CN209876214U - Sleeve connecting device for connecting storage tank and outlet pipeline - Google Patents

Abstract

The utility model discloses a sleeve connection device for connecting a storage tank and an outlet pipeline, which comprises a sleeve assembly, the sleeve assembly includes at least two sleeves with different pipe diameters, the inner and outer sleeves of the two sleeves are connected, and the inner and outer sleeves The sleeve assembly can move axially. The inner and outer sleeves have ends connected to the flange respectively. The sleeve assembly is also equipped with a detachable radial positioning structure that can prevent the axial displacement of the inner and outer sleeves. The detachable radial positioning structure includes an outer sleeve connecting flange type positioning fit structure and an inner sleeve connecting flange type positioning fit structure. The sleeve coupling device of the utility model has the advantages of convenient disassembly and assembly, favorable maintenance and replacement, labor saving and economic benefits.

Description

A sleeve connection device for connecting storage tanks and outlet pipes

technical field

The utility model relates to the technical field of pipeline connection accessories, in particular to a sleeve connection device for connecting a storage tank and an outlet pipeline.

Background technique

In the industry where the pipeline transports fluid media, a connection structure is often used for transition between the outlet pipeline and the storage tank. At present, there are generally two commonly used connection methods, one is an integral structure, and the other is a split structure. The one-piece structure usually uses direct processing to make the connection structure and the storage tank integrally formed or through subsequent welding technology to connect the connection structure and the storage tank; the split structure usually adopts a flange structure, and bolts are used to make the flange close to the inner wall of the outlet end of the storage tank , and fix it at the outlet end of the storage tank.

The two connection methods in the prior art have their own disadvantages. For the one-piece type, if the thread or flange of the connection part of the storage tank outlet is damaged, the entire device must be replaced, resulting in a waste of labor and materials; for the split type, Since part of the connection structure is inside the storage tank, and the outlet diameter of the storage tank is fixed, if you want to adjust the size of the flow channel, you can only rely on replacing the connection structure. When disassembling this part of the structure, you need to fix the outer pipe part of the storage tank , resulting in operational difficulties.

In engineering applications, there are many connection structures for split installation. Intelligent machinery can be used for disassembly and assembly in the factory during construction, but manual disassembly and assembly is still required for the replacement of industrial pipelines and similar equipment in the laboratory. Since the connection structure is installed on a storage tank container, this type of container is also equipped with other related parts, such as gaskets, fixing devices, etc. Manual disassembly and assembly are time-consuming and laborious and seriously affect the continuity of the process. Disassembly and assembly In the process, it is also easy to damage the device and affect the accuracy.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a sleeve connection device for connecting the storage tank and the outlet pipeline. The sleeve connection device is easy to disassemble and easy to maintain and replace, and has the advantages of labor saving and economic benefits.

In order to achieve the above object, the technical solution adopted by the utility model is: a sleeve connection device connecting the storage tank and the outlet pipeline, which is characterized in that it includes a sleeve assembly, and the sleeve assembly includes at least two sleeves with different pipe diameters , two sleeves are connected inside and outside, and the inner and outer sleeves can move along the axial direction of the sleeve assembly. The detachable radial positioning structure, the other end of the outer sleeve relative to the pipe connection end is integrally connected with a flange end, and the flange end forms a sealed connection with the outlet end of the storage tank.

In the above structure, the sleeve assembly consists of at least two inner and outer sleeves with different pipe diameters. Usually, the outer sleeve is connected to the outlet end of the storage tank through the flange end, and the other end of the sleeve assembly can be connected through the outer sleeve or The pipe connection end of the inner sleeve is connected to the outlet pipe through the flange. At this time, the inner and outer sleeves are fixed by the detachable radial positioning structure. When the thread on the outer sleeve that matches the flange is damaged, or other When the size does not match the flange, the axial displacement of the inner sleeve is driven to move toward the flange and connected to the flange. When the inner sleeve moves in place, it is positioned radially by detachable The structure fixes the position of the inner and outer sleeves, so that the connection operation between the outlet pipe and the storage tank can be facilitated, and after a sleeve assembly is matched with multiple sizes of sleeves, it can realize the function of matching with flanges of various sizes , effectively saving costs and saving time for replacing coupling devices.

