CN212928865U - Air-extracting-free valve and vacuum compression bag - Google Patents

Abstract

The utility model provides an exempt from bleed valve and vacuum compression bag relates to articles for daily use technical field. The air exhaust-free valve comprises a base and a clamping cover which are movably connected, and further comprises a clamping component used for fixing the base and the clamping cover together; the base is equipped with first exhaust hole, and first exhaust hole is equipped with and is used for gaseous sealing washer to joint lid one side unidirectional flow from first exhaust hole, and the sealing washer is located between base and the joint lid. Adopt the utility model discloses an exempt from the bleed valve, do not need the air pump to bleed, utilize the manual work to discharge from the pneumatic valve with the gas in the carminative cavity of needs, need not seal immediately after the exhaust gas moreover, convenient operation does benefit to the popularization. The utility model discloses vacuum compression bag has still been proposed, including exempting from the bleed valve. Adopt the utility model discloses a vacuum compression bag, easy operation, convenient and fast when accomodating the object.

Description

Air-extracting-free valve and vacuum compression bag

Technical Field

The utility model relates to the technical field of articles for daily use, particularly, relate to and exempt from bleed valve and vacuum compression bag.

Background

In areas with much rainwater, the problems of high air humidity and heavy clothes and cotton quilts storage are always troubling people, and the vacuum compression bag is widely used by people due to the protection effects of water resistance, mildew resistance, moisture resistance and the like. The vacuum compression bag is mainly used for containing cotton quilts and various clothes, and its working principle is that the air in the cotton quilts and clothes is pumped out (like the sponge is pressed, it can be reduced) so as to reduce volume, and the expanded cotton quilts and other articles are flattened by utilizing atmospheric pressure so as to isolate external air, and can save space and obtain the functions of dust-proofing, mildew-proofing, moisture-proofing and insect-proofing.

Most vacuum compression bag on the market is equipped with the air cock at present, generally utilizes dust catcher or manual aspiration pump to take out the air in the bag during bleeding, and the air cock generally includes base, sealed lid, and the base is equipped with the chamber of breathing in, and in the time of the use, open sealed lid, with the aspiration pump facing to the air cock mouth, can exhaust, need screw sealed lid on the air cock at once after the exhaust is accomplished, prevent that outside gas from returning to the vacuum compression bag in countercurrent. The vacuum compression bag has a complex air exhaust process, an air exhaust pump is required, and the vacuum compression bag needs to be sealed immediately after air exhaust.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air exhaust valve exempts from, it does not need the air pump to bleed, utilizes the manual work to discharge from the pneumatic valve with the gas in the carminative cavity of needs, does not need to seal immediately after the exhaust gas moreover, and convenient operation does benefit to the popularization.

Another object of the utility model is to provide a vacuum compression bag, easy operation, convenient and fast when accomodating the object.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present application provides an exhaust-free valve, which includes a base and a clamping cover movably connected to each other, and further includes a clamping assembly for fixing the base and the clamping cover together. The base is equipped with first exhaust hole, and first exhaust hole is equipped with and is used for gaseous sealing washer to joint lid one side unidirectional flow from first exhaust hole, and the sealing washer is located between base and the joint lid. The air valve does not need to be pumped by an air pump, the air in the cavity needing to be exhausted is discharged from the air valve by manpower, and the air valve does not need to be immediately sealed after the air is discharged, so that the operation is convenient, and the popularization is facilitated.

Further, in some embodiments of the present invention, the above-mentioned clamping assembly includes a baffle, the baffle is fixed on one side of the base close to the clamping cover, and the baffle side wall is provided with a first limit flange. The clamping cover is provided with a guide block, and the guide block is provided with a second limiting flange matched with the first limiting flange.

Further, in some embodiments of the present invention, the baffle is circular, and the number of the first limiting flanges is plural and is arranged around the baffle sidewall at intervals.

