CN109386628B - Valve for natural gas transportation - Google Patents
Valve for natural gas transportation Download PDFInfo
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- CN109386628B CN109386628B CN201811581061.6A CN201811581061A CN109386628B CN 109386628 B CN109386628 B CN 109386628B CN 201811581061 A CN201811581061 A CN 201811581061A CN 109386628 B CN109386628 B CN 109386628B
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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
- F16K35/00—Means to prevent accidental or unauthorised actuation
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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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/06—Devices for relieving the pressure on the sealing faces for taps or cocks
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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
- F16K5/061—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 knee-joint
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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
- F16K5/0647—Spindles or actuating means
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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
- F16K5/0689—Packings between housing and plug
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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
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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
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a valve for natural gas transportation, which relates to the technical field of valves and at least comprises a valve seat, a valve ball arranged in the valve seat, a valve rod used for driving the valve ball to rotate, an air inlet connecting pipe arranged on one side of the valve seat and an air outlet connecting pipe arranged on the other side of the valve seat, wherein two sides of the valve ball are respectively clamped and positioned through a positioning seat, first sealing rings attached to the outer wall of the valve ball are respectively arranged on one sides of the two positioning seats facing the valve ball, a valve rod through hole is arranged on the upper side of the valve seat in a penetrating way and penetrates through the inner wall and the outer wall of the valve seat, the valve rod is positioned in the valve rod through hole, a pipe cavity of the air inlet connecting pipe comprises. The invention provides a valve for natural gas transportation, which can prevent a valve ball from floating to cause leakage, and aims to solve the problem that the existing valve for natural gas transportation is easy to cause leakage due to the floating of the valve ball in the using process.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a valve for natural gas transportation.
Background
The valve for natural gas transportation is generally a ball valve, and the ball valve for natural gas has higher requirement on sealing performance compared with a ball valve for water, and can cause greater harm if leakage occurs in the use process.
In the existing ball valve structure, the valve ball is floating, when the ball valve in use is in a closed state, the air pressure on one side of the valve ball is larger than that on the other side, the valve ball can deviate towards the side with small air pressure, natural gas is easy to leak from the sealing ring on the side with small air pressure, and the natural gas is prevented from leaking by the sealing structure on the valve rod.
Meanwhile, the valve rod is positioned on the valve seat and can only rotate in the positioning hole, and the valve rod cannot adapt to the deviation of the valve ball. When the valve ball is deflected, the end of the valve stem that is connected to the valve ball is subjected to a transverse shear stress. This shear stress tends to damage the seal between the valve stem and the valve stem locating hole, thereby causing leakage in the ball valve.
Disclosure of Invention
The invention provides a valve for natural gas transportation, which can prevent a valve ball from floating to cause leakage, and aims to solve the problem that the existing valve for natural gas transportation is easy to cause leakage due to the floating of the valve ball in the using process.
In order to achieve the purpose, the invention adopts the following technical scheme: a valve for natural gas transportation at least comprises a valve seat, a valve ball arranged in the valve seat, a valve rod for driving the valve ball to rotate, an air inlet connecting pipe arranged on one side of the valve seat and an air outlet connecting pipe arranged on the other side of the valve seat, wherein two sides of the valve ball are respectively clamped and positioned through a positioning seat, first sealing rings attached to the outer wall of the valve ball are arranged on two positioning seats on one sides facing the valve ball, a valve rod through hole is formed in the upper side of the valve seat and penetrates through the inner wall and the outer wall, the valve rod is positioned in the valve rod through hole,
The pipe cavity of the air inlet connecting pipe comprises a transverse channel and a longitudinal channel, the upper end of the longitudinal channel is a piston accommodating cavity, the lower end of the longitudinal channel is an air inlet of the valve, one end of the transverse channel is communicated with one end of the valve seat, and the other end of the transverse channel is communicated with the longitudinal channel;
The piston is slidably arranged in the piston sleeve, the piston is divided into an upper external thread section, a sealing section and a lower external thread section from top to bottom, the diameters of the upper external thread section and the lower external thread section are smaller than those of the sealing section, an upper internal thread section matched with the upper external thread section in a screwed mode is arranged at the top of a tube hole of the piston sleeve, and a lower internal thread section matched with the lower external thread section in a screwed mode is arranged at the bottom of the tube hole of the piston sleeve;
The valve further comprises a detachable piston driving rod and a detachable sealing cover, a driving rod through hole is formed in the pipe wall of the air inlet connecting pipe, the central axis of the driving rod through hole coincides with the central axis of the piston sleeve, the piston driving rod can penetrate through the driving rod through hole to be connected with the top of the piston, the piston driving rod and the driving rod through hole are in sliding sealing fit, a sealing boss is arranged on the outer ring of the driving rod through hole, and the sealing boss and the sealing cover are fixed through threads.
