CN112923097A - Spherical emergency cut-off valve - Google Patents
Spherical emergency cut-off valve Download PDFInfo
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- CN112923097A CN112923097A CN202110400599.8A CN202110400599A CN112923097A CN 112923097 A CN112923097 A CN 112923097A CN 202110400599 A CN202110400599 A CN 202110400599A CN 112923097 A CN112923097 A CN 112923097A
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- driving shaft
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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
- 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
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a spherical emergency cut-off valve.A spherical valve core is arranged in an inner cavity of a valve body, a notch is formed in the top of the spherical valve core, and a trapezoidal supporting block which is narrow at the bottom and wide at the top is arranged in the notch; the inner side of the connecting sleeve is rotatably connected with a driving shaft, the bottom of the driving shaft is in threaded connection with an upper valve rod, a first boss is arranged corresponding to the bottom end face of the driving shaft, a limiting rod is fixedly connected to the side wall of the upper valve rod, and the bottom end of the upper valve rod penetrates through the valve body and is fixedly connected with a supporting block; the side wall of the connecting sleeve is provided with an inverted L-shaped slotted hole. According to the invention, when the hand wheel rotates anticlockwise, the driving shaft drives the upper valve rod to lift upwards, the horizontal section of the inverted L-shaped slotted hole rotates 90 degrees to reach the other side of the horizontal section of the inverted L-shaped slotted hole, and due to the limiting action of the limiting rod, the driving shaft continues to rotate anticlockwise to drive the upper valve rod to continue upwards until the bottom end face of the driving shaft is attached and locked with the upper end face of the first boss of the upper valve rod. Conversely, the rotating drive shaft pushes the upper valve stem downward until the valve closes.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a spherical emergency cut-off valve.
Background
The sealing of the emergency cut-off valve installed and used on the existing pipeline mainly depends on the tight fit of the sealing surfaces at the two ends of the ball body in the valve cavity and the left and right sealing parts of the valve body to realize the sealing function. Make the valve possess sealed function, traditional spheroid must rely on powerful locking force to make disk seat and spheroid closely laminate and just can realize sealed function, and after traditional spheroid reached encapsulated situation, the moment of opening, closing is too big, and the spheroid of most big bore a little must install auxiliary device additional and just can operate, simultaneously, in whole operation of opening, closing, spheroid and disk seat seal part wearing and tearing are serious, and the regularity causes the valve to leak because this drawback, influences the normal use of valve. In order to enable normal production, enterprises need to frequently replace or maintain, so that a large amount of resources are wasted, and great potential safety hazards are generated. And because the large-caliber ball valve has larger torque and is difficult to realize quick opening and closing, the large-caliber spherical sealing type emergency cut-off valve does not exist in the current domestic and foreign markets, which seriously influences the safety guarantee of industrial production.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a spherical emergency shut-off valve.
In order to achieve the purpose, the invention provides the following technical scheme:
a spherical emergency cut-off valve comprises a valve body, wherein a spherical valve core is arranged in an inner cavity of the valve body, a medium channel is formed in the spherical valve core, a notch is formed in the top of the spherical valve core, and a trapezoidal supporting block with a narrow lower part and a wide upper part is arranged in the notch;
a connecting sleeve is fixed above the valve body, a driving shaft is rotatably connected to the inner side of the connecting sleeve, an upper valve rod is in threaded connection with the bottom of the driving shaft, a limiting rod is fixedly connected to the side wall of the upper valve rod, a first boss is integrally formed on the outer wall of the upper valve rod and located between the limiting rod and the driving shaft, the first boss is arranged corresponding to the end face of the bottom of the driving shaft, and the bottom end of the upper valve rod penetrates through the valve body and is fixedly connected with the supporting block;
an inverted L-shaped groove hole is formed in the side wall of the connecting sleeve, and the limiting rod is located in the inverted L-shaped groove hole and can freely slide in the inverted L-shaped groove hole and limit the rotary motion angle of the upper valve rod.
Furthermore, the valve body comprises a middle valve body, a left valve body and a right valve body which are connected with openings on two sides of the middle valve body, and annular sealing rings are fixed at one ends of the left valve body and the right valve body, which are in contact with the spherical valve core, respectively.
Furthermore, the bottom of the middle valve body is connected with a lower valve rod, and the top end of the lower valve rod is rotatably connected with the spherical valve core.