Further, in some embodiments of the present invention, the above-mentioned joint assembly includes a baffle, one end of the baffle is fixed to one side of the base close to the joint cover, and the other end of the baffle is provided with a third limit flange. The clamping cover is provided with a guide plate, and the guide plate is provided with a fourth limiting flange matched with the third limiting flange.

Further, in some embodiments of the present invention, one side of the base close to the clamping cover is provided with a first clamping plate having an annular shape, the first vent hole is disposed in an annular region of the first clamping plate, and an inner diameter of the first clamping plate is smaller than an outer diameter of the sealing ring. The clamping cover is provided with an annular second clamping plate matched with the first clamping plate, and the sealing ring is arranged between the first clamping plate and the second clamping plate.

Further, in some embodiments of the utility model, above-mentioned sealing washer is equipped with spacing fixture block, and the base is equipped with and spacing fixture block complex spacing card hole.

Further, in some embodiments of the present invention, the outer diameter of the limiting clamping block is larger than the inner diameter of the limiting clamping hole.

Further, in some embodiments of the present invention, the clamping cover is provided with a second vent hole.

Further, in some embodiments of the present invention, one side of the base away from the clamping cover is provided with a stop block for preventing sundries from entering the first exhaust hole.

In a second aspect, embodiments of the present application provide a vacuum compression bag comprising the above-described evacuation-free valve. Simple operation, convenient and fast when accomodating objects.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

the embodiment of the utility model provides an exempt from bleed valve, including swing joint's base and joint lid, still including being used for the joint subassembly that is in the same place base, joint lid are fixed. The base is equipped with first exhaust hole, and first exhaust hole is equipped with and is used for gaseous sealing washer to joint lid one side unidirectional flow from first exhaust hole, and the sealing washer is located between base and the joint lid.

During the in-service use, after adorning article in the cavity, press the cavity, make the gas in the carminative cavity of needs discharge from first exhaust hole, because the sealing washer makes gas from first exhaust hole unidirectional flow, behind exhaust gas, prevent that the external gas from returning the cavity against the current, consequently, exhaust gas need not seal immediately afterwards, after the exhaust is accomplished, fix base and joint lid together through the joint subassembly, it is fixed to make the sealing washer of locating between base and the joint lid, increase the leakproofness of first exhaust hole, so it is sealed more stable to place the in-process for a long time, prevent gas leakage.

So the utility model provides an exempt from bleed valve does not need the air pump to bleed, utilizes the manual work to discharge from the pneumatic valve with the gas in needing carminative cavity, does not need to seal immediately after the exhaust gas moreover, and convenient operation does benefit to the popularization.

The embodiment of the utility model provides a vacuum compression bag is still provided, including foretell gassing valve of exempting from. Adopt this vacuum compression bag, easy operation, convenient and fast when accomodating the object.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.

Fig. 1 is a schematic view of an exhaust-free valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the bottom of the base in FIG. 1;

FIG. 3 is a schematic view of the snap-fit cover of FIG. 1;

fig. 4 is a schematic view of an exhaust-free valve according to another embodiment of the present invention;

fig. 5 is a schematic structural view of the snap cover in fig. 4.

Icon: 1-a base; 2-clamping a cover; 3-sealing ring; 4-a first venting aperture; 5-a second vent; 6-a baffle plate; 7-a first stop flange; 8-a second stop flange; 9-a third stop flange; 10-a fourth stop flange; 11-a guide block; 12-a guide plate; 13-limiting clamping block; 14-limiting clamp holes; 15-a first clamping plate; 16-a second clamping plate; 17-a stop.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1 and fig. 2, fig. 1 is a schematic view illustrating a structure of an exhaust-free valve according to an embodiment of the present invention; fig. 2 is a schematic structural view of the bottom of the base 1 in fig. 1.

