CN219587768U - Packing mounting structure easy to maintain - Google Patents

Abstract

The utility model relates to the technical field of shaft seals, in particular to an easy-to-maintain packing installation structure, which comprises a packing cylinder, wherein the packing cylinder is sleeved on a shaft piece, a gap for accommodating packing is reserved between the packing cylinder and the periphery of the shaft piece, and a limiting part is convexly arranged on the packing cylinder towards the shaft piece; the packing cover is detachably connected to one side of the packing cylinder through a detachable connecting structure and sleeved on the shaft piece, and is provided with a packing part which is inserted in the gap in an adapting way; a filling space for filling the filler is formed between the limiting part and the filler part; the packing cover is formed by splicing a first cover piece and a second cover piece, and the first cover piece and the second cover piece are respectively and detachably connected with the packing cylinder, or the first cover piece and the second cover piece are spliced to be detachably connected with the packing cylinder. According to the preferred packing mounting structure, the packing cover is designed to be detachable in a split mode, so that the packing cover can be detached directly to enlarge the operation space for taking and changing materials, and the difficulty in taking and changing the packing is reduced.

Description

Packing mounting structure easy to maintain

Technical Field

The utility model relates to the technical field of shaft seals, in particular to an easy-to-maintain filler mounting structure.

Background

The screw pump is an eccentric displacement pump for conveying various fluids, and is composed of a discharge body, a stator, a rotor, a suction chamber, a bracket, a speed reducer and other parts. The stator and the rotor are meshed with each other to form a spiral meshing auxiliary line, and the meshing auxiliary line forms a multistage sealing cavity; the speed reducer is connected with the transmission shaft, the transmission shaft is connected with the connecting shaft, and the connecting shaft rod is connected with the rotor; the speed reducer drives the transmission shaft, the connecting shaft and the rotor to rotate; the rotor performs planetary motion in the stator cavity, materials enter the suction chamber through the feeding channel, and are conveyed by virtue of volume change generated by forward displacement of the meshing auxiliary line in the sealing cavity and discharged through the discharging channel.

It should be noted that, the joint of the transmission shaft and the external power source speed reducer needs to be provided with a shaft seal, so as to avoid leakage of materials, and the shaft seal is usually a mechanical seal or a packing seal. When using packing, such as packing, for example, as shown in fig. 2 below, a packing cylinder of annular column structure is needed to be sleeved on the transmission shaft and connected with a suction chamber shell outside the transmission shaft in a sealing way, a gap penetrating along the extending direction of the transmission shaft and used for packing is arranged between the packing cylinder and the periphery of the transmission shaft, and one end of the packing cylinder, which is far away from the speed reducer, is provided with a limiting part protruding towards the transmission shaft and used as a limiting structure for propping against one side of the packing when the packing is installed so as to prevent the packing from falling out from a port of the gap. Meanwhile, a packing cover is arranged on one side of the packing cylinder, which is close to the speed reducer, the packing cover is also of an annular column structure sleeved on the transmission shaft, and a packing part which protrudes towards the packing cylinder and is inserted in the gap in an adaptive manner is arranged on the packing cover. The packing cover is moved towards the packing cylinder, so that the packing part is inserted into the gap to compress and extrude the packing arranged in the gap, and the packing generates a shaft locking effect, thereby realizing sealing.

As the running time builds up, the packing wears out and needs to be replaced periodically, at which time the packing cover needs to be moved to leave sufficient space between the packing cover and the packing drum to remove the packing and replace the new packing. However, because the screw pump has a compact overall structure, the space for the filler cover to move is small, and the thickness of the filler cover provided with the filler part is larger, the filler cover cannot be moved alone to leave enough space for taking and changing materials, and as a result, the difficulty of taking and changing the filler is high.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art, and provides an easily maintained filler mounting structure, which can increase the operation space for taking and replacing materials by directly disassembling a filler cover through the split design of easily disassembling the filler cover so as to reduce the difficulty of taking and replacing the filler.

