Connecting mechanism

Abstract

The utility model relates to the technical field of material conveying, in particular to a connecting mechanism. The connecting mechanism comprises two rigid pipe assemblies, each rigid pipe assembly comprises a rigid pipe and an anti-skid ring, one end of each rigid pipe is configured to be connected with equipment, and each anti-skid ring is installed in the corresponding rigid pipe and located at the end, away from the equipment, of the corresponding rigid pipe; the flexible pipe assembly comprises a flexible pipe and two supporting rings, the two ends of the flexible pipe extend into the two rigid pipes respectively, the supporting rings are flexible pieces and arranged at the two ends of the flexible pipe in a sleeving mode respectively, the outer side walls of the supporting rings abut against the inner side walls of the rigid pipes, and the ends, away from the ends of the flexible pipe, of the supporting rings abut against the ends of the anti-skid rings. The end of the flexible pipe can be prevented from being separated from the rigid pipe through cooperation between the supporting ring and the anti-skid ring, reliable sealing between the flexible pipe and the rigid pipe can be guaranteed through the supporting ring, and the environment cleaning cost and the risk that the pipeline falls off are reduced. And meanwhile, the flexible pipe is not easy to damage.

Description

Technical Field

[0001] This application relates to the technical field of material transportation, and particularly to a connecting mechanism. Background Art

[0002] In the powder industry, there are many weighing and metering systems. Since there are vibrating parts between the upper and lower equipment, in order to avoid the influence of vibrations between the upper and lower equipment on the pipeline and meet the requirements of the weighing system, corresponding measures need to be taken to ensure the process requirements. Therefore, a flexible connection method is required to connect the upper and lower equipment.

[0003] Currently, for flexible connections used under high weighing and metering requirements, normal pressure or slightly negative pressure conditions, most use silicone flexible connections. Usually, both ends of the silicone hose are respectively sleeved outside the pipelines of the upper and lower equipment, and hose clamps are used to fix the silicone hose to the pipeline.

[0004] However, the seal between the silicone hose and the pipeline of the equipment is unstable, and the fixed positions of the silicone hose and the hose clamp are prone to damage. Summary of the Utility Model

[0005] Based on this, this application provides a connecting mechanism to solve the problems in the related art that the seal between the silicone hose and the pipeline of the equipment is unstable, and the fixed positions of the silicone hose and the hose clamp are prone to damage.

[0006] The connecting mechanism provided by this application includes:

[0007] Two rigid pipe components, including a rigid pipe and an anti-slip ring. One end of the rigid pipe is configured to be connected to the equipment, the anti-slip ring is installed inside the rigid pipe, and the anti-slip ring is located at the end of the rigid pipe away from the equipment;

[0008] A flexible pipe component, including a flexible pipe and two support rings. Both ends of the flexible pipe respectively extend into the two rigid pipes. The support rings are flexible members. The two support rings are respectively sleeved at both ends of the flexible pipe. The outer side wall of the support ring abuts against the inner side wall of the rigid pipe, and one end of the support ring away from the end of the flexible pipe abuts against the end of the anti-slip ring.

[0009] In a possible implementation, the flexible pipe component further includes two first rebound rings respectively arranged at both ends of the flexible pipe, and the first rebound rings are located between the flexible pipe and the support rings.

[0010] In a possible implementation, at the end of the flexible pipe component, the end face of the flexible pipe and the end face of the support ring form a flow guiding surface;

[0011] The flow guiding surface gradually approaches the anti-slip ring from the outside to the inside in the radial direction of the flexible pipe component.

[0012] In a possible implementation, the flow guiding surface is an inclined surface that is inclined with respect to the inner wall of the rigid pipe, and the angle between the inclined surface and the inner wall of the rigid pipe is between 15° and 40°.

[0013] In a possible implementation, an annular groove is provided on the outer wall of the end of the flexible pipe, and the first resilient ring extends into the annular groove.

[0014] In a possible implementation, the end surfaces of the anti-slip ring and the support ring that abut against each other are respectively perpendicular to the axis of the rigid pipe.

[0015] In a possible implementation, the flexible pipe assembly further includes a second resilient ring, the second resilient ring is sleeved on the flexible pipe and fixed to the flexible pipe, and the second resilient ring is located between two support rings.

[0016] In a possible implementation, the number of the second resilient rings is multiple, and the multiple second resilient rings are arranged at intervals along the length direction of the flexible pipe.