The embodiment provides an air exhaust-free valve, which comprises a base 1 and a clamping cover 2 which are movably connected, and further comprises a clamping component for fixing the base 1 and the clamping cover 2 together; base 1 is equipped with first exhaust hole 4, and first exhaust hole 4 is equipped with and is used for gas to cover 2 one side unilaterally flowing's sealing washer 3 from first exhaust hole 4 to the joint, and sealing washer 3 is located between base 1 and the joint lid 2.

During the in-service use, after adorning article in the cavity, press the cavity, make the gas in the carminative cavity of needs discharge from first exhaust hole 4, because sealing washer 3 makes gas from first exhaust hole 4 one-way flow, after exhaust gas, prevent that the external gas from returning to the internal of cavity against the current, consequently, exhaust gas need not seal immediately afterwards, after the exhaust is accomplished, fix base 1 and joint lid 2 together through the joint subassembly, make and locate sealing washer 3 between base 1 and the joint lid 2 fixed, increase the leakproofness of first exhaust hole 4, so seal more stably in long-term process, prevent gas leakage.

So the utility model provides an exempt from bleed valve does not need the air pump to bleed, utilizes the manual work to discharge from the pneumatic valve with the gas in the carminative cavity of needs, does not need to seal immediately after the exhaust gas moreover, and convenient operation does benefit to the popularization. Alternatively, the sealing ring 3 of the present embodiment is circular and made of rubber material,

referring to fig. 3, fig. 3 is a schematic structural view of the latch cover 2 in fig. 1.

As shown in fig. 1 to 3, in some embodiments of the present invention, the clamping assembly includes a baffle 6, the baffle 6 is fixed on one side of the base 1 close to the clamping cover 2, and a first limiting flange 7 is provided on a side wall of the baffle 6; the clamping cover 2 is provided with a guide block 11, and the guide block 11 is provided with a second limit flange 8 matched with the first limit flange 7.

During the in-service use, after the exhaust is accomplished, press joint lid 2 towards base 1 one side, guide block 11 removes along baffle 6, makes second limit flange 8 and first limit flange 7 joint together, accomplishes fixing between base 1 and the joint lid 2, so makes joint lid 2 push down sealing washer 3, makes sealing washer 3 fixed, increases the leakproofness of first exhaust hole 4. Alternatively, the baffle 6 of the present embodiment is in a circular ring shape and is disposed around the outside of the first exhaust hole 4.

As shown in fig. 1 to 3, in some embodiments of the present invention, the baffle 6 is circular ring-shaped, and the first position-limiting flanges 7 are plural and spaced around the side wall of the baffle 6. The utility model arranges a plurality of first limit flanges 7 at intervals around the side wall of the baffle 6, and after the exhaust is finished, the guide block 11 is aligned to the space between two adjacent first limit flanges 7; press down joint lid 2 towards base 1 one side, make second limit flange 8 position and first limit flange 7's position correspond, then rotatory joint lid 2 makes second limit flange 8 and first limit flange 7 joint, accomplishes the fixed between base 1 and the joint lid 2. So the fixing base 1 and the clamping cover 2 are convenient to fix and the operation is convenient.

Optionally, the number of the first limit flanges 7 of this embodiment is three, and surround the even interval setting of 6 lateral walls of baffle, the guide block 11 number of this embodiment is also three, so when unable adjustment base 1 and joint lid 2, three guide block 11 corresponds the three space that forms between the three first limit flange 7 respectively, rotatory fixed back, the second limit flange 8 of each guide block 11 respectively rather than the first limit flange 7 joint that corresponds, three position joint back simultaneously, make base 1 and joint lid 2 fixed more stable. It should be noted that the shape of the baffle 6 in this example is a circular ring shape, which is a preferred embodiment, and in other embodiments, the baffle 6 may be rectangular, polygonal, or other shapes.

Referring to fig. 4 and 5, fig. 4 is a schematic view illustrating a structure of an exhaust-free valve according to another embodiment of the present invention; fig. 5 is a schematic structural view of the snap-in cover 2 in fig. 4.

