CN114645836A

CN114645836A - Vacuum pumping device

Info

Publication number: CN114645836A
Application number: CN202011495782.2A
Authority: CN
Inventors: 黎少情; 朱建峰
Original assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Current assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-06-21
Anticipated expiration: 2040-12-17
Also published as: CN114645836B

Abstract

The invention relates to a vacuum-pumping device. The vacuum-pumping device comprises: the vacuumizing assembly comprises a connecting pipe and a mounting seat movably connected with the connecting pipe, and a vacuumizing channel is formed inside the connecting pipe; the quick-change assembly is detachably mounted on the mounting seat and comprises a quick-change head and a sealing piece, the sealing piece is accommodated in the quick-change head, and a guide-in channel is formed in the sealing piece and the quick-change head in a communicating manner; the quick-change head is provided with a locking state locked on the mounting seat and an unlocking state moving relative to the mounting seat; the connecting pipe can move relative to the mounting seat to press the sealing piece onto the quick-change head in a locking state, so that the vacuumizing channel is communicated with the introducing channel, and the quick-change assembly is pushed away from the mounting seat in an unlocking state. Above-mentioned evacuating device need not to dismantle evacuating device just can realize the change of sealing washer, and not only easy operation is changed efficiently moreover, and is consuming time shorter.

Description

Vacuum-pumping device

Technical Field

The invention relates to the technical field of vacuumizing equipment, in particular to a vacuumizing device.

Background

At present, when a product is vacuumized, a sealing ring and a pressing piece are arranged in the vacuumizing device, the sealing ring is extruded through the pressing piece, the sealing ring seals between the pressing piece and an air suction opening of the product, and therefore an air suction channel with good air tightness is formed between the pressing piece and the product. However, since the seal ring is repeatedly pressed and easily damaged, the seal ring needs to be replaced periodically. The prior operation mode is to manually disassemble the vacuumizing device and manually replace the sealing ring, so that the operation mode is time-consuming and labor-consuming, and the operation efficiency is lower.

Disclosure of Invention

Therefore, it is necessary to provide a vacuum pumping apparatus with a simple seal ring replacement operation and high replacement efficiency.

An evacuation device comprising:

the vacuumizing assembly comprises a connecting pipe and a mounting seat movably connected with the connecting pipe, and a vacuumizing channel is formed in the connecting pipe;

the quick-change assembly is detachably mounted on the mounting seat and comprises a quick-change head and a sealing piece, the sealing piece is accommodated in the quick-change head, and a guide-in channel is formed in the sealing piece and the quick-change head in a communication manner; the quick-change head is provided with a locking state locked on the mounting seat and an unlocking state movable relative to the mounting seat;

the connecting pipe can move relative to the mounting seat so as to press the sealing piece on the quick-change head in the locking state, enable the vacuumizing channel to be communicated with the introducing channel and push the quick-change assembly away from the mounting seat in the unlocking state.

In the vacuum pumping device, after the quick-change head is arranged on the mounting seat, the quick-change head and the mounting seat are locked, the connecting pipe can be abutted against the sealing element along with the movement of the connecting pipe relative to the mounting seat, and the sealing element is pressed on the quick-change head, so that the sealing element and the connecting pipe are in close contact with each other, the sealing element and the quick-change head are communicated with each other, and the vacuum pumping channel is communicated with the guide-in channel and has better sealing property. When the sealing element needs to be replaced, the quick-change head and the mounting seat are unlocked, the sealing element is continuously pushed by the connecting pipe, and the sealing element and the quick-change head can be synchronously pushed away from the mounting seat. So, only need carry out automated control to the relative motion of connecting pipe and mount pad, the locking and the unblock of quick change seat, can realize evacuating device's automation and change the sealing member, need not to dismantle evacuating device, easy operation not only changes efficiency higher moreover, and is consuming time shorter.

