CN110220013B - Built-in anti-theft valve - Google Patents
Built-in anti-theft valve Download PDFInfo
- Publication number
- CN110220013B CN110220013B CN201910584094.4A CN201910584094A CN110220013B CN 110220013 B CN110220013 B CN 110220013B CN 201910584094 A CN201910584094 A CN 201910584094A CN 110220013 B CN110220013 B CN 110220013B
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
- F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
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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
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/027—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by pushing or pulling the valve actuator, the valve actuator being rotated subsequently to bring the valve closure element in the desired position
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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
- F16K35/10—Means to prevent accidental or unauthorised actuation with locking caps or locking bars
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The invention relates to a built-in anti-theft valve, which comprises a three-way plug valve fixed in a sampling tube, wherein the three-way plug valve comprises a valve body, a spherical valve core and a valve rod for controlling the spherical valve core, a sampling nipple is arranged in a radial output port of the three-way plug valve, the outer end of the sampling nipple extends out of the sampling tube along the radial direction of the sampling tube, a sheath is arranged at the periphery of the valve rod, the inner end of the sheath is in sealing connection with the valve body, the outer end of the sheath extends out of the sampling tube and exceeds the outer end of the valve rod, a valve rod square tenon is arranged at the outer end of the valve rod, and a sealing cover is screwed at the outer port of the sheath; the middle section of the sheath is provided with a fixed sleeve, the fixed sleeve and the sheath are coaxial, the valve rod penetrates out from the center of the bottom wall of the fixed sleeve, the top of the fixed sleeve is welded with the inner wall of the sampling tube, and the inner cavity of the fixed sleeve is provided with a valve rod control mechanism for controlling the valve rod to rotate. The valve rod control mechanism comprises a rotary core, a plurality of lock cavities are arranged in the rotary core, and a locking mechanism is arranged in the lock cavities. The built-in anti-theft valve is convenient to operate and good in anti-theft performance.
Description
Technical Field
The invention relates to a valve for an oil extraction plant, in particular to a built-in anti-theft valve, and belongs to the technical field of valves for oil extraction plants.
Background
At present, the sampling valve at the wellhead of an oil well is arranged on a vertical pipeline at the wellhead, any person on site can open the sampling valve by using a hand wheel or a wrench, and a thief can easily steal crude oil by opening the sampling valve, so that enterprises suffer unnecessary economic loss and the on site environmental pollution is easy to cause.
The Chinese patent application with the publication number of CN 104179500A discloses a built-in sampling device, which comprises a sampling tube, wherein two ends of the sampling tube are respectively connected with clamp heads, a three-way plug valve is fixed in the sampling tube and comprises a valve body, a spherical valve core and a valve rod, a horizontal inlet, a horizontal outlet on the same straight line with the horizontal inlet and a vertical outlet vertical to the horizontal inlet are arranged on the valve body, the horizontal inlet and the horizontal outlet of the three-way plug valve are coaxial with the sampling tube, a vertical output port of the three-way plug valve is connected with a sampling nipple, and the sampling nipple extends out of the sampling tube. The three-way plug valve is built-in, has a good heat preservation effect, is vertically arranged in the sampling nipple, does not leave residues in the sampling nipple after the sampling is completed, and avoids freezing blockage.
Because oil extraction plants are located in remote areas, the valve rod of the sampling valve is arranged in the sheath, but a thief can easily turn to the valve rod by adopting a simple tool to steal crude oil, so that the national assets are lost, and the improvement of the oil theft prevention performance of the sampling valve is a big problem of the oil extraction plants.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a built-in anti-theft valve which has anti-freezing and anti-theft performances and is convenient and quick to sample.
In order to solve the technical problems, the built-in anti-theft valve comprises a sampling pipe, a three-way plug valve is fixed in the sampling pipe, the three-way plug valve comprises a valve body, a spherical valve core and a valve rod for controlling the spherical valve core, a sampling nipple is arranged in a radial output port of the three-way plug valve, an outer end of the sampling nipple extends out of the sampling pipe along the radial direction of the sampling pipe, a sheath is arranged on the periphery of the valve rod, an inner end of the sheath is in sealing connection with the valve body, an outer end of the sheath extends out of the sampling pipe and beyond the outer end of the valve rod, a valve rod square tenon is arranged at the outer end of the valve rod, and a sealing cover is screwed on an outer port of the sheath.