[0017] In a possible implementation, the anti-slip ring is locked to the rigid pipe through a plurality of fasteners.

[0018] In a possible implementation, one end of each fastener facing the inside of the rigid pipe is located inside the anti-slip ring.

[0019] For the connection mechanism provided by the present application, the two rigid pipe assemblies are respectively used as the material conveying pipelines of the upper and lower devices. One end of the rigid pipe of the rigid pipe assembly is connected to the device, and the anti-slip ring of the rigid pipe assembly is installed inside the rigid pipe, and the anti-slip ring is located at the end of the rigid pipe away from the device. The two ends of the flexible pipe respectively extend into the two rigid pipes, the support rings at the two ends of the flexible pipe respectively abut against the anti-slip ring, and the outer wall of the support ring abuts against the inner wall of the rigid pipe. In this way, the cooperation between the support ring and the anti-slip ring can prevent the end of the flexible pipe from disengaging from the rigid pipe, and the support ring can also ensure reliable sealing between the flexible pipe and the rigid pipe, reducing the environmental cleaning cost and the risk of pipeline detachment. At the same time, there is no need to use a hose clamp to fix the flexible pipe and the rigid pipe, and the flexible pipe is not easily damaged. From the perspective of raw material cost, material waste can be reduced, operation cost can be saved, and the product yield can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1Schematic structural diagram of the connection mechanism provided by the embodiment of the present application;

[0022] Figure 2 Schematic structural diagram of the rigid pipe assembly provided by the embodiment of the present application;

[0023] Figure 3 Schematic structural diagram of the flexible pipe assembly provided by the embodiment of the present application;

[0024] Figure 4 Cross-sectional view of the flexible pipe assembly provided by the embodiment of the present application;

[0025] Figure 5 Partial enlarged schematic view of the flexible pipe assembly provided by the embodiment of the present application.

[0026] Explanation of reference numerals:

[0027] 100 - Rigid pipe assembly; 110 - Rigid pipe; 120 - Anti-slip ring; 130 - Fastener;

[0028] 200 - Flexible pipe assembly; 210 - Flexible pipe; 211 - Annular groove; 220 - Support ring; 230 - First resilient ring; 240 - Flow guiding surface; 250 - Second resilient ring. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0030] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0032] In the description and claims of the present application, and in the above-mentioned drawings, the terms "first", "second", "third" (if any) are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0033] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0034] In the prior art, currently, in the case of relatively high requirements for weighing and metering and under normal or slightly positive pressure conditions, most flexible connections used are silicone flexible connections. Generally, both ends of the silicone hose are respectively sleeved outside the pipes of the upper and lower devices, and hose clamps are used to fix the silicone hose to the pipes. However, the seal between the silicone hose and the device's pipe is unstable, and the fixed position of the silicone hose and the hose clamp is prone to breakage, resulting in the situation where the silicone hose slips and leaks powder. If the silicone hose and the device's pipe are connected by a flange connection method, the installation and disassembly of the silicone hose are more troublesome. If the pipes of two devices are connected by a bag-type flexible connection, external gas is likely to enter the system and contaminate the medium, or there is a risk of environmental pollution due to trace dust leakage.

[0035] After repeated thinking and verification, the inventor found that if the silicone hose and the device's pipe are connected in an embedded manner. Fixed structures can be respectively provided at the end portions of the device's pipe and the silicone hose. After the end portion of the silicone hose extends into the pipe, the fixed structure on the silicone hose cooperates with the fixed structure on the pipe, which can prevent the silicone hose from falling off the pipe. In addition, the fixed structure on the silicone hose can abut against the inner wall of the pipe to ensure a reliable seal between the silicone hose and the pipe. There is no need to use a hose clamp to fix the silicone hose to the pipe, and the silicone hose is not easily damaged.

[0036] In view of this, the inventor has designed a connecting mechanism, in which the rigid pipe can serve as the pipeline of the equipment, and an anti-slip ring is installed inside the rigid pipe and fixed at the end of the rigid pipe. Support rings are respectively installed at both ends of the flexible pipe. After the end of the flexible pipe extends into the rigid pipe, the end of the support ring abuts against the anti-slip ring in the rigid pipe, and the outer side wall of the support ring abuts against the inner wall of the rigid pipe. While ensuring the connection reliability between the flexible pipe and the rigid pipe, reliable sealing between the flexible pipe and the rigid pipe is achieved, and the flexible pipe is not easily damaged.

