CN217836835U - Magnetic valve for vacuum tank and vacuum storage device - Google Patents

Abstract

The utility model provides a magnetic valve and a vacuum storage device for a vacuum tank, wherein the magnetic valve comprises a valve seat, a valve body and a valve core, the valve seat is provided with a first gas port and a second gas port which are communicated with the interior of the valve seat, and the valve body is provided with a vent hole which is communicated with the first gas port and the second gas port simultaneously; the magnetic valve also comprises a magnet and a ferromagnetic substance which can be attracted by the magnet, one of the magnet and the ferromagnetic substance is fixedly connected on the vacuum tank, and the other is fixedly connected with the valve core; when the vacuum tank is far away from the magnetic valve, the valve core seals the vent hole under the action of gravity, and the first air port is not communicated with the second air port; when the vacuum tank is close to the magnetic valve, the magnetic attraction force generated by the magnet to the ferromagnetic substance makes the valve core far away from the vent hole to open the vent hole, and the first air port is communicated with the second air port. The utility model discloses when taking away/installing the vacuum tank, the magnetic valve can self-closing/open, need not artifical manually operation, can avoid operating personnel because of forgetting the condition that opens or close the valve and lead to vacuum system inefficacy.

Description

Magnetic valve for vacuum tank and vacuum storage device

Technical Field

The utility model belongs to the technical field of the vacuum storing, concretely relates to magnetic valve and vacuum storage device for vacuum tank.

Background

Vacuum storage can extend the shelf life of the article and is widely used. At present, the common vacuum preservation box in the market is a household vacuum preservation box, the volume of the vacuum preservation box is small, and the vacuum preservation box is vacuumized by a portable vacuum pump. For some vacuum tanks with larger volume (such as storing grains, medical equipment and the like), especially when a plurality of vacuum tanks are arranged, a special vacuum-pumping device is used for vacuumizing the vacuum tanks. The vacuumizing device comprises a vacuum pump and a plurality of suction pipes which are connected in parallel and connected with an air inlet of the vacuum pump, the suction pipes are connected with suction ports on the vacuum tank, on-off valves for controlling the on-off of the suction pipes are arranged on the suction pipes, and the on-off valves are generally electronic valves or manual valves.

When the vacuum tank is required to be disconnected from the vacuumizing device, and the on-off valve adopts an electronic valve, the electronic valve has more pipeline connections, larger volume and high control cost; when the on-off valve adopts the manual valve, although the manual valve is simple in structure and low in cost, the on-off valve on the suction tube needs to be manually closed, the manual control is adopted, the error is easy, for example, people may forget to close the on-off valve, at the moment, the suction tube of the disconnected vacuum tank is communicated with the outside atmosphere, so that the whole vacuumizing device fails, and the vacuum pump cannot vacuumize other vacuum tanks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem existing in the prior art, and the utility model aims at providing a magnetic valve for vacuum tank. The second objective of the present invention is to provide a vacuum storage device using the magnetic valve.

In order to achieve the first objective, the utility model adopts the following technical scheme: the magnetic valve for the vacuum tank comprises a valve seat and a valve body which is positioned in the valve seat and fixedly connected with the valve seat, wherein the valve seat is provided with a first air port and a second air port which are communicated with the interior of the valve seat, the valve body is provided with a vent hole which is communicated with the first air port and the second air port simultaneously, and the interior of the valve seat is also movably connected with a valve core which can seal the vent hole; the magnetic valve also comprises a magnet and a ferromagnetic substance which can be attracted by the magnet, one of the magnet and the ferromagnetic substance is fixedly connected with the bottom of the vacuum tank, and the other one is fixedly connected with the valve core; when the vacuum tank is far away from the magnetic valve, the valve core seals the vent hole under the action of gravity, and the first air port is not communicated with the second air port; when the vacuum tank is close to the magnetic valve, under the action of magnetic attraction force generated by the magnet on the ferromagnetic substance, the valve core is far away from the vent hole to open the vent hole, and the first air port is communicated with the second air port.

