CN114658634A

CN114658634A - Vacuum accessory

Info

Publication number: CN114658634A
Application number: CN202210338916.2A
Authority: CN
Inventors: 林刚直
Original assignee: Development Vacuum Equipment Sanmen Co ltd
Current assignee: Development Vacuum Equipment Sanmen Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-06-24
Anticipated expiration: 2042-04-01
Also published as: CN114658634B

Abstract

The utility model relates to a vacuum accessory, including the casing that has the cavity and the filter mantle of setting in the cavity, set up air inlet and the gas outlet with external intercommunication on the cavity inner wall respectively, the filter mantle is used for filtering the air through the gas outlet, the casing includes the lid and has the body of cavity, the lid can be dismantled and connect on the body top and be used for sealing the cavity, the air inlet is seted up on the lateral wall of cavity, the gas outlet is seted up on the diapire of cavity, the filter mantle can be dismantled and connect on the cavity diapire, including the filter mantle covers the gas outlet cage, when the lid is opened, the filter mantle can follow the body top and shift out. After the vacuum accessory is used for a period of time, an operator can replace the filter cover in the vacuum accessory, and compared with the replacement of the whole vacuum accessory, the replacement of the filter cover alone can reduce the replacement cost.

Description

Vacuum accessory

Technical Field

The present application relates to the field of vacuum pump accessories, and more particularly, to a vacuum attachment.

Background

The vacuum accessory is usually a vacuum filter, and the vacuum filter is a protection device specially designed for preventing internal components and precise structures of the vacuum pump from being damaged by liquid, liquid aerosol viscous substances or tiny dust.

As shown in fig. 1, the related art vacuum accessory includes a housing 1 and a filter housing 2 fixed in the housing 1, the housing 1 is respectively provided with an air inlet 122 and an air outlet 123 communicated with the outside, the air outlet 123 is used for externally connecting a vacuum pump, air enters from the air inlet 122 of the housing 1, is filtered by the filter housing 2, and then flows from the air outlet 123 to the vacuum pump.

After the vacuum accessory is used for a period of time, impurities which are filtered out by continuous adhesion on the filter cover can be reduced, the filtering effect of the filter cover can be deteriorated, and an operator needs to regularly replace the vacuum accessory.

The above-mentioned related technical solutions have the following drawbacks: the vacuum attachment described above needs to be replaced in its entirety, resulting in a high replacement cost.

Disclosure of Invention

To reduce the replacement cost of a vacuum attachment, the present application provides a vacuum attachment.

The application provides a vacuum accessory adopts following technical scheme:

the utility model provides a vacuum accessory, is including the casing that has the cavity and the filter mantle of setting in the cavity, set up air inlet and the gas outlet with external intercommunication on the cavity inner wall respectively, the air inlet is used for supplying the air admission cavity, the gas outlet is used for external vacuum pump, the filter mantle is used for filtering the air through the gas outlet, the casing includes the lid and has the body of cavity, the lid can be dismantled and connect on the body top and be used for sealing the cavity, the air inlet is seted up on the lateral wall of cavity, the gas outlet is seted up on the diapire of cavity, the filter mantle can be dismantled and connect on the diapire in the cavity, including the filter mantle covers the gas outlet, when the lid is opened, the filter mantle can follow the body top and shift out.

Through adopting above-mentioned technical scheme, after the vacuum attachment used a period, the filter effect of filter mantle can the worsen, operating personnel need change the filter mantle in the vacuum attachment, in the change process, operating personnel opened the lid earlier, then dismantle the filter mantle from the cavity diapire, shift out the filter mantle from the body top again, then install new filter mantle on the cavity diapire, cover the lid again, can accomplish the change of filter mantle, compare in changing whole vacuum attachment, it can reduce the replacement cost to change the filter mantle alone.

