CN212868476U - Novel small-bore low-temperature stop valve - Google Patents
Novel small-bore low-temperature stop valve Download PDFInfo
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- CN212868476U CN212868476U CN202021141287.7U CN202021141287U CN212868476U CN 212868476 U CN212868476 U CN 212868476U CN 202021141287 U CN202021141287 U CN 202021141287U CN 212868476 U CN212868476 U CN 212868476U
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Abstract
A novel small-caliber low-temperature stop valve relates to the technical field of small-caliber low-temperature stop valves. The technical defects that the existing small-caliber low-temperature stop valve is labor-consuming to operate and inconvenient to use are overcome, and the small-caliber low-temperature stop valve comprises a valve body, a valve cover, a valve rod, a valve clack and a hand wheel; the valve clack is arranged in the upper cavity, a valve rod containing cavity is arranged at the top of the valve clack, a T-shaped head is arranged at the bottom end of the valve rod, the T-shaped head is arranged in the valve rod containing cavity, a valve clack cover with the inner diameter smaller than that of the T-shaped head is movably sleeved on the valve rod, and the valve clack cover is fixedly connected with the valve rod containing cavity; the bottom of the valve clack is provided with a stud extending into the valve hole, a valve clack sealing gasket is sleeved on the stud, the bottom surface of the valve clack sealing gasket is provided with a gasket, and the stud is further provided with a locknut for locking and fixing the valve clack sealing gasket and the gasket. In the process of switching operation, the valve clack and the valve body cannot generate rotating friction, and the valve is light to operate and good in reliability.
Description
Technical Field
The utility model relates to small-bore low temperature stop valve technical field.
Background
The low-temperature stop valve is generally used on a medium-small-caliber high-pressure low-temperature medium pipeline with the temperature of-29-196 ℃ and used for connecting and opening a medium. The low temperature stop valve need have extremely strong sealing characteristic, and too high leakproofness demand can influence the valve rod and rotate, and in addition current minor bore low temperature stop valve's valve clack rotates along with the valve rod, and the fluid resistance that the valve clack received in the switch stroke is great, and the operation is harder, and is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
To sum up, the utility model discloses an it is harder that aim at solves current small-bore low temperature stop valve operation, and inconvenient technique is not enough, and provides a novel small-bore low temperature stop valve.
For solving the technical problem of the utility model, the technical scheme of adoption is:
a novel small-caliber low-temperature stop valve comprises a valve body, a valve cover, a valve rod, a valve clack and a hand wheel; the valve body is locked and connected with the valve cover through a flange structure, the valve rod is inserted into the valve body and the valve cover, the valve rod is in threaded fit with the valve cover, the top end of the valve rod is fixedly connected with the hand wheel, and the bottom end of the valve rod is connected with the valve clack in the valve body; the method is characterized in that: a lower cavity directly communicated with the inlet and an upper cavity directly communicated with the outlet are arranged in the valve body, the upper cavity is arranged above the lower cavity, and a valve hole corresponding to the valve clack is arranged on the side wall of the upper cavity adjacent to the lower cavity; the valve clack is arranged in the upper cavity, a valve rod containing cavity is arranged at the top of the valve clack, a T-shaped head is arranged at the bottom end of the valve rod and arranged in the valve rod containing cavity, a valve clack cover with the inner diameter smaller than that of the T-shaped head is movably sleeved on the valve rod, and the valve clack cover is fixedly connected with the valve rod containing cavity; the bottom of valve clack is equipped with the double-screw bolt that extends to in the valve opening, has cup jointed the valve clack and has sealed the pad on the double-screw bolt, and the outer lane diameter that the valve clack is sealed is greater than the valve opening diameter, and the bottom surface that the valve clack was sealed is equipped with the packing ring that the outer lane diameter is less than the valve opening, still is equipped with the lock nut who fixes the valve clack and seal pad and packing ring on the double.