Furthermore, the bottom of the middle valve body is provided with a mounting hole, the lower valve rod comprises a mandrel and a shaft sleeve, the mandrel is located inside the shaft sleeve and penetrates through the mounting hole to be rotatably connected with the spherical valve core, a bearing is further arranged on the outer side of the shaft sleeve, a bottom cover is further arranged at the bottom of the middle valve body, and the bearing, the shaft sleeve and the mandrel are fixed inside the mounting hole through the bottom cover.
Furthermore, a packing groove for packing sealing packing is arranged between the middle valve body and the upper valve rod, a packing gland is arranged above the packing groove, and the packing gland is fixedly connected with the middle valve body through bolts.
Further, the inboard round flange that is equipped with in connecting sleeve's upper portion, the internal diameter of flange is not less than the external diameter of drive shaft, integrated into one piece has round second boss on the lateral wall of drive shaft, the second boss is located the top of flange, just the bottom and the top of second boss are equipped with a tapered roller bearing respectively, connecting sleeve's top is equipped with the bearing gland, the top fixed mounting of drive shaft has the hand wheel.
Furthermore, a first L-shaped connecting rod and a second L-shaped connecting rod are arranged in the notch, and the trapezoidal supporting block is located between the first L-shaped connecting rod and the second L-shaped connecting rod.
Furthermore, the notch is arranged along the direction of the medium channel, the front and the back of two ends of the notch are milled into platforms, pin holes are symmetrically drilled on the platforms, and one end of each of the first L-shaped connecting rod and the second L-shaped connecting rod extends into the pin holes and is fixedly connected with the notch.
Furthermore, a through hole is formed in the middle of the trapezoid supporting block, and the bottom of the upper valve rod penetrates through the through hole and is fixedly connected with the trapezoid supporting block.
Furthermore, the drive shaft is close to the one end of going up the valve rod is equipped with the screw, the top of going up the valve rod be equipped with screw complex external screw thread, first boss is located the below of external screw thread, the drive shaft be close to the terminal surface of first boss is equipped with anti-skidding gasket.
Compared with the prior art, the invention has the following beneficial effects:
1. the key core sealing element spherical valve core is separated from the sealing surfaces of the left valve body and the right valve body in the whole process of opening or closing the valve, the spherical valve core does not rub with the left valve body and the right valve body when moving, the spherical valve core is provided with a notch and has opening and closing functions, the whole volume of the spherical valve core can be adjusted to be increased or decreased under the action of external force, the forced compensation function is realized on sealing, the sealing performance of the valve is more reliable, the sealing form that the traditional ball valve can only achieve sealing by strong locking force is changed, when the valve is fully opened or fully closed, the opening and closing force is light, the opening or closing time is short, and the valve has the function of quickly cutting off or opening in an emergency state.
2. When the hand wheel rotates anticlockwise, the driving shaft rotating along with the hand wheel drives the upper valve rod to lift upwards, the transverse slot orifice of the inverted L-shaped slot hole reaching the connecting sleeve directly rotates 90 degrees to the other side of the transverse slot hole of the horizontal section of the inverted L-shaped slot hole, the driving shaft continues rotating anticlockwise to drive the upper valve rod to continue lifting upwards through the acting force of the limiting rod contacting with the side wall of the transverse slot hole, and the end face of the bottom of the driving shaft is tightly attached and locked with the end face of the upper part of the first boss of the upper valve rod. Otherwise, the driving shaft rotates clockwise to drive the upper valve rod to rotate clockwise by 90 degrees, so that the limiting rod is contacted with the side wall of the inverted L-shaped slotted hole and the driving shaft is enabled to be separated from the end face tightly attached to the upper valve rod, and the rotating driving shaft pushes the upper valve rod to move downwards until the valve is closed. The device can drive the valve to be opened or closed by the linkage of the straight stroke and the angular stroke or the linkage of the angular stroke and the straight stroke.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a connecting sleeve and a limiting rod according to the present invention;
FIG. 3 is a schematic view of a connection structure of a trapezoidal support block and a notch according to the present invention;
fig. 4 is a schematic view of the connection structure of the lower valve stem of the present invention.