Preferably, a rotating disc is rotatably connected to the inner bottom wall of the cavity, the axis direction of the rotating disc is parallel to the axis direction of the body, the filter cover is detachably connected to the rotating disc, the filter cover and the rotating disc are coaxially arranged, blades are uniformly fixed to the outer wall of the filter cover along the circumferential direction, the air inlet is obliquely arranged towards the blades, and when air enters the air inlet, the air drives the blades to rotate and drives the filter cover to rotate.

Through adopting above-mentioned technical scheme, suppose filter mantle fixed mounting on the cavity diapire, because the air inlet is located the body lateral wall, then the air inlet gets into that the gas in the cavity can blow to the filter mantle just to the department of air inlet earlier, thereby lead to the filter mantle just to the position of air inlet different with the volume of other positions filtered air of filter mantle, lead to the filter mantle just to the filter effect of air inlet position can be with higher speed the variation, thereby increase the change frequency of filter mantle, it drives the blade rotation and drives the filter mantle to rotate now to admit air through the air inlet, each position homoenergetic that can make filter mantle circumference all can play considerable filtering action, thereby improve the live time of filter mantle.

Preferably, still include first spring, there is the expansion disc along the axis direction sliding connection who is on a parallel with the carousel all the time on the carousel, expansion disc and carousel are connected respectively at the both ends of first spring, first spring is compression state and drive expansion disc all the time and removes towards lid one side, the connection can be dismantled on the expansion disc to the filter mantle, rotate on the lid and be connected with the bull stick, when the lid is installed on the body, the bull stick is with the coaxial setting of carousel, the bull stick is used for the butt on the filter mantle top surface and follows the synchronous rotation of filter mantle, when the lid is opened, the body is stretched out on the filter mantle top.

Through adopting above-mentioned technical scheme, when opening the lid, the activity dish is automatic under the effect of first spring promotes the filter mantle and stretches out the body, thereby can make things convenient for operating personnel to take to hold between the fingers the filter mantle and dismantle the filter mantle.

Preferably, set up the annular with filter mantle bottom matching on the activity dish top surface, the annular diapire is fixed with the magnet, be fixed with the magnetism ring that can be adsorbed by the magnet on the filter mantle diapire, when the magnet adsorbs the magnetism ring, the filter mantle bottom imbeds in the annular completely.

Through adopting above-mentioned technical scheme, adsorb the magnetism ring through the magnet, can make things convenient for the dismantlement of filter mantle on the activity dish.

Preferably, the top end of the rotating rod extends out of the cover body and is fixed with the indicating blade, a transparent cover is arranged on the top surface of the cover body, and the indicating blade is surrounded by the transparent cover.

Through adopting above-mentioned technical scheme, after vacuum accessory used a period, impurity in the air can the adhesion plug up the filter mantle on the filter mantle, the gas throughput rate of filter mantle can descend this moment, the gas outlet links to each other with the vacuum pump, can lead to the vacuum pump unable normal bleeding, because the gas outlet passes through gaseous volume balance with the air inlet through gaseous volume, so the gas volume that gas outlet and air inlet pass through can reduce in step, the air current that can lead to the air inlet to get into the cavity is difficult to blow the blade and drives the filter mantle and rotate, the air current filtration capacity of filter mantle can be inferred through observing the rotation state of instructing the blade, thereby make things convenient for operating personnel in time to change the filter mantle.

Preferably, still include the driving piece, the groove of keeping in has been seted up on the gas outlet inner wall, there is the temporary filter block along the direction of depth sliding connection in the groove of keeping in the inslot of keeping in, the temporary filter block of driving piece drive slides on the groove of keeping in, the one end of temporary filter block towards the gas outlet is fixed with sealed piece, and when the temporary filter block was located the inslot of keeping in, sealed piece was located the one end that the groove of keeping in was close to the gas outlet and will keep in the groove and seal, when the sealed piece removed to the butt on the gas outlet inner wall, the temporary filter block was located gas outlet department and was used for filtering the gas through the gas outlet.

