CN113202943A - Forced sealing valve sealed by valve rod bellows for deep cooling - Google Patents
Forced sealing valve sealed by valve rod bellows for deep cooling Download PDFInfo
- Publication number
- CN113202943A CN113202943A CN202110526440.0A CN202110526440A CN113202943A CN 113202943 A CN113202943 A CN 113202943A CN 202110526440 A CN202110526440 A CN 202110526440A CN 113202943 A CN113202943 A CN 113202943A
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- Prior art keywords
- valve
- rod
- bellows
- fixedly connected
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000012856 packing Methods 0.000 claims description 31
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
- F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
- F16K41/106—Spindle sealings with diaphragm, e.g. shaped as bellows or tube for use with rotating spindles or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to the technical field of ball valves, in particular to a forced sealing valve sealed by a valve rod corrugated pipe for deep cooling, which comprises a valve cover, a valve rod, a ball body, a valve body and a valve seat, wherein the valve cover is fixedly connected to the valve body; the connecting mechanism comprises a limiting pin and a spiral guide rail, the spiral guide rail is arranged on the valve rod, the limiting pin is fixedly connected with the ball body, and the limiting pin is arranged on the spiral guide rail in a sliding manner; the valve cover is internally provided with a corrugated pipe, the corrugated pipe is sleeved on the valve rod, one end of the corrugated pipe is fixedly connected with the valve rod, the other end of the corrugated pipe is provided with a sealing mechanism, and the valve rod is provided with a limiting mechanism. The invention has the advantage of eliminating the problem that the use safety is influenced by abnormal pressure rise of the cavity medium in the valve.
Description
Technical Field
The invention relates to the technical field of ball valves, in particular to a forced sealing valve sealed by a valve rod corrugated pipe for deep cooling.
Background
A by class valve such as super low temperature ball valve, gate valve for under the cryrogenic operating mode, there is confined lumen during the closed condition, along with ambient temperature's improvement gradually, the low temperature liquefied natural gas of lumen will take place the gasification along with the rising of temperature, and the volume increases 600 times about, and pressure can increase rapidly, will cause serious accident if the unable discharge of pressure, consequently adopts two kinds of methods of inside discharge and outside discharge for avoiding unusual pressure boost when the design.
(1) The internal drainage is to communicate the valve middle cavity with the pipeline inlet end through a drainage hole, so that the pressure of the middle cavity is always balanced with the pipeline inlet end, the drainage hole of the gate valve flashboard is shown in figure 1, 11 in the figure is a cavity, 12 is a flashboard, 13 is a drainage hole, 14 is a valve body, the drainage hole of the ball valve ball body is shown in figure 2, 21 in the figure is a cavity, 22 is a drainage hole, 23 is a valve body, 24 is a valve seat, and 25 is a ball body; or the inlet end adopts an elastic valve seat or a pressure relief hole to connect the middle cavity and the pipeline inlet end, as shown in fig. 3, in the figure, 31 is a cavity, 32 is a flashboard, 33 is a valve body, 34 is a relief hole, and 35 is a valve seat, when the middle cavity pressure reaches the set safe relief pressure, the middle cavity medium is relieved into the inlet pipeline. The external discharge is to install a relief valve on the middle cavity valve body, when the middle cavity pressure reaches the discharge pressure, the middle cavity medium is discharged outside the valve body or collected in the gas cylinder of discharging, (2) the valve rod of the cryogenic valve is only sealed by the packing with the external world, in order to guarantee the normal use of packing, the long neck valve cover structure convenient for cold insulation is generally designed according to different design temperature requirements, so as to guarantee that the temperature of the packing position keeps in the operable range of the valve rod above 0 ℃.
The disadvantages of this structure are: the design of inside bleeder hole makes the original intention of cryrogenic ball valve and the two disk seats of gate valve two-way seal lose meaning, and sealed can only seal through low reaches disk seat. The principle of pressure relief through the area difference in the double-valve seat structure of the cryogenic ball valve also has uncertainty in practical application. Although pressure relief can be achieved by the external relief valve, external leakage points of the valve body are increased at the same time. The ultralow temperature valve used under the cryogenic working condition has the potential possibility of medium leakage after the packing is worn and failed by the valve rod. And the design of heightening the valve cover increases the cost of the valve cover.
