CN114183539A - Magnetic drive type vacuum drawing valve - Google Patents
Magnetic drive type vacuum drawing valve Download PDFInfo
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- CN114183539A CN114183539A CN202111436650.7A CN202111436650A CN114183539A CN 114183539 A CN114183539 A CN 114183539A CN 202111436650 A CN202111436650 A CN 202111436650A CN 114183539 A CN114183539 A CN 114183539A
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- sleeve
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- 230000000670 limiting effect Effects 0.000 claims abstract description 100
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 230000003068 static effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009351 contact transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
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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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
- F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention belongs to the field of vacuum valves, and discloses a magnetic drive type vacuum drawing valve which comprises a cylinder, a main magnetic wheel assembly, a secondary magnetic wheel assembly, a lead screw assembly, a quick connector, a tripping assembly, a drawing rod and a resetting piece. In an initial state, the tripping sleeve is positioned above the limiting mechanism, the limiting part supports the resetting piece, the resetting piece lifts the limiting mechanism upwards to release the clamping with the inner wall of the cylinder body and release the pressure on the tripping piece, the tripping piece leaves the quick-plugging connector, and the pulling rod extends into the quick-plugging connector to be locked with the quick-plugging connector to open the vacuum plug; and in a tripping state, the tripping sleeve drives the pulling rod and the vacuum plug to move downwards until the vacuum plug is inserted into the equipment vacuumizing opening again, the main magnetic wheel assembly continues to rotate, the pulling rod is static, the lead screw nut drives the tripping sleeve to continue to press the limiting mechanism downwards, the limiting mechanism is clamped with the inner wall of the barrel, the limiting mechanism presses the tripping piece downwards, the tripping piece is enabled to compress the quick connector, and the pulling rod and the quick connector can be separated. The present invention achieves zero leakage during opening and closing of the vacuum plug.
Description
Technical Field
The invention relates to the field of vacuum valves, in particular to a magnetic drive type vacuum drawing valve.
Background
When equipment is vacuumized, the equipment evacuation port needs to be opened, and after the equipment evacuation port is vacuumized, the equipment evacuation port needs to be closed for sealing.
In the common mechanical drawing valve in the market at present, the drawing rod and the valve seat adopt a radial sealing structure. The opening and closing of the evacuation opening of the device and the screwing and unscrewing of the vacuum plug of the evacuation opening are achieved by lifting and rotating the pull rod. With the drawing valve of this structure, the following adverse effects are produced due to the restriction of the seal structure:
first, opening and closing the evacuation ports of the apparatus requires pulling up and down the evacuation rods, and tightening and loosening the vacuum plugs requires rotating the evacuation rods. The above operation causes a relative movement of the evacuation tie-rod and the valve seat, so that a certain vacuum leakage occurs, the negative effects of which are even more pronounced, especially in the case of high vacuum levels.
Secondly, the vacuum plug is screwed up and loosened and needs to be rotated to evacuate the pull rod, the vacuum plug and the equipment evacuation port are in a radial sealing structure, if the friction force between the equipment evacuation port and the vacuum plug is small, the vacuum plug can rotate with the pull rod during the rotation evacuation, certain leakage is generated, in order to increase the friction force, a pump connecting port is often required to be opened to increase the friction force by depending on the atmospheric pressure, but at the moment, if the rotation with the vacuum plug is generated, the harmfulness is larger. The phenomenon of "follow-up" is more obvious because the friction force is relatively smaller when the size of the vacuum plug is smaller.
Thirdly, due to the structural limitations, it is generally difficult to release the vacuum plug in a vacuum state, and the operation in a non-vacuum state is prone to cause the leakage vacuum degree to be poor or even to be broken once a mistake occurs.
Disclosure of Invention
The invention aims to provide a magnetic drive type vacuum drawing valve, which realizes zero leakage in the process of opening and closing a vacuum plug.