Through adopting above-mentioned technical scheme, when changing the filter mantle, use the temporary filter block of driving piece drive to remove to gas outlet department, the temporary filter block can play interim filtering action to the gas through the gas outlet, and the vacuum pump can operate always, does not worry that the impurity in the air is unfiltered and gets into the vacuum pump.

Preferably, the driving piece includes rack, gear, lead screw and second spring, be fixed with the dead lever on the lid, the lead screw rotates to be connected in this body, the axis direction of lead screw is on a parallel with the slip direction of temporary filter block, threaded connection wears to establish and on temporary filter block is threaded connection, the coaxial fixed connection of gear is on the lead screw, perpendicular groove has been seted up on the body top surface, the rack is along the degree of depth direction sliding connection who erects the groove on erecting the groove, rack toothing connects on the gear, the second spring sets up on the rack and drives the rack and remove towards lid one side all the time, the dead lever is used for stretching into and erects the inslot and drives the elasticity that the second spring was overcome to the rack and remove, when the lid was installed on the body, temporary filter block removes to gas outlet department, when the lid was opened, temporary filter block removes to temporary inslot.

By adopting the technical scheme, when the cover body is opened, the cover body moves towards one side far away from the body, the second spring drives the rack to move towards one side of the cover body, so that the driving gear rotates to drive the lead screw to rotate, and the lead screw drives the temporary filter block to move into the temporary storage groove, so that the temporary filtering effect on the gas passing through the gas outlet is achieved; after the filter mantle is changed, the cover body is arranged in the body, the fixed rod overcomes the elasticity of the second spring to drive the rack to move towards one side of the second spring, so that the lead screw is driven to rotate reversely, and the temporary filter block moves back to the temporary storage tank.

Preferably, be equipped with the stopper on the rack, erect the groove lateral wall and seted up the spacing groove, the stopper is along the slip direction sliding connection who is on a parallel with the rack at the spacing inslot, the rack towards the one end of lid seted up with dead lever bottom interference fit's caulking groove, when the lid was installed on the body, dead lever bottom embedding caulking groove.

Through adopting above-mentioned technical scheme, when the lid was opened, the dead lever on the lid can drive the rack and move one end distance towards keeping away from second spring one side, and the rack need not rely on the elasticity of second spring completely to drive, especially runs into the condition that the second spring blocks, can help the second spring to resume normal condition.

In summary, the present application includes at least one of the following beneficial technical effects:

by detachably connecting the filter cover in the cavity, compared with the replacement of the whole vacuum accessory, the replacement cost can be reduced by replacing the filter cover independently;

through setting up the blade on carousel and the filter mantle, admit air through the air inlet and drive the blade and rotate and drive the filter mantle and rotate, can make each position homoenergetic of filter mantle circumference can play corresponding filtering action to improve the live time of filter mantle.

Drawings

Fig. 1 is an overall structural diagram of the related art.

Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 3 is a sectional view taken along line a-a of fig. 1.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a sectional view taken along line C-C in fig. 2.

Description of reference numerals: 1. a housing; 11. a cover body; 111. a bolt; 112. fixing the rod; 113. a rotating rod; 12. a body; 121. a cavity; 122. an air inlet; 123. an air outlet; 13. a transparent cover; 131. a handle; 14. a turntable; 141. a limiting groove; 142. a first groove; 143. a chute; 144. a through hole; 15. a movable tray; 151. a limiting block; 152. a ring groove; 153. a magnet; 16. a first spring; 17. a temporary storage tank; 171. a second groove; 18. temporarily filtering the block; 181. a sealing block; 182. a first block; 19. a vertical slot; 191. a limiting groove; 2. a filter housing; 21. a blade; 22. a magnetic ring; 23. a center block; 231. a central slot; 3. a drive member; 31. a rack; 311. a limiting block; 312. caulking grooves; 32. a gear; 33. a lead screw; 34. a second spring.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses a vacuum accessory.