Disclosure of Invention
The invention aims to solve the defect that the use safety is affected due to abnormal pressure rise of a medium in the prior art, and provides a forced sealing valve for sealing a valve rod bellows for deep cooling.
In order to achieve the purpose, the invention adopts the following technical scheme:
the forced sealing valve comprises a valve cover, a valve rod, a ball body, a valve body and a valve seat, wherein the valve cover is fixedly connected with the valve body, the valve body is fixedly connected with the valve cover, an executing mechanism is arranged at the upper end of the valve rod, the lower end of the valve rod extends into the ball body, a connecting mechanism is arranged between the valve rod and the ball body, and the valve body is fixedly connected with the valve seat;
the connecting mechanism comprises a limiting pin and a spiral guide rail, the spiral guide rail is arranged on the valve rod, the limiting pin is fixedly connected with the ball body, and the limiting pin is arranged on the spiral guide rail in a sliding manner;
the valve comprises a valve cover, a valve rod and a corrugated pipe, wherein the valve cover is provided with a valve rod, the corrugated pipe is sleeved on the valve rod, one end of the corrugated pipe is fixedly connected with the valve rod, the other end of the corrugated pipe is provided with a sealing mechanism, and the valve rod is provided with a limiting mechanism.
Preferably, the sealing mechanism comprises a filler, a packing gasket and a packing box, the packing box is fixedly connected with the corrugated pipe and the valve cover, the packing gasket is arranged in the packing box, and the packing is filled in the packing box.
Preferably, actuating mechanism includes support, threaded rod, hand wheel, nut, support fixed connection be in on the valve cap, nut fixed connection be in on the support, threaded rod one end with nut threaded connection, the threaded rod other end pass through the bearing with the valve rod rotates and connects, hand wheel fixed connection be in on the threaded rod.
Preferably, the bearing adopted between the threaded rod and the valve rod is a thrust ball bearing.
Preferably, the limiting mechanism comprises a guide groove and a guide pin, the guide pin is connected to the support through a detachable mechanism, the guide groove is formed in the valve rod, and the guide pin is inserted into the guide groove.
Preferably, the detachable mechanism comprises a threaded hole and a plug screw sleeve, the threaded hole is formed in the support, the plug screw sleeve is in threaded connection with the threaded hole, and the plug screw sleeve is fixedly connected with the guide pin.
The forced sealing valve for valve rod bellows seal for deep cooling provided by the invention has the beneficial effects that: the design of the single valve seat of the valve avoids the phenomenon of material accumulation in the inner cavity of the double-valve seat valve and solves the problem that the use safety is affected due to abnormal pressure rise of the medium in the middle cavity of the valve. Meanwhile, the valve seat and the valve body are welded to improve the sealing reliability, the upper part of the corrugated pipe is welded with the stuffing box, the lower part of the corrugated pipe is welded with the valve rod, so that a medium in the valve body is isolated from the outside, and the stuffing on the upper part of the valve rod forms a secondary seal, so that the valve is safer and more reliable to seal. Meanwhile, the manufacturing cost of the cryogenic valve can be saved by reducing the height of the valve cover.
Drawings
FIG. 1 is a schematic structural view of a relief hole of a gate plate of a gate valve in the prior art;
FIG. 2 is a schematic view of a ball relief hole of a prior art ball valve;
FIG. 3 is a schematic view of a prior art seat bleed configuration;
FIG. 4 is a schematic diagram of a forced sealing valve for a valve stem bellows seal for deep cooling according to the present invention;
FIG. 5 is a schematic structural diagram of a spiral guide rail part of a forced sealing valve sealed by a valve stem bellows for deep cooling according to the invention;
FIG. 6 is an enlarged view of part A of FIG. 4 of a forced sealing valve for a valve stem bellows seal for deep cooling according to the present invention.
