CN114919930B - Pipe fitting conveying device - Google Patents

Abstract

The present invention relates to the technical field of pipe processing, and specifically to a pipe conveying device, comprising a conveyor belt and a conveying assembly installed side by side on the conveyor belt along the front-back direction, the conveying assembly having a receiving groove with an opening facing upward and extending horizontally to the left and right, the receiving groove being used to place the pipe, and the conveying assembly having a processing groove in the middle part in the left-right direction, the processing groove dividing the receiving groove into two parts spaced apart from the left and right. The conveying assembly has the receiving groove for the pipe to be placed horizontally to the left and right, ensuring that the pipe is placed on the conveying assembly stably and reliably, so that the pipe is not easily displaced during the subsequent processing; in addition, after the pipe is placed in the receiving groove, due to the presence of the processing groove, the middle part of the pipe is suspended above the processing groove, that is, the middle part of the pipe to be processed does not contact the body of the conveying assembly, which can avoid the interference of the physical structure of the conveying assembly on the pipe processing during the subsequent processing.

Description

A pipe conveying device

Technical Field

The invention relates to the technical field of pipe fitting processing, and in particular to a pipe fitting conveying device.

Background Art

A pipette is a measuring instrument used to accurately transfer a certain volume of solution. A pipette is a measuring instrument that is only used to measure the volume of the solution it releases. It is usually a slender glass tube with a pointed tip at the lower end and a marking line engraved on the neck of the upper end, which is a mark of the exact volume taken. Traditional pipettes are made of glass. Due to their small diameter and thin walls, they are easily broken and scrapped when cleaned after use. In order to change the above-mentioned shortcomings of pipettes, pipettes made of general polystyrene, i.e. GPPS material, have appeared. This type of pipette is disposable, not easy to break, and easy to use. However, the existing plastic nozzle stretching and molding manufacturing equipment has a low degree of automation, resulting in high production costs, which limits the promotion and application of plastic pipettes.

In response to the above problems, equipment that can produce pipettes with higher efficiency has emerged, such as a pipette heating and stretching forming device disclosed in the patent with application number CN202123324727.X, including a stretching table, a plurality of support tables are arranged on the stretching table, and the support tables are arranged at equal intervals. The support table includes a semi-arc plate, and a first zirconium oxide plate is arranged on the inner wall of the semi-arc plate. A movable frame is slidably matched with the stretching table, and a motor placement frame is arranged on the movable frame. A motor is arranged on the motor placement frame, and a screw is connected to the motor. The movable frame includes a rear plate, and a movable plate is slidably matched with the movable frame. The screw passes through the rear plate and the movable plate in turn and extends to one side of the movable plate. The screw is rotatably connected to the movable plate, and a mounting plate is arranged on the movable plate, and the mounting plate is located below the screw. This patent clamps one end of the pipette by two sets of clamping components, and then the clamping components slowly stretch the pipette in the hot plastic state, spray and cool it down during the stretching process, and finally form it; although the work efficiency is improved through automation, the temperature of the pipe is extremely high after it is extruded from the blow molding machine and stretched. It takes a long time from extrusion to stretching and cooling to form, and only one pipette is produced at a time. The overall production efficiency is still low; in addition, the production accuracy is poor, and the quality of the pipette is difficult to guarantee. Therefore, a conveying system that drives the pipe to move horizontally in a direction perpendicular to its own axis has emerged, which is used to transport the pipette on the pipette production line and process and shape its local position at the same time. However, the current conveying system has a low conveying efficiency and is not convenient for the pipette production line to process and shape the pipette.

Summary of the invention

The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a pipe conveying device, including a conveyor belt and a conveying assembly installed side by side on the conveyor belt along the front-to-back direction, the conveying assembly has a receiving groove with an opening facing upward and extending horizontally to the left and right, the receiving groove is used to place pipes, the conveying assembly has a processing groove in the middle part in the left-right direction, and the processing groove divides the receiving groove into two parts separated by left and right.

As a preferred embodiment of the present invention, the conveying assembly includes two supporting mechanisms spaced apart from each other on the left and right sides, the two supporting mechanisms enclose the processing groove, the supporting mechanism has a supporting groove extending laterally on the left and right sides, the two supporting grooves on the left and right sides are connected to each other on the left and right sides and constitute the accommodating groove.

As a preferred embodiment of the present invention, the bearing mechanism includes two left and right support plates and at least two left and right bearing rollers horizontally mounted between the two support plates, the bearing groove is formed between two adjacent bearing rollers, and the support plate is provided with a bearing opening corresponding to the bearing groove and open upward.

As a preferred embodiment of the present invention, the load-bearing opening has two front and rear inclined guide surfaces, and the left and right inclined guide surfaces make the load-bearing opening present an opening shape that is larger at the top and smaller at the bottom.

As a preferred embodiment of the present invention, it also includes a rotating assembly arranged above the conveying assembly, the rotating assembly includes a fixed frame, a roller installed on the fixed frame and extending below the fixed frame, and a driving mechanism for driving the roller to rotate, the roller is used to abut against the pipe and drive the pipe to rotate in the receiving groove, and the load-bearing roller can rotate around its own center axis relative to the support plate.

As a preferred embodiment of the present invention, the two rotating components arranged side by side on the left and right form a rotating unit, and the rotating unit is used to drive the same pipe to rotate at the same time. The rotating component on the left is used to drive the part of the pipe located in the supporting mechanism on the left, and the rotating component on the right is used to drive the part of the pipe located in the supporting mechanism on the right.

As a preferred embodiment of the present invention, a circle of buffer grooves is circumferentially provided on the bearing roller at a position corresponding to the roller.

As a preferred embodiment of the present invention, the bearing mechanism includes three bearing rollers that are evenly spaced and arranged side by side to form two bearing grooves.

As a preferred embodiment of the present invention, the rotating assembly also includes an extrusion mechanism, which includes a push rod installed on the fixed frame and capable of moving up and down, and a compression spring, one end of the compression spring is connected to the lower end of the push rod and the other end is connected to the fixed plate, and the roller is used to simultaneously abut against two pipes located on the same supporting mechanism.