Compared with the prior art, the invention has the following beneficial effects: the three-way plug valve comprises an axial inlet and an axial outlet which are positioned on the axis of the sampling tube, and the radial output port is perpendicular to the axis of the sampling tube. In a non-sampling state, the axial inlet and the axial outlet of the three-way plug valve are communicated; during sampling, the spherical valve core is rotated by the valve rod, so that the axial inlet is communicated with the radial output port, and crude oil flows out from the sampling nipple. The valve rod is positioned in the inner cavity of the sheath, so that freezing and blocking are avoided; because the valve rod square tenon is positioned in the inner cavity of the sheath, the sealing cover is required to be removed, an operator can insert the valve rod square tenon into the inner cavity of the sheath by means of a special tool, and the valve rod square tenon rotates the valve rod, so that the sample can be smoothly taken, and the valve rod square tenon has certain anti-theft capability.
As an improvement of the invention, the middle section of the sheath is provided with a fixed sleeve, the fixed sleeve and the sheath are coaxial, the valve rod penetrates out from the center of the bottom wall of the fixed sleeve, the top of the fixed sleeve is welded with the inner wall of the sampling tube, and the inner cavity of the fixed sleeve is provided with a valve rod control mechanism for controlling the valve rod to rotate. The valve rod square tenon is internally provided with a first oil-theft prevention measure, the valve rod control mechanism and the fixed sleeve are provided with a second oil-theft prevention measure, and even if a thief uses a self-made tool to sleeve the valve rod square tenon, the valve rod control mechanism can not be operated, so that the valve rod can not be rotated, and the anti-theft performance is better.
As a further improvement of the invention, the valve rod control mechanism comprises a rotating core coaxial with the fixed sleeve, the rotating core is in a T-shaped section, the large end of the rotating core is rotatably embedded in the inner cavity of the fixed sleeve, the small end of the rotating core is rotatably embedded in the inner cavity of the sheath, and the center of the rotating core is fixedly connected with the valve rod; the rotary core is internally provided with a plurality of rotary core lock cavities, and the rotary core lock cavities are internally provided with locking mechanisms capable of locking or unlocking the rotary core and the fixed sleeve. The rotary core with the T-shaped section automatically obtains axial positioning in the fixed sleeve, and only after the locking mechanism is unlocked, the rotary core can rotate in the fixed sleeve, and the valve rod can be operated to rotate because the rotary core is fixedly connected with the valve rod. When the locking mechanism is not unlocked, the rotary core is fixed in the fixed sleeve, and even if the valve rod is subjected to torsion, the rotary core still cannot be rotated.
As a further improvement of the invention, the core-rotating lock cavity comprises a first core-rotating cavity and a second core-rotating cavity which are communicated with each other, wherein the first core-rotating cavity extends along the axial direction of the small end of the core rotating, and the second core-rotating cavity extends along the radial direction of the large end of the core rotating; the locking mechanism comprises a pressing block, a connecting rod and a top block, wherein the pressing block is positioned in the first core rotating cavity and can slide along the axial direction of the first core rotating cavity, the top block is positioned in the second core rotating cavity and can slide along the radial direction of the second core rotating cavity, one end of the connecting rod is hinged with the inner end face of the pressing block, and the other end of the connecting rod is hinged with the inner end face of the top block; the fixed sleeve is internally provided with a plurality of fixed sleeve lock cavities extending along the radial direction of the fixed sleeve, each fixed sleeve lock cavity is coaxial with the corresponding second core rotating cavity and is communicated smoothly, each fixed sleeve lock cavity is internally provided with a locking piece capable of sliding along the fixed sleeve lock cavity, the core end face of each locking piece is propped against the corresponding jacking piece, and the back face of each locking piece is supported at the bottom of the fixed sleeve lock cavity through a locking piece spring. When the pressing block is extruded by external force, the pressing block slides along the large end direction of the rotating core along the first rotating core cavity, the top block is pushed to slide along the second rotating core cavity along the direction far away from the valve rod through the connecting rod, the locking block is extruded by the top block, the locking block is retracted in the fixed sleeve lock cavity along the direction far away from the axis of the valve rod, when the locking block just completely retracts into the fixed sleeve lock cavity, the contact surface of the locking block and the top block is just positioned on the interface of the rotating core and the fixed sleeve, namely, the locking block does not span between the interfaces of the rotating core and the fixed sleeve any more, and at the moment, the locking block is in an unlocking state. When each locking piece is in an unlocking state at the same time, the rotary core is unlocked, and the valve rod can rotate only when the rotary core is in the unlocking state. When the pressure on the pressing block disappears, the tension of the locking block spring pushes the locking block out, the locking block returns to a state crossing the interface between the rotating core and the fixed sleeve to lock the rotating core again, the top block is pushed by the locking block to slide along the second rotating core cavity towards the direction close to the valve rod, and the pressing block is pushed by the connecting rod to slide outwards along the first rotating core cavity to return to the position before being pressed. The rotary core can be reliably locked as long as one locking piece is positioned at the locking position; only if all the locking blocks are simultaneously positioned at the unlocking position, the rotary core can be unlocked, so that the anti-theft performance is excellent.