In one embodiment, the mounting seat is provided with a mounting hole in a penetrating manner, and the quick-change assembly is mounted in the mounting hole; the vacuumizing device comprises a locking assembly, and the locking assembly can automatically lock the quick-change head in the mounting hole.

In one embodiment, a through hole communicated with the mounting hole is formed in the side wall of the mounting seat; locking subassembly rigid coupling in on the mount pad, locking subassembly include first driving piece and with the clamping jaw that first driving piece is connected, first driving piece can drive the clamping jaw stretches into the through hole is in order to hold tightly the quick-change head, perhaps drive the clamping jaw is followed the through hole withdraws from in order to release the quick-change head.

In one embodiment, the mounting seat is provided with an adjusting hole, the axial direction of the adjusting hole is parallel to the axial direction of the mounting hole, and the adjusting hole is communicated with the through hole; the locking assembly comprises a spring plunger, the spring plunger is in threaded connection with the adjusting hole and can extend into the through hole, so that the locking assembly is clamped with the clamping jaw in a locking state.

In one embodiment, a flange is formed on an outer wall surface of the quick-change head, and in the locked state, the flange can abut against the locking assembly in the axial direction of the mounting hole.

In one embodiment, the flange is in clearance fit with the inner wall surface of the mounting seat; and/or the flange extends along the circumferential direction of the quick-change head to form a ring shape, and a conical surface gradually contracting along the direction towards the connecting pipe is formed on the flange.

In one embodiment, a receiving groove is formed in the quick-change head, the sealing element is received in the receiving groove, and the sealing element can be pressed against the bottom wall of the receiving groove under the action of the connecting pipe; the bottom wall of the containing groove is provided with a first through hole in a penetrating mode, the sealing element is provided with a second through hole, and the first through hole is communicated with the second through hole to form the leading-in channel together.

In one embodiment, the first via hole is tapered and gradually shrinks along a direction approaching the accommodating groove.

In one embodiment, the second via hole includes a straight pipe section and a conical pipe section, the small-mouth end of the conical pipe section is connected with the straight pipe section, the large-mouth end of the conical pipe section is opposite to the first via hole, and the caliber of the end of the first via hole close to the sealing element is smaller than that of the large-mouth end of the conical pipe section.

In one embodiment, the vacuum pumping assembly comprises a second driving member, and the second driving member is connected with the mounting seat to drive the mounting seat to move relative to the connecting pipe.

Drawings

FIG. 1 is a schematic structural diagram of a vacuum-pumping device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the evacuation device shown in FIG. 1;

FIG. 3 is an exploded view of the mounting block and locking assembly of the vacuum extractor of FIG. 1;

fig. 4 is an exploded view of the mounting block and the quick-change assembly of the vacuum apparatus shown in fig. 2.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used 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 "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, an evacuation device 10 according to an embodiment of the present invention is used for evacuating a product. For example, in the case of a hollow ultra-thin heat sink in an electronic product such as a notebook computer, a mobile phone, etc., the intermediate state 20 is composed of a main body 21 and a needle tube 22 connected to the main body 21 during the manufacturing process, and in the subsequent processing, the needle tube 22 is cut off, and the remaining main body 21 is the final product. In the vacuum-pumping operation, the vacuum-pumping device 10 is connected to the needle tube 22, thereby performing vacuum-pumping on the main body 21.

In the present embodiment, the vacuum pumping device 10 comprises the vacuum pumping assembly 30 and the quick-change assembly 90. The vacuum pumping assembly 30 includes a connecting tube 300 and a mounting base 400 movably connected to the connecting tube 300, and a vacuum pumping channel 310 is formed inside the connecting tube 300. The quick-change assembly 90 is detachably mounted on the mounting seat 400. The quick-change assembly 90 includes a quick-change head 910 and a sealing member 930, the sealing member 930 is housed inside the quick-change head 910, and an introduction passage 950 is formed in the sealing member 930 and the quick-change head 910 in communication. The quick-change head 910 has a locked state locked to the mount 400 and an unlocked state movable relative to the mount 400. The coupling tube 300 is movable relative to the mount 400 to compress the seal 930 against the quick-change head 910 in the locked state, to place the evacuation channel 310 in communication with the lead-in channel 950, and to push the quick-change assembly 90 away from the mount 400 in the unlocked state.

