CN213745012U

CN213745012U - Sealing plug valve

Info

Publication number: CN213745012U
Application number: CN202021709215.8U
Authority: CN
Inventors: 魏军; 徐俊; 范光辉; 徐乾程
Original assignee: YANGZHOU CHICHENG PETROLEUM MACHINERY CO Ltd
Current assignee: YANGZHOU CHICHENG PETROLEUM MACHINERY CO Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-07-20
Anticipated expiration: 2030-08-14

Abstract

A sealing plug valve is characterized by comprising a valve body, wherein an upper valve seat is arranged at the upper part of the valve body, a lower valve seat is arranged at the lower part of the valve body, a valve core is embedded in the upper valve seat and the lower valve seat, a channel is arranged on the valve core, a first sealing ring is arranged at the upper end of the valve core, a second sealing ring is arranged below the valve core, a barrel is arranged on the upper valve seat upwards, a filler is arranged between the barrel and the valve core, and a material pressing block is arranged above the filler; a groove is formed in the top of the cylinder body, a fixing lug is arranged in the groove, the fixing lug is perpendicular to the side wall of the cylinder body and penetrates out of the groove, a return spring is arranged between the fixing lug and the groove, and a cover plate is arranged above the groove; the cylinder body is provided with a screw cap. The utility model discloses a first sealing washer and second sealing washer for the case is sealed well with last disk seat and down between the disk seat, through the dual fastness of having guaranteed the valve of nut and fixed lug.

Description

Sealing plug valve

Technical Field

The utility model relates to a plug valve technical field especially relates to a sealed plug valve.

Background

The plug valve is a rotary valve in a closing part or a plunger shape, and the opening or the closing of the valve is realized by rotating 90 degrees to ensure that a passage port on the plug is the same as or separated from a passage port on the valve body. The plug valve is widely applied to oil field exploitation, transportation and refining equipment, and is also widely applied to petrochemical industry, chemical industry, coal gas, natural gas, liquefied petroleum gas, heating and ventilation industry and general industry.

Taper sealing is mostly adopted between the valve seat and the valve core of the plug valve, the processing requirement is high, the procedure is complex, the cost is high, and leakage is easy to leak. In the prior art, external parts are matched for sealing, so that the sealing effect is improved. Such as a sealing tap valve of patent No. CN 2014205935877. The patent realizes the beneficial effects of reducing cost and reducing working procedures. But the long-term use and the multiple replacement of the sealing ring can lead to the reduction of the fixing effect between the nut and the upper valve seat.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects of the prior art and providing a sealing plug valve.

A sealing plug valve is characterized by comprising a valve body, wherein an upper valve seat is arranged at the upper part of the valve body, a lower valve seat is arranged at the lower part of the valve body, a valve core is embedded in the upper valve seat and the lower valve seat, a channel is arranged on the valve core, a first sealing ring is arranged at the upper end of the valve core, a second sealing ring is arranged below the valve core, a barrel is arranged on the upper valve seat upwards, a filler is arranged between the barrel and the valve core, and a material pressing block is arranged above the filler;

a groove is formed in the top of the cylinder body, a fixing lug is arranged in the groove, the fixing lug is perpendicular to the side wall of the cylinder body and penetrates out of the groove, a return spring is arranged between the fixing lug and the groove, and a cover plate is arranged above the groove;

the cylinder body is provided with a screw cap.

Preferably, the small end of the cone is matched with the inner wall of the lower valve seat, and the large end of the cone is matched with the inner wall of the upper valve seat.

Preferably, the big end top of cone is equipped with pole portion, the pole portion top is equipped with the dwang, the dwang diameter is less than the little end diameter of cone.

Preferably, the nut top is equipped with annular lug, the nut has cup jointed the clamping ring, the nut side is equipped with the fixed orifices, the fixed orifices diameter is greater than fixed lug diameter.

Preferably, the fixed lug, the groove, the cover plate and the return spring are in one group and at least two groups are arranged, the distance between each group is equal, and the outer end of the fixed lug is a hemisphere.