As a further improvement of the invention, pressing block springs are respectively arranged between the inner end face of each pressing block and the bottom wall of the rotary core, each pressing block spring is close to the valve rod, and the axis of each pressing block spring is parallel to the axis of the valve rod. When the pressing block is subjected to external pressure, the pressing block spring is compressed to store energy; when the pressure born by the pressing block disappears, the pressing block spring is pushed by the tension to automatically reset, and even if the valve is used for a long time, the pressing block can still move freely when a little rust occurs.
As a further improvement of the invention, the inner end surface of the pressing block is fixedly connected with an insertion pipe inserted into the pressing block spring, the inner cavity of the free end of the insertion pipe is inserted with an insertion rod coaxial with the insertion pipe, and the root of the insertion rod is fixedly connected to the bottom wall of the rotating core. When the pressing block is pressed to compress the pressing block spring, the depth of the free end of the inserted rod inserted into the insertion pipe is increased; when the pressing block is pressed and disappears, the pressing block spring pushes the pressing block to reset, and the inserting depth of the inserting rod in the insertion pipe becomes shallow; under the action of the insertion pipe and the insertion rod, the pressing block spring is always compressed or stretched along the axis of the pressing block spring, and the skew failure phenomenon can not occur.
As a further improvement of the invention, the periphery of the valve rod is provided with a valve rod groove extending along the axial direction of the valve rod, and the side surface of each pressing block contacted with the valve rod is respectively embedded in the corresponding valve rod groove. The valve rod groove plays a guiding role in sliding of the pressing block, and meanwhile, the step at the outer end of the valve rod groove limits the pressing block, so that the pressing block is prevented from continuously sliding outwards, and the outer limit position of the pressing block is formed.
As a further improvement of the invention, the locking mechanism is matched with a special spanner, the special spanner comprises a spanner body, a spanner hole which is matched with and communicated with the square tenon of the valve rod is arranged in the center of the spanner body, the outer end face of the spanner body is connected with a handle, and a spanner pressing rod which extends along the axial direction of the spanner hole is arranged on the circumference of the inner end face of the spanner body; when the spanner hole is sleeved on the valve rod square tenon and pushed to the bottom, the core-facing end surface of each locking block is flush with the core-facing side port of the fixed sleeve lock cavity. The operator holds the handle, aim at corresponding briquetting inwards extrusion with the spanner depression bar, the briquetting is forced the in-process of retreating, spanner hole cover is on valve rod square tenon and continue to advance to the root of valve rod square tenon, when spanner hole impels to the end, spanner depression bar impels the briquetting to interior extreme position, the briquetting is through the connecting rod with the kicking block impel in place this moment, the core terminal surface of each locking piece is parallel and level to the core side port of fixed sleeve lock chamber this moment, the core is in the unblock position promptly, rotate the handle and can twist valve rod square tenon and core, make the valve rod rotate spherical case to the oil position of taking a sample.
As a further improvement of the invention, the shape and the size of each pressing block are the same as the shape and the size of each jacking block, the lengths of each connecting rod are different, and the lengths of each spanner pressing rod are matched with the lengths of the corresponding connecting rods. Under the action of the tension of the pressing block springs, the initial positions of the pressing blocks can be the same or different; when the special spanner is used, the correct direction must be ensured, so that each spanner pressing rod is aligned with the pressing block of the connecting rod matched with the spanner pressing rod, after the special spanner is pressed down, the locking blocks in all directions can be ensured to be in an unlocking state at the same time, the valve rod can be rotated, and the anti-theft performance is better.
As a further improvement of the invention, the handle is provided with a hollowed-out handle frame, and the corner of the handle is provided with a marking block for indicating the insertion direction of the wrench. The handle frame is convenient for an operator to hold, and the marking block can prompt the operator to find the inserting direction of the special spanner at a time, so that excessive time is prevented from being delayed when the sample is formally taken.
