Filling machine liquid inlet assembly capable of preventing rotary slag falling

Abstract

The utility model relates to the technical field of filling machines, and particularly discloses a liquid inlet assembly of a filling machine capable of preventing slag falling during rotation, which comprises a liquid inlet pipe, a liquid outlet pipe, a liquid outlet pipe, a liquid outlet pipe and a liquid outlet pipe, and is characterized in that the liquid inlet pipe extends into a liquid storage tank from a liquid inlet of the liquid storage tank; the liquid inlet pipe is sleeved with the connecting device, and the connecting device is connected with the liquid inlet pipe in a sealed mode through a sealing assembly; a butt joint structure used for being in butt joint with the upper end of the liquid storage tank is arranged at the lower end of the connecting device so that the connecting device can coaxially rotate along with rotation of the liquid storage tank through the butt joint structure. And the dustproof piece is arranged outside the liquid inlet pipe in a sleeving manner and is located between the liquid inlet and the connecting device so as to shield the part, located outside the liquid inlet pipe, of the liquid inlet. According to the liquid storage tank, the dustproof piece used for shielding the part, located outside the liquid inlet pipe, of the liquid inlet is arranged outside the liquid inlet pipe in the sleeving mode, and therefore powder particles generated by friction between the sealing assembly and the liquid inlet pipe in the process that the connecting device rotates around the liquid inlet pipe are blocked outside the liquid inlet of the liquid storage tank.

Description

Technical Field

[0001] The utility model relates to the technical field of filling machines, in particular to a liquid inlet assembly of a filling machine capable of preventing slag from falling off during rotation. Background Art

[0002] A filling machine is a large-scale equipment used to pour liquid or semi-fluid products into pre-prepared containers. Usually, a filling machine is mainly composed of a liquid inlet system, a filling system, a sealing system and a control system, and can automatically complete a series of tasks such as bottle washing, filling, and capping. For a rotary filling machine, the liquid inlet pipe and the liquid storage tank in its liquid inlet system are usually connected in a split type. Therefore, the connecting device connecting the two parts needs to rotate around the liquid inlet pipe as the liquid storage tank rotates. During the rotation process, since a sealing ring is required between the connecting device and the liquid inlet pipe, after a long period of rotation, the sealing ring is worn and aged, and the powder particles that fall off are easily entered into the liquid storage tank through the gap between the connecting device and the liquid inlet pipe, thereby affecting the quality of the liquid in the liquid storage tank. Utility Model Content

[0003] In order to solve the problem in the prior art that there is a lack of dustproof parts at the connection between the liquid inlet pipe and the liquid storage tank, and that powder particles generated by the friction between the sealing component and the liquid inlet pipe during the rotation of the connecting device around the liquid inlet pipe are easy to enter the liquid storage tank, the utility model provides a filling machine liquid inlet assembly that prevents rotation and debris falling.

[0004] The technical solution adopted by the utility model is: a liquid inlet assembly of a filling machine for preventing rotation and slag falling, comprising:

[0005] A liquid inlet pipe, which is used to extend from the liquid inlet of the liquid storage tank into the liquid storage tank;

[0006] A connecting device, which is sleeved outside the liquid inlet pipe and is sealed to the liquid inlet pipe through a sealing assembly; a docking structure for docking the upper end of the liquid storage tank is provided at the lower end of the connecting device, so that the connecting device rotates coaxially with the rotation of the liquid storage tank through the docking structure;

[0007] The dustproof part is sleeved outside the liquid inlet pipe and is located between the liquid inlet port and the connecting device to cover the part of the liquid inlet port located outside the liquid inlet pipe.

[0008] Furthermore, the connecting device includes a connecting seat sleeved outside the liquid inlet pipe and a connecting shell sleeved outside the connecting seat; the liquid inlet pipe, the connecting seat and the connecting shell are coaxially arranged; a first sealing member is provided between the upper end of the connecting seat and the liquid inlet pipe to seal the gap therebetween, and a second sealing member is provided between the lower end of the connecting seat and the liquid inlet pipe to seal the gap therebetween.

[0009] Furthermore, the dustproof piece is circular, and has a cover plate and a side wall extending downward from the edge of the cover plate, the cover plate is used to cover the liquid inlet of the liquid storage tank, and the side wall is used to abut against the outer peripheral wall of the liquid inlet.

[0010] Furthermore, the transition surface between the cover plate and the side wall is arc-shaped.

[0011] Furthermore, a dust collecting pad is provided on the dustproof part, and the dust collecting pad is sleeved outside the liquid inlet pipe.

[0012] Furthermore, the liquid inlet pipe has a first connecting end for connecting to the liquid inlet main pipe, a second connecting end for connecting to the liquid storage tank, and a middle section located between the first connecting end and the second connecting end for medium flow, and the dust collecting pad includes a bottom surface and a side surface extending upward along the edge of the bottom surface, the bottom surface abuts against the bottom end of the middle section, and the inner wall of the side surface abuts against the outer wall of the middle section.

[0013] Furthermore, the gap between the connecting seat and the dustproof piece forms a chip removal port, the connecting shell has hollow holes evenly distributed along the circumferential direction, the hollow holes are opened along the vertical direction of the connecting shell, and the height of the lower end of the hollow holes is lower than the top of the dustproof piece.

[0014] Furthermore, the liquid inlet pipe has a compressed air inlet and a compressed air outlet, the compressed air inlet is connected to the vacuum equipment, and the compressed air outlet is connected to the air pipe of the cylinder on the filling head.

[0015] Furthermore, a connecting hole corresponding to the compressed air outlet is provided on the connecting seat, and the end of the connecting hole away from the liquid inlet pipe is connected to the cylinder air pipe, and the end of the connecting hole close to the liquid inlet pipe is connected to the compressed air outlet; a groove is also provided on the inner wall of the connecting seat in contact with the liquid inlet pipe, and the groove corresponds to the compressed air outlet, a first sealing groove is provided on the upper side of the groove, and a third sealing member is installed in the first sealing groove, and a second sealing groove is provided on the lower side of the groove, and a fourth sealing member is installed in the second sealing groove.

[0016] Furthermore, a bearing is provided between the connecting seat and the liquid inlet pipe for enabling the connecting seat to perform a rotational motion around the liquid inlet pipe.

[0017] The beneficial effect of the utility model is that the utility model arranges a dustproof part on the outer shell of the liquid inlet pipe to cover the part of the liquid inlet port located outside the liquid inlet pipe, thereby sealing the powder particles generated by the friction between the sealing assembly and the liquid inlet pipe when the connecting device rotates around the liquid inlet pipe outside the liquid inlet port of the liquid storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a cross-sectional view of a filling machine liquid inlet assembly for preventing rotational slag from being connected to a liquid storage tank according to the utility model;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 It is a schematic diagram of the overall structure of the utility model from the perspective of the first rear side after the liquid inlet assembly of the filling machine for preventing rotational slag falling is connected to the liquid storage tank;

[0021] Figure 4 This is a schematic diagram of the overall structure of the utility model from a second perspective after the liquid inlet assembly of a filling machine for preventing rotational slag is connected to a liquid storage tank.

[0022] Figure markings: 1. liquid inlet pipe, 101. first connecting end, 102. second connecting end, 103. middle section, 11. air inlet, 12. air outlet, 12', connecting hole, 2. connecting seat, 3. connecting shell, 4. dustproof part, 41. cover plate, 42. side wall, 43. transition surface, 5. liquid storage tank, 51. liquid inlet, 6. dust collecting pad, 61. bottom surface, 62. side surface, 7. chip removal port, 8. hollow hole, 9. bearing, 10. groove, 101. first sealing groove, 102. second sealing groove, 100. first sealing member, 100', second sealing member, 200, third sealing member, 200', fourth sealing member. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-4 The embodiments of the present utility model are described in detail.

[0024] Example 1

[0025] The utility model relates to a liquid inlet assembly of a filling machine for preventing slag from falling off during rotation, comprising: a liquid inlet pipe 1, which is used to extend from a liquid inlet port 51 of a liquid storage tank 5 into the liquid storage tank 5; a connecting device, which is sleeved on the outside of the liquid inlet pipe 1 and is sealedly connected to the liquid inlet pipe 1 through a sealing component; a docking structure for docking with the upper end of the liquid storage tank 5 is provided at the lower end of the connecting device, so that the connecting device can coaxially rotate with the rotation of the liquid storage tank 5 through the docking structure; a dustproof part 4, which is sleeved on the outside of the liquid inlet pipe 1 and is located between the liquid inlet port 51 and the connecting device, so as to shield the part of the liquid inlet port 51 located outside the liquid inlet pipe 1.

[0026] Specifically, Figure 1-4As shown, the liquid inlet pipe 1 includes a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to the liquid inlet main pipe of the filling machine, and the liquid outlet end is connected to the liquid inlet port 51 of the liquid storage tank 5. Furthermore, the liquid outlet end of the liquid inlet pipe 1 extends into the liquid storage tank 5 from the liquid inlet port 51 of the liquid storage tank 5; the connecting device is located at the lower end of the liquid inlet pipe 1 and the liquid inlet port 51 of the liquid storage tank 5, and the connecting device The docking structure can be a connecting flange; since the connecting device rotates coaxially with the rotation of the liquid storage tank 5 through the docking structure, in order to prevent powder particles generated by friction between the sealing assembly and the liquid inlet pipe 1 from entering the liquid storage tank 5 along the outer wall of the liquid inlet pipe 1 during the rotation process, a dustproof part 4 is provided on the outer sleeve of the liquid inlet pipe 1, and the dustproof part 4 is located between the liquid inlet port 51 and the connecting device. Taking the rotary filling machine as an example, when the connecting device rotates coaxially with the liquid storage tank 5, that is, rotates around the liquid inlet pipe 1, the powder particles generated by friction between the sealing assembly and the liquid inlet pipe 1 move downward along the outer wall of the liquid inlet pipe 1 and finally fall on the dustproof part 4.

[0027] Example 2

[0028] This embodiment is an improvement made on the basis of Embodiment 1, and the difference lies in that the connecting device includes a connecting seat 2 sleeved on the outside of the liquid inlet pipe 1 and a connecting shell 3 sleeved on the outside of the connecting seat 2; the liquid inlet pipe 1, the connecting seat 2 and the connecting shell 3 are coaxially arranged; a first sealing member 100 for sealing the gap between the upper end of the connecting seat 2 and the liquid inlet pipe 1 is provided, and a second sealing member 100' for sealing the gap between the lower end of the connecting seat 2 and the liquid inlet pipe 1 is provided.

[0029] Specifically, in order to make the connecting device and the dustproof member 4 form a whole, and improve the stability of the connecting device and the liquid storage tank 5 rotating around the liquid inlet pipe 1, as shown in FIG. Figure 1-4 As shown, the connection device is divided into a connection base 2 and a connection shell 3 sleeved outside the connection base 2, and the dustproof member 4 is arranged in the connection shell 3. The docking structure of the connection device is the flange at both ends of the connection shell 3. In order to avoid the first seal 100 and the second seal 100' can be an oil seal, a skeleton oil seal and a Y-type seal ring, and the Y-type seal ring is preferred in this application.

[0030] Example 3

[0031] This embodiment is an improvement on the embodiment 1, the difference being that the dustproof part 4 has a cover plate 41 and a side wall 42 extending downward from the edge of the cover plate 41, the cover plate 41 is used to cover the liquid inlet 51 of the liquid storage tank 5, and the side wall 42 is used to abut against the outer peripheral wall of the liquid inlet 51.

[0032] Specifically, the cover plate of the dustproof component 4 is circular and matches the liquid inlet 51 of the liquid storage tank 5. When in use, the cover plate 41 covers the liquid inlet 51 of the liquid storage tank 5 and blocks the part of the liquid inlet 51 outside the liquid inlet pipe 1, and the side wall 42 abuts against the outer peripheral wall of the liquid inlet 51 of the liquid storage tank 5, thereby blocking the powder particles generated by the friction between the sealing component and the liquid inlet pipe 1 on the cover plate 41.

[0033] Example 4

[0034] This embodiment is an improvement made on the basis of the embodiment 3, and the difference lies in that the transition surface 43 between the cover plate 41 and the side wall 42 is arc-shaped.

[0035] Specifically, Figure 1 and 2 As shown, there is a transition surface 43 between the cover plate 41 and the side wall 42. Since the dustproof member 4 is radially fixed by the connecting shell 3, the outer peripheral wall of the side wall 42 of the dustproof member 4 abuts against the inner peripheral wall of the connecting shell 3. Since the connecting member and the dustproof member 4 both rotate around the liquid pipe 1, in order to reduce the friction force generated by the dustproof member 4 and the connecting shell 3 during movement, the transition surface 43 of the dustproof member 4 is set to be an arc.

[0036] Example 5

[0037] In order to further prevent the powder particles generated by the friction between the sealing component and the liquid inlet pipe 1 from entering the dustproof part 4, and then entering the liquid storage tank 5 from between the dustproof part 4 and the liquid inlet pipe 1, thereby affecting the quality of the liquid in the liquid storage tank 5, a dust collecting pad 6 is further provided between the dustproof part 4 and the connecting seat 2. Figure 1 and 2 As shown, the dust collecting pad 6 is disc-shaped, and the dust collecting pad 6 is sleeved outside the liquid inlet pipe 1. The diameter of the dust collecting pad 6 can be set to be less than or equal to the diameter of the dust-proof part 4, so that the dust collecting pad 6 and the dust-proof part 4 can be stepped or cylindrical. Taking the stepped shape as an example, when powder particles are generated by friction between the sealing component and the liquid inlet pipe 1, the powder particles move downward along the outer wall of the liquid inlet pipe 1 and finally fall on the dust collecting pad 6. When there are enough powder particles on the dust collecting pad 6, they fall from the dust collecting pad 6 to the cover plate 41 of the dust-proof part 4. However, since the dust collecting pad 6 and the dust-proof part 4 are stepped, the powder particles will not enter the liquid storage tank 5 along the outer wall of the liquid inlet pipe 1 abutting against the dust-proof part 4.

[0038] Example 6

[0039] This embodiment is an improvement on the basis of Embodiment 5, the difference being that the liquid inlet pipe 1 has a first connecting end 101 for connecting to the liquid inlet main pipe and a second connecting end 102 for connecting to the liquid storage tank 5, and a middle section 103 for medium flow located between the first connecting end 101 and the second connecting end 102, the dust collecting pad 6 includes a bottom surface 61 and a side surface 62 extending upward along the edge of the bottom surface 61, the bottom surface 61 abuts against the bottom end of the middle section 103, and the inner wall of the side surface 62 abuts against the outer wall of the middle section 103.

[0040] Specifically, the entire dust collecting pad 6 is sleeved on the liquid inlet pipe 1, as shown in FIG. Figure 1 and 2 As shown, the dust collecting pad 6 is annular, and its bottom surface 61 abuts against the bottom end of the middle section 103 of the liquid inlet pipe 1, and the inner wall of the side surface 62 abuts against the outer wall of the middle section 103 of the liquid inlet pipe 1. The advantage of the above design is that it not only further blocks the powder particles generated by the friction between the sealing component and the liquid inlet pipe 1 outside the liquid storage tank 5, but also limits the movement of the liquid inlet pipe 1 in the radial direction, so that the liquid inlet is stable.

[0041] Example 7

[0042] This embodiment is an improvement on the basis of Embodiment 2, and the difference lies in that the gap between the connecting seat 2 and the dustproof part 4 forms a chip removal port 7, the connecting shell 3 has hollow holes 8 evenly distributed along the circumferential direction, the hollow holes 8 are opened along the vertical direction of the connecting shell 3, and the height of the lower end of the hollow holes 8 is lower than the top of the dustproof part 4.

[0043] Specifically, Figure 2 and 3 As shown, the chip discharge port 7 is an annular opening, which is respectively: the top of the chip discharge port 7 is the bottom of the connecting seat 2, and the bottom of the chip discharge port 7 is the dust collecting pad 6 and the cover plate 41 of the dustproof part 4. The opening of the chip discharge port 7 corresponds to the hollow hole 8 on the connecting shell 3. When cleaning the chip discharge port 7, a cleaning device such as a brush is directly extended from the hollow hole 8 to clean out the powder particles in the chip discharge port 7.

[0044] Example 8

[0045] This embodiment is an improvement made on the basis of the embodiment 1, the difference being that the liquid inlet pipe 1 has a compressed air inlet 11 and a compressed air outlet 12, the compressed air inlet 11 is connected to the vacuum equipment, and the compressed air outlet 12 is connected to the air pipe for the cylinder on the filling head.

[0046] Specifically, Figure 1 and 2As shown, the liquid inlet pipe 1 is a sandwich pipe, that is, it includes a liquid channel and a compressed air channel, wherein the compressed air channel includes a compressed air inlet 11 and a compressed air outlet 12, the compressed air inlet 11 is opened at one end of the liquid inlet pipe 1 close to the liquid inlet end, the compressed air outlet 12 is opened at one end of the liquid inlet pipe 1 close to the liquid storage tank 5, and there are two compressed air outlets 12, which are symmetrically distributed along the central axis of the liquid inlet pipe 1. When performing the filling operation, the air inlet is connected to the vacuum equipment, and the air outlet is connected to the cylinder of the filling head. The compressed air enters from the air inlet, flows along the compressed air channel of the liquid inlet pipe 1, and enters into the cylinder air pipe connected to the air outlet through the air outlet, thereby providing power to the cylinder to complete the filling of the filling head.

[0047] Example 9

[0048] This embodiment is an improvement made on the basis of Embodiment 8, and the difference lies in that a connecting hole 12' corresponding to the compressed air outlet 12 is provided on the connecting seat 2, and the end of the connecting hole 12' away from the liquid inlet pipe 1 is connected to the cylinder air pipe, and the end of the connecting hole 12' close to the liquid inlet pipe 1 is connected to the compressed air outlet 12, and a groove 10 is also provided on the inner wall of the connecting seat 2 in contact with the liquid inlet pipe 1, and the groove 10 corresponds to the compressed air outlet 12, and a first sealing groove 101 is provided on the upper side of the groove 10, and a third sealing component 200 is installed in the first sealing groove 101, and a second sealing groove 102 is provided on the lower side of the groove 10, and a fourth sealing component 200' is installed in the second sealing groove 102.

[0049] Specifically, since the compressed air needs to enter the cylinder connected to the filling head from the air outlet to provide power for the filling, a connecting hole 12' corresponding to the compressed air outlet 12 is opened on the connecting seat 2. There are two connecting holes 12', which are symmetrically distributed on the connecting seat 2 with the liquid inlet pipe 1 as the center axis. The end of the connecting hole 12' away from the liquid inlet pipe 1 is connected to the cylinder air pipe, and the end of the connecting hole 12' close to the liquid inlet pipe 1 is provided with an air pipe joint connected to the cylinder air pipe. When in use, the cylinder air pipe is inserted into the connecting hole 12' and connected to the air pipe joint, which can be connected in a quick connector plug-in manner. The compressed air enters from the air inlet 11 of the liquid inlet pipe 1 and comes out from the air outlet 12. The compressed air after coming out forms a closed loop between the liquid inlet pipe 1 and the connecting seat 2, so that the compressed air flows from the air inlet into the cylinder air pipe.

[0050] More specifically, a groove 10 is provided at a position corresponding to the connecting seat 2 and the compressed air outlet 12, and the groove 10 is annular. Since the compressed air needs to be connected to the cylinder air pipe after coming out of the outlet 12, an air pipe joint is installed in the groove. The air pipe joint extends from the inner wall of the groove 10 and extends toward the outer wall of the liquid inlet pipe 1. When the connecting seat rotates, the air pipe joint can rotate in the annular groove 10. When in use, the cylinder air pipe extends from the connecting hole 12' into the connecting seat 2 and connects with the air pipe joint. After the compressed air comes out of the outlet 12, it flows in the annular groove and enters the cylinder air pipe through the air pipe joint.

[0051] In order to ensure the filling metering of the filling head, Figure 2 As shown, a first sealing groove 101 is opened on the upper side of the groove 10, and a third sealing member 200 is installed in the first sealing groove 101. A second sealing groove 102 is opened on the lower side of the groove 10, and a fourth sealing member 200' is installed in the second sealing groove 102. Similarly, the first sealing groove 101 and the second sealing groove 102 are also annular. The third sealing member 200 and the fourth sealing member 200' here are preferably Gly rings with better sealing effect, thereby preventing compressed air from leaking from the gap between the inner wall where the connecting seat 2 contacts the liquid inlet pipe 1, resulting in insufficient filling pressure of the filling head.

[0052] Example 10

[0053] In order to realize the rotational motion of the connecting seat 2 around the liquid inlet pipe 1, a bearing 9 is provided between the connecting seat 2 and the liquid inlet pipe 1. Figure 1 and 2 As shown, there are two bearings 9 , and a spacer sleeve is provided between the two bearings 9 to stabilize the two bearings 9 . Here, the bearings 9 are preferably ball bearings 9 .

[0054] The filling machine liquid inlet assembly for preventing rotational slag in the present application takes a rotary filling machine as an example. When filling liquid such as red wine, compressed air enters the interlayer of the liquid inlet pipe 1 from the air inlet 11, flows along the interlayer to the air outlet, and finally enters the cylinder air inlet pipe connected to the air outlet; the red wine flows in from the liquid inlet end of the liquid inlet pipe 1, flows from the liquid pipeline to the liquid outlet end, and finally flows into the liquid storage tank 5; when filling, the liquid storage tank 5 and the connecting seat 2 rotate around the liquid inlet pipe 1. During the movement, the first sealing member installed between the upper end of the connecting seat 2 and the liquid inlet pipe 1 100, the second sealing member 100' installed between the lower end of the connecting seat 2 and the liquid inlet pipe 1, the third sealing member 200 installed in the first sealing groove 101 on the upper side of the groove 10, and the fourth sealing member 200' installed in the second sealing groove 102 on the lower side of the groove 10 all generate friction with the outer wall of the liquid inlet pipe 1. The powder particles generated by the long-term friction move downward along the gap between the connecting seat and the outer wall of the liquid inlet pipe 1, and the powder particles first fall on the dust collecting pad 6, and then fall from the dust collecting pad 6 to the cover plate 41 of the dustproof member 4, and finally the powder particles can be cleaned up from the chip discharge port 7.

[0055] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A filling machine liquid inlet assembly for preventing rotational slag, characterized in that: include: A liquid inlet pipe, which is used to extend from the liquid inlet of the liquid storage tank into the liquid storage tank; A connecting device, which is sleeved outside the liquid inlet pipe and is sealed to the liquid inlet pipe through a sealing assembly; a docking structure for docking the upper end of the liquid storage tank is provided at the lower end of the connecting device, so that the connecting device rotates coaxially with the rotation of the liquid storage tank through the docking structure; The dustproof part is sleeved outside the liquid inlet pipe and is located between the liquid inlet port and the connecting device to cover the part of the liquid inlet port located outside the liquid inlet pipe.

2. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 1 is characterized in that: The connecting device comprises a connecting seat sleeved outside the liquid inlet pipe and a connecting shell sleeved outside the connecting seat; The liquid inlet pipe, the connecting seat and the connecting shell are coaxially arranged; A first sealing member for sealing a gap between the upper end of the connecting seat and the liquid inlet pipe is provided, and a second sealing member for sealing a gap between the lower end of the connecting seat and the liquid inlet pipe is provided.

3. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 1 is characterized in that: The dustproof piece is circular and has a cover plate and a side wall extending downward from the edge of the cover plate. The cover plate is used to cover the liquid inlet of the liquid storage tank, and the side wall is used to abut against the outer peripheral wall of the liquid inlet.

4. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 3 is characterized in that: The transition surface between the cover plate and the side wall is arc-shaped.

5. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 4 is characterized in that: The dust-proof part is provided with a dust collecting pad, and the dust collecting pad is sleeved outside the liquid inlet pipe.

6. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 5 is characterized in that: The liquid inlet pipe has a first connecting end for connecting to the liquid inlet main pipe, a second connecting end for connecting to the liquid storage tank, and a middle section located between the first connecting end and the second connecting end for medium flow. The dust collecting pad includes a bottom surface and a side surface extending upward along the edge of the bottom surface, the bottom surface abuts against the bottom end of the middle section, and the inner wall of the side surface abuts against the outer wall of the middle section.

7. The filling machine liquid inlet assembly for preventing rotational slag dropping according to claim 2 is characterized in that: The gap between the connecting seat and the dustproof piece forms a chip removal port, the connecting shell has hollow holes evenly distributed along the circumference, the hollow holes are opened along the vertical direction of the connecting shell, and the height of the lower end of the hollow holes is lower than the top of the dustproof piece.

8. The filling machine liquid inlet assembly for preventing rotational slag drop according to claim 1 is characterized in that: The liquid inlet pipe has a compressed air inlet and a compressed air outlet. The compressed air inlet is used to be connected to a vacuum device, and the compressed air outlet is used to be connected to an air pipe of the cylinder on the filling head.

9. The filling machine liquid inlet assembly for preventing rotational slag dropping according to claim 2 is characterized in that: The connection seat is provided with a connection hole corresponding to the compressed air outlet, the end of the connection hole away from the liquid inlet pipe is used to connect with the cylinder air pipe, and the end of the connection hole close to the liquid inlet pipe is connected with the compressed air outlet; A groove is also provided on the inner wall of the connecting seat in contact with the liquid inlet pipe, and the groove corresponds to the compressed air outlet. A first sealing groove is provided on the upper side of the groove, and a third sealing member is installed in the first sealing groove. A second sealing groove is provided on the lower side of the groove, and a fourth sealing member is installed in the second sealing groove.

10. The filling machine liquid inlet assembly for preventing rotational slag dropping according to claim 2, characterized in that: A bearing is also provided between the connecting seat and the liquid inlet pipe for enabling the connecting seat to perform a rotational motion around the liquid inlet pipe.

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