Among the above-mentioned technical scheme, taking away the vacuum tank back, ferromagnetic substance loses the magnetic attraction of magnet, and the case seals the air vent under the effect of gravity to make the magnetic valve be in the off-state, need not artifical manual closing. After the vacuum tank is installed, the magnet generates suction force on the ferromagnetic substance, so that the valve core is far away from the valve body to open the vent hole, and the magnetic valve is in an open state and does not need manual opening. The utility model discloses when taking away/installing the vacuum tank, the magnetic valve can self-closing/open, need not artifical manually operation, can avoid operating personnel because of forgetting the condition that opens or close the valve and lead to vacuum system inefficacy.

In a preferred embodiment of the present invention, the magnet is a magnet or a magnet; the ferromagnetic substance is an iron block, or the ferromagnetic substance is a magnet or magnetite having a magnetic pole opposite to that of the magnet.

The utility model discloses an in a preferred embodiment, the vacuum tank is located the top of magnetic valve, and the bottom detachable of vacuum tank installs on the base, and the magnetic valve embedding is in the base, disk seat and base fixed connection.

In a preferred embodiment of the invention, the magnet/ferromagnetic substance is arranged in the valve seat and is connected to the valve seat in a sliding manner.

In the technical scheme, the magnet/ferromagnetic substance guides the movement of the valve core, so that the valve core moves more smoothly.

In another preferred embodiment of the present invention, the bottom of the vacuum tank is provided with a blind hole, the ferromagnetic material/magnet is located in the blind hole, and the blind hole is further fixedly connected with a plug covering the ferromagnetic material/magnet.

In the technical scheme, the blockage shields the ferromagnetic substance/magnet, so that the conditions of abrasion, rusting and the like of the ferromagnetic substance/magnet are reduced, and the service life is prolonged.

In another preferred embodiment of the present invention, the valve seat further has a third air port communicating with the interior thereof, and the third air port is always communicated with the first air port.

Among the above-mentioned technical scheme, make this magnetic valve be the three-way valve through setting up the third gas port, can be used to the reposition of redundant personnel.

In another preferred embodiment of the present invention, the valve seat is vertically disposed, the valve core is intermittently disposed above the valve body, the first air port is disposed on one side of the valve seat, and the second air port and the third air port are disposed on the other side of the valve seat.

In order to achieve the second purpose, the utility model adopts the following technical scheme: vacuum storage device, including vacuum tank, be used for installing vacuum tank's base, give vacuum tank evacuation's vacuum pump and the vacuum tank who provides of this application and use the magnetic valve, the magnetic valve embedding is in the base, and the first gas port of magnetic valve communicates through the air inlet of first trachea with the vacuum pump, and the second gas port of magnetic valve can communicate through the suction mouth of second trachea with vacuum tank.

In order to achieve the second objective, the utility model adopts the following technical proposal: the vacuum storage device comprises at least one vacuum tank, bases for mounting the vacuum tanks, a vacuum pump for vacuumizing the vacuum tanks and the magnetic valves for the vacuum tanks, wherein one magnetic valve is embedded in each base, and when the number of the vacuum tanks is two or more, the two or more vacuum tanks are cascaded; the first air port of the magnetic valve in the base is communicated with a vacuum pump or a third air port of the base of a superior vacuum tank through a first air pipe, the second air port of the magnetic valve in the base is communicated with a suction port of a corresponding vacuum tank through a second air pipe, and the third air port of the magnetic valve in the base of the last-stage vacuum tank is connected with a plug or a stop valve for sealing the magnetic valve.

Among the above-mentioned technical scheme, the magnetic valve is the three-way valve, through setting up a plurality of magnetic valves for a plurality of vacuum tanks can be cascaded to vacuum storage device, takes away wherein arbitrary one or more vacuum tank back, does not influence the evacuation work of other vacuum tanks moreover.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a magnetic valve for a vacuum tank according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the vacuum canister remote from the magnetic valve, with the magnetic valve in a closed state.

