CN111396582A

CN111396582A - Invisible anti-theft gate valve

Info

Publication number: CN111396582A
Application number: CN202010220362.7A
Authority: CN
Inventors: 章海滨; 蔡小飞; 马军涛; 杨荣; 徐力
Original assignee: Ningbo Jklong Precision Work Co ltd
Current assignee: Ningbo Jklong Precision Work Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-10
Anticipated expiration: 2040-03-25
Also published as: CN111396582B

Abstract

The invention discloses a hidden anti-theft gate valve, which comprises: a valve body; the gate plate is matched with the valve body in a plugging way; the cover body is arranged on the valve body; the upper end of the lower valve rod is movably matched with the cover body, the lower end of the lower valve rod is fixedly connected with the flashboard, and the upper end of the lower valve rod is provided with two baffle tables; the lower end of the upper valve rod is movably matched with the cover body, and the lower end of the upper valve rod is provided with a locking block which is in locking fit with the two baffles; the first spring is abutted between the upper valve rod and the lower valve rod; the locking piece is operable to be located at a first position and a second position, when the locking piece moves from the first position to the second position, the first spring is compressed by the upper valve rod, the locking piece and the two blocking platforms are axially limited and locked, when the locking piece moves from the second position to the first position, the locking piece and the two blocking platforms are separated from limiting and locking, and the upper valve rod resets through the elastic force of the first spring. The invention has convenient operation, realizes theft prevention by adopting a split valve rod mode and has better theft prevention performance.

Description

Invisible anti-theft gate valve

Technical Field

The invention relates to the technical field of valves, in particular to a hidden anti-theft gate valve.

Background

The valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, and comprises a ball valve, a gate valve, a butterfly valve, a stop valve and the like. The gate valve is a valve in which a gate plate vertically moves along the axis of a passage, and is mainly used as a cutting medium in a pipeline. The gate valve can be divided into a rising stem gate valve and a non-rising stem gate valve according to different movement modes. The gate plate of the gate valve moves linearly along with the valve rod, which is called a rising stem gate valve. The gate valve is called a rotary rod gate valve or a hidden rod gate valve. The inside screw rod gate valve has small installation space and is suitable for large caliber gate valve with limited installation space.

At present, various anti-theft valves are widely applied in order to prevent other people from opening and closing the valves at will and improve the anti-theft performance of the valves. However, the anti-theft valve in the industry has the problems of poor anti-theft performance, complex structure, inconvenient operation and the like.

Disclosure of Invention

Aiming at the problems that the existing anti-theft valve has poor anti-theft performance or has a complex structure and is inconvenient to operate, the invisible anti-theft gate valve is provided, has a simple structure and convenient operation, realizes anti-theft by adopting a split valve rod, and has better anti-theft performance.

The specific technical scheme is as follows:

a concealed antitheft gate valve comprising:

the valve body is internally provided with a flow passage;

the gate plate is movably arranged in the valve body and is matched with the flow passage in a plugging way;

the cover body is arranged on the valve body;

the upper end of the lower valve rod is movably matched with the cover body, the lower end of the lower valve rod is fixedly connected with the flashboard, and two blocking platforms are arranged at the upper end of the lower valve rod;

the lower end of the upper valve rod is movably matched with the cover body, the lower end of the upper valve rod is provided with a locking block, and the locking block is in locking fit with the two blocking platforms;

the first spring is abutted between the upper valve rod and the lower valve rod;

the locking piece is operable to be located at a first position and a second position, when the locking piece moves from the first position to the second position, the first spring is compressed by the upper valve rod, the locking piece is axially limited and locked with the two blocking platforms, when the locking piece moves from the second position to the first position, the locking piece is separated from the two blocking platforms for limiting and locking, and the upper valve rod is reset through the elastic force of the first spring.

Above-mentioned stealthy theftproof gate valve, wherein, the locking piece includes: the upper end of the connecting column is fixedly connected with the middle part of the lower end of the upper valve rod, and the two lugs are respectively and fixedly connected with the periphery of the lower end of the connecting column;

at least one end of each baffle table is provided with a baffle groove, the baffle groove is positioned at one side of the baffle table close to the lower valve rod, a channel is formed between two ends of the two baffle tables, and the two channels are respectively communicated with the two baffle grooves;

when the locking block moves from the first position to the second position, the first spring is compressed by the upper valve rod, the two lugs respectively extend into the two blocking grooves, and the locking block and the two blocking platforms are axially limited and locked;

when the locking block moves from the second position to the first position, the two lugs are separated from the two channels respectively, the locking block is separated from the two blocking platforms for limiting and locking, and the upper valve rod is reset through the elasticity of the first spring.