The technical scheme provided by the invention is as follows:
a magnetically actuated vacuum pull valve comprising:
the top of the cylinder is closed, and the bottom of the cylinder is used for being in sealing connection with an equipment evacuation port;
the main magnetic wheel assembly is arranged outside the top of the cylinder;
the secondary magnetic wheel assembly is arranged in the cylinder and corresponds to the primary magnetic wheel assembly, and the primary magnetic wheel assembly is rotated to drive the secondary magnetic wheel assembly to rotate;
the screw rod assembly comprises a screw rod and a screw rod nut, the screw rod is fixedly connected with the slave magnetic wheel assembly, the screw rod nut is in threaded connection with the screw rod, and the screw rod assembly is driven by the master magnetic wheel assembly and the slave magnetic wheel assembly;
the quick-plug connector is arranged at the bottom of the cylinder body, and one end of the quick-plug connector extends out of the cylinder body and is used for being connected with a vacuum plug arranged at the evacuation port of the equipment;
the tripping assembly comprises a tripping sleeve, a limiting mechanism and a tripping piece, the tripping sleeve is fixedly connected with the lead screw nut and is in sliding connection with the inner wall of the barrel, the limiting mechanism is movably arranged on the inner wall of the barrel and can be clamped with the barrel, and the tripping piece is arranged at the bottom of the limiting mechanism;
the pulling rod is arranged in the tripping sleeve and can axially move relative to the tripping sleeve, and a limiting part is arranged at the bottom of the pulling rod;
the reset piece is movably sleeved outside the pull rod, and the top of the reset piece is positioned above the limiting part;
in an initial state, the tripping sleeve is positioned above the limiting mechanism, the limiting part supports the resetting piece, the resetting piece lifts the limiting mechanism upwards to release the clamping connection with the inner wall of the barrel and release the pressure on the tripping piece, the tripping piece leaves the quick connector, and the pulling rod extends into the quick connector to be locked with the quick connector so as to open the vacuum plug;
and in a tripping state, the tripping sleeve drives the pulling rod and the vacuum plug to move downwards to the vacuum plug insertion device vacuumizing port and continue to rotate the main magnetic wheel assembly, the pulling rod is static, the lead screw nut drives the tripping sleeve to continue to move downwards and press the limiting mechanism, the limiting mechanism moves downwards to be clamped with the inner wall of the barrel, the limiting mechanism presses the tripping piece downwards, so that the tripping piece compresses the quick-plugging connector, and the pulling rod and the quick-plugging connector can be separated.
In some embodiments, the spacing between the main magnetic wheel assembly and the barrel is adjustable;
the tripping assembly further comprises a first spring, the first spring is arranged in the tripping sleeve and sleeved on the pull rod, one end of the first spring is abutted to the top of the tripping sleeve, and the other end of the first spring is abutted to the pull rod.
In some embodiments, a retaining ring is arranged on the inner side wall of the tripping sleeve, a protruding portion is arranged on the outer side wall of the pulling rod, the protruding portion is arranged on the retaining ring, and the first spring is located between the top of the tripping sleeve and the protruding portion.
In some embodiments, the limiting mechanism includes a sliding sleeve and an elastic limiting part, the sliding sleeve is movably disposed on the inner side wall of the barrel, a clamping groove is formed in the inner side wall of the barrel, a through hole is formed in the sliding sleeve, the elastic limiting part is disposed in the through hole, and when the sliding sleeve moves to the position where the elastic limiting part corresponds to the clamping groove, the elastic limiting part extends into the clamping groove to be clamped with the clamping groove;
the pull rod drives the reset piece to move upwards, so that the reset piece is lifted upwards to pull the elastic limiting piece, the elastic limiting piece is clamped with the clamping groove, the sliding sleeve is clamped with the release piece, and the release piece is reset and separated from the quick connector.
In some embodiments, the through hole is a stepped hole, the stepped hole comprises a first stepped hole and a second stepped hole which are communicated, and the second stepped hole is arranged close to the inner wall of the cylinder body;
the elasticity locating part includes second spring and gag lever post, the gag lever post sets up first shoulder hole with the second shoulder hole is downthehole, the one end of gag lever post is stretched out first shoulder hole, the second spring housing is established just be located on the gag lever post the second shoulder hole is downthehole, the one end of second spring with the other end butt of gag lever post, the other end of second spring with the second shoulder hole butt.
In some embodiments, the stop rod comprises a head portion and a shaft portion, the head portion having a diameter greater than a diameter of the shaft portion, the head portion extending out of the first stepped bore;
the bottom of the reset piece is provided with a hook part used for hooking the head.
In some embodiments, the cylinder comprises an upper cylinder body and a lower valve seat, the lower valve seat is connected with the bottom of the upper cylinder body in a sealing mode, the lower valve seat is used for being connected with an equipment evacuation port in a sealing mode, the quick-connection plug is arranged in the lower valve seat, the fastening part is obliquely arranged on the side wall of the lower valve seat, one end, close to the quick-connection plug, of the fastening part extends out of the lower valve seat and presses the quick-connection plug when the fastening part is pressed, and the fastening part retracts into the lower valve seat when the fastening part is not pressed.
In some embodiments, the bottom of the sliding sleeve is an inclined surface, and the inclined surface is used for obliquely pressing down the release piece.
In some embodiments, the main magnetic force wheel assembly includes a mounting seat, a main bearing, a main rotation shaft, and a main magnetic force wheel, the mounting seat is in threaded connection with the outer side wall of the cylinder, the main bearing is disposed in the mounting seat, the main rotation shaft is disposed in the main bearing, one end of the main rotation shaft extends out of the mounting seat, and the main magnetic force wheel is fixedly connected with the main rotation shaft.
In some embodiments, the slave magnetic wheel assembly includes a slave bearing, a slave rotation shaft, and a slave magnetic wheel, the slave bearing is disposed at the top inside the cylinder, the slave rotation shaft is disposed on the slave bearing, and the slave magnetic wheel is fixedly connected with the slave rotation shaft and disposed corresponding to the master magnetic wheel.