In use, needle cannula 22 is inserted into introduction channel 950 and extends into sealing member 930, and sealing member 930 is capable of holding needle cannula 22 due to its elasticity, so that evacuation channel 310 communicates with the interior of the product to evacuate the product.

In the vacuum extractor 10, after the quick-change head 910 is mounted on the mounting base 400, the quick-change head 910 and the mounting base 400 are locked, and the connecting tube 300 can be abutted against the sealing member 930 and the sealing member 930 can be pressed against the quick-change head 910 along with the movement of the connecting tube 300 relative to the mounting base 400, so that the sealing member 930 and the connecting tube 300 and the sealing member 930 and the quick-change head 910 are in close contact, and the vacuum extraction channel 310 and the introduction channel 950 are communicated and have good sealing performance. When the sealing member 930 needs to be replaced, the quick-change head 910 is unlocked from the mounting seat 400, and the sealing member 930 and the quick-change head 910 can be synchronously pushed away from the mounting seat 400 by making the connecting pipe 300 continuously push the sealing member 930. Thus, only by automatically controlling the relative movement between the connecting pipe 300 and the mounting seat 400 and the locking and unlocking of the quick-change seat, the sealing element 930 of the vacuum extractor 10 can be automatically replaced without disassembling the vacuum extractor 10, so that the operation is simple, the replacement efficiency is high, and the time consumption is short.

It should be noted that the quick-change head 910 is attached to the mounting base 400 or removed together with the sealing member 930 as a mating structure. For the quick-change assembly 90 removed from the mounting seat 400, a certain number of seals 930 can be manually replaced inside the quick-change head 910, so that the quick-change head 910 can be used continuously, thereby reducing the production cost.

Referring to fig. 2 to 3, in this embodiment, a mounting hole 410 is formed through the mounting seat 400, and the quick-change assembly 90 is mounted in the mounting hole 410. The evacuation device 10 includes a locking assembly 50, the locking assembly 50 being capable of automatically locking the quick-change head 910 within the mounting aperture 410. By abutting the connection pipe 300 and the sealing member 930 inside the mounting hole 410, a relatively closed environment can be provided, and the connection sealing performance among the connection pipe 300, the sealing member 930, and the quick connector can be improved.

Specifically, the mounting hole 410 is stepped, the quick-change head 910 can be guided into the mounting hole 410 from the end with the larger diameter of the mounting hole 410 and abut against the step in the mounting hole 410, and the connection pipe 300 can be guided into the mounting hole 410 from the end with the smaller diameter of the mounting hole 410 and abut against the sealing member 930 in the quick-change head 910. Specifically, the quick-change head 910 has a housing groove 911, and the sealing member 930 is housed in the housing groove 911 and can be pressed against the bottom wall of the housing groove 911 by the coupling pipe 300. Further, the area of the end surface of the connection tube 300 is smaller than or equal to the area of the end surface of the sealing member 930, so as to be able to completely abut against the end surface of the sealing member 930, and the situation that the sealing member 930 cannot be pressed against the quick-change head 910 does not occur.