As a further development of the invention, the lock chambers are distributed symmetrically in the rotor core. The rotating core can be rotated only when the four locking blocks are arranged and are in an unlocking state, so that the safety is improved.
As a further improvement of the invention, the outer end heads of the top blocks are respectively provided with top block mushroom heads with high middle and low periphery, and the end faces of the locking blocks facing the core are respectively provided with locking block mushroom heads with high middle and low periphery. The top block mushroom head and the locking block mushroom head not only ensure good contact between the top block and the locking block, but also allow reasonable errors in the positions of the locking blocks, namely if the top points of the locking blocks are not absolutely flush with the core-facing side ports of the fixed sleeve lock cavity, small errors exist, the outer ports of the second core rotating cavity are contacted with the cambered surfaces of the locking block mushroom head, and the locking blocks can be completely pushed into the fixed sleeve lock cavity, so that the rotating cores can rotate. Similarly, if the top block mushroom head slightly protrudes into the fixed sleeve lock cavity, when the rotary core rotates, the cambered surface of the top block mushroom head scrapes to the port of the fixed sleeve lock cavity and can be propped back into the second rotary core cavity; the problem that an operator can hardly open the three-way plug valve to sample due to too high matching precision is avoided.
Drawings
The invention will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the invention.
Fig. 1 is a schematic structural view of a built-in anti-theft valve according to the present invention.
Fig. 2 is an enlarged view of the portion a in fig. 1.
Fig. 3 is an enlarged view of the core portion of fig. 2.
Fig. 4 is a port view of the sheath of fig. 1 with the cover removed.
Fig. 5 is a front view of the special wrench.
Fig. 6 is a right side view of the wrench body of fig. 5.
In the figure: 1. a sampling tube; 2. a three-way plug valve; 2a, a valve body; 2b, a spherical valve core; 2c, valve rod; 2c1, valve rod square tenons; 2c2, a valve rod groove; 3. sampling pup joint; 4. a sheath; 5. a fixed sleeve; 5a, fixing a sleeve lock cavity; 6. rotating the core; 6a, a first rotating core cavity; 6b, a second rotating core cavity; 7. briquetting; 8. a connecting rod; 9. a top block; 9a, top mushroom head; 10. a briquetting spring; 10a, intubation; 10b, inserting a rod; 11. a locking piece; 11a, locking a mushroom head; 12. a lock block spring; 13. a cover; 14a, a wrench body; 14b, spanner holes; 14c, a spanner pressing rod; 14d, a handle; 14e, a handle frame; 14f. Marking the block.
Detailed Description
As shown in fig. 1 to 4, the built-in anti-theft valve of the invention comprises a sampling tube 1, a three-way plug valve 2 is fixed in the sampling tube 1, the three-way plug valve 2 comprises a valve body 2a, a spherical valve core 2b and a valve rod 2c for controlling the spherical valve core 2b, a sampling nipple 3 is arranged in a radial output port of the three-way plug valve 2, an outer end of the sampling nipple 3 extends out of the sampling tube 1 along the radial direction of the sampling tube 1, a sheath 4 is arranged at the periphery of the valve rod 2c, an inner end of the sheath 4 is in sealing connection with the valve body 2a, an outer end of the sheath 4 extends out of the sampling tube 1 and exceeds an outer end of the valve rod 2c, a valve rod square tenon 2c1 is arranged at the outer end of the valve rod 2c, and a sealing cover 13 is screwed at an outer port of the sheath 4.
The three-way plug valve 2 comprises an axial inlet and an axial outlet which are positioned on the axis of the sampling tube, and the radial output port is perpendicular to the axis of the sampling tube. In the non-sampling state, the axial inlet and the axial outlet of the three-way plug valve 2 are communicated; during sampling, the spherical valve core 2b is rotated through the valve rod 2c, so that the axial inlet is communicated with the radial outlet, and crude oil flows out from the sampling nipple 3. The valve rod 2c is positioned in the inner cavity of the sheath 4, so that freezing and blocking are avoided; because the valve rod square tenon 2c1 is positioned in the inner cavity of the sheath 4, the sealing cover 13 must be removed, an operator can insert the valve rod square tenon 2c into the inner cavity of the sheath by means of a special tool, and the valve rod square tenon 2c1 rotates the valve rod 2c, so that the sample can be smoothly sampled, and the anti-theft device has a certain anti-theft capability.