The technical solution of the utility model is as follows:

a packing mounting structure for mounting packing on an outer periphery of a shaft member to form a shaft seal, the packing mounting structure comprising:

the packing cylinder is sleeved on the shaft piece, a gap for accommodating the packing is formed between the packing cylinder and the periphery of the shaft piece, and a limiting part is convexly arranged on the packing cylinder towards the shaft piece;

the packing cover is detachably connected to one side of the packing cylinder through a detachable connecting structure and sleeved on the shaft piece, and is provided with a packing part which is adaptively inserted in the gap;

a filling space for the filler is formed between the limiting part and the filler part;

the packing cover is formed by splicing a first cover piece and a second cover piece which can be separated from the shaft piece in a radial direction, and the first cover piece and the second cover piece are respectively detachably connected with the packing cylinder, or the first cover piece and the second cover piece are spliced to be detachably connected with the packing cylinder.

In the above-mentioned scheme, to the movable space of packing lid little and packing lid own size is big, leads to being used for packing to get, the problem that the space of trading is little, sets up the packing lid to detachable split structure, namely sets up the packing lid to by first lid and second lid concatenation constitution, and first lid, second lid detachably connect in packing section of thick bamboo and carry out the location. When the packing needs to be taken and replaced, the first cover piece and the second cover piece can be removed, and then the packing cover can be directly removed, so that the operation space for taking and replacing the packing is enlarged, and the difficulty in taking and replacing the packing is reduced.

Further preferably, the detachable connection structure includes:

the first connecting column and the second connecting column are arranged on one side of the packing cylinder and protrude towards the packing cover;

the first connecting hole is arranged on the filler cover for the first connecting column to be inserted and the second connecting hole is used for the second connecting column to be inserted;

the first adjusting nut is in threaded connection with the end part of the first connecting column penetrating through the first connecting hole;

and the second adjusting nut is in threaded connection with the end part of the second connecting column penetrating out of the second connecting hole.

Further preferably, the first cover member is provided with a first through hole into which the first connecting post is inserted, and the first through hole is formed with the first connecting hole;

the second cover member is provided with a second through hole for inserting the second connecting column, and the second through hole is provided with the second connecting hole.

Further preferably, a first notch and a second notch are respectively arranged on two end surfaces of the first cover piece, which are spliced and attached with the second cover piece;

a third notch and a fourth notch are respectively arranged on the two end faces of the second cover piece, which are spliced and attached with the first cover piece;

the first notch and the third notch are aligned and spliced to form the first connecting hole, and the second notch and the fourth notch are aligned and spliced to form the second connecting hole.

Further preferably, the packing mounting structure further comprises a positioning piece, wherein the positioning piece is arranged at one side of the packing cover, which is far away from the packing cylinder, and is sleeved on the periphery of the shaft piece;

and the first cover piece and the second cover piece are detachably connected to one side surface of the positioning piece, which faces the packing cylinder.

Further preferably, the first cover member and the second cover member are detachably connected with the positioning member through connecting screws.

Further preferably, the positioning member is provided with a first positioning connection hole for inserting the first connection column and a second positioning connection hole for inserting the second connection column.

Further preferably, the first connecting column and the second connecting column are both screwed to the packing cylinder.

Further preferably, the first cover member and the second cover member are arranged in an axisymmetric manner.

Further preferably, the limiting portion and the filler portion are both annular structures disposed around the outer periphery of the shaft member.

The technical scheme has the main beneficial effects that:

the packing cover is arranged into a detachable split structure, so that the packing cover can be conveniently and directly detached, the operation space for taking and replacing packing is enlarged, the difficulty in taking and replacing the packing is reduced, and the convenience in packing maintenance is improved.

Further or more detailed benefits will be described in connection with specific embodiments.

Drawings

The utility model is further described with reference to the accompanying drawings:

fig. 1 is an assembly schematic diagram of the first cover member and the second cover member.

Fig. 2 is a schematic installation view of a conventional packing installation structure.

Fig. 3 is a schematic cross-sectional view of a prior art packing cylinder and packing cover.

Fig. 4 is a schematic assembly view of the first cover member and the second cover member.

Fig. 5 is a schematic installation view of the packing installation structure with the positioning member.

Fig. 6 is a schematic view of the assembly of the first cover member, the second cover member and the positioning member.

Fig. 7 is a schematic structural view of the packing cylinder, the first cover member, the second cover member and the positioning member.

