CN210978539U

CN210978539U - Zero-clearance micro flow regulating valve

Info

Publication number: CN210978539U
Application number: CN201921803065.4U
Authority: CN
Inventors: 商国兴; 陈传苗
Original assignee: Zhejiang Berghol Automation Engineering Co ltd
Current assignee: Zhejiang Baohe Industrial Technology Group Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-07-10
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a small flow control valve in zero clearance, including valve body and disk seat, be provided with in the valve body the disk seat, the disk seat up end is provided with the valve gap, the disk seat with the valve gap passes through bolted connection, water inlet and delivery port have been seted up respectively to the valve body both sides, be provided with the valve pistil on the disk seat, the valve pistil with be provided with the bush between the disk seat, valve pistil up end is provided with the valve rod, the valve rod is kept away from valve pistil one side welding has actuating mechanism, the cavity has been seted up in the disk seat, the cavity respectively with the water inlet with the delivery port is linked together, the valve pistil is located in the cavity, the last V type incision of having seted. The utility model provides an adjustment during minimum flow, effectively prevent to block up simultaneously, reduce the processing degree of difficulty, increase the adjustable range of governing valve.

Description

Zero-clearance micro flow regulating valve

Technical Field

The utility model relates to a governing valve, in particular to small flow control valve in zero clearance.

Background

At present, in the industries such as chemical industry and the like, the demand for micro flow regulation is more and more, a common small-flow regulating valve in the market adopts a plunger type valve seat, the flow characteristic curve is distorted, and the production and the processing are complex. When the flow coefficient is less than 0.1, the throttling area is small, the plunger type throttling surface is annular, the clearance between the valve core and the valve seat is only less than 0.05mm, the processing and the assembly are complex, and the blockage is easy to occur; for the regulating valve with smaller flow coefficient, the regulating valve cannot be processed and produced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a small flow control valve in zero clearance has solved the regulation when minimum flow, effectively prevents to block up simultaneously, reduces the processing degree of difficulty, increases the adjustable range of governing valve.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the zero-clearance micro flow regulating valve comprises a valve body and a valve seat, wherein the valve seat is arranged in the valve body, a valve cover is arranged on the upper end face of the valve seat, the valve seat is connected with the valve cover through bolts, a water inlet and a water outlet are respectively formed in two sides of the valve body, a valve core is arranged on the valve seat, a bushing is arranged between the valve core and the valve seat, a valve rod is arranged on the upper end face of the valve core, one side, away from the valve core, of the valve rod is welded with an executing mechanism, a cavity is formed in the valve seat and is respectively communicated with the water inlet and the water outlet, the valve core is located in the cavity, and a V-shaped notch.

By adopting the technical scheme, after fluid enters from the water inlet, the actuating mechanism is started, the actuating mechanism drives the valve rod and the valve core to move upwards, the V-shaped notch of the valve core and the lining form a throttling surface, the area opening degree is different, the size is different, the flow is adjusted, the throttling area can be very small, the correspondingly adjustable valve flow coefficient is smaller, and finally, when the valve core moves upwards slowly, more and more fluid at the water inlet flows into the water outlet from the V-shaped notch.

Preferably, a gland is arranged above the bushing.

By adopting the technical scheme, the pressing cover presses the shirt sleeve tightly, and the shirt sleeve can deform when being pressed tightly, so that the valve core is hooped tightly, and a gap is reserved between the valve core and the shirt sleeve.

Preferably, a first sealing gasket is arranged on the lower end face of the valve seat.

By adopting the technical scheme, the sealing gasket has the sealing effect.

Preferably, the lining is made of soft sealing wear-resistant materials, PEEK or reinforced polytetrafluoroethylene.

By adopting the technical scheme, the lining is made of soft sealing wear-resistant materials, and the valve core can be deformed more easily when the gland is pressed, so that the valve core hoop is tighter.

Preferably, a second sealing washer is arranged between the valve cover and the valve body.