Preferably, the lower end of the piston driving rod is provided with a start head with a regular hexagonal cross section, the top of the piston is provided with a hexagonal counter bore which can be clamped with the start head at the lower end of the piston driving rod, and a longitudinal anti-falling structure is further arranged between the piston driving rod and the piston.
preferably, the outer wall of the piston sleeve is provided with a convex reinforcing rib.
Preferably, a double-joint universal joint is arranged in the valve seat, the lower section of the valve rod is positioned in the valve rod through hole, the valve rod and the valve rod through hole are in rotary sealing fit through a rotary sealing mechanism, a universal joint positioning hole is formed in the lower end of the valve rod, the double-joint universal joint is longitudinally arranged and sequentially divided into an upper joint, a middle joint and a lower joint from top to bottom, the upper section of the upper joint slidably extends into the universal joint positioning hole in the lower end of the valve rod, and the upper joint and the universal joint positioning hole cannot rotate relatively; the lower end of the lower section is connected with the top of the valve ball and can drive the valve ball to rotate.
preferably, a sliding seat is arranged in an inner hole of the valve seat between the two positioning seats, the sliding seat is in a horizontal cylindrical shape, the outer wall of the sliding seat is in sliding sealing fit with the inner wall of the valve seat, the valve ball is arranged in a tube hole of the sliding seat, a second sealing ring for clamping and tightly sealing the valve ball and a limiting ring for positioning the second sealing ring are arranged on two sides of the inner wall of the tube hole of the sliding seat, and a through hole for allowing the double-joint universal joint to pass through is formed in the tube wall of the sliding seat.
Preferably, the valve rod sealing mechanism comprises a positioning sleeve and an inflating sealing ring, the positioning sleeve is coaxially embedded in the valve rod through hole, the valve rod is in rotary sealing fit with the valve rod through hole through the positioning sleeve, a plurality of O-shaped sealing rings are sleeved on the valve rod, and the O-shaped sealing rings are in rotary sealing fit with the inner wall of the positioning sleeve; the inner wall of the positioning sleeve is annularly provided with a sealing ring limiting groove, and the inflatable sealing ring is arranged in the sealing ring limiting groove and annularly arranged on the outer side of the valve rod; an inflation channel is arranged in the positioning sleeve, one end of the inflation channel is communicated with the inflation sealing ring, and the other end of the inflation channel is communicated to an inner cavity of a valve rod through hole below the valve rod.
Therefore, the invention has the following beneficial effects: 1. the piston sleeve and the piston are arranged, when the ball valve is in a closed state, the air inlet connecting pipe can be isolated into an independent sealed cavity, the pressure on the air inlet side of the valve ball is reduced, and the valve ball is prevented from deviating; 2. the valve rod and the valve ball are indirectly connected through the double-joint universal joint, the valve rod can drive the valve ball to rotate, the valve rod can adapt to the floating of the valve ball, and the valve rod cannot be subjected to transverse shear stress, so that a sealing structure between the valve rod and a valve rod positioning hole is protected; 3. the valve ball is positioned in a sliding seat, a second sealing ring is arranged between the sliding seat and the valve ball, and when leakage occurs between the valve ball and the first sealing ring on the positioning seat, the valve ball can still be sealed through the second sealing ring on the sliding seat; 4. be provided with the rotation axis on the sliding seat, the rotation axis is used for supplementary valve ball location for the valve ball can only be followed vertical axis and made rotatoryly, more does benefit to the valve rod and drives the valve ball rotatory.
drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the piston sleeve of the present invention.
Fig. 3 is a cross-sectional view of a piston sleeve of the present invention.
Fig. 4 is a schematic view of the piston structure of the present invention.
fig. 5 is a schematic structural view of the present invention in a closed state.
Fig. 6 is an enlarged view at a in fig. 1.
Fig. 7 is a cross-sectional view of the positioning seat and the first seal ring of the present invention.
FIG. 8 is a schematic view of the construction of a double-jointed gimbal according to the present invention.
Fig. 9 is a sectional view of the sliding seat in the present invention.
Fig. 10 is a schematic view of the sliding seat of the present invention.
FIG. 11 is a schematic view of the valve stem according to the first embodiment.
Figure 12 is a cross-sectional view of the inner and outer sleeves of the present invention.
FIG. 13 is a schematic view of the valve stem of the first embodiment after installation.
Fig. 14 is a partial sectional view of the second embodiment.
Fig. 15 is an enlarged view at b in fig. 14.
FIG. 16 is a schematic view showing the structure of a valve stem according to the second embodiment.
Fig. 17 is a schematic structural view of a lifting ring in the second embodiment.
FIG. 18 is a partial sectional view of a third embodiment.
Fig. 19 is an enlarged view at c in fig. 18.
FIG. 20 is a partial sectional view of the fourth embodiment.
Fig. 21 is an enlarged view at d in fig. 20.