As shown in fig. 4 and 5, in some embodiments of the present invention, the locking assembly includes a blocking plate 6, one end of the blocking plate 6 is fixed to one side of the base 1 close to the locking cover 2, and the other end of the blocking plate 6 is provided with a third limiting flange 9; the clamping cover 2 is provided with a guide plate 12, and the guide plate 12 is provided with a fourth limit flange 10 matched with the third limit flange 9.

During the in-service use, after the exhaust is accomplished, make deflector 12 aim at baffle 6, press joint lid 2 towards base 1 one side, deflector 12 removes along baffle 6, makes fourth limit flange 10 and third limit flange 9 joint together, accomplishes the fixing between base 1 and the joint lid 2, so makes joint lid 2 push down sealing washer 3, makes sealing washer 3 fixed, increases the leakproofness of first exhaust hole 4.

Optionally, the baffle 6 of this embodiment is in a circular ring shape and surrounds the first exhaust hole 4, and the third limiting flange 9 is disposed on the inner side wall of the baffle 6 far away from one end of the base 1. The deflector 12 of this embodiment is the internal diameter that is less than baffle 6 for the ring shape and deflector 12 external diameter, and fourth position limiting flange 10 encircles and locates the deflector 12 lateral wall.

Optionally, one end of the guide plate 12 away from the clamping cover 2 in this embodiment may be provided with a guide block 11, and the guide block 11 is provided with a second limiting flange 8; before the base 1 and the clamping cover 2 are fixed, the guide block 11 is arranged in the baffle 6, and the guide block 11 can slide along the baffle 6 so as to slide the clamping cover 2; at the moment, the third limiting flange 9 limits the second limiting flange 8, and the guide block 11 is prevented from moving out of the baffle 6; when the base 1 and the clamping cover 2 need to be fixed, the clamping cover 2 is directly pressed, the fourth limiting flange 10 and the third limiting flange 9 are clamped together, the base 1 and the clamping cover 2 are fixed, and therefore the process that the guide plate 12 aligns to the baffle 6 is omitted; and before unable adjustment base 1 and joint lid 2, base 1 and joint lid 2 are interconnect together, also can prevent that the user from placing joint lid 2 at will, have reduced the risk that joint lid 2 lost.

As shown in fig. 4 and 5, in some embodiments of the present invention, an annular first clamping plate 15 is disposed on one side of the base 1 close to the clamping cover 2, the first vent hole 4 is disposed in an annular region of the first clamping plate 15, and an inner diameter of the first clamping plate 15 is smaller than an outer diameter of the sealing ring 3; the clamping cover 2 is provided with an annular second clamping connection plate 16 matched with the first clamping connection plate 15, and the sealing ring 3 is arranged between the first clamping connection plate 15 and the second clamping connection plate 16.

By arranging the first clamping plate 15 and the second clamping plate 16, after the base 1 and the clamping cover 2 are fixed, the sealing ring 3 is arranged between the first clamping plate 15 and the second clamping plate 16, and the first clamping plate 15 and the second clamping plate 16 can clamp the sealing ring 3 arranged in the middle of the first clamping plate 15 and the second clamping plate 16; because the internal diameter of first joint board 15 is less than the external diameter of sealing washer 3, first exhaust hole 4 is located in first joint board 15 annular region, consequently can seal first exhaust hole 4 completely, further reduces the risk of first exhaust hole 4 gas leakage.

