Pipeline connecting device and fluid conveying device

Abstract

The utility model discloses a pipeline connecting device and a fluid conveying device. The pipeline connecting device comprises a flange body and an extension assembly, wherein the flange body comprises a flange connecting section and a pipe connecting section which are connected with each other; the extension assembly comprises extension connecting pieces and an adjusting assembly, the extension connecting pieces are distributed on the periphery of the flange connecting section at intervals, and the adjusting assembly can adjust the extension connecting pieces to be close to or away from the flange connecting section in the radial direction of the flange body and can lock the relative positions of the extension connecting pieces and the flange connecting section; the extension connecting piece is provided with a long-strip connecting hole and / or a round hole, the long-strip connecting hole and the round hole are used for detachable connection of the extension connecting piece and a connected piece, the flange connecting section is also used for detachable connection with the connected piece, and the pipe connecting section is used for detachable connection with a pipeline. The universality of the pipeline connecting device is effectively improved, the connected piece is convenient to assemble, disassemble and overhaul, and the pipeline is convenient to assemble, disassemble, overhaul and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection, in particular to a pipeline connection device and a fluid conveying device. Background Art

[0002] The pipe connection device is a commonly used connection structure, which is used to connect two pipes, or to connect a pipe and a structure with a pipe joint, etc. Taking the engine bench test as an example, due to the limited laboratory space and the fact that the exhaust end of the engine and the exhaust end of the bench will be fixedly connected in advance, the setting position and setting orientation of the engine cannot be changed at will. Therefore, before conducting the bench test, it is necessary to make measurement plans in advance for the welding length, setting angle, etc. of the intake end flange and exhaust end flange of the after-treatment system to ensure that they can be smoothly connected to the engine and the bench. However, this operation will lead to a long preparation period and low experimental efficiency for the engine bench test. In addition, for engines of different specifications, the specifications of the intake end flange and exhaust end flange used are different, which will also lead to poor versatility of the intake end flange and exhaust end flange.

[0003] In view of this phenomenon, a detachable adjustable flange is disclosed in the prior art, which mainly includes a flange body and two rotating parts, both of which are rotatably connected to the outer periphery of the flange body and can rotate relative to the flange body, and the two rotating parts are detachably connected through a connecting assembly. By rotating the two rotating parts, the threaded holes on the rotating parts can be aligned with the connected parts, so as to improve the versatility. However, this detachable adjustable flange cannot adjust the outer diameter of the flange body, resulting in the inability to adapt to connect to connected parts of larger sizes, and the versatility needs to be improved. Utility Model Content

[0004] The utility model aims to provide a pipeline connection device and a fluid conveying device to solve the problem that a detachable adjustable flange in the prior art cannot adjust the outer diameter of the flange body, resulting in the inability to adapt to connect to larger size specifications of connected parts, and the versatility needs to be improved.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A pipe connection device, comprising:

[0007] A flange body, wherein the flange body comprises a flange connection section and a pipe connection section connected to each other;

[0008] An extension assembly, the extension assembly comprising an extension connector and an adjustment assembly, the extension connectors are spaced and distributed on the periphery of the flange connection section, the adjustment assembly can adjust the extension connector to approach or move away from the flange connection section in the radial direction of the flange body, and can lock the relative position of the extension connector and the flange connection section;

[0009] The extension connector is provided with a long connecting hole and / or a circular hole, and the long connecting hole and the circular hole are used for detachable connection between the extension connector and the connected member, the flange connecting section is also used for detachable connection with the connected member, and the pipe connecting section is used for detachable connection with the pipeline.

[0010] As a preferred solution of the above-mentioned pipeline connecting device, the adjustment assembly includes a limit anti-loosening block and two adjusting parts. Along the circumference of the flange body, the two adjusting parts are respectively distributed at both ends of the extended connecting part, and the limit anti-loosening block is distributed between the two adjusting parts; along the radial direction of the flange body, the adjusting part passes through the extended connecting part and is detachably connected to the flange connecting section, and the limit anti-loosening block is clamped between the extended connecting part and the outer peripheral wall of the flange connecting section.

[0011] As a preferred solution of the above-mentioned pipeline connecting device, the adjusting member is a screw, and the screw passes through the extension connecting member and is threadedly connected to the flange connecting section.

[0012] As a preferred solution of the above-mentioned pipeline connecting device, the elongated connecting hole is arc-shaped.

[0013] As a preferred solution of the above-mentioned pipeline connecting device, the elongated connecting hole is waist-shaped.

[0014] As a preferred solution of the above-mentioned pipeline connecting device, along the axial direction of the flange body, a recessed groove is provided on the end surface of the extended connecting piece close to the connected piece and / or on the end surface of the flange connecting section close to the connected piece, and the pipeline connecting device also includes an elastic piece, one end of the elastic piece is confined in the recessed groove, and the other end of the elastic piece extends out of the recessed groove and can be tightly pressed against the connected piece.

[0015] As a preferred solution of the above-mentioned pipeline connecting device, there are multiple epitaxial components, and the multiple epitaxial components are distributed at intervals along the circumference of the flange connecting section.

[0016] As a preferred solution of the above-mentioned pipeline connecting device, the pipe connecting section is provided with a sensor mounting seat and a connecting portion. Along the axial direction of the flange body, the connecting portion is away from the flange connecting section relative to the sensor mounting seat, and the connecting portion is used to connect to the pipeline.

[0017] A fluid conveying device comprises a pipeline and the above-mentioned pipeline connecting device, wherein the pipeline can be detachably connected to the pipe connecting section.

[0018] As a preferred solution of the above-mentioned fluid conveying device, the fluid conveying device further includes a clamp, and the clamp can connect the pipeline with the pipe connecting section.

[0019] Beneficial effects of the utility model:

[0020] The utility model aims to provide a pipeline connection device and a fluid conveying device. The pipeline connection device comprises a flange body and an extension assembly, wherein the flange body comprises a flange connection section and a pipe connection section connected to each other; the extension assembly comprises an extension connector and an adjustment assembly, wherein the extension connectors are spaced and distributed on the periphery of the flange connection section, and the adjustment assembly can adjust the extension connector to approach or move away from the flange connection section along the radial direction of the flange body, and can lock the relative position of the extension connector and the flange connection section; the extension connector is provided with a long connection hole and / or a round hole, and the long connection hole and the round hole are both used for detachable connection between the extension connector and the connected part, the flange connection section is also used for detachable connection with the connected part, and the pipe connection section is used for detachable connection with the pipeline.

[0021] When the pipeline connecting device is used to connect the pipeline and the connected part, when the size specification and distribution position of the installation hole of the connected part are compatible with the flange connection section, the connected part is connected to the flange connection section, and the pipe connection section is connected to the pipeline, so that the pipeline and the connected part can be connected and connected; when the size specification and distribution position of the installation hole of the connected part are not compatible with the flange connection section, the extension connector is adjusted by the adjustment component along the radial direction of the flange body to approach or move away from the flange connection section until the installation hole of the connected part is adjusted to be able to dock with the long strip connection hole or round hole of the extension connector, and then the relative position of the extension connector and the flange connection section is locked by the adjustment component. Position, connect the connected part with the extension connecting part, connect the pipe connecting section with the pipeline, so that the pipeline and the connected part can also be butt-connected, thereby effectively improving the versatility of the pipeline connecting device. It can be understood that by setting the long connecting hole, the versatility of the pipeline connecting device can be further improved; secondly, by setting the connection method between the extension connecting part and the connected part to be a detachable connection, the connection method between the flange connecting section and the connected part to be a detachable connection, and the connection method between the pipe connecting section and the pipeline to be a detachable connection, the pipeline connecting device can be reused, and it is convenient to install, disassemble and repair the connected parts, and it is convenient to install, disassemble, repair and replace the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a pipeline connection device provided by a specific embodiment of the utility model along a first viewing angle;

[0023] Figure 2 is a structural schematic diagram of a pipeline connection device provided by a specific embodiment of the utility model along a second viewing angle;

[0024] Figure 3 It is a fluid delivery device provided by a specific embodiment of the utility model;

[0025] Figure 4It is another fluid delivery device provided by a specific embodiment of the utility model;

[0026] Figure 5 It is another fluid conveying device provided by a specific embodiment of the utility model.