The middle section of sheath 4 is equipped with fixed cover 5, and fixed cover 5 and sheath 4 coaxial line, valve rod 2c wear out from fixed cover 5 diapire center, and fixed cover 5's top welds with sampling tube 1's inner wall mutually, and fixed cover 5's inner chamber is equipped with control valve rod 2c pivoted valve rod control mechanism. The valve rod square tenon 2c1 is internally provided with a first oil-theft prevention measure, the fixed sleeve 5 and the valve rod control mechanism are provided with a second oil-theft prevention measure, and even if a thief uses a self-made tool to sleeve the valve rod square tenon 2c1, the valve rod control mechanism can not be operated, so that the valve rod 2c can not be rotated, and the anti-theft performance is better.
The valve rod control mechanism comprises a rotating core 6 coaxial with the fixed sleeve 5, the rotating core 6 is of a T-shaped section, the large end of the rotating core 6 is rotatably embedded in the inner cavity of the fixed sleeve 5, the small end of the rotating core 6 is rotatably embedded in the inner cavity of the sheath 4, and the center of the rotating core 6 is fixedly connected with the valve rod 2 c; the rotary core 6 is provided with a plurality of rotary core lock cavities, and a locking mechanism capable of locking or unlocking the rotary core 6 and the fixed sleeve 5 is arranged in the rotary core lock cavities. The rotating core 6 with the T-shaped section automatically obtains axial positioning in the fixed sleeve 5, and the rotating core 6 can rotate in the fixed sleeve 5 only after the locking mechanism is unlocked, and the valve rod 2c can be operated to rotate because the rotating core 6 is fixedly connected with the valve rod 2c. When the locking mechanism is not unlocked, the rotary core 6 is fixed in the fixed sleeve 5, and cannot be rotated even if the valve stem 2c is subjected to torsion.
The rotary core lock cavity comprises a first rotary core cavity 6a and a second rotary core cavity 6b which are communicated with each other, the first rotary core cavity 6a extends along the axial direction of the small end of the rotary core, and the second rotary core cavity 6b extends along the radial direction of the large end of the rotary core; the locking mechanism comprises a pressing block 7, a connecting rod 8 and a top block 9, wherein the pressing block 7 is positioned in the first core rotating cavity 6a and can slide along the axial direction of the first core rotating cavity 6a, the top block 9 is positioned in the second core rotating cavity 6b and can slide along the radial direction of the second core rotating cavity 6b, one end of the connecting rod 8 is hinged with the inner end surface of the pressing block 7, and the other end of the connecting rod 8 is hinged with the inner end surface of the top block 9.
The fixed sleeve 5 is provided with a plurality of fixed sleeve lock cavities 5a extending along the radial direction of the fixed sleeve 5, each fixed sleeve lock cavity 5a is coaxial with and is communicated with a corresponding second core rotating cavity 6b in a smooth way, each fixed sleeve lock cavity 5a is provided with a locking piece 11 capable of sliding along the fixed sleeve lock cavity 5a, the core-facing end surface of each locking piece 11 abuts against a corresponding jacking piece 9, and the back surface of each locking piece 11 is supported at the bottom of the fixed sleeve lock cavity 5a through a locking piece spring 12.
When the pressing block 7 is extruded by external force, the pressing block slides along the first core rotating cavity 6a towards the large end direction of the core rotating cavity 6, the top block 9 is pushed by the connecting rod 8 to slide along the second core rotating cavity 6b towards the direction away from the valve rod 2c, the locking block 11 is extruded by the top block 9, the locking block is retracted in the fixed sleeve locking cavity 5a towards the direction away from the axis of the valve rod, when the locking block 11 is just retracted into the fixed sleeve locking cavity 5a, the contact surface of the locking block 11 and the top block 9 is just positioned on the interface between the core rotating cavity 6 and the fixed sleeve 5, namely, the locking block 11 does not span between the interface between the core rotating cavity 6 and the fixed sleeve 5 any more, and at the moment, the locking block 11 is in an unlocking state. When the locking blocks 11 are in the unlocking state at the same time, the rotary core 6 is unlocked, and the valve rod 2c can rotate only when the rotary core 6 is in the unlocking state.
