High-pressure forged steel welding type stop valve

Abstract

The utility model relates to a high-pressure forged steel welding type stop valve. A valve cover is welded on a valve body; a valve rod is arranged in a cavity formed by the valve body and the valve cover; multiple sealing devices are arranged among the valve cover, the valve body and the valve rod and used for sealing gaps among the valve cover, the valve body and the valve rod. Due to the fact that multiple sealing devices are arranged, the technical problems that in an existing high-pressure stop valve, due to the fact that high pressure needs to be borne in a high-pressure use scene, sealing failure of the high-pressure stop valve is often caused, and leakage of the high-pressure stop valve is caused are solved, and the high-pressure forged steel welding type stop valve adapts to the high-pressure use scene.

Description

Technical Field

[0001] The embodiment of the utility model relates to a stop valve, in particular to a high-pressure forged steel welded stop valve. Background Art

[0002] In existing high-pressure stop valves, due to the need to withstand high pressure in high-pressure use scenarios, the seal of the high-pressure stop valve often fails, causing the high-pressure stop valve to leak. Utility Model Content

[0003] The purpose of the embodiments of the utility model is to provide a high-pressure forged steel welded stop valve that can adapt to high-pressure usage scenarios.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the utility model designs a high-pressure forged steel welded stop valve, comprising:

[0005] Valve body;

[0006] A valve cover, welded on the valve body;

[0007] A valve stem, which is arranged in the cavity formed by the valve body and the valve cover;

[0008] A multiple sealing device is provided between the valve cover, the valve body and the valve stem, and is used to seal the gap between the valve cover, the valve body and the valve stem.

[0009] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, a valve disc is movably connected to the top end of the valve stem.

[0010] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, the top end of the valve stem is embedded in the upper part of the valve disc, and the valve stem can rotate in the valve disc.

[0011] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, a through hole is provided on each side of the valve body, an inclined hole is provided on each side of the through hole, and a vertical hole is opened between the two inclined holes.

[0012] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, the multiple sealing device further includes:

[0013] A hard sealing structure, wherein a hard sealing gasket is welded on the vertical hole of the valve body and is in hard contact with the lower part of the valve disc to form the hard sealing structure;

[0014] A gap sealing structure, wherein above the valve disc, the valve stem and the precision through hole provided on the valve body form a gap fit to constitute the gap sealing structure;

[0015] A packing sealing structure is arranged above the valve stem and together with the valve cover.

[0016] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, the packing sealing structure further includes:

[0017] A stuffing box is provided above the valve stem and with the valve cover;

[0018] Filling, the filling being placed in the stuffing box;

[0019] A packing block, wherein the packing block is arranged above the packing;

[0020] A live bolt is used to tighten the two ends of the packing block; one end of the live bolt is movably connected to the valve cover, and a nut is used to fix the packing block above the valve cover.

[0021] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, a valve stem nut is inserted above the valve cover and is threadedly connected to the valve stem, and the valve stem rotates in the valve stem nut.

[0022] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, a hand wheel is fixed at the top of the valve stem by a nut.

[0023] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, a plurality of fixing holes are arranged on both sides of the valve body.

[0024] Furthermore, in the high-pressure forged steel welded stop valve of the utility model, the material of the high-pressure forged steel welded stop valve is ASTM model forged steel.

[0025] Compared with the prior art, the implementation of the utility model adopts a method of welding a valve cover on a valve body; setting a valve stem in a cavity formed by the valve body and the valve cover; and setting multiple sealing devices between the valve cover, the valve body and the valve stem to seal the gap between the valve cover, the valve body and the valve stem. The multiple sealing devices solve the technical problem that in the existing high-pressure stop valve, the seal failure of the high-pressure stop valve is often caused by the need to withstand high pressure in high-pressure use scenarios, resulting in leakage of the high-pressure stop valve, and realizes a high-pressure forged steel welded stop valve suitable for high-pressure use scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0028] The embodiment of the utility model relates to a high-pressure forged steel welded stop valve, such as Figure 1 As shown, including:

[0029] The valve body 1 in this embodiment serves as the base of the high-pressure forged steel welded stop valve in this embodiment;

[0030] The valve cover 4 is welded to the valve body 1; the valve cover 4 and the valve body 1 are welded into one body to form the whole structure;

[0031] A valve stem 3 is arranged in the cavity formed by the valve body 1 and the valve cover 4; the valve stem 3 is used to lift the valve disc 2 and is used for opening and closing the high-pressure forged steel welded stop valve in this embodiment;

[0032] A multiple sealing device 100 is provided between the valve cover 4 and the valve body 1 and the valve stem 3, and is used to seal the gap between the valve cover 4 and the valve body 1 and the valve stem 3. The multiple sealing device 100 is used for sealing between the valve cover 4 and the valve body 1 and the valve stem 3, which solves the technical problem that in the existing high-pressure stop valve, the seal of the high-pressure stop valve often fails due to the need to withstand high pressure in high-pressure use scenarios, causing leakage of the high-pressure stop valve, and realizes a high-pressure forged steel welded stop valve suitable for high-pressure use scenarios.