[0027] In the figure:

[0028] 1. Pipeline connection device;

[0029] 11. Flange body; 111. Flange connection section; 112. Pipe connection section; 1121. Sensor mounting seat; 1122. Connection part;

[0030] 12. epitaxial assembly; 121. epitaxial connector; 1211. long connecting hole; 122. position limiting anti-loosening block; 123. adjusting member;

[0031] 13. Elastic parts;

[0032] 2. Hoop;

[0033] 31. Straight pipe; 32. Bellows; 33. Catalytic oxidizer; 34. Particle collector. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] The utility model provides a pipeline connection device, such as Figure 1-2 As shown, the pipeline connection device 1 includes a flange body 11 and an extension component 12, the flange body 11 includes a flange connection section 111 and a pipe connection section 112 connected to each other; the extension component 12 includes an extension connector 121 and an adjustment component, the extension connector 121 is spaced apart on the outer periphery of the flange connection section 111, the adjustment component can adjust the extension connector 121 to approach or move away from the flange connection section 111 along the radial direction of the flange body 11, and can lock the relative position of the extension connector 121 and the flange connection section 111; the extension connector 121 is provided with a long connection hole 1211 and / or a circular hole, the long connection hole 1211 and the circular hole are both used for detachable connection between the extension connector 121 and the connected member, the flange connection section 111 is also used for detachable connection with the connected member, and the pipe connection section 112 is used for detachable connection with the pipeline.

[0039] like Figure 1-2As shown, when the pipeline connection device 1 is used to connect the pipeline and the connected part, when the size specification and distribution position of the installation hole of the connected part are compatible with the flange connection section 111, the connected part is connected to the flange connection section 111, and the pipe connection section 112 is connected to the pipeline, so that the pipeline and the connected part can be connected and connected; when the size specification and distribution position of the installation hole of the connected part are not compatible with the flange connection section 111, the extension connection piece 121 is adjusted by the adjustment component along the radial direction of the flange body 11 to be close to or away from the flange connection section 111 until the installation hole of the connected part is adjusted to be able to dock with the long strip connection hole 1211 or the round hole of the extension connection piece 121, and then the extension connection piece 121 and the flange connection are locked by the adjustment component. The relative position of the segment 111 connects the connected part with the extension connector 121, and connects the pipe connecting segment 112 with the pipeline, so that the pipeline and the connected part can also be butt-connected, thereby effectively improving the versatility of the pipeline connecting device 1. It can be understood that by setting the long connecting hole 1211, the versatility of the pipeline connecting device 1 can be further improved; secondly, by setting the connection method between the extension connector 121 and the connected part to be detachable, the connection method between the flange connecting segment 111 and the connected part to be detachable, and the connection method between the pipe connecting segment 112 and the pipeline to be detachable, the pipeline connecting device 1 can be reused, and it is convenient to install, disassemble and repair the connected parts, and it is convenient to install, disassemble, repair and replace the pipeline.

[0040] Specifically, bolts or screws can be used to pass through the long connection hole 1211 or the round hole to thread the extension connector 121 and the connected member, so as to achieve detachable connection between the extension connector 121 and the connected member. Bolts or screws can be used to detachably connect the flange connection section 111 and the connected member.

[0041] Among them, Figure 1-2As shown, the adjustment component includes a limit locking block 122 and two adjustment members 123. Along the circumference of the flange body 11, the two adjustment members 123 are respectively distributed at both ends of the extension connecting member 121, and the limit locking block 122 is distributed between the two adjustment members 123. Along the radial direction of the flange body 11, the adjustment member 123 passes through the extension connecting member 121 and is detachably connected to the flange connecting section 111, and the limit locking block 122 is clamped between the extension connecting member 121 and the outer peripheral wall of the flange connecting section 111. The limiting anti-loosening block 122 is sandwiched between the outer peripheral wall of the extension connector 121 and the flange connection section 111, so that by replacing the limiting anti-loosening blocks 122 of different specifications, the distance between the extension connector 121 and the flange connection section 111 can be adjusted along the radial direction of the flange body 11, so that the elongated connecting hole 1211 or the circular hole of the extension connector 121 can be adjusted to dock with the mounting hole of the connected part; after the distance between the extension connector 121 and the flange connection section 111 is adjusted, the adjusting Part 123 passes through the extension connector 121 and is detachably connected to the flange connection section 111 to lock the relative position of the extension connector 121 and the flange connection section 111; secondly, the limit anti-loosening block 122 is clamped between the extension connector 121 and the outer peripheral wall of the flange connection section 111. When affected by external vibrations and the like, the limit anti-loosening block 122 can prevent the connection between the adjustment part 123 and the flange connection section 111 from loosening, thereby further improving the working performance of the extension component 12.