[0037] The following will describe in detail the technical solution of the connecting mechanism provided by the embodiment of the present application with reference to the accompanying drawings.

[0038] Refer to Figures 1-3 As shown in the figure, the connecting mechanism provided by the embodiment of the present application includes two rigid pipe assemblies 100 and a flexible pipe assembly 200. The two rigid pipe assemblies 100 include a rigid pipe 110 and an anti-slip ring 120. One end of the rigid pipe 110 is configured to be connected to the equipment. The anti-slip ring 120 is installed inside the rigid pipe 110, and the anti-slip ring 120 is located at the end of the rigid pipe 110 away from the equipment. The flexible pipe assembly 200 includes a flexible pipe 210 and two support rings 220. The two ends of the flexible pipe 210 respectively extend into the two rigid pipes 110. The support ring 220 is a flexible member, and the two support rings 220 are respectively sleeved at both ends of the flexible pipe 210. The outer side wall of the support ring 220 abuts against the inner side wall of the rigid pipe 110, and one end of the support ring 220 away from the end of the flexible pipe 210 abuts against the end of the anti-slip ring 120.

[0039] Among them, the rigid pipe 110 can be used as a material conveying pipeline, and after one end of it is connected to the upstream equipment or the downstream equipment, it can be used as a fixed part of the system. The length and diameter of the rigid pipe 110 can be set according to specific equipment, and no unique limitation is made here.

[0040] Schematically, the outer diameter of the anti-slip ring 120 is the same as the inner diameter of the rigid pipe 110, and the length of the anti-slip ring 120 can be 20 mm. The anti-slip ring 120 can be fixed to the rigid pipe 110 by means of snap connection, threaded connection or fastening by a fastener 130, etc., and no unique limitation is made here. It is worth mentioning that before the anti-slip ring 120 is installed on the rigid pipe 110, the burrs and flash at the end of the anti-slip ring 120 need to be polished to avoid damage to the flexible pipe assembly 200 caused by the anti-slip ring 120.

[0041] In a possible implementation, the flexible tube 210 and the two support rings 220 on the flexible tube 210 can be made of silicone material with good strength, which can meet the internal pressure requirements of the atmospheric pressure conveying pipeline, and the pressure is about 100 kPa. The support ring 220 can be fixed to the end of the flexible tube 210 by ultrasonic welding, bonding or integral molding. The length of the flexible tube 210 can be set according to actual needs and is not uniquely limited here.

[0042] During the process of connecting the rigid pipe assembly 100 and the flexible pipe assembly 200, the end of the flexible tube 210 can be first inserted into the inside of the rigid pipe 110. At this time, the support ring 220 on the end of the flexible tube 210 is also located inside the rigid pipe 110. Fix the anti-slip ring 120 to the rigid pipe 110, and the anti-slip ring 120 can abut against the support ring 220 to complete the connection between the rigid pipe assembly 100 and the flexible pipe assembly 200.

[0043] For the connection mechanism provided in this embodiment, the two rigid pipe assemblies 100 are respectively used as the material conveying pipelines of the upper and lower devices. One end of the rigid pipe 110 of the rigid pipe assembly 100 is connected to the device, and the anti-slip ring 120 of the rigid pipe assembly 100 is installed inside the rigid pipe 110, and the anti-slip ring 120 is located at the end of the rigid pipe 110 away from the device. The two ends of the flexible tube 210 are respectively inserted into the two rigid pipes 110, and the support rings 220 at both ends of the flexible tube 210 respectively abut against the anti-slip rings 120, and the outer side wall of the support ring 220 abuts against the inner side wall of the rigid pipe 110. In this way, through the cooperation between the support ring 220 and the anti-slip ring 120, the end of the flexible tube 210 can be prevented from coming out of the rigid pipe 110. The installation and disassembly of the flexible tube 210 are relatively easy. The support ring 220 can also ensure reliable sealing between the flexible tube 210 and the rigid pipe 110, ensuring the stability of the connection mechanism, effectively improving the on-site working environment, and avoiding environmental pollution caused by powder leakage in the use environment. At the same time, there is no need to use a hose clamp to fix the flexible tube 210 to the rigid pipe 110, and the flexible tube 210 is not easily damaged. From the perspective of raw material cost, material waste can be reduced, operating costs can be saved, the product yield can be improved, and the workload of manual inspection and replacement of the flexible tube 210 can be reduced.

