CN217736470U

CN217736470U - Follow-on gate valve packing sealing member

Info

Publication number: CN217736470U
Application number: CN202221993993.3U
Authority: CN
Inventors: 符春红; 王荣兵; 王珲; 刘华; 王子杰
Original assignee: Jiangsu Sanyi Petroleum Equipment Co ltd
Current assignee: Jiangsu Sanyi Petroleum Equipment Co ltd
Priority date: 2022-07-30
Filing date: 2022-07-30
Publication date: 2022-11-04
Anticipated expiration: 2032-07-30

Abstract

The utility model belongs to the field of gate valves in oil drilling and production equipment, and particularly discloses an improved gate valve packing sealing element, which comprises a valve body, a valve rod, a valve cover, a gland sealer and a packing assembly; the packing component is sleeved on the valve rod; a gland sealer is arranged above the packing component; the gland sealer comprises a packing pressing cylinder, a movable device and a movable gasket; the packing pressing cylinder is fixed on an inner hole of the valve cover; the movable device is in a cylindrical shape and is sleeved on the valve rod and connected with the packing pressing cylinder; the movable gasket is arranged at the bottom of the movable device, the diameter of the outer ring is equal to the outer diameter of the packing pressing cylinder, and the movable gasket is abutted against the upper end face of the packing component; the upper end surface of the movable device is provided with a level bubble. The technical problems that when the traditional gate valve packing gland is used for adjusting the sealing packing, the packing is prone to shifting due to uneven force applied to two sides of a pressing plate, and the medium leaks are solved.

Description

Follow-on gate valve packing sealing member

Technical Field

The utility model belongs to the technical field of the gate valve in the oil drilling equipment, concretely relates to follow-on gate valve packing seal spare.

Background

In main oil storage and transportation equipment, the gate valves are large in number, maximum in type and specification and respectively arranged in explosion dangerous places such as a pump room, a flow meter room and a valve group area. Due to the fact that the gate valve packing and the sealing piece are of the structure, the phenomenon that the sealing position of the gate valve rod packing leaks is very common, and great hidden danger is brought to safety production. Meanwhile, the method is also a persistent symptom in the renovation of oil transportation equipment.

The packing gland of the existing gate valve is sealed by controlling the compression ring through a pair of split type pressure plates to compress packing. The sealing element with the structure has the biggest defects that when the packing is leaked and fastened at the packing position of the valve, the packing is easily damaged due to uneven stress of the packing, and when the gate valve in a high-pressure working state is fastened, a medium is sprayed out due to uneven stress of the packing, so that danger is generated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: when the traditional gate valve packing gland is used for adjusting the sealing packing, force is easily applied on two sides of a pressing plate unevenly, so that the packing is deviated, and a medium leaks.

The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme as follows:

an improved gate valve packing seal comprises a valve body, a valve rod, a valve cover, a gland sealer and a packing assembly; the valve body is connected with the valve cover, and the valve rod penetrates through the valve cover and the valve body; the valve rod is coaxially arranged with the valve cover and the valve body; a packing cavity is arranged between the valve rod and the valve body, and a packing assembly is arranged in the packing cavity; the packing component is sleeved on the valve rod; a gland sealer is arranged above the packing component; the gland sealer comprises a packing pressing cylinder, a movable device and a movable gasket; the packing pressing cylinder is fixed on an inner hole of the valve cover; the movable device is sleeved on the valve rod in a cylindrical shape and is connected with the packing pressing cylinder; the movable gasket is arranged at the bottom of the movable device, the diameter of the outer ring is equal to the outer diameter of the packing pressing barrel, and the outer ring abuts against the upper end face of the packing assembly; and a level bubble is arranged on the upper end surface of the movable device.

Furthermore, a first flange plate is arranged on the upper end face of the valve body, a second flange plate is arranged on the lower end face of the valve cover, and the fastening piece penetrates through the first flange plate and the second flange plate and is in threaded connection with the valve body and the valve cover.

Further, the packing pressing cylinder is in interference fit with an inner hole of the valve cover.

Furthermore, a flange end is arranged at the upper end of the movable device, a threaded hole is formed in the flange end, a threaded counter bore is formed in the upper end face of the corresponding packing pressing cylinder, and the movable device is fixed to the upper end face of the packing pressing cylinder through bolts.

Furthermore, the number of the threaded holes is 4, 6 or 8, and the threaded holes are uniformly distributed by taking the circle center as a midpoint.

Furthermore, the bottom end face of the movable device is provided with a T-shaped groove, the upper end face of the movable gasket is provided with a corresponding protruding structure, and the protruding structure is embedded in the T-shaped groove.