[0042] Specifically, Figure 1-2 As shown, the adjusting member 123 is a screw, which passes through the extension connector 121 and is threadedly connected to the flange connection section 111. By screwing the screw, the relative position of the extension connector 121 and the flange connection section 111 can be locked, and the limit loosening prevention block 122 is sandwiched between the extension connector 121 and the outer peripheral wall of the flange connection section 111 to prevent the screw from loosening; when the elongated connection hole 1211 or the round hole of the extension connector 121 is adjusted to dock with different connected parts, the screw is screwed to increase or decrease the distance between the extension connector 121 and the flange connection section 111 until the adjustment installation hole docks with the elongated connection hole 1211 or the round hole, and then the limit loosening prevention block 122 of the corresponding specification is sandwiched between the outer peripheral wall of the extension connector 121 and the flange connection section 111, and then the screw is screwed to lock the relative position of the extension connector 121 and the flange connection section 111.

[0043] Preferably, in this embodiment, if Figure 1-2 As shown, the extension connector 121 is arc-shaped, and the limit loosening prevention block 122 is also arc-shaped; the curvature of the extension connector 121 and the curvature of the limit loosening prevention block 122 are both adapted to the outer peripheral shape of the flange connection section 111. The working effect of the extension assembly 12 can be further improved.

[0044] More preferably, if Figure 1-2 As shown, the long connecting hole 1211 is arc-shaped, which can further improve the docking accuracy of the long connecting hole 1211 and the mounting hole of the connected component.

[0045] It is understandable that the shape of the extension connector 121, the shape of the limit loosening block 122, and the peripheral shape of the flange connection section 111 are not limited. It is sufficient to ensure that the shape of the extension connector 121, the shape of the limit loosening block 122, and the peripheral shape of the flange connection section 111 are compatible. Exemplarily, the extension connector 121 and the limit loosening block 122 can be set in a long strip shape, and the peripheral shape of the flange connection section 111 can be a polygon such as a triangle or a quadrilateral. In this case, it is preferred that the long strip connection hole 1211 is waist-shaped.

[0046] Among them, Figure 1 As shown, along the axial direction of the flange body 11, a recessed groove is formed on the end surface of the extension connector 121 close to the connected part and / or on the end surface of the flange connection section 111 close to the connected part, and the pipeline connection device 1 also includes an elastic member 13, one end of which is limited in the recessed groove, and the other end of the elastic member 13 extends out of the recessed groove and can be pressed against the connected part. Specifically, for the recessed groove formed on the end surface of the extension connector 121 close to the connected part and the elastic member 13 is arranged in the recessed groove, when the extension connector 121 is threadedly connected to the connected part by using bolts or screws passing through the long connecting hole 1211 or the round hole, the elastic member 13 is compressed, and the two ends of the elastic member 13 are pressed against the inner wall of the recessed groove and the connected part respectively, which can effectively prevent the connection between the extension connector 121 and the connected part from loosening due to vibration and the like. With a recessed groove on the end surface of the flange connection section 111 close to the connected part, and an elastic member 13 disposed in the recessed groove, when the flange connection section 111 and the connected part are detachably connected by bolts or screws, the elastic member 13 is compressed, and the two ends of the elastic member 13 are respectively pressed against the inner wall of the recessed groove and the connected part, which can effectively prevent the connection between the flange connection section 111 and the connected part from loosening due to vibration and the like.

[0047] like Figure 1 As shown, preferably, the end surface of the extension connector 121 close to the connected part and the end surface of the flange connection section 111 close to the connected part are both provided with recessed grooves, so as to further improve the working performance of the pipeline connection device 1. In this embodiment, the recessed groove is only provided on the end surface of the extension connector 121 close to the connected part for example.

[0048] Specifically, one end of the elastic member 13 is fixed in the sink groove by welding or the like, or one end of the elastic member 13 is inserted in the sink groove.

[0049] Preferably, the elastic member 13 is a spring. In other embodiments, the elastic member 13 may also be made of elastic materials such as rubber.

[0050] Optionally, there are multiple extension components 12, and the multiple extension components 12 are distributed at intervals along the circumference of the flange connection section 111. This can further improve the working performance of the pipeline connection device 1. Figure 1-2 As shown, in this embodiment, three epitaxial components 12 are set as an example.

[0051] Among them, Figure 1-2 As shown, the pipe connection section 112 is provided with a sensor mounting seat 1121 and a connecting portion 1122. Along the axial direction of the flange body 11, the connecting portion 1122 is away from the flange connection section 111 relative to the sensor mounting seat 1121, and the connecting portion 1122 is used to connect with the pipeline. Specifically, after the pipeline is sleeved on the connecting portion 1122, the pipeline is sealed and connected to the connecting portion 1122 through a connecting piece such as a clamp 2, so that the pipeline and the flange body 11 are connected; secondly, by arranging the sensor mounting seat 1121 on the pipe connection section 112, after the sensor is installed on the sensor mounting seat 1121, the relevant parameters of the fluid flowing through the pipeline and the flange body 11 can be monitored.

[0052] Specifically, Figure 2 As shown, there are multiple sensor mounting seats 1121, and multiple sensor mounting seats 1121 are distributed at intervals in the pipe connecting section 112. So that multiple sensors with different functions can be installed, and multiple parameters of the fluid can be monitored. Specifically, the sensor mounting seat 1121 includes at least one of a temperature sensor mounting seat, a pressure sensor mounting seat, an oxygen sensor mounting seat, and a nitrogen oxide sensor mounting seat. The temperature sensor mounting seat is used to install a temperature sensor so that the temperature of the fluid flowing through the pipeline and the flange body 11 can be monitored. The pressure sensor mounting seat is used to install a pressure sensor so that the pressure of the fluid in the pipeline and the flange body 11 can be monitored. The oxygen sensor mounting seat is used to install an oxygen sensor so that the oxygen content in the pipeline and the flange body 11 can be monitored. The nitrogen oxide sensor mounting seat is used to install a nitrogen oxide sensor so that the nitrogen oxide content in the pipeline and the flange body 11 can be monitored.

[0053] The utility model also discloses a fluid conveying device, including a pipeline and the above-mentioned pipeline connecting device 1, wherein the pipeline can be detachably connected to the pipe connecting section 112, so as to be able to convey the fluid.

[0054] Specifically, Figure 3-5 As shown, the fluid conveying device further comprises a clamp 2, which can connect the pipeline with the pipe connecting section 112 to form a fluid conveying device.

[0055] Among them, Figure 3-5As shown, the pipeline includes but is not limited to a straight pipe 31, a hose, a curved pipe and a corrugated pipe 32. It is understandable that the pipeline can also be replaced by a structure with a pipe joint, such as a catalytic oxidizer 33 and a particulate collector 34.

[0056] It is understandable that the combination of the straight pipe 31, the bent pipe, the hose, the corrugated pipe 32, the clamp 2, the structure with the pipe joint and the above-mentioned pipe connection device 1 can form a fluid conveying device suitable for different working conditions. Specifically, Figure 3-5 As shown, the number of pipeline connection devices 1, the number of pipelines, and the number of structures with pipe joints can be selectively adjusted according to the expected length of the fluid conveying device; the specific type of pipeline can be selectively adjusted according to the expected setting orientation of the fluid conveying device, and the arrangement of the pipeline connection device 1, the pipeline and the structure with pipe joints can be selectively adjusted. It can be understood that both the bellows 32 and the hose can be bent, so that the setting orientation of the pipeline connection device 1 can be adjusted by adjusting the bending degree and bending orientation of the bellows 32, the bending degree and bending orientation of the hose; the setting orientation of the pipeline connection device 1 can also be adjusted by adjusting the setting orientation of the elbow. Thereby, the performance and versatility of the fluid conveying device are effectively improved, and it is also convenient to install, disassemble, maintain or replace one or more of the straight pipe 31, the elbow, the bellows 32, the clamp 2, the structure with pipe joints and the pipeline connection device 1.