By adopting the technical scheme, after the valve cover and the valve body are installed, the sealing washer II plays a sealing role.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

fig. 2 is an enlarged view of a portion a of fig. 1.

Reference numerals: 1. a valve body; 2. sealing washer one; 3. a valve seat; 4. a bushing; 5. a gland; 6. a valve stem; 7. a second sealing washer; 8. a bolt; 9. a water inlet; 10. a water outlet; 11. an actuator; 12. a valve core; 13. a V-shaped cut; 14. a cavity.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

The utility model provides a little flow control valve in zero clearance, see fig. 1-2, including valve body 1 and disk seat 3, be provided with disk seat 3 in the valve body 1, the up end of disk seat 3 is provided with the valve gap, disk seat 3 passes through bolted connection 8 with the valve gap, water inlet 9 and delivery port 10 have been seted up respectively to valve body 1 both sides, be provided with valve pistil 12 on the disk seat 3, be provided with bush 4 between valve pistil 12 and the disk seat 3, valve pistil 12 up end is provided with valve rod 6, valve rod 6 keeps away from valve pistil 12 one side welding and has had actuating mechanism 11, seted up cavity 14 in the disk seat 3, cavity 14 is linked together with water inlet 9 and delivery port 10 respectively, valve pistil 12 is located cavity 14, the.

The gland 5 is arranged above the bush 4, the shirt sleeve is compressed by the gland 5, and the shirt sleeve can deform when compressed, so that the valve core 12 is hooped, and a zero gap is formed between the valve core 12 and the shirt sleeve.

A first sealing washer 2 is arranged on the lower end face of the valve seat 3, and the first sealing washer 2 plays a role in sealing.

The lining 4 is made of soft sealing wear-resistant materials, PEEK or reinforced polytetrafluoroethylene, the lining 4 is made of soft sealing wear-resistant materials, and the pressing cover 5 can be deformed more easily when pressed, so that the valve core 12 is clamped more tightly.

A second sealing washer 7 is arranged between the valve cover and the valve body 1, and after the valve cover and the valve body 1 are installed, the second sealing washer 7 plays a sealing role.

In practical operation, after fluid enters from the water inlet 9, the actuator 11 is started, the actuator 11 drives the valve rod 6 and the valve core 12 to move upwards, so that the V-shaped notch 13 of the valve core 12 and the bushing 4 form a throttling surface, the area opening degree is different, the size is different, the flow rate is adjusted, the throttling area can be small, the correspondingly adjustable valve flow coefficient is smaller, and finally, when the valve core 12 moves upwards slowly, more and more fluid in the water inlet 9 flows into the water outlet 10 from the V-shaped notch 13.

Claims

1. A zero-clearance micro flow regulating valve comprises a valve body (1) and a valve seat (3), and is characterized in that the valve seat (3) is arranged in the valve body (1), a valve cover is arranged on the upper end face of the valve seat (3), the valve seat (3) is connected with the valve cover through a bolt (8), a water inlet (9) and a water outlet (10) are respectively formed in two sides of the valve body (1), a valve core (12) is arranged on the valve seat (3), a lining (4) is arranged between the valve core (12) and the valve seat (3), a valve rod (6) is arranged on the upper end face of the valve core (12), an executing mechanism (11) is welded on one side, far away from the valve core (12), of the valve rod (6), a cavity (14) is formed in the valve seat (3), and the cavity (14) is respectively communicated with the water inlet (9) and the water, the valve core (12) is positioned in the cavity (14), and a V-shaped notch (13) is formed in the valve core (12).

2. A zero clearance micro flow control valve according to claim 1 wherein a gland (5) is provided above the bushing (4).

3. A zero-clearance micro flow control valve according to claim 1, characterized in that the lower end face of the valve seat (3) is provided with a first sealing washer (2).

4. The zero clearance micro flow control valve of claim 1, wherein the bushing (4) is made of soft seal wear resistant material, PEEK or ptfe-reinforced.

5. A zero-clearance micro flow control valve according to claim 1, characterized in that a second sealing washer (7) is arranged between the valve cover and the valve body (1).