As a preferred embodiment of the present invention, the fixed frame extends in the front-to-back direction, and a plurality of the extrusion mechanisms are arranged on the fixed frame at intervals in the front-to-back direction, and each of the extrusion mechanisms is provided with the roller; the rotating assembly also includes a transmission belt and two front and rear transmission wheels forming a circle, the transmission wheels support the transmission belt and can drive the transmission belt to circulate, the rollers all abut against the transmission belt, the transmission belt is used to block between the roller and the pipe, and the driving mechanism drives the transmission belt to circulate by driving the transmission wheel to rotate.

Beneficial effects:

The conveying component has the accommodating groove for placing the pipe fittings horizontally on the left and right sides, so that the axial direction of the pipe fittings is consistent with the extension direction of the accommodating groove, ensuring that the pipe fittings are placed on the conveying component stably and reliably, making it less likely for the pipe fittings to be positionally shifted during subsequent processing; in addition, after the pipe fittings are placed in the accommodating groove, due to the existence of the processing groove, the middle part of the pipe fittings is suspended above the processing groove, that is, the middle part of the pipe fittings to be processed does not contact the body of the conveying component, which can avoid the interference of the physical structure of the conveying component on the processing of the pipe fittings during subsequent processing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the pipe heating and stretching tool;

FIG2 is a schematic diagram showing the positional relationship between the heating device and the conveying device;

FIG3 is a schematic structural diagram of the mounting support plate;

FIG4 is a side view of the pipette cutting and forming device;

FIG5 is a top view of the pipette cutting and forming device;

FIG6 is a schematic diagram of the rotating assembly;

FIG7 is a schematic diagram of the overall structure of the conveying device;

FIG8 is a schematic diagram of the conveying assembly;

FIG9 is a schematic structural diagram of the carrying mechanism;

FIG10 is a side view of the carrying mechanism;

FIG11 is a schematic diagram of the overall structure of the rotating assembly;

FIG12 is a schematic diagram of the overall structure of the stretching device;

FIG13 is a schematic diagram of the structure of the mobile assembly;

FIG14 is a schematic structural diagram of the clamping assembly;

FIG15 is a schematic diagram of the support plate;

FIG. 16 is a schematic diagram of the clamping mechanism.

DETAILED DESCRIPTION

The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Embodiment 1:

The present invention discloses a pipe heating and stretching tool, comprising a platform a, a conveying device b arranged on the platform a, a heating device c arranged above the conveying device b, a stretching device d and a cooling and forming device e. The conveying device b is used for placing pipes horizontally left and right and conveying the pipes in the front-back direction. The pipes are straight pipes that have been processed and formed. After the pipes are placed on the conveying device b, the middle part of the pipes corresponds to the middle part of the conveying device b in the left-right direction, and the middle part is exactly the part of the pipe that needs to be heated and stretched. Therefore, the heating device c is aligned with the middle part of the conveying device b in the left-right direction, so that the middle part of the pipe can be aligned and heated. After the heating process is completed, the conveying device b is required to continue to convey the pipe forward to the workstation where the stretching device d is located, and the stretching device d stretches the pipe to both sides at the same time, so that the heated part in the middle of the pipe is elongated to form the required shape; after the above process is completed, the pipe has not yet been cooled and formed, so the stretching device d also needs to keep the pipe in a stretched state, and the cooling and forming device e cools and forms the middle part of the pipe. After the cooling and forming process is completed, the stretching device d stops working and releases the clamping of the pipe. Therefore, in the front-to-back direction, the cooling and forming device e and the stretching device d in this embodiment are at the same workstation, the stretching device d acts on the left and right ends of the pipe, and the cooling and forming device e acts on the middle part of the pipe, so the cooling and forming device e is aligned with the middle part of the conveying device b in the left-right direction and is used to cool the middle part of the pipe. In the front-to-back direction, the heating device c is located behind the cooling and forming device e, so that the processing sequence of the above pipe can be met. The pipe heating and stretching tool of this embodiment can realize the local processing and forming of the middle part of the pipe, and does not need to process and form the entire pipe, which has low cost and high processing efficiency. Especially when used to process the pipe into a pipette, after the middle part of the pipe is stretched and formed, the overall shape of the pipe diameter changes from large to small and then from small to large, can be regarded as two pointed mouths spliced top to top. As long as the pipe is cut in the middle, the pipe is cut in half into two pieces, and two pipettes with pointed mouths are formed. Therefore, the pipe heating and stretching tool of this embodiment can complete the manufacturing and forming of the pointed mouth by local heating and stretching of an ordinary straight pipe. The local processing cost is low and the efficiency is high. It forms a whole that can be divided into two pipettes, which also improves the overall production efficiency of the pipette.

The heating of the pipe fitting needs to reach a relatively high temperature so that the middle part of the pipe fitting can reach the degree that it can be stretched and formed. Usually, a tool such as a currently commonly used heat melter 51 is used. However, since the pipe fitting is locally heated in this embodiment, while ensuring that the middle part of the pipe fitting is fully hot-melted, it is also necessary to prevent heat from being transferred to other parts of the pipe fitting to prevent other parts of the pipe fitting from being hot-melted. Otherwise, the pipe fitting will be greatly deformed in the subsequent stretching process, resulting in defective products. Therefore, the heating device c of this embodiment includes a heat melter 51, a mounting support plate 52 and a mounting joint 53. The mounting support plate 52 is provided with a heating channel 54 which passes through from top to bottom. The mounting joint 53 is fixed on the upper surface of the mounting support plate 52 and is connected to the heating channel 54. The heat melter 51 is mounted and fixed on the mounting joint 53 and can transfer heat downward through the heating channel 54. In this way, the heating channel 54 has a conduction effect on the heat emitted by the heat melter 51. As long as the heating channel 54 is directly aligned downward with the middle part of the conveying device b in the left and right directions, the conveying device b transports the pipe to the bottom of the heating channel 54. The heating device c can accurately heat the middle part of the pipe and concentrate the heat on the middle part of the pipe, which not only saves energy costs and improves the efficiency of pipe heating, but also avoids hot melting in other parts of the pipe and reduces the defective rate.