In the figure: 1. an intermediate valve body; 2. a left valve body; 3. a right valve body; 4. a connecting sleeve; 5. a drive shaft; 6. a flange; 7. a second boss; 8. a tapered roller bearing; 9. a bearing gland; 10. a hand wheel; 11. an upper valve stem; 12. a limiting rod; 13. an inverted L-shaped slot; 14. a first boss; 15. an anti-slip gasket; 16. a packing groove; 17. a packing gland; 18. a spherical valve core; 19. opening the gap; 20. a first L-shaped connecting rod; 21. a second L-shaped connecting rod; 22. a trapezoidal support block; 23. a lower valve stem; 24. a mandrel; 25. a T-shaped shaft sleeve; 26. mounting holes; 27. a groove; 28. a bottom cover.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description herein, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the patent and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the patent. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
As shown in figures 1-4 of the drawings,
the utility model provides a spherical emergency cut-off valve, middle valve body 1 and with left valve body 2 and the right valve body 3 of middle valve body 1's both sides opening connection, respectively be equipped with the flange through bolt locking between left valve body 2 and right valve body 3 and the middle valve body 1, install sealed well hole pad additional between left valve body 2 and right valve body 3 and the middle valve body 1 contact surface and lock through the bolt, make this position reach encapsulated situation.
The top of middle valve body 1 is fixed with connecting sleeve 4, the inboard rotation of connecting sleeve 4 is connected with drive shaft 5, the inboard of connecting sleeve 4 is equipped with round flange 6, the internal diameter of flange 6 is not less than the external diameter of drive shaft 5, integrated into one piece has round second boss 7 on the lateral wall of drive shaft 5, second boss 7 is located the top of flange 6, and the bottom and the top of second boss 7 are equipped with a tapered roller bearing 8 respectively, there is bearing gland 9 at the top of connecting sleeve 4 through threaded connection, drive shaft 5 top-down runs through bearing gland 9 in proper order, tapered roller bearing 8 and flange 6 extend to the inside of connecting sleeve 4, the top of drive shaft 5 is processed into the hexagon, hand wheel 10 is equipped with to the top cover of drive shaft 5, the last lock nut who is equipped with the compression hand wheel of.
The bottom of drive shaft 5 is equipped with the screw, and the top of going up valve stem 11 is equipped with the external screw thread with screw complex, goes up the top screw in of valve stem 11 in the bottom screw of drive shaft 5. Go up and offer threaded hole on the lateral wall of valve rod 11, the tip of gag lever post 12 be equipped with this screw hole complex external screw thread, gag lever post 12 passes through thread fixing and installs on the lateral wall of last valve rod 11, has seted up on the lateral wall of connecting sleeve 4 and has fallen L type slot hole 13, gag lever post 12 is located and falls L type slot hole 13 and can freely slide and carry on spacingly to the rotary motion angle of last valve rod 11 in falling L type slot hole 13.
Go up valve rod 11's outer wall integrated into one piece and have first boss 14, first boss 14 is located between gag lever post 12 and drive shaft 5, and first boss 14 corresponds the setting with drive shaft 5 bottom terminal surface. The bottom of drive shaft 5 mills the notch that has the symmetry on being close to the terminal surface of first boss 14, adds in the tip of drive shaft 5 and is equipped with anti-skidding gasket 15, and anti-skidding gasket 15 is equipped with the antiskid sheet of taking the boss towards outside above the one side, and the boss embedding drive shaft 5 of antiskid sheet is in the notch of terminal surface, prevents to slide.
The bottom end of the upper valve rod 11 penetrates through and extends into the middle valve body 1, a packing groove 16 used for packing sealing packing is formed between the middle valve body 1 and the upper valve rod 11, a packing gland 17 is arranged above the packing groove 16, and two sides of the top end of the packing gland 17 are connected with the flange on the upper portion of the middle valve body 1 through bolts and nuts and compress the sealing packing.
The inner cavity of the middle valve body 1 is provided with a spherical valve core 18, a medium channel is arranged in the spherical valve core 18, the joint parts of the left valve body 2 and the right valve body 3, which are contacted with the spherical valve core 18, are respectively fixed with an annular sealing ring, and two side surfaces of the medium channel of the spherical valve core 18 are tightly jointed with the annular sealing rings of the left valve body 2 and the right valve body 3, so that the sealing effect is achieved.
