CN211259775U - Lifting device capable of limiting highest vacuum pressure - Google Patents
Lifting device capable of limiting highest vacuum pressure Download PDFInfo
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- CN211259775U CN211259775U CN201921529001.XU CN201921529001U CN211259775U CN 211259775 U CN211259775 U CN 211259775U CN 201921529001 U CN201921529001 U CN 201921529001U CN 211259775 U CN211259775 U CN 211259775U
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- valve disc
- vacuum
- lifting
- vacuum pressure
- vacuum cavity
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Abstract
The utility model relates to the technical field of low vacuum, in particular to a lifting device capable of limiting the highest vacuum pressure.A valve seat is overlapped on a bottom plate, a central hole is arranged on the bottom plate, a lifting valve disc for the external atmosphere of a vacuum cavity to enter the vacuum cavity is arranged in the central hole, the lifting valve disc moves up and down in the central hole, and when the vacuum pressure in the vacuum cavity is greater than the gravity designed by the lifting valve disc, the lifting valve disc controls the valve disc to open; when the internal vacuum pressure of vacuum cavity is less than the gravity of lift valve disc design, lift valve disc control valve disc is closed, utilize the relation of gravity and the vacuum pressure effect of calculation, the lift valve disc of certain weight has been designed, can borrow by lift valve disc gravity to adjust the device that automatic rising opened and close in order to reach the highest vacuum pressure in the restraint system need not rely on the manual work, vacuum in the experience adjustment vacuum cavity, degree of automation is high, avoid equipment because of the high damage in vacuum, can not exert an influence to production, improve equipment's life, and investment cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of the low vacuum technique and specifically relates to a but over-and-under type restriction maximum vacuum pressure device.
Background
In order to prevent the vacuum degree in the vacuum cavity from being too high in the operating environment using low vacuum, a lot of methods are currently used for opening a manually adjustable air-guiding port and adjusting the caliber size by experience to control the maximum vacuum pressure, which is not a scientific and reliable method. However, when the specification of the product to be produced is changed due to manual operation, the opening degree may need to be readjusted, and the equipment is often damaged due to manual negligence.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the lifting type highest vacuum pressure limiting device can limit the highest vacuum degree in the low vacuum field and achieve the purpose of limiting the vacuum by introducing external air by utilizing the comparison of gravity and vacuum force.
The utility model provides a technical scheme that its technical problem adopted is: a lifting type device capable of limiting the highest vacuum pressure comprises a bottom plate fixed inside a vacuum cavity, wherein a valve seat is stacked on the bottom plate, a central hole is formed in the bottom plate, a lifting valve disc for allowing the atmosphere outside the vacuum cavity to enter the vacuum cavity is arranged in the central hole, the lifting valve disc moves up and down in the central hole, and when the vacuum pressure inside the vacuum cavity is larger than the designed gravity of the lifting valve disc, the lifting valve disc controls the valve disc to open; when the vacuum pressure in the vacuum cavity is smaller than the designed gravity of the lifting valve disc, the lifting valve disc controls the valve disc to close.
Further, the lifting valve disc comprises an upper valve disc, a lower valve disc and a lifting stand column arranged between the upper valve disc and the lower valve disc, a through hole is formed in the center positions of the lower valve disc and the lifting stand column and communicated with the atmosphere outside the vacuum cavity, a plurality of vent holes for allowing atmosphere to escape into the vacuum cavity to restrain the vacuum degree from continuing to climb up are formed in the upper end portion of the lifting stand column along the outer circumferential surface, and the through holes are communicated with the vent holes.
Further, the valve seat is made of soft materials.
Furthermore, a gap is arranged between the lifting upright post and the inner wall of the central hole.
The utility model has the advantages that: the utility model discloses utilize the gravity of calculation and the relation of vacuum pressure effect, design out the lift valve disc of basis weight, can borrow by lift valve disc gravity to adjust the device that automatic rising was opened and close in order to reach the highest vacuum pressure in the restraint system, need not rely on manual work, experience to adjust the vacuum in the vacuum cavity, degree of automation is high, avoids equipment because of the high impairedness in vacuum, can not exert an influence to production, improve equipment's life reduces investment cost.
Drawings
Fig. 1 is a schematic structural view of the closed state of the present invention;
FIG. 2 is a schematic structural view of the lifting column of the present invention;
fig. 3 is a schematic structural diagram of the open state of the present invention.
In the figure: 1. the lifting valve comprises a bottom plate, 3 central holes, 4 lifting valve discs, 5 valve seats, 6 upper valve discs, 7 lower valve discs, 8 lifting columns, 9 through holes and 10 vent holes.
Detailed Description
The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The lifting type device capable of limiting the highest vacuum pressure comprises a bottom plate 1 fixed inside a vacuum cavity, a valve seat 5 is overlapped on the bottom plate 1, a central hole 3 is formed in the bottom plate 1, a lifting valve disc 4 for allowing the atmosphere outside the vacuum cavity to enter the vacuum cavity is arranged in the central hole 3, the lifting valve disc 4 moves up and down in the central hole 3, and when the vacuum pressure inside the vacuum cavity is larger than the designed gravity of the lifting valve disc 4, the lifting valve disc 4 controls the valve disc 2 to be opened; the lift valve disc 4 controls the valve disc 2 to close when the vacuum pressure inside the vacuum chamber 27 is less than the designed gravity of the lift valve disc 4.
The lifting valve disc 4 comprises an upper valve disc 6, a lower valve disc 7 and a lifting upright post 8 arranged between the upper valve disc 6 and the lower valve disc 7, a through hole 9 is formed in the center positions of the lower valve disc 7 and the lifting upright post 8, the through hole 9 is communicated with the atmosphere outside the vacuum cavity, a plurality of vent holes 10 for atmosphere to escape into the vacuum cavity to inhibit the vacuum degree from continuously climbing are formed in the upper end portion of the lifting upright post 8 along the outer circumferential surface, and the through hole 9 is communicated with the vent holes 10.
The valve seat 5 is made of soft material.
The lifting upright post 8 and the inner wall of the central hole 3 are arranged in a clearance way.
The working principle is as follows:
the lifting valve disc 4 with certain weight is designed through vacuum force calculation and is installed on a vacuum cavity, when the vacuum pressure in the vacuum cavity exceeds a set value, the upper valve disc 6 in the vacuum cavity is lifted upwards due to the fact that the vacuum suction force is larger than the gravity of the lifting valve disc 4, the lifting height of the lifting valve disc 4 is in direct proportion to the vacuum pressure, and automatic adjustment is carried out;
when the lifting valve disc 4 rises, the atmosphere outside the vacuum cavity is introduced into the vacuum cavity through the through holes 9 and the vent holes 10, and the vacuum pressure is reduced;
when the vacuum pressure in the vacuum cavity is gradually reduced, the lifting valve disc 4 is gradually lowered to the original position due to the gravity;
when the vacuum pressure is lower than the gravity pressure, the lifting valve disc 4 returns to close to continuously maintain the low vacuum state of the system.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (4)
1. A lifting type device capable of limiting the highest vacuum pressure is characterized in that: comprises a bottom plate (1) fixed in a vacuum cavity, a valve seat (5) is overlapped on the bottom plate (1), a central hole (3) is arranged on the bottom plate (1), a lifting valve disc (4) for the atmosphere outside the vacuum cavity to enter the vacuum cavity is arranged in the central hole (3), the lifting valve disc (4) moves up and down in the central hole (3),
when the vacuum pressure in the vacuum cavity is greater than the designed gravity of the lifting valve disc (4), the lifting valve disc (4) controls the valve disc (2) to open;
when the vacuum pressure in the vacuum cavity (27) is smaller than the designed gravity of the lifting valve disc (4), the lifting valve disc (4) controls the valve disc (2) to close.
2. The elevating maximum vacuum pressure limiting apparatus as set forth in claim 1, wherein: lift valve disc (4) including last valve disc (6), lower valve disc (7) and establish lift stand (8) between last valve disc (6) and lower valve disc (7), the central point department of putting of valve disc (7) and lift stand (8) down has seted up through-hole (9), through-hole (9) and the external atmosphere of vacuum cavity intercommunication, the upper end of lift stand (8) is seted up along outer circumferential surface and is supplied a plurality of air vents (10) that the atmospheric escape goes on to restrain vacuum in the vacuum cavity and climb up, through-hole (9) link up with air vent (10).
3. The elevating maximum vacuum pressure limiting apparatus as set forth in claim 1, wherein: the valve seat (5) is made of soft materials.
4. The elevating maximum vacuum pressure limiting apparatus as set forth in claim 2, wherein: the lifting upright post (8) and the inner wall of the central hole (3) are arranged in a clearance way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921529001.XU CN211259775U (en) | 2019-09-12 | 2019-09-12 | Lifting device capable of limiting highest vacuum pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921529001.XU CN211259775U (en) | 2019-09-12 | 2019-09-12 | Lifting device capable of limiting highest vacuum pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211259775U true CN211259775U (en) | 2020-08-14 |
Family
ID=71989576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921529001.XU Active CN211259775U (en) | 2019-09-12 | 2019-09-12 | Lifting device capable of limiting highest vacuum pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211259775U (en) |
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2019
- 2019-09-12 CN CN201921529001.XU patent/CN211259775U/en active Active
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