CN214889014U

CN214889014U - Composite sealing fireproof welding ball valve

Info

Publication number: CN214889014U
Application number: CN202121032613.5U
Authority: CN
Inventors: 杨林鹏; 裴凡; 夏军强; 吴利平
Original assignee: Zhengzhou Zhongli Pump & Valve Manufacturing Co ltd
Current assignee: Zhengzhou Zhongli Pump & Valve Manufacturing Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-11-26
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a composite sealing fireproof welding ball valve, which relates to the technical field of valve equipment and comprises a valve body and a valve cover, wherein the valve body and the valve cover are welded together, a spherical valve core is arranged in the valve body, a valve rod is fixedly connected right above the spherical valve core, a hand wheel is arranged on the outer side of the valve cover, the valve rod and the hand wheel are in power connection, a first sealing element is arranged at the contact part of the spherical valve core and the valve body, a second sealing element is arranged at the contact part of the valve rod and the valve cover, a sealing oil chamber is arranged between the valve rod and the valve cover, the sealing oil chamber is filled with sealing grease, a third sealing element is arranged between the valve rod and the valve cover, the first sealing element is a rubber ring, the upper end and the lower end of the valve core are respectively provided with one first sealing element, the second sealing element is a graphite ring, and the third sealing element is a polytetrafluoroethylene sealing ring, the utility model is used for the pipeline transportation of natural gas, crude oil, the leakproofness is strong, can prevent that the medium from leaking and arousing the blasting accident.

Description

Composite sealing fireproof welding ball valve

Technical Field

The utility model relates to a valve equipment technical field, concretely relates to combined seal fire prevention welding ball valve.

Background

The welded ball valve is widely used in various fields, the superior quality and the high-performance stability of the welded ball valve cannot be achieved by a common cast steel ball valve, and the service life of the welded ball valve is far longer than that of the cast steel ball valve, so that the welded ball valve is widely applied to various pipeline equipment such as urban gas, urban heat supply, petrochemical industry, shipbuilding, steel, pressure regulating stations, power plants and the like.

The welded ball valve has the advantages of long service life and the like, and is commonly used for conveying inflammable and explosive media such as crude oil, natural gas and the like, so higher requirements are provided for the sealing property and the fireproof and explosion-proof performance of the welded ball valve, and the fireproof and explosion-proof performance of most welded ball valves cannot meet the requirements for conveying the inflammable and explosive media.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a compound sealing fire prevention welding ball valve has good sealing performance and fire prevention explosion-proof performance to solve the problem that the welding ball valve leakproofness is not enough among the prior art, fire prevention explosion-proof ability is weak.

The utility model adopts the technical scheme as follows:

the utility model provides a combined seal fire prevention welding ball valve, includes valve body, valve gap, valve body, valve gap welding are in the same place, be equipped with spherical case in the valve body, fixedly connected with valve rod directly over the spherical case, the valve gap outside is equipped with the hand wheel, valve rod, hand wheel power are connected, the contact site of spherical case, valve body is equipped with first sealing member, the contact site of valve rod, valve gap is equipped with the second sealing member, be equipped with sealed grease chamber between valve rod, the valve gap, use sealed grease to fill in the sealed grease chamber.

Preferably, a third sealing member is provided between the valve rod and the valve cover, and the third sealing member is provided one on each of the upper and lower sides of the sealed oil chamber.

Preferably, the top end of the valve rod is provided with a helical gear, a screw rod is arranged at the rotating shaft of the hand wheel, a sleeve is arranged on the side face of the valve cover, the screw rod rotates in the sleeve, and the screw rod and the helical gear are meshed.

Preferably, the first sealing element is a rubber ring, and the upper end and the lower end of the valve core are respectively provided with one first sealing element.

Preferably, the second seal is a graphite ring.

Preferably, the third seal is a polytetrafluoroethylene seal ring.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

(1) a plurality of groups of sealing elements are arranged among the valve core, the valve rod and the valve body, the sealing performance of the ball valve is improved in a multi-sealing mode, and combustible liquid such as crude oil can be effectively prevented from leaking;

(2) the third sealing elements made of polytetrafluoroethylene are arranged on the upper side and the lower side of the sealing oil chamber, sealing grease can be prevented from leaking from a gap at the lower end or the upper end of the sealing oil chamber, and the sealing performance of the sealing oil chamber is ensured.

Drawings

Fig. 1 is a front view structure diagram of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a plan view of the helical gear and the screw.

