CN111379899A

CN111379899A - Right-angle stop valve

Info

Publication number: CN111379899A
Application number: CN201811612990.9A
Authority: CN
Inventors: 章文忠
Original assignee: Hubei Taihe Petrochemical Equipment Co ltd
Current assignee: Hubei Taihe Petrochemical Equipment Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-07

Abstract

The utility model provides a right angle stop valve, includes valve body, valve gap, valve rod and sealing device, and the valve gap is installed on the valve body, the one end of valve rod is equipped with sealed dish, is equipped with sealing device on the sealed dish, sealing device includes the valve clack, and the inside cavity that is equipped with of valve clack, the inside elasticity preforming that is equipped with of cavity, the middle part of elasticity preforming are equipped with the connecting block, and the connecting block is connected with the movable rod, and the movable rod tip passes the valve clack and sealed dish supports and lean on at the valve rod tip, pushes down through the flexible of elasticity preforming, plays sealed effect, simple structure, and intensity is high, and.

Description

Right-angle stop valve

Technical Field

The invention relates to a valve, in particular to a right-angle stop valve.

Background

The angle stop valve opening and closing piece is a plug-shaped sealing device, the sealing surface is a plane or a conical surface, the sealing device moves linearly along the central line of fluid, and the movement form of the valve rod is a lifting rod type (the valve rod is lifted, the hand wheel is not lifted) or a lifting rotating rod type (the hand wheel and the valve rod rotate together to lift, and the nut is arranged on the valve body). Angle shut-off valves are of the positive seal type, so that pressure must be applied to the seal to force the seal face from leaking when the valve is closed. At present, the existing stop valve is generally of a common cock type or flat plug type structure, the material is mainly cast iron, and the existing right-angle stop valve generally has the defects of complex valve structure, low strength, no wear loss, easy leakage, short service life and the like. The existing cast steel stop valve is limited by the processing capacity, the structure is relatively simple, the sealing is affected, and the replacement of easily damaged parts of the stop valve is not convenient enough.

Disclosure of Invention

The invention mainly aims to provide a right-angle stop valve, which solves the problems of complicated valve structure, low strength, no wear loss, easy leakage, short service life and the like of the conventional right-angle stop valve.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a right angle stop valve, includes valve body, valve gap, valve rod and sealing device, and the valve gap is installed on the valve body, the one end of valve rod is equipped with sealed dish, is equipped with sealing device on the sealed dish, sealing device includes the valve clack, and the inside cavity that is equipped with of valve clack, the inside elasticity preforming that is equipped with of cavity, the middle part of elasticity preforming are equipped with the connecting block, and the connecting block is connected with the movable rod, and the movable rod tip passes the valve clack and sealed.

In the preferred scheme, a sealing seat matched with the sealing device is arranged in the valve body, a step is arranged on the inner surface of the sealing seat, a step matched with the step of the sealing seat is arranged on the outer surface of the valve clack, the elastic pressing sheet abuts against the step of the sealing seat when stressed, and the sealing seat is in threaded connection with the valve body.

In the preferred scheme, be equipped with gland nut between valve body and the sealed dish, gland nut and valve rod threaded connection, leave the buffering clearance between valve rod and the gland nut, be equipped with the control pad between gland nut and the sealed dish.

In the preferred scheme, a packing gland is arranged in the middle of the valve cover, sealing packing is arranged between the packing gland and the valve cover, and the sealing packing is uniformly distributed on the periphery of the valve rod.

In a preferred scheme, the sealing filler is flexible graphite or oil-immersed hemp.

In a preferable scheme, the cross section of the elastic pressing sheet is arc-shaped.

In a preferable scheme, the valve flap is made of polyurethane sealant, or fluororubber, or silicone rubber.

In the preferred scheme, the surfaces of the valve rod, the inner cavity of the valve body, the sealing seat and the channel of the sealing seat are sprayed with wear-resistant alloy layers.

In a preferable scheme, the top of the valve rod is connected with a hand wheel, and the valve body, the valve cover and flanges at two ends of the valve body are all made of cast steel.

The invention provides a right-angle stop valve, the end of the valve stem is equipped with the seal disc, install the sealing means on the seal disc, the said sealing means includes the valve flap, the cavity in the valve flap is equipped with the elastic sheeting, the elastic sheeting becomes the arc bow and turns the attitude, when closing the valve, the seal disc is downward, the valve flap reaches the interior of seal seat, the step of the external surface of the valve flap is supported against the step of the internal surface of seal seat, the valve flap stops moving, the valve stem continues downward at this moment, the movable rod under the valve stem end is supported and pressed by the end of the valve stem, the movable rod transmits the force to the elastic sheeting, the elastic sheeting is deformed by the force, extrude to both sides, limited by the step of the seal seat again, the sealing effect of the valve flap and seal seat is getting better and better at this moment, have solved the common right-angle stop valve intensity.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is an enlarged view of the invention at A;

FIG. 3 is a view of the seal of the present invention;

in the figure: a hand wheel 1; a valve stem 2; a valve cover 3; a packing gland 4; a seal packing 5; a stud bolt 6; a valve body 7; a compression nut 8; a control pad 9; a buffer gap 10; a seal seat 11; a sealing device 12; a valve flap 121; a resilient tab 122; a connecting block 123; a sealant 124; a movable bar 125; a hand wheel nut 13; a gland nut 14; a gland bolt 15; a sealing plate 16; and a seal disk 17.