As to the technical scheme of the utility model for further limiting includes:
the inner wall of an opening at the upper end of the valve cover is provided with a packing groove, and a packing pad, a packing and a packing pressing sleeve which are sleeved with the valve rod are sequentially arranged in the packing groove from bottom to top; an inner sealing ring clamping groove and an outer sealing ring clamping groove are respectively arranged on the inner side wall and the outer side wall of the packing pressing sleeve, an inner O-shaped ring and an outer O-shaped ring are respectively arranged in the inner sealing ring clamping groove and the outer sealing ring clamping groove, and a packing gland used for compressing the packing pressing sleeve is connected to the valve cover through threads.
The valve cover is further sleeved with a locking nut in a threaded manner, and the locking nut is located below the packing gland.
The cross section of the filler is of an arc structure with a downward opening.
And the valve clack cover and the valve rod accommodating cavity are connected in a fastening mode through threads and welding.
The valve cover bottom opening in the embedding be fixed with the valve rod nut, threaded connection between valve rod nut and the valve rod still is equipped with holding screw in the joint seam department between valve rod nut and valve cover.
The upper edge of the opening of the valve hole is provided with a sealing convex edge which is in sealing fit with the valve clack sealing gasket.
A flange gasket is arranged between the valve body and the valve cover, and the valve body and the valve cover are fixedly connected through a stud and a nut.
The bottom of the valve clack is also provided with a sealing gasket positioning groove matched with the sealing gasket of the valve clack.
The utility model has the advantages that: the utility model discloses a bottom of valve rod is passed through T type head and is connected with the automatic rotation of valve clack, through reciprocating of valve rod through the valve clack lift, realizes opening or closing of pipeline, and among the switch operation process, can not produce spin friction between valve clack and the valve body, the light operation, the good reliability.
Drawings
Fig. 1 is a schematic view of the structural principle of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and preferred embodiments of the invention.
Referring to fig. 1, the utility model relates to a novel small-bore low temperature stop valve, including valve body 1, valve gap 9, valve rod 6, valve clack 5 and hand wheel 19.
The valve body 1 is connected with the valve cover 9 in a locking way through a flange structure; the method specifically comprises the following steps: a flange gasket 7 is arranged between the valve body 1 and the valve cover 9, and the valve body 1 and the valve cover 9 are fixedly connected through a stud and a nut 12.
Valve rod 6 inserts in valve body 1 and valve gap 9, and screw-thread fit specifically can adopt between valve rod 6 and the valve gap 9: valve gap 9 bottom opening in the embedding be fixed with valve-stem nut 8, valve-stem nut 8 can the screw thread screw in valve gap 9, in order to prevent that 8 later stages of valve-stem nut from using appearing becoming flexible, joint department still is equipped with holding screw 11 between valve-stem nut 8 and valve gap 9. The valve rod nut 8 is in threaded connection with the valve rod 6, the top end of the valve rod 6 is fixedly connected with the hand wheel 19, and the bottom end of the valve rod is connected with the valve clack 5 in the valve body 1; after the hand wheel 19 is rotated, the valve rod 6 and the valve rod nut 8 move relatively, the valve rod 6 moves upwards, the valve clack 5 is lifted, and the valve is opened.