Further, the movable gasket is composed of a pair of concentric semi-circle movable gaskets.

Further, the bottom end face of the packing pressing cylinder is higher than that of the movable device.

Furthermore, 2 or 4 long grooves are uniformly arranged on the upper end face of the movable device, the symmetrical long grooves are arranged in parallel, and level bubbles are arranged in the long grooves.

Has the beneficial effects that: compared with the prior art, the utility model has the advantages of it is following:

1. when the traditional gate valve packing gland adjusts the sealing packing, the force is easily applied on two sides of a pressing plate unevenly, so that the packing is deviated, and the medium leaks. When the gland sealer is used for adjusting the sealing filler, the movable device is adjusted through the bolts and the air level, and whether the movable device is horizontal or not can be judged according to the air level. And only the movable gasket is controlled by the movable device, sliding friction cannot be generated between the movable gasket and the filler, and the sealing filler is compressed integrally, so that the filler is stressed uniformly, and the filler is protected and the service life of the filler is prolonged. Meanwhile, the device also has the characteristics of simple structure, convenient use, safety, reliability and the like.

2. The movable device and the movable gasket are connected into a whole and are movable, and when the filler is adjusted, inherent sliding friction is generated between the movable device and the movable gasket. The movable gasket is adjusted to lift through the movable device, so that the filler is compressed to realize sealing. Therefore, sliding friction cannot be generated between the movable gasket and the packing, and the sealing packing is only compressed integrally.

3. The gland sealer integrally adopts a split structure, and has the advantages of low processing difficulty and convenience in assembly. Traditional gland will consider valve gap and valve rod both size when adding man-hour simultaneously, and the machining precision requires highly, and the concentricity requires more highly, need process the screw thread mounting hole that corresponds on the valve gap, and the size precision requires highly, and the later stage assembly is complicated.

4. The packing pressing cylinder can be used for fixing the whole gland sealer on the valve cover firmly by adopting an interference fit mode with the valve cover, only the size of the valve cover needs to be considered during processing, the processing technology requirement is low, and the later assembly is simple. The size of the valve rod is taken into consideration when the movable device is processed by an inner hole. The outer ring and the packing pressing barrel are integrated assembly parts, complete processing is realized, and the process difficulty is lower.

5. The movable gasket is simple to assemble by adopting a half-and-half splicing structure, can be better attached to the valve rod during installation, and has better sealing property.

Drawings

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

fig. 2 is a top view of fig. 1.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples, which are carried out in the light of the technical solutions of the present invention, and it should be understood that these examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, the improved gate valve packing seal of the present application includes a valve body 1, a valve rod 2, a valve cap 3, a gland sealer 4, a packing assembly 5;

the upper end surface of the valve body 1 is provided with a first flange 6, the lower end surface of the valve cover 3 is provided with a second flange 7, and the fastening piece passes through the first flange 6 and the second flange 7 and is in threaded connection with the valve body 1 and the valve cover 3; the valve rod 2 penetrates through the valve cover 3 and the valve body 1, and the valve rod 2 is coaxially arranged with the valve cover 3 and the valve body 1; a packing cavity is arranged between the valve rod 2 and the valve body 1, and a packing component 5 is arranged in the packing cavity; the packing component 5 is sleeved on the valve rod 2; a gland sealer 4 is arranged above the packing component 5, and the lower end face of the gland sealer 4 is abutted against the upper end face of the packing component 5.

The gland sealer 4 includes a packing gland 41, a mover 42, and a movable gasket 43. The packing pressure cylinder 41 is fixed on the inner hole of the valve cover 3, and the movable device 42 is cylindrical and sleeved on the valve rod 2 and is connected with the packing pressure cylinder 41; the movable gasket 43 is arranged at the bottom of the movable device 42, the diameter of the outer ring is equal to the outer diameter of the packing pressing cylinder 41, and the movable gasket abuts against the upper end face of the packing component 5. The method comprises the following specific steps:

the packing pressing cylinder 41 is in interference fit with the inner hole of the valve cover 3, and the packing pressing cylinder 41 is firmly fixed on the valve cover 3.

The upper end of the movable device 42 is provided with a flange end, the flange end is provided with a threaded hole 44, the upper end face of the corresponding packing pressing cylinder 41 is provided with a threaded counter bore 45, and the movable device 42 is installed on the upper end face of the packing pressing cylinder 41 through a bolt 8.

The number of the threaded holes 44 is 4, 6 or 8, and the threaded holes are uniformly distributed by taking the circle center as a midpoint.