Fig. 3 is a schematic diagram of the vacuum tank in proximity to the magnetic valve, with the magnetic valve in an open state.

Fig. 4 is a schematic view of a vacuum storage device according to a second embodiment.

Fig. 5 is a schematic view of a vacuum tank of fig. 4 removed.

Fig. 6 is a schematic view of a vacuum storage device according to a third embodiment.

FIG. 7 is a schematic view of a vacuum storage apparatus according to a fourth embodiment.

Reference numerals in the drawings of the specification include: the vacuum pump 100, the first air pipe 101, the second air pipe 102, the third air pipe 103, the plug 104, the magnetic valve 200, the valve seat 210, the first air port 211, the second air port 212, the third air port 213, the valve body 220, the vent hole 221, the valve core 230, the magnet 240, the sealing cover 250, the vacuum tank 500, the ferromagnetic substance 501, the plug 502, the fourth port 503, the fifth port 504, the upper cover 510, the suction port 511, the first check valve 512, the second check valve 513, the handle 520, the base 600, the first port 601, the second port 602, and the third port 603.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected" and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and those skilled in the art may understand the specific meanings of the above terms according to specific situations.

Example one

In the present embodiment, as shown in fig. 1 to fig. 3, in a preferred embodiment, the magnetic valve 200 includes a valve seat 210 and a valve body 220 located in the valve seat 210 and fixedly connected to the valve seat 210, the valve body 220 and the valve seat 210 are both made of plastic, and the valve body 220 and the valve seat 210 are integrally injection-molded or separately arranged and then fixedly connected to each other. The valve seat 210 has a first gas port 211 and a second gas port 212 communicating with the interior thereof. The valve body 220 has a vent hole 221 communicating with both the first gas port 211 and the second gas port 212, and a valve body 230 capable of closing the vent hole 221 is movably connected to the inside of the valve seat 210. The valve seat 210 is vertically arranged, the valve core 230 moves from top to bottom to close the vent hole 221, the first air port 211 is positioned on one side of the valve seat 210, and the second air port 212 is positioned on the other side of the valve seat 210.

The utility model discloses a magnetism valve 200 still includes ferromagnetic substance 501 and the magnet 240 that can be attracted by ferromagnetic substance 501, and one of ferromagnetic substance 501 and magnet 240 rigid coupling is in vacuum tank 500's bottom, another and case 230 rigid coupling, for example magnet 240 and case 230 rigid coupling just are located inside case 230, and ferromagnetic substance 501 is located vacuum tank 500 bottom. The magnet 240 is a magnet or a magnetite, and the exterior of the magnet 240 is sprayed with antirust paint; the ferromagnetic material 501 is an iron block, or the ferromagnetic material 501 is a magnet or a magnet having a magnetic pole opposite to that of the magnet 240.

As shown in fig. 2 and 4, in the present embodiment, the vacuum tank 500 is positioned above the magnetic valve 200, the bottom of the vacuum tank 500 is detachably mounted on the base 600, the magnetic valve 200 is embedded in the base 600, the valve seat 210 is fixedly connected to the base 600, and the base 600 closes the upper end of the valve seat 210. The first air port 211 can be connected to an air inlet of the vacuum pump 100 through the first air pipe 101, and the second air port 212 can be connected to a suction port 511 of the vacuum tank 500 through the second air pipe 102.

When the vacuum tank 500 is removed from the base 600, as shown in fig. 2, the vacuum tank 500 is far away from the magnetic valve 200, the valve core 230 closes the vent hole 221 under the gravity force, the first vent 211 and the second vent 212 are not communicated, and the magnetic valve 200 is closed. As shown in fig. 3, when the vacuum tank 500 is mounted on the base 600, the vacuum tank 500 approaches the magnetic valve 200, the magnet 240 inside the magnetic valve 200 generates a magnetic attraction force to the ferromagnetic substance 501 at the bottom of the vacuum tank 500, the magnetic attraction force moves the valve member 230 upward and away from the vent hole 221, thereby opening the vent hole 221, the first air port 211 and the second air port 212 communicate, and the magnetic valve 200 opens.