The invisible anti-theft gate valve is characterized in that a first convex ring is arranged on the periphery of the lower end of the upper valve rod, a second convex ring is arranged on the periphery of the upper end of the lower valve rod, a containing groove is formed in the cover body, the first convex ring is in limit fit with the upper end of the containing groove, the second convex ring is in limit fit with the lower end of the containing groove, the first spring is located on the outer side of the blocking platform, and two ends of the first spring are abutted between the first convex ring and the second convex ring.

The cover body comprises the valve cover and the gland which are connected with each other, the valve cover is arranged on the valve body, the gland is arranged on the valve cover, and the accommodating groove is formed between the gland and the valve cover.

The invisible anti-theft gate valve further comprises: an opening degree indicating mechanism, the opening degree indicating mechanism comprising:

the transmission ring is in threaded connection with the upper end of the upper valve rod;

the indicating ring is movably matched with the cover body, at least one first guide groove is formed in the outer periphery of the cover body along the axial direction of the cover body, an open position indicating mark and a closed position indicating mark are sequentially arranged on the outer periphery of the cover body from top to bottom, at least one indicating assembly is arranged on the inner periphery of the indicating ring, and the indicating assembly is in sliding fit with the first guide groove;

and the connecting blocks are clamped and in sliding fit with the upper ends of the transmission ring and the indicating ring respectively.

The invisible anti-theft gate valve, wherein the indicating component comprises: the inner periphery of the lower end of the indicating ring is provided with a mounting groove, the second spring is mounted in the mounting groove, two ends of the second spring are respectively abutted between the mounting groove and the ball body, and the ball body is in sliding fit with the first guide groove.

In the invisible anti-theft gate valve, at least one second guide groove is formed in the inner periphery of the indicating ring along the axial direction of the indicating ring, and the second guide groove is matched with the first guide groove.

Foretell stealthy theftproof gate valve, wherein, the periphery of lid is from last to being equipped with first annular and second annular down in proper order, first annular does open position indicator, the second annular does close position indicator, the spheroid with first annular or second annular sliding fit.

Foretell stealthy theftproof gate valve, wherein, the upper end of transmission circle is followed transmission circle radially sets up first draw-in groove, the upper end of instructing the circle is followed the radial second draw-in groove that sets up of instructing the circle, first draw-in groove the second draw-in groove respectively with connecting block joint and sliding fit, the longitudinal section of connecting block is "protruding" font setting, first draw-in groove the cross-section of second draw-in groove all is "protruding" font setting, the upper end protrusion of connecting block the transmission circle with the up end of instructing the circle.

In the invisible anti-theft gate valve, the periphery of the lower end of the transmission ring is provided with the third annular groove, the inner periphery of the indication ring is provided with the third convex ring, and the third convex ring is in limit fit with the third annular groove along the axis of the transmission ring.

Compared with the prior art, the technical scheme has the positive effects that:

the invention adopts the form of a split valve rod, when the gate valve needs to be opened and closed, the valve rod is pressed downwards, the first spring is compressed, the two lugs of the locking block respectively extend into the two channels, the upper valve rod is rotated by a certain angle, the lugs extend into the blocking grooves until the side walls of the lugs are abutted against the side walls of the blocking grooves on which the blocking platforms are positioned, the circumferential limit is realized, the upper valve rod is released, the upper surface of the lugs of the locking block and the upper surface of the blocking grooves on which the blocking platforms are positioned are subjected to limit locking, the locking block of the upper valve rod and the two blocking platforms of the lower valve rod are subjected to axial limit locking, the upper valve rod is continuously rotated to drive the lower valve rod to open and close the flash; when the gate valve does not need to be operated, the upper valve rod rotates by a certain angle, the lugs of the locking block are separated from the blocking grooves of the blocking table, and after the upper valve rod is released, the two lugs of the locking block are separated from the two channels respectively, so that the upper valve rod fails in transmission, the hand wheel idles, the connecting channel cannot be found at the first time, and the anti-theft function of the gate valve is realized. The integral structure of the invention only improves the interior of the gate valve, has the same appearance as the common gate valve, and has the invisible anti-theft function. The anti-theft valve is simple in structure and convenient to operate, adopts a split valve rod mode to realize anti-theft, and has good anti-theft performance.