In order to improve the processing efficiency, the conveying device b in this embodiment conveys the pipe fittings continuously, that is, after one conveying stops, some pipe fittings arrive at the heating station, and some heated pipe fittings arrive at the cooling and forming station, and the heating process, stretching and cooling and forming process are carried out simultaneously, and then the second conveying is carried out, the new pipe fittings are transported to the heating station, the pipe fittings on the heating station are transported to the cooling and forming station, and the pipe fittings on the cooling and forming station are transported forward to the next process, and so on, so as to realize the assembly line production and improve the production efficiency. To realize the above production process, the time that the pipe fittings stay in each process is the same, and the length of the stay time depends on the longest one in the processing process. If this process is not completed, even if the other processes are completed, they need to stop in place and wait for this process to be completed, and then they can be transported by the conveying device b together, which greatly affects the production efficiency. In this embodiment, experiments show that the time required for the heating process is longer than that for the cooling and forming process. Therefore, in this embodiment, the mounting support plate 52 preferably extends in the front-to-back direction, and a plurality of mounting joints 53 are evenly spaced on the mounting support plate 52 in the front-to-back direction. Each mounting joint 53 is connected to the heat melter 51, and the heating process is divided into multiple heatings. The total duration of the heating process is also divided into multiple parts, so that the duration of each heating is consistent and consistent with the duration of the stretching and cooling forming processes. This can avoid the situation where any process has to wait for other processes to be completed, realize continuous processing, and effectively improve production efficiency. The pipe fitting needs to undergo each heating to reach the required degree of hot melting, complete the heating process, and enter the subsequent stretching and cooling forming processes.

After the heating process is divided into multiple heating processes, the pipe is located under the first heating channel 54 after one transportation, under the second heating channel 54 after the second transportation, and under the third heating channel 54 after the third transportation. It is not heated during the transportation process, and the heating is interrupted. Moreover, after entering the next heating channel 54, the instantaneous effect of the heat fuser 51 reheating the pipe is inferior to the uninterrupted continuous heating, which will cause the total duration of the entire heating process to be longer. Therefore, in this embodiment, the heating device c preferably also includes a heating head 55 fixed on the lower surface of the mounting support plate 52 and corresponding to the heating channel 54. The heating head 55 is surrounded by a cavity that is through and connected to the heating channel 54. The heating head 55 has a gathering effect on the heat transferred downward, reduces the diffusion of heat to the surroundings, and transfers as much heat as possible downward to the pipe, thereby improving the heating efficiency and shortening the total duration of the heating process, thereby improving production efficiency. As a further improvement, it is preferred that the temperature at each heating head 55 in the heating device c is consistent to ensure heating efficiency and at the same time ensure that the pipe reaches a more precise degree of hot melting.

After the pipe has completed the heating process, it enters the stretching process to complete the stretching. Specifically, the stretching device d includes two left and right clamping components 6 and a moving component 7 that can drive the clamping component 6 to move left and right. When the pipe arrives at the stretching station, the left clamping component 6 clamps the left end of the pipe, and the right clamping component 6 clamps the right end of the pipe. Then the moving component 7 simultaneously drives the left and right clamping components 6 to move back to each other to the same distance, stretching the heated part in the middle of the pipe to form two symmetrical pointed mouths, so that the left and right pointed mouths are as symmetrical as possible to ensure product quality. In addition, the middle part of the pipe is still in the middle part of the conveying device b in the left and right directions, preparing for the subsequent cooling and molding process. After the pipe is stretched, the middle part of the pipe has not yet been cooled and formed, so the stretching device d needs to be kept in the stretched state of the pipe during the entire cooling and forming process to avoid other deformations of the pipe; and the cooling and forming device e in this embodiment includes an air jet pipe e2 with an air nozzle e1, and the air jet pipe e2 can spray cooling air through the air nozzle e1, and the air nozzle e1 is located between the left and right clamping components 6 and points to the middle part of the conveying device b in the left and right directions. In this way, when the pipe is transported to this station, the air nozzle e1 can aim at the middle part of the pipe to spray air, so that the middle part of the pipe can be quickly cooled and formed.

According to the above processing steps, the pipe fittings need to be kept in a horizontal position at all times, so that the middle part of the pipe fittings is always located in the middle part of the conveying device b in the left-right direction, which is convenient for processing the middle part of the pipe fittings. Therefore, in this embodiment, the conveying device b preferably includes a conveyor belt 1 and a conveying assembly 2 evenly spaced and installed side by side on the transmission belt 45 in the front-to-back direction, and the conveying assembly 2 has a receiving groove 21 extending horizontally from left to right, and the receiving groove 21 is used to place the pipe fittings horizontally from left to right. In this embodiment, in the front-to-back direction, the spacing between two adjacent heating channels 54 is consistent, and the spacing between the last heating channel 54 and the air nozzle e1 of the air injection pipe e2 is also consistent, and the conveying assemblies 2 in the conveying device b are evenly spaced. When one of the conveying assemblies 2 is located directly below a heating channel 54, the adjacent conveying assembly 2 is located directly below the adjacent heating channel 54 or directly below the adjacent air nozzle e1. In short, in the short-term processing stage after each transportation, there is a conveying assembly 2 under each heating channel 54 and the air nozzle e1, so as to achieve continuous processing and improve production efficiency.