[0057] For example, Figure 3 A pipeline connection device 1, two bellows 32 and a straight pipe 31 are combined to form a fluid delivery device suitable for the first working condition. The pipeline connection device 1, one bellows 32, the straight pipe 31 and the other bellows 32 are arranged in sequence.

[0058] For example, Figure 4 A pipeline connection device 1, three bellows 32 and two straight pipes 31 are combined to form a fluid delivery device suitable for the second working condition. The pipeline connection device 1, one bellows 32, one straight pipe 31, another bellows 32, another straight pipe 31 and another bellows 32 are distributed in sequence.

[0059] For example, Figure 5 Five pipeline connection devices 1, three bellows 32, a catalytic oxidizer 33 and a particle trap 34 are used to form a fluid delivery device suitable for the third working condition. The fluid delivery device can be used for bench tests of exhaust gas after-treatment systems.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pipe connection device, characterized in that: include: A flange body (11), wherein the flange body (11) comprises a flange connection section (111) and a pipe connection section (112) connected to each other; An extension assembly (12), the extension assembly (12) comprising an extension connection piece (121) and an adjustment assembly, the extension connection pieces (121) being spaced and distributed on the periphery of the flange connection section (111), the adjustment assembly being capable of adjusting the extension connection piece (121) to approach or move away from the flange connection section (111) in the radial direction of the flange body (11), and being capable of locking the relative position of the extension connection piece (121) and the flange connection section (111); The extension connector (121) is provided with an elongated connection hole (1211) and / or a circular hole, and the elongated connection hole (1211) and the circular hole are both used for detachable connection between the extension connector (121) and the connected member, the flange connection section (111) is also used for detachable connection with the connected member, and the pipe connection section (112) is used for detachable connection with a pipeline.

2. The pipe connection device according to claim 1, characterized in that: The adjustment component comprises a limit locking block (122) and two adjustment members (123); along the circumference of the flange body (11), the two adjustment members (123) are respectively distributed at two ends of the extension connecting member (121), and the limit locking block (122) is distributed between the two adjustment members (123); along the radial direction of the flange body (11), the adjustment member (123) passes through the extension connecting member (121) and is detachably connected to the flange connecting section (111), and the limit locking block (122) is clamped between the extension connecting member (121) and the outer peripheral wall of the flange connecting section (111).

3. The pipe connection device according to claim 2, characterized in that: The adjusting member (123) is a screw, which passes through the extension connecting member (121) and is threadedly connected to the flange connecting section (111).

4. The pipe connection device according to claim 1, characterized in that: The long connecting hole (1211) is arc-shaped.

5. The pipeline connection device according to claim 1, characterized in that: The long connecting hole (1211) is waist-shaped.

6. The pipeline connection device according to any one of claims 1 to 5, characterized in that: Along the axial direction of the flange body (11), a recessed groove is provided on the end surface of the extended connecting piece (121) close to the connected piece and / or on the end surface of the flange connecting section (111) close to the connected piece. The pipeline connecting device also includes an elastic piece (13), one end of the elastic piece (13) is confined in the recessed groove, and the other end of the elastic piece (13) extends out of the recessed groove and can be tightly pressed against the connected piece.

7. The pipeline connection device according to any one of claims 1 to 5, characterized in that: The number of the epitaxial components (12) is multiple, and the multiple epitaxial components (12) are distributed at intervals along the circumference of the flange connection section (111).

8. The pipeline connection device according to any one of claims 1 to 5, characterized in that: The pipe connecting section (112) is provided with a sensor mounting seat (1121) and a connecting portion (1122). Along the axial direction of the flange body (11), the connecting portion (1122) is away from the flange connecting section (111) relative to the sensor mounting seat (1121), and the connecting portion (1122) is used for connecting to a pipeline.

9. A fluid delivery device, comprising a pipeline, characterized in that: It also comprises the pipeline connecting device according to any one of claims 1 to 8, wherein the pipeline can be detachably connected to the pipe connecting section (112).

10. The fluid delivery device according to claim 9, characterized in that: The fluid conveying device further comprises a clamp (2), and the clamp (2) can connect the pipeline with the pipe connecting section (112).

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