Drawings

FIG. 1 is a schematic view of the overall structure of a concealed anti-theft gate valve in a normal open/close state;

FIG. 2 is a schematic view of the overall structure of the invisible anti-theft gate valve in a locking state;

FIG. 3 is a schematic view of the overall structure of the invisible anti-theft gate valve of the present invention;

FIG. 4 is a schematic structural view of a locking block of an upper stem of the invisible anti-theft gate valve of the present invention;

FIG. 5 is a schematic structural view of a blocking platform of a lower valve rod of the invisible anti-theft gate valve of the present invention;

FIG. 6 is a schematic structural view of an opening indicating mechanism of the invisible anti-theft gate valve of the present invention;

FIG. 7 is a schematic structural view of a gland of the invisible anti-theft gate valve of the present invention;

FIG. 8 is a schematic structural view of an indicating ring of the invisible anti-theft gate valve of the present invention;

FIG. 9 is a schematic structural view of a driving ring of the invisible anti-theft gate valve of the present invention;

FIG. 10 is a schematic structural view of a connecting block of the invisible anti-theft gate valve of the present invention;

FIG. 11 is a partial schematic structural view of the invisible anti-theft gate valve shown in FIG. 1;

FIG. 12 is a partial schematic structural view of the invisible anti-theft gate valve shown in FIG. 2;

in the drawings: 1. a valve body; 2. a shutter plate; 3. a cover body; 4. a lower valve stem; 5. an upper valve stem; 6. a first spring; 7. a flow channel; 8. blocking the platform; 9. a locking block; 10. connecting columns; 11. a lug; 12. a baffle groove; 13. a channel; 14. a first convex ring; 15. a second convex ring; 16. a containing groove; 17. a flat bearing; 18. a gasket; 19. a valve cover; 20. a gland; 21. a seal ring; 22. an opening degree indicating mechanism; 23. a drive ring; 24. an indication ring; 25. connecting blocks; 26. a first guide groove; 27. an indicating component; 28. a second spring; 29. a sphere; 30. mounting grooves; 31. a second guide groove; 32. a first ring groove; 33. a second ring groove; 34. a first card slot; 35. a second card slot; 36. a clamping part; 37. a nose bar portion; 38. a third ring groove; 39. a third convex ring; 40. mounting blocks; 41. a screw; 42. a handwheel.

Detailed Description

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

Fig. 1 is an overall structural schematic view of a normal open/close state of a concealed antitheft gate valve of the present invention, fig. 2 is an overall structural schematic view of a locked state of a concealed antitheft gate valve of the present invention, fig. 3 is an overall structural schematic view of a concealed antitheft gate valve of the present invention, fig. 4 is a structural schematic view of a locking piece of an upper valve stem of a concealed antitheft gate valve of the present invention, fig. 5 is a structural schematic view of a stopper of a lower valve stem of a concealed antitheft gate valve of the present invention, fig. 6 is a structural schematic view of an opening degree indicating mechanism of a concealed antitheft gate valve of the present invention, fig. 7 is a structural schematic view of a gland of a concealed antitheft gate valve of the present invention, fig. 8 is a structural schematic view of an indicating ring of a concealed antitheft gate valve of the present invention, fig. 9 is a structural schematic view of a driving ring of a concealed antitheft gate valve of the present invention, fig. 10 is a structural schematic view of a, fig. 11 is a partial structural view of a concealed type anti-theft gate valve of the present invention shown in fig. 1, and fig. 12 is a partial structural view of a concealed type anti-theft gate valve of the present invention shown in fig. 2, and fig. 1 to 12 show a concealed type anti-theft gate valve according to a preferred embodiment, including: valve body 1, flashboard 2, lid 3, lower valve rod 4, go up valve rod 5 and first spring 6, form runner 7 in the valve body 1, flashboard 2 activity is located in the valve body 1, and with 7 shutoff cooperations of runner, lid 3 is installed on valve body 1, the upper end and the lid 3 clearance fit of lower valve rod 4, the lower extreme and the flashboard 2 fixed connection of lower valve rod 4, the upper end of lower valve rod 4 is equipped with two and keeps off platform 8, the lower extreme and the lid 3 clearance fit of last valve rod 5, the lower extreme of going up valve rod 5 is equipped with locking piece 9, locking piece 9 and two keep off platform 8 locking cooperations, first spring 6 supports to locate between last valve rod 5 and the lower valve rod 4.