Further, the detachable radial positioning structure includes an outer sleeve connection flange type positioning cooperation structure and an inner sleeve connection flange type positioning cooperation structure.

In the above structure, both the inner and outer sleeves can be connected and matched with the flange, so the detachable radial positioning structure needs to have two positions for radial positioning and cooperation.

Further, the outer peripheral surface of the inner sleeve is provided with external threads, the inner hole wall of the outer sleeve is provided with internal threads, the outer peripheral surface of the outer sleeve is provided with external threads that can cooperate with the flange, and the inner sleeve and the outer sleeve The sleeves are screwed together to form a relatively movable matching structure along the axial direction of the sleeve. The outer peripheral wall of the inner sleeve is provided with a positioning hole, and the outer peripheral wall of the outer sleeve is provided with a positioning hole corresponding to the positioning hole of the inner sleeve. A positioning piece is screwed in the positioning through hole, and the positioning piece passes through the positioning through hole to form a detachable radial positioning structure with the inner sleeve.

In the above structure, the detachable radial positioning structure is mainly realized through the cooperation of threaded fasteners and threaded holes. When the outer sleeve is connected to the flange, the pipe connection end of the inner sleeve is located inside the outer sleeve. At this time , the positioning holes on the inner and outer sleeves correspond to the positioning through holes, and are fixed together by threaded fasteners; when the pipe connection end of the inner sleeve extends out of the outer sleeve to connect with the flange, the threaded fasteners After passing through the positioning through hole, it abuts against the outer peripheral surface of the inner sleeve to form a radial positioning fit. Of course, a blind hole of a certain length can also be provided on the peripheral surface for matching.

Further, after the positioning piece passes through the positioning through hole, it is screwed with the positioning hole on the inner sleeve to form an outer sleeve connection flange type positioning fit, and the positioning piece passes through the positioning through hole and abuts against the outer peripheral surface of the inner sleeve The inner sleeve is connected to form a flange-type positioning and matching structure.

Further, a radial end surface of the sleeve assembly facing the outlet pipe is provided with a force point, and the force point can cooperate with the power mechanism to drive the inner and outer sleeves to undergo axial displacement.

Further, the sleeve assembly includes at least three sleeves with different pipe diameters, which are respectively an inner sleeve, a middle sleeve and an outer sleeve, and the three sleeves form an inner, middle and outer sleeve structure, and the three sleeves The two sleeves can be displaced relative to each other along the axial direction of the sleeve assembly, and the inner, middle and outer sleeves respectively have pipe connection ends connected with outlet pipes.

In the above structure, the coupling device formed by the combination of three sleeves can match flanges of more sizes, which is the preferred structure.

Further, the inner hole walls and outer peripheral surfaces of the three sleeves are provided with threaded rings, the outer peripheral surface of the inner sleeve is provided with positioning blind holes for the inner sleeve, and the outer peripheral surface of the middle sleeve is provided with middle sleeves corresponding to the positioning blind holes. Sleeve positioning hole 1, the outer peripheral surface of the outer sleeve is provided with a first positioning through hole of the outer sleeve corresponding to the positioning hole of the middle sleeve. The surface is also provided with the second positioning hole of the middle sleeve, and the outer peripheral surface of the outer sleeve is provided with the second positioning through hole of the outer sleeve corresponding to the second positioning hole of the middle sleeve. The first positioning piece and the second positioning piece pass through the first positioning through hole of the outer sleeve and the second positioning through hole of the outer sleeve respectively to form a detachable radial positioning structure with the sleeve assembly. The orientation positioning structure includes an outer sleeve connecting flange plate type positioning matching structure, a middle sleeve connecting flange plate type positioning matching structure and an inner sleeve connecting flange plate type positioning matching structure.

In the above structure, the three-sleeve structure requires a double-layer positioning structure, that is, two pairs of the inner sleeve, the middle sleeve, and the outer sleeve are fixed by screw connections.