Referring to fig. 2 and 3, a vacuum attachment housing 1 and filter cage 2 of the present embodiment. The shell 1 comprises a body 12 and a cover body 11 detachably connected to the top end of the body 12, a cavity 121 is formed in the top surface of the body 12, the cross section of the cavity 121 is in a circular arrangement, and the axis direction of the cross section of the cavity 121 is coaxial with the body 12 and the cover body 11 and is in a vertical arrangement. When the cover 11 is mounted on the body 12, the cover 11 seals the cavity 121. The side wall of the cavity 121 is provided with an air inlet 122, the air inlet 122 is used for allowing air to enter the cavity 121, the center of the bottom wall of the cavity 121 is provided with an air outlet 123, and the air outlet 123 is used for being externally connected with a vacuum pump. The filter housing 2 is detachably connected to the bottom wall of the cavity 121, the projection of the filter housing 2 on the bottom wall of the cavity 121 completely covers the air outlet 123, and when the cover 11 is opened, the filter housing 2 can be removed from the top end of the body 12.

Referring to fig. 3 and 4, the inner bottom wall of the cavity 121 is rotatably connected with a rotating disc 14, the rotating disc 14 is rotatably arranged on the axis and coaxially with the body 12, a sliding groove 143 is formed in the top surface of the rotating disc 14 along the vertical direction, a movable disc 15 is slidably connected to the sliding groove 143 along the vertical direction, limiting blocks 151 are respectively fixed to two sides of the outer wall of the movable disc 15, a limiting groove 141 is formed in the upper side wall of the sliding groove 143, the limiting blocks 151 are slidably connected to the limiting groove 141 along the vertical direction, two first grooves 142 are formed in the bottom wall of the sliding groove 143, and the two first grooves 142 are respectively located under the two limiting blocks 151. The first groove 142 is provided with a first spring 16 therein, and the upper and lower ends of the first spring 16 are fixed to the bottom surface of the corresponding limiting block 151 and the bottom wall of the first groove 142, respectively. The first spring 16 is always in a compressed state.

Referring to fig. 3 and 4, the filter housing 2 is detachably connected to the movable disc 15, the top surface of the movable disc 15 is provided with an annular groove 152 matched with the bottom end of the filter housing 2, the bottom wall of the filter housing 2 is fixed with a magnetic ring 22 capable of being adsorbed by a magnet 153, when the magnet 153 adsorbs the magnetic ring 22, the bottom end of the filter housing 2 is completely embedded into the annular groove 152, the filter housing 2 and the turntable 14 are coaxially arranged, and the turntable 14 and the movable disc are provided with through holes 144 which do not shield the air outlet 123. The gas entering the cavity 121 from the gas inlet 122 is filtered by the filter housing 2 and then enters the gas outlet 123 through the through hole 144.

Referring to fig. 3 and 4, when the cover 11 is opened, that is, when the cover 11 is far away from the body 12, the top end of the filter housing 2 extends out of the body 12 under the action of the first spring 16, so that an operator can conveniently take and install the filter housing 2.

Referring to fig. 3, the cover 11 is coaxially and rotatably connected with a rotating rod 113, two ends of the rotating rod 113 are respectively located at the upper side and the lower side of the cover 11, the bottom end of the rotating rod 113 is arranged in a tapered shape from top to bottom, a center block 23 is fixed at the center of the top surface of the filter housing 2, a center groove 231 in interference fit with the bottom end of the rotating rod 113 is formed in the center block 23, when the cover 11 is installed on the body 12, the bottom end of the rotating rod 113 sinks into the center groove 231, the rotating rod 113 and the filter housing 2 are coaxially arranged, the rotating rod 113 presses the filter housing 2 onto the movable disc 15, the air tightness of the bottom end of the filter housing 2 is increased, and meanwhile, the rotating rod 113 rotates along with the filter housing 2 synchronously.