The bottom end surface of the movable device 42 is provided with a T-shaped groove 46, the upper end surface of the movable gasket 43 is provided with a corresponding protruding structure 47, and the protruding structure 47 is embedded in the T-shaped groove 46. The connection of the movable pad 43 to the mobilizer 42 is achieved and they are mobile, creating an inherent sliding friction between them when the padding is adjusted. The movable gasket 43 is adjusted to lift through the movable device 42, so that the packing is pressed to realize sealing.

The movable pad 43 is composed of a pair of concentric semicircular movable pads. The movable gasket 43 is of a half-and-half splicing structure, so that the assembly is simple, the movable gasket can be better attached to the valve rod during installation, and the sealing performance is better.

To ensure the space for the movable pad 43, the bottom end surface of the packing press cylinder 41 is higher than the bottom end surface of the movable device 42.

In order to ensure the uniform loading of the filler, a level bubble is arranged on the upper end face of the movable device 42, specifically:

2 or 4 long grooves 48 are uniformly arranged on the upper end face of the movable device 42, the symmetrical long grooves 48 are arranged in parallel, and level bubbles are arranged in the long grooves 48. The level bubble uses the common long level bubble.

The leveling bubble arranged on the movable device 42 can observe the horizontal condition of the movable device 42 during adjustment, so that the movable device 42 can uniformly lift up and down, and the filler is uniformly stressed.

The packing component 5 adopts a gasket packing made by sticking carbon fiber flexible graphite and polytetrafluoroethylene, four layers of gaskets are divided, the notches of each ring are staggered by 90 degrees, a proper pre-compression amount is reserved, and the notch of the last layer of gasket is tightly wound by nylon thread and asbestos thread, so that when the spiral gland sealer moves up and down, the bottom ring is not opened.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an improved generation gate valve packing seal spare which characterized in that: comprises a valve body (1), a valve rod (2), a valve cover (3), a gland sealer (4) and a packing component (5); the valve body (1) is connected with the valve cover (3), and the valve rod (2) penetrates through the valve cover (3) and the valve body (1); the valve rod (2) is coaxially arranged with the valve cover (3) and the valve body (1); a packing cavity is arranged between the valve rod (2) and the valve body (1), and a packing assembly (5) is arranged in the packing cavity; the packing component (5) is sleeved on the valve rod (2); a gland sealer (4) is arranged above the packing component (5); the gland sealer (4) comprises a packing pressing cylinder (41), a movable device (42) and a movable gasket (43); the packing pressing cylinder (41) is fixed on an inner hole of the valve cover (3); the movable device (42) is sleeved on the valve rod (2) in a cylindrical shape and is connected with the packing pressing cylinder (41); the movable gasket (43) is arranged at the bottom of the movable device (42), the diameter of the outer ring is equal to the outer diameter of the packing pressing cylinder (41), and the outer ring is abutted to the upper end face of the packing component (5); the upper end face of the movable device (42) is provided with a level bubble.

2. The improved gate valve packing seal of claim 1, wherein: the valve body (1) upper end face is equipped with first ring flange (6), and the terminal surface is equipped with second ring flange (7) under valve gap (3), and first ring flange (6), second ring flange (7) are passed to the fastener, threaded connection valve body (1) and valve gap (3).

3. The improved gate valve packing seal of claim 1, wherein: the packing pressing cylinder (41) is in interference fit with an inner hole of the valve cover (3).

4. The improved gate valve packing seal of claim 1, wherein: the upper end of the movable device (42) is provided with a flange end, the flange end is provided with a threaded hole (44), the upper end face of the corresponding packing pressing cylinder (41) is provided with a threaded counter bore (45), and the movable device (42) is fixed on the upper end face of the packing pressing cylinder (41) through a bolt (8).

5. The improved gate valve packing seal of claim 4, wherein: the number of the threaded holes (44) is 4, 6 or 8, and the threaded holes are uniformly distributed by taking the circle center as a midpoint.

6. The improved gate valve packing seal of claim 1, wherein: the bottom end face of the movable device (42) is provided with a T-shaped groove (46), the upper end face of the movable gasket (43) is provided with a corresponding protruding structure (47), and the protruding structure (47) is embedded in the T-shaped groove (46).

7. The improved gate valve packing seal of claim 1 or 6, wherein: the movable gasket (43) is composed of a pair of concentric semi-circle movable gaskets.

8. The improved gate valve packing seal of claim 1, wherein: the bottom end surface of the filling material pressing cylinder (41) is higher than that of the movable device (42).

9. The improved gate valve packing seal of claim 1, wherein: 2 or 4 long grooves (48) are uniformly arranged on the upper end face of the movable device (42), the symmetrical long grooves (48) are arranged in parallel, and level bubbles are arranged in the long grooves (48).