Preferably, the shutter 2 is movable in the radial direction of the valve body 1.

Further, as a preferred embodiment, the locking piece 9 is operable to be in a first position and a second position, when the locking piece 9 moves from the first position to the second position, the first spring 6 is compressed by the upper valve rod 5, the locking piece 9 is axially locked with the two blocking platforms 8 in a limiting manner, when the locking piece 9 moves from the second position to the first position, the locking piece 9 is disengaged from the two blocking platforms 8 in the limiting manner, and the upper valve rod 5 is reset by the elastic force of the first spring 6.

Further, as a preferred embodiment, the locking piece 9 includes: the upper end of the connecting column 10 is fixedly connected with the middle of the lower end of the upper valve rod 5, and the two lugs 11 are respectively and fixedly connected with the periphery of the lower end of the connecting column 10.

Further, as a preferred embodiment, at least one end of each of the blocking platforms 8 is provided with a blocking groove 12, the blocking groove 12 is located on one side of the blocking platform 8 close to the lower valve rod 4, a channel 13 is formed between two ends of each of the blocking platforms 8, and the two channels 13 are respectively communicated with the two blocking grooves 12.

Further, as a preferred embodiment, when the locking block 9 moves from the first position to the second position, the first spring 6 is compressed by the upper valve rod 5, the two lugs 11 respectively extend into the two retaining grooves 12, and the locking block 9 and the two retaining platforms 8 are axially limited and locked; when the locking block 9 moves from the second position to the first position, the two lugs 11 are separated from the two channels 13 respectively, the locking block 9 is separated from the two blocking platforms 8 for limiting and locking, and the upper valve rod 5 is reset through the elasticity of the first spring 6.

Preferably, the two abutment stages 8 are located symmetrically around the upper end of the lower stem 4 along the central axis of the lower stem 4.

Preferably, the two lugs 11 are symmetrically located on the periphery of the lower end of the connecting column 10.

Preferably, two ends of each baffle table 8 are provided with baffle grooves 12, the two baffle grooves 12 are symmetrically located at the end portions of the two ends of the baffle table 8, one baffle groove 12 of one baffle table 8 and one baffle groove 12 of the other baffle table 8 are respectively communicated with one channel 13, and the other baffle groove 12 of the one baffle table 8 and the other baffle groove 12 of the other baffle table 8 are respectively communicated with the other channel 13.

Preferably, when the upper valve rod 5 is pressed down, the two lugs 11 respectively enter the two passages 13, the upper valve rod 5 rotates, and through the rotating direction of the upper valve rod 5, the two lugs 11 respectively extend into one blocking groove 12 of one blocking platform 8 and the other blocking groove 12 of the other blocking platform 8, or the two lugs 11 respectively extend into the other blocking groove 12 of the one blocking platform 8 and the one blocking groove 12 of the other blocking platform 8, so that the convenience of operation is improved.

Preferably, the abutment 8 is arranged in an arc shape along the circumferential direction of the lower valve stem 4.

The above are merely preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.

The present invention also has the following embodiments in addition to the above:

in a further embodiment of the present invention, please refer to fig. 1 to 12, wherein a first protruding ring 14 is disposed on an outer periphery of a lower end of the upper valve rod 5, a second protruding ring 15 is disposed on an outer periphery of an upper end of the lower valve rod 4, an accommodating groove 16 is formed in the cover body 3, the first protruding ring 14 is in limit fit with an upper end of the accommodating groove 16, the second protruding ring 15 is in limit fit with a lower end of the accommodating groove 16, the first spring 6 is located on an outer side of the stop 8, and two ends of the first spring 6 are abutted between the first protruding ring 14 and the second protruding ring 15.

