CN217874422U - Low temperature ball valve extension valve gap structure - Google Patents
Low temperature ball valve extension valve gap structure Download PDFInfo
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- CN217874422U CN217874422U CN202221916131.0U CN202221916131U CN217874422U CN 217874422 U CN217874422 U CN 217874422U CN 202221916131 U CN202221916131 U CN 202221916131U CN 217874422 U CN217874422 U CN 217874422U
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- temperature ball
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Abstract
The utility model relates to a low-temperature ball valve lengthening valve cover structure, which comprises a valve body, wherein the top of the valve body is provided with a packing box, a valve rod is arranged in the packing box in a penetrating way, and packing is arranged between the packing box and the valve rod; the support is fixed above the valve body, and a gland for compressing the packing is arranged in the support; and the valve cover is fixed above the support, a driving sleeve connected with the valve rod penetrates through the valve cover, and a heat insulation layer is arranged between the valve cover and the driving sleeve. This low temperature ball valve extension valve gap structure mainly designs to the low temperature ball valve, and the structure is simple relatively, can effectually prevent that the filler from revealing to get into the heat preservation, whole long service life has greatly improved the performance of valve.
Description
Technical Field
The utility model relates to a low temperature ball valve field, in particular to low temperature ball valve adds long valve gap structure.
Background
With the rapid development of the petroleum, chemical and gas industries, the demand of low-temperature valves is increasing. Because the problem of fluid in the valve cavity needs to be considered when designing the valve cover, a lengthened valve cover structure is generally adopted, so that the valve control device is far away from a low-temperature area of the valve, and cold burns of a valve operator caused by a low-temperature medium are avoided.
At present, conventional extension valve gap usually can install the filler in the top position, and the inboard of extension valve gap need install the heat preservation, and when the filler position was too close to the heat preservation, there was the valve rod to reveal the risk that gets into the heat preservation, and then influences the low temperature protection effect.
Therefore, the lengthened valve cover structure for preventing the filler from leaking into the heat insulation layer is researched.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the lengthened valve cover structure of the low-temperature ball valve is provided.
In order to achieve the technical effects, the utility model discloses a technical scheme be: a lengthened valve cover structure of a low-temperature ball valve comprises a valve body, wherein the top of the valve body is provided with a stuffing box, a valve rod penetrates through the stuffing box, and stuffing is arranged between the stuffing box and the valve rod; the support is fixed above the valve body, and a gland for compressing the packing is arranged in the support; and the valve cover is fixed above the support, a driving sleeve connected with the valve rod penetrates through the valve cover, and a heat insulation layer is arranged between the valve cover and the driving sleeve.
In one alternative, the filler is a low temperature resistant filler.
In an alternative, the low temperature resistant filler is a graphite filler or a PTFE filler.
In an optional scheme, the gland and the valve body are fixedly connected through a bolt, and a disc spring for applying pressure to the gland is arranged on the bolt.
In an alternative scheme, the top of the valve cover is provided with a flange joint.
In an alternative scheme, a water dropping plate is arranged in the middle of the valve cover.
In an optional scheme, the support and the valve body are detachably fixed, and the valve cover and the support are welded and fixed.
In an alternative arrangement, the drive sleeve is removably connected to the valve stem.
In an optional scheme, the bottom of the driving sleeve is provided with a groove portion, and the top of the valve rod is provided with a key portion, and the key portion is in inserted fit with the groove portion.
In an alternative, the insulating layer is a polyurethane layer.
Compared with the prior art, the beneficial effects of the utility model are that: this low temperature ball valve extension valve gap structure mainly designs to the low temperature ball valve, and the structure is simple relatively, can effectually prevent that the filler from revealing to get into the heat preservation, whole long service life has greatly improved the performance of valve.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Drawings
FIG. 1 is a schematic diagram of an extended bonnet structure of a low-temperature ball valve according to the embodiment;
the reference numbers and corresponding designations in the drawings are: 1. the valve comprises a valve body, a packing box 1a, a valve rod 2a, a key insertion part 2a, packing 3, a support 4, a gland 5, a valve cover 6, a flange connecting disc 6a, a driving sleeve 7, a groove part 7a, a heat insulation layer 8, a bolt 9, a disc spring 10 and a water dropping plate 11.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Referring to fig. 1, the embodiment discloses a lengthened valve cover 6 structure of a low-temperature ball valve, which comprises a valve body 1, wherein the top of the valve body is provided with a stuffing box 1a, a valve rod 2 penetrates through the stuffing box 1a, and a stuffing 3 is arranged between the stuffing box 1a and the valve rod 2; the support 4 is fixed above the valve body 1, and a gland 5 for compressing the packing 3 is arranged in the support 4; and the valve cover 6 is fixed above the support 4, a driving sleeve 7 connected with the valve rod 2 penetrates through the valve cover 6, and a heat insulation layer 8 is arranged between the valve cover 6 and the driving sleeve 7.
Above-mentioned structure is through seting up stuffing box 1a on valve body 1 to utilize support 4 to separate valve gap 6 and install directly over stuffing box 1a, this design is kept apart with the inboard heat preservation 8 of valve gap 6 filler 3 in the stuffing box 1a, and this just makes even filler 3 reveals also can not enter into heat preservation 8, and then has guaranteed the low temperature protection effect.