The utility model discloses realize that the specific structure that the valve was opened or was closed including: a lower cavity 31 directly communicated with the inlet and an upper cavity 32 directly communicated with the outlet are arranged in the valve body 1, the upper cavity 32 is arranged above the lower cavity 31, and a valve hole 33 corresponding to the valve clack 5 is arranged on the adjacent side wall of the upper cavity 32 and the lower cavity 31; the valve clack 5 is arranged in the upper cavity 32, a valve rod containing cavity 51 is arranged at the top of the valve clack 5, a T-shaped head is arranged at the bottom end of the valve rod 6, the T-shaped head is arranged in the valve rod containing cavity 51, a valve clack cover 10 with the inner diameter smaller than that of the T-shaped head is movably sleeved on the valve rod 6, and the valve clack cover 10 is fixedly connected with the valve rod containing cavity 51; that is, in the assembling process, firstly, the valve clack cover 10 is sleeved on the valve rod 6, then the T-shaped head is installed in the valve clack 5, the valve clack cover 10 and the valve clack 5 are locked in a threaded mode, the T-shaped head cannot fall off from the valve rod containing cavity 51 of the valve clack 5, the valve rod 6 and the valve clack 5 can freely rotate, and then the valve rod 6 penetrates out of the valve cover 9. In order to further prevent the valve flap cover 10 and the valve rod cavity 51 from being loosened, the valve flap cover 10 and the valve rod cavity 51 are fixedly connected by welding.
The bottom of the valve clack 5 is provided with a stud 34 extending into the valve hole 33, a valve clack sealing gasket 4 is sleeved on the stud 34, the diameter of the outer ring of the valve clack sealing gasket 4 is larger than that of the valve hole 33, a washer 3 with the diameter of the outer ring smaller than that of the valve hole 33 is arranged on the bottom surface of the valve clack sealing gasket 4, a locknut 2 for locking and fixing the valve clack sealing gasket 4 and the washer 3 is further arranged on the stud 34, and the locknut 2 is arranged in. Namely, under the pushing-down action force of the valve rod 6, the valve flap sealing gasket 4 seals the valve hole 33, and the valve is closed; the stud 34, the locknut 2 and the washer 3 play a role in fixing the valve clack sealing gasket 4, and in the closed state of the valve, the stud 34, the locknut 2 and the washer 3 are arranged in the valve hole 33, so that the valve clack 5 is prevented from descending.
In order to enable the valve flap sealing gasket 4 to better seal the valve hole 33, a sealing convex edge is arranged at the upper edge of the opening of the valve hole 33, and the sealing convex edge is in sealing fit with the valve flap sealing gasket 4. The bottom of the valve clack 5 is also provided with a sealing gasket positioning groove matched with the valve clack sealing gasket 4.
In order to realize the sealing between the valve cover 9 and the valve rod 6, the inner wall of an opening at the upper end of the valve cover 9 is provided with a packing groove, and a packing pad 14, a packing 16 and a packing pressing sleeve 17 which are sleeved with the valve rod 6 are sequentially arranged in the packing groove from bottom to top; an inner sealing ring clamping groove and an outer sealing ring clamping groove are respectively formed in the inner side wall and the outer side wall of the packing pressing sleeve 17, an inner O-shaped ring 23 and an outer O-shaped ring 24 are respectively arranged in the inner sealing ring clamping groove and the outer sealing ring clamping groove, and a packing gland 18 used for compressing the packing pressing sleeve 17 is connected to the valve cover 9 in a threaded mode. The tightness between the packing 16 and the valve rod 6 and the packing groove can be realized by rotating and adjusting the packing gland 18. In order to lock the packing gland 18 which is adjusted in place, the valve cover 9 is further sleeved with a locking nut 15 in a threaded manner, the locking nut 15 is located below the packing gland 18, and the locking nut 15 can be locked with the packing gland 18 by screwing upwards.
In order to better realize the sealing treatment between the valve cover 9 and the valve rod 6, the cross section of the packing 16 is of an arc structure with an opening facing downwards, the larger the pressing acting force of the packing 16 by the packing pressing sleeve 17 is, the larger the linear diameter of the packing 16 is, the better the sealing effect is, but the larger the friction acting force is.
