The three-way control valve of claim 1, wherein: the balance cylinder is arranged between the upper valve seat and the valve cover, and metal winding gaskets are arranged between the upper valve seat, the lower valve seat and the valve body, between the valve cover and the valve body and between the valve cover and the balance cylinder.

3. The three-way control valve of claim 1, wherein: circulation mouth divide into circulation mouth I, circulation mouth II, circulation mouth III, circulation mouth I, circulation mouth II are located different levels.

4. The three-way control valve of claim 1, wherein: a bracket is connected between the actuating mechanism and the valve cover, and a clamping block is connected between the push rod and the valve rod; the actuating mechanism is a pneumatic film actuating mechanism.

5. The three-way control valve of claim 1, wherein: the valve comprises a valve rod, a valve cover and a filler, wherein the valve rod is arranged in the valve cover, the filler is filled in a gap between the valve rod and the valve cover and sealed through a filler gland, a filler spacer sleeve is arranged between the fillers, a filler pressing plate is arranged above the filler gland, and the filler pressing plate and the valve cover are fixed through bolts.

6. The three-way control valve of claim 1, wherein: and hard alloy is welded on the sealing surfaces of the valve core, the upper valve seat and the lower valve seat in a surfacing mode.