The labels in the figure are: 1-valve body, 2-valve cover, 3-spherical valve core, 4-valve rod, 5-hand wheel, 6-first sealing element, 7-second sealing element, 8-sealing oil chamber, 9-third sealing element, 10-helical gear, 11-screw rod and 12-sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the present invention is made with reference to the accompanying drawings and examples, and it should be understood that the specific examples described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Example 1

As shown in fig. 1-3, a composite sealing fireproof welding ball valve comprises a valve body 1 and a valve cover 2, wherein the valve body 1 and the valve cover 2 are welded together, a spherical valve core 3 is arranged in the valve body 1, an opening for passing materials is formed in the middle of the spherical valve core 3, a valve rod 4 is fixedly connected right above the spherical valve core 3, a hand wheel 5 is arranged on the outer side of the valve cover 2, a helical gear 10 is arranged at the top end of the valve rod 4, a screw rod 11 is arranged at the rotating shaft of the hand wheel 5, a sleeve 12 is arranged on the side surface of the valve cover 2, the sleeve 12 is welded with the valve cover 2, the screw rod 11 rotates in the sleeve 12, the screw rod 11 and the helical gear 10 are meshed, the hand wheel 5 drives the valve rod 4 to rotate, a first sealing element 6 is arranged at the contact part of the spherical valve core 3 and the valve body 1, the first sealing element 6 is a rubber ring, the first sealing element 6 is respectively arranged at the upper end and the lower end of the valve core to prevent the medium in the pipeline from leaking from the contact part of the spherical valve body 1 and the spherical valve core 3, the contact position of valve rod 4, valve gap 2 is equipped with second sealing member 7, and second sealing member 7 is the graphite ring, has good leakproofness, and is difficult to wear and tear, is equipped with sealed grease chamber 8 between valve rod 4, the valve gap 2, and sealed grease chamber 8 is the cavity that encircles valve rod 4, and its inside sealed grease that uses fills up, specifically uses organosilicon sealing grease to fill up the cavity in the sealed grease chamber 8, can effectively prevent that gaseous medium from leaking from the gap of valve rod 4, valve rod 2.

And a third sealing element 9 is arranged between the valve rod 4 and the valve cover 2, the upper side and the lower side of the sealed oil chamber 8 of the third sealing element 9 are respectively provided with one, and the third sealing element 9 is a polytetrafluoroethylene sealing ring and is used for preventing sealing grease from leaking from the sealed oil chamber 8 and preventing the sealing grease in the sealed oil chamber 8 from reducing to cause the reduction of sealing performance.

The working principle is as follows: valve body 1, the welding of valve gap 2 is in the same place, make whole ball valve surface only have screw rod 11 and sleeve department to have the gap, through setting up first sealing member 6, second sealing member 7, sealed grease chamber 8, third sealing member 9, carry out compound seal to the ball valve, and first sealing member 6, second sealing member 7, sealed grease chamber 8, third sealing member 9 has adopted different sealing materials respectively, it is sealed effectual, can effectively prevent the medium leakage in the pipeline, take place the blasting accident when avoiding carrying flammable and explosive media such as natural gas.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a combined seal fire prevention welding ball valve, includes valve body (1), valve gap (2), valve body (1), valve gap (2) welding are in the same place, be equipped with spherical case (3) in valve body (1), fixedly connected with valve rod (4) directly over spherical case (3), valve gap (2) outside is equipped with hand wheel (5), valve rod (4), hand wheel (5) power connection, its characterized in that, the contact site of spherical case (3), valve body (1) is equipped with first sealing member (6), the contact site of valve rod (4), valve gap (2) is equipped with second sealing member (7), be equipped with sealed grease chamber (8) between valve rod (4), the valve gap (2), use sealed grease to fill in sealed grease chamber (8).

2. A composite sealing fireproof welded ball valve according to claim 1, characterized in that a third sealing element (9) is arranged between the valve rod (4) and the valve cover (2), and the third sealing element (9) is arranged on each of the upper and lower sides of the sealing oil chamber (8).

3. A composite sealing fireproof welding ball valve according to claim 1, wherein the top end of the valve rod (4) is provided with a bevel gear (10), the rotating shaft of the hand wheel (5) is provided with a screw rod (11), the side surface of the valve cover (2) is provided with a sleeve (12), the screw rod (11) rotates in the sleeve (12), and the screw rod (11) and the bevel gear (10) are meshed.

4. A composite sealing fireproof welded ball valve according to claim 1 or 2, wherein the first sealing member (6) is a rubber ring, and the first sealing member (6) is provided one at each of the upper and lower ends of the valve element.

5. A composite sealing fire resistant welded ball valve according to claim 1 or 2, characterized in that the second seal (7) is a graphite ring.

6. A composite sealing fire resistant welded ball valve according to claim 2, characterized in that the third seal (9) is a teflon sealing ring.