As shown in fig. 1 and fig. 3, in some embodiments of the present invention, the sealing ring 3 is provided with a limiting block 13, and the base 1 is provided with a limiting block hole 14 matched with the limiting block 13. The utility model discloses a sealing washer 3 sets up spacing fixture block 13, and base 1 is equipped with spacing fixture block 13 complex spacing card hole 14, and spacing card hole 14 is located to spacing fixture block 13, so be fixed in base 1 with sealing washer 3 on, thereby prevent among the exhaust process sealing washer 3 everywhere and remove influence sealing washer 3 sealed to first exhaust hole 4. Moreover, when the sealing ring 3 is installed, the clamping cover 2 is pressed, the sealing ring 3 is supported and moved by the clamping cover 2, the limiting clamping block 13 can serve as a guide, the limiting clamping block 13 is embedded into the limiting clamping hole 14, and the sealing ring 3 is convenient to install. But also be convenient for change sealing washer 3 after sealing washer 3 uses deformation or damage for a long time.

Optionally, the number of the first exhaust holes 4 of this embodiment is a plurality of and evenly surrounds the arrangement around the limiting clamping hole 14, the limiting clamping block 13 is arranged in the middle of the sealing ring 3, so that after the limiting clamping block 13 is embedded into the limiting clamping hole 14, the surrounding end of the sealing ring 3 is free and shields the first exhaust hole 4, the surrounding part of the sealing ring 3 is jacked up due to the impact of gas during exhaust, and then the gas is exhausted out of the exhaust-free valve. After exhausting, the pressure inside the cavity becomes lower, the external air pressure is higher than the air pressure inside the cavity, the peripheral part of the sealing ring 3 is pressed, the peripheral part of the sealing ring 3 shields the first exhaust hole 4, and the external air is prevented from entering the cavity in a reverse flow manner.

As shown in fig. 1 and 3, in some embodiments of the present invention, the outer diameter of the limiting latch 13 is larger than the inner diameter of the limiting latch hole 14. Because the exhaust in-process, when gaseous from first exhaust hole 4 comes out, the gas can form an outside thrust to sealing washer 3, if thrust too big can make sealing washer 3 pull spacing fixture block 13, make spacing fixture block 13 remove from spacing card hole 14, and then influence the sealing performance of sealing washer 3. The utility model discloses a set up the external diameter of spacing fixture block 13 and be greater than the internal diameter of spacing calorie of hole 14, be convenient for at spacing fixture block 13 back in embedding spacing calorie of hole 14, increase the extrusion force of spacing fixture block 13 lateral wall and spacing calorie of 14 internal surfaces in hole, make between spacing fixture block 13 and the spacing calorie of hole 14 fixed inseparabler, increase the stability of sealing washer 3 among the exhaust process. Optionally, the limiting latch 13 of this embodiment is made of a rubber material.

In some embodiments of the invention, as shown in fig. 1 and 3, the snap cap 2 is provided with a second venting hole 5. The utility model discloses a joint lid 2 sets up second exhaust hole 5, and in the exhaust process, gaseous exhaust hole 5 discharge exempts from the bleed valve from the second, increases gaseous emission efficiency, the gaseous emission of being convenient for.

As shown in fig. 2, in some embodiments of the present invention, a stop 17 for preventing impurities from entering into the first exhaust hole 4 is disposed on one side of the base 1 away from the clamping cover 2. Because articles such as cotton wool, clothes are softer, articles such as cotton wool, clothes are easy to be embedded into the first exhaust holes 4 in the exhaust process, so that the first exhaust holes 4 are blocked, and the exhaust of gas in the cavity is influenced. The utility model discloses a base 1 keeps away from one side of joint lid 2 and sets up dog 17, and dog 17 is located by first exhaust hole 4, and dog 17 is arranged in between article such as cotton fibre, clothes and first exhaust hole 4, plays the effect of isolation, prevents to cause first exhaust hole 4 to block up in the article such as cotton fibre, clothes imbed first exhaust hole 4 easily. Alternatively, the number of the stoppers 17 in this embodiment is six and the stoppers are evenly spaced around the circumference of the first exhaust hole 4.

The embodiment also provides a vacuum compression bag which comprises the air-extracting-free valve. Adopt this vacuum compression bag, easy operation, convenient and fast when accomodating the object.

