Pipe Fitting Marking and Screening Device

Abstract

The present invention relates to the technical field of pipe processing, and discloses a pipe marking and sorting device, comprising a first conveyor belt and a feeding unit, wherein the feeding unit can convey elbows to the first conveyor belt, a guide channel is provided above the first conveyor belt, a straightening and tilting unit is provided on the guide channel, the straightening and tilting unit can tilt the elbows into a ∧ shape, a marking unit and a counting unit are provided in sequence along the length direction of the first conveyor belt, the marking unit can mark the elbows, the counting unit can count the elbows after marking, a packaging unit is provided on the side away from the first conveyor belt, the packaging unit can package the elbows, and a weighing and sorting unit is provided on the side away from the packaging unit, the weighing and sorting unit can weigh and sort the elbows. The pipe marking and sorting device of the present invention can avoid the marking position from overlapping with the logo on the elbow, and at the same time, make the conveyance of the elbow on the conveyor belt more stable, reduce labor intensity, and improve work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and in particular to a pipe marking and screening device. Background Art

[0002] Elbows are a common connecting pipe fitting in pipeline systems. The main function of this component is to change the direction of the pipeline, so elbows play an important role in pipeline construction.

[0003] When the elbow is formed, a logo will be formed on one side of the elbow. After the elbow is formed, it needs to be marked, counted, packaged, and the packaging of the elbow needs to be inspected. However, the inspection process and the marking, counting, and packaging process are usually separate. The existing marking, counting, and packaging device includes an operating table and a conveyor belt. The conveyor belt is installed on the operating table. The operating table along the length of the conveyor belt is provided with a marking unit and a counting unit in sequence, and a packaging unit is provided on the side away from the counting unit. The specific operation is: the elbow is placed on the conveyor belt, the conveyor belt transports the elbow to the marking unit, and the marking unit marks the elbow. After the elbow marking is completed, the conveyor belt transports the elbow to the counting unit, and the counting unit counts and statistics the marked elbows. The elbows that have been counted and counted are then packaged by the packaging unit. When the packaged elbows need to be checked for quantity, the packaged elbows need to be transported to the inspection workshop for inspection.

[0004] This technical solution also has the following disadvantages when in use: 1. Since the position of the elbow is easily offset during the conveyor belt's conveying process, the marking position of the elbow is not fixed, and a logo is formed on one side of the elbow. If the marking position of the elbow is not fixed, it is easy to overlap with the logo on the elbow; 2. When the conveyor belt conveys the elbow to one side of the marking equipment, since the placement of the elbow is uncertain, if the elbow is placed in a ┌ shape on the conveyor belt, the elbow is easy to shake during the conveyance process, making the barcode on the pipe relatively blurred, thereby affecting the marking effect; 3. Since the inspection process is separated from the marking, counting and packaging process, the labor intensity is increased and the work efficiency is reduced. Summary of the Invention

[0005] The present invention aims to provide a pipe marking and sorting device, which can avoid the overlapping of the marking position and the logo on the elbow. At the same time, it makes the transmission of the elbow on the conveyor belt more stable, reduces labor intensity and improves work efficiency.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a pipe marking and screening device, comprising a first conveyor belt and a feeding unit, the feeding unit can convey the elbow to the first conveyor belt, a guide channel is provided above the first conveyor belt, the guide channel is provided with a straightening and downfalling unit, the straightening and downfalling unit can straighten the elbow into a ∧ shape, marking units and counting units are provided in sequence along the length direction of the first conveyor belt, the marking unit can mark the elbow, the counting unit can count the elbows after marking, a packaging unit is provided on the side away from the first conveyor, the packaging unit can package the elbows, and a weighing and screening unit is provided on the side away from the packaging unit, the weighing and screening unit can weigh and screen the elbows.

[0007] The beneficial effects of this solution are as follows: when the elbow needs to be marked and screened, the elbow is first conveyed to the first conveyor belt through the feeding unit, and the first conveyor belt conveys the elbow to the guide channel. When the elbow passes through the straightening and downsetting unit on the guide channel, the elbow is straightened into a ∧ shape and passes through the guide channel under the action of the straightening and downsetting unit. The elbow that has passed through the guide channel is conveyed to the marking unit under the action of the first conveyor belt, and the corner of the elbow is marked. The marked elbow is conveyed to the counting unit under the action of the first conveyor belt, and the marked elbows are counted. After counting and statistics, the elbows are packaged under the action of the packaging unit. The packaged elbows are weighed and screened under the action of the weighing and screening unit to distinguish between elbows with qualified packaging and elbows with unqualified packaging.

[0008] Since the guide channel is provided with a straightening and tilting unit, the straightening and tilting unit can straighten the elbow into a ∧ shape, and the elbow passes through the guide channel in a ∧ shape. The elbow passing through the guide channel directly enters the marking unit for marking, so that it can ensure that marking is performed at the corner of the elbow, thereby avoiding the marking position from overlapping with the logo on the elbow.