Referring to fig. 3, the blades 21 are uniformly fixed on the outer wall of the filter housing 2 along the circumferential direction, the air inlet 122 is inclined toward the blades 21, and when the air inlet 122 admits air, the air flow drives the blades 21 to rotate and drives the filter housing 2 to rotate. The indicating blade 21 is fixed on the top end of the rotating rod 113 extending out of the cover body 11, the transparent cover 13 is fixed on the center of the top surface of the cover body 11, the indicating blade 21 is enclosed by the transparent cover 13, and the indicating blade 21 is prevented from being blown by external wind. A handle 131 for applying a force to the hand is fixed to the top surface of the cover 11.

Referring to fig. 3, after the vacuum accessory is used for a period of time, impurities in the air can adhere to the filter housing 2 to block the filter housing 2, at the moment, the gas passing rate of the filter housing 2 can be reduced, the gas outlet 123 is connected with the vacuum pump, the vacuum pump can be prevented from pumping air normally, the gas outlet 123 is balanced with the gas inlet 122 in the gas passing amount, the gas passing amount of the gas outlet 123 and the gas inlet 122 can be reduced synchronously, the gas flow which can cause the gas inlet 122 to enter the cavity 121 is difficult to blow the blades 21 to drive the filter housing 2 to rotate, the gas flow filtering amount of the filter housing 2 can be inferred by observing the rotating state of the indicating blades 21, and therefore operators can replace the filter housing 2 in time.

Referring to fig. 3 and 4, a temporary storage groove 17 is formed in the inner wall of the air outlet 123, the depth direction of the temporary storage groove 17 is perpendicular to the axis direction of the body 12, a temporary filter block 18 is connected to the temporary storage groove 17 in a sliding manner along the depth direction of the temporary storage groove 17, a driving part 3 is arranged in the body 12, the driving part 3 drives the temporary filter block 18 to slide on the temporary storage groove 17, a sealing block 181 is fixed at one end of the temporary filter block 18 facing the air outlet 123, when the temporary filter block 18 is completely located in the temporary storage groove 17, the sealing block 181 is located at one end of the temporary storage groove 17 close to the air outlet 123 and seals the temporary storage groove 17, and gas passing through the air outlet 123 cannot contact with the temporary filter block 18. When the sealing block 181 moves away from the temporary storage tank 17 to abut against the inner wall of the gas outlet 123, the temporary filtering block 18 blocks the gas outlet 123 and is used for filtering the gas passing through the gas outlet 123.

Referring to fig. 4 and 5, the driving member 3 includes a rack 31, a gear 32, a lead screw 33 and a second spring 34, a second groove 171 is opened on the bottom surface of the temporary storage groove 17, the length direction of the second groove 171 is parallel to the depth direction of the temporary storage groove 17, a first block 182 is fixed on the bottom surface of the temporary filter block 18, the first block 182 is slidably connected in the second groove 171 along the length direction parallel to the second groove 171, the lead screw 33 is rotatably connected in the second groove 171, and the axial direction of the lead screw 33 is parallel to the moving direction of the temporary filter block 18. The screw 33 is threaded and screwed on the first block 182, one end of the screw 33 extends out of the second groove 171 and is fixed with the gear 32, and the gear 32 can rotate in the body 12. Vertical groove 19 has been seted up along vertical direction on the body 12 top surface, and rack 31 is along vertical direction sliding connection in vertical groove 19, and rack 31 meshes the connection on gear 32, and second spring 34 is located vertical groove 19 and is located rack 31 under, and the both ends of second spring 34 butt respectively on rack 31 bottom surface and vertical groove 19 diapire, and second spring 34 is compression state all the time.

Referring to fig. 4 and 5, a limiting block 311 is fixed on the side wall of the rack 31, a limiting groove 191 is formed in the side wall of the vertical groove 19 along the vertical direction, the limiting block 311 is slidably connected in the limiting groove 191 along the vertical direction, when no external force acts on the rack 31, the rack 31 moves upwards under the elastic force of the second spring 34 until the limiting block 311 abuts against the top wall of the limiting groove 191, and at this time, the temporary filter block 18 moves towards the side of the air outlet 123 until the sealing block 181 abuts against the inner wall of the air outlet 123.

Referring to fig. 4 and 5, two fixing rods 112 are vertically fixed on the bottom surface of the cover 11, the two fixing rods 112 are respectively located at two ends of the cover 11, there are two vertical slots 19, the two fixing rods 112 respectively correspond to the two vertical slots 19, and the rack 31 is slidably connected in one of the vertical slots 19. Two fixing rods 112 are slidably connected in the two vertical slots 19 in the vertical direction, respectively, wherein one of the fixing rods 112 is used for extending into the vertical slot 19 and driving the rack 31 to move downwards against the elastic force of the second spring 34. When the bottom surface of the cover 11 is attached to the top surface of the main body 12, the temporary filter block 18 is completely moved into the temporary storage tank 17, and the gas passing through the gas outlet 123 is not filtered.

Referring to fig. 2 and 5, two bolts 111 are provided on the cover 11, and one end of the bolt 111 passes through the cover 11 and is screwed to the body 12. The lid 11 is fixedly mounted on the body 12 by tightening the bolts 111.

Referring to fig. 4 and 5, an end of the rack 31 facing the cover 11 is provided with an insertion groove 312 in interference fit with a bottom end of the fixing rod 112, and when the cover 11 is mounted on the body 12, the bottom end of the fixing rod 112 is inserted into the insertion groove 312. When the cover 11 is opened, the fixing rod 112 on the cover 11 drives the rack 31 to move a distance towards the side away from the second spring 34, and the rack 31 is not driven by the elasticity of the second spring 34, and especially meets the situation that the second spring 34 is clamped, so that the second spring 34 can be helped to return to the normal state.

The implementation principle of the vacuum accessory in the embodiment of the application is as follows: after the vacuum attachment uses a period, the filter effect of filter mantle 2 can worsen, operating personnel need change filter mantle 2 in the vacuum attachment, in the change process, operating personnel opens lid 11 earlier, then dismantle filter mantle 2 from cavity 121 diapire, shift out filter mantle 2 from body 12 top again, then install new filter mantle 2 on cavity 121 diapire, cover lid 11 again, can accomplish the change of filter mantle 2, compare in changing whole vacuum attachment, it can reduce the replacement cost to change filter mantle 2 alone.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a vacuum accessory, includes casing (1) that has cavity (121) and sets up filter mantle (2) in cavity (121), set up air inlet (122) and gas outlet (123) with external intercommunication on the cavity (121) inner wall respectively, air inlet (122) are used for supplying air to get into cavity (121), gas outlet (123) are used for external vacuum pump, filter mantle (2) are used for filtering the air through gas outlet (123), its characterized in that: casing (1) is including lid (11) and body (12) that have cavity (121), lid (11) can be dismantled and connect and be used for sealing up cavity (121) on body (12) top, air inlet (122) are seted up on the lateral wall of cavity (121), gas outlet (123) are seted up on the diapire of cavity (121), filter mantle (2) can be dismantled and connect on diapire in cavity (121), including filter mantle (2) cover gas outlet (123), when lid (11) are opened, filter mantle (2) can be followed body (12) top and removed.

2. A vacuum attachment as claimed in claim 1, wherein: the inner bottom wall of the cavity (121) is rotatably connected with a rotating disc (14), the axis direction of the rotating disc (14) is parallel to the axis direction of the body (12), the filter cover (2) is detachably connected to the rotating disc (14), the filter cover (2) and the rotating disc (14) are coaxially arranged, blades (21) are uniformly fixed on the outer wall of the filter cover (2) along the circumferential direction, the air inlet (122) is obliquely arranged towards the blades (21), and when air enters the air inlet (122), the air drives the blades (21) to rotate and drives the filter cover (2) to rotate.

