CN111379899A - Right Angle Globe Valve - Google Patents

Abstract

A right-angle stop valve includes a valve body, a valve cover, a valve stem, and a sealing device. The valve cover is mounted on the valve body. A sealing disc is mounted on one end of the valve stem, and a sealing device is provided on the sealing disc. The sealing device includes a valve disc with a cavity inside. An elastic pressure plate is provided inside the cavity, and a connecting block is provided in the middle of the elastic pressure plate. The connecting block is connected to a movable rod. The end of the movable rod passes through the valve disc and the sealing disc and abuts against the end of the valve stem. The valve is pressed together by the expansion and contraction of the elastic pressure plate, thus achieving a sealing function. The valve has advantages such as simple structure, high strength, wear resistance, low leakage, and long service life.

Description

Right Angle Globe Valve

technical field

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

Background technique

The opening and closing part of the angle type globe valve is a plug-shaped sealing device. The sealing surface is a plane or a conical surface. The sealing device moves linearly along the center line of the fluid. There is also a lifting and rotating rod type (the handwheel rotates and lifts together with the valve stem, and the nut is set on the valve body). Angle globe valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the sealing device to force the sealing surface not to leak. At present, the existing globe valves are generally of ordinary cock type or flat plug type structure, and the material is mainly cast iron. The existing right-angle globe valves usually have complex valve structure, low strength, poor wear resistance, easy leakage and short service life. and other shortcomings. Due to the limited processing capacity of the existing cast steel globe valve, its structure is relatively simple, which affects the sealing, and the replacement of the wearing parts of the globe valve is not convenient enough.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a right-angle stop valve, which solves the disadvantages of the existing right-angle stop valve, such as complex valve structure, low strength, poor wear resistance, easy leakage, and short service life.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a right-angle globe valve, comprising a valve body, a valve cover, a valve stem and a sealing device, the valve cover is installed on the valve body, and one end of the valve stem is equipped with a valve body. The sealing disc is provided with a sealing device, the sealing device comprises a valve flap, a cavity is arranged inside the valve flap, an elastic pressing sheet is arranged inside the cavity, and a connecting block is arranged in the middle of the elastic pressing sheet, and the connecting block is connected to the movable plate. The rod is connected, and the end of the movable rod passes through the valve disc and the sealing disc and abuts against the end of the valve rod.

In a preferred solution, the inside of the valve body is provided with a sealing seat matching the sealing device, the inner surface of the sealing seat is provided with steps, the outer surface of the valve flap is provided with steps to match the steps of the sealing seat, and the elastic pressure The sheet abuts on the step of the sealing seat when it is stressed, and the sealing seat is threadedly connected with the valve body.

In a preferred solution, a compression nut is provided between the valve body and the sealing disc, the compression nut and the valve stem are threadedly connected, a buffer gap is left between the valve stem and the compression nut, and the compression nut and the sealing There are control pads between the discs.

In a preferred solution, a packing gland is arranged in the middle of the valve cover, a sealing packing is arranged between the packing gland and the valve cover, and the sealing packing is evenly distributed on the periphery of the valve stem.

In a preferred solution, the sealing filler is flexible graphite or oil-impregnated hemp.

In a preferred solution, the cross-section of the elastic pressing sheet is arc-shaped.

In a preferred solution, the material of the valve flap is polyurethane sealant, or fluorine rubber, or silicone rubber.

In a preferred solution, a wear-resistant alloy layer is sprayed on the surfaces of the valve stem, the inner cavity of the valve body, the sealing seat and the channel of the sealing seat.

In a preferred solution, a hand wheel is connected to the top of the valve stem, and the valve body, the valve cover and the flanges at both ends of the valve body are all made of cast steel.

The present invention provides a right-angle stop valve. The end of the valve stem is provided with a sealing disc, and a sealing device is installed on the sealing disc. The sealing device comprises a valve flap, and an elastic pressing sheet is arranged in the cavity inside the valve flap When the valve is closed, the sealing disc goes down, the valve disc reaches the inside of the sealing seat, the step on the outer surface of the valve disc abuts against the step on the inner surface of the sealing seat, and the valve disc stops moving , At this time, the valve stem continues downward, and the movable rod under the end of the valve stem is mortgaged by the end of the valve stem, and the movable rod transmits the force to the elastic pressing piece, which is deformed by force, squeezed to both sides, and then subjected to The step limit of the sealing seat, at this time, the sealing effect of the disc and the sealing seat is getting better and better, which solves the shortcomings of the general right-angle globe valve, such as low strength, poor wear resistance, easy leakage, and short service life.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

Fig. 1 is the structure diagram of the present invention;

Fig. 2 is the enlarged view of the present invention A;

Fig. 3 is the structure diagram of the sealing device of the present invention;

In the figure: handwheel 1; valve stem 2; valve cover 3; packing gland 4; sealing packing 5; stud bolt 6; valve body 7; compression nut 8; control pad 9; buffer gap 10; sealing seat 11; Sealing device 12; valve flap 121; elastic pressing sheet 122; connecting block 123; sealant 124; movable rod 125; handwheel nut 13; gland nut 14; gland bolt 15;

Detailed ways

As shown in Figures 1 to 3, a right-angle globe valve includes a valve body 7, a valve cover 3, a valve stem 2 and a sealing device 12. The valve cover 3 is installed on the valve body 7, and one end of the valve stem 2 is equipped with The sealing disc 17 is provided with a sealing device 12. The sealing device 12 includes a valve flap 121. The valve flap 121 is provided with a cavity inside, and an elastic pressing sheet 122 is arranged inside the cavity. There is a connecting block 123, the connecting block 123 is connected with the movable rod 125, and the end of the movable rod 125 passes through the valve disc 121 and the sealing disc 17 and abuts against the end of the valve rod 2. With this structure, when the valve rod 2 moves downwards , the valve flap 121 moves downward. When the valve flap 121 receives resistance, the valve flap 121 stops downward. At this time, the valve stem 2 continues downward, and the end of the valve stem 2 mortgages the movable rod 125, and the movable rod 125 transmits the pressure. The elastic pressing sheet 122 is given, and the elastic pressing sheet 122 is stretched around to play the role of pressing and sealing.