Preferably, the second protruding ring 15 is provided with a flat bearing 17, the flat bearing 17 abuts against the lower end of the first spring 6, and when the upper valve rod 5 and the lower valve rod 4 rotate, the flat bearing 17 can prevent the first spring 6 from being stressed and twisted.

Preferably, the periphery of the upper valve rod 5 is sleeved with a gasket 18, the gasket 18 is located on the upper end face of the first convex ring 14, and the gasket 18 is in limit fit with the upper end of the accommodating groove 16, so that hard collision and friction between the upper valve rod 5 and the gland 20 can be avoided.

Preferably, the gasket is a polytetrafluoroethylene gasket.

In a further embodiment of the present invention, the cover body 3 includes a valve cover 19 and a gland 20 connected to each other, the valve cover 19 is mounted on the valve body 1, the gland 20 is mounted on the valve cover 19, and the containing groove 16 is formed between the gland 20 and the valve cover 19.

Preferably, at least one sealing ring 21 is arranged between the peripheral side of the upper valve rod 5 and the inner periphery of the gland 20, between the peripheral side of the lower valve rod 4 and the inner periphery of the bonnet 19, and between the lower end of the gland 20 and the upper end of the bonnet 19, so that the sealing performance of the whole gate valve is improved.

In a further embodiment of the present invention, the invisible burglar-proof gate valve further comprises: an opening degree indication mechanism 22 including: the valve rod comprises a transmission ring 23, an indication ring 24 and at least one connecting block 25, wherein the transmission ring 23 is in threaded connection with the upper end of the upper valve rod 5, the indication ring 24 is in movable fit with the cover body 3, at least one first guide groove 26 is formed in the periphery of the cover body 3 along the axial direction of the cover body 3, an open position indication mark and a closed position indication mark are sequentially arranged on the periphery of the cover body 3 from top to bottom, at least one indication assembly 27 is arranged on the inner periphery of the indication ring 24, the indication assembly 27 is in sliding fit with the first guide groove 26, and the connecting block 25 is respectively in clamping connection with the transmission ring 23 and the upper end of the indication ring.

Preferably, the opening degree indication mechanism 22 realizes the gate valve stroke opening degree indication.

In a further embodiment of the invention, the indication assembly 27 comprises: the inner periphery of the lower end of the indicating ring 24 is provided with a mounting groove 30, the second spring 28 is mounted in the mounting groove 30, two ends of the second spring 28 are respectively abutted between the mounting groove 30 and the ball body 29, and the ball body 29 is in sliding fit with the first guide groove 26.

Preferably, two indicating assemblies 27 are symmetrically arranged along the central axis of the indicating ring 24 at the inner periphery of the lower end of the indicating ring 24.

In a further embodiment of the present invention, the inner circumference of the indicating ring 24 is provided with at least one second guiding groove 31 along the axial direction of the indicating ring 24, and the second guiding groove 31 matches with the first guiding groove 26.

Preferably, the outer circumference of the cover 3 is symmetrically provided with two first guide grooves 26, the inner circumference of the indicating ring 24 is symmetrically provided with two second guide grooves 31, and the two first guide grooves 26 are respectively matched with the two second guide grooves 31.

In a further embodiment of the present invention, the outer periphery of the lid 3 is sequentially provided with a first ring groove 32 and a second ring groove 33 from top to bottom, the first ring groove 32 is an open position indicator, the second ring groove 33 is a closed position indicator, and the ball 29 is in sliding fit with the first ring groove 32 or the second ring groove 33.

Preferably, the ball 29 is matched with the first ring groove 32, the second ring groove 33, the first guide groove 26 and the second guide groove 31 respectively.

In a further embodiment of the present invention, a first engaging groove 34 is disposed at the upper end of the driving ring 23 along the radial direction of the driving ring 23, a second engaging groove 35 is disposed at the upper end of the indicating ring 24 along the radial direction of the indicating ring 24, and the first engaging groove 34 and the second engaging groove 35 are respectively engaged with the connecting block 25 and are in sliding fit.

In a further embodiment of the present invention, the longitudinal section of the connecting block 25 is arranged in a shape like a Chinese character 'tu', and the sections of the first engaging groove 34 and the second engaging groove 35 are arranged in a shape like a Chinese character 'tu'.

In a further embodiment of the invention, the upper end of the connecting piece 25 projects beyond the upper end faces of the drive ring 23 and the indicator ring 24.

Preferably, the first locking groove 34 is a through groove penetrating in the radial direction of the driving ring 23, and the second locking groove 35 is a through groove penetrating in the radial direction of the indicating ring 36.

Preferably, the section of the through groove is in a shape like a Chinese character 'tu', the connecting block 25 comprises a clamping portion 36 and a protruding rod portion 37 which are connected with each other, the clamping portion 36 is clamped with the bottom of the through groove, and the protruding rod portion 37 protrudes out of the top of the through groove.

Preferably, the distance between the outer circumference of the driving ring 23 and the inner circumference of the driving ring 23 is greater than or equal to the thickness of the connecting block 25.

Preferably, the connecting block 25 has a protruding portion at the top thereof, which facilitates the operation when it is necessary to move the connecting block 25.

Preferably, two first engaging grooves 34 are symmetrically disposed on the transmission ring 23 along the central axis thereof, two second engaging grooves 35 are symmetrically disposed on the indication ring 24 along the central axis thereof, the two first engaging grooves 34 are respectively opposite to the two second engaging grooves 35, the opposite first engaging groove 34 and the opposite second engaging groove 35 are engaged with each other through a connecting block 25, the connecting block 25 is slidably connected to the first engaging groove 34 and the second engaging groove 35, the opposite first engaging groove 34 and the opposite second engaging groove 35 are engaged with each other through another connecting block 25, and the other connecting block 25 is slidably connected to the other first engaging groove 34 and the other second engaging groove 35.

In a further embodiment of the present invention, the outer periphery of the lower end of the driving ring 23 is provided with a third annular groove 38, the inner periphery of the indicating ring 24 is provided with a third convex ring 39, and the third convex ring 39 is in limit fit with the third annular groove 38 along the axis of the driving ring 23.

Preferably, after the first guide groove 26 is matched with the second guide groove 31, because the indicating ring 24 is limited by the two guide grooves and can only move up and down, the transmission ring 23 is connected with the indicating ring 24, the upper valve rod 5 rotates to drive the indicating ring 24 and the transmission ring 23 to move up and down, and the upper valve rod 5 and the lower valve rod 4 drive the flashboard 2 to lift and simultaneously drive the indicating ring 24 to lift, so that the opening degree indication is realized.

Preferably, the periphery of the lower end of the indicating ring 24 is provided with a mounting block 40, the lower end of the indicating ring 24 and the mounting block 40 are provided with mounting grooves 30, and the indicating assembly 27 is mounted in the mounting grooves 30.

Preferably, the indicator ring 24 is symmetrically provided with two mounting blocks 40 along its central axis.

Preferably, the ball 29 is inserted into the first ring groove 32 to open the gate valve, and the ball 29 is inserted into the second ring groove 33 to close the gate valve.

Preferably, when the gate valve is to be switched to the locked state, the connecting block 25 is moved toward the inner peripheral side of the transmission ring 23 until the connecting block 25 is disengaged from the indicating ring 24, at which time the transmission ring 23 and the indicating ring 24 are disengaged from each other without interference.

Preferably, when the transmission ring 23 and the indication ring 24 are separated, the ball 29 is embedded in the first annular groove 32 or the second annular groove 33, so that the indication ring 24 can be prevented from falling off; the upper valve rod 5 is pressed downwards and rotated for a certain angle, the lug 11 of the locking block 9 is separated from the limiting locking between the two baffle tables 8, the upper valve rod 5 and the lower valve rod 4 are separated from each other without limitation, and the invisible anti-theft is realized.

Preferably, the gate plate 2 is screwed with the lower end of the lower valve rod 4, and the upper end of the upper valve rod 5 is fixedly connected with a hand wheel 42 through a screw 41.

Preferably, the bonnet 19 is fixedly connected to the valve body 1 by means of screws.

The invention adopts the form of a split valve rod, when the gate valve needs to be opened and closed, the upper valve rod 5 is pressed downwards, the first spring 6 is compressed, the two lugs 11 of the locking block 9 respectively extend into the two channels 13, then the upper valve rod 5 is rotated by a certain angle, the lugs 11 extend into the blocking grooves 12 until the side walls of the lugs 11 abut against the side walls of the blocking grooves 12 where the blocking platforms 8 are located, circumferential limiting is realized, the upper valve rod 5 is released, the upper surfaces of the lugs 11 of the locking block 9 and the upper surfaces of the blocking platforms 12 where the blocking platforms 8 are located are limited and locked, the locking block of the upper valve rod 5 and the two blocking platforms 8 of the lower valve rod 4 are axially limited and locked, the upper valve rod 5 is continuously rotated to drive the lower valve rod 4 to open and close the gate plate 2 of the gate valve, and; when the gate valve does not need to be operated, the upper valve rod 5 rotates for a certain angle, the lugs 11 of the locking block 9 are separated from the blocking grooves 12 of the blocking table 8, after the upper valve rod 5 is released, the two lugs 11 of the locking block 9 are separated from the two channels 13 respectively, so that the transmission of the upper valve rod 5 is disabled, the hand wheel 42 idles, the connecting channel cannot be found at the first time, and the anti-theft effect of the gate valve is realized.

The integral structure of the invention only improves the inside of the gate valve, has the same appearance as the common gate valve, and has the invisible anti-theft function.

The anti-theft valve is simple in structure and convenient to operate, adopts a split valve rod mode to realize anti-theft, and has good anti-theft performance.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. A hidden anti-theft gate valve is characterized by comprising:

the valve body is internally provided with a flow passage;

the cover body is arranged on the valve body;

2. The invisible burglar-proof gate valve as claimed in claim 1, wherein said lock block comprises: the upper end of the connecting column is fixedly connected with the middle part of the lower end of the upper valve rod, and the two lugs are respectively and fixedly connected with the periphery of the lower end of the connecting column;

3. The invisible anti-theft gate valve according to claim 1, wherein a first protruding ring is provided on the outer periphery of the lower end of the upper valve stem, a second protruding ring is provided on the outer periphery of the upper end of the lower valve stem, an accommodating groove is formed in the cover body, the first protruding ring is in limit fit with the upper end of the accommodating groove, the second protruding ring is in limit fit with the lower end of the accommodating groove, the first spring is located on the outer side of the blocking platform, and two ends of the first spring abut against between the first protruding ring and the second protruding ring.

4. The invisible anti-theft gate valve according to claim 3, wherein the cover body comprises a valve cover and a gland which are connected with each other, the valve cover is mounted on the valve body, the gland is mounted on the valve cover, and the accommodating groove is formed between the gland and the valve cover.

5. The concealed antitheft gate valve according to claim 1, further comprising: an opening degree indicating mechanism, the opening degree indicating mechanism comprising:

6. The invisible burglar gate valve of claim 5, wherein said indicating means comprises: the inner periphery of the lower end of the indicating ring is provided with a mounting groove, the second spring is mounted in the mounting groove, two ends of the second spring are respectively abutted between the mounting groove and the ball body, and the ball body is in sliding fit with the first guide groove.

7. The invisible burglar-proof gate valve as claimed in claim 6, wherein at least a second guide groove is formed on the inner periphery of said indicating ring along the axial direction of said indicating ring, and said second guide groove is matched with said first guide groove.

8. The invisible anti-theft gate valve according to claim 7, wherein a first ring groove and a second ring groove are sequentially formed in the periphery of the cover body from top to bottom, the first ring groove is the open position indicator, the second ring groove is the closed position indicator, and the ball body is in sliding fit with the first ring groove or the second ring groove.

9. The invisible anti-theft gate valve according to claim 5, characterized in that the upper end of the transmission ring is provided with a first clamping groove along the radial direction of the transmission ring, the upper end of the indication ring is provided with a second clamping groove along the radial direction of the indication ring, the first clamping groove and the second clamping groove are respectively connected with the connecting block in a clamping manner and are in sliding fit, the longitudinal section of the connecting block is arranged in a shape like a Chinese character 'tu', the sections of the first clamping groove and the second clamping groove are both arranged in a shape like a Chinese character 'tu', and the upper end of the connecting block protrudes out of the upper end surfaces of the transmission ring and the indication ring.

10. The invisible anti-theft gate valve according to claim 5, wherein a third ring groove is formed in the outer periphery of the lower end of the transmission ring, a third convex ring is formed in the inner periphery of the indicating ring, and the third convex ring is in limit fit with the third ring groove along the axis of the transmission ring.