3. A vacuum attachment as claimed in claim 2, wherein: still include first spring (16), there are activity dish (15) all the time along the axis direction sliding connection who is on a parallel with carousel (14) on carousel (14), activity dish (15) and carousel (14) are connected respectively at the both ends of first spring (16), first spring (16) are compression state and drive activity dish (15) all the time and move towards lid (11) one side all the time, connection can be dismantled on activity dish (15) in filter mantle (2), it is connected with bull stick (113) to rotate on lid (11), when lid (11) are installed on body (12), bull stick (113) and carousel (14) coaxial setting, bull stick (113) are used for the butt on filter mantle (2) top surface and follow filter mantle (2) synchronous rotation, when lid (11) are opened, body (12) are stretched out on filter mantle (2) top.

4. A vacuum attachment as claimed in claim 3, wherein: offer annular (152) with filter mantle (2) bottom matching on activity dish (15) top surface, annular (152) diapire is fixed with magnet (153), be fixed with on filter mantle (2) diapire can be by magnet (153) adsorbed magnetic ring (22), when magnet (153) adsorb magnetic ring (22), filter mantle (2) bottom imbeds in annular (152) completely.

5. A vacuum attachment as claimed in claim 3, wherein: the top end of the rotating rod (113) extends out of the cover body (11) and is fixed with the indicating blade (21), the top surface of the cover body (11) is provided with a transparent cover (13), and the transparent cover (13) surrounds the indicating blade (21).

6. A vacuum attachment as claimed in claim 1, wherein: still include driving piece (3), temporary storage groove (17) have been seted up on gas outlet (123) inner wall, there is temporary filter block (18) along the direction of depth sliding connection of temporary storage groove (17) in temporary storage groove (17), driving piece (3) drive temporary filter block (18) slide on temporary storage groove (17), temporary filter block (18) are fixed with sealing block (181) towards the one end of gas outlet (123), and when temporary filter block (18) were located temporary storage groove (17), sealing block (181) were located temporary storage groove (17) and were close to the one end of gas outlet (123) and will be kept in groove (17) and seal, when sealing block (181) moved to the butt on gas outlet (123) inner wall, temporary filter block (18) were located gas outlet (123) department and were used for filtering the gas through gas outlet (123).

7. A vacuum attachment as claimed in claim 6, wherein: driving piece (3) are including rack (31), gear (32), lead screw (33) and second spring (34), be fixed with dead lever (112) on lid (11), lead screw (33) rotate to be connected in body (12), the axis direction of lead screw (33) is on a parallel with the slip direction of temporary filter block (18), lead screw (33) are worn to establish and threaded connection on temporary filter block (18), coaxial fixed connection of gear (32) is on lead screw (33), perpendicular groove (19) have been seted up on body (12) top surface, rack (31) are along the degree of depth direction sliding connection of perpendicular groove (19) on perpendicular groove (19), rack (31) meshing connection is on gear (32), second spring (34) set up on rack (31) and drive rack (31) and move towards lid (11) one side all the time, dead lever (112) are used for stretching into in perpendicular groove (19) and drive rack (31) overcome the bullet of second spring (34), and dead lever (112) are used for stretching into The force is moved, when the cover body (11) is installed on the body (12), the temporary filtering block (18) moves to the air outlet (123), and when the cover body (11) is opened, the temporary filtering block (18) moves into the temporary storage tank (17).

8. A vacuum attachment as claimed in claim 7, wherein: be equipped with stopper (311) on rack (31), spacing groove (191) have been seted up to perpendicular groove (19) lateral wall, stopper (311) are along the slip direction sliding connection who is on a parallel with rack (31) in spacing groove (191), rack (31) are seted up towards the one end of lid (11) and are had caulking groove (312) with dead lever (112) bottom interference fit, when lid (11) were installed on body (12), dead lever (112) bottom embedding caulking groove (312).