The invention has the technical effects that:
the opening and closing of the vacuum plug are realized through the axial movement of the drawing piece, the drawing piece does not need to be rotated, and further the friction force between the vacuum plug and the equipment evacuation port does not need to be increased, so that the evacuation port does not need to be opened when the vacuum plug is opened, the vacuum environment in the evacuation valve is maintained, and the evacuation is prevented; in addition, when the vacuum plug is opened and closed, magnetic non-contact transmission is adopted, no leakage exists in the operation process, the internal vacuum degree is not influenced, and no leakage is generated in the whole vacuum operation.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a cross-sectional view of a magnetically actuated vacuum pull valve in an initial state according to an embodiment of the present disclosure;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a cross-sectional view of the pull rod of a magnetically actuated vacuum pull valve shown in an embodiment of the present application moved downward into engagement with a quick connector;
FIG. 4 is a cross-sectional view of a pull stem of a magnetically actuated vacuum pull valve opening a vacuum plug according to an embodiment of the present application;
FIG. 5 is a cross-sectional view of a pull rod of a magnetically actuated vacuum pull valve with a quick connector disengaged therefrom according to an embodiment of the present disclosure;
figure 6 is a cross-sectional view of the pull stem of a magnetically actuated vacuum pull valve shown removed from the vacuum plug according to an embodiment of the present application.
The reference numbers illustrate:
1. equipment evacuation ports; 2. a vacuum plug;
10. a barrel; 11. an upper cylinder body; 12. a lower valve seat; 13. a clamping groove; 20. a main magnetic wheel assembly; 21. a mounting seat; 22. a main bearing; 23. a main rotating shaft; 24. a main magnetic wheel; 30. a slave magnetic wheel assembly; 31. a slave bearing; 32. from the axis of rotation; 33. a slave magnetic wheel; 40. a screw assembly; 41. a screw rod; 42. a feed screw nut; 50. a trip assembly; 51. tripping the sheath; 511. a retainer ring; 52. a limiting mechanism; 521. a sliding sleeve; 522. an elastic limiting part; 5221. a second spring; 5222. a limiting rod; 53. releasing the fastener; 54. a first spring; 60. a pull rod; 61. a limiting part; 62. a projection; 70. a reset member; 71. a hook portion; 80. a quick connector.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In one embodiment of the present application, as shown in fig. 1 and 2, a magnetically driven vacuum pull valve includes a cylinder 10, a main magnetic wheel assembly 20, a slave magnetic wheel assembly 30, a lead screw assembly 40, a trip assembly 50, a pull rod 60, a reset member 70, and a quick connector 80.
The top of the cylinder 10 is closed, and the bottom is used for being connected with the equipment evacuation port 1 in a sealing mode. The cylinder 10 comprises an upper cylinder 11 and a lower valve seat 12, the lower valve seat 12 is connected with the bottom of the upper cylinder 11 in a sealing manner, the lower valve seat 12 is hollow, the lower valve seat 12 is used for being connected with the equipment evacuation port 1 in a sealing manner, the lower valve seat 12 can be connected with the side wall of the equipment evacuation port 1 in a threaded manner, and the bottom of the lower valve seat is sealed through a metal piece. The cylinder body 10 is arranged into two parts, so that the internal components of the cylinder body 10 can be conveniently installed, and after the internal components of the upper cylinder body 11 are installed, the upper cylinder body 11 and the lower valve seat 12 are welded together.
As shown in fig. 1, the main magnetic wheel assembly 20 is arranged outside the top of the cylinder 10; the main magnetic force wheel assembly 20 comprises a mounting seat 21, a main bearing 22, a main rotating shaft 23 and a main magnetic force wheel 24, wherein the mounting seat 21 is in threaded connection with the outer side wall of the upper barrel 11, the main bearing 22 is arranged in the mounting seat 21, the main rotating shaft 23 is arranged in the main bearing 22, one end of the main rotating shaft extends out of the mounting seat 21, and the main magnetic force wheel 24 is fixedly connected with the main rotating shaft 23.
The main rotating shaft 23 is provided in the main bearing 22, the main rotating shaft 23 is rotatable with respect to the mount 21, and the main magnetic wheel 24 is driven to rotate when the main rotating shaft 23 rotates. The main rotating shaft 23 extends out of the mounting seat 21, so that an operator can rotate the main rotating shaft 23 conveniently.
The slave magnetic wheel assembly 30 is disposed in the cylinder 10 and corresponding to the master magnetic wheel assembly 20, and rotates the master magnetic wheel assembly 20 to rotate the slave magnetic wheel assembly 30. As shown in fig. 1, the slave magnetic wheel assembly 30 includes a slave bearing 31, a slave rotational shaft 32, and a slave magnetic wheel 33, the slave bearing 31 is disposed at the top inside the cylinder 10, the slave rotational shaft 32 is disposed on the slave bearing 31, and the slave magnetic wheel 33 is fixedly connected to the slave rotational shaft 32 and disposed corresponding to the master magnetic wheel 24.