Referring to fig. 2 and 3, in the present embodiment, a through hole 420 communicating with the mounting hole 410 is formed in a sidewall of the mounting base 400, and the locking assembly 50 can automatically clamp the quick-change head 910 through the through hole 420. Specifically, the locking assembly 50 is secured to the mounting block 400. The locking assembly 50 includes a first driving member 510 and a clamping jaw 520 connected to the first driving member 510, wherein the first driving member 510 can drive the clamping jaw 520 to extend into the through hole 420 to clamp the quick-change head 910, or drive the clamping jaw 520 to withdraw from the through hole 420 to release the quick-change head 910. Further, the number of the through holes 420 is two, the clamping jaw 520 includes two clamping portions, the two clamping portions correspond to the two through holes 420 one by one, and the two clamping portions are driven by the first driving member 510 to approach each other and respectively extend into the through holes 420, so as to hold the quick-change head 910 tightly from two sides of the quick-change head 910. Since the locking assembly 50 is mounted on the mounting block 400 and fixed relative to the mounting block 400, the quick-change head 910 is locked relative to the mounting block 400 after the locking assembly 50 clasps the quick-change head 910.

Specifically, the clamping portion has a clamping surface 521 thereon, and the shape of the clamping surface 521 is adapted to the shape of the outer surface of the quick-change head 910 so as to be attached to the quick-change head 910 and have a larger contact area. In this embodiment, the quick-change head 910 has a cylindrical shape, and the clamping surface 521 is an arc surface that can be fitted to the outer wall surface of the quick-change head 910. Specifically, the first driving member 510 is a jaw cylinder capable of driving the two clamping portions to open or close. Specifically, the locking assembly 50 includes a first connecting plate 530, the first connecting plate 530 is fixedly connected to the mounting seat 400, and the first driving member 510 is mounted on the first connecting plate 530.

Specifically, in the present embodiment, the mounting base 400 is provided with an adjusting hole 430, an axial direction of the adjusting hole 430 is parallel to an axial direction of the mounting hole 410, and the adjusting hole 430 is communicated with the through hole 420. The locking assembly 50 includes a spring plunger 540, the spring plunger 540 being threadably coupled to the adjustment aperture 430 and capable of extending into the through-hole 420 to engage the clamping jaw 520 in a locked state. The spring plunger 540 is arranged to be engaged with the clamping jaw 520 when the clamping jaw 520 clamps the quick-change head 910, so as to prevent the quick-change assembly 90 from forcing the clamping jaw 520 to withdraw along the through hole 420 under the pushing force of the connecting tube 300, and achieve the purpose of locking the clamping jaw 520 in the through hole 420.

Specifically, the spring plunger 540 includes a plunger, a spring, and a ball, wherein a moving channel is formed inside the plunger, the spring is accommodated in the moving channel, and applies an elastic force to the ball to press the ball against an end of the moving channel, so that a part of the ball protrudes out of the plunger. The clamping jaw 520 is provided with a limiting hole 522, and when the clamping jaw 520 clamps the quick-change head 910, the marble can be just clamped into the limiting hole 522 under the elastic force action of the spring, so that the clamping jaw 520 is locked. Specifically, the surface of the marble is spherical, and the clamping jaw 520 can force the marble to press the spring to be accommodated in the plunger under the driving action of the first driving member 510, so that the clamping jaw 520 can be withdrawn from the through hole 420. Specifically, by rotating the spring plunger 540, the spring plunger 540 may be moved axially along the adjustment bore 430 to adjust the length of the spring plunger 540 extending into the through-bore 420 to ensure that the spring plunger 540 can engage the clamping jaw 520.

As shown in fig. 2 and 4, in the present embodiment, a flange 912 is formed on an outer wall surface of the quick-change head 910, and in the locked state, the flange 912 can abut against the locking assembly 50 along the axial direction of the mounting hole 410. When the connection pipe 300 applies pressure to the sealing member 930 in the axial direction of the mounting hole 410, the abutment of the flange 912 and the locking assembly 50 ensures that the quick-change head 910 is stably held on the locking assembly 50, and the quick-change head 910 is prevented from moving relative to the locking assembly 50.