When the pressure on the pressing block 7 disappears, the tension of the locking block spring 12 pushes out the locking block 11, the locking block 11 returns to a state crossing the interface between the rotating core 6 and the fixed sleeve 5 to lock the rotating core 6 again, the top block 9 is pushed by the locking block 11 to slide along the second rotating core cavity 6b towards the direction close to the valve rod 2c, and the pressing block 7 is pushed by the connecting rod 8 to slide outwards along the first rotating core cavity 6a to return to the position before being pressed. As long as one locking piece 11 is in the locking position, the rotary core 6 can be reliably locked; only if all the locking blocks 11 are simultaneously in the unlocking position, the rotary core 6 can be unlocked, so that the anti-theft performance is excellent.
A pressing block spring 10 is respectively arranged between the inner end surface of each pressing block 7 and the bottom wall of the rotary core 6, each pressing block spring 10 is close to the valve rod 2c, and the axis of each pressing block spring 10 is parallel to the axis of the valve rod 2c. When the pressing block 7 is subjected to external pressure, the pressing block spring 10 is compressed to store energy; when the pressure applied to the pressing block 7 disappears, the pressing block 7 is pushed by the tension of the pressing block spring 10 to automatically reset, and even if the valve is used for a long time and a little rust occurs, the pressing block 7 can still move freely.
The inner end surface of the pressing block 7 is fixedly connected with a cannula 10a inserted into the pressing block spring 10, the inner cavity of the free end of the cannula 10a is inserted with a plunger 10b coaxial with the cannula 10a, and the root of the plunger 10b is fixedly connected to the bottom wall of the rotary core 6. When the pressing block 7 is pressed to compress the pressing block spring 10, the free end of the inserted rod 10b is inserted into the insertion tube 10a to a deeper depth; when the pressing block 7 is pressed and disappears, the pressing block spring 10 pushes the pressing block 7 to reset, and the insertion depth of the inserted rod 10b in the insertion tube 10a becomes shallow; under the action of the insertion tube 10a and the insertion rod 10b, the pressing block spring 10 is always compressed or stretched along the axis of the pressing block spring, and no skew failure phenomenon occurs.
The outer periphery of the valve rod 2c is provided with a valve rod groove 2c2 extending along the axial direction of the valve rod, and the side surface of each pressing block 7 contacted with the valve rod 2c is respectively embedded in the corresponding valve rod groove 2c. The valve rod groove 2c2 plays a guiding role in sliding of the pressing block 7, and meanwhile, the step at the outer end of the valve rod groove 2c2 limits the pressing block 7, so that the pressing block 7 is prevented from continuously sliding outwards, and the outer limit position of the pressing block 7 is formed.
As shown in fig. 5 and 6, the locking mechanism is matched with a special wrench, the special wrench comprises a wrench body 14a, a wrench hole 14b which is matched with and penetrates through a valve rod square tenon 2c1 is formed in the center of the wrench body 14a, a handle 14d is connected to the outer end face of the wrench body 14a, and a wrench pressing rod 14c which extends along the axis direction of the wrench hole 14b is arranged on the circumference of the inner end face of the wrench body 14 a; when the spanner hole 14b is sleeved on the valve rod square tenon 2c1 and pushed to the bottom, the core-facing end surface of each lock block 11 is flush with the core-facing side port of the fixed sleeve lock cavity 5a.
The operator holds the handle 14d and inwardly extrudes the spanner pressing rod 14c aiming at the corresponding pressing block 7, in the process that the pressing block 7 is forced to retreat, the spanner hole 14b is sleeved on the valve rod square tenon 2c1 and continuously pushes the spanner pressing rod to the root of the valve rod square tenon 2c1, when the spanner hole 14b is pushed to the bottom, the spanner pressing rod 14c pushes the pressing block 7 to the inner limit position, at the moment, the pressing block 7 pushes the jacking block 9 to the position through the connecting rod 8, at the moment, the core-facing end face of each locking block 11 is flush with the core-facing side port of the fixed sleeve locking cavity 5a, namely, the rotary core 6 is in the unlocking position, and the valve rod square tenon 2c1 and the rotary core 6 can be screwed by rotating the handle 14d, so that the valve rod 2c rotates the spherical valve core 2b to the sampling oil outlet position.
The shape and the size of each pressing block 7 and the top block 9 are the same, the lengths of each connecting rod 8 are different, and the length of each spanner pressing rod 14c is matched with the length of the corresponding connecting rod 8. Under the action of the tension of the pressing block springs 10, the initial positions of the pressing blocks 7 can be the same or different; when the special spanner is used, the correct direction must be ensured, so that each spanner pressing rod 14c is aligned with the pressing block 7 of the connecting rod 8 matched with the spanner pressing rod, after the special spanner is pressed down, the locking blocks 11 in all directions can be ensured to be in an unlocking state at the same time, the valve rod 2c can be rotated, and the anti-theft performance is better.