Further, when the first positioning piece passes through the first positioning through hole of the outer sleeve and the positioning hole of the middle sleeve, and then connects with the positioning blind hole of the inner sleeve, the second positioning piece passes through the second positioning hole of the outer sleeve. After the through hole, the double positioning structure connected with the positioning hole 2 of the middle sleeve constitutes the connecting flange type positioning and matching structure of the outer sleeve; the first positioning member passes through the first positioning through hole of the outer sleeve and connects While the inner sleeve positioning blind hole on the outer peripheral surface of the sleeve is connected, the second positioning member passes through the second positioning through hole of the outer sleeve and connects with the positioning hole of the middle sleeve. The double positioning structure constitutes the connecting flange of the middle sleeve Disk-type positioning and matching structure; while the first positioning member passes through the first positioning through hole of the outer sleeve and connects with the positioning hole of the middle sleeve, the second positioning member passes through the second positioning through hole of the outer sleeve and the middle sleeve The double positioning structure connected with the positioning blind hole of the inner sleeve behind the second positioning hole of the cylinder constitutes the flange plate type positioning matching structure connected with the inner sleeve.

In the above structure, when the outer sleeve is connected to the flange, the first positioning member passes through the first positioning through hole of the outer sleeve and the positioning hole of the middle sleeve, and then is threadedly connected with the positioning blind hole of the inner sleeve; the middle sleeve When connecting with the flange, it is first necessary to drive the middle sleeve to move axially so that the pipe connection end is exposed and connected to the flange, while the outer end of the middle sleeve (that is, the end facing the storage tank) is connected to the outer sleeve. A cavity is formed between the outer ends of the sleeve, which allows the first positioning member to pass through the first positioning through hole of the outer sleeve and abut against the inner sleeve on the outer peripheral surface of the inner sleeve The positioning fit is formed in the positioning blind hole; when the flange connection end of the inner sleeve protrudes and connects to the flange, the first positioning piece passes through the first positioning through hole of the outer sleeve and connects with the positioning hole of the middle sleeve A positioning structure is formed, and the second positioning member passes through the second positioning through hole of the outer sleeve and the second positioning hole of the middle sleeve, and then is threadedly connected with the positioning blind hole of the inner sleeve to the centering sleeve to form a positioning structure.

Further, each of the inner sleeve and the middle sleeve is provided with a force point on a radial end surface facing the outlet pipe, and the force point can cooperate with the power mechanism to drive the relative movement between the three sleeves along the axial direction of the sleeve assembly. displacement.

In the above structure, the radial end faces of the inner sleeve and the middle sleeve can be provided with raised positioning force points or recessed positioning force grooves for cooperating with power mechanisms (such as wrenches, screwdrivers, etc.).

Adopting the above-mentioned solution, the utility model has a simple structure, and various storage tanks with outlets can be connected to pipelines through the assembly of multiple sleeves, and the connection device is easy to operate, time-saving and cost-saving.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram that outer sleeve of the present invention is connected with flange plate, and flange plate is positioned at the left side in figure, and flange plate is not shown;

Accompanying drawing 2 is the structural representation that sleeve and flange are connected in the utility model, and flange is positioned at the left side in figure, and flange is not shown;

Accompanying drawing 3 is the schematic diagram of the structure of the connection between the inner sleeve and the flange of the utility model, the flange is located on the left side of the figure, and the flange is not shown;

Accompanying drawing 4 is the structural top view of sleeve assembly of the present utility model;

Accompanying drawing 5 is a schematic diagram of the appearance structure of the sleeve connecting device of the present invention connected with the storage tank;

Inner sleeve 1, middle sleeve 2, outer sleeve 3, inner sleeve positioning blind hole 11, middle sleeve positioning hole one 21, middle sleeve positioning hole two 22, outer sleeve first positioning through hole 31, outer sleeve The second positioning through hole 32 of the sleeve, the force point 4 , the first positioning piece 5 , the second positioning piece 6 , the storage tank 8 , and the flange end 7 .