In the figure: the packing 41, the packing pad 42, the packing box 43, the corrugated pipe 44, the valve cover 45, the limit pin 46, the valve rod 47, the ball 48, the valve body 49, the valve seat 50, the guide groove 51, the guide pin 52, the bracket 53, the spiral guide rail 54, the threaded rod 55, the hand wheel 56, the nut 57, the threaded hole 58 and the plug screw sleeve 59.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 4-6, a forced sealing valve sealed by a valve rod bellows for deep cooling comprises a valve cover 45, a valve rod 47, a ball 48, a valve body 49 and a valve seat 50, wherein the valve cover 45 is fixedly connected to the valve body 49, the valve body 49 is fixedly connected to the valve cover 45, an execution mechanism is arranged at the upper end of the valve rod 47, the lower end of the valve rod 47 extends into the ball 48, a connection mechanism is arranged between the valve rod 47 and the ball 48, the valve body 49 is fixedly connected with the valve seat 50, the valve seat 50 is a one-way valve seat, the danger of abnormal pressure rise of a middle cavity of the double-valve seat valve is avoided, the valve seat 50 and the ball 48 are assembled and ground, then are arranged in the valve body 49 and are welded with the valve body, the medium is prevented from leaking between the valve seat 50 and the valve body 49, and the sealing reliability is improved.
The connecting mechanism comprises a limiting pin 46 and a spiral guide rail 54, the spiral guide rail 54 is arranged on the valve rod 47, the limiting pin 46 is fixedly connected with the ball body 48, the limiting pin 46 can be arranged on the spiral guide rail 54 in a sliding mode, the torsion degree of the spiral guide rail 54 is 90 degrees, when the valve is opened, the valve rod 47 is driven by a hand wheel 56 to ascend along the guide groove 51, at the moment, the ball body 48 swings to one side far away from the sealing surface for certain displacement under the action of the limiting pin 46 and the spiral guide rail 54, and the sealing surface of the ball body 48 is separated from the sealing surface of the valve seat 50; meanwhile, when the valve rod 47 is lifted to the designed distance, the ball 48 will also rotate 90 degrees along with the spiral guide 54, thus completing the opening process of the valve. When the valve is closed, the motion tracks of the valve rod 47 and the ball body 48 are opposite to the situation, and the ball body 48 is designed in a swing mode, so that the switch between the ball body 48 and the valve seat 40 has no friction, and the opening and closing torque of the valve is reduced.
Be provided with bellows 44 in the valve gap 45, bellows 44 cover is established on valve rod 47, bellows 44 one end and valve rod 47 fixed connection, the bellows 44 other end is provided with sealing mechanism, be provided with stop gear on the valve rod 47, sealing mechanism includes packing 41, packing pad 42, packing box 43 and bellows 44 and valve gap 45 fixed connection, packing pad 42 sets up in packing box 43, packing box 43 intussuseption is filled with packing 41, form primary seal through bellows 44, make the medium in the valve body and outside isolated, prevent low temperature medium seepage to the packing department, guarantee that the temperature at packing position keeps more than 0 ℃ under the cryrogenic operating mode, play sealed effect through the design that adopts sealing mechanism, with prevent that the medium from leaking outward.
Actuating mechanism includes support 53, threaded rod 55, hand wheel 56, nut 57, support 53 fixed connection is on valve gap 45, nut 57 fixed connection is on support 53, threaded rod 55 one end and nut 57 threaded connection, the threaded rod 55 other end passes through the bearing and is connected with valve rod 47 rotation, hand wheel 56 fixed connection is on threaded rod 55, the bearing that adopts between threaded rod 55 and the valve rod 47 is thrust ball bearing, when hand wheel 56 rotates, will drive threaded rod 55 and rotate, thereby adjust the height of threaded rod 55, make threaded rod 55 drive valve rod 47 and remove, make spiral guide 54 remove, lead to spacer pin 46 to rotate under spiral guide 54's effect, thereby drive spheroid 48 and rotate.