In a preferred solution, the valve body 7 is provided with a sealing seat 11 matching the sealing device 12 , the inner surface of the sealing seat 11 is provided with steps, and the outer surface of the valve flap 121 is provided with steps corresponding to the steps of the sealing seat 11 . Matching, the elastic pressing sheet 122 abuts on the step of the sealing seat 11 when it is stressed, and the sealing seat 11 is threadedly connected with the valve body 7. This structure plays a limiting role on the valve flap 121 of the sealing device 12 and seals the The seat 11 is threadedly connected with the valve body 7, which is convenient for replacement and maintenance.

In a preferred solution, a compression nut 8 is provided between the valve body 7 and the sealing disc 17 , the compression nut 8 is threadedly connected with the valve stem 2 , and a buffer gap 10 is left between the valve stem 2 and the compression nut 8 , a control pad 9 is arranged between the compression nut 8 and the sealing disc 17, the sealing disc 17 is fixed on the valve stem 2, and a buffer gap 10 is left between the valve stem 2 and the compression nut 8, and when it is raised When the valve rod 2 is used, the movable rod 125 inside the sealing device 12 can be rebounded, and the valve can be opened more concisely.

In a preferred solution, a packing gland 4 is arranged in the middle of the valve cover 3, a sealing packing 5 is arranged between the packing gland 4 and the valve cover 3, and the sealing packing 5 is evenly distributed on the circumference of the valve stem 2 to play a sealing role , but also convenient for maintenance and maintenance.

In the preferred solution, the sealing packing 5 is flexible graphite or oil-impregnated hemp, and different materials are used in different transportation environments. When the transportation medium is fresh water, seawater and lubricating oil, oil-impregnated hemp is used; when it is fuel oil and steam Flexible graphite.

In a preferred solution, the elastic pressing sheet 122 has an arc-shaped cross-section, which can play the role of pressing and rebounding.

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

In a preferred solution, a wear-resistant alloy layer is sprayed on the surfaces of the valve stem 2, the inner cavity of the valve body 7, the sealing seat 11 and the channel of the sealing seat 11, which can play a wear-resistant role.

In a preferred solution, a handwheel 1 is connected to the top of the valve stem 2, and the valve body 7, the valve cover 3 and the flanges at both ends of the valve body 7 are all made of cast steel, which solves the problem of processing cast steel. The valve can be produced by cast steel after the problem of low precision.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present invention should be based on the technical solutions recorded in the claims, including the equivalents of the technical features in the technical solutions recorded in the claims. The alternative is protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention.

Claims (9)

1. A right-angle globe valve, comprising a valve body (7), a valve cover (3), a valve stem (2) and a sealing device (12), the valve cover (3) being mounted on the valve body (7), and characterized in that : One end of the valve stem (2) is provided with a sealing disc (17), and a sealing device (12) is arranged on the sealing disc (17), and the sealing device (12) includes a valve flap (121), a valve flap (121) ) is provided with a cavity inside, an elastic pressing piece (122) is arranged inside the cavity, and a connecting block (123) is arranged in the middle of the elastic pressing piece (122), and the connecting block (123) is connected with the movable rod (125), and the movable rod The end of (125) passes through the valve disc (121) and the sealing disc (17) abuts against the end of the valve stem (2). 2. A right-angle globe valve according to claim 1, characterized in that: the valve body (7) is provided with a sealing seat (11) matching the sealing device (12) inside, and the inner surface of the sealing seat (11) Steps are provided on the outer surface of the valve flap (121) to match the steps of the sealing seat (11), and the elastic pressing sheet (122) abuts on the steps of the sealing seat (11) when under force , the sealing seat (11) is threadedly connected with the valve body (7). 3. A right-angle globe valve according to claim 1, characterized in that: a compression nut (8) is provided between the valve body (7) and the sealing disc (17), and the compression nut (8) is connected to the valve The rod (2) is threadedly connected, a buffer gap (10) is left between the valve rod (2) and the compression nut (8), and a control is provided between the compression nut (8) and the sealing disc (17). pad (9). 4. A right-angle globe valve according to claim 1, characterized in that: a packing gland (4) is arranged in the middle of the valve cover (3), and a packing gland (4) and the valve cover (3) are arranged between the packing gland (4) and the valve cover (3). There is a sealing packing (5), and the sealing packing (5) is evenly distributed on the circumference of the valve stem (2). 5 . The right-angle globe valve according to claim 4 , wherein the sealing packing ( 5 ) is flexible graphite or oil-impregnated hemp. 6 . 6 . The right-angle globe valve according to claim 1 , wherein the elastic pressing piece ( 122 ) has an arc-shaped cross-section. 7 . 7 . The right-angle globe valve according to claim 1 , wherein the valve flap ( 121 ) is made of polyurethane sealant, or fluorine rubber, or silicon rubber. 8 . 8. A right-angle globe valve according to claim 1, characterized in that: the valve stem (2), the inner cavity of the valve body (7), the sealing seat (11) and the channel surface of the sealing seat (11) are sprayed with Wear-resistant alloy layer. 9. A right-angle globe valve according to claim 1, characterized in that: the top of the valve stem (2) is connected with a handwheel (1), the valve body (7), the valve cover (3) and the valve The flanges at both ends of the body (7) are made of cast steel.

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