Detailed ways

What the utility model describes is the sleeve connection device connecting the storage tank and the outlet pipeline. As shown in Figure 5, the connection port of the storage tank 8 is connected with the sleeve connection device through the flange end 7, and the flange end 7 is connected with the sleeve connection device. The connection port of the storage tank 8 is sealed and connected to the connection port of the storage tank 8 through a seal, and is fixed at the connection port of the storage tank 8 through fastening screws, while the other end of the flange end 7 is integrally connected with the sleeve connection device, especially the flange end 7 It is integrally connected with the outer sleeve 3 in the sleeve assembly.

The sleeve connection device includes a sleeve assembly. The sleeve assembly includes at least two sleeves with different pipe diameters. The two sleeves are connected inside and outside. There is a pipe end connected to the outlet pipe, and the pipe end and the outlet pipe are connected by a flange. In this way, when the size of the outer sleeve does not match the size of the flange, the inner sleeve can also be selected. When the inner sleeve is selected When the sleeve is connected or the outer sleeve is connected, the radial positioning structure is used to fix the position between the inner sleeve and the outer sleeve when it is detachable, preventing the axial displacement of the inner and outer sleeves. When it needs to be replaced, it can be First disassemble the positioning structure, adjust the position and then fix it.

When the sleeve assembly consists of only two inner and outer sleeves with different pipe diameters, usually, the pipe end of the outer sleeve is connected to the flange, and the flange end of the outer sleeve is formed with the outlet end of the storage tank. Sealed connection, at this time, the inner and outer sleeves are fixed in position through a detachable radial positioning structure. When the thread on the outer sleeve that matches the flange is damaged, or its size does not match the flange, the inner sleeve is driven to move axially to the flange and connected to the flange. When the inner sleeve is moved in place, the position of the inner and outer sleeves is fixed by a detachable radial positioning structure, so that the connection operation between the outlet pipe and the storage tank can be facilitated, and one sleeve assembly can be matched with sleeves of multiple sizes After the cylinder, it can realize the function of matching with flanges of various sizes, effectively saving costs and saving time for replacing coupling devices.

Specifically, the inner and outer sleeves are threaded to realize axial movement, and are also connected to the flange through external threads; the outer peripheral surface of the inner sleeve is provided with external threads, the inner hole wall of the outer sleeve is provided with internal threads, and the outer sleeve is provided with internal threads. The outer peripheral surface of the sleeve is provided with an external thread that can be matched with the flange, and the inner sleeve and the outer sleeve are threaded to form a relative movement and matching structure along the axial direction of the sleeve. The outer peripheral wall of the inner sleeve is provided with a positioning There is a positioning through hole on the outer peripheral wall of the outer sleeve corresponding to the positioning hole of the inner sleeve, and a positioning piece is screwed in the positioning through hole. After the positioning piece passes through the positioning through hole, it forms a detachable joint with the inner sleeve. Radial positioning structure. For a coupling device consisting of only two sleeves, only one set of positioning structures is needed to realize the adjustment and positioning of the two sleeves. That is, when the outer sleeve is connected to the flange, the pipe end of the inner sleeve is located inside the outer sleeve and the inner and outer sleeves are respectively flush with the radial end faces of the outlet pipes. At this time, the positioning holes on the inner and outer sleeves and the The positions of the positioning through holes correspond to each other and are fixed together by threaded fasteners (fasteners can be fastening screws or fastening bolts); when the flange connection end of the inner sleeve protrudes out of the outer sleeve When connecting, the threaded fastener passes through the positioning through hole and abuts against the outer peripheral surface of the inner sleeve to form a radial positioning fit. Of course, a blind hole of a certain length can also be provided on the inner sleeve peripheral surface for matching. After the positioning piece passes through the positioning through hole, it is screwed with the positioning hole on the inner sleeve to form an outer sleeve connection flange type positioning fit. After the positioning piece passes through the positioning through hole, it abuts against the outer peripheral surface of the inner sleeve to form an inner sleeve. Connect flange type positioning fit structure.