[0033] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, the valve disc 2 is movably connected to the top of the valve stem 3. The valve stem 3 is used to lift the valve disc 2.

[0034] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, the top of the valve stem 3 is embedded in the upper part of the valve disc 2, and the valve stem 3 can rotate in the valve disc 2. In such a structure, when the valve stem 3 rotates, the valve disc 2 will not be driven to rotate, so that the valve stem 3 can drive the valve disc 2 to rise and fall.

[0035] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1As shown, a through hole 15 is provided on each side of the valve body 1, an inclined hole 16 is provided on each side of the through hole 15, and a vertical hole 17 is opened between the two inclined holes 16. The through hole 15, the inclined hole 16 and the vertical hole 17 are provided on the valve body 1 to form a channel structure of the valve body 1.

[0036] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, the multiple sealing device 100 further includes:

[0037] A hard sealing structure 20 is formed by welding a hard sealing gasket 18 on the vertical hole 17 of the valve body 1 to make hard contact with the lower part of the valve disc 2 to form a hard sealing structure 20;

[0038] The gap sealing structure 30 is formed above the valve disc 2, and the valve stem 3 and the precision through hole 19 provided on the valve body 1 form a gap fit to form the gap sealing structure 30;

[0039] A packing seal structure 40 is provided above the valve stem 3 and with the valve cover 4 .

[0040] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, the packing seal structure 40 further includes:

[0041] A stuffing box 8 is arranged above the valve stem 3 and the valve cover 4;

[0042] Put the packing 5 in the stuffing box 8; Put the packing 5 in the stuffing box 8,

[0043] A packing pressing block 7 is arranged above the packing 5; the packing pressing block 7 is pressed on the packing 5 to compress the packing 5;

[0044] The two ends of the packing block 7 are compressed with the swing bolts 9; one end of the swing bolt 9 is movably connected to the valve cover 4, and the packing block 7 is fixed with the nut 10 above the valve cover 4. The swing bolts 9 and the nuts 10 fix the packing block 7.

[0045] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, a stem nut 11 is inserted above the valve cover 4 and is threadedly connected to the valve stem 3, and the valve stem 3 rotates in the stem nut 11. The valve stem 3 rotates in the stem nut 11 to lift the valve disc 2, and the high-pressure forged steel welded stop valve in this embodiment is switched.

[0046] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, at the top of the valve stem 3, a hand wheel 12 is fixed by a nut. The hand wheel 12 is used to rotate the hand wheel 12.

[0047] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, a plurality of fixing holes 14 are provided on both sides of the valve body 1 for fixing the high-pressure forged steel welded stop valve in this embodiment.

[0048] In order to achieve the above technical effects, the high pressure forged steel welded stop valve in this embodiment is as follows: Figure 1 As shown, the material of the high-pressure forged steel welded stop valve is ASTM model forged steel.

[0049] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A high-pressure forged steel welded stop valve, characterized in that: include: Valve body; A valve cover, welded on the valve body; A valve stem, which is arranged in the cavity formed by the valve body and the valve cover; A multiple sealing device is provided between the valve cover and the valve body and the valve stem, and is used to seal the gap between the valve cover and the valve body and the valve stem; The multiple sealing device further comprises: A hard sealing structure, wherein a hard sealing gasket is welded on the vertical hole of the valve body and is in hard contact with the lower part of the valve disc to form the hard sealing structure; A gap sealing structure, wherein above the valve disc, the valve stem and the precision through hole provided on the valve body form a gap fit to constitute the gap sealing structure; A packing sealing structure is provided above the valve stem and with the valve cover; The packing seal structure further comprises: A stuffing box is provided above the valve stem and with the valve cover; Filling, the filling being placed in the stuffing box; A packing block, wherein the packing block is arranged above the packing; A live bolt is used to tighten the two ends of the packing block; one end of the live bolt is movably connected to the valve cover, and a nut is used to fix the packing block above the valve cover.

2. The high-pressure forged steel welded stop valve according to claim 1, characterized in that: A valve disc is movably connected to the top end of the valve stem.

3. The high-pressure forged steel welded stop valve according to claim 2, characterized in that: The top end of the valve stem is embedded in the upper part of the valve disc, and the valve stem can rotate inside the valve disc.

4. The high-pressure forged steel welded stop valve according to claim 1, characterized in that: A through hole is respectively arranged on both sides of the valve body, an inclined hole is respectively arranged on both sides of the through hole, and a vertical hole is opened between the two inclined holes.

5. The high pressure forged steel welded stop valve according to claim 1, characterized in that: A valve stem nut is inserted above the valve cover and threadedly connected with the valve stem. The valve stem rotates in the valve stem nut.

6. The high pressure forged steel welded stop valve according to claim 5, characterized in that: A hand wheel is fixed on the top of the valve stem by a nut.

7. The high-pressure forged steel welded stop valve according to claim 1, characterized in that: A plurality of fixing holes are arranged on both sides of the valve body.

8. The high pressure forged steel welded stop valve according to any one of claims 1 to 7, characterized in that: The material of the high-pressure forged steel welded stop valve is ASTM model forged steel.

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