The top of the spherical valve core 18 is provided with a notch 19, the notch 19 is arranged along the direction of the medium channel, so that the spherical valve body 18 has the opening and closing function, the bottom of the notch 19 is processed into a certain angle, two opposite side walls of the notch 19 are respectively milled into two platforms which are arranged in front and at the back, pin holes are symmetrically drilled on the platforms, two groups of the same first L-shaped connecting rod 20 and the same second L-shaped connecting rod 21 which are bent into ninety degrees are symmetrically arranged in the notch, one ends of the first L-shaped connecting rod 20 and the second L-shaped connecting rod 21 are respectively inserted in the pin holes and fixedly connected with the notch 19, and the other ends of the first L-shaped connecting rod 20 and the second L-shaped connecting rod 21 are connected with the side wall of the notch 19. The side walls of the first L-shaped connecting rod 20 and the second L-shaped connecting rod 21, which are connected with the side wall of the opening 19, are also provided with pin holes, the side wall of the opening 19 is also provided with corresponding pin holes, and the pin holes sequentially penetrate through the pin holes in the side wall of the opening and the pin holes in the first L-shaped connecting rod 20 and the second L-shaped connecting rod 21 to fixedly connect the first L-shaped connecting rod 20 and the second L-shaped connecting rod 21.
A trapezoidal support block 22 which is narrow at the bottom and wide at the top is arranged between two first L-shaped connecting rods 20 and two second L-shaped connecting rods 21 in the gap 19, a through hole is formed in the middle of the trapezoidal support block 22, the bottom of the upper valve rod 11 is inserted into the through hole, a pin hole penetrating through the rod body is drilled at the bottom of the upper valve rod 11, a through pin hole is also drilled in the trapezoidal support block 22, and the upper valve rod and the pin hole in the trapezoidal support block 22 are penetrated through by a fixing pin to be fixedly connected.
The lower valve rod 23 comprises a mandrel 24 and a T-shaped shaft sleeve 25, the mandrel 24 is positioned inside the T-shaped shaft sleeve 25 and is rotatably connected with the T-shaped shaft sleeve 25, a mounting hole 26 is formed in the bottom of the middle valve body 1, a tapered roller bearing is arranged in the mounting hole 26, one end of the T-shaped shaft sleeve 25 penetrates through the tapered roller bearing and the mounting hole 26 in the bottom of the middle valve body 1, a groove 27 is formed in the bottom of the spherical valve core 18, and a notch is formed in the position of the groove 27, so that the bottom end of the spherical valve core 18 has certain elasticity. The top of the spindle 24 is rotatably connected with a groove 27 at the bottom of the ball valve core 18, and the lower valve rod 23 limits the ball valve body 18 through the spindle 24 passing through the groove 27.
The bottom of the middle valve body 1 is further provided with a bottom cover 28, the tapered roller bearing, the T-shaped shaft sleeve 25 and the mandrel 24 are fixed inside the mounting hole 26 through the bottom cover 28, a bottom cover gasket is additionally arranged at the flange connecting position of the bottom cover 28 and the bottom of the middle valve body 1, the bottom cover gasket is connected through a hexagonal bolt in a locking mode, and the sealing state is achieved.
The working principle of the device is as follows:
1. when the valve is in a closed state, the medium channel of the spherical valve core is mutually vertical to the channels of the left valve body and the right valve body, the trapezoidal supporting block is located at the lowest position at the moment, namely, the trapezoidal supporting block is the largest in contact surface with the opening, the spherical valve core is extruded to achieve the best sealing effect, and meanwhile, the limiting rod is located at the lowest end of the inverted L-shaped slot hole at the moment.
At this moment, if the valve needs to be opened, the hand wheel drives the driving shaft to rotate when being pushed by external force to rotate anticlockwise, the upper valve rod cannot rotate along with the driving shaft due to the fact that the upper valve rod is limited by the limiting rod, the upper valve rod moves upwards under the driving of the driving shaft, and the external thread part at the bottom of the upper valve rod is screwed into the screw hole of the driving shaft. When the first boss on the upper valve rod rises to contact with the anti-skid sheet and compress the anti-skid gasket at the bottom of the anti-skid sheet, the upper valve rod and the driving shaft are tightly locked, and the limiting rod also rises to the turning point of the inverted L-shaped slotted hole from the lowest end of the inverted L-shaped slotted hole in the process.