As a preferred structure, this embodiment also provides an example in which the sleeve assembly is composed of three sleeves with different pipe diameters. As shown in Figures 1-4, the three sleeves are the inner sleeve 1 and the middle sleeve 2 respectively. With the outer sleeve 3, the three sleeves form an inner, middle and outer socket structure, and the three sleeves can move relative to each other along the axial direction of the sleeve assembly. The inner, middle and outer sleeves have respectively At the end of the pipe connected to the outlet pipe, the end of the outer sleeve 3 facing the storage tank 8 is also integrally connected with a flange end 7, which is sealed and connected with the outlet end of the storage tank 8 through the flange end 7, and the sleeve assembly is also equipped with A detachable radial positioning structure that can prevent the axial displacement of the inner, middle and outer sleeves. The combination of the three sleeves requires a double positioning structure to realize the position fixation between the three sleeves.

Specifically, the inner hole walls and outer peripheral surfaces of the three sleeves are provided with threaded rings, the outer peripheral surface of the inner sleeve 1 is provided with inner sleeve positioning blind holes 11, and the outer peripheral surface of the middle sleeve 2 is provided with corresponding positioning blind holes. The middle sleeve positioning hole one 21, the outer peripheral surface of the outer sleeve 3 is provided with the outer sleeve first positioning through hole 31 corresponding to the middle sleeve positioning hole one 21, and the first positioning through hole is equipped with the first positioning member 5 The outer peripheral surface of the middle sleeve 2 is also provided with the second positioning hole 22 of the middle sleeve. The second positioning through hole 32 is matched with the second positioning piece 6, and the first positioning piece 5 and the second positioning piece 6 respectively pass through the first positioning through hole 31 of the outer sleeve and the second positioning through hole 32 of the outer sleeve together with the sleeve. The sleeve assembly forms a detachable radial positioning structure, the detachable radial positioning structure includes the outer sleeve connecting flange positioning and matching structure, the middle sleeve connecting flange positioning matching structure and the inner sleeve connecting flange Disc positioning and matching structure.

When the first positioning part 5 passes through the first positioning through hole 31 of the outer sleeve and the middle sleeve positioning hole 121, it is connected with the positioning blind hole 11 of the inner sleeve, and the second positioning part 6 passes through the second positioning hole of the outer sleeve. After the through hole 32, the double positioning structure connected with the second positioning hole 22 of the middle sleeve constitutes the outer sleeve connecting flange type positioning and matching structure; After the positioning piece 5 passes through the first positioning through hole 31 of the outer sleeve and abuts against the inner sleeve positioning blind hole 11 on the outer peripheral surface of the inner sleeve 1, the second positioning piece 6 passes through the second positioning through hole of the outer sleeve. After 32, the double positioning structure connected with the middle sleeve positioning hole 1-21 constitutes the middle sleeve connection flange type positioning cooperation structure; when the inner sleeve 1 is screwed out to the left, it is in the connection position with the flange (or outlet pipe) At the same time, the first positioning member 5 passes through the first positioning through hole 31 of the outer sleeve and is screwed to the middle sleeve positioning hole one 21. At the same time, the second positioning member 6 passes through the second positioning through hole 32 of the outer sleeve and connects with the inner sleeve. The double positioning structure connected by the sleeve positioning blind hole 11 constitutes an inner sleeve connection flange type positioning and matching structure. As shown in Figure 1, that is, when the outer sleeve 3 is connected with the flange, the first positioning member 5 passes through the first positioning through hole 31 of the outer sleeve, the middle sleeve positioning hole 121, and is blinded with the inner sleeve positioning. The hole 11 is threaded to connect the centering sleeve 2 and the inner sleeve 1 to form a positioning, and at the same time, the second positioning member 6 also forms a positioning to the outer sleeve 3 and the middle sleeve 2; as shown in Figure 2, the middle sleeve 2 and the flange When the disk is connected, it is first necessary to drive the middle sleeve 2 to move to the left axially so that the connecting end with the flange is exposed outside the outer sleeve 3 and the inner sleeve 1 and connected to the flange, while the outer side of the middle sleeve 2 end (that is, towards the end of the storage tank 8) and the outer end of the outer sleeve 3 to form a cavity; The positioning fit is formed in the positioning blind hole of the inner sleeve that traverses the past and abuts against the outer peripheral surface of the inner sleeve 1; as shown in Figure 3, when the end of the pipe of the inner sleeve 1 protrudes and connects to the flange, The first positioning part 5 then passes through the first positioning through hole 31 of the outer sleeve and is threadedly connected with the positioning hole 21 of the middle sleeve, and the centering sleeve 2 forms a positioning structure, while the second positioning part 6 passes through the first positioning hole of the outer sleeve. After the second positioning through hole 32 and the middle sleeve positioning hole 22, it is threadedly connected with the inner sleeve positioning blind hole 11 and the centering sleeve 2, the inner sleeve 1 and the outer sleeve 3 form a positioning structure. Both the above-mentioned first positioning member 5 and the second positioning member 6 can adopt structures such as bolts or screws.

