High-pressure valve

Abstract

A high-pressure valve relates to the technical field of valves. The valve body is provided with a bypass channel between the water inlet channel and the valve seat, the bypass channel is provided with an auxiliary valve hole, the bottom of the auxiliary valve hole is communicated with the water inlet channel, a bottom outlet of the auxiliary valve hole is a conical hole, a conical head is installed in the auxiliary valve hole, the conical head and the conical hole are in taper sealing, one side of the valve rod is fixedly connected with a cross arm, and the cross arm is located on the upper side of the auxiliary valve hole. The lower side of the cross arm is fixedly connected with a compression spring, the lower part of which is fixedly connected with a conical head. The stop valve has the advantages that the bypass channel is additionally arranged on the basis of the structure of a conventional stop valve, when the stop valve is closed, one side of the water outlet channel is closed through the valve rod, the valve rod drives the cross arm to descend, the cross arm presses the compression spring and the conical head to descend, the conical head falls on the conical hole to be sealed, and the bypass channel and the water inlet channel are closed; and at the moment, the filler part does not bear high pressure, so that the service life of the filler is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially, it relates to a high pressure valve. BACKGROUND

[0002] The high pressure valve is suitable for the pipeline of high pressure water, steam, oil product, superheated steam in thermal power plant, petroleum chemical industry, metallurgy etc., cuts off or connects medium, the stem of high pressure valve is all through the packing seal, the valve stem of high pressure stop valve is the plug shaped valve seat, the sealing surface cone surface, cuts off the valve seat up and down, the packing seal in high pressure stop valve still bears the pressure of upside passage after the valve is closed, and the service life of packing is low. SUMMARY

[0003] In order to solve the problem that the service life of packing seal of current high pressure stop valve is low, the utility model provides a high pressure valve.

[0004] The utility model discloses a technical scheme is: a high pressure valve, including valve body and valve stem, the water inlet channel is equipped with the water outlet channel in valve body, the water outlet channel bottom is installed with valve seat, and the water inlet channel and water outlet channel are cut off by the valve stem falling on the valve seat, and the upper portion of valve body is connected valve bonnet through bolt, sealing ring, and the packing is installed in valve bonnet, and the upper portion of valve bonnet is connected sealing cover through bolt, and sealing cover is pressed on packing, and sealing cover is connected valve stem with screw thread, and the top fixed connection hand wheel of valve stem is;

[0005] The valve body is equipped with bypass channel between water inlet channel and valve seat, and bypass channel is communicated with water inlet channel and water outlet channel, and bypass channel is equipped with auxiliary valve hole, and the bottom of auxiliary valve hole is communicated with water inlet channel, and the bottom outlet of auxiliary valve hole is conical hole, and conical head is installed in auxiliary valve hole, and the taper seal between conical head and conical hole, and the lateral fixed connection of valve stem has horizontal arm, and horizontal arm is located on the upside of auxiliary valve hole, and the lower side fixed connection compression spring of horizontal arm, and the lower part fixed connection conical head of compression spring.

[0006] When the valve stem falls on the valve seat and seals, the horizontal arm presses compression spring and conical head down, and the conical head falls on the conical hole and seals, when the valve stem rises, the conical head leaves the conical hole.

[0007] The utility model has the advantages that: through increasing bypass channel on the structure of conventional stop valve, when the stop valve is closed, the valve stem closes one side of water outlet channel, the valve stem drives horizontal arm to descend, the horizontal arm presses compression spring and conical head down, and the conical head falls on the conical hole and seals, and the bypass channel and water inlet channel are closed, so that the water inlet channel is also closed, at this moment, the packing part does not bear high pressure, and the service life of packing is improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] The Fig. 1 It is the structural schematic diagram of the utility model, and the valve body is equipped with bypass channel between water inlet channel and valve seat, and bypass channel is communicated with water inlet channel and water outlet channel, and bypass channel is equipped with auxiliary valve hole, and the bottom of auxiliary valve hole is communicated with water inlet channel, and the bottom outlet of auxiliary valve hole is conical hole, and conical head is installed in auxiliary valve hole, and the taper seal between conical head and conical hole, and the lateral fixed connection of valve stem has horizontal arm, and horizontal arm is located on the upside of auxiliary valve hole, and the lower side fixed connection compression spring of horizontal arm, and the lower part fixed connection conical head of compression spring.

[0009] TheFig. 2 is the structural schematic diagram of the valve body in the utility model.