The figure shows: a shaft element a, a filler b, a suction chamber shell c and a speed reducer d;

the packing tube 1, the limit part 101, the first connecting column 102, the second connecting column 103, the packing cover 2, the packing part 201, the first connecting hole 202, the second connecting hole 203, the first cover member 2a, the first notch 2a01, the second notch 2a02, the first packing part 2a03, the second cover member 2b, the third notch 2b01, the fourth notch 2b02, the second packing part 2b03, the first adjusting nut 3, the second adjusting nut 4, the positioning member 5, the first positioning connecting hole 501, the second positioning connecting hole 502, the first connecting screw 6, and the second connecting screw 7.

Detailed Description

The packing mounting structure hereinafter is mainly used for mounting the packing b to the outer periphery of the drive shaft in the screw pump to form the shaft seal, but it is of course also possible to use for mounting the packing b to the outer periphery of the shaft similar to the drive shaft in the screw pump to form the shaft seal.

Specifically, as shown in fig. 2, in the screw pump, one end of a shaft member a of a transmission shaft structure is inserted into a suction chamber housing c and connected to a connecting shaft inside the suction chamber housing c, and the other end is disposed outside the suction chamber housing c and connected to a conveying shaft of a speed reducer d. At this time, a large gap exists between the suction chamber housing c and the shaft member a, and a packing seal is required to be formed to form a shaft seal, so that the leakage of materials in the suction chamber housing c is avoided. It is therefore necessary to provide a packing mounting structure for mounting the packing b on the outer periphery of the shaft member a to form a shaft seal.

The filler mounting structure provided by the utility model is specifically illustrated below with reference to examples:

examples:

the packing mounting structure of the present embodiment, as shown in fig. 1 to 7, mainly includes a packing cylinder 1, and a packing cover 2.

Specifically, as shown in fig. 2 and fig. 3, the packing cylinder 1 is an annular column structure sleeved on the shaft member a, a gap for accommodating the packing b exists between the inner surface of the packing cylinder and the outer periphery of the shaft member a, and the outer surface of the packing cylinder is in sealing connection with the suction chamber housing c, wherein the packing b is preferably a packing. The packing cylinder 1 is convexly provided with a limit part 101 towards the shaft element a, and as shown in figure 2, the limit part 101 is arranged at the left end opening of the gap and is used for propping against the packing b at the left side so as to prevent the packing b from falling into the suction chamber shell c; the stopper 101 is preferably an annular projection provided around the outer periphery of the shaft member a so as to be able to perform a wider range of abutment against the filler b charged around the shaft member a.

As shown in fig. 2 and 3 of the accompanying drawings, the packing cover 2 is also an annular column structure sleeved on the shaft member a, and the packing cover 2 is detachably connected to one side of the packing cylinder 1 through a detachable connection structure, for example, in fig. 2, the packing cover 2 is detachably connected to the right side of the packing cylinder 1 through a detachable connection structure. The packing cover 2 is provided with a packing portion 201 which is fitted in the gap in a protruding manner, and a packing space for packing b is formed between the stopper portion 101 and the packing portion 201. Referring to the stopper portion 101, the filler portion 201 in the present embodiment is also preferably of an annular structure provided around the outer periphery of the shaft member a.

Before the packing barrel 1 and the packing cover 2 are fastened and installed, the packing barrel 1 is a positioning piece fixed on the shaft piece a, the packing cover 2 is a movable piece which is arranged on one side of the packing barrel 1 and movably sleeved on the shaft piece a, after packing b is filled in a gap between the shaft piece a and the packing barrel 1, the packing cover 2 can be fastened on the packing barrel 1, and the packing part 201 of the packing cover 2 is inserted into the gap to squeeze the packing b while the packing cover 2 is fastened on the packing barrel 1, so that the packing b has a shaft holding effect on the shaft piece a, and sealing is realized.

The detachable connection structure can be a screw connection structure, namely, the threaded end of a screw is inserted through the filler cover 2 and then screwed into the filler barrel 1, so that the filler cover 2 is fastened. And after the screw is disassembled, the filler cover 2 can be driven to be disassembled and moved.

The detachable connecting structure can also be a matching structure of the connecting column and the adjusting nut, and the packing cover 2 is sleeved on the connecting column for displacement, so that the connecting column can transversely guide and vertically support the packing cover 2.

As shown in fig. 2 and 3, the detachable connection structure includes a first connection post 102, a second connection post 103, a first connection hole 202, a second connection hole 203, a first adjustment nut 3, and a second adjustment nut 4.