Claims (9)
1. A novel small-caliber low-temperature stop valve comprises a valve body, a valve cover, a valve rod, a valve clack and a hand wheel; the valve body is locked and connected with the valve cover through a flange structure, the valve rod is inserted into the valve body and the valve cover, the valve rod is in threaded fit with the valve cover, the top end of the valve rod is fixedly connected with the hand wheel, and the bottom end of the valve rod is connected with the valve clack in the valve body; the method is characterized in that: a lower cavity directly communicated with the inlet and an upper cavity directly communicated with the outlet are arranged in the valve body, the upper cavity is arranged above the lower cavity, and a valve hole corresponding to the valve clack is arranged on the side wall of the upper cavity adjacent to the lower cavity; the valve clack is arranged in the upper cavity, a valve rod containing cavity is arranged at the top of the valve clack, a T-shaped head is arranged at the bottom end of the valve rod and arranged in the valve rod containing cavity, a valve clack cover with the inner diameter smaller than that of the T-shaped head is movably sleeved on the valve rod, and the valve clack cover is fixedly connected with the valve rod containing cavity; the bottom of valve clack is equipped with the double-screw bolt that extends to in the valve opening, has cup jointed the valve clack and has sealed the pad on the double-screw bolt, and the outer lane diameter that the valve clack is sealed is greater than the valve opening diameter, and the bottom surface that the valve clack was sealed is equipped with the packing ring that the outer lane diameter is less than the valve opening, still is equipped with the lock nut who fixes the valve clack and seal pad and packing ring on the double.
2. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: the inner wall of an opening at the upper end of the valve cover is provided with a packing groove, and a packing pad, a packing and a packing pressing sleeve which are sleeved with the valve rod are sequentially arranged in the packing groove from bottom to top; an inner sealing ring clamping groove and an outer sealing ring clamping groove are respectively arranged on the inner side wall and the outer side wall of the packing pressing sleeve, an inner O-shaped ring and an outer O-shaped ring are respectively arranged in the inner sealing ring clamping groove and the outer sealing ring clamping groove, and a packing gland used for compressing the packing pressing sleeve is connected to the valve cover through threads.
3. The novel small-caliber low-temperature stop valve according to claim 2, characterized in that: the valve cover is further sleeved with a locking nut in a threaded manner, and the locking nut is located below the packing gland.
4. The novel small-caliber low-temperature stop valve according to claim 2, characterized in that: the cross section of the filler is of an arc structure with a downward opening.
5. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: and the valve clack cover and the valve rod accommodating cavity are connected in a fastening mode through threads and welding.
6. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: the valve cover bottom opening in the embedding be fixed with the valve rod nut, threaded connection between valve rod nut and the valve rod still is equipped with holding screw in the joint seam department between valve rod nut and valve cover.
7. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: the upper edge of the opening of the valve hole is provided with a sealing convex edge which is in sealing fit with the valve clack sealing gasket.
8. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: a flange gasket is arranged between the valve body and the valve cover, and the valve body and the valve cover are fixedly connected through a stud and a nut.
9. The novel small-caliber low-temperature stop valve according to claim 1, characterized in that: the bottom of the valve clack is also provided with a sealing gasket positioning groove matched with the sealing gasket of the valve clack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021141287.7U CN212868476U (en) | 2020-06-19 | 2020-06-19 | Novel small-bore low-temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021141287.7U CN212868476U (en) | 2020-06-19 | 2020-06-19 | Novel small-bore low-temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212868476U true CN212868476U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021141287.7U Active CN212868476U (en) | 2020-06-19 | 2020-06-19 | Novel small-bore low-temperature stop valve |
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| Country | Link |
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| CN (1) | CN212868476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983214A (en) * | 2021-10-20 | 2022-01-28 | 上海沪东造船阀门有限公司 | Manual switch ultra-low temperature stop check valve |
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
-
2020
- 2020-06-19 CN CN202021141287.7U patent/CN212868476U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983214A (en) * | 2021-10-20 | 2022-01-28 | 上海沪东造船阀门有限公司 | Manual switch ultra-low temperature stop check valve |
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
| CN117108805B (en) * | 2023-10-18 | 2023-12-29 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
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