When the main rotating shaft 23 rotates, the main magnetic wheel 24 rotates along with the main rotating shaft 23, the main magnetic wheel 24 is arranged opposite to the auxiliary magnetic wheel 33, when the main magnetic wheel 24 rotates, the auxiliary magnetic wheel 33 is driven to rotate by the magnetic force, and the auxiliary rotating shaft 32 is driven to rotate by the auxiliary magnetic wheel 33.
As shown in fig. 1, the lead screw assembly 40 includes a lead screw 41 and a lead screw nut 42, the lead screw 41 is fixedly connected with the slave rotating shaft 32 of the slave magnetic wheel assembly 30, and the lead screw nut 42 is in threaded connection with the lead screw 41; when the rotating shaft 32 rotates, the screw rod 41 is driven to rotate, and when the screw rod 41 rotates, the screw rod nut 42 can move along the axial direction of the screw rod 41.
The quick-connect connector 80 is disposed at the bottom of the cylinder 10, i.e. disposed in the lower valve seat 12, and has one end extending out of the lower valve seat 12 for connecting with the vacuum plug 2 disposed at the evacuation port 1 of the device. The quick-connect coupling 80 is threadably connected to the vacuum plug 2 to secure the quick-connect coupling 80 to the vacuum plug 2. The quick connector 80 is used for locking the drawing rod 60, threads are arranged at the end part of the drawing rod 60, a slotted diaphragm spring is arranged inside the quick connector 80, the drawing rod 60 presses the slotted diaphragm spring downwards, and the elastic sheet of the diaphragm spring stretches into the thread groove to lock the drawing rod 60. In this embodiment, the quick connector 80 is a standard component, such as a pneumatic quick connector or a quick connector for locking a shaft, the quick connector 80 for locking a shaft changes a locking part inside from a diaphragm spring to a steel ball, and the pull rod 60 is locked by self-locking of the steel ball.
The tripping assembly 50 comprises a tripping sleeve 51, a limiting mechanism 52 and a tripping piece 53, wherein the tripping sleeve 51 is fixedly connected with the screw nut 42 and is in sliding connection with the inner wall of the upper barrel 11, a sliding groove is formed in the inner side wall of the upper barrel 11, the top of the tripping sleeve 51 is fixedly connected with the screw nut 42, the bottom of the tripping sleeve 51 is movably arranged in the sliding groove, the sliding groove can limit the tripping sleeve 51, and further limit the screw nut 42, so that the screw nut 42 cannot rotate along with the screw nut but can only do linear motion along the axial direction of the screw rod 41. When the screw nut 42 is lifted along the screw 41, the tripping sleeve 51 is driven to lift together.
The limiting mechanism 52 is movably arranged on the inner wall of the cylinder 10 and can be clamped with the cylinder 10, and the release piece 53 is arranged at the bottom of the limiting mechanism 52. The limiting mechanism 52 is located below the trip sleeve 51, when the trip sleeve 51 moves downwards, the limiting mechanism 52 can be pressed downwards, the limiting mechanism 52 moves downwards along the inner wall of the barrel 10 and presses the trip piece 53 downwards, the trip piece 53 also moves downwards and can press the quick-plug connector 80, when the limiting mechanism 52 moves downwards to a preset position, the limiting mechanism 52 is clamped with the inner wall of the barrel 10 to fix the limiting mechanism 52, at the moment, the trip piece 53 still presses the quick-plug connector 80, and the pull rod 60 can be separated from the quick-plug connector 80.
The drawing rod 60 is arranged in the trip sleeve 51 and can axially move relative to the trip sleeve 51, and the bottom of the drawing rod 60 is provided with a limiting part 61; the tripping sleeve 51 can drive the drawing rod 60 to move downwards together when moving downwards, the drawing rod 60 moves downwards to stretch into the quick connector 80, the quick connector 80 locks the drawing rod 60, the quick connector 80 is connected with the drawing rod 60, the drawing rod 60 can drive the quick connector 80 and the vacuum plug 2 to ascend together when ascending, so that the vacuum plug 2 at the evacuation port 1 of the equipment is opened, and the equipment can be vacuumized at the moment.
The reset piece 70 is movably sleeved outside the pull rod 60, and the top of the reset piece 70 is positioned above the limiting part 61; the reset piece 70 is directly sleeved on the outer side of the drawing rod 60, the reset piece 70 can axially move relative to the drawing rod 60, and the limiting part 61 can limit the reset piece 70. As shown in fig. 1, when the pull-out rod 60 rises to the top of the limiting part 61 and the reset piece 70, the pull-out rod 60 can drive the reset piece 70 to rise together, as shown in fig. 3, when the pull-out rod 60 falls to the bottom of the reset piece 70 and contacts with the lower valve seat 12, the reset piece 70 stops falling under the support of the lower valve seat 12, and the pull-out rod 60 can continue to fall into the quick connector 80. The reset element 70 is movably connected with the drawing rod 60, so that the drawing rod 60 can be ensured to have enough axial movement distance, and if the reset element 70 is fixedly connected with the drawing rod 60, the movable stroke of the drawing rod 60 is small, and the opening of the vacuum plug 2 cannot be realized.