The handle 14d is provided with a hollowed handle frame 14e, and the corners of the handle 14d are provided with marking blocks 14f for indicating the insertion direction of the wrench. The handle frame 14e is convenient for an operator to hold, and the marking block 14f can prompt the operator to find the inserting direction of the special spanner at a time, so that excessive time delay during formal sampling is avoided.
Four lock cavities are symmetrically distributed in the rotary core 6. The rotating core 6 can be rotated only when the four locking blocks 11 are arranged and are in an unlocking state, so that the safety is improved.
The outer end of each top block 9 is respectively provided with a top block mushroom head 9a with high middle and low periphery, and the end face of each locking block 11 facing the core is respectively provided with a locking block mushroom head 11a with high middle and low periphery. The top block mushroom head 9a and the locking block mushroom head 11a not only ensure good contact between the top block 9 and the locking block 11, but also allow reasonable errors in the position of the locking block 11, that is, if the top point of the locking block 11 is not absolutely flush with the core-facing side port of the fixed sleeve lock cavity 5a, but there is a small error, the outer port of the second core rotating cavity 6b contacts with the cambered surface of the locking block mushroom head 11a, so that the locking block 11 can be completely pushed into the fixed sleeve lock cavity 5a, and the core rotating 6 can rotate. Similarly, if the top block mushroom head 9a slightly protrudes into the fixed sleeve lock cavity 5a, when the rotary core 6 rotates, the cambered surface of the top block mushroom head 9a scrapes the port of the fixed sleeve lock cavity 5a and can be pushed back into the second rotary core cavity 6 b; the problem that an operator can hardly open the three-way plug valve 2 to sample due to too high matching precision is avoided.
The foregoing description is only of a preferred embodiment of the invention and is not intended to limit the scope of the invention. In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention. The technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein.
Claims (8)
1. The utility model provides a built-in theftproof valve, includes the three-way plug valve that is fixed in the sampling tube, the three-way plug valve includes valve body, spherical case and the valve rod of the spherical case of control, install the sample nipple joint in the radial delivery outlet of three-way plug valve, the outer end of sample nipple joint is outside the radial stretch out the sampling tube of sampling tube along the sampling tube, its characterized in that: the periphery of the valve rod is provided with a sheath, the inner end head of the sheath is in sealing connection with the valve body, the outer end head of the sheath extends out of the sampling tube and exceeds the outer end head of the valve rod, the outer end head of the valve rod is provided with a valve rod square tenon, and the outer port of the sheath is in screwed connection with a sealing cover;
the middle section of the sheath is provided with a fixed sleeve, the fixed sleeve and the sheath are coaxial, the valve rod penetrates out from the center of the bottom wall of the fixed sleeve, the top of the fixed sleeve is welded with the inner wall of the sampling tube, and the inner cavity of the fixed sleeve is provided with a valve rod control mechanism for controlling the valve rod to rotate;
the valve rod control mechanism comprises a rotating core coaxial with the fixed sleeve, the rotating core is of a T-shaped section, the large end of the rotating core is rotatably embedded in the inner cavity of the fixed sleeve, the small end of the rotating core is rotatably embedded in the inner cavity of the sheath, and the center of the rotating core is fixedly connected with the valve rod; a plurality of rotating core lock cavities are arranged in the rotating core, and a locking mechanism capable of locking or unlocking the rotating core and the fixed sleeve is arranged in the rotating core lock cavities;
the rotary core lock cavity comprises a first rotary core cavity and a second rotary core cavity which are communicated with each other, the first rotary core cavity extends along the axial direction of the small end of the rotary core, and the second rotary core cavity extends along the radial direction of the large end of the rotary core; the locking mechanism comprises a pressing block, a connecting rod and a top block, wherein the pressing block is positioned in the first core rotating cavity and can slide along the axial direction of the first core rotating cavity, the top block is positioned in the second core rotating cavity and can slide along the radial direction of the second core rotating cavity, one end of the connecting rod is hinged with the inner end face of the pressing block, and the other end of the connecting rod is hinged with the inner end face of the top block; the fixed sleeve is internally provided with a plurality of fixed sleeve lock cavities extending along the radial direction of the fixed sleeve, each fixed sleeve lock cavity is coaxial with the corresponding second core rotating cavity and is communicated smoothly, each fixed sleeve lock cavity is internally provided with a locking piece capable of sliding along the fixed sleeve lock cavity, the core-facing end surface of each locking piece is abutted against the corresponding jacking piece, and the back surface of each locking piece is supported at the bottom of the fixed sleeve lock cavity through a locking piece spring;
and a pressing block spring is respectively arranged between the inner end face of each pressing block and the bottom wall of the rotary core, each pressing block spring is close to the valve rod, and the axis of each pressing block spring is parallel to the axis of the valve rod.