[0044] In addition, the rigid pipe assembly 100 and the flexible pipe assembly 200 are not fixed by bolts, and the flexible tube 210 is convenient to disassemble and install, avoiding the risk of wear of the flexible tube 210 and the introduction of metal foreign objects into the production environment in some use environments with high requirements for metal foreign objects.

[0045] In one embodiment, as Figure 1 and Figure 2 shown, the anti-slip ring 120 is locked to the rigid pipe 110 through a plurality of fasteners 130.

[0046] Among them, bolts can be used as the fasteners 130. Exemplarily, the number of the fasteners 130 can be 3 or 4, and multiple fasteners 130 are arranged in an annular array around the axis of the rigid pipe 110. Specifically, a first hole for the fastener 130 to pass through is provided on the rigid pipe 110, and a second hole is provided at a position corresponding to the first hole on the anti-slip ring 120. The screw of the fastener 130 passes through the first hole and extends into the second hole to lock the anti-slip ring 120 on the rigid pipe 110.

[0047] Schematically, before fixing the anti-slip ring 120, it is necessary to first position the anti-slip ring 120 and the rigid pipe 110. One end of the anti-slip ring 120 away from the device is aligned with one end of the rigid pipe 110 away from the device. After positioning, drilling is performed on the rigid pipe 110 and the anti-slip ring 120 to form the first hole and the second hole. According to the average three or four equal parts of the pipe diameter, 3 or 4 fasteners 130 are provided to fix the anti-slip ring 120 and the rigid pipe 110.

[0048] Through the above settings, the anti-slip ring 120 can be reliably fixed on the rigid pipe 110, and at the same time, it is convenient to replace the anti-slip ring 120 on the rigid pipe 110.

[0049] In a specific embodiment, one end of each fastener 130 facing the inside of the rigid pipe 110 is located inside the anti-slip ring 120.

[0050] Exemplarily, the length of the bolt of each fastener 130 is 1 mm less than the sum of the thicknesses of the rigid pipe 110 and the anti-slip ring 120. Furthermore, one end of the fastener 130 facing the inside of the rigid pipe 110 is located inside the anti-slip ring 120.

[0051] This structure prevents the bolt of the fastener 130 from protruding from the inner side wall of the anti-slip ring 120 due to the excessive length of the bolt of the fastener 130. Furthermore, the fastener 130 will not damage the flexible pipe 210 passing through the anti-slip ring 120, that is, the fastener 130 will not cause the leakage of the material flowing in the flexible pipe 210.

[0052] In one embodiment, as Figures 3-5 shown, the flexible pipe assembly 200 further includes two first resilient rings 230 respectively arranged at both ends of the flexible pipe 210, and the first resilient rings 230 are located between the flexible pipe 210 and the support ring 220.

[0053] During the assembly of the flexible pipe assembly 200, the first resilient ring 230 is placed between the flexible pipe 210 and the support ring 220, and the flexible pipe 210 and the support ring 220 are connected to realize the fixation between the first resilient ring 230 and the flexible pipe 210. Among them, the first resilient ring 230 can be made of plastic with strong elasticity or SUS304 stainless steel.

[0054] In this structure, after the end of the flexible tube 210 extends into the rigid tube 110, the elastic force of the first resilient ring 230 keeps the cross-sectional shape of the support ring 220 circular. Under the elastic action of the first resilient ring 230, it is ensured that the outer sidewall of the support ring 220 is in close contact with the inner sidewall of the rigid tube 110, thereby ensuring the sealing reliability between the rigid tube 110 and the flexible tube 210 and avoiding the powder leakage caused by the poor sealing between the rigid tube 110 and the flexible tube 210.

[0055] In a specific embodiment, as Figure 3 and Figure 5 shown, at the end of the flexible tube assembly 200, the end face of the flexible tube 210 and the end face of the support ring 220 form a diversion surface 240. In the radial direction of the flexible tube assembly 200 from outside to inside, the diversion surface 240 gradually approaches the anti-slip ring 120.

[0056] As Figure 5 shown, the end face of the flexible tube 210 and the end face of the support ring 220 are joined to form the diversion surface 240. Optionally, the diversion surface 240 can be an inclined surface or an arc surface. In one possible implementation, after the support ring 220 is connected to the flexible tube 210, the ends of the support ring 220 and the flexible tube 210 can be cut to form the diversion surface 240. In another possible implementation, neither the end face of the flexible tube 210 nor the end face of the support ring 220 is parallel to the radial direction of the flexible tube 210. Before connecting the flexible tube 210 and the support ring 220, the two are first positioned, and after connection, the end face of the flexible tube 210 and the end face of the support ring 220 together form the diversion surface 240.

[0057] When the material in the rigid tube 110 flows into the flexible tube 210, the diversion surface 240 can guide the material falling on the diversion surface 240 into the interior of the flexible tube 210. That is to say, the diversion surface 240 on the flexible tube assembly 200 can prevent the material from accumulating at the end of the flexible tube assembly 200 during the flow from the rigid tube 110 to the flexible tube 210, resulting in pipeline blockage and affecting production.

[0058] In a specific implementation manner, as Figure 5 shown, the diversion surface 240 is an inclined surface inclined to the inner sidewall of the rigid tube 110, and the angle between the inclined surface and the inner sidewall of the rigid tube 110 is between 15° and 40°.

[0059] For example, the angle between the inclined surface and the inner side wall of the rigid pipe 110 can be 15°, 20°, 30°, 40°, etc., and there is no unique limitation here. When the angle between the inclined surface and the inner side wall of the rigid pipe 110 is less than 15°, the length of the end of the support ring 220 extending beyond the flexible pipe 210 is relatively long, and the material cost of the support ring 220 is relatively high; when the angle between the inclined surface and the inner side wall of the rigid pipe 110 is greater than 40°, the diversion surface 240 is relatively gentle, and the guiding effect of the diversion surface 240 on the material is poor.

[0060] In this embodiment, the diversion surface 240 is set as an inclined surface, which is convenient for the processing of the diversion surface 240. By limiting the angle between the inclined surface and the inner side wall of the rigid pipe 110, while ensuring the guiding effect of the diversion surface 240 on the material, the material cost of the support ring 220 is avoided from being relatively high.

[0061] Such as Figure 3 and Figure 5 shown, in a possible implementation manner, an annular groove 211 is provided on the outer side wall of the end of the flexible pipe 210, and the first resilient ring 230 extends into the annular groove 211.

[0062] Schematically, the size of the annular groove 211 matches the size of the first resilient ring 230, and the first resilient ring 230 is integrally embedded in the annular groove 211. The annular groove 211 can limit the first resilient ring 230, prevent the first resilient ring 230 from moving along the axial direction of the flexible pipe 210, ensure the reliability of the connection between the first resilient ring 230 and the flexible pipe 210, and further enable the first resilient ring 230 to reliably apply an elastic force to the support ring 220, thereby ensuring the reliability of the seal between the flexible pipe 210 and the rigid pipe 110.

[0063] In another possible implementation manner, the annular groove 211 can also be provided on the support ring 220, and the first resilient ring 230 is embedded in the annular groove 211 on the support ring 220. Or, a first annular groove 211 is provided on the flexible pipe 210, a second annular groove 211 is provided on the support ring 220 corresponding to the first annular groove 211, a part of the first resilient ring 230 extends into the first annular groove 211, and another part of the first resilient ring 230 extends into the second annular groove 211.

[0064] Optionally, as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 shown, the end faces of the anti-slip ring 120 and the support ring 220 that are in contact with each other are respectively perpendicular to the axis of the rigid pipe 110.

[0065] Specifically, the end face of the anti-slip ring 120 facing one end of the device and the end face of the support ring 220 away from one end of the device are both perpendicular to the axis of the rigid pipe 110. After the end of the flexible pipe 210 extends into the rigid pipe 110, the anti-slip ring 120 can reliably abut against the support ring 220, and there will be no separation parallel to the axial direction of the rigid pipe 110 between the anti-slip ring 120 and the support ring 220, avoiding the support ring 220 from slipping out of the anti-slip ring 120, thereby ensuring the reliability of the connection between the rigid pipe 110 and the flexible pipe 210.

[0066] In one embodiment, as Figure 1 and Figure 3 shown, the flexible pipe assembly 200 further includes a second resilient ring 250. The second resilient ring 250 is sleeved on the flexible pipe 210 and fixed to the flexible pipe 210, and the second resilient ring 250 is located between the two support rings 220.