Specifically, as shown in fig. 2 and 3, the first connecting column 102 is a column structure connected to the right side of the packing cylinder 1 and protruding rightward, and its extending direction is compliant to the extending direction of the shaft a; the second connecting columns 103 are arranged at intervals from the first connecting columns 102, and the second connecting columns 103 are also column structures which are connected to the right side of the packing cylinder 1 and are protruded rightward, and the extending direction of the second connecting columns is compliant with the extending direction of the shaft element a. The first connecting hole 202 is a through hole formed on the packing cover 2 for the first connecting post 102 to be inserted and fitted, and the second connecting hole 203 is a through hole formed on the packing cover 2 for the second connecting post 103 to be inserted and fitted. The first adjusting nut 3 is screwed to the end portion of the first connecting column 102 inserted through the first connecting hole 202, and the second adjusting nut 4 is screwed to the end portion of the second connecting column 103 inserted through the second connecting hole 203.

In this way, the position of the packing cover 2 on the connecting column can be adjusted by screwing the adjusting nut, and the insertion depth of the packing part 201 on the packing cover 2 in the gap is changed, so that the packing b in the gap can be always pressed. The adjusting nut is screwed and disassembled, so that the packing cover 2 can be in a movable state, and the packing cover 2 can be separated from the connecting column to move.

It should be noted that: as shown in fig. 2, the screw pump has a compact overall structure, so that the space for moving the packing cover 2 is small, and the packing cover 2 provided with the packing part 201 has a larger thickness, so that sufficient space for taking and changing the material cannot be reserved simply by moving the packing cover 2, and the difficulty of taking and changing the packing is high.

Based on this, in order to facilitate the direct disassembly of the packing cover 2, in this embodiment, the packing cover 2 is configured as a split structure, that is, the packing cover 2 is split into two parts by a certain ratio, so as to form a first cover member 2a capable of being directly radially separated from the shaft member a, and a second cover member 2b capable of being directly radially separated from the shaft member a, and after the first cover member 2a and the second cover member 2b are spliced, a through hole for inserting with the shaft member a is formed, and a first packing portion 2a03 on one side of the first cover member 2a and a second packing portion 2b03 on one side of the second cover member 2b are spliced to form the packing portion 201.

Of course, the filler cap 2 may be separated according to any ratio, provided that the first cap 2a and the second cap 2b can be directly detached from the shaft member a. In this embodiment, as shown in fig. 1 and fig. 4, the filler cap 2 is equally divided by the center line of the filler cap 2 to form a first cap member 2a and a second cap member 2b. Further, in order to facilitate the actual installation, the first cover member 2a and the second cover member 2b in the present embodiment are arranged in an axisymmetric manner, without additionally distinguishing the corresponding installation positions.

Further, the first connection hole 202 and the second connection hole 203 of the packing cover 2 are divided into different parts according to the dividing positions of the packing cover 2.

For example, as shown in fig. 3, the first connection hole 202 is provided at the upper end portion of the packing cover 2, and the second connection hole 203 is provided at the lower end portion of the packing cover 2.

In one form, the packing cover 2 may be divided into two parts, i.e., an upper part and a lower part, in which case the first cover member 2a and the second cover member 2b are detachably connected to the packing cylinder 1, respectively, and the first cover member 2a and the second cover member 2b can be detached by removing the connection structure.

Specifically, it is assumed that the upper half of the packing cover 2 is the first cover 2a, at this time, the through hole on the first cover 2a is the first connecting hole 202, the first connecting hole 202 is connected with the first connecting column 102 in an adapting manner, and the end portion of the first connecting column 102 inserted through the first connecting hole 202 is screwed with the first adjusting nut 3. The lower half part of the packing cover 2 is a second cover member 2b, at this time, the through hole on the second cover member 2b is a second connecting hole 203, the second connecting hole 203 is connected with the second connecting column 103 in an adapting manner, and the end portion of the second connecting column 103 penetrating out of the second connecting hole 203 is screwed with a second adjusting nut 4.

In another form, as shown in fig. 4, the packing cover 2 may be divided longitudinally into left and right parts, and the first and second connection holes 202 and 203 are also divided into two parts, and the first and second cover members 2a and 2b are detachably connected to the packing cylinder 1 by being spliced. The first cover member 2a and the second cover member 2b can be detached together by removing the connection structure.

Specifically, as shown in fig. 4, two end surfaces of the first cover member 2a, which are spliced and attached to the second cover member 2b, are respectively provided with a first notch 2a01 and a second notch 2a02; the second cover member 2b is provided with a third notch 2b01 and a fourth notch 2b02 at the two end surfaces thereof which are spliced and bonded with the first cover member 2 a. The first notch 2a01 is aligned with the third notch 2b01 to form a first connection hole 202, and the second notch 2a02 is aligned with the fourth notch 2b02 to form a second connection hole 203. At this time, the first adjusting nut 3 is screwed to the end portion of the first connecting column 102 inserted through the first connecting hole 202, and the first adjusting nut 3 pushes the first cover member 2a and the second cover member 2b together, and pushes and holds the upper ends of the first cover member 2a and the second cover member 2b together; similarly, the second adjusting nut 4 is screwed to the end portion of the second connecting column 103 inserted through the second connecting hole 203, and the second adjusting nut 4 pushes against the first cover 2a and the second cover 2b, and pushes against and retains the lower ends of the first cover 2a and the second cover 2b.

It should be noted that, through the two types of the above-mentioned forms, the first cover member 2a and the second cover member 2b can be fastened and pressed, so that the first filler portion 2a03 of the first cover member 2a can be pressed and inserted into the gap, and the second filler portion 2b03 of the second cover member 2b can be pressed and inserted into the gap. However, since the first cover 2a and the second cover 2b do not have a connection structure, misalignment between the covers is likely to occur, and stable movement is not possible at the same time.

Based on this, as shown in fig. 5, 6 and 7, a positioning member 5, preferably a thin disc structure, is added in this embodiment, the positioning member 5 is disposed on a side of the packing cover 2 away from the packing cylinder 1 and is sleeved on the periphery of the shaft member a, and the first cover member 2a and the second cover member 2b are detachably connected to a side surface of the positioning member 5 facing the packing cylinder 1.

In this way, the first cover part 2a and the second cover part 2b can be simultaneously retained by the positioning part 5 which occupies a small space and has a thin disc structure, for example, fig. 6 and fig. 7, so that the first cover part 2a and the second cover part 2b can be spliced into a stable filling cover 2. The ease of installation can be further enhanced by the attachment to the packing drum 1 after the formation of the secure packing cover 2, as shown for example in fig. 7.

Further, the first cover member 2a and the second cover member 2b are detachably connected with the positioning member 5 through connection screws, that is, for example, as shown in fig. 6 and 7, the first cover member 2a is detachably connected with the positioning member 5 through the second connection screw 7, the second cover member 2b is detachably connected with the positioning member 5 through the first connection screw 6, and the cover member and the positioning member 5 can be separated through the detachment of the connection screw, so that the removal action of the cover member is not hindered.

As shown in fig. 7, in this embodiment, a side surface of the positioning member 5 is completely attached to a side surface of the filler cap 2, so as to increase an attaching area between the positioning member 5 and the first cap 2a and between the positioning member 5 and the second cap 2b, and further improve connection tightness and stability between the positioning member 5 and the cap. At this time, in consideration of the mounting structure of the connection post, a first positioning connection hole 501 into which the first connection post 102 is inserted and a second positioning connection hole 502 into which the second connection post 103 is inserted are provided in the positioning member 5. When the installation is fastened, the external end of the first connecting column 102 sequentially penetrates through the first connecting hole 202 and the first positioning connecting hole 501, and the first adjusting nut 3 is screwed at the penetrated end part; the external end of the second connecting column 103 sequentially penetrates through the second connecting hole 203 and the second positioning connecting hole 502, and the second adjusting nut 4 is screwed at the penetrating end.

Through twisting the adjusting nut, the packing cover 2 and the locating piece 5 can be driven to move together, through dismantling the adjusting nut, the packing cover 2 and the locating piece 5 can be separated from the connecting column together, and then the connecting screw on the locating piece 5 is dismantled, and the first cover piece 2a and the second cover piece 2b can be dismantled, so that the packing cover 2 is dismantled.

Of course, considering that the connection column structure also occupies a part of the space during the taking and replacing of the packing b, the first connection column 102 and the second connection column 103 in this embodiment are both screwed to the packing cylinder 1, so that the first connection column 102 and the second connection column 103 are detached during the taking and replacing of the packing b, so as to further increase the operation space available for the taking and replacing of the packing b, and reduce the difficulty of taking and replacing the packing b.

The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. In addition, references to the terms "vertical", "horizontal", "front", "rear", etc., in the embodiments of the present utility model indicate that the apparatus or element in question has been put into practice, based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is conventionally put in use, merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. It should be further noted that, unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," and the like in the description are to be construed broadly as, for example, "connected," either permanently connected, detachably connected, or integrally connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A packing mounting structure for mounting a packing (b) on an outer periphery of a shaft member (a) to form a shaft seal, the packing mounting structure comprising:

a packing cylinder (1) which is sleeved on the shaft (a), a gap for accommodating the packing (b) exists between the packing cylinder and the periphery of the shaft (a), and a limit part (101) is convexly arranged on the packing cylinder (1) towards the shaft (a);

a packing cover (2) detachably connected to one side of the packing cylinder (1) through a detachable connection structure and sleeved on the shaft (a), wherein the packing cover (2) is provided with a packing part (201) which is adaptively inserted in the gap, and a packing space for the packing (b) is formed between the limiting part (101) and the packing part (201);

the method is characterized in that:

the packing cover (2) is formed by splicing a first cover piece (2 a) and a second cover piece (2 b) which can be separated from the shaft piece (a) in a radial direction, and the first cover piece (2 a) and the second cover piece (2 b) are respectively detachably connected with the packing cylinder (1), or the first cover piece (2 a) and the second cover piece (2 b) are spliced to be detachably connected with the packing cylinder (1).

2. The serviceable filler attachment arrangement of claim 1, wherein: the detachable connection structure includes:

a first connecting column (102) and a second connecting column (103) which are arranged on one side of the packing cylinder (1) and protrude towards the packing cover (2);

a first connecting hole (202) arranged on the filler cover (2) for inserting the first connecting column (102), and a second connecting hole (203) for inserting the second connecting column (103);

a first adjusting nut (3) which is screwed to the end of the first connecting column (102) penetrating through the first connecting hole (202);

and a second adjusting nut (4) which is screwed to the end part of the second connecting column (103) penetrating out of the second connecting hole (203).

3. The serviceable filler attachment arrangement of claim 2, wherein: the first cover (2 a) is provided with a first through hole for inserting the first connecting column (102), and the first through hole is provided with the first connecting hole (202);

the second cover (2 b) is provided with a second through hole for inserting the second connecting column (103), and the second through hole is provided with the second connecting hole (203).

4. The serviceable filler attachment arrangement of claim 2, wherein: a first notch (2 a 01) and a second notch (2 a 02) are respectively arranged on two end surfaces of the first cover piece (2 a) spliced and attached with the second cover piece (2 b);

a third notch (2 b 01) and a fourth notch (2 b 02) are respectively arranged on the two end surfaces of the second cover piece (2 b) which are spliced and attached with the first cover piece (2 a);

the first notch (2 a 01) and the third notch (2 b 01) are aligned and spliced to form the first connecting hole (202), and the second notch (2 a 02) and the fourth notch (2 b 02) are aligned and spliced to form the second connecting hole (203).

5. The maintenance-friendly filler mounting structure as claimed in any one of claims 3 to 4, wherein: the filler mounting structure further comprises a positioning piece (5), wherein the positioning piece (5) is arranged on one side, far away from the filler barrel (1), of the filler cover (2) and sleeved on the periphery of the shaft piece (a);

and the first cover piece (2 a) and the second cover piece (2 b) are detachably connected to one side surface of the positioning piece (5) facing the filling cylinder (1).

6. The serviceable filler attachment arrangement of claim 5, wherein: the first cover piece (2 a) and the second cover piece (2 b) are detachably connected with the positioning piece (5) through connecting screws.

7. The serviceable filler attachment arrangement of claim 5, wherein: the positioning piece (5) is provided with a first positioning connecting hole (501) for the first connecting column (102) to be inserted and a second positioning connecting hole (502) for the second connecting column (103) to be inserted.

8. The serviceable filler attachment arrangement of claim 2, wherein: the first connecting column (102) and the second connecting column (103) are both in threaded connection with the packing cylinder (1).

9. The serviceable filler attachment arrangement of claim 1, wherein: the first cover (2 a) and the second cover (2 b) are arranged in an axisymmetric manner.

10. The serviceable filler attachment arrangement of claim 1, wherein: the limiting part (101) and the packing part (201) are of annular structures arranged around the periphery of the shaft piece (a).