As shown in fig. 1, in an initial state, the trip sleeve 51 is located above the limit mechanism 52, the limit part 61 supports the reset element 70, the reset element 70 lifts the limit mechanism 52 upwards to release the clamping with the inner wall of the cylinder 10 and release the pressure on the trip element 53, the trip element 53 leaves the quick-plug connector 80, as shown in fig. 3 and 4, the pull rod 60 extends into the quick-plug connector 80 to be locked with the quick-plug connector 80, and the vacuum plug 2 can be opened;
as shown in fig. 5 and fig. 6, in the tripping state, the tripping sleeve 51 drives the pulling rod 60 and the vacuum plug 2 to move downward until the vacuum plug 2 is inserted into the evacuation port 1 of the device, the main magnetic wheel assembly 20 continues to rotate, the pulling rod 60 is stationary, the lead screw nut 42 drives the tripping sleeve 51 to move downward, the limiting mechanism 52 is pressed downward, the limiting mechanism 52 moves downward to be clamped with the inner wall of the barrel 10, the limiting mechanism 52 presses the tripping piece 53 downward, and the tripping piece 53 presses the quick connector 80, so that the pulling rod 60 and the quick connector 80 can be separated.
The specific working process of the magnetic drive type vacuum drawing valve in the embodiment is as follows:
the schematic diagram of the initial state is shown in fig. 1, as shown in fig. 3, when the vacuum plug 2 needs to be opened, the main rotating shaft 23 is rotated to drive the secondary rotating shaft 32 and the lead screw 41 to rotate, the lead screw 41 rotates to drive the lead screw nut 42, the trip sleeve 51 and the pull rod 60 to move downward together, so that the pull rod 60 extends into the quick connector 80 to be locked with the quick connector 80, as shown in fig. 4, the main rotating shaft 23 is rotated reversely, so that the pull rod 60 drives the quick connector 80 and the vacuum plug 2 to move upward together, the vacuum plug 2 leaves the device evacuation port 1 to open the device evacuation port 1, and evacuation operation can be performed at this time.
After the evacuation is completed, as shown in fig. 5, the main rotating shaft 23 is rotated, the pulling rod 60 drives the quick connector 80 and the vacuum plug 2 to move downward together, so that the quick connector 80 returns to the initial position, and the vacuum plug 2 is inserted into the device evacuation port 1 to seal the device evacuation port 1, at this time, the main rotating shaft 23 continues to be rotated, the pulling rod 60 cannot continue to descend under the limiting action of the quick connector 80 and the vacuum plug 2, but the trip sleeve 51 and the pulling rod 60 can move relatively along the axial direction, the trip sleeve 51 continues to move downward under the action of the screw nut 42 and presses the limiting mechanism 52 downward, so that the limiting mechanism 52 also moves downward, the tripping piece 53 is pressed down when the limiting mechanism 52 moves downward, so that the tripping piece 53 presses the quick connector 80, and at the same time, the limiting mechanism 52 can be kept at the position after moving downward and being clamped with the inner wall of the barrel 10, so that the releasing member 53 continuously presses the quick connector 80, as shown in fig. 6, at this time, the main rotating shaft 23 is rotated reversely to lift the pulling rod 60, and the pulling rod 60 can be separated from the quick connector 80 under the action of external force because the releasing member 53 presses the quick connector 80, so that the quick connector 80 cannot lift along with the pulling rod 60, thereby fixing the vacuum plug 2 at the evacuation port 1 of the device. When the drawing rod 60 rises to the position where the limiting part 61 is in contact with the resetting piece 70, the drawing rod 60 drives the resetting piece 70 to move upwards, the resetting piece 70 can lift the limiting mechanism 52 upwards when moving upwards to the position where the limiting mechanism 52 is connected with the barrel 10 in a clamped mode so as to release the clamping between the limiting mechanism 52 and the inner wall of the barrel 10, at the moment, the limiting mechanism 52 can lift, reset and release the downward pressure on the release piece 53, the release piece 53 is separated from the quick-insertion connector 80, the limiting mechanism 52 and the release piece 53 both return to the initial state, and the next opening and closing of the vacuum plug 2 can be carried out.
In some embodiments, as shown in fig. 1 and 5, the spacing between the main magnetic wheel assembly 20 and the cylinder 10 is adjustable. The tripping assembly 50 further comprises a first spring 54, the first spring 54 is arranged in the tripping sleeve 51 and sleeved on the pull-out rod 60, one end of the first spring 54 is abutted against the top of the tripping sleeve 51, and the other end of the first spring is abutted against the pull-out rod 60. Specifically, the inner side wall of the trip sleeve 51 is provided with a retaining ring 511, the outer side wall of the pull-out rod 60 is provided with a protruding part 62, the protruding part 62 is arranged on the retaining ring 511, and the first spring 54 is positioned between the top of the trip sleeve 51 and the protruding part 62. The retainer ring 511 cooperates with the protrusion 62 to support the pull rod 60, and the trip sleeve 51 moves downward to drive the pull rod 60 to move downward. When the pull rod 60 moves downward to be inserted into the quick connector 80, the trip sleeve 51 can continuously move downward relative to the pull rod 60 if it overcomes the elastic force of the first spring 54.
The mounting seat 21 of the main magnetic wheel assembly 20 is in threaded connection with the outer side wall of the upper cylinder 11, and when the mounting seat 21 is rotated, the distance between the mounting seat 21 and the upper cylinder 11 can be adjusted, so that the distance between the main magnetic wheel 24 and the auxiliary magnetic wheel 33 can be adjusted, and further the magnetic transmission torque can be adjusted.
A first spring 54 is arranged between the top of the trip sleeve 51 and the draw rod 60 in the trip sleeve 51, when the draw rod 60 moves downwards to open the vacuum plug 2, the distance between the main magnetic wheel assembly 20 and the slave magnetic wheel assembly 30 is larger, the magnetic transmission torque is smaller, the magnetic wheel transmission torque cannot overcome the elastic force of the first spring 54, after the draw rod 60 moves downwards to be locked with the quick connector 80, the draw rod 60 stops moving downwards, when the main rotating shaft 23 continues to rotate, because the magnetic wheel transmission gap is large, the magnetic wheel transmission torque cannot overcome the elastic force of the first spring 54, so that the trip sleeve 51 cannot continue to move downwards relative to the draw rod 60, the trip sleeve 51 cannot press the limiting mechanism 52 downwards, the limiting mechanism 52 cannot press the trip fastener 53 downwards, the trip member 53 leaves the quick connector 80, after the draw rod 60 is locked by the quick connector 80, the main rotating shaft 23 rotates reversely, the quick connector 80 and the vacuum plug 2 can ascend along with the draw rod 60, to open the vacuum plug 2 of the evacuation port 1 of the apparatus.
After the evacuation is completed, the gap between the main magnetic wheel assembly 20 and the auxiliary magnetic wheel assembly 30 is reduced, so that the transmission gap of the magnetic wheel is reduced, and the transmission torque of the magnetic wheel is increased. By rotating the main rotating shaft 23, the pull-out rod 60, the trip sleeve 51 and the reset element 70 move downwards until the vacuum plug 2 closes on the device emptying opening 1. As the magnetic wheel driving torque is increased, as shown in fig. 5, when the main rotating shaft 23 continues to rotate, the pulling rod 60 cannot continue to move downward under the limiting effect of the quick connector 80, but the lead screw nut 42 continues to compress the first spring 54, the tripping sleeve 51 continues to move downward against the elastic force of the first spring 54, that is, the tripping sleeve 51 and the pulling rod 60 generate relative displacement at this time, the tripping sleeve 51 continues to move downward and presses the limiting mechanism 52 downward, the limiting mechanism 52 presses the tripping member 53 downward, so that the tripping member 53 presses the quick connector 80, at this time, the pulling rod 60 can release the locking state with the quick connector 80 under the external force, and when the main rotating shaft 23 rotates reversely, the pulling rod 60 can leave the quick connector 80 and return to the initial state.
In this embodiment, by providing the first spring 54 and setting the distance between the main magnetic wheel assembly 20 and the secondary magnetic wheel assembly 30 to be adjustable, when the main rotating shaft 23 is rotated in each state, it is not necessary to accurately determine the number of rotation turns of the main rotating shaft 23, and when the distance between the main magnetic wheel assembly 20 and the secondary magnetic wheel assembly 30 is large, even if the main rotating shaft 23 is excessively rotated, the lead screw nut 42 cannot overcome the elastic force of the first spring 54, so that the trip sleeve 51 cannot continuously move downward relative to the pull rod 60, and only when the magnetic transmission torque between the main magnetic wheel assembly 20 and the secondary magnetic wheel assembly 30 is adjusted to be appropriate, the lead screw nut 42 can overcome the elastic force of the first spring 54.
In some embodiments, as shown in fig. 4, the limiting mechanism 52 includes a sliding sleeve 521 and an elastic limiting member 522, the sliding sleeve 521 is movably disposed on an inner sidewall of the barrel 10, the inner sidewall of the barrel 10 is provided with a clamping groove 13, the sliding sleeve 521 is provided with a through hole disposed obliquely, the elastic limiting member 522 is disposed in the through hole, and when the sliding sleeve 521 moves to the elastic limiting member 522 corresponding to the clamping groove 13, the elastic limiting member 522 extends into the clamping groove 13 to be clamped with the clamping groove 13; the pulling rod 60 drives the resetting element 70 to move upwards, so that the resetting element 70 lifts the elastic limiting element 522 upwards, the elastic limiting element 522 is released from being clamped with the clamping groove 13, the sliding sleeve 521 releases the pressure on the disengaging element 53, and the disengaging element 53 resets and leaves the quick connector 80.
The through-hole is the shoulder hole, and the shoulder hole is including first shoulder hole and the second shoulder hole of intercommunication, and the second shoulder hole is close to the setting of barrel 10 inner wall. As shown in fig. 2, the elastic limiting member 522 includes a second spring 5221 and a limiting rod 5222, the limiting rod 5222 is disposed in the first stepped hole and the second stepped hole, one end of the limiting rod 5222 extends out of the first stepped hole, the second spring 5221 is sleeved on the limiting rod 5222 and is located in the second stepped hole, one end of the second spring 5221 is abutted to the other end of the limiting rod 5222, and the other end of the second spring 5221 is abutted to the second stepped hole.
When the elastic limiting member 522 abuts against the inner wall of the barrel 10, the second spring 5221 on the elastic limiting member 522 is in a compressed state under the action of the inner wall of the barrel 10, and when the sliding sleeve 521 moves downward until the elastic limiting member 522 corresponds to the snap-in groove 13, the limiting rod 5222 extends under the elastic action of the second spring 5221 and extends into the snap-in groove 13, so that the sliding sleeve 521 is fixed with the barrel 10, and when the trip sleeve 51 leaves the sliding sleeve 521, the limiting mechanism 52 can still maintain the downward pressure on the trip member 53.
The stop bar 5222 comprises a head portion and a rod portion, the diameter of the head portion is greater than the diameter of the rod portion, and the head portion extends out of the first stepped hole; the bottom of the restoring member 70 is provided with a hook portion 71 for hooking the head. After the sliding sleeve 521 is fixed with the barrel 10, when the pulling-out rod 60 carries the restoring element 70 to move upward together until the hook portion 71 of the restoring element 70 contacts with the head of the limiting rod 5222, the rod portion of the limiting rod 5222 can be pulled out from the clamping groove 13 when the restoring element 70 continues to move upward, so that the elastic limiting element 522 is released from clamping with the clamping groove 13.
In some embodiments, as shown in fig. 1 and 2, the quick-connect plug 80 is disposed in the lower valve seat 12, the release member 53 is disposed obliquely on the sidewall of the lower valve seat 12, one end of the release member 53 adjacent to the quick-connect plug 80 extends out of the lower valve seat 12 when pressed and presses the quick-connect plug 80, and the release member 53 retracts into the lower valve seat 12 when not pressed. The bottom of the sliding sleeve 521 is an inclined plane, and the inclined plane is used for obliquely pressing the release fastener 53 downwards. The bottom of the sliding sleeve 521 is provided with an inclined plane, so that the fastener 53 can be pressed down when the sliding sleeve 521 moves downwards.
The magnetic drive type vacuum drawing valve of the embodiment has the following advantages:
(1) the structure body does not need a sealing element to realize ultrahigh vacuum, realizes sealing through welding combination, and realizes the operation requirements of opening, closing and separating the vacuum plug by utilizing magnetic force non-contact transmission.
(2) Vacuum operation without leakage
Because the structure body forms the cavity through welded connection, the operation of vacuum stopper is non-contact, and the operation process is leak-free, does not influence inside vacuum degree vacuum operation and does not produce the leakage.
(3) General applicability
The adaptor of equipment evacuation mouth and vacuum valve threaded connection and through metal seal, it is sealed reliable, can satisfy different equipment evacuation mouths and use through changing different adaptors.
(4) Reliable structure
The cylinder structure is welded by stainless steel metal pieces, the transmission structure is a simple and reliable screw rod structure, the structure is reliable to use, non-metal sealing elements are not needed, and the service life is long.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A magnetically actuated vacuum pull valve, comprising:
the top of the cylinder is closed, and the bottom of the cylinder is used for being in sealing connection with an equipment evacuation port;
the main magnetic wheel assembly is arranged outside the top of the cylinder;
the secondary magnetic wheel assembly is arranged in the cylinder and corresponds to the primary magnetic wheel assembly, and the primary magnetic wheel assembly is rotated to drive the secondary magnetic wheel assembly to rotate;
the screw rod assembly comprises a screw rod and a screw rod nut, the screw rod is fixedly connected with the slave magnetic wheel assembly, the screw rod nut is in threaded connection with the screw rod, and the screw rod assembly is driven by the master magnetic wheel assembly and the slave magnetic wheel assembly;
the quick-plug connector is arranged at the bottom of the cylinder body, and one end of the quick-plug connector extends out of the cylinder body and is used for being connected with a vacuum plug arranged at the evacuation port of the equipment;
the tripping assembly comprises a tripping sleeve, a limiting mechanism and a tripping piece, the tripping sleeve is fixedly connected with the lead screw nut and is in sliding connection with the inner wall of the barrel, the limiting mechanism is movably arranged on the inner wall of the barrel and can be clamped with the barrel, and the tripping piece is arranged at the bottom of the limiting mechanism;
the pulling rod is arranged in the tripping sleeve and can axially move relative to the tripping sleeve, and a limiting part is arranged at the bottom of the pulling rod;
the reset piece is movably sleeved outside the pull rod, and the top of the reset piece is positioned above the limiting part;
in an initial state, the tripping sleeve is positioned above the limiting mechanism, the limiting part supports the resetting piece, the resetting piece lifts the limiting mechanism upwards to release the clamping connection with the inner wall of the barrel and release the pressure on the tripping piece, the tripping piece leaves the quick connector, and the pulling rod extends into the quick connector to be locked with the quick connector so as to open the vacuum plug;
and in a tripping state, the tripping sleeve drives the pulling rod and the vacuum plug to move downwards to the vacuum plug insertion device vacuumizing port and continue to rotate the main magnetic wheel assembly, the pulling rod is static, the lead screw nut drives the tripping sleeve to continue to move downwards and press the limiting mechanism, the limiting mechanism moves downwards to be clamped with the inner wall of the barrel, the limiting mechanism presses the tripping piece downwards, so that the tripping piece compresses the quick-plugging connector, and the pulling rod and the quick-plugging connector can be separated.
2. A magnetically-actuated vacuum pull valve according to claim 1,
the distance between the main magnetic wheel component and the cylinder body is adjustable;
the tripping assembly further comprises a first spring, the first spring is arranged in the tripping sleeve and sleeved on the pull rod, one end of the first spring is abutted to the top of the tripping sleeve, and the other end of the first spring is abutted to the pull rod.
3. A magnetically-actuated vacuum pull valve according to claim 2,
the inner side wall of the tripping sleeve is provided with a retaining ring, the outer side wall of the pull rod is provided with a protruding part, the protruding part is arranged on the retaining ring, and the first spring is located between the top of the tripping sleeve and the protruding part.
4. A magnetically-actuated vacuum pull valve according to claim 1,
the limiting mechanism comprises a sliding sleeve and an elastic limiting part, the sliding sleeve is movably arranged on the inner side wall of the barrel, a clamping groove is formed in the inner side wall of the barrel, a through hole which is obliquely arranged is formed in the sliding sleeve, the elastic limiting part is arranged in the through hole, and when the sliding sleeve moves to the position where the elastic limiting part corresponds to the clamping groove, the elastic limiting part extends into the clamping groove and is clamped with the clamping groove;
the pull rod drives the reset piece to move upwards, so that the reset piece is lifted upwards to pull the elastic limiting piece, the elastic limiting piece is clamped with the clamping groove, the sliding sleeve is clamped with the release piece, and the release piece is reset and separated from the quick connector.
5. A magnetically-actuated vacuum pull valve according to claim 4,
the through hole is a stepped hole which comprises a first stepped hole and a second stepped hole which are communicated, and the second stepped hole is arranged close to the inner wall of the cylinder body;
the elasticity locating part includes second spring and gag lever post, the gag lever post sets up first shoulder hole with the second shoulder hole is downthehole, the one end of gag lever post is stretched out first shoulder hole, the second spring housing is established just be located on the gag lever post the second shoulder hole is downthehole, the one end of second spring with the other end butt of gag lever post, the other end of second spring with the second shoulder hole butt.
6. A magnetically actuated vacuum pull valve according to claim 5,
the limiting rod comprises a head part and a rod part, the diameter of the head part is larger than that of the rod part, and the head part extends out of the first stepped hole;
the bottom of the reset piece is provided with a hook part used for hooking the head.
7. A magnetically-actuated vacuum pull valve according to claim 4,
the cylinder comprises an upper cylinder body and a lower valve seat, the lower valve seat is connected with the bottom of the upper cylinder body in a sealing mode, the lower valve seat is used for being connected with an equipment evacuation port in a sealing mode, the quick-connection plug is arranged in the lower valve seat, the fastening releasing piece is obliquely arranged on the side wall of the lower valve seat, one end, close to the quick-connection plug, of the fastening releasing piece extends out of the lower valve seat and presses the quick-connection plug when the fastening releasing piece is pressed, and the fastening releasing piece retracts into the lower valve seat when the fastening releasing piece is not pressed.
8. A magnetically-actuated vacuum-pumping valve as claimed in claim 7, wherein the bottom of the sleeve is a ramp adapted to bias the release member downward.
9. A magnetically-actuated vacuum pull valve according to claim 1,
the main magnetic force wheel assembly comprises a mounting seat, a main bearing, a main rotating shaft and a main magnetic force wheel, the mounting seat is in threaded connection with the outer side wall of the cylinder, the main bearing is arranged in the mounting seat, the main rotating shaft is arranged in the main bearing, one end of the main rotating shaft extends out of the mounting seat, and the main magnetic force wheel is fixedly connected with the main rotating shaft.
10. A magnetically actuated vacuum pull valve according to claim 9,
the secondary magnetic force wheel assembly comprises a secondary bearing, a secondary rotating shaft and a secondary magnetic force wheel, the secondary bearing is arranged at the top in the cylinder, the secondary rotating shaft is arranged on the secondary bearing, and the secondary magnetic force wheel is fixedly connected with the secondary rotating shaft and is arranged corresponding to the primary magnetic force wheel.
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| CN202111436650.7A CN114183539B (en) | 2021-11-29 | 2021-11-29 | Magnetic force driving type vacuum drawing valve |
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| CN202111436650.7A CN114183539B (en) | 2021-11-29 | 2021-11-29 | Magnetic force driving type vacuum drawing valve |
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| CN114183539B (en) | 2024-05-10 |
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