In the process, the ascending of the upper valve rod drives the bottom trapezoidal supporting block to ascend, the trapezoidal supporting block with the angle gradually ascends from the notch part of the spherical valve core, the spherical valve core contracts under the condition of losing the extrusion effect of the trapezoidal supporting block, and the spherical valve core is separated from the sealing parts of the left valve body and the right valve body.
And the hand wheel continuously rotates anticlockwise, the hand wheel drives the driving shaft, the upper valve rod, the spherical valve core and other parts which are tightly locked together to rotate ninety degrees along the horizontal section of the inverted L-shaped slotted hole, the medium channel of the spherical valve core is communicated with the channels of the left valve body and the right valve body, and the valve is in an open state at the moment.
2. Referring to the steps, when the valve is in an open state, the medium channel of the spherical valve core is communicated with the channels of the left valve body and the right valve body, and the trapezoidal supporting block is located at the highest position, namely the contact surface with the notch is the smallest, so that the spherical valve core cannot be squeezed. Meanwhile, the limiting rod is positioned at the position, far away from the turning point, of the horizontal section of the inverted L-shaped groove hole.
At the moment, if the valve needs to be closed, the hand wheel is pushed by external force to rotate clockwise, the clockwise rotation of the hand wheel drives the driving shaft and the upper valve rod which is tightly locked together to rotate ninety degrees along the horizontal section of the inverted L-shaped groove hole, and when the limiting rod fixed with the upper valve rod is ejected to the side wall of the turning point of the inverted L-shaped groove hole, the upper valve rod cannot rotate continuously under the action of the limiting rod. In the process, the hand wheel drives the driving shaft, the upper valve rod, the spherical valve core and other parts which are tightly locked together to rotate ninety degrees along the horizontal section of the inverted L-shaped slotted hole, a medium channel of the spherical valve core is vertical to the channels of the left valve body and the right valve body, and the valve is in a closed state at the moment.
In order to further improve the sealing effect, at the moment, under the action of the driving shaft which continuously rotates clockwise, the external thread part at the top of the upper valve rod begins to be separated from the screw hole of the driving shaft, the rotating driving shaft pushes the upper valve rod to move downwards, the upper valve rod drives the bottom trapezoidal supporting block to move downwards, the bottom part of the trapezoidal supporting block with the angle is wedged into the notch of the spherical valve core, the spherical valve core is propped open under the continuous extrusion of the trapezoidal supporting block to the notch, and the spherical valve core is tightly attached to the sealing parts of the left valve body and the right valve body to achieve the sealing state.
In summary, when the hand wheel of the present invention rotates counterclockwise, the driving shaft rotating together with the hand wheel drives the upper valve rod to lift upward, reaches the transverse slot opening of the inverted L slot of the connecting sleeve, directly rotates 90 degrees to reach the other side of the transverse slot of the horizontal segment of the inverted L slot, and the driving shaft continues to rotate counterclockwise to drive the upper valve rod to continue to lift upward by the acting force of the limiting rod contacting the lateral wall of the transverse slot until the bottom end face of the driving shaft is tightly attached and locked with the upper end face of the first boss of the upper valve rod. Otherwise, the driving shaft rotates clockwise to drive the upper valve rod to rotate clockwise by 90 degrees, so that the limiting rod is contacted with the side wall of the inverted L-shaped slotted hole and the driving shaft is enabled to be separated from the end face tightly attached to the upper valve rod, and the rotating driving shaft pushes the upper valve rod to move downwards until the valve is closed. The device can drive the valve to be opened or closed by the linkage of the straight stroke and the angular stroke or the linkage of the angular stroke and the straight stroke.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a sphere emergency cut-off valve which characterized in that: the valve comprises a valve body, wherein a spherical valve core is arranged in an inner cavity of the valve body, a medium channel is formed in the spherical valve core, a notch is formed in the top of the spherical valve core, and a trapezoidal supporting block which is narrow at the bottom and wide at the top is arranged in the notch;
a connecting sleeve is fixed above the valve body, a driving shaft is rotatably connected to the inner side of the connecting sleeve, an upper valve rod is in threaded connection with the bottom of the driving shaft, a limiting rod is fixedly connected to the side wall of the upper valve rod, a first boss is integrally formed on the outer wall of the upper valve rod and located between the limiting rod and the driving shaft, the first boss is arranged corresponding to the end face of the bottom of the driving shaft, and the bottom end of the upper valve rod penetrates through the valve body and is fixedly connected with the supporting block;
the limiting rod is located in the inverted L-shaped groove hole and can freely slide in the inverted L-shaped groove hole, and the rotating motion angle of the upper valve rod is limited.