In the heating process, if the pipe fitting remains stationary on the conveying device b, the heating device c can only heat the upward side of the pipe fitting, and the downward side of the pipe fitting is not heated effectively, resulting in an increase in the total heating process time, affecting production efficiency, and may cause uneven heating in the middle part of the pipe fitting, resulting in uneven circumferential heating of the subsequent stretched and formed part, resulting in defective products. Therefore, in this embodiment, the conveying device b preferably also includes a rotating component 4 located above the conveying component 2, and the rotating component 4 includes a roller 41 and a driving mechanism 43 that drives the roller 41 to rotate, and the roller 41 is used to abut against the pipe fitting. When the driving mechanism 43 drives the roller 41 to rotate, the roller 41 can drive the pipe fitting to rotate in the receiving groove 21. Therefore, the roller 41 in the rotating assembly 4 is set on the heating station. When the pipe is transported to the heating station, the roller 41 abuts against the pipe and drives the pipe to rotate. At this time, the heating device c can heat the pipe uniformly in the circumferential direction, which not only improves the quality of subsequent pipe stretching by ensuring uniform heating effect, but also reduces the duration of the heating process and improves production efficiency.

After the pipe fitting is heated, stretched and cooled in the pipe fitting heating and stretching tooling, two symmetrical and integrated pointed mouths are formed in the middle part, that is, two symmetrical pipettes on the left and right have been formed. At this time, it is necessary to split the pipe fitting in the middle of the two pointed mouths, and cut the pipe fitting into two pipettes in half on the left and right to obtain the final finished pipette. Therefore, a pipette cutting and forming device of the present invention includes the pipe fitting heating and stretching tooling, and also includes a cutting assembly 8 arranged above the conveying device b, and the cutting assembly 8 is located in front of the cooling and forming device e, that is, the pipe fitting is transported to the bottom of the cutting assembly 8 after cooling and forming, and the cutting assembly 8 includes a lifting mechanism 81, a tool holder 82 installed on the lifting mechanism 81, and a tool 83 installed on the tool holder 82, and the lifting mechanism 81 can drive the tool holder 82 to move up and down. When the pipe fitting is located below the cutting assembly 8, the lifting mechanism 81 drives the tool holder 82 to move downward, so that the tool 83 cuts the pipe fitting to obtain two pipettes. However, it takes a lot of pressure for the tool 83 to directly squeeze downward and cut the pipe. During this process, the pipe may be deformed or even broken. Therefore, the cutting component 8 can also be used in conjunction with the rotating component 4, that is, the rotating component 4 is set on the cutting station, and the rotating component 4 is started during the cutting process to drive the pipe to rotate. In this case, the tool 83 does not need to have a large cutting depth on the pipe. The tool 83 only needs to cut into the wall thickness of the pipe. The tool 83 can complete a circle of cutting on the pipe through the rotation of the pipe, so that the pipe can be cut off, reducing the difficulty of cutting. The tool 83 does not need to have a large squeezing force on the pipe, thereby improving the stability of the pipe during cutting.

The conveying device b in the first embodiment adopts the specific implementation of the second embodiment described below, and the stretching device d in the first embodiment adopts the specific implementation of the third embodiment described below.

Embodiment 2:

The present invention provides a pipe conveying device, comprising a conveyor belt 1 and a conveying assembly 2 installed side by side on the conveyor belt 1 in the front-to-back direction, wherein the conveying assembly 2 has a receiving groove 21 with an opening facing upward and extending horizontally from left to right, wherein the receiving groove 21 is used to place pipes, and the conveying assembly 2 has a processing groove 22 in the middle part in the left-right direction, wherein the processing groove 22 divides the receiving groove 21 into two parts spaced apart from each other. The conveying device of this embodiment is mainly used to convey pipes on a processing production line, and the middle part of the conveyed pipes needs to be processed, for example, in the first embodiment, the processing of the middle part of the pipes is coordinated while conveying the pipes. Therefore, the conveying component 2 of this embodiment has the accommodating groove 21 for placing the pipe fittings horizontally on the left and right sides, so that the axial direction of the pipe fittings is consistent with the extension direction of the accommodating groove 21, ensuring that the pipe fittings are placed stably and reliably on the conveying component 2, so that the pipe fittings are not easily displaced during subsequent processing; in addition, after the pipe fittings are placed in the accommodating groove 21, due to the existence of the processing groove 22, the middle part of the pipe fittings is suspended above the processing groove 22, that is, the middle part of the pipe fittings to be processed does not contact the main body of the conveying component 2, which can avoid the interference of the physical structure of the conveying component 2 on the processing of the pipe fittings during subsequent processing, especially in the pipe fitting heating and stretching forming process as in Example 1. When the middle part of the pipe fittings is hot-melted, any contact between the remaining components and this part will affect the forming effect of this part, resulting in defective products. The existence of the processing groove 22 in this embodiment avoids the occurrence of the above situation and effectively ensures the processing quality of the pipe fittings.

If the conveying assembly 2 is a complete whole in structure, the cost of opening the processing groove 22 in the middle thereof is high. Therefore, in this embodiment, the conveying assembly 2 preferably includes two bearing mechanisms 3 arranged at intervals on the left and right, and the processing groove 22 is surrounded by the two bearing mechanisms 3. The bearing mechanism 3 has a bearing groove 31 extending horizontally on the left and right sides. The two bearing grooves 31 on the left and right sides are connected to each other and constitute the receiving groove 21, that is, the receiving groove 21 is divided into two bearing grooves 31 on the left and right sides by the processing groove 22, but the two bearing grooves 31 on the left and right sides are still connected to each other in space, which satisfies the placement of pipe fittings. The processing groove 22 is naturally formed at the middle interval between the left and right bearing mechanisms 3, and does not need to be specially processed to reduce the manufacturing cost of the processing groove 22. In addition, the left and right bearing mechanisms 3 are independent individuals, and there is no physical structure of the conveying assembly 2 at the position of the processing groove 22, so the manufacturing cost of the conveying assembly 2 itself is also reduced; in addition, when any bearing mechanism 3 in the same conveying assembly 2 is damaged, fails, etc. and needs to be replaced, only the damaged or failed bearing mechanism 3 needs to be replaced, and the other bearing mechanism 3 does not need to be replaced, which reduces the maintenance cost.

The bearing mechanism 3 includes two left and right support plates 32 and at least two left and right bearing rollers 33 horizontally erected between the two support plates 32. The bearing groove 31 is formed between two adjacent bearing rollers 33. The support plate 32 is provided with a bearing opening 321 corresponding to the bearing groove 31 and open upward. When the pipe is placed in the accommodating groove 21, a part of the left side of the pipe is located in the bearing groove 31 on the left, and a part of the right side of the pipe is located in the bearing groove 31 on the right. The bearing roller 33 is cylindrical and the pipe is a circular straight pipe, so the contact between the pipe and the bearing roller 33 is a line contact tangent to two circular surfaces, which reduces the contact area between the pipe and the conveying component 2 as much as possible, reduces the wear of the bearing roller 33 on the surface of the pipe, and provides convenience for the self-rotation of the pipe that may occur in subsequent processing. In actual processing, the lengths of pipes vary. If the pipes are long, the left and right ends of the pipes need to extend outside the bearing mechanism 3, that is, the bearing mechanism 3 actually only directly supports the portion between the left and right ends and the middle portion of the pipes. Therefore, the support plate 32 of this embodiment is provided with the bearing port 321, and the pipes can extend from the bearing port 321 outside the bearing mechanism 3, so that the conveying assembly 2 can be used to transport pipes of different lengths. There are two links of loading and unloading of pipes on the conveying device. In this embodiment, the bearing port 321 preferably has two front and rear inclined guide surfaces 322. The left and right inclined guide surfaces 322 make the bearing port 321 have an opening shape with a larger top and a smaller bottom. In this way, no matter how the loading and unloading is performed, it is convenient for the pipes to fall into the receiving groove 21, and it is also convenient for the pipes to leave the receiving groove 21, thereby improving the efficiency of loading and unloading. In addition, the support plate 32 in this embodiment is the boundary of the supporting mechanism 3. The two spaced support plates 32 on the left and right surround the processing groove 22 and separate the processing groove 22 from the supporting roller 33. Therefore, in the subsequent heating process, the support plate 32 can block the heat, thereby preventing the supporting roller 33 from being heated for a long time and causing its service life to be reduced, and even preventing the supporting roller 33 from partially melting. In actual implementation, the support plate 32 is made of metal, and the supporting roller 33 is made of plastic, nylon or other materials.

The conveying device of this embodiment transports pipe fittings to achieve assembly line-style high-efficiency processing and manufacturing, but in certain processes, such as the process of heating the pipe fittings in Example 1, in order to achieve balanced and efficient heating, the pipe fittings need to be able to rotate. To meet the above requirements, the present embodiment preferably also includes a rotating assembly 4 arranged above the conveying assembly 2, the rotating assembly 4 including a fixed frame 42, a roller 41 mounted on the fixed frame 42 and extending below the fixed frame 42, and a driving mechanism 43 for driving the roller 41 to rotate, the roller 41 is used to abut against the pipe fitting and drive the pipe fitting to rotate in the accommodating groove 21, the bearing roller 33 can rotate around its own center axis relative to the support plate 32, the roller 41 is arranged above the workstation where the pipe fitting needs to rotate, when the pipe fitting is transported to this workstation, the roller 41 abuts against the pipe fitting and presses the pipe fitting on the bearing roller 33, the driving mechanism 43 drives the roller 41 to rotate, and the pipe fitting can be driven to rotate around its own axis in the bearing groove 31 through rolling friction, and at the same time, the bearing roller 33 also rotates around its own center axis under the action of rolling friction, so that the pipe fitting can rotate smoothly and cooperate with the processing of the pipe fitting. The bearing roller 33 and the pipe are in tangent line contact between the circular surfaces, which reduces the resistance of the pipe to self-rotation and facilitates the self-rotation of the pipe. The pipe placed on the conveying assembly 2 is partially on the bearing mechanism 3, and partially in a suspended state. If the roller 41 abuts against the suspended part of the pipe, it may cause a more obvious compression deformation of the pipe, and may even cause the overall position of the pipe to shift. Therefore, the roller 41 is arranged above the bearing mechanism 3, so that the part of the pipe abutted by the roller 41 also abuts against the bearing mechanism 3, and the pipe is in a stable placement state as a whole, and it will not cause a more obvious bending deformation of the pipe. Further, it is preferred that the two rotating assemblies 4 arranged side by side on the left and right form a rotating unit, and the rotating unit is used to drive the same pipe to rotate at the same time. The rotating assembly 4 on the left is used to drive the part of the pipe located in the bearing mechanism 3 on the left, and the rotating assembly 4 on the right is used to drive the part of the pipe located in the bearing mechanism 3 on the right, so as to further improve the overall stability of the pipe during self-rotation. However, the roller 41 abuts against the pipe at a single point. Although the roller 41 abuts against the left and right points of the same pipe in the above scheme, the pressure between the pipe part at these two points and the bearing roller 33 is relatively large, resulting in relatively large friction, while the pressure and friction between other parts and the bearing roller 33 are relatively small. It is difficult to drive the pipe and the bearing roller 33 to rotate at the same time by relying solely on two points with relatively large friction. It is very likely that the bearing roller 33 cannot be driven to rotate, and the pipe may also be unable to rotate at this time. Even if the pipe can rotate, there is sliding friction between the outer surface of the pipe and the bearing roller 33, causing serious wear on the outer surface of the pipe. In order to avoid the above situation, in this embodiment, a circle of buffer grooves 331 are preferably provided in the circumferential direction at the portion of the bearing roller 33 corresponding to the roller 41. The width of the buffer grooves 331 in the left-right direction is small. When the roller 41 abuts against the pipe fitting, the abutted portion of the pipe fitting is slightly pressed into the buffer groove 331, and the pipe fitting undergoes slight local deformation. However, the left and right portions of the pipe fitting located on the left and right sides of the abutted portion will be pressed downward and abut against the bearing roller 33. The left and right portions are the longer portions in the left-right direction. The pressure between the pipe and the supporting roller 33 is also relatively large, and the rolling friction is also relatively large; compared with the original scheme in which only the two points on the pipe that are abutted by the roller 41 have a relatively large pressure between them and the supporting roller 33, in this improved scheme, the longer continuous parts on both sides of the two points on the pipe that are abutted by the roller 41 have a relatively large pressure between them and the supporting roller 33, thereby increasing the rolling friction between the entire pipe and the supporting roller 33, ensuring that under the drive of the roller 41, the supporting roller 33 can rotate together with the pipe, thereby ensuring that the pipe can rotate smoothly.

The conveying components 2 are arranged at intervals along the front-to-back direction, and each conveying component 2 is placed on a pipe. When the conveying device is used on a processing production line, the conveyor belt 1 simultaneously transports each conveying component 2 forward, allowing each conveying component 2 to pass through each processing station in turn, so that each pipe placed on each conveying component 2 undergoes the entire processing process completely. Therefore, in order to meet efficient processing, the processing stations on the production line are usually arranged at even intervals, that is, each time the conveyor belt 1 stops briefly, a conveying component 2 stays under each processing station. Therefore, the conveying components 2 in this embodiment are also arranged at even intervals in the front-to-back direction. In order to further improve efficiency, the bearing mechanism 3 in this embodiment preferably includes three bearing rollers 33 that are evenly spaced and arranged side by side to form two bearing grooves 31, so that the bearing assembly composed of the left and right bearing mechanisms 3 can place two pipes at a time, and these two pipes undergo processing synchronously, effectively improving processing efficiency. In this case, the two pipes on the same conveying assembly 2 are close to each other. If each pipe needs a separate roller 41 to drive the rotation, the cost will increase, and the two rollers 41 on the same station are too close to each other. When designing, it is also necessary to avoid mutual interference during assembly and operation, which will introduce many new problems. Therefore, in this embodiment, it is preferred to use a roller 41 to simultaneously drive the rotation of two pipes placed on the same bearing mechanism 3, so that the roller 41 needs to be located directly above the middle of the two bearing grooves 31 on the bearing mechanism 3, and the roller 41 can abut against the two pipes at the same time; but in this case, a part of the roller 41 extends into the space between the two pipes to achieve simultaneous abutment against the two pipes, that is, the lowest point of the roller 41 is lower than the highest point of the pipe, so that when the conveying assembly 2 drives the pipe to enter or leave the station, the roller 41 needs to move upward as a whole to avoid blocking the pipe. Therefore, in this embodiment, the rotating assembly 4 preferably further includes a squeezing mechanism 44, which includes a push rod 441 and a compression spring 442 mounted on the fixing frame 42 and capable of moving up and down, wherein one end of the compression spring 442 is connected to the lower end of the push rod 441 and the other end is connected to the fixing plate, and the roller 41 is used to simultaneously abut against two pipes located on the same bearing mechanism 3. When the roller 41 abuts against the pipe, the push rod 441 is pushed downward by the upward and downward force of the compression spring 442, thereby achieving a greater pressure abutment of the roller 41 against the pipe, and when the conveying assembly 2 drives the pipe to enter or leave the station together, one of the pipes squeezes the roller 41 upward during the movement, the compression spring 442 is compressed, and the push rod 441 is pushed upward. In short, the pipe eliminates the obstruction of the roller 41 by squeezing the roller 41 away.

Since there are usually multiple stations on the production line where pipes need to be rotated, rollers 41 need to be installed at these stations. If each roller 41 operates independently, each roller 41 needs to be equipped with a driving mechanism 43, which is too costly. Therefore, in this embodiment, the fixing frame 42 preferably extends in the front-to-back direction, and a plurality of the squeezing mechanisms 44 are arranged at intervals in the front-to-back direction on the fixing frame 42, and each squeezing mechanism 44 is provided with the roller 41; the rotating assembly 4 also includes a transmission belt 45 and two front and rear transmission wheels 46 that are arranged in a circle, and the transmission wheels 46 support the transmission belt 45 and can drive the transmission belt 45 to circulate, and the rollers 41 are all against the transmission belt 45, and the transmission belt 45 is used to block between the rollers 41 and the pipe fittings, and the driving mechanism 43 drives the transmission belt 45 to circulate by driving the transmission wheel 46 to rotate, and the transmission belt 45 can drive all the rollers 41 to rotate at the same time, which effectively saves the cost of the driving mechanism 43, and further improves the consistency of the rotation speed of all the rollers 41, thereby improving the processing effect. In addition, the conveyor belt 1 can be made of a soft material with a large friction coefficient to reduce the difficulty of driving the pipe fittings to rotate.

Embodiment three:

The present invention discloses a stretching device for hot-drawing of pipe fittings, comprising two symmetrically arranged left and right clamping assemblies 6 and a moving assembly 7 capable of driving the clamping assemblies 6 to move left and right, wherein the clamping assemblies 6 comprise a clamping mechanism 61 and an opening and closing mechanism 62, wherein the clamping mechanism 61 is used to clamp the pipe fitting, and the opening and closing mechanism 62 can drive the clamping mechanism 61 to open and close. The stretching device of this embodiment is mainly for pipe fittings placed horizontally on the left and right sides. When stretching the pipe fittings, the left end of the pipe fitting is clamped by the clamping assembly 6 on the left side, and the right end of the pipe fitting is clamped by the clamping assembly 6 on the right side, and then the moving assembly 7 is used to push one or two clamping assemblies 6 to move to increase the spacing between the two clamping assemblies 6, thereby achieving the stretching of the pipe fittings. In this embodiment, the left and right clamping assemblies 6 clamp the pipe fittings at the same time. For the pipe fittings, the clamping conditions on the left and right sides are the same, and stretching on any side can achieve the expected stretching effect, and the moving assembly 7 can also simultaneously push the two clamping assemblies 6 to achieve bidirectional stretching of the pipe fittings, thereby improving the stretching efficiency. In the preferred scheme of this embodiment, the moving component 7 can simultaneously drive the left and right clamping components 6 to move in opposite directions to achieve efficient stretching; and the stretched and formed part of the pipe can achieve a symmetrical and consistent stretching effect on both sides as much as possible, thereby improving the stretching quality; in addition, although the stretched part of the pipe is elongated as a whole, it is still roughly in its original position when viewed from the left and right directions. After this part moves in the front and back directions and undergoes subsequent processing, no additional position adjustment is required. For example, the stretching device is used in the production of the pipette in Example 1. After the middle part of the pipe is stretched in both directions at the same time, this part is still in the middle part of the conveying device in the left and right directions as a whole, which does not affect the alignment of subsequent processing stations and can also improve the overall production efficiency.

In this embodiment, the moving assembly 7 includes a guide mounting rod 71 and a first cylinder 72 which are arranged laterally on the left and right sides. The guide mounting rod 71 is used to install the clamping assembly 6. The first cylinder 72 is connected to the clamping assembly 6 and can push the clamping assembly 6 to move along the guide mounting rod 71. The guide mounting rod 71 defines the moving path of the clamping assembly 6. The machining accuracy of the guide mounting rod 71 itself and the installation position accuracy can be easily achieved to a high degree. Therefore, the moving path accuracy of the clamping assembly 6 is relatively high, and the stretching direction accuracy during stretching of the pipe is relatively high, which further improves the stretching quality. The first cylinder 72 adopts a commonly used cylinder form, has a large output force, and a fast pushing speed for the clamping assembly 6, thereby increasing the stretching speed of the pipe and improving the machining efficiency. In addition, the cylinder also has the advantages of strong adaptability and convenient installation and maintenance. The first cylinder 72 pushes the clamping assembly 6 at a fast speed, and each push stroke can be regarded as an emergency stop. The main part of the clamping assembly 6 is usually a steel structure, which is heavy and has a large inertia during an emergency stop, which affects the overall stability. In addition, during an emergency stop, the force of the first cylinder 72 on the clamping assembly 6 suddenly changes from a thrust to a pull, and the burden of the first cylinder 72 is heavy. Therefore, in this embodiment, the moving assembly 7 preferably also includes a buffer mechanism 73, and the buffer mechanism 73 includes a baffle 731 fixed on the guide mounting rod 71 and a corrugated buffer hose 732 sleeved on the guide mounting rod 71. One end of the corrugated buffer hose 732 abuts against the baffle 731 and the other end is abutted by the clamping assembly 6. Before the clamping assembly 6 stops, it abuts against the corrugated buffer hose 732. The resistance of the corrugated buffer hose 732 to the clamping assembly 6 can improve the stability of the clamping assembly 6 when it stops. In this embodiment, the opposite movement of the clamping assembly 6 is achieved by the movement assembly 7. After the stretching is completed, the clamping assembly 6 moves toward each other and returns to the initial position without the need for the first cylinder 72 to push it. After the first cylinder 72 is depressurized, the clamping assembly 6 moves and resets. Therefore, the above-mentioned emergency stop phenomenon is mainly for the situation where the clamping assembly 6 moves away from each other. Therefore, for the clamping assembly 6 on the left, the buffer mechanism 73 is arranged on its left side, and for the clamping assembly 6 on the right, the buffer mechanism 73 is arranged on its right side.

In this embodiment, the clamping assembly 6 further includes a fixed slider 63 and a support plate 64. The fixed slider 63 is mounted on the guide mounting rod 71 and can move along the guide mounting rod 71. The upper end of the support plate 64 is fixed on the fixed slider 63 and the lower end is fixedly connected to the opening and closing mechanism 62. The clamping mechanism 61 is fixedly connected to the opening and closing mechanism 62. The clamping assembly 6 is specifically matched with the guide mounting rod 71 through the fixed slider 63 to achieve a stable connection between the clamping assembly 6 as a whole and the guide mounting rod 71. The support plate 64 facilitates the installation of the opening and closing mechanism 62 and the clamping mechanism 61. The support plate 64 is an integrally formed structure, which is reliable and will not be easily deformed. Therefore, the support plate 64 itself has little effect on the position accuracy of the clamping mechanism 61. It is mainly the installation accuracy between the support plate 64 and the fixed slider 63 that affects the position accuracy of the clamping mechanism 61. Therefore, in this embodiment, the support plate 64 preferably includes an upper fixing portion 641, a lower fixing portion 642 and a connecting portion 643 located between the upper fixing portion 641 and the lower fixing portion 642, the upper fixing portion 641 is a straight plate structure extending in the vertical direction and having two left and right vertical outer walls, the fixed slider 63 is provided with a mounting groove 631 extending in the vertical direction and having a vertical inner wall, the upper fixing portion 641 is fixedly installed in the mounting groove 631, and the vertical outer wall and the vertical inner wall are abutted against each other, and the upper fixing portion 641 is assembled in the mounting groove 631 to ensure that the upper fixing portion 641 will not easily produce a position deviation relative to the fixed slider 63, thereby improving the overall position accuracy of the support plate 64 relative to the fixed slider 63, thereby ensuring the position accuracy of the clamping mechanism and further ensuring the stretching quality.

As a further improvement, the connecting portion 643 is preferably a straight plate structure extending in the left-right direction, one end of the connecting portion 643 in the left-right direction is connected to the upper fixing portion 641 and the other end is connected to the lower fixing portion 642, the fixing portion is located above the connecting portion 643, and the lower fixing portion 642 is located below the connecting portion 643. By bending the supporting plate 64 twice as a whole, the length of the supporting plate 64 as a whole in the vertical direction is shortened, and the space occupied in the vertical direction is reduced; and the extending direction of the connecting portion 643 is consistent with the moving direction of the clamping assembly 6, which has a better effect on the force transmission effect; in addition, the structural strength of the supporting plate 64 itself is also improved. The clamping mechanism 61 in this embodiment includes a guide plate 611 and two upper and lower clamping plates 612. A guide groove 613 is provided on the guide plate 611 in the vertical direction. One end of the clamping plate 612 is mounted on the guide plate 611 and can move along the guide groove 613. The opening and closing mechanism 62 pushes the clamping plates 612 to move toward and away from each other to achieve opening and closing. When the stretching device is used in the first embodiment, two pipes are placed on one conveying assembly 2 at the same time. The clamping plate 612 can clamp the two pipes at the same time by moving up and down, so as to achieve simultaneous stretching and forming of the two pipes, and cooperate with the conveying assembly 2 to improve the processing efficiency. The opening and closing mechanism 62 includes a second cylinder fixed on the lower fixing part 642. The guide plate 611 is mounted on the second cylinder. The second cylinder is connected to the clamping plate 612 and can drive the clamping plate 612 to move along the guide groove 613, taking advantage of the large output force and fast pushing speed of the cylinder to improve the stretching efficiency.

As a further improvement, the clamping mechanism 61 preferably further includes a clamping head 614 fixed on the clamping plate 612, the upper and lower clamping heads 614 are symmetrical and arranged facing each other, a clamping pad 615 is fixed on the clamping head 614, an arc clamping groove 616 is provided on the clamping pad 615, and the arc clamping grooves 616 on the upper and lower clamping pads 615 correspond to each other. By clamping the pipe by two clamping heads 614, the clamping plate 612 needs to be moved less, the cost is reduced, the efficiency is improved, and the force transmission effect is better and the clamping effect is also better. The clamping head 614 and the clamping plate 612 are both steel structures, which facilitates firm fixation between the two, but their friction coefficient is small, resulting in poor clamping effect on the pipe fitting, so the clamping head 614 contacts the pipe fitting through the clamping pad 615. The clamping pad 615 can be made of plastic with a large friction coefficient and a softer texture, which not only improves the clamping force of the clamping head 614 on the pipe fitting, but also reduces the wear of the pipe fitting caused by clamping. The shape of the arc-shaped clamping groove 616 matches the outer contour of the pipe fitting, increases the contact area, and improves the clamping effect.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims (7)

1. A pipe conveying device, characterized in that it comprises a conveyor belt (1) and a conveying assembly (2) installed side by side on the conveyor belt (1) in a front-to-rear direction, the conveying assembly (2) having a receiving groove (21) with an opening facing upward and extending laterally to the left and right, the receiving groove (21) being used to place the pipe, the conveying assembly (2) having a processing groove (22) in the middle portion in the left-right direction, the processing groove (22) dividing the receiving groove (21) into two parts spaced apart from each other on the left and right sides; The conveying assembly (2) comprises two bearing mechanisms (3) arranged at a distance from each other on the left and right, the two bearing mechanisms (3) enclose the processing groove (22), the bearing mechanism (3) has a bearing groove (31) extending laterally on the left and right, the two bearing grooves (31) on the left and right are connected to each other on the left and right and constitute the containing groove (21); The bearing mechanism (3) comprises two left and right support plates (32) and at least two left and right bearing rollers (33) transversely mounted between the two support plates (32); the bearing groove (31) is formed between two adjacent bearing rollers (33); and the support plate (32) is provided with a bearing opening (321) corresponding to the bearing groove (31) and open upwards. The invention also comprises a rotating assembly (4) arranged above the conveying assembly (2), the rotating assembly (4) comprising a fixing frame (42), a roller (41) mounted on the fixing frame (42) and extending below the fixing frame (42), and a driving mechanism (43) for driving the roller (41) to rotate, the roller (41) being used to abut against the pipe and drive the pipe to rotate in the containing groove (21), and the bearing roller (33) being able to rotate around its own central axis relative to the supporting plate (32). 2. A pipe conveying device according to claim 1, characterized in that the load-bearing opening (321) has two front and rear inclined guide surfaces (322), and the two left and right inclined guide surfaces (322) make the load-bearing opening (321) present an opening shape that is larger at the top and smaller at the bottom. 3. A pipe conveying device according to claim 1, characterized in that the two rotating assemblies (4) arranged side by side on the left and right form a rotating unit, and the rotating unit is used to drive the same pipe to rotate at the same time, the rotating assembly (4) on the left is used to drive the part of the pipe located in the supporting mechanism (3) on the left, and the rotating assembly (4) on the right is used to drive the part of the pipe located in the supporting mechanism (3) on the right. 4. A pipe conveying device according to claim 3, characterized in that a circle of buffer grooves (331) are provided along the circumferential direction at a portion of the bearing roller (33) corresponding to the roller (41). 5. A pipe conveying device according to claim 4, characterized in that the bearing mechanism (3) comprises three bearing rollers (33) evenly spaced and arranged side by side to form two bearing grooves (31). 6. A pipe conveying device according to claim 5, characterized in that the rotating assembly (4) further includes a squeezing mechanism (44), the squeezing mechanism (44) includes a push rod (441) installed on the fixed frame (42) and capable of moving up and down, and a compression spring (442), one end of the compression spring (442) is connected to the lower end of the push rod (441) and the other end is connected to the fixed frame (42), and the roller (41) is used to simultaneously abut against two pipes located on the same supporting mechanism (3). 7. A pipe conveying device according to claim 6, characterized in that the fixed frame (42) extends in the front-to-back direction, and a plurality of the squeezing mechanisms (44) are arranged on the fixed frame (42) at intervals in the front-to-back direction, and each of the squeezing mechanisms (44) is provided with the roller (41); the rotating assembly (4) also includes a transmission belt (45) and two front and rear transmission wheels (46) that form a circle, the transmission wheel (46) supports the transmission belt (45) and can drive the transmission belt (45) to circulate, the rollers (41) are all against the transmission belt (45), the transmission belt (45) is used to block between the roller (41) and the pipe, and the driving mechanism (43) drives the transmission belt (45) to circulate by driving the transmission wheel (46) to rotate.