The utility model has the advantages that:

a first sealing ring is arranged at the upper end of the cone of the valve core, and a second sealing ring is arranged at the lower end of the cone, so that high sealing is formed between the valve core and the upper valve seat and between the valve core and the lower valve seat; the nut is arranged on the barrel, so that the inner valve core and the filler are effectively fixed by the material pressing block, and the fixing lug penetrates out of the nut, so that the firmness of the plug valve is further improved; the pressing ring and the nut are matched for use, the nut is rapidly disassembled, and the sealing ring is replaced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the description of embodiments of the invention, and are not intended to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of circle A in FIG. 1;

labeled as: 1-valve body, 2-valve core, 3-filler, 4-lower valve seat, 5-upper valve seat, 6-cylinder, 7-flange, 8-cone, 9-rod, 10-first sealing ring, 11-second sealing ring, 12-channel, 13-rotating rod, 14-pressing block, 15-nut, 16-groove, 17-cover plate, 18-reset spring, 19-fixed lug and 20-pressing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

According to the figures 1 and 2, the sealing plug valve comprises a valve body 1, wherein an upper valve seat 5 is arranged at the upper part of the valve body 1, a lower valve seat 4 is arranged at the lower part of the valve body 1, a valve core 2 is embedded in the upper valve seat 5 and the lower valve seat 4, a channel 12 is arranged on the valve core 2, a first sealing ring 10 is arranged at the upper end of the valve core 2, a second sealing ring 11 is arranged below the valve core 2, a cylinder body 6 is upwards arranged on the upper valve seat 5, a filler 3 is arranged between the cylinder body 6 and the valve core 2, and a material pressing block 14 is arranged above the filler;

a groove 16 is formed in the top of the cylinder 6, a fixing lug 19 is arranged in the groove 16, the fixing lug 19 is perpendicular to the side wall of the cylinder 6 and penetrates out of the groove, a return spring 18 is arranged between the fixing lug 19 and the groove 16, and a cover plate 17 is arranged above the groove 16;

the cylinder 6 is provided with a screw cap 15. The valve core 2 is a cone 8, and the top of the big end of the cone 8 is provided with a rotating rod 13. The top end of the nut 15 is provided with an annular convex block, and the nut 15 is sleeved with a press ring 20. The top of the big end of the cone 8 is provided with a rod part 9, and the top of the rod part 9 is provided with a rotating rod 13.

The working principle is as follows: the two sides of the valve body are connected with a pipeline through flanges 7, a fixing lug 19 and a return spring 18 are placed in a groove 16 of the upper valve seat 5, and a cover plate 17 is rotated to be screwed tightly. A first sealing ring 10 and a second sealing ring 11 are arranged on the cone 8 of the valve core 2, and the cone 8 is placed into the lower valve seat 4 and the upper valve seat 5 from the cylinder 6. A charge 3 is placed between the barrel 6 and the stem 9, and a slug 14 is placed on the charge 3 within the barrel 6. The nut 15 is put on and the fixing lug 19 is plugged into the groove 16, the nut 15 is rotated until the fixing hole on the nut 15 is aligned with the fixing lug 19, the return spring 18 ejects the fixing lug 19 out to fix the nut 15.

When the fixing lug 19 is detached and replaced, the fixing lug 19 is pressed in through the pressing ring 20, the fixing lug 19 is further plugged into the groove 16 by rotating the screw cap 15, and then the fixing lug can be detached.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing plug valve is characterized by comprising a valve body, wherein an upper valve seat is arranged at the upper part of the valve body, a lower valve seat is arranged at the lower part of the valve body, a valve core is embedded in the upper valve seat and the lower valve seat, a channel is arranged on the valve core, a first sealing ring is arranged at the upper end of the valve core, a second sealing ring is arranged below the valve core, a barrel is arranged on the upper valve seat upwards, a filler is arranged between the barrel and the valve core, and a material pressing block is arranged above the filler;

the cylinder body is provided with a screw cap.

2. The sealing plug valve of claim 1, wherein the plug body is a cone, a small end of the cone is engaged with the inner wall of the lower valve seat, and a large end of the cone is engaged with the inner wall of the upper valve seat.

3. The sealing plug valve of claim 2, wherein a rod is arranged at the top of the large end of the cone, a rotating rod is arranged at the top of the rod, and the diameter of the rotating rod is smaller than that of the small end of the cone.

4. The sealing plug valve of claim 1, wherein the top end of the nut is provided with an annular projection, the nut is sleeved with a compression ring, the side surface of the nut is provided with a fixing hole, and the diameter of the fixing hole is larger than that of the fixing projection.

5. The sealing plug valve of claim 1, wherein the fixing lug, the groove, the cover plate and the return spring are in one group and at least two groups, the distance between each group is equal, and the outer end of the fixing lug is a hemisphere.