Limiting mechanism includes guide way 51, uide pin 52 passes through detachable construction and connects on support 53, the guide way 51 has been seted up on the valve rod 47, uide pin 52 is inserted and is established in guide way 51, detachable construction includes screw hole 58, plug screw cover 59, screw hole 58 is seted up on support 53, plug screw cover 59 and screw hole 58 threaded connection, plug screw cover 59 and uide pin 52 fixed connection, through the cooperation that adopts guide way 51 and uide pin 52, the position when reciprocating valve rod 47 carries out spacingly, valve rod 47 emergence pivoted condition has been avoided, so as to guarantee opening completely and closing of valve, simultaneously through adopting screw hole 58, plug screw cover 59's design so that dismantle uide pin 52, remove the spacing to valve rod 47, so as to maintain valve rod 47.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A forced sealing valve sealed by a valve rod corrugated pipe for deep cooling comprises a valve cover (45), a valve rod (47), a ball body (48), a valve body (49) and a valve seat (50), and is characterized in that the valve cover (45) is fixedly connected to the valve body (49), the valve body (49) is fixedly connected to the valve cover (45), an execution mechanism is arranged at the upper end of the valve rod (47), the lower end of the valve rod (47) extends into the ball body (48), a connecting mechanism is arranged between the valve rod (47) and the ball body (48), and the valve body (49) is fixedly connected with the valve seat (50);
the connecting mechanism comprises a limiting pin (46) and a spiral guide rail (54), the spiral guide rail (54) is arranged on the valve rod (47), the limiting pin (46) is fixedly connected with the ball body (48), and the limiting pin (46) is slidably arranged on the spiral guide rail (54);
be provided with bellows (44) in valve gap (45), bellows (44) cover is established on valve rod (47), bellows (44) one end with valve rod (47) fixed connection, the bellows (44) other end is provided with sealing mechanism, be provided with stop gear on valve rod (47).
2. A forced sealing valve for valve stem bellows sealing for deep cooling according to claim 1, characterized in that said sealing mechanism comprises a packing (41), a packing gasket (42), a packing box (43), said packing box (43) being fixedly connected with said bellows (44) and said valve cover (45), said packing gasket (42) being arranged inside said packing box (43), said packing box (43) being filled with said packing (41).
3. The forced sealing valve for valve stem bellows seal for deep cooling according to claim 1, characterized in that said actuator comprises a bracket (53), a threaded rod (55), a hand wheel (56), and a nut (57), said bracket (53) is fixedly connected to said valve cover (45), said nut (57) is fixedly connected to said bracket (53), one end of said threaded rod (55) is in threaded connection with said nut (57), the other end of said threaded rod (55) is rotatably connected to said valve stem (47) through a bearing, and said hand wheel (56) is fixedly connected to said threaded rod (55).
4. A forced sealing valve for valve stem bellows sealing for deep cooling according to claim 3, characterized in that the bearing used between the threaded rod (55) and the valve stem (47) is a thrust ball bearing.
5. The forced sealing valve for valve stem bellows seal for deep cooling according to claim 3, wherein said limiting mechanism comprises a guide groove (51) and a guide pin (52), said guide pin (52) is connected to said bracket (53) by a detachable mechanism, said valve stem (47) has a guide groove (51) formed therein, and said guide pin (52) is inserted into said guide groove (51).
6. A positive sealing valve for stem bellows sealing for deep cooling according to claim 5, characterized in that said detachable means comprises a threaded hole (58), a plug screw (59), said threaded hole (58) opening onto said bracket (53), said plug screw (59) being in threaded connection with said threaded hole (58), said plug screw (59) being in fixed connection with said guide pin (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526440.0A CN113202943A (en) | 2021-05-14 | 2021-05-14 | Forced sealing valve sealed by valve rod bellows for deep cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526440.0A CN113202943A (en) | 2021-05-14 | 2021-05-14 | Forced sealing valve sealed by valve rod bellows for deep cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113202943A true CN113202943A (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526440.0A Pending CN113202943A (en) | 2021-05-14 | 2021-05-14 | Forced sealing valve sealed by valve rod bellows for deep cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508626A (en) * | 2022-03-08 | 2022-05-17 | 铜陵山海智能制造有限公司 | Heat preservation type valve rod and using method thereof |
-
2021
- 2021-05-14 CN CN202110526440.0A patent/CN113202943A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508626A (en) * | 2022-03-08 | 2022-05-17 | 铜陵山海智能制造有限公司 | Heat preservation type valve rod and using method thereof |
| CN114508626B (en) * | 2022-03-08 | 2024-03-29 | 铜陵山海智能制造有限公司 | Thermal insulation valve rod and use method thereof |
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Effective date of registration: 20231213 Address after: 363900 No.1 Shunda Road, Gunong Farm, Changtai District, Zhangzhou City, Fujian Province Applicant after: Fujian Huishang Technology Co.,Ltd. Address before: 363900 Yintang Industrial Zone, Gu Nong farm, Changtai County, Zhangzhou City, Fujian Province Applicant before: DATONG RECIPROCITY GROUP CO.,LTD. |