[0067] Specifically, if there is vibration between the upper and lower devices, in order to ensure the reliable connection of the connecting mechanism between the upper and lower devices, the length of the flexible pipe 210 is relatively long. When the length of the flexible pipe 210 is relatively long, the middle of the flexible pipe 210 may be twisted and deformed, restricting the flow of the material conveyed inside the flexible pipe 210. When the length of the flexible pipe 210 exceeds 300 mm, by providing the second resilient ring 250 on the flexible pipe 210, using the elastic force of the second resilient ring 250, the cross-sectional shape of the connection position between the flexible pipe 210 and the second resilient ring 250 is ensured, so that the flexible pipe 210 is not easily twisted and deformed, thereby ensuring that the conveyance of the material inside the flexible pipe 210 is not affected.

[0068] Exemplarily, the second resilient ring 250 can be made of plastic with strong elasticity or SUS304 stainless steel. The second resilient ring 250 and the flexible pipe 210 can be fixed by bonding or welding, etc., which is not uniquely limited here.

[0069] Optionally, the number of the second resilient rings 250 is multiple, and the multiple second resilient rings 250 are arranged at intervals along the length direction of the flexible pipe 210.

[0070] Optionally, the multiple second resilient rings 250 are arranged at equal intervals on the flexible pipe 210. Among them, the specific number of the second resilient rings 250 can be set according to the length of the flexible pipe 210, which is not uniquely limited here. For example, when the length of the flexible pipe 210 exceeds 300 mm, starting from the end of the flexible pipe 210, one second resilient ring 250 is added at every 150 mm length position.

[0071] Through the above settings, when the length of the flexible pipe 210 is relatively long, the smoothness of the flexible pipe 210 is further ensured by the multiple second resilient rings 250, without affecting the flow of the material in the flexible pipe 210.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A connecting mechanism, characterized in that: include: Two rigid tube assemblies (100) include a rigid tube (110) and an anti-slip ring (120), wherein one end of the rigid tube (110) is configured to be connected to a device, the anti-slip ring (120) is installed inside the rigid tube (110), and the anti-slip ring (120) is located at an end of the rigid tube (110) away from the device; A flexible tube assembly (200) comprises a flexible tube (210) and two support rings (220), wherein two ends of the flexible tube (210) extend into two rigid tubes (110) respectively, and the support rings (220) are flexible parts. The two support rings (220) are respectively sleeved on the two ends of the flexible tube (210), and the outer side walls of the support rings (220) abut against the inner side walls of the rigid tubes (110), and one end of the support ring (220) away from the end of the flexible tube (210) abuts against the end of the anti-slip ring (120).

2. The connection mechanism according to claim 1, characterized in that: The flexible pipe assembly (200) further comprises two first elastic rings (230) respectively arranged at two ends of the flexible pipe (210), and the first elastic rings (230) are located between the flexible pipe (210) and the support ring (220).

3. The connection mechanism according to claim 2, characterized in that: At the end of the flexible pipe assembly (200), the end surface of the flexible pipe (210) and the end surface of the support ring (220) form a flow guide surface (240); The guide surface (240) gradually approaches the anti-slip ring (120) from the outside to the inside in the radial direction of the flexible pipe assembly (200).

4. The connection mechanism according to claim 3, characterized in that: The guide surface (240) is an inclined surface inclined to the inner side wall of the rigid tube (110), and the angle between the inclined surface and the inner side wall of the rigid tube (110) is between 15° and 40°.

5. The connection mechanism according to claim 2, characterized in that: An annular groove (211) is provided on the outer side wall of the end of the flexible tube (210), and the first rebound ring (230) extends into the annular groove (211).

6. The connection mechanism according to claim 1, characterized in that: The end surface of one end of the anti-slip ring (120) abutting against the support ring (220) and the end surface of one end of the support ring (220) abutting against the anti-slip ring (120) are respectively perpendicular to the axis of the rigid tube (110).

7. The connection mechanism according to claim 1, characterized in that: The flexible pipe assembly (200) further comprises a second resilient ring (250), wherein the second resilient ring (250) is sleeved on the flexible pipe (210) and fixed to the flexible pipe (210), and the second resilient ring (250) is located between the two support rings (220).

8. The connection mechanism according to claim 7, characterized in that: The number of the second elastic rings (250) is plural, and the plurality of second elastic rings (250) are arranged at intervals along the length direction of the flexible tube (210).

9. The connection mechanism according to any one of claims 1 to 8, characterized in that: The anti-slip ring (120) is locked on the rigid tube (110) via a plurality of fasteners (130).

10. The connection mechanism according to claim 9, characterized in that: One end of each fastener (130) facing the interior of the rigid tube (110) is located inside the anti-slip ring (120).

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