To sum up, the embodiment of the utility model provides an air exhaust-free valve, which comprises a base 1 and a clamping cover 2 which are movably connected, and also comprises a clamping component which is used for fixing the base 1 and the clamping cover 2 together; base 1 is equipped with first exhaust hole 4, and first exhaust hole 4 is equipped with and is used for gas to cover 2 one side unilaterally flowing's sealing washer 3 from first exhaust hole 4 to the joint, and sealing washer 3 is located between base 1 and the joint lid 2.

During the in-service use, after adorning article in the cavity, press the cavity, make the gas in the carminative cavity of needs discharge from first exhaust hole 4, because sealing washer 3 makes gas from first exhaust hole 4 one-way flow, after exhaust gas, prevent that the external gas from returning to the internal of cavity against the current, consequently, exhaust gas need not seal immediately afterwards, after the exhaust is accomplished, fix base 1 and joint lid 2 together through the joint subassembly, make and locate sealing washer 3 between base 1 and the joint lid 2 fixed, increase the leakproofness of first exhaust hole 4, so place the in-process for a long time sealed more stable, prevent gas leakage. So the utility model provides an exempt from bleed valve does not need the air pump to bleed, utilizes the manual work to discharge from the pneumatic valve with the gas in the carminative cavity of needs, does not need to seal immediately after the exhaust gas moreover, and convenient operation does benefit to the popularization.

The embodiment of the utility model also provides a vacuum compression bag, including foretell gassing valve of exempting from. Adopt this vacuum compression bag, easy operation, convenient and fast when accomodating the object.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Exempt from to take out pneumatic valve, its characterized in that: the clamping device comprises a base and a clamping cover which are movably connected, and also comprises a clamping component which is used for fixing the base and the clamping cover together; the base is equipped with first exhaust hole, first exhaust hole is equipped with and is used for gaseous sealing washer to joint lid one side one-way flow from first exhaust hole, the sealing washer is located between base and the joint lid.

2. An air extraction free valve as claimed in claim 1 wherein: the clamping assembly comprises a baffle plate, the baffle plate is fixed on one side of the base, which is close to the clamping cover, and a first limiting flange is arranged on the side wall of the baffle plate; the joint lid is equipped with the guide block, the guide block is equipped with the second limit flange with first limit flange complex.

3. The vent-free valve of claim 2 wherein: the baffle shape is the ring shape, first spacing flange quantity is a plurality of and encircles baffle lateral wall interval setting.

4. An air extraction free valve as claimed in claim 1 wherein: the clamping assembly comprises a baffle, one end of the baffle is fixed on one side of the base close to the clamping cover, and the other end of the baffle is provided with a third limiting flange; the joint lid is equipped with the deflector, the deflector is equipped with the fourth limit flange with third limit flange complex.

5. An air extraction free valve as claimed in claim 1 wherein: an annular first clamping plate is arranged on one side, close to the clamping cover, of the base, the first exhaust hole is formed in the annular area of the first clamping plate, and the inner diameter of the first clamping plate is smaller than the outer diameter of the sealing ring; the joint lid is equipped with first joint board complex annular second joint board, the sealing washer is located between first joint board and the second joint board.

6. An extraction-free gas valve according to any one of claims 1 to 5, wherein: the sealing washer is equipped with spacing fixture block, the base is equipped with the spacing card hole with spacing fixture block complex.

7. The vent-free valve of claim 6 wherein: the outer diameter of the limiting clamping block is larger than the inner diameter of the limiting clamping hole.

8. An extraction-free gas valve according to any one of claims 1 to 5, wherein: the clamping cover is provided with a second exhaust hole.

9. An extraction-free gas valve according to any one of claims 1 to 5, wherein: one side of the base, which is far away from the clamping cover, is provided with a stop block for preventing sundries from entering the first exhaust hole.

10. Vacuum compression bag, its characterized in that: comprising an extraction-free valve according to any of claims 1-9.

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