Adopt the utility model discloses a magnetic valve 200, after taking away vacuum tank 500 from base 600, magnet 240 loses the magnetic attraction to ferromagnetic substance 501, and case 230 downstream and seal air vent 221 under the effect of gravity to make magnetic valve 200 be in the off-state, need not artifical manual closing. After the vacuum tank 500 is mounted on the base 600, the magnet 240 generates a suction force to the ferromagnetic substance 501, so that the valve core 230 moves upward to open the vent hole 221, thereby placing the magnetic valve 200 in an open state without manual opening.

In another preferred embodiment, as shown in fig. 2 and 3, a magnet 240 is provided in the valve seat 210 and is vertically slidably coupled to the valve seat 210. As shown in FIG. 2, when the magnetic valve 200 is in the closed state, the magnet 240 does not close the second gas port 212, and the second gas port 212 communicates with the interior of the valve seat 210.

In another preferred embodiment, as shown in fig. 2, the bottom of the vacuum tank 500 is provided with a blind hole, the ferromagnetic material 501 is located in the blind hole, a plug 502 for covering the ferromagnetic material 501 is further fixed in the blind hole, the plug 502 is made of a material without magnetic isolation, and the plug 502 does not affect the ferromagnetic material 501 to suck the magnet 240 upwards to open the magnetic valve, for example, the plug 502 is made of rubber.

As shown in fig. 1 and 2, the valve seat 210 further has a third air inlet 213 communicated with the inside thereof, the third air inlet 213 is connected to the third air pipe 103, the third air inlet 213 is always communicated with the first air inlet 211, and when the magnetic valve 200 is in the closed state, the third air inlet 213 is not communicated with the second air inlet 212. Preferably, the third gas port 213 is collinear with the first gas port 211, the third gas port 213 being on the same side as the second gas port 212, the second gas port 212 being above the third gas port 213. The magnetic valve 200 is made a three-way valve by providing a third gas port 213 for the split flow.

Example two

The present embodiment provides a vacuum storage apparatus, as shown in fig. 4, which in a preferred embodiment comprises a vacuum pump 100 and a plurality of vacuum tanks 500, the plurality of vacuum tanks 500 being laterally cascaded. Each vacuum tank 500 is correspondingly installed on a base 600 below the vacuum tank, the magnetic valve 200 in the first embodiment is installed in each base 600, and the magnetic valve 200 is a three-way valve.

In the present embodiment, the vacuum pump 100 is located at the leftmost side, and three vacuum tanks 500 are provided as an example, and the three vacuum tanks 500 have the same structure and principle, and the three bases 600 have the same structure and principle. A first port 601 capable of being connected to the vacuum pump 100 or the upper vacuum tank 500 is formed at the left side of the base 600, and the first port 601 is connected to and communicated with the first air pipe 101; the top of the base 600 is provided with a second interface 602 connected with the corresponding vacuum tank 500, and the second interface 602 is connected and communicated with the second air pipe 102; the right side of the base 600 is provided with a third interface 603 connected with the base 600 of the lower vacuum tank 500, and the third interface 603 is connected and communicated with a third air pipe 103; the third port 603 of the base 600 of the final stage vacuum tank 500 is provided with a plug 104 or a stop valve for closing the third port 603. The vacuum tank 500 has a connection pipe disposed through a handle thereof, a lower end of the connection pipe extends to a bottom of the vacuum tank 500, an upper end of the connection pipe is connected to a suction port 511 of an upper cover 510 of the vacuum tank 500, the suction port 511 is communicated with an inside of the vacuum tank 500, the second air pipe 102 is provided with a first check valve 512 for allowing only air inside the vacuum tank 500 to flow toward the magnetic valve 200, and the first check valve 512 is disposed near the suction port 511.

Specifically, the first air pipe 101 of the left base 600 is connected to the air inlet of the vacuum pump 100 through a first connector 601, and the second air pipe 102 of the left base 600 is connected to the lower end of the corresponding connecting pipe in the vacuum tank 500 through a second connector 602. The third air pipe 103 of the left base 600 is connected to the first air pipe 101 of the middle base 600, and the second air pipe 102 of the middle base 600 is connected to the corresponding suction port 511 of the upper cover 510 of the vacuum tank 500. The third air pipe 103 of the middle base 600 is connected with the first air pipe 101 of the right base 600, the second air pipe 102 of the right base 600 is connected with the corresponding suction port 511 on the upper cover 510 of the vacuum tank 500, and the third port 603 of the right base 600 is provided with a plug 104 or a stop valve for sealing the third air pipe 103.

After the three vacuum tanks 500 are all mounted on the respective bases 600, the magnetic valves 200 in the three bases 600 are all opened, and the vacuum pump 100 is activated to evacuate the three vacuum tanks 500. As can be seen from fig. 3, the magnetic attraction force exerted by the magnet 240 on the ferromagnetic substance 501 is greater than the negative pressure when the vacuum pump 100 is vacuumized, so as to ensure that the magnetic valve 200 is in the open state when the vacuum pump is vacuumized. Since the first check valve 512 is disposed at the suction port 511 of each vacuum tank 500, the gas in each vacuum tank 500 can be prevented from being mixed, the smell can be prevented from being mixed, and the vacuum in each vacuum tank 500 can be independent, so that when a plurality of vacuum tanks 500 are cascaded, the vacuum of all vacuum tanks 500 can not be released because of the vacuum release of one vacuum tank 500.

It should be noted that how the vacuum pump 100 only vacuumizes the designated vacuum tank 500 is not a new point of the present invention and is not described herein.

As shown in fig. 5, after removing one vacuum tank 500, for example, after removing the middle vacuum tank 500, the magnetic valve 200 in the middle base 600 is automatically closed, and as can be seen from fig. 2, at this time, the first air port 211 and the third air port 213 of the magnetic valve 200 of the middle base 600 are still communicated, and then the third air pipe 103 of the left base 600 is communicated with the first air pipe 101 of the right base 600 through the first air pipe 101 and the third air pipe 103 of the middle base 600 in sequence. Therefore, after the middle vacuum tank 500 is removed, the vacuum pump 100 is started, and the vacuum tanks 500 on the left and right sides can be vacuumized, so that the vacuuming operation of the remaining two vacuum tanks 500 is not influenced.

EXAMPLE III

The present embodiment provides a vacuum storage apparatus, and the structure and principle of the present embodiment are substantially the same as those of the second embodiment, except that, as shown in fig. 6, in the present embodiment, a plurality of vacuum tanks 500 are vertically cascaded, and the structure and principle of the plurality of vacuum tanks 500 are the same. When a plurality of vacuum tanks 500 are vertically cascaded, the magnetic valve 200 of the first embodiment is disposed in the upper cover 510 at the top of the vacuum tank 500, and the bottom of the upper vacuum tank 500 is mounted on the upper cover 510 of the lower vacuum tank 500, so that the upper cover 510 of the lower vacuum tank 500 corresponds to a base.

In this embodiment, three vacuum tanks 500 are vertically installed, and the vacuum pump 100 is located at the leftmost side and connected to the lowermost base 600, and the lowermost vacuum tank 500 connected to the base 600 is the first-stage vacuum tank 500, the middle vacuum tank 500 is the second-stage vacuum tank 500, and the uppermost vacuum tank 500 is the third-stage vacuum tank 500.

The bottom of the vacuum canister 500 has a fourth interface 503 and the top of the vacuum canister 500 has a fifth interface 504. The vacuum tank 500 can be connected to the second port 602 of the base 600 or the fifth port 504 of the upper vacuum tank 500 through the fourth port 503, and the fourth port 503 is connected to and communicates with the second air pipe 102 of the base 600 or the second air pipe 102 of the upper vacuum tank 500. The first air pipe 101 connected with the magnetic valve 200 in the upper cover 510 of the vacuum tank 500 is connected with the fourth interface 503 at the bottom of the vacuum tank 500, and the second air pipe 102 in the upper cover 510 of the vacuum tank 500 is connected 504 with the fifth interface; the third air pipe 103 of the upper lid 510 of the vacuum tank 500 is connected to the suction port 511 of the upper lid 510, the third air pipe 103 is provided with a first check valve 512 for allowing only the air in the vacuum tank 500 to flow toward the magnetic valve 200, and the first check valve 512 is provided near the suction port 511.

When the magnetic valve 200 is provided in the base 600, the base 600 may close the upper end opening of the valve seat 210, and a cap may not be provided. When the magnetic valve 200 is installed in the upper cap 510, as shown in fig. 6, the upper end opening of the valve seat 210 is not closed, and thus the cover 250 is required to close.

Specifically, the first air pipe 101 of the base 600 is connected to an air inlet of the vacuum pump 100, a plug 104 or a stop valve for closing the third air pipe 103 is disposed on the right side of the base 600, the second air pipe 102 of the base 600 is connected to the fourth port 503 at the bottom of the lowermost vacuum tank 500 through the second port 602, the fifth port 504 at the top of the lowermost vacuum tank 500 is connected to the fourth port 503 at the bottom of the intermediate vacuum tank 500, and the fifth port 504 at the top of the intermediate vacuum tank 500 is connected to the fourth port 503 at the bottom of the intermediate vacuum tank 500. Since the vacuum tank 500 is not mounted on the uppermost vacuum tank 500, the magnetic valve 200 in the upper cover 510 of the uppermost vacuum tank 500 is in a closed state.

After the three vacuum tanks 500 are vertically cascaded, the magnetic valves 200 in the upper covers 510 of the base 600 and the two vacuum tanks 500 below are both in an open state, and the magnetic valve 200 in the upper cover 510 of the uppermost vacuum tank 500 is in a closed state, so that the three vacuum tanks 500 can be evacuated by starting the vacuum pump 100. Since the first check valve 512 is disposed at the suction port 511 of each vacuum tank 500, the gas in each vacuum tank 500 can be prevented from being mixed with each other, and the smell can be prevented from being mixed with each other. How the vacuum pump 100 only vacuumizes the designated vacuum tank 500 is not an innovative point of the present invention and is not described herein.

In another preferred embodiment, as shown in fig. 6, the first air pipe 100 connected to the magnetic valve 200 at the top of the vacuum tank 500 is connected to the fourth port 503 at the bottom of the vacuum tank, and a second one-way valve 513 is disposed on the pipeline for only allowing air to flow downward from the first air pipe 100 to the fourth port 503. Therefore, when one vacuum tank 500 is used alone, one can remove the vacuum pump 100 or use another handheld vacuum pump to align the air inlet of the vacuum pump 100 with the fifth port 504 at the top of the upper cover 510 of the vacuum tank 500, and then start the vacuum pump 100, as shown in fig. 2 and 3, the negative pressure makes the valve core 230 move upwards to open the magnetic valve 200, so that the second air pipe 102 connected with the magnetic valve 200 is communicated with the third air pipe 103 and the first air pipe 101 at the same time, and due to the action of the second one-way valve 513, the vacuum pump 100 only vacuums the vacuum tank 500 connected with the vacuum pump 100 to realize the one-tank moving air-suction sealing function of the vacuum tank 500, and at this time, the air in the vacuum tank 500 is exhausted from the vacuum pump 100 after passing through the third air pipe 103, the magnetic valve 200 and the second air pipe 102.

Example four

The present embodiment provides a vacuum storage apparatus, and the structure and principle of the present embodiment are substantially the same as those of the second and third embodiments, except that, as shown in fig. 7, in the present embodiment, a plurality of vacuum tanks 500 are cascaded in the horizontal and vertical directions. Fig. 7 shows nine vacuum tanks 500 arranged, the nine vacuum tanks 500 forming a grid of nine squares, three rows and three columns. The connection mode and the working principle of the vertical cascade are detailed in the third embodiment, which is not described herein again; in the horizontal cascade, only the bottom row of vacuum tanks 500 is mounted on the base 600, and the connection manner and operation principle thereof are described in detail in the second embodiment, which is not repeated herein. The vacuum tanks 500 in each row are communicated with each other through the lowermost base 600, and there is no connection interface between each row of vacuum tanks 500 and the vacuum tanks 500.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. The magnetic valve for the vacuum tank is characterized by comprising a valve seat and a valve body which is positioned in the valve seat and fixedly connected with the valve seat, wherein the valve seat is provided with a first air port and a second air port which are communicated with the interior of the valve seat, the valve body is provided with a vent hole which is communicated with the first air port and the second air port simultaneously, and the interior of the valve seat is also movably connected with a valve core which can seal the vent hole;

the magnetic valve also comprises a magnet and a ferromagnetic substance which can be attracted by the magnet, one of the magnet and the ferromagnetic substance is fixedly connected at the bottom of the vacuum tank, and the other is fixedly connected with the valve core;

when the vacuum tank is far away from the magnetic valve, the valve core seals the vent hole under the action of gravity, and the first air port and the second air port are not communicated; when the vacuum tank is close to the magnetic valve, under the action of magnetic attraction force generated by the magnet on the ferromagnetic substance, the valve core is far away from the vent hole to open the vent hole, and the first air port is communicated with the second air port.

2. The magnetic valve for a vacuum tank according to claim 1, wherein the magnet is a magnet or a magnetite; the ferromagnetic substance is an iron block, or the ferromagnetic substance is a magnet or a magnet with a magnetic pole opposite to that of the magnet.

3. The magnetic valve for vacuum tank as claimed in claim 1, wherein the vacuum tank is located above the magnetic valve, the bottom of the vacuum tank is detachably mounted on the base, the magnetic valve is embedded in the base, and the valve seat is fixedly connected with the base.

4. The magnetic valve for a vacuum canister according to claim 1, wherein the magnet/ferromagnetic substance is provided in the valve seat and slidably connected to the valve seat.

5. The magnetic valve for a vacuum tank as claimed in claim 1, wherein the bottom of the vacuum tank is provided with a blind hole, the ferromagnetic substance/magnet is located in the blind hole, and a plug for covering the ferromagnetic substance/magnet is further fixed in the blind hole.

6. The magnetic valve for vacuum tank as claimed in any one of claims 1 to 5, wherein the valve seat further has a third gas port communicating with the inside thereof, the third gas port always communicating with the first gas port.

7. The magnetic valve for vacuum tank as claimed in claim 6, wherein the valve seat is vertically disposed, the valve body is intermittently disposed above the valve body, the first air port is disposed at one side of the valve seat, and the second and third air ports are disposed at the other side of the valve seat.

8. Vacuum storage device comprising a vacuum tank, a base for mounting the vacuum tank, a vacuum pump for evacuating the vacuum tank, and a magnetic valve for a vacuum tank according to any of claims 1 to 7, characterized in that the magnetic valve is embedded in the base, the first air port of the magnetic valve being in communication with the air inlet of the vacuum pump via a first air pipe, the second air port of the magnetic valve being capable of being in communication with the suction port of the vacuum tank via a second air pipe.

9. A vacuum storage apparatus comprising at least one vacuum tank, a base for mounting the vacuum tank, a vacuum pump for evacuating the vacuum tank, and the magnetic valve for a vacuum tank according to claim 6 or 7, wherein one magnetic valve is embedded in each base, and when the number of the vacuum tanks is two or more, the two or more vacuum tanks are cascaded;

the first gas port of magnetic valve in the base communicates through the third gas port of the base of first trachea and vacuum pump or higher level vacuum tank, and the second gas port of magnetic valve in the base can communicate with the suction mouth of the vacuum tank that corresponds through the second trachea, and the third gas port of magnetic valve is connected with and is used for its confined stopper or stop valve in the base of last one-level vacuum tank.

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