Further, each of the inner sleeve 1 and the middle sleeve 2 is provided with a force point 4 on a radial end face facing the flange (or outlet pipe), and the force point 4 can cooperate with the power mechanism to drive the three sleeves to generate Relative displacement along the axial direction of the sleeve assembly. Specifically, the radial end surfaces of the inner sleeve 1 and the middle sleeve 2 can be provided with raised positioning force points or recessed positioning force grooves to cooperate with a power mechanism (such as a wrench, a screwdriver, etc.) to achieve adjustment.

The working principle of the utility model is briefly described as follows: the sleeve assembly composed of three pipe fittings with different diameters is selected, the outer sleeve 3 is the largest, the middle sleeve 2 is second, and the inner sleeve 1 is the smallest. Under normal circumstances, the outer sleeve 3 is used to connect with the downstream pipeline and fixed by a flange. When the outer thread of the outer sleeve 3 is damaged or does not match the flange, and the middle sleeve 2 meets the size requirements of the flange , use the supporting tool to loosen the first positioning piece 5 and the second positioning piece 6, and use the supporting tool to cooperate with the force part on the middle sleeve 2 to unscrew the pipe end of the middle sleeve 2, and use the first positioning piece 5 Fix the outer sleeve 3 and the inner sleeve 1, and fix the outer sleeve 3 and the middle sleeve 2 with the second positioning member 6; Unscrew, use the second positioning member 6 to fix the outer sleeve 3 , the middle sleeve 2 and the inner sleeve 1 , and use the first positioning member 5 to fix the outer sleeve 3 and the middle sleeve 2 . The sleeve assembly as a whole is connected to the outlet pipe through a flange, and its other end is fixed at the connection port of the storage tank 8 through the flange end 7 .

The utility model is not limited to the above-mentioned specific implementation manners, those skilled in the art can adopt various other specific implementation modes to implement the utility model according to the disclosed content of the utility model, or whoever adopts the design structure and ideas of the utility model, Do simple changes or changes, all fall into the protection scope of the present utility model.

Claims (9)