Detailed Description

As shown in fig. 1 to 3, a right angle stop valve comprises a valve body 7, a valve cover 3, a valve rod 2 and a sealing device 12, wherein the valve cover 3 is arranged on the valve body 7, one end of the valve rod 2 is provided with a sealing disc 17, the sealing disc 17 is provided with a sealing device 12, the sealing device 12 comprises a valve clack 121, a cavity is arranged in the valve clack 121, an elastic pressing sheet 122 is arranged in the cavity, a connecting block 123 is arranged in the middle of the elastic pressing sheet 122, the connecting block 123 is connected with a movable rod 125, the end of the movable rod 125 passes through the valve clack 121 and a sealing disc 17 and abuts against the end of a valve rod 2, and therefore, when the valve rod 2 moves downwards, the valve clack 121 moves downwards, when the valve clack 121 receives resistance, the valve clack 121 stops moving downwards, at the moment, the valve rod 2 continues to move downwards, the end part of the valve rod 2 presses the movable rod 125, the movable rod 125 transmits pressure to the elastic pressing piece 122, and the elastic pressing piece 122 extends towards the periphery to play a role in pressing tight seal.

In a preferable scheme, a sealing seat 11 matched with the sealing device 12 is arranged inside the valve body 7, a step is arranged on the inner surface of the sealing seat 11, a step is arranged on the outer surface of the valve clack 121 and matched with the step of the sealing seat 11, the elastic pressing sheet 122 abuts against the step of the sealing seat 11 when stressed, and the sealing seat 11 is in threaded connection with the valve body 7.

In the preferred scheme, be equipped with gland nut 8 between valve body 7 and the sealed dish 17,

gland nut

8 and 2 threaded connection of valve rod, leave buffer clearance 10 between valve rod 2 and the gland nut 8, be equipped with control pad 9 between gland nut 8 and the sealed dish 17, on the fixed bathing valve rod 2 of sealed dish 17, leave buffer clearance 10 between valve rod 2 and gland nut 8, when raising valve rod 2, can let the inside movable rod 125 of sealing device 12 kick-back, more succinct open valve.

In the preferred scheme, the middle part of the valve cover 3 is provided with the packing gland 4, the sealing packing 5 is arranged between the packing gland 4 and the valve cover 3, and the sealing packing 5 is uniformly distributed on the periphery of the valve rod 2, so that the sealing effect is achieved, and the maintenance is convenient.

In the preferred scheme, the sealing filler 5 is flexible graphite or oil-immersed hemp, different materials are adopted in different transportation environments, and the oil-immersed hemp is selected when transportation media are fresh water, seawater and lubricating oil; flexible graphite is suitable for fuel oil and steam.

In a preferred embodiment, the cross section of the elastic pressing piece 122 is arc-shaped, and can play a role in pressing and rebounding.

In a preferred scheme, the valve flap 121 is made of polyurethane sealant, or fluororubber, or silicone rubber, which is a wear-resistant material.

In the preferred scheme, the surfaces of the valve rod 2, the inner cavity of the valve body 7, the sealing seat 11 and the channel of the sealing seat 11 are coated with wear-resistant alloy layers, so that the wear-resistant function can be achieved.

In the preferred scheme, the top of the valve rod 2 is connected with a hand wheel 1, the valve body 7, the valve cover 3 and flanges at two ends of the valve body 7 are all made of cast steel, and cast steel can be adopted for production after the problem that the valve made of cast steel is low in precision is solved.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. The utility model provides a right angle stop valve, includes valve body (7), valve gap (3), valve rod (2) and sealing device (12), and valve gap (3) are installed on valve body (7), characterized by: sealing dish (17) is equipped with to the one end of valve rod (2), is equipped with sealing device (12) on sealing dish (17), sealing device (12) are equipped with elasticity preforming (122) including valve clack (121), valve clack (121) inside, and the cavity is inside, and the middle part of elasticity preforming (122) is equipped with connecting block (123), and connecting block (123) are connected with movable rod (125), and movable rod (125) tip passes valve clack (121) and sealing dish (17) and supports and lean on valve rod (2) tip.

2. A right angle stop valve as defined in claim 1, wherein: the valve is characterized in that a sealing seat (11) matched with the sealing device (12) is arranged inside the valve body (7), steps are arranged on the inner surface of the sealing seat (11), the steps are arranged on the outer surface of the valve clack (121) and matched with the steps of the sealing seat (11), the elastic pressing sheet (122) abuts against the steps of the sealing seat (11) when stressed, and the sealing seat (11) is in threaded connection with the valve body (7).

3. A right angle stop valve as defined in claim 1, wherein: be equipped with gland nut (8) between valve body (7) and sealed dish (17), gland nut (8) and valve rod (2) threaded connection, leave buffer clearance (10) between valve rod (2) and gland nut (8), be equipped with control pad (9) between gland nut (8) and sealed dish (17).

4. A right angle stop valve as defined in claim 1, wherein: the middle of the valve cover (3) is provided with a packing gland (4), a sealing filler (5) is arranged between the packing gland (4) and the valve cover (3), and the sealing filler (5) is uniformly distributed on the periphery of the valve rod (2).

5. The right angle stop valve of claim 4, wherein: the sealing filler (5) is flexible graphite or oil-immersed hemp.

6. A right angle stop valve as defined in claim 1, wherein: the cross section of the elastic pressing sheet (122) is arc-shaped.

7. A right angle stop valve as defined in claim 1, wherein: the valve clack (121) is made of polyurethane sealant, or fluororubber, or silicon rubber.

8. A right angle stop valve as defined in claim 1, wherein: and wear-resistant alloy layers are sprayed on the surfaces of the valve rod (2), the inner cavity of the valve body (7), the sealing seat (11) and the channel of the sealing seat (11).

9. A right angle stop valve as defined in claim 1, wherein: the top of the valve rod (2) is connected with a hand wheel (1), and the valve body (7), the valve cover (3) and flanges at two ends of the valve body (7) are all made of cast steel.