2. A spherical quick emergency valve according to claim 1, characterised in that: the valve body comprises a middle valve body, a left valve body and a right valve body, wherein the left valve body and the right valve body are connected with openings on two sides of the middle valve body, and annular sealing rings are fixed at one ends, which are contacted with the spherical valve core, of the left valve body and the right valve body respectively.
3. A spherical quick emergency valve according to claim 1, characterised in that: the bottom of the middle valve body is connected with a lower valve rod, and the top end of the lower valve rod is rotatably connected with the spherical valve core.
4. A spherical quick emergency valve according to claim 3, wherein: the bottom of the middle valve body is provided with a mounting hole, the lower valve rod comprises a mandrel and a shaft sleeve, the mandrel is located inside the shaft sleeve and penetrates through the mounting hole to be rotatably connected with the spherical valve element, a bearing is further arranged on the outer side of the shaft sleeve, a bottom cover is further arranged at the bottom of the middle valve body, and the bearing, the shaft sleeve and the mandrel are fixed inside the mounting hole through the bottom cover.
5. A spherical quick emergency valve according to claim 1, characterised in that: a packing groove for packing sealing packing is arranged between the middle valve body and the upper valve rod, a packing gland is arranged above the packing groove, and the packing gland is fixedly connected with the middle valve body through bolts.
6. A spherical quick emergency valve according to claim 1, characterised in that: the utility model discloses a bearing, including connecting sleeve, drive shaft, connecting sleeve's upper portion inboard is equipped with the round flange, the internal diameter of flange is not less than the external diameter of drive shaft, integrated into one piece has round second boss on the lateral wall of drive shaft, the second boss is located the top of flange, just the bottom and the top of second boss are equipped with a tapered roller bearing respectively, connecting sleeve's top is equipped with the bearing gland, the top fixed mounting of drive shaft has the hand wheel.
7. A spherical quick emergency valve according to claim 1, characterised in that: a first L-shaped connecting rod and a second L-shaped connecting rod are arranged in the notch, and the trapezoidal supporting block is located between the first L-shaped connecting rod and the second L-shaped connecting rod.
8. A spherical quick emergency valve according to claim 7, wherein: the opening is arranged along the direction of the medium channel, platforms are milled from the front to the back of two ends of the opening, pin holes are symmetrically drilled in the platforms, and one ends of the first L-shaped connecting rod and the second L-shaped connecting rod respectively extend into the pin holes and are fixedly connected with the opening.
9. A spherical quick emergency valve according to claim 1, characterised in that: the middle part of the trapezoid supporting block is provided with a through hole, and the bottom of the upper valve rod penetrates through the through hole and is fixedly connected with the trapezoid supporting block.
10. A spherical quick emergency valve according to claim 1, characterised in that: the drive shaft is close to the one end of going up the valve rod is equipped with the screw, the top of going up the valve rod be equipped with screw complex external screw thread, first boss is located the below of external screw thread, the drive shaft be close to the terminal surface of first boss is equipped with anti-skidding gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110400599.8A CN112923097A (en) | 2021-04-14 | 2021-04-14 | Spherical emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110400599.8A CN112923097A (en) | 2021-04-14 | 2021-04-14 | Spherical emergency cut-off valve |
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| Publication Number | Publication Date |
|---|---|
| CN112923097A true CN112923097A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110400599.8A Pending CN112923097A (en) | 2021-04-14 | 2021-04-14 | Spherical emergency cut-off valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115723943A (en) * | 2022-12-29 | 2023-03-03 | 重庆交通大学绿色航空技术研究院 | Double-layer multi-rotor-wing rotary locking device |
-
2021
- 2021-04-14 CN CN202110400599.8A patent/CN112923097A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115723943A (en) * | 2022-12-29 | 2023-03-03 | 重庆交通大学绿色航空技术研究院 | Double-layer multi-rotor-wing rotary locking device |
| CN115723943B (en) * | 2022-12-29 | 2023-09-19 | 重庆交通大学绿色航空技术研究院 | Double-deck many rotors rotatory locking device |
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