CN202867900U - Two-way omni-seal gate valve - Google Patents
Two-way omni-seal gate valve Download PDFInfo
- Publication number
- CN202867900U CN202867900U CN 201220447950 CN201220447950U CN202867900U CN 202867900 U CN202867900 U CN 202867900U CN 201220447950 CN201220447950 CN 201220447950 CN 201220447950 U CN201220447950 U CN 201220447950U CN 202867900 U CN202867900 U CN 202867900U
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- valve
- gate valve
- roller bearing
- disc
- way
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Abstract
The utility model discloses a two-way omni-seal gate valve. The two-way omni-seal gate valve comprises a valve body, a valve disc, a valve rod and a valve deck. The valve disc is fixed on the valve body. One end of the valve rod is fixed in an inner cavity channel of the valve disc and the other end of the valve rod is connected with a hand wheel. A hollow valve cavity is formed between the valve disc and the valve deck. A stuffing box is located on the upper portion of the valve cavity. A cylindrical roller bearing and a cylindrical helical compressing spring are arranged outside the valve rod in a sleeved mode. The cylindrical roller bearing, the cylindrical helical compressing spring and sealed stuffing are tightly pressed in the stuffing box through a stuffing pressing cover. According to the two-way omni-seal gate valve, the sealed stuffing is tightly pressed and the structure of the gate valve is simplified through the compressing spring, axial friction torque of the valve rod is effectively reduced through a thrust of the cylindrical roller bearing and a pre-tightening force of the cylindrical helical compressing spring, opening and closing torsion of the valve is reduced, and therefore sealing performance of the gate valve is effectively improved, and two-way omni sealing is achieved.
Description
Technical field
The utility model relates to a kind of gate valve, relates in particular to a kind of two-way hermetically sealed gate valve for the pipeline industry.
Background technique
Gate valve refers to close the parts of the valve that moves along the Vertical direction of passage axis, is widely used on the pipeline in various types of valves as cutting off media components.
Packing box seal is relatively simple for structure between the valve gap of existing gate valve and the valve rod, all be to provide the filler pretightening force to guarantee the sealing of packing cavity by hanging bolt, Gland, but the pretightening force of bolt can't accurately be held, bolt pretightening is large, then the moment of torsion of valve rod is just large, bolt pretightening is little, and then the packing cavity filler causes the leakage of medium with regard to blow-by; Such as traditional CB/T465,466,467, the gate valves peculiar to vessel such as 3591 the problems referred to above are arranged.
In addition, the open-shut device of gate valve (gate valve) is flashboard, and moving direction and the flow direction of flashboard are perpendicular, and gate valve can only be made standard-sized sheet and complete shut-down, can not do to regulate and throttling.Flashboard has two sealing surfaces, and two sealing surfaces of the most frequently used pattern gate valve form wedge shape, key groove is different with the valve parameter.But the valve gap packing box seal of existing gate valve is relatively simple for structure, can't realize two way sealed, and the moment of torsion that the frictional force between valve rod and the filler produces is larger.Therefore be necessary existing gate valve structure is improved, improve sealability.
The model utility content
Technical problem to be solved in the utility model provides a kind of two-way hermetically sealed gate valve, can Effective Raise Gate-valve sealing performance, realize two-way hermetically sealed, and simple in structure, easy to implement.
The utility model is to solve the problems of the technologies described above the technological scheme that adopts to provide a kind of two-way hermetically sealed gate valve, comprise valve body, valve disc, valve rod and valve gap, described valve disc is fixed on the valve body, one end of described valve rod is fixed in the bore passages of valve disc, the other end links to each other with handwheel, form the valve pocket of hollow between described valve disc and the valve gap, described valve pocket top is stuffing box, wherein, described valve rod is arranged with roller bearing and cylindroid helicalcoil compression spring outward, described roller bearing, cylindroid helicalcoil compression spring and stuffing box packing are pressed in the stuffing box by Gland.
Above-mentioned two-way hermetically sealed gate valve wherein, is provided with Packing seat and the first packing ring between described roller bearing and the cylindroid helicalcoil compression spring.
Above-mentioned two-way hermetically sealed gate valve wherein, is provided with O type circle and the second pad between described roller bearing and the Gland.
Above-mentioned two-way hermetically sealed gate valve, wherein, described valve gap is provided with indicating arm and pointer.
The utility model contrast prior art has following beneficial effect: the two-way hermetically sealed gate valve that the utility model provides, utilize Compress Spring press seal filler, and reduced the use of Gland, stud bolt, nut material, simplify gate valve structure; Thrust by roller bearing and the pretightening force of cylindroid helicalcoil compression spring effectively reduce stem shaft to friction torque, the open and close moment of valve is remained in the rational scope, reduced the open and close moment of torsion of valve, thereby Effective Raise Gate-valve sealing performance realizes two-way hermetically sealed.
Description of drawings
Fig. 1 is the two-way hermetically sealed gate valve structure schematic diagram of the utility model;
Fig. 2 is the enlarged diagram of A part valve gap stuffing box among Fig. 1.
Among the figure:
1 valve body, 2 valve discs, 3 square nuts
4 valve rods, 5 bolts, 6 nuts
7 first pads, 8 valve gaps, 9 Glands
10 second pad 11O type circles, 12 roller bearings
13 Packing seats, 14 first packing rings, 15 cylindroid helicalcoil compression springs
16 indicating arms, 17 pointers, 18 second packing rings
19 nuts, 20 handwheels, 21 plug screws
22 the 3rd pads
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 1 is the two-way hermetically sealed gate valve structure schematic diagram of the utility model; Fig. 2 is the enlarged diagram of A part valve gap stuffing box among Fig. 1.