1: a valve seat; 101: positioning the boss; 2: a valve ball; 3: an air inlet connecting pipe; 301: a transverse channel; 302: a longitudinal channel; 303: an air inlet; 304: a piston sleeve; 305: a piston; 306: an upper external thread section; 307: a sealing section; 308: a lower external thread section; 309: an upper internal thread section; 310: a lower internal thread section; 311: a piston drive rod; 312: a sealing cover; 313: a drive rod through hole; 314: sealing the boss; 315: reinforcing ribs; 316: starting; 317: a hexagonal counter bore; 318: opening a hole; 4: an air outlet connecting pipe; 5: positioning seats; 501: a first seal ring; 6: a valve stem through hole; 7: a valve stem; 701: positioning holes of the universal joint; 702: positioning the chuck; 703: an upper sealing ring; 704: a lower seal ring; 705: an O-shaped sealing ring; 8: a double-joint universal joint; 801: an upper section; 802: a middle section; 803: a lower section; 9: a sliding seat; 901: a second seal ring; 902: a limiting ring; 903: a through hole; 904: a rotating shaft; 10: an inner sleeve; 1001: an inner cylinder; 1002: a lower sealing plate; 11: an outer sleeve; 1101: an outer cylinder; 1102: an upper sealing plate; 12: a valve stem locking mechanism; 1201: a positioning sleeve; 1202: a lifting ring; 1203: a slideway; 1204: an air pressure channel; 1205: a guide bar; 1206: a slider; 1207: a compression spring; 1208: a lower end surface ratchet wheel; 1209: an upper end surface ratchet wheel; 13: a valve stem sealing mechanism; 1301: an inflatable seal ring; 1302: a sealing ring limiting groove; 1303: and an inflation channel.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example one
Referring to fig. 1 to 13, the valve for transporting natural gas according to this embodiment at least includes a valve seat 1, a valve ball 2 disposed in the valve seat 1, a valve rod 7 for driving the valve ball 2 to rotate, an air inlet connecting pipe 3 disposed on one side of the valve seat 1, and an air outlet connecting pipe 4 disposed on the other side of the valve seat 1, two sides of the valve ball 2 are respectively clamped and positioned by a positioning seat 5, a first sealing ring 501 attached to an outer wall of the valve ball 2 is disposed on each of two positioning seats 5 facing the valve ball 2, a valve rod through hole 6 is arranged on the upper side of the valve seat 1 through the inner wall and the outer wall, the valve rod 7 is positioned in the valve rod through hole 6, the tube cavity of the air inlet connecting tube 3 comprises a transverse channel 301 and a longitudinal channel 302, the upper end of the longitudinal channel 302 is a piston accommodating cavity, the lower end is an air inlet 303 of a valve, one end of the transverse channel 301 is communicated with one end of the valve seat 1, and the other end is communicated with the longitudinal channel 302.
A piston sleeve 304 and a piston 305 are arranged in the longitudinal channel 302, the outer wall of the piston sleeve 304 is attached, sealed and fixed with the inner wall of the longitudinal channel 302, an opening 318 communicated with the transverse channel 301 is formed in the pipe wall of the piston sleeve 304, a convex reinforcing rib 315 is arranged on the outer wall of the piston sleeve 304, and the reinforcing rib 315 is used for assisting the fixation of the outer wall of the piston sleeve 304 and the inner wall of the longitudinal channel 302. The piston 305 is slidably disposed in the piston sleeve 304 and can slide up and down in the opening 318, the piston 305 is divided into an upper external thread section 306, a sealing section 307 and a lower external thread section 308 from top to bottom, the diameters of the upper external thread section 306 and the lower external thread section 308 are smaller than the diameter of the sealing section 307, an upper internal thread section 309 which is in threaded fit with the upper external thread section 306 is disposed at the top of the tube hole of the piston sleeve 304, and a lower internal thread section 310 which is in threaded fit with the lower external thread section 308 is disposed at the bottom of the tube hole of the piston sleeve 304.
The valve further comprises a detachable piston driving rod 311 and a detachable sealing cover 312, a driving rod through hole 313 is formed in the pipe wall of the air inlet connecting pipe 3, the central axis of the driving rod through hole 313 coincides with the central axis of the piston sleeve 304, the piston driving rod 311 can penetrate through the driving rod through hole 313 to be connected with the top of the piston 305, the piston driving rod 311 and the driving rod through hole 313 are in sliding sealing fit, a sealing boss 314 is arranged on the outer ring of the driving rod through hole 313, and the sealing boss 314 and the sealing cover 312 are fixed through threads.
The lower end of the piston driving rod 311 is provided with a starting head 316 with a regular hexagonal cross section, the top of the piston 305 is provided with a hexagonal counter bore 317 which can be clamped with the starting head at the lower end of the piston driving rod 311, a longitudinal anti-falling structure is further arranged between the piston driving rod 311 and the piston 305, and the longitudinal anti-falling structure can be a magnetic attraction structure or a clamping structure.
When the valve is used in communication, the piston 305 is located on the upper portion of the piston sleeve 304, and the upper external thread section 306 on the upper portion of the piston 305 is screwed and fixed with the upper internal thread section 309 on the upper portion of the piston sleeve 304.
When the valve needs to be closed and the pipeline needs to be disconnected, the valve ball 2 is rotated to a closed state, the piston driving rod 311 is connected with the top of the piston 305 through the driving rod through hole 313, the piston 305 is rotated, the upper external thread section 306 on the upper portion of the piston 305 is separated from the upper internal thread section 309 on the upper portion of the piston sleeve 304, and the piston 305 is pressed downwards, so that the piston 305 moves from the upper portion of the opening hole 318 on the piston sleeve 304 to the lower portion of the opening hole 318. At this time, the cavity of the inlet connecting pipe 3 between the piston 305 and the valve ball 2 forms a sealed cavity. The piston 305 moves downwards continuously, the sealed cavity expands, the air pressure in the cavity is reduced, the force applied to the valve ball 2 on the side is reduced, floating deviation is not easy to occur, and the possibility that natural gas leaks from the joint between the valve ball 2 and the first sealing ring 501 is reduced.
the valve seat 1 is further provided with a double-joint universal joint 8, the lower section of the valve rod 7 is located in the valve rod through hole 6, and the valve rod 7 and the valve rod through hole 6 are in rotary sealing fit through a rotary sealing mechanism, the rotary sealing mechanism is characterized in that a plurality of O-shaped sealing rings 705 are sleeved on the valve rod 7, and the O-shaped sealing rings 705 are in rotary sealing fit with the valve rod through hole 6. The lower end of the valve rod 7 is provided with a universal joint positioning hole 701, the double-joint universal joint 8 is longitudinally arranged and sequentially divided into an upper joint 801, a middle joint 802 and a lower joint 803 from top to bottom, the upper section of the upper joint 801 slidably extends into the universal joint positioning hole 701 at the lower end of the valve rod 7, and the upper joint 801 and the universal joint positioning hole 701 cannot rotate relatively; the lower end of the lower joint 803 is fixedly connected with the top of the valve ball 2, and the valve rod 7 can drive the valve ball 2 to rotate through the double-joint universal joint 8.
A sliding seat 9 is arranged in an inner hole of the valve seat 1 between the two positioning seats 5, the sliding seat 9 is in a horizontal cylindrical shape, the outer wall of the sliding seat 9 is in sliding sealing fit with the inner wall of the valve seat 1, the sliding seat 9 can transversely move left and right on the valve seat 1, the valve ball 2 is arranged in a pipe hole of the sliding seat 9, a second sealing ring 901 for clamping the valve ball 2 tightly and a limiting ring 902 for positioning the second sealing ring 901 are arranged on two sides of the inner wall of the pipe hole of the sliding seat 9, and a through hole 903 for allowing the double-joint universal joint 8 to pass through is formed in the pipe wall of the sliding seat 9. The bottom of the valve ball 2 is provided with a rotary positioning hole, a rotary shaft 904 matched with the rotary positioning hole is arranged in the hole of the sliding seat 9, the rotary shaft 904 is arranged on the sliding seat 9, and the rotary shaft 904 is used for assisting the positioning of the valve ball 2, so that the valve ball 2 can only rotate along a vertical axis, and the valve rod 7 is more beneficial to driving the valve ball 2 to rotate.
a positioning chuck 702 is circumferentially arranged on the outer wall of the valve rod 7, a positioning boss 101 is arranged on the valve seat 1 positioned on the outer side of the through hole 6 of the valve rod, an inner sleeve 10 is clamped outside the positioning boss 101, an outer sleeve 11 is clamped outside the inner sleeve 10, the inner sleeve 10 comprises an inner cylinder 1001 which is longitudinally arranged and a lower sealing plate 1002 which is positioned at the top of the inner cylinder 1001 and extends inwards and horizontally in a turnover manner, and the inner cylinder 1001 is hermetically sleeved on the outer side of the positioning boss 101; the outer sleeve 11 comprises an outer cylinder 1101 arranged longitudinally and an upper sealing plate 1102 located at the top of the outer cylinder 1101 and extending inwards and horizontally in a folding mode, the outer cylinder 1101 is sealed and connected to the outer side of the inner cylinder 1001, the upper sealing plate 1102 is located above the lower sealing plate 1002, and the positioning chuck 702 is located between the upper sealing plate 1102 and the lower sealing plate 1002. An upper sealing ring 703 is arranged between the upper surface of the positioning chuck 702 and the lower surface of the upper sealing plate 1102, and a lower sealing ring 704 is arranged between the lower surface of the positioning chuck 702 and the upper surface of the upper sealing plate 1102.
This embodiment is connected indirectly through double-joint universal joint 8 between with valve rod 7 and the valve ball 2, can drive the valve ball 2 rotation through valve rod 7, can let valve rod 7 adapt to the valve ball 2 again and float, and valve rod 7 can not receive horizontal shear stress, prevents that the seal structure of valve rod 7 department from being destroyed. When the valve ball 2 deviates left and right in the use process, the lower joint 803 of the double-joint universal joint 8 can move horizontally along with the valve ball 2, and the upper joint 801 can slide up and down in the universal joint positioning hole 701 at the lower end of the valve rod 7 through the hinged connection of the two ends of the middle joint 802 so as to adapt to the deviation of the valve ball 2.
Still another reason why the leakage occurs in the ball valve stem 7 is that when the valve ball 2 in the closed state is displaced, the sealing performance between the valve ball 2 and the first seal 501 on the side where the air pressure is large is deteriorated, and natural gas easily leaks from the position into the stem through-hole 6. This embodiment is fixed a position valve ball 2 in a sliding seat 9, be sliding seal cooperation between 9 outer walls of sliding seat and the 1 inner wall of disk seat, and be equipped with second sealing washer 901 between sliding seat 9 and the valve ball 2, when taking place to leak between first sealing washer 501 on valve ball 2 and the positioning seat 5, still can realize sealing through second sealing washer 901 on the sliding seat 9 to valve ball 2, prevent that the natural gas from entering into valve rod through hole 6 in, further reduced the possibility that the natural gas leaked from valve rod 7.
Meanwhile, the positioning chuck 702 which is integrally formed is arranged on the outer wall of the valve rod 7 in the circumferential direction, and a sealing structure is arranged between the upper surface and the lower surface of the positioning chuck 702 and between the inner sleeve 10 and the outer sleeve 11, so that even natural gas leaks into the through hole 6 of the valve rod, the natural gas cannot leak out of the ball valve from the valve rod 7, and the use safety of the ball valve is further improved.
Example two
referring to fig. 14 to 17, the present embodiment further improves the following on the basis of the first embodiment:
The valve rod locking mechanism 12 comprises a positioning sleeve 1201 and a lifting ring 1202, the positioning sleeve 1201 is coaxially embedded in the valve rod through hole 6, the valve rod 7 is in rotary sealing fit with the valve rod through hole 6 through the positioning sleeve 1201, a plurality of O-shaped sealing rings 705 are sleeved on the valve rod 7, and the O-shaped sealing rings 705 are in rotary sealing fit with the inner wall of the positioning sleeve 1201; a plurality of slide ways 1203 and a plurality of air pressure channels 1204 are arranged in the positioning sleeve 1201, the slide ways 1203 correspond to the air pressure channels 1204 one by one, the slide ways 1203 are vertically arranged, an opening at the upper end of the slide ways 1203 is positioned on the end surface of the top of the positioning sleeve 1201, an opening at the lower end of the slide ways is communicated with one end of the corresponding air pressure channel 1204, and the other end of the air pressure channel 1204 is communicated with an inner cavity of a valve; the lifting ring 1202 is transversely arranged right above the positioning sleeve 1201, a plurality of guide rods 1205 are arranged on the lower side of the lifting ring 1202, sliding blocks 1206 are arranged at the lower ends of the guide rods 1205, the sliding blocks 1206 are in one-to-one correspondence with the sliding ways 1203, and the sliding blocks 1206 are arranged in the sliding ways 1203 and are in sliding sealing fit with the corresponding sliding ways 1203; a compression spring 1207 for returning the lifting ring 1202 to the lowest position is sleeved on the guide rod 1205; a lower end surface ratchet wheel 1208 with upward ratchets is arranged on the upper side of the lifting ring 1202, an upper end surface ratchet wheel 1209 matched with the lower end surface ratchet wheel 1208 is arranged above the lower end surface ratchet wheel 1208, and the upper end surface ratchet wheel 1209 is fixed with the valve rod 7.
Through setting up dead lock mechanism 12 of valve rod, when natural gas leaked to the valve rod through-hole 6 inner chamber of valve rod 7 below, the atmospheric pressure of valve rod through-hole 6 inner chamber will increase, and then promoted the slider 1206 in the slide 1203 through atmospheric pressure passageway 1204 and rise, and the lifting ring 1202 passes through guide bar 1205 to be connected with slider 1206, therefore, whole lifting ring 1202 can follow the slider 1206 and rise. When the lifting ring 1202 is lifted, the lower end ratchet 1208 on the upper side of the lifting ring 1202 engages with the upper end ratchet 1209 fixed to the stem 7, thereby locking the stem 7. One will no longer be able to rotate the valve stem 7 and thereby reduce the possibility of natural gas leaking from the valve stem 7.
EXAMPLE III
Referring to fig. 18 to 19, the present embodiment further improves on the first embodiment as follows:
The valve rod sealing mechanism 13 comprises a positioning sleeve 1201 and an inflatable sealing ring 1301, the positioning sleeve 1201 is coaxially embedded in the valve rod through hole 6, the valve rod 7 is in rotary sealing fit with the valve rod through hole 6 through the positioning sleeve 1201, a plurality of O-shaped sealing rings 705 are sleeved on the valve rod 7, and the O-shaped sealing rings 705 are in rotary sealing fit with the inner wall of the positioning sleeve 1201; a sealing ring limiting groove 1302 is annularly arranged on the inner wall of the positioning sleeve 1201, and the inflatable sealing ring 1301 is arranged in the sealing ring limiting groove 1302 and annularly arranged on the outer side of the valve rod 7; an inflation channel 1303 is arranged in the positioning sleeve 1201, one end of the inflation channel 1303 is communicated with the inflation sealing ring 1301, and the other end of the inflation channel 1303 is communicated with an inner cavity of the valve rod through hole 6 below the valve rod 7.
Through setting up valve rod sealing mechanism 13, when natural gas leaked the valve rod through hole 6 inner chamber to valve rod 7 below, the atmospheric pressure of valve rod through hole 6 inner chamber will increase, and then gets into inflatable seal 1301 through inflation channel 1303, and inflatable seal 1301 atress inflation holds valve rod 7 tightly, keeps apart into two cavitys with inflatable seal 1301 as the boundary line with valve rod 7 outside for valve rod 7 department more one deck is sealed, and the natural gas in the disk seat 1 is more difficult for leaking from valve rod 7.
Example four
Referring to fig. 20 to 21, the present embodiment further improves the following on the basis of the first embodiment:
The valve rod locking mechanism 12 comprises a positioning sleeve 1201 and a lifting ring 1202, the positioning sleeve 1201 is coaxially embedded in the valve rod through hole 6, the valve rod 7 is in rotary sealing fit with the valve rod through hole 6 through the positioning sleeve 1201, a plurality of O-shaped sealing rings 705 are sleeved on the valve rod 7, and the O-shaped sealing rings 705 are in rotary sealing fit with the inner wall of the positioning sleeve 1201; a plurality of slide ways 1203 and a plurality of air pressure channels 1204 are arranged in the positioning sleeve 1201, the slide ways 1203 correspond to the air pressure channels 1204 one by one, the slide ways 1203 are vertically arranged, an opening at the upper end of the slide ways 1203 is positioned on the end surface of the top of the positioning sleeve 1201, an opening at the lower end of the slide ways is communicated with one end of the corresponding air pressure channel 1204, and the other end of the air pressure channel 1204 is communicated with an inner cavity of a valve; the lifting ring 1202 is transversely arranged right above the positioning sleeve 1201, a plurality of guide rods 1205 are arranged on the lower side of the lifting ring 1202, sliding blocks 1206 are arranged at the lower ends of the guide rods 1205, the sliding blocks 1206 are in one-to-one correspondence with the sliding ways 1203, and the sliding blocks 1206 are arranged in the sliding ways 1203 and are in sliding sealing fit with the corresponding sliding ways 1203; a compression spring 1207 for returning the lifting ring 1202 to the lowest position is sleeved on the guide rod 1205; a lower end surface ratchet wheel 1208 with upward ratchets is arranged on the upper side of the lifting ring 1202, an upper end surface ratchet wheel 1209 matched with the lower end surface ratchet wheel 1208 is arranged above the lower end surface ratchet wheel 1208, and the upper end surface ratchet wheel 1209 is fixed with the valve rod 7.
The valve rod sealing mechanism 13 at least comprises an inflatable sealing ring 1301, a sealing ring limiting groove 1302 is annularly arranged on the inner wall of the positioning sleeve 1201, and the inflatable sealing ring 1301 is arranged in the sealing ring limiting groove 1302 and annularly arranged on the outer side of the valve rod 7; an inflation channel 1303 is arranged in the positioning sleeve 1201, one end of the inflation channel 1303 is communicated with the inflation sealing ring 1301, and the other end of the inflation channel 1303 is communicated with an inner cavity of the valve rod through hole 6 below the valve rod 7.
Through setting up dead lock mechanism 12 of valve rod, when natural gas leaked to the valve rod through-hole 6 inner chamber of valve rod 7 below, the atmospheric pressure of valve rod through-hole 6 inner chamber will increase, and then promoted the slider 1206 in the slide 1203 through atmospheric pressure passageway 1204 and rise, and the lifting ring 1202 passes through guide bar 1205 to be connected with slider 1206, therefore, whole lifting ring 1202 can follow the slider 1206 and rise. When the lifting ring 1202 is lifted, the lower end ratchet 1208 on the upper side of the lifting ring 1202 engages with the upper end ratchet 1209 fixed to the stem 7, thereby locking the stem 7. One will no longer be able to rotate the valve stem 7 and thereby reduce the possibility of natural gas leaking from the valve stem 7.
Through setting up valve rod sealing mechanism 13, when natural gas leaked the valve rod through hole 6 inner chamber to valve rod 7 below, the atmospheric pressure of valve rod through hole 6 inner chamber will increase, and then gets into inflatable seal 1301 through inflation channel 1303, and inflatable seal 1301 atress inflation holds valve rod 7 tightly, keeps apart into two cavitys with inflatable seal 1301 as the boundary line with valve rod 7 outside for valve rod 7 department more one deck is sealed, and the natural gas in the disk seat 1 is more difficult for leaking from valve rod 7.
Claims (6)
1. The utility model provides a valve for natural gas transportation, includes disk seat (1) at least, locates valve ball (2) in disk seat (1), is used for driving valve ball (2) rotatory valve rod (7) and locates intake even pipe (3) of disk seat (1) one side and locate outlet even pipe (4) of disk seat (1) opposite side, and valve ball (2) both sides respectively press from both sides tight location through a locating seat (5), go up towards valve ball (2) one side on two locating seats (5) and all be equipped with first sealing washer (501) with valve ball (2) outer wall laminating, disk seat (1) upside runs through the inside and outside wall and is equipped with a valve rod through hole (6), valve rod (7) location is in valve rod through hole (6), its characterized in that:
The cavity of the air inlet connecting pipe (3) comprises a transverse channel (301) and a longitudinal channel (302), the upper end of the longitudinal channel (302) is provided with a piston accommodating cavity, the lower end of the longitudinal channel is provided with an air inlet (303) of a valve, one end of the transverse channel (301) is communicated with one end of the valve seat (1), and the other end of the transverse channel is communicated with the longitudinal channel (302);
A piston sleeve (304) and a piston (305) are arranged in the longitudinal channel (302), the outer wall of the piston sleeve (304) is attached, sealed and fixed with the inner wall of the longitudinal channel (302), the wall of the piston sleeve (304) is provided with an opening (318) communicated with the transverse channel (301), the piston (305) is slidably arranged in the piston sleeve (304), the piston (305) is divided into an upper external thread section (306), a sealing section (307) and a lower external thread section (308) from top to bottom, the diameters of the upper external thread section (306) and the lower external thread section (308) are smaller than that of the sealing section (307), the top of the tube hole of the piston sleeve (304) is provided with an upper internal thread section (309) which is screwed and matched with the upper external thread section (306), and the bottom of the tube hole of the piston sleeve (304) is provided with a lower internal thread section (310) which is screwed and matched with the lower external thread section (308);
The valve further comprises a detachable piston driving rod (311) and a detachable sealing cover (312), a driving rod through hole (313) is formed in the pipe wall of the air inlet connecting pipe (3), the central axis of the driving rod through hole (313) coincides with the central axis of the piston sleeve (304), the piston driving rod (311) can penetrate through the driving rod through hole (313) to be connected with the top of the piston (305), the piston driving rod (311) and the driving rod through hole (313) are in sliding sealing fit, a sealing boss (314) is annularly arranged outside the driving rod through hole (313), and the sealing boss (314) and the sealing cover (312) are fixed through threads.
2. A valve for the transport of natural gas according to claim 1, characterized in that: the piston driving rod (311) lower extreme is equipped with the cross section and is regular hexagon's head (316), piston (305) top be equipped with can with the hexagonal counter bore (317) of piston driving rod (311) lower extreme head joint, still be equipped with vertical anti-drop structure between piston driving rod (311) and piston (305).
3. A valve for the transport of natural gas according to claim 1, characterized in that: and the outer wall of the piston sleeve (304) is provided with a convex reinforcing rib (315).
4. A valve for the transport of natural gas according to claim 1, characterized in that: a double-joint universal joint (8) is arranged in the valve seat (1), the lower section of the valve rod (7) is located in the valve rod through hole (6), the valve rod (7) is in rotary sealing fit with the valve rod through hole (6) through a rotary sealing mechanism, a universal joint positioning hole (701) is formed in the lower end of the valve rod (7), the double-joint universal joint (8) is longitudinally arranged and sequentially divided into an upper joint (801), a middle joint (802) and a lower joint (803) from top to bottom, the upper section of the upper joint (801) slidably extends into the universal joint positioning hole (701) in the lower end of the valve rod (7), and the upper joint (801) and the universal joint positioning hole (701) cannot rotate relatively; the lower end of the lower section (803) is connected with the top of the valve ball (2) and can drive the valve ball (2) to rotate.
5. A valve for the transport of natural gas according to claim 4, characterized in that: be located and be equipped with a sliding seat (9) in disk seat (1) hole between two positioning seats (5), sliding seat (9) are horizontal cylindricly, are sliding seal cooperation between sliding seat (9) outer wall and disk seat (1) inner wall, valve ball (2) are located sliding seat (9) tube hole, and sliding seat (9) tube hole inner wall both sides are equipped with second sealing washer (901) that are used for pressing from both sides tight sealing valve ball (2) and are used for fixing a position spacing ring (902) of second sealing washer (901), offer through-hole (903) that are used for two sections universal joint (8) to pass on sliding seat (9) tube wall.
6. a valve for the transport of natural gas according to claim 4, characterized in that: the valve rod sealing mechanism (13) comprises a positioning sleeve (1201) and an inflatable sealing ring (1301), the positioning sleeve (1201) is coaxially embedded in the valve rod through hole (6), the valve rod (7) is in rotary sealing fit with the valve rod through hole (6) through the positioning sleeve (1201), a plurality of O-shaped sealing rings (705) are sleeved on the valve rod (7), and the O-shaped sealing rings (705) are in rotary sealing fit with the inner wall of the positioning sleeve (1201); a sealing ring limiting groove (1302) is annularly arranged on the inner wall of the positioning sleeve (1201), and the inflatable sealing ring (1301) is arranged in the sealing ring limiting groove (1302) and annularly arranged on the outer side of the valve rod (7); an inflation channel (1303) is arranged in the positioning sleeve (1201), one end of the inflation channel (1303) is communicated with the inflation sealing ring (1301), and the other end of the inflation channel (1303) is communicated to an inner cavity of the valve rod through hole (6) below the valve rod (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878251.2A CN110529623B (en) | 2018-12-24 | 2018-12-24 | Valve rod locking mechanism of valve |
| CN201811581061.6A CN109386628B (en) | 2018-12-24 | 2018-12-24 | Valve for natural gas transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581061.6A CN109386628B (en) | 2018-12-24 | 2018-12-24 | Valve for natural gas transportation |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910878251.2A Division CN110529623B (en) | 2018-12-24 | 2018-12-24 | Valve rod locking mechanism of valve |
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| Publication Number | Publication Date |
|---|---|
| CN109386628A CN109386628A (en) | 2019-02-26 |
| CN109386628B true CN109386628B (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811581061.6A Active CN109386628B (en) | 2018-12-24 | 2018-12-24 | Valve for natural gas transportation |
| CN201910878251.2A Active CN110529623B (en) | 2018-12-24 | 2018-12-24 | Valve rod locking mechanism of valve |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910878251.2A Active CN110529623B (en) | 2018-12-24 | 2018-12-24 | Valve rod locking mechanism of valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109798384B (en) * | 2019-03-05 | 2020-01-21 | 深圳市德诚旺科技有限公司 | Valve body of polyethylene ball valve |
| CN111237497B (en) * | 2020-01-20 | 2021-08-10 | 君品集团有限公司 | Ball valve |
| CN111677903B (en) * | 2020-06-22 | 2021-12-03 | 玉环孙氏暖通设备有限公司 | PE ball valve |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3651831A (en) * | 1970-04-29 | 1972-03-28 | Irving Gardner | Safety bleeder valve |
| CN200982655Y (en) * | 2006-12-05 | 2007-11-28 | 刘芝 | Three-section type high pressure furnace flame control device |
| US8398053B2 (en) * | 2009-04-29 | 2013-03-19 | Bp Corporation North America Inc. | Double piston trunnion mounted ball valves and methods of use |
| CN102829229B (en) * | 2012-08-03 | 2014-04-16 | 浙江恒森实业集团有限公司 | Small ball valve actuator with one-way ratchet wheel |
| CN204573160U (en) * | 2015-03-27 | 2015-08-19 | 解始建 | A kind of environmental protection triangle vavle spool |
| CN204784815U (en) * | 2015-05-26 | 2015-11-18 | 苏州市燃气设备阀门制造有限公司 | PE connects steel ball valve |
| CN206352684U (en) * | 2016-12-05 | 2017-07-25 | 奉化市中亚液压成套制造有限公司 | A kind of self-locking Filtering ball valve |
| CN207598997U (en) * | 2017-10-25 | 2018-07-10 | 厦门匠仕工业设计有限公司 | A kind of angle valve with filtering function |
| CN207598992U (en) * | 2017-12-11 | 2018-07-10 | 梅思安(中国)安全设备有限公司 | Self-locking bottle valve |
| CN108916445B (en) * | 2018-08-23 | 2020-01-31 | 长沙星沙新奥燃气有限公司 | polyethylene ball valve |
| CN109027295B (en) * | 2018-09-10 | 2019-09-06 | 启东市鑫宇冶金设备有限公司 | A kind of PE ball valve |
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2018
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| Publication number | Publication date |
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| CN110529623A (en) | 2019-12-03 |
| CN110529623B (en) | 2021-03-05 |
| CN109386628A (en) | 2019-02-26 |
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Effective date of registration: 20191126 Address after: 314300 palm Road No. 555 in the new area of Haiyan Economic Development Zone, Jiaxing, Zhejiang Applicant after: JIAXING AIDIXI HEATING VENTILATION SCIENCE & TECHNOLOGY CO., LTD. Address before: 311835 Lanxi No. 59, Changlan Village, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Applicant before: Xuan Qi |
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