1. A sleeve connection device for connecting storage tanks and outlet pipes, characterized in that: it includes a sleeve assembly, the sleeve assembly includes at least two sleeves with different pipe diameters, the inner and outer sleeves of the two sleeves are connected, and the inner and outer sleeves The sleeve assembly can move axially between them. The inner and outer sleeves have pipe connection ends respectively. The sleeve assembly is also equipped with a detachable radial positioning structure that can prevent the axial displacement of the inner and outer sleeves. The outer sleeve is relatively The other end of the pipeline connection end is integrally connected with a flange end, and the flange end forms a sealed connection with the outlet end of the storage tank. 2. The sleeve connection device for connecting storage tanks and outlet pipes according to claim 1, characterized in that: the detachable radial positioning structure includes an outer sleeve connection flange type positioning fit structure and an inner sleeve Connect flange type positioning fit structure. 3. The sleeve connection device connecting the storage tank and the outlet pipeline according to claim 2, characterized in that: the outer peripheral surface of the inner sleeve is provided with external threads, the inner hole wall of the outer sleeve is provided with internal threads, and the outer sleeve is provided with internal threads. The outer peripheral surface of the sleeve is provided with an external thread that can be matched with the flange, and the inner sleeve and the outer sleeve are threaded to form a relative movement and matching structure along the axial direction of the sleeve. The outer peripheral wall of the inner sleeve is provided with a positioning There is a positioning through hole on the outer peripheral wall of the outer sleeve corresponding to the positioning hole of the inner sleeve, and a positioning piece is screwed in the positioning through hole. After the positioning piece passes through the positioning through hole, it forms a detachable joint with the inner sleeve. Radial positioning structure. 4. The sleeve connection device for connecting the storage tank and the outlet pipe according to claim 3, characterized in that: after the positioning member passes through the positioning through hole, it is screwed with the positioning hole on the inner sleeve to form an outer sleeve connection Flange type positioning fit, after the positioning piece passes through the positioning through hole, it abuts against the outer peripheral surface of the inner sleeve to form an inner sleeve connection flange type positioning fit structure. 5. The sleeve connection device for connecting the storage tank and the outlet pipe according to any one of claims 1-4, characterized in that: the sleeve assembly is provided with a force point facing a radial end surface of the outlet pipe, and the force The part can cooperate with the power mechanism to drive the inner and outer sleeves to have axial displacement. 6. The sleeve connection device for connecting storage tanks and outlet pipes according to claim 1 or 2, characterized in that: the sleeve assembly includes at least three sleeves with different pipe diameters, which are respectively the inner sleeve, the middle sleeve, and the middle sleeve. The sleeve and the outer sleeve, the three sleeves form an inner, middle and outer socket structure, and the three sleeves can move relative to each other along the axial direction of the sleeve assembly, and the inner, middle and outer sleeves are respectively Has a pipe connection end to connect with the outlet pipe. 7. The sleeve connection device for connecting storage tanks and outlet pipes according to claim 6, characterized in that: the inner hole walls and outer peripheral surfaces of the three sleeves are respectively provided with thread rings, and the outer peripheral surface of the inner sleeve is provided with The positioning blind hole of the inner sleeve, the middle sleeve positioning hole 1 corresponding to the positioning blind hole is provided on the outer peripheral surface of the middle sleeve, and the first positioning hole of the outer sleeve corresponding to the positioning hole 1 is provided on the outer peripheral surface of the outer sleeve. hole, the first positioning through hole of the outer sleeve is equipped with a first positioning piece, the outer peripheral surface of the middle sleeve is also provided with the second positioning hole of the middle sleeve, and the outer peripheral surface of the outer sleeve is provided with an outer sleeve corresponding to the second positioning hole of the middle sleeve. The second positioning through hole of the sleeve, the second positioning through hole of the outer sleeve is matched with the second positioning piece, the first positioning piece and the second positioning piece pass through the first positioning through hole of the outer sleeve and the second positioning hole of the outer sleeve respectively. After the through hole, it forms a detachable radial positioning structure together with the sleeve assembly. The detachable radial positioning structure includes an outer sleeve connecting flange positioning matching structure, a middle sleeve connecting flange positioning matching structure and The inner sleeve is connected to the flange type positioning fit structure. 8. The sleeve connection device for connecting the storage tank and the outlet pipeline according to claim 7, characterized in that: the first positioning member passes through the first positioning through hole of the outer sleeve and the positioning hole of the middle sleeve While the inner sleeve is positioned through the blind hole connection, the second positioning member passes through the second positioning through hole of the outer sleeve and connects with the second positioning hole of the middle sleeve. Structure: after the first positioning member passes through the first positioning through hole of the outer sleeve and is connected with the blind positioning hole of the inner sleeve on the outer peripheral surface of the inner sleeve, the second positioning member passes through the second positioning through hole of the outer sleeve The double positioning structure connected with the positioning hole of the middle sleeve constitutes the connecting flange type positioning and matching structure of the middle sleeve; the first positioning member passes through the first positioning through hole of the outer sleeve and the positioning hole of the middle sleeve At the same time of the first connection, the second positioning member passes through the second positioning through hole of the outer sleeve and the second positioning hole of the middle sleeve, and then connects with the positioning blind hole of the inner sleeve. The double positioning structure constitutes the connection flange type of the inner sleeve. Positioning fit structure. 9. The sleeve connection device for connecting the storage tank and the outlet pipe according to claim 8, characterized in that: each of the inner sleeve and the middle sleeve is provided with a force point on a radial end surface facing the outlet pipe. The force point can cooperate with the power mechanism to drive the relative displacement between the three sleeves along the axial direction of the sleeve assembly.