[0009] Since the elbow passes through the guide channel in a ∧ shape, compared with the elbow passing through the guide channel in a ┌ shape to enter the marking unit, the elbow passing through the guide channel in a ∧ shape can be more stably transported on the first conveyor belt. When marking the elbow, the elbow is not easy to shake, so that the barcode marked on the elbow is clearer and the marking effect is better.

[0010] Since this technical solution installs a weighing and screening unit on a side away from the packaging unit, once the elbows are packaged, they can be directly inspected using the weighing and screening unit, eliminating the need to carry the elbows back and forth. Therefore, this technical solution has the advantages of reducing labor intensity and improving work efficiency. At the same time, using the weighing and screening unit to inspect the packaging of the elbows is more convenient. However, when faced with the technical problem of "inspecting the packaging of the elbows," based on existing technology, those skilled in the art logically analyzed and reasoned to "transport the packaged elbows to the inspection workshop for inspection." This cognitive habit has hindered research and development in this field.

[0011] Furthermore, the feeding unit includes a second conveyor belt and a silo. One side of the silo is provided with an opening. One end of the second conveyor belt is located at the opening of the silo. The second conveyor belt can convey the elbow to the first conveyor belt. The second conveyor belt is provided with several guide plates.

[0012] The beneficial effects of this solution are: the elbows are poured into the hopper, and the guide plate can guide the elbows in the hopper to the second conveyor belt. At the same time, the guide plate can prevent the elbows in the second conveyor belt from falling during the conveying process; at the same time, the second conveyor belt is used to convey the elbows in the hopper to the first conveyor belt, thereby realizing the automation of feeding.

[0013] Furthermore, the packaging unit includes a third conveyor belt and a packaging device. The packaging device is provided with a feed port and a discharge port. The third conveyor belt is located below the first conveyor belt. The first conveyor belt can convey the elbow to the third conveyor belt. The third conveyor belt is provided with several partition plates. The third conveyor belt can convey the elbow to the feed port.

[0014] The beneficial effects of this solution are as follows: the first conveyor belt conveys the counted elbows to the third conveyor belt, where each separator divides the counted elbows into several groups. The third conveyor belt then conveys the grouped elbows to the inlet of the packaging device for packaging. This device automates packaging, reduces labor intensity, and improves work efficiency.

[0015] Furthermore, the weighing and sorting unit includes a fourth conveyor belt, an electronic scale, cylinder No. 1 and cylinder No. 2. The fourth conveyor belt is located below the discharge port of the packaging device. The fourth conveyor belt can convey the elbow to the electronic scale. Cylinder No. 1 and cylinder No. 2 are respectively located on both adjacent sides of the electronic scale, and cylinder No. 1 and cylinder No. 2 can push the elbow on the electronic scale to the opposite side.

[0016] The beneficial effects of this solution are: the elbows are conveyed to the electronic scale through the fourth conveyor belt, and weighed by the electronic scale to determine whether the packaged elbows are qualified. The No. 1 cylinder pushes the qualified products to the opposite side, and the No. 2 cylinder pushes the unqualified products to the opposite side, so that qualified products can be distinguished from unqualified products.

[0017] Furthermore, push plates are provided on the output shafts of the No. 1 cylinder and the No. 2 cylinder.

[0018] The beneficial effect of this solution is that the contact area between the push plate and the elbow on the electronic scale is larger, and the elbow on the electronic scale can be pushed to the opposite side.

[0019] Furthermore, side panels are provided on both sides of the fourth conveyor belt, and a guide bar is fixedly connected to each side panel, and the two guide bars form a guide opening in the middle of the fourth conveyor belt.

[0020] The beneficial effect of this solution is: since the two guide strips form a guide opening in the middle of the fourth conveyor belt, the packaged elbows can be conveyed in the middle of the fourth conveyor belt, so that the packaged elbows can be conveyed to the middle position of the electronic scale, so as to improve the weighing efficiency.

[0021] Furthermore, a pressing guide unit is provided on the opposite side of the marking unit. The pressing guide unit includes a support frame, a guide portion and a pressing portion. Both the guide portion and the pressing portion are slidably arranged on the support frame.

[0022] The beneficial effects of this solution are as follows: since the pressing guide unit is located on the opposite side of the marking unit, when the elbow is conveyed to the marking unit, the setting of the pressing part improves the flatness of the first conveyor belt at the marking position, making it less likely for the elbow to shake during marking, and making the barcode printed on the elbow less likely to be blurred, thereby improving the marking effect; due to the setting of the guide part, the elbow in the marking area can be guided, making it less likely for the marking position of the elbow to deviate.

[0023] Furthermