CN114412999A

CN114412999A - Double-valve-core needle valve convenient to install

Info

Publication number: CN114412999A
Application number: CN202111594283.3A
Authority: CN
Inventors: 肖峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-29

Abstract

The invention relates to the technical field of precision valves and discloses a conveniently-installed needle valve with double valve cores, wherein joints are symmetrically and fixedly installed on two sides of a valve body, a valve core is movably sleeved in a sleeve hole, a first rotating ring meshed with a thread groove in a threaded manner is fixedly installed on one side of a first annular plug, a second rotating ring meshed with the thread groove in a threaded manner is fixedly installed on one side of a second annular plug, annular hydraulic grooves are formed in outer rings of two ends of the valve body, rotating sleeves are movably sleeved on the outer rings of the hydraulic grooves, sliding grooves communicated with the movable grooves are symmetrically formed in the front and the back of the interior of the valve body, a transmission shaft is movably installed in the middle of the movable grooves, sliding blocks meshed with the outer rings in the middle of the transmission shaft are movably sleeved at two ends of the sliding blocks, pull strips sleeved outside rotating wheels and on the tops of the valve cores are fixedly connected between outer ends of the sliding blocks, through the design of the double valve cores and the structural design of the rotating sleeves, the needle valve is convenient to install and use, also saves space and prolongs service life.

Description

Double-valve-core needle valve convenient to install

Technical Field

The invention relates to the technical field of precision valves, in particular to a double-valve-core needle valve convenient to install.

Background

The needle valve is a valve which can be accurately adjusted, has wide application, because the valve core of the needle valve is a sharp cone which is inserted into a valve seat like a needle, so the needle valve is named, has the function of opening or cutting off a pipeline passage and basically has the same function as a stop valve and a ball valve, but has the application range belonging to the high-precision range, so the requirement on the needle valve is higher, but the needle valve has certain problems:

when the needle valve is installed, the needle valve must be strictly installed according to the direction marked above, namely, the use of the needle valve is limited, the direction needs to be carefully noticed when the needle valve is installed, and because the valve core in the valve body has a small structure, the situation that the valve core is not tightly plugged when the valve core is used for plugging the communicating hole in the valve cavity exists, and because the adopted valve core is fine and is screwed inwards at the same time, the situation that a sealing head at the end part of the valve core is greatly deformed is greatly unfavorable for the long-term use and the whole sealing performance of the valve core; adopt simultaneously when using the valve body go to the turning handle with the hand and drive the case and move inside and reach the effect of closed valve, but if direct handle connects the case and will lead to its inner wall department that rotates friction valve chamber and then cause wearing and tearing and deformation when closing the valve, if adopt swing joint's mode can lead to the structure overlength of valve rod again, make the holistic structure of valve body bigger than normal, make installation scope receive the restriction in some specific environment, also be unfavorable for the installation and use, and adopt handle control still need design in advance when the installation to guarantee that the handle is in a convenient pivoted position after finishing, the installation degree of difficulty has been increased like this again, be unfavorable for the use in reality equally.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the double-valve-core needle valve which is convenient to install, has the advantages of convenience in installation, long service life and high precision, and solves the problems in the background technology.

The invention provides the following technical scheme: a conveniently installed double-valve-core needle valve comprises a valve body, wherein joints are symmetrically and fixedly installed on two sides of the valve body, valve cavities are symmetrically formed in the valve body up and down, communicating holes are formed between the valve cavities, trepanning communicated with the valve cavities are symmetrically formed in the valve body up and down, a valve core is movably sleeved in the trepanning, a compression ring is fixedly sleeved on an outer ring of the valve core, a sealing head is fixedly connected to one end, located in the valve cavities, of the valve core, a first annular groove is formed in one end, close to the outer ring, of the valve body, a second annular groove is formed in the other end, close to the outer ring, of the valve body, a first annular plug is movably sleeved in the first annular groove, a second annular plug is movably sleeved in the second annular groove, annular thread grooves are formed in outer side ends of the first annular groove and the second annular groove, a first rotating ring meshed with threads of the thread grooves is fixedly installed on one side of the first annular plug, and a second rotating ring which is in threaded engagement with the thread groove is fixedly arranged on one side of the second annular plug.

Preferably, the outer rings at the two ends of the valve body are provided with annular hydraulic grooves, the outer rings of the hydraulic grooves are movably sleeved with rotating sleeves, the top and the bottom of the valve body are symmetrically provided with movable grooves, the front and the back inside the valve body are symmetrically provided with sliding grooves communicated with the movable grooves, the middle part of the movable groove is movably provided with a transmission shaft, two ends of the sliding groove are movably sleeved with sliding blocks which are engaged and driven with the outer ring at the middle part of the transmission shaft, the valve body is movably provided with a rotating wheel at the joint of the movable groove and the sliding groove, a brace sleeved outside the rotating wheel and on the top of the valve core is fixedly connected between the outer end parts of the sliding blocks in the same direction, the two sides of the inner ring of the rotating sleeve are symmetrically and fixedly provided with gear rings, the two sides of the interior of the valve body are symmetrically and movably provided with transmission gears in meshing transmission with the gear rings, and the outer rings at the two ends of the transmission shaft are fixedly provided with gear sleeves in meshing transmission with the transmission gears.

Preferably, the trepanning, the first ring groove and the second ring groove are communicated with each other pairwise, hydraulic pressure is filled in the trepanning, and the distance between the inner ring wall and the outer ring wall of the first ring groove is larger than the distance between the inner ring wall and the outer ring wall of the second ring groove.

Preferably, the rotating sleeve is sleeved inside the top of the hydraulic groove and provided with a pressure relief hole, the top of the rotating sleeve is movably provided with a pressure relief valve at the position of the pressure relief hole, the middle position of the front side of the hydraulic groove is fixedly provided with a one-way valve, and the front side of the hydraulic groove is fixedly connected with a reset spring between the one-way valve and the pressure relief hole.

Preferably, magnets are symmetrically and fixedly mounted in the sealing head, magnetic poles of opposite faces of the magnets are the same, the brace is not stretched due to tensile force, the sliding block contracts to the maximum position towards the middle of the sliding groove when the middle of the brace is in a flat state, the sliding block is L-shaped and is provided with a tooth key on the inner side edge, the outer end of the sliding block is the same as the opening of the sliding groove, and the mounting modes of the two sliding blocks in the sliding groove are the same.

The invention has the following beneficial effects:

by arranging the double-valve-core structure in the valve body and arranging the rotary swivel or the rotary sleeve structure outside the valve body to replace a handle structure, compared with the prior art, the double-valve-core structure is adopted, so that symmetrical structures can be arranged on two sides of the valve body, the valve body can be directly installed without distinguishing joints, the valve is more convenient and simple, the double-valve-core sealing communication hole is adopted in the valve cavity, the sealing performance is better, meanwhile, the swivel structure is adopted to directly rotate, the closing of the inner valve core can be controlled, the precise adjustment can be carried out, the valve core can not be rotated to rub the inner wall of the valve cavity, the sealing precision can also be improved, the rotary sleeve structure can control the closing of the inner valve core by utilizing the gear transmission effect, the valve core can not be driven to rotate and twist by rotating the closing of the adjusting valve core, and the space brought by the handle and the valve rod can be saved, so that the installation is more facilitated, and its installation direction and position are unrestricted, and it is convenient to adjust, more does benefit to the use of permanent accurate.

Drawings

FIG. 1 is a schematic structural diagram of a valve opening device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a valve closing operation according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 4;

fig. 7 is a cross-sectional view taken along line D-D in fig. 4.

In the figure: 1. a valve body; 101. a valve cavity; 102. a communicating hole; 103. trepanning; 104. a first ring groove; 105. a second ring groove; 106. a hydraulic tank; 107. a movable groove; 108. a chute; 2. a joint; 3. a valve core; 4. pressing a ring; 5. a sealing head; 6. a first annular plug; 7. a second annular plug; 8. a first swivel; 9. a second swivel; 10. a thread groove; 11. rotating the sleeve; 1101. a toothed ring; 1102. a pressure relief vent; 12. a drive shaft; 1201. a gear sleeve; 13. a slider; 14. bracing; 15. a rotating wheel; 16. a transmission gear; 17. a pressure relief valve; 18. a one-way valve; 19. a return spring.

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.

Example one

Referring to fig. 1-3, a conveniently installed double-spool needle valve comprises a valve body 1, wherein two sides of the valve body 1 are symmetrically and fixedly provided with connectors 2, a valve cavity 101 is symmetrically arranged in the valve body 1 from top to bottom, communication holes 102 are arranged between the valve cavities 101, sleeve holes 103 communicated with the valve cavity 101 are symmetrically arranged in the valve body 1 from top to bottom, a spool 3 is movably sleeved in the sleeve holes 103, an outer ring of the spool 3 is fixedly sleeved with a press ring 4, one end of the spool 3, which is positioned in the valve cavity 101, is fixedly connected with a sealing head 5, the sealing head 5 is conical and is just matched with two ends of the communication holes 102, the sealing head 5 is just abutted to the communication holes 102 when the spool 3 is closed, and simultaneously, the two ends of the communication holes 102 are synchronously sealed, so that the whole sealing performance can be improved, the continuous use can be ensured, and the time for replacing the valve body 1 can be saved when a single spool 3 has a problem, the efficiency of the valve is improved, a first ring groove 104 is arranged in a position close to the outer ring in one end of the valve body 1, a second ring groove 105 is arranged in a position close to the outer ring in the other end of the valve body 1, the sleeve hole 103, the first ring groove 104 and the second ring groove 105 are communicated with each other in pairs, hydraulic pressure is filled in the sleeve hole, the distance between the inner ring wall and the outer ring wall of the first ring groove 104 is larger than the distance between the inner ring wall and the outer ring wall of the second ring groove 105, the hydraulic pressure in the ring groove can be transmitted to the valve core 3 by rotating the first rotating ring 8 and the second rotating ring 9 to move towards the inside of the valve cavity 101 so as to seal the communicating hole 102 to achieve the effect of closing the valve, meanwhile, according to the difference of the sizes of the two ring grooves, the larger hydraulic pressure generated by rotating the first rotating ring 8 is used for coarse adjustment at the moment to press the valve core 3 to a position approximate to the communicating hole 102, and then the smaller hydraulic pressure generated by rotating the second rotating ring 9 to perform fine adjustment on the valve core 3, therefore, the adjustment precision is high, the phenomenon that the subsequent tightness is influenced by the deformation of the sealing head 5 due to overlarge one-time rotation can be avoided, the first annular groove 104 is movably sleeved with the first annular plug 6, the second annular plug 7 is movably sleeved with the second annular plug 105, the outer side ends of the first annular groove 104 and the second annular groove 105 are respectively provided with the annular threaded groove 10, one side of the first annular plug 6 is fixedly provided with the first rotating ring 8 in threaded engagement with the threaded groove 10, one side of the second annular plug 7 is fixedly provided with the second rotating ring 9 in threaded engagement with the threaded groove 10, the side surface of the valve body 1 is provided with scales at the outer rings of the first rotating ring 8 and the second rotating ring 9, the spiral angle can be directly observed when the rotating ring is rotated, so that the approximate position of the valve core 3 in the valve cavity 101 can be judged, on the one hand, the limit effect can be automatically realized after the spiral through the threaded sleeve connection mode, and the limit structure can be saved, on the other hand, the hydraulic pressure can be pushed to the top of the sleeve hole 103 to press the valve core 3 in a labor-saving manner by adopting spiral rotation.

The operating principle is that the valve body 1 is firstly installed in a required pipeline, and the valve is opened: the valve core 3 contracts towards the inside of the sleeve hole 103 until the sealing head 5 is pressed against the top wall of the valve cavity 101, fluid flows in through the inner hole of the connector 2 at one end, passes through the valve cavity 101 and the communication hole 102 and flows out from the inner hole of the connector 2 at the other end, when the valve needs to be closed, the first rotary ring 8 is manually rotated to drive the first annular plug 6 to slide towards the inside of the first annular groove 104, at the moment, the first annular plug 6 can extrude the hydraulic pressure towards the inside and enter the trepanning 103 so as to jack the valve core 3 towards the inside of the valve cavity 101, the valve core 3 moves towards the inside of the valve cavity 101 until the sealing head 5 abuts against the communicating hole 102, at the moment, the first rotary ring 8 stops rotating, then the second rotating ring 9 is rotated, the second rotating ring 9 drives the second annular plug 7 to extrude hydraulic pressure towards the inside of the second annular groove 105 and act on the valve core 3 through the trepan 103, the hydraulic pressure variation at the moment is small, can carry out the regulation removal of small displacement volume to case 3, guarantee on the one hand the precision on the other hand and avoid because the too big extrusion deformation that causes of displacement is too big.

Example two

Referring to fig. 4-7, the outer ring of the two ends of the valve body 1 is provided with an annular hydraulic groove 106, the outer ring of the hydraulic groove 106 is movably sleeved with a rotating sleeve 11, the top and the bottom of the valve body 1 are symmetrically provided with movable grooves 107, the front and the back of the interior of the valve body 1 are symmetrically provided with sliding grooves 108 communicated with the movable grooves 107, the middle part of the movable groove 107 is movably installed with a transmission shaft 12, the two ends of the sliding groove 108 are movably sleeved with a sliding block 13 engaged with the outer ring of the middle part of the transmission shaft 12, the valve body 1 is movably installed with a rotating wheel 15 at the joint of the movable groove 107 and the sliding groove 108, a brace 14 sleeved outside the rotating wheel 15 and at the top of the valve core 3 is fixedly connected between the outer ends of the sliding blocks 13 in the same direction, magnets are symmetrically and fixedly installed inside the sealing head 5, the opposite magnetic poles are the same, the brace 14 is not elongated by pulling force, the brace 14 is pulled by the sliding block 13 to press the valve core 3 downwards so as to move towards the interior of the valve cavity 101 and seal the communicating hole 102, the length deformation of the brace 14 is not generated in the process of being pulled by force, so that the precision can be ensured, meanwhile, the magnet structure is utilized to ensure that mutual repulsion between the valve cores 3 can be abutted under the condition that the limit of the brace 14 is lost, the fluid is ensured to pass through the communication hole 102, the slide block 13 is contracted to the maximum position towards the middle part of the sliding groove 108 when the middle part of the brace 14 is in a leveling state, the slide block 13 is L-shaped, the tooth keys are arranged at the inner side edge of the slide block 13, the outer end part of the slide block 13 is the same as the opening shape of the sliding groove 108, the installation modes of the slide blocks 13 in the two sliding grooves 108 are the same, two ends of the brace 14 are driven downwards by the slide block 13 so that the middle part of the brace is abutted against the valve cores 3 downwards and is contracted towards the interior of the valve cavity 101, the transmission shaft 12 is driven by the transmission gear 16, and the transmission gear 16 is driven when the rotating sleeve 11, so that the process that the valve cores 3 are driven to move towards the interior of the valve cavity 101 by the rotating sleeve 11 is realized, meanwhile, due to the limitation of the rotating direction, the installation modes of the sliding blocks 13 in the two sliding grooves 108 are the same and are not symmetrically installed, so that the sliding blocks can be ensured to be subjected to the same pulling force at the two ends of the brace 14 while the transmission shaft 12 is rotated, meanwhile, the end parts of the sliding blocks 13 are the same as the sliding grooves 108 in size and shape, the smooth sliding of the sliding blocks 13 is ensured, and the end parts of the sliding blocks 13 can not be completely separated from the sliding grooves 108 when the sliding blocks slide outwards to the maximum position, the toothed rings 1101 are symmetrically and fixedly installed at the two sides of the inner ring of the rotating sleeve 11, the transmission gears 16 which are in meshing transmission with the toothed rings 1101 are symmetrically and movably installed at the two sides in the valve body 1, the toothed sleeves 1201 which are in meshing transmission with the transmission gears 16 are fixedly installed at the outer rings at the two ends of the transmission shaft 12, the rotating sleeve 11 is sleeved at the top of the hydraulic groove 106 and is provided with a pressure relief hole 1102, and the pressure relief valve 17 is movably installed at the top of the rotating sleeve 11, the middle position fixed mounting that hydraulic pressure groove 106 was positive has check valve 18, hydraulic pressure groove 106 is positive to be located fixedly connected with reset spring 19 between check valve 18 and the pressure release hole 1102, the biggest turned angle of commentaries on classics cover 11 is no longer than ninety degrees, just can utilize ring gear 1101 to drive the slider 13 of valve body 1 inside to shrink certain displacement volume to inside through rotating the commentaries on classics cover 11 of certain angle, and then press case 3 to valve chamber 101 inside through brace 14 and seal, here because it is located the outside to change cover 11, consequently only need it to rotate less angle and just can realize the great displacement volume of inside slider 13 slip, also convenient operation simultaneously.

The operating principle is that the valve body 1 is firstly installed in a required pipeline, and the valve is opened: the sealing head 5 at the end of the valve core 3 contracts into the sleeve hole 103 under the action of magnetic repulsion force to a position abutting against the top wall of the valve cavity 101, at the moment, the return spring 19 is at the maximum extension position, fluid flows in through the inner hole of the connector 2 at one end and flows out through the inner hole of the connector 2 at the other end through the valve cavity 101 and the communication hole 102, when the valve needs to be closed, the rotating sleeve 11 rotates along the hydraulic groove 106 by rotating the rotating sleeve 11, the top position of the rotating sleeve 11 extrudes the return spring 19 and presses hydraulic pressure to the other side through the one-way valve 18, the rotating sleeve 11 drives the gear ring 1101 to rotate together in the rotating process, the gear ring 1101 rotates to drive the transmission gear 16 to rotate, the transmission gear 16 drives the gear sleeve 1201 to rotate through meshing transmission, the rotating gear sleeve 1201 drives the transmission shaft 12 to rotate, further drives the sliding blocks 13 at two sides of the middle part to slide towards the middle part under the action of gear meshing transmission, and drives the brace 14 connected with the end part to move together when the sliding blocks 13 slide towards the middle part along the sliding groove 108, the two ends of the brace 14 at the end of the valve core 3 are subjected to the same tension change, a downward force is generated in the middle to enable the valve core 3 to move towards the inside of the valve cavity 101 along the sleeve hole 103 until the sealing head 5 abuts against the communicating hole 102 to realize sealing, then, only the pressure relief valve 17 needs to be opened when the valve needs to be opened, the inside of the hydraulic groove 106 is communicated, the rotating sleeve 11 is reset under the action of the reset spring 19, the pressure relief valve 17 is screwed down again after the reset is finished, the valve core 3 also shrinks towards the two ends to the inside of the sleeve hole 103 under the action of the magnetic repulsion force inside the sealing head 5, and then, the rotating sleeve 11 needs to be rotated again when the valve is closed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

1. The utility model provides a double-valve-core needle type valve easy to assemble, includes valve body (1), its characterized in that: the two sides of the valve body (1) are symmetrically and fixedly provided with connectors (2), the valve cavity (101) is symmetrically arranged in the valve body (1) from top to bottom, communicating holes (102) are formed between the valve cavities (101), the valve body (1) is symmetrically arranged in the valve body from top to bottom, trepanning holes (103) communicated with the valve cavity (101) are formed in the valve body (1) from top to bottom, a valve core (3) is movably sleeved in the trepanning holes (103), a pressing ring (4) is fixedly sleeved on the outer ring of the valve core (3), one end, located in the valve cavity (101), of the valve core (3) is fixedly connected with a sealing head (5), a first annular groove (104) is formed in one end of the valve body (1) close to the outer ring position, a second annular groove (105) is formed in the other end of the valve body (1) close to the outer ring position, a first annular plug (6) is sleeved in the first annular groove (104), a second annular plug (7) is movably sleeved in the second annular groove (105), annular thread groove (10) have all been seted up with second annular (105) outside end in first annular (104), one side fixed mounting of first annular stopper (6) has first change (8) with thread groove (10) thread engagement, one side fixed mounting of second annular stopper (7) has second change (9) with thread groove (10) thread engagement.

2. An easy to install, two-spool needle valve according to claim 1, wherein: the outer ring of the two ends of the valve body (1) is provided with an annular hydraulic groove (106), the outer ring of the hydraulic groove (106) is movably sleeved with a rotating sleeve (11), the top and the bottom of the valve body (1) are symmetrically provided with movable grooves (107), the front and the back of the interior of the valve body (1) are symmetrically provided with sliding chutes (108) communicated with the movable grooves (107), the middle part of the movable groove (107) is movably provided with a transmission shaft (12), the two ends of the sliding chutes (108) are movably sleeved with sliding blocks (13) which are in meshing transmission with the outer ring of the middle part of the transmission shaft (12), the valve body (1) is movably provided with a rotating wheel (15) at the joint of the movable grooves (107) and the sliding chutes (108), a brace (14) sleeved outside the rotating wheel (15) and at the top of the valve core (3) is fixedly connected between the outer end parts of the sliding blocks (13) in the same direction, and toothed rings (1101) are symmetrically and fixedly arranged at the two sides of the inner ring of the rotating sleeve (11), the two sides inside the valve body (1) are symmetrically and movably provided with transmission gears (16) in meshing transmission with a gear ring (1101), and outer rings at two ends of the transmission shaft (12) are fixedly provided with gear sleeves (1201) in meshing transmission with the transmission gears (16).

3. An easy to install, two-spool needle valve according to claim 1, wherein: the trepanning (103), the first ring groove (104) and the second ring groove (105) are mutually communicated pairwise, hydraulic pressure is filled in the trepanning, and the distance between the inner ring wall and the outer ring wall of the first ring groove (104) is larger than the distance between the inner ring wall and the outer ring wall of the second ring groove (105).

4. An easy to install, two-spool needle valve according to claim 2, wherein: it has seted up pressure release hole (1102) to change cover (11) to cup joint the inside in hydraulic pressure groove (106) top department, it has relief valve (17) to be located pressure release hole (1102) movable mounting at cover (11) top, the positive middle part position fixed mounting in hydraulic pressure groove (106) has check valve (18), hydraulic pressure groove (106) openly is located fixedly connected with reset spring (19) between check valve (18) and pressure release hole (1102).

5. An easy to install, two-spool needle valve according to claim 2, wherein: the magnet is symmetrically and fixedly mounted in the sealing head (5), the magnetic poles of opposite faces are the same, the brace (14) is not stretched due to tensile force, the sliding block (13) contracts to the maximum position towards the middle of the sliding groove (108) when the middle of the brace (14) is in a leveling state, the sliding block (13) is L-shaped and is provided with a toothed key on the inner side edge, the outer end of the sliding block (13) is the same as the opening of the sliding groove (108), and the mounting modes of the sliding block (13) in the sliding groove (108) are the same.