CN218913802U - Flow regulating gate valve - Google Patents

Abstract

The utility model relates to a flow regulating gate valve, which comprises a valve body, a valve cover, a valve seat, a gate plate, a valve rod and a hand wheel, wherein the gate plate adopts a single gate plate structure; the method is characterized in that: the flashboard consists of an upper sealing surface part and a lower diversion hole part, the diversion hole part consists of a plurality of small holes in the plane of the flashboard, and the distribution of the small holes in the plane of the flashboard is set according to the same small hole number input per unit rotation angle. The device has the advantages of being good in flow regulation linearity, reliable in sealing performance, long in service life of products and the like.

Description

Flow regulating gate valve

Technical Field

The utility model belongs to the field of valves, and particularly relates to a single-flashboard gate valve. The utility model is suitable for the flow regulating valve of the gas and liquid medium pipeline.

Background

The gate valve is composed of valve body, valve seat, gate plate, valve rod and hand wheel, the sealing surfaces on both sides of gate plate and valve seat in inlet and outlet channels of valve body are matched to form dual sealing pair, the upper end of gate plate is fixedly connected with lower end of valve rod, the upper end of valve rod is connected with hand wheel by means of valve rod nut, the hand wheel is rotated with valve rod nut, and the valve rod guiding device is converted into lifting movement of valve rod to drive gate plate to rise or fall, so that the opening and closing of gate plate can be controlled. In general, as a gate valve for adjusting a flow rate, a single gate structure having a pilot hole is generally used as a gate plate, and the flow rate is controlled and adjusted according to an opening degree between the pilot hole and a flow passage of a valve body. The main disadvantages are: the rotation angle of the hand wheel and the opening degree of the flashboard have nonlinear relation, and the linearity of flow adjustment is poor; the high-speed fluid formed in the small opening state is directly flushed on the plane of the inlet side of the flashboard, so that the sealing surface of the inlet side of the flashboard is damaged by flushing, and the sealing performance of the product is affected; meanwhile, the high-speed fluid with small opening degree changes the flowing direction and then impacts the inner wall of the valve body channel, so that the valve body is eroded and damaged, and the service life of the product is influenced.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the flow regulating gate valve with good flow regulating linearity, reliable sealing performance and long service life.

The technical scheme of the utility model comprises a valve body, a valve cover, a valve seat, a flashboard, a valve rod and a hand wheel, wherein the flashboard adopts a single flashboard structure, the valve seat is arranged in an inlet and outlet channel of the valve body and is matched with sealing surfaces on two sides of the flashboard to form a double sealing pair, the lower end of the valve body is provided with a lower valve cavity, an upper valve cavity is formed between the upper end of the valve body and the valve cover, the lower end of the valve rod is fixedly connected with the upper end of the flashboard, the upper end of the valve rod is in threaded fit with a valve rod nut arranged at the upper end of a bracket, a guide device is arranged between the valve rod and the bracket, and the outer circular surface of the valve rod nut is fixedly connected with the hand wheel; the method is characterized in that: the flashboard consists of an upper sealing surface part and a lower diversion hole part, the diversion hole part consists of a plurality of small holes in the plane of the flashboard, and the distribution of the small holes in the plane of the flashboard is set according to the same small hole number input per unit rotation angle.

In the technical scheme, a lower limiting block and an upper limiting step are arranged at the joint of the lower end of the valve rod and the flashboard.

Compared with the prior art, the utility model has the beneficial effects that the diversion hole is formed by adopting a plurality of small holes, so that the unit rotation angle is equal in investment, the linear adjustment of the flow is realized, the flushing of the fluid on the sealing surface of the flashboard and the valve body is reduced, and the utility model has the advantages of good flow adjustment linearity, reliable sealing performance, long service life of the product and the like.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: the valve comprises a valve body 1, a valve seat 2, a gate plate 3, a valve cover 4, a valve rod 5, a bracket 6, a valve rod nut 7, a hand wheel 8, a lower limiting block 9 and a small hole 10.

Detailed Description

The flow regulating gate valve shown in fig. 1 comprises a valve body 1, a valve cover 4, a valve seat 2, a gate plate 3, a valve rod 5 and a hand wheel 8, wherein the gate plate 3 adopts a single gate plate structure, hard alloy is sprayed on two side planes of the gate plate 3 to form a wear-resistant sealing surface, the valve seat 2 is arranged in an inlet and outlet channel of the valve body 1 and is matched with the sealing surfaces on two sides of the gate plate 3 to form a double sealing pair, a lower valve cavity is arranged at the lower end of the valve body 1, an upper valve cavity is formed between the upper end of the valve body 1 and the valve cover 4, when the gate plate 3 descends, the lower part of the gate plate 3 enters the lower valve cavity, the upper part of the gate plate 3 enters the upper valve cavity when ascending, the lower end of the valve rod 5 is fixedly connected with the upper end of the gate plate 3, the upper end of the valve rod 5 is in threaded fit with a valve rod nut 7 arranged at the upper end of a bracket 6, a guide device is arranged between the valve rod 5 and the bracket 7 to convert rotation of the valve rod nut 7 into linear lifting movement of the valve rod 5, and the outer circle surface of the valve rod nut 7 is fixedly connected with the hand wheel 8; the method is characterized in that: the flashboard 3 consists of an upper sealing surface part and a lower diversion hole part, the diversion hole part consists of a plurality of small holes 10 in the plane of the flashboard 3, the distribution of the small holes 10 in the plane of the flashboard 3 is set according to the same small holes 10 input per unit rotation angle, namely, when the flashboard rotates for one unit angle, the increase number of the small holes 10 in the flow channel of the valve body 1 is equal, so that the rotation angle of the hand wheel 8 and the flow are in linear relation, and the linear regulation of the flow is realized.

The lower end of the valve rod 5 is provided with a lower limiting block 9 and an upper limiting step at the joint of the valve rod 3, the lower limiting block 9 and the bottom surface of the upper valve cavity form a downward limiting for the valve plate 3, and the upper limiting step and the valve cover 4 form an upward limiting for the valve plate 3.

Claims (2)

1. The utility model provides a flow control gate valve, including valve body (1), valve gap (4), disk seat (2), flashboard (3), valve rod (5), hand wheel (8), flashboard (3) adopt single flashboard structure, valve seat (2) install in valve body (1) import and export passageway with flashboard (3) both sides sealed face mutually support and form double seal vice, valve body (1) lower extreme has lower valve pocket, constitute the valve pocket between upper end and valve gap (4), valve rod (5) lower extreme and flashboard (3) upper end fixed connection, the upper end and valve rod nut (7) screw thread fit of installing in support (6) upper end, set up guider between valve rod (5) and support (6), valve rod nut (7) outer disc and hand wheel (8) fixed connection; the method is characterized in that: the flashboard (3) consists of an upper sealing surface part and a lower diversion hole part, the diversion hole part is formed by manufacturing a plurality of small holes (10) in the plane of the flashboard (3), and the distribution of the small holes (10) in the plane of the flashboard (3) is set according to the number of the small holes (10) which are put into the same unit rotation angle.

2. The flow regulating gate valve of claim 1, wherein: the joint of the lower end of the valve rod (5) and the flashboard (3) is provided with a lower limit block (9) and an upper limit step.

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