When the ball valve is used, the packing 3 is tightly attached to the valve rod 2 under the pressure of the gland 5 to realize sealing, and the driving sleeve 7 drives the valve rod 2 to rotate, so that the opening and closing of the ball valve can be controlled. The following is a detailed description of the components of the structure of the extension valve cover 6 of the low-temperature ball valve:
in order to meet the sealing requirement under the low-temperature working condition, the filler 3 is low-temperature-resistant filler; preferably, the low temperature resistant filler is a graphite filler or a PTFE filler.
The applicable temperature of the graphite filler is-200-800 ℃, the applicable temperature of the PTFE filler is-196-200 ℃, and both the graphite filler and the PTFE filler have good low temperature resistance and strong corrosion resistance.
The gland 5 is fixedly connected with the valve body 1 through a bolt 9, and a disc spring 10 for applying pressure to the gland 5 is arranged on the bolt 9.
Adopt bolt 9 to connect, can effectively guarantee the fixed effect of gland 5, and dismantle the convenience. And through suit dish spring 10 on bolt 9, dish spring 10 can provide a decurrent pretightning force for pack 3 is in compression state all the time, avoids it not hard up to influence the sealed effect of valve rod 2.
The top of the valve cover 6 is provided with a flange receiving disc 6a; further, a drip plate 11 is provided at the center of the valve cover 6.
The flange joint 6a is used for installing an actuator, in the embodiment, the flange joint 6a and the valve cover 6 are integrally formed, and the upper end face of the flange joint 6a is coaxially provided with a boss part which has a positioning function, so that the actuator can be conveniently installed, and the position precision is improved. The water dropping plate 11 is used for preventing the condensed water liquefied at low temperature from dropping to the cavity position in the valve body 1, and avoiding or reducing the corrosion to the cold insulation layer on the valve body 1.
The support 4 and the valve body 1 are detachably fixed, and the valve cover 6 and the support 4 are fixed in a welded mode.
In order to facilitate disassembly and assembly and maintenance, the driving sleeve 7 is detachably connected with the valve rod 2; preferably, the bottom of the driving sleeve 7 is provided with a groove portion 7a, the top of the valve rod 2 is provided with a key portion 2a, and the key portion 2a is in inserted fit with the groove portion 7a.
The heat-insulating layer 8 is a polyurethane layer, and has the advantages of low cost and good heat-insulating effect.
The present invention is not limited to the above specific embodiments, and for those skilled in the art, the above conception can be used without any creative work, and all the changes made fall within the protection scope of the present invention.
Claims (10)
1. A lengthened valve cover structure of a low-temperature ball valve is characterized by comprising
The valve comprises a valve body (1), wherein the top of the valve body is provided with a stuffing box (1 a), a valve rod (2) penetrates through the stuffing box (1 a), and a stuffing (3) is arranged between the stuffing box (1 a) and the valve rod (2);
the support (4) is fixed above the valve body (1), and a gland (5) for compressing the packing (3) is arranged in the support (4); and
the valve cover (6) is fixed above the support (4), a driving sleeve (7) connected with the valve rod (2) penetrates through the valve cover (6), and a heat insulation layer (8) is arranged between the valve cover (6) and the driving sleeve (7).
2. The extension valve cover structure of the low-temperature ball valve as claimed in claim 1, wherein the filler (3) is a low-temperature-resistant filler.
3. The extended length ball valve cover structure of claim 2, wherein the low temperature resistant filler is a graphite filler or a PTFE filler.
4. The extension valve cover structure of the low-temperature ball valve according to claim 2, characterized in that the gland (5) is fixedly connected with the valve body (1) through a bolt (9), and a disc spring (10) for applying pressure to the gland (5) is arranged on the bolt (9).
5. The extension valve cover structure of the low-temperature ball valve according to claim 1, characterized in that a flange (6 a) is arranged at the top of the valve cover (6).
6. The extension valve cover structure of the low-temperature ball valve according to claim 5, characterized in that a water dropping plate (11) is arranged in the middle of the valve cover (6).
7. The extension valve cover structure of the low-temperature ball valve according to claim 1, characterized in that the bracket (4) is detachably fixed with the valve body (1), and the valve cover (6) is welded and fixed with the bracket (4).
8. The extension valve cover structure of the cryogenic ball valve according to claim 1, wherein the driving sleeve (7) is detachably connected with the valve rod (2).
9. The extension valve cover structure of the low-temperature ball valve according to claim 8, wherein the bottom of the driving sleeve (7) is provided with a groove part (7 a), the top of the valve rod (2) is provided with a plug-in key part (2 a), and the plug-in key part (2 a) is in plug-in fit with the groove part (7 a).
10. The extension valve cover structure of the low-temperature ball valve according to claim 1, wherein the insulating layer (8) is a polyurethane layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916131.0U CN217874422U (en) | 2022-07-22 | 2022-07-22 | Low temperature ball valve extension valve gap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916131.0U CN217874422U (en) | 2022-07-22 | 2022-07-22 | Low temperature ball valve extension valve gap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217874422U true CN217874422U (en) | 2022-11-22 |
Family
ID=84054792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221916131.0U Active CN217874422U (en) | 2022-07-22 | 2022-07-22 | Low temperature ball valve extension valve gap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217874422U (en) |
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2022
- 2022-07-22 CN CN202221916131.0U patent/CN217874422U/en active Active
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