2. The internal antitheft valve of claim 1 wherein: the inner end face of the pressing block is fixedly connected with an insertion pipe inserted into the pressing block spring, an insertion rod coaxial with the insertion pipe is inserted into the inner cavity of the free end of the insertion pipe, and the root of the insertion rod is fixedly connected to the bottom wall of the rotating core.
3. The internal antitheft valve of claim 1 wherein: the periphery of the valve rod is provided with a valve rod groove extending along the axial direction of the valve rod, and the side surfaces of the pressing blocks, which are contacted with the valve rod, are respectively embedded in the corresponding valve rod groove.
4. The internal antitheft valve of claim 1 wherein: the locking mechanism is matched with a special spanner, the special spanner comprises a spanner body, a spanner hole which is matched with and communicated with the square tenon of the valve rod is formed in the center of the spanner body, the outer end face of the spanner body is connected with a handle, and a spanner pressing rod which extends along the axis direction of the spanner hole is arranged on the circumference of the inner end face of the spanner body; when the spanner hole is sleeved on the valve rod square tenon and pushed to the bottom, the core-facing end surface of each locking block is flush with the core-facing side port of the fixed sleeve lock cavity.
5. The internal antitheft valve of claim 4 wherein: the shape size of each briquetting is the same with the shape size of kicking block, and the length of each connecting rod is different, and the length of each spanner pressing rod and the length looks adaptation of corresponding connecting rod.
6. The internal antitheft valve of claim 5 wherein: the handle is provided with a hollowed handle frame, and the corner of the handle is provided with a marking block for indicating the insertion direction of the wrench.
7. The in-built antitheft valve according to any one of claims 1 to 6, characterized in that: the lock cavities are symmetrically distributed in the rotary core.
8. The in-built antitheft valve according to any one of claims 1 to 6, characterized in that: the outer end of each ejector block is respectively provided with an ejector block mushroom head with high middle and low periphery, and the end face of each locking block facing the core is respectively provided with a locking block mushroom head with high middle and low periphery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584094.4A CN110220013B (en) | 2019-07-01 | 2019-07-01 | Built-in anti-theft valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584094.4A CN110220013B (en) | 2019-07-01 | 2019-07-01 | Built-in anti-theft valve |
Publications (2)
| Publication Number | Publication Date |
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| CN110220013A CN110220013A (en) | 2019-09-10 |
| CN110220013B true CN110220013B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910584094.4A Active CN110220013B (en) | 2019-07-01 | 2019-07-01 | Built-in anti-theft valve |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111895137A (en) * | 2020-06-22 | 2020-11-06 | 安徽创华自控仪表设备有限公司 | Fluorine-lined ball valve |
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| CN103266866A (en) * | 2013-03-01 | 2013-08-28 | 中国石油天然气股份有限公司 | Key needle tube type anti-theft anti-freezing sampling valve |
| CN104179500A (en) * | 2014-07-25 | 2014-12-03 | 中国石油化工股份有限公司 | Built-in type sampling device |
| CN206770654U (en) * | 2017-05-05 | 2017-12-19 | 王毅黎 | A kind of Anti-theft ball valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9212758B2 (en) * | 2012-12-31 | 2015-12-15 | Ge Oil & Gas Pressure Control Lp | Quick connect valve actuator |
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| JPH07190242A (en) * | 1993-12-24 | 1995-07-28 | Hanshin Koki Kk | Radiator valve for electrical equipment of transformer and the like |
| CN201412599Y (en) * | 2008-10-30 | 2010-02-24 | 王福和 | Anti-theft lock for valve switch |
| CN103266866A (en) * | 2013-03-01 | 2013-08-28 | 中国石油天然气股份有限公司 | Key needle tube type anti-theft anti-freezing sampling valve |
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| CN110220013A (en) | 2019-09-10 |
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