[0010] Fig. 1 - valve body, 2 - valve cover, 3 - valve stem, 4 - sealing cover, 5 - packing, 6 - hand wheel, 7 - water inlet channel, 8 - water outlet channel, 9 - valve seat, 10 - bypass channel, 11 - auxiliary valve hole, 12 - conical hole, 13 - cross arm, 14 - conical head, 15 - compression spring. DETAILED DESCRIPTION

[0011] As Figs. 1-2 shown, a high-pressure valve, including valve body 1 and valve stem 3, water inlet channel 7, water outlet channel 8 are equipped in valve body 1, valve seat 9 is installed at the bottom of water outlet channel 8, valve stem 3 falls on valve seat 9 to cut off water inlet channel 7 and water outlet channel 8, valve cover 2 is connected on the upper part of valve body 1 through bolt and sealing ring, packing 5 is installed in valve cover 2, sealing cover 4 is connected on the upper part of valve cover 2 through bolt, sealing cover 4 is pressed on packing 5, sealing cover 4 is threadedly connected with valve stem 3, hand wheel 6 is fixedly connected on the top of valve stem 3, the above is the conventional structure of stop valve;

[0012] Bypass channel 10 is equipped between water inlet channel 7 and valve seat 9 of valve body 1, bypass channel 10 is communicated with water inlet channel 7 and water outlet channel 8, auxiliary valve hole 11 is equipped in bypass channel 10, the bottom of auxiliary valve hole 11 is communicated with water inlet channel 7, the bottom outlet of auxiliary valve hole 11 is conical hole 12, conical head 14 is installed in auxiliary valve hole 11, the taper between conical head 14 and conical hole 12 is sealed, cross arm 13 is fixedly connected on one side of valve stem 3, cross arm 13 is located on the upper side of auxiliary valve hole 11, compression spring 15 is fixedly connected on the lower side of cross arm 13, conical head 14 is fixedly connected on the lower part of compression spring 15.

[0013] When valve stem 3 falls on valve seat 9 to seal, cross arm 13 presses compression spring 15 and conical head 14 to descend, conical head 14 falls on conical hole 12 to seal; when valve stem 3 rises, conical head 14 leaves conical hole 12.

[0014] Through increasing bypass channel 10 on the structure of conventional stop valve, when the stop valve is closed, valve stem 3 closes one side of water outlet channel 8, valve stem 3 drives cross arm 13 to descend, cross arm 13 presses compression spring 15 and conical head 14 to descend, conical head 14 falls on conical hole 12 to seal, closes bypass channel 10 and water inlet channel 7, thereby also closes water inlet channel 7, at this time, the part of packing 5 does not bear high pressure, the service life of packing 5 is improved.

Claims

1. A high pressure valve comprising a valve body (1) and a valve stem (3), characterized in that: The valve body (1) is provided with an inlet channel (7) and an outlet channel (8), the bottom of the outlet channel (8) is provided with a valve seat (9), the valve stem (3) falls on the valve seat (9) to cut off the inlet channel (7) and the outlet channel (8), the upper part of the valve body (1) is connected with the valve cover (2) through bolts and sealing rings, the valve cover (2) is provided with a packing (5), the upper part of the valve cover (2) is connected with the sealing cover (4) through bolts, the sealing cover (4) is pressed on the packing (5), the sealing cover (4) is threadedly connected with the valve stem (3), and the top of the valve stem (3) is fixedly connected with the hand wheel (6); The valve body (1) is provided with a bypass channel (10) between the inlet channel (7) and the valve seat (9), the bypass channel (10) is communicated with the inlet channel (7) and the outlet channel (8), the bypass channel (10) is provided with a secondary valve hole (11), the bottom of the secondary valve hole (11) is communicated with the inlet channel (7), the bottom outlet of the secondary valve hole (11) is a conical hole (12), the secondary valve hole (11) is provided with a conical head (14), the conical head (14) is sealed with the conical hole (12) through tapering, one side of the valve stem (3) is fixedly connected with a cross arm (13), the cross arm (13) is located on the upper side of the secondary valve hole (11), the lower side of the cross arm (13) is fixedly connected with a compression spring (15), and the lower part of the compression spring (15) is fixedly connected with the conical head (14).

2. A high pressure valve according to claim 1, characterized in that: When the valve stem (3) falls on the valve seat (9) to seal, the cross arm (13) presses the compression spring (15) and the conical head (14) to descend, and the conical head (14) falls on the conical hole (12) to seal; when the valve stem (3) rises, the conical head (14) is separated from the conical hole (12).

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