Specifically, the flange 912 is annular and extends along the circumference of the quick-change head 910, and a tapered surface 913 is formed on the flange 912 and gradually tapers in a direction toward the connection tube 300. Thus, when the quick-change head 910 is mounted into the mounting hole 410, the tapered surface 913 can serve as a guide to facilitate the quick insertion of the quick-change head 910 into the mounting hole 410. In addition, the inner diameter of the mounting hole 410 is matched with the outer diameter of the flange 912, and only the flange 912 on the quick-change head 910 is in contact with the inner wall of the mounting hole 410, so that the contact area between the quick-change head 910 and the mounting hole 410 can be reduced, and the quick-change head 910 is prevented from being subjected to a large friction resistance when being guided into the mounting hole 410. Specifically, the flange 912 abuts against a side of the clamping portion facing the connection pipe 300. In some embodiments, the flange 912 has a clearance fit with an inner wall surface of the mounting block 400 to facilitate easier introduction of the quick-change head 910 into the mounting hole 410 and also to facilitate easier removal of the quick-change assembly 90 from the mounting hole 410.

Specifically, in the present embodiment, the bottom wall of the accommodating cavity 911 is penetratingly opened with a first through hole 914, the sealing member 930 is opened with a second through hole 931, and the first through hole 914 and the second through hole 931 are communicated to form a guiding channel 950. When the connection pipe 300 presses the sealing member 930 and presses the sealing member 930 against the bottom wall of the receiving groove 911, the first through hole 914 and the second through hole 931 are communicated and have good sealing performance, and meanwhile, the connection pipe 300 is tightly abutted against the sealing member 930, so that the second through hole 931 is communicated with the vacuum pumping channel 310 and has good sealing performance, and thus, the introduction channel 950 is communicated with the vacuum pumping channel 310 with good sealing performance. It should be noted that the needle cannula 22 can enter the second through hole 931 through the first through hole 914, and the sealing member 930 holds the needle cannula 22 tightly, so as to achieve the communication between the vacuum channel 310 and the needle cannula 22 and achieve a better sealing performance.

Specifically, the first via hole 914 has a tapered shape gradually shrinking in a direction approaching the receiving groove 911. It will be appreciated that the needle cannula 22 can enter through the large mouth end of the first through hole 914 and enter the second through hole 931 guided by the first through hole 914. the tapered design of the first through hole 914 may provide a guiding function for the needle cannula 22.

Specifically, the second through hole 931 includes a straight pipe section 931a and a tapered pipe section 931b, a small opening end of the tapered pipe section 931b is connected to the straight pipe section 931a, a large opening end of the tapered pipe section 931b is opposite to the first through hole 914, and a caliber of an end of the first through hole 914 near the seal 930 is smaller than a caliber of the large opening end of the tapered pipe section 931 b. In this way, the needle tube 22 can smoothly enter the large-mouth end of the conical tube section 931b and enter the straight tube section 931a through the small-mouth end of the conical tube section 931b by the guiding action of the first through hole 914. The diameter of the straight tube section 931a is smaller than that of the needle cannula 22, and after the needle cannula 22 enters the straight tube section 931a, the straight tube section 931a is expanded, so that the inner wall of the straight tube section 931a is tightly attached to the needle cannula 22, and the sealing member 930 can tightly hold the needle cannula 22 and has better sealing performance with the needle cannula 22.

Referring again to fig. 1 and fig. 2, in the embodiment, the vacuum pumping assembly 30 includes a second driving member 210, and the second driving member 210 is connected to the mounting base 400 to drive the mounting base 400 to move relative to the connecting tube 300, so as to compress the quick-change assembly 90 locked in the mounting base 400 by the connecting tube 300. Specifically, the vacuum pumping assembly 30 includes a second connection plate 220 connected to the connection pipe 300, and the second driving member 210 is mounted on the second connection plate 220. Specifically, the second driving member 210 is a cylinder, a cylinder body of the cylinder is mounted on the second connecting plate 220, a piston of the cylinder is connected to the mounting seat 400, and the piston drives the mounting seat 400 and the locking assembly 50 to move to be close to or far from the connecting pipe 300. Specifically, the vacuum pumping assembly 30 further comprises a degasser (not shown) and a conducting pipe 230, wherein one end of the conducting pipe 230 is connected to the degasser, and the other end is connected to the second connecting plate 220. The second connecting plate 220 is formed with a through hole capable of communicating the connecting pipe 300 and the conduction pipe 230, so that the degasser can vacuumize the product through the conduction pipe 230, the second connecting plate 220 and the connecting pipe 300. In other embodiments, the second connecting plate 220 may be omitted, so that the conduction pipe 230 is directly connected to the connection pipe 300. Alternatively, the conduction pipe 230 and the second connection plate 220 may be integrally formed with the connection pipe 300.

As shown in fig. 2 to 4, in detail, the mounting seat 400 includes a first connection portion 440 and a second connection portion 450, the first connection portion 440 is plate-shaped, the second connection portion 450 is cylindrical, and the second connection portion 450 is connected to the first connection portion 440, so that the mounting seat is T-shaped. The second driver 210 is connected to the second coupling portion 450, and the quick-change assembly 90 is mounted inside the second coupling portion 450. The mounting hole 410 penetrates the first connection portion 440 and the second connection portion 450.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An evacuation device, comprising:

2. The vacuum extractor as claimed in claim 1, wherein the mounting base has a mounting hole therethrough, and the quick-change assembly is mounted in the mounting hole; the vacuumizing device comprises a locking assembly, and the locking assembly can automatically lock the quick-change head in the mounting hole.

3. The vacuum extractor as claimed in claim 2, wherein the sidewall of the mounting base has a through hole communicating with the mounting hole; locking subassembly rigid coupling in on the mount pad, locking subassembly include first driving piece and with the clamping jaw that first driving piece is connected, first driving piece can drive the clamping jaw stretches into the through hole is in order to hold tightly the quick-change head, perhaps drive the clamping jaw is followed the through hole withdraws from in order to release the quick-change head.

4. The vacuum extractor as claimed in claim 3, wherein the mounting base is provided with an adjusting hole, an axial direction of the adjusting hole is parallel to an axial direction of the mounting hole, and the adjusting hole is communicated with the through hole; the locking assembly comprises a spring plunger, the spring plunger is in threaded connection with the adjusting hole and can extend into the through hole, so that the locking assembly is clamped with the clamping jaw in a locking state.

5. The vacuum extractor as claimed in claim 2, wherein a flange is formed on an outer wall surface of the quick-change head, and the flange is capable of abutting against the lock member in the axial direction of the mounting hole in the locked state.

6. The evacuation device of claim 5, wherein the flange is in clearance fit with an inner wall surface of the mounting block; and/or the flange extends along the circumferential direction of the quick-change head to form a ring shape, and a conical surface gradually contracting along the direction towards the connecting pipe is formed on the flange.

7. The vacuum extractor according to claim 1, wherein the quick-change head is provided with a receiving groove, and the sealing element is received in the receiving groove and can be pressed against the bottom wall of the receiving groove under the action of the connecting pipe; the bottom wall of the containing groove is provided with a first through hole in a penetrating mode, the sealing element is provided with a second through hole, and the first through hole is communicated with the second through hole to form the leading-in channel together.

8. The vacuum pumping apparatus as claimed in claim 7, wherein the first via hole has a tapered shape gradually shrinking along a direction approaching the receiving groove.

9. The evacuation device according to claim 7, wherein the second via hole includes a straight pipe section and a conical pipe section, a small opening end of the conical pipe section is connected to the straight pipe section, a large opening end of the conical pipe section is opposite to the first via hole, and a diameter of an end of the first via hole close to the sealing member is smaller than a diameter of a large opening end of the conical pipe section.

10. The evacuation device of claim 1, wherein the evacuation assembly comprises a second drive member coupled to the mount for driving the mount to move relative to the connection tube.