See also Fig. 1 and Fig. 2, the two-way hermetically sealed gate valve that the utility model provides comprises valve body 1, valve disc 2, valve rod 4 and valve gap 8, described valve disc 2 is fixed on the valve body 1, valve body 1 and valve gap 8 can be fixed together by bolt 5 and nut 6, one end of described valve rod 4 is fixed in the bore passages of valve disc 2, the other end links to each other with handwheel 20, form the valve pocket of hollow between described valve disc 2 and the valve gap 8, described valve pocket top is stuffing box, wherein, described valve rod 4 outer roller bearing 12 and the cylindroid helicalcoil compression springs 15, described roller bearing 12 of being arranged with, cylindroid helicalcoil compression spring 15 and stuffing box packing are pressed in the stuffing box by Gland 9.Can further be provided with indicating arm 16 and pointer 17 on the described valve gap 8; Handwheel 20 is fixed on the valve rod 4 by nut 19 and the second packing ring 18; Valve body 1 bottom is provided with the 3rd pad 22 and plug screw 21.
The two-way hermetically sealed gate valve that the utility model provides is provided with Packing seat 13 and the first packing ring 14 between described roller bearing 12 and the cylindroid helicalcoil compression spring 15; Be provided with O type circle 11 and the second pad 10 between described roller bearing 12 and the Gland 9, in order to further improve the packing seal effect.
The two-way hermetically sealed gate valve that the utility model provides, working procedure is as follows: in valve closing moment, the reaction force of the axial force that valve rod 4 is closed downwards by on push away roller bearing 12 and provide axial pressing force upwards to Packing seat 13, meanwhile Packing seat 13 also is subject to the downward pretightening force that cylindrically coiled spring 15 provides.Be subject to simultaneously at Packing seat 13 in the situation of bidirectional axial force up and down, the sealability of closing the larger filler of moment is better; In the moment of opening, the reaction force that valve rod 4 upwardly opens power pulls down valve rod 4, and axis sealing is not provided, and pass through accurate Calculation by cylindrically coiled spring 15(this moment) downward pretightening force provides filler required sealing force.
Therefore the two-way hermetically sealed gate valve that the utility model provides adopts cylindrically coiled spring 15 to replace old-fashioned Gland (bolt connection) press seal.Old-fashioned Gland compresses the required pretightening force of filler to be difficult to quantize, and wayward, the pretightening force that bolt provides is large, opens friction torque just greatly; Otherwise the pretightening force that bolt provides is little, and then filler can not be sealed because sealing force is little.Because the friction between roller bearing 12 and valve rod 4 steps is changed into the rolling friction of present structure by the sliding friction of original structure, thereby reduced to greatest extent the friction torque that the valve rod axial force causes, the open and close moment of valve is remained in the rational scope, reduced to a certain extent the open and close moment of torsion of valve.
Although the utility model discloses as above with preferred embodiment; so it is not to limit the utility model; any those skilled in the art; within not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (4)
1. two-way hermetically sealed gate valve, comprise valve body (1), valve disc (2), valve rod (4) and valve gap (8), described valve disc (2) is fixed on the valve body (1), one end of described valve rod (4) is fixed in the bore passages of valve disc (2), the other end links to each other with handwheel (20), form the valve pocket of hollow between described valve disc (2) and the valve gap (8), described valve pocket top is stuffing box, it is characterized in that, outer roller bearing (12) and cylindroid helicalcoil compression spring (15), the described roller bearing (12) of being arranged with of described valve rod (4), cylindroid helicalcoil compression spring (15) and stuffing box packing are pressed in the stuffing box by Gland (9).
2. two-way hermetically sealed gate valve as claimed in claim 1 is characterized in that, is provided with Packing seat (13) and the first packing ring (14) between described roller bearing (12) and the cylindroid helicalcoil compression spring (15).
3. two-way hermetically sealed gate valve as claimed in claim 1 is characterized in that, is provided with O type circle (11) and the second pad (10) between described roller bearing (12) and the Gland (9).
4. two-way hermetically sealed gate valve as claimed in claim 1 is characterized in that, described valve gap (8) is provided with indicating arm (16) and pointer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220447950 CN202867900U (en) | 2012-09-04 | 2012-09-04 | Two-way omni-seal gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220447950 CN202867900U (en) | 2012-09-04 | 2012-09-04 | Two-way omni-seal gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867900U true CN202867900U (en) | 2013-04-10 |
Family
ID=48034621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220447950 Expired - Fee Related CN202867900U (en) | 2012-09-04 | 2012-09-04 | Two-way omni-seal gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867900U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687537A (en) * | 2016-11-10 | 2018-02-13 | 俞钟晓 | Has the gate valve of open/close states indicator function |
| CN113757401A (en) * | 2021-09-07 | 2021-12-07 | 哈电集团哈尔滨电站阀门有限公司 | Manual wedge type gate valve capable of preventing wedge from being dead |
-
2012
- 2012-09-04 CN CN 201220447950 patent/CN202867900U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687537A (en) * | 2016-11-10 | 2018-02-13 | 俞钟晓 | Has the gate valve of open/close states indicator function |
| CN113757401A (en) * | 2021-09-07 | 2021-12-07 | 哈电集团哈尔滨电站阀门有限公司 | Manual wedge type gate valve capable of preventing wedge from being dead |
| CN113757401B (en) * | 2021-09-07 | 2022-04-22 | 哈电集团哈尔滨电站阀门有限公司 | Manual wedge type gate valve capable of preventing wedge from being dead |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20160904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |