CN216588995U

CN216588995U - Vacuum extractor with from pressure release function

Info

Publication number: CN216588995U
Application number: CN202122763189.8U
Authority: CN
Inventors: 杨立义; 余先杰; 葛书发; 刘肖
Original assignee: Guangdong Liyea Technologies Co ltd
Current assignee: Guangdong Liyea Technologies Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-24
Anticipated expiration: 2031-11-11

Abstract

The utility model discloses a vacuum-pumping device with a self-pressure-relief function, which comprises a shell and a vacuum pump arranged in the shell, wherein the shell comprises a bottom shell, an air suction hole, a pressure-relief hole and an annular main sealing ring are arranged on the bottom shell, the air suction hole and the pressure-relief hole are both positioned in the area surrounded by the main sealing ring, the vacuum pump is communicated with the air suction hole through an air suction pipeline, the air suction pipeline is provided with a one-way valve, and the pressure-relief hole is provided with a pressure-relief valve capable of opening and closing the pressure-relief hole. After the vacuumizing is completed, the pressure relief hole is opened through the pressure relief valve, so that external air can enter a closed space between the vacuumizing device and the vacuum tank, the pressure is relieved, and then the vacuumizing device can be easily taken down.

Description

Vacuum extractor with from pressure release function

Technical Field

The utility model relates to the technical field of vacuum pumping, in particular to a vacuum pumping device with a self-pressure-relief function.

Background

The vacuum tank, also called a vacuumized storage tank, is used for storing all articles which are easy to be affected with damp, oxidized and mildewed, and the sealing material generally adopts high-performance natural silica gel, so that a high vacuum state can be kept in the vacuum tank for a long time, and the functions of oxidation resistance, moisture resistance, moth resistance, mildew resistance and freshness preservation are achieved. The use method of the vacuum tank comprises the following steps: the vacuumizing device is arranged on a tank cover of the vacuum tank, is aligned with an air suction port on the tank cover and is sealed through a sealing ring, then, a vacuum pump in the vacuumizing device is started, and air in the tank can be sucked out through a one-way valve at the air suction port to form a vacuum state.

After the vacuumizing is completed, the vacuumizing device needs to be detached, and in the prior art, the vacuumizing device is generally detached in a mode of violently pulling out the vacuumizing device, so that the labor is very great, and the sealing structure between the vacuumizing device and the tank cover is easy to damage.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a vacuum pump with self-pressure-releasing function.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

the utility model provides a vacuum pump with from pressure release function, include the casing with set up in vacuum pump in the casing, the casing include the drain pan, be provided with aspirating hole, pressure release hole and annular main seal circle on the drain pan, aspirating hole and pressure release hole all are located the region that main seal circle encircles, the vacuum pump pass through bleed-off pipe with aspirating hole intercommunication, bleed-off pipe is provided with the check valve, pressure release hole department be provided with can open and seal the relief valve in pressure release hole.

As a further optimization scheme of the above scheme, the relief valve includes a valve core rod penetrating through the relief hole and capable of moving up and down, a sealing structure capable of plugging the relief hole is provided on the valve core rod, the relief hole is opened when the valve core rod moves down, and the valve core rod is connected with a reset elastic member capable of driving the valve core rod to reset upwards so as to close the relief hole.

As a further optimization scheme of the above scheme, a core seat fixed relative to the bottom case is arranged on the bottom case, a guide hole for guiding the valve core rod is arranged on the core seat, and the valve core rod is in sliding fit with the inner wall of the guide hole.

As a further optimized scheme of the above scheme, the upper end of the valve core rod extends out of the upper surface of the valve core seat, and the shell is provided with an elastic button capable of pressing down the valve core rod.

As a further optimization scheme of the above scheme, the sealing structure comprises a limiting sealing rubber block which is fixed at the lower end of the valve core rod and can block a gap between the valve core rod and the pressure relief hole.

As a further optimization scheme of the scheme, the upper surface of the limiting sealing rubber block is provided with an annular convex rib which can be pressed on the lower surface of the bottom shell.

As a further optimization scheme of the above scheme, an upward-bulging portion is arranged on the bottom shell, the pressure relief hole is formed in the bulging portion, a cavity with a downward opening is formed in the bulging portion, and the lower end portion of the valve core rod and the limiting sealing rubber block are both accommodated in the cavity.

As a further optimized solution of the above scheme, a boss located on the bottom case is arranged on the valve core rod, the reset elastic member is a spring sleeved on the valve core rod, the upper end of the spring is abutted against the boss, and the lower end of the spring is abutted against the bottom case.

As a further optimization scheme of the above scheme, a delay switch capable of controlling the vacuum pump to start and stop is arranged in the housing, and the delay switch is triggered when the elastic button is pressed.

As a further optimization scheme of the above scheme, the main sealing ring comprises a sealing ring base body and a sealing edge arranged at the lower part of the sealing ring base body, the sealing ring base body is mounted at the edge part of the bottom shell and is tightly attached to the bottom surface of the bottom shell, a V-shaped groove with an outward opening is formed between the sealing edge and the sealing ring base body, and a closed space is formed between the bottom shell and the vacuum tank when the sealing edge is tightly pressed on the vacuum tank.

As a further optimization scheme of the above scheme, a clamping groove with an inward opening is formed in the sealing ring base body, and a convex portion clamped into the clamping groove is formed in the edge of the bottom shell.

As a further optimization of the above solution, the thickness of the sealing edge gradually decreases from the fixed end to the free end thereof.

The utility model has the beneficial effects that:

1. when the vacuum-pumping device is used for vacuumizing the vacuum tank, the vacuum-pumping device is positioned and arranged at the top of the vacuum tank, and a closed space is formed between the vacuum tank and the main sealing ring. After the vacuumizing is completed, the pressure relief hole is opened through the pressure relief valve, so that external air can enter a closed space between the vacuumizing device and the vacuum tank, the pressure is relieved, and then the vacuumizing device can be easily taken down.

2. When the vacuum-pumping device is arranged on the vacuum tank, the sealing edge can be pressed on the upper surface of the tank cover under the action of the gravity of the vacuum-pumping device, and sealing is automatically formed. When being in vacuum state between vacuum tank and the evacuation ware, because form a V-arrangement groove between sealing edge and the sealing washer base member, under atmospheric pressure, can push down the sealing edge, upwards push the sealing washer base member simultaneously, make the sealing washer base member hug closely the evacuation ware casing, the upper surface of cover is hugged closely to the sealing edge, and then reaches excellent sealed effect.

Drawings

FIG. 1 is a cross-sectional view of a vacuum extractor mounted on a vacuum canister;

FIG. 2 is a cross-sectional view of the vacuum;

FIG. 3 is an enlarged view of portion B of FIG. 2;

FIG. 4 is an exploded view of the vacuum;

fig. 5 is an enlarged view of a portion a in fig. 1.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "preferred", "less preferred", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 5, an embodiment of the present invention provides a vacuum extractor with a self-pressure-releasing function, including a casing 1 and a vacuum pump 2 disposed in the casing 1, where the casing 1 includes a bottom shell 11, an upper shell 12 and a lower shell 13, and the bottom shell 11, the upper shell 12 and the lower shell 13 may be formed by injection molding or may be formed by a split structure. Be provided with aspirating hole 111, pressure release hole 112 and annular main sealing washer 3 on the drain pan 11, aspirating hole 111 and pressure release hole 112 all are located the region that main sealing washer 3 encircles, and vacuum pump 2 passes through bleed-off pipe and aspirating hole 111 intercommunication, and the bleed-off pipe is provided with check valve 4, and pressure release hole 112 department is provided with the relief valve that can open and seal pressure release hole 112.

Referring to fig. 1, when the vacuum pump 100 of the present invention pumps a vacuum in a vacuum tank 200, the vacuum pump 100 is positioned on the top of the vacuum tank 200, and a closed space is formed therebetween by a main packing 3. Then, the vacuum pump 2 in the vacuum pump 100 is turned on, so that the air in the vacuum tank 200 can be evacuated. After the vacuum pumping is completed, the pressure relief hole 112 is opened through the pressure relief valve, so that the external air can enter the space between the vacuum pumping device 100 and the vacuum tank 200, the pressure is removed, and then the vacuum pumping device 100 can be easily taken down.

In a preferred embodiment of the present invention, the relief valve includes a valve core rod 51 penetrating through the relief hole 112 and capable of moving up and down, a sealing structure capable of blocking the relief hole 112 is disposed on the valve core rod 51, the relief hole 112 is opened when the valve core rod 51 moves down, and the valve core rod 51 is connected with a return elastic member 52 capable of driving the valve core rod to return up to close the relief hole 112. Specifically, the sealing structure comprises a limit sealing rubber block 53 which is fixed at the lower end of the valve core rod 51 and can block the gap between the valve core rod 51 and the pressure relief hole 112. In the scheme, the valve core rod 51 is moved downwards, so that the limiting sealing rubber block 53 can be separated from the bottom shell 11, and the pressure relief hole 112 is opened; after the pressure relief is finished, the pressure relief hole 112 is automatically reset upwards under the action of the reset elastic piece, and then the pressure relief hole is closed.

As a further improvement of the above scheme, the upper surface of the limiting sealing rubber block 53 is provided with an annular convex rib 531 which can be pressed on the lower surface of the bottom shell 11. The design of annular protruding muscle 531 can reduce drain pan 11 and spacing sealed glue block 53's area of contact, promotes sealed effect.

As a further improvement of the above scheme, an upward-bulging portion 113 is provided on the bottom case 11, the pressure relief hole 112 is provided in the bulging portion 113, a cavity with a downward opening is formed in the bulging portion 113, and the lower end portion of the valve core rod 51 and the position-limiting sealing rubber block 53 are both accommodated in the cavity. With this structure, more space for downward movement can be reserved for the spool rod 51.

Preferably, the valve core rod 51 is provided with a boss 511 located on the bottom case 11, the return elastic element 52 is a spring sleeved on the valve core rod 51, the upper end of the spring abuts against the boss 511, and the lower end of the spring abuts against the bottom case 11.

As a further improvement of the above scheme, a core print 6 fixed relative to the bottom shell 11 is provided on the bottom shell 11, a guide hole 61 for guiding the valve core rod 51 is provided on the core print 6, and the valve core rod 51 is in sliding fit with the inner wall of the guide hole 61. With this structure, the valve body rod 51 can be guided, and the smoothness of movement of the valve body rod 51 can be improved.

Specifically, the upper end of the valve core rod 51 extends out of the upper surface of the valve core seat 6, and the shell 1 is provided with an elastic button 7 capable of pressing down the valve core rod 51. The elastic button 7 includes a button member 71 and a return spring 72, and when the button member 71 is pressed down, the spool rod 51 is pressed down, so that the relief hole 112 is opened to release the pressure.

Furthermore, a delay switch 8 capable of controlling the vacuum pump 2 to start and stop is arranged in the housing 1, and when the elastic button 7 is pressed, the valve core rod 51 is pressed downwards, and the delay switch 8 is triggered. In this scheme, when carrying out the evacuation to vacuum tank 200, press elastic button 7, then loose the hand, treat the case pole 51 back that resets, start vacuum pump 2, carry out the evacuation to vacuum tank 200, after the evacuation is accomplished, press elastic button 7 once more, can the pressure release, then light pull down evacuation ware 100. When the elastic button 7 is pressed for the second time, although the delay switch 8 is also touched, the use program can be set, so that the vacuum pump 2 cannot be started within a period of time after being stopped, and the problem that the vacuum pump 2 is started again is avoided. In this scheme, the switch function of relief valve and vacuum pump 2 has integrateed on the elastic button 7, is favorable to simplifying the structure, reduce cost.

In a modified embodiment of the present invention, the main sealing ring 3 includes a sealing ring base 31 and a sealing edge 32 disposed at a lower portion of the sealing ring base 31, the sealing ring base 31 is mounted at an edge portion of the bottom shell 11 and is in close contact with a bottom surface of the bottom shell 11, a V-shaped groove 33 with an outward opening is formed between the sealing edge 32 and the sealing ring base 31, and a closed space is formed between the bottom shell 11 and the vacuum tank 200 when the sealing edge 32 is pressed against the vacuum tank 200. Specifically, the seal ring base 31 is provided with a locking groove 311 with an inward opening, and the edge of the bottom case 11 is provided with a protrusion 114 locked into the locking groove 311. When the main seal ring 3 is mounted, the seal ring base 31 is fixed by the engagement of the protrusion 114 with the engaging groove 311, and preferably, the protrusion 114 is in interference fit with the engaging groove 311.

When the vacuum extractor 100 is attached to the vacuum tank 200, the sealing edge 32 is pressed against the upper surface of the tank lid by the gravity of the vacuum extractor 100, thereby automatically forming a seal. When the vacuum tank 200 and the vacuum extractor 100 are in a vacuum state, because a V-shaped groove 33 is formed between the sealing edge 32 and the sealing ring base 31, the sealing edge 32 is pressed downwards under the pressure of the atmospheric pressure, and the sealing ring base 31 is pressed upwards at the same time, so that the sealing ring base 31 is tightly attached to the shell 1 of the vacuum extractor 100, and the sealing edge 32 is tightly attached to the upper surface of the tank cover, thereby achieving an excellent sealing effect.

Further, the sealing edge 32 has a thickness that gradually decreases from a fixed end to a free end thereof. With such a structure, the pressure bearing capacity of the sealing edge 32 is gradually reduced from the fixed end to the free end, and the free end of the sealing edge 32, i.e., the edge of the sealing edge 32, can be ensured to be closely attached to the upper surface of the can lid under the atmospheric pressure.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical scope of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a vacuum extractor with from pressure release function, its characterized in that, include casing (1) and set up in vacuum pump (2) in casing (1), casing (1) including drain pan (11), be provided with aspirating hole (111), pressure release hole (112) and annular main seal circle (3) on drain pan (11), aspirating hole (111) and pressure release hole (112) all are located the region that main seal circle (3) encircle, vacuum pump (2) through bleed-off line with aspirating hole (111) intercommunication, bleed-off line is provided with check valve (4), pressure release hole (112) department be provided with the relief valve that can open and seal pressure release hole (112).

2. The vacuum extractor with the self-pressure-relief function according to claim 1, wherein the pressure relief valve comprises a valve core rod (51) which penetrates through the pressure relief hole (112) and can move up and down, a sealing structure which can block the pressure relief hole (112) is arranged on the valve core rod (51), the pressure relief hole (112) is opened when the valve core rod (51) moves down, and the valve core rod (51) is connected with a resetting elastic piece (52) which can drive the valve core rod to reset upwards so as to close the pressure relief hole (112).

3. The vacuum extractor with the self-pressure-relief function according to claim 2, wherein a core seat (6) fixed relative to the bottom shell (11) is arranged on the bottom shell (11), a guide hole (61) for guiding the valve core rod (51) is arranged on the core seat (6), and the valve core rod (51) is in sliding fit with the inner wall of the guide hole (61).

4. The vacuum extractor with the function of self pressure relief according to claim 3, characterized in that the upper end of the valve core rod (51) extends out of the upper surface of the valve core seat (6), and the shell (1) is provided with an elastic button (7) capable of pressing the valve core rod (51).

5. The vacuum extractor with the self-pressure-relief function according to claim 2, wherein the sealing structure comprises a limiting sealing rubber block (53) which is fixed at the lower end of the valve core rod (51) and can block the gap between the valve core rod (51) and the pressure-relief hole (112).

6. The vacuum extractor with the self-pressure-relief function according to claim 5, wherein the upper surface of the limiting sealing rubber block (53) is provided with an annular convex rib (531) capable of being pressed on the lower surface of the bottom shell (11).

7. The vacuum extractor with the self-pressure-relief function according to claim 5, wherein a bulge portion (113) bulging upwards is arranged on the bottom shell (11), the pressure-relief hole (112) is arranged on the bulge portion (113), a cavity with a downward opening is formed in the bulge portion (113), and the lower end of the valve core rod (51) and the limiting sealing rubber block (53) are both accommodated in the cavity.

8. The vacuum extractor with the self-pressure-relief function according to claim 4, characterized in that a delay switch (8) capable of controlling the vacuum pump (2) to start and stop is arranged in the casing (1), and the delay switch (8) is triggered when the elastic button (7) is pressed.

9. The vacuum extractor with the self-pressure-relief function according to claim 1, wherein the main sealing ring (3) comprises a sealing ring base body (31) and a sealing edge (32) arranged at the lower part of the sealing ring base body (31), the sealing ring base body (31) is mounted at the edge part of the bottom shell (11) and is tightly attached to the bottom surface of the bottom shell (11), a V-shaped groove (33) with an outward opening is formed between the sealing edge (32) and the sealing ring base body (31), and when the sealing edge (32) is pressed on the vacuum tank (200), a closed space is formed between the bottom shell (11) and the vacuum tank (200).

10. The vacuum pumping device with the self-pressure-relief function according to claim 9, wherein a clamping groove (311) with an inward opening is formed on the sealing ring base body (31), and a protrusion (114) clamped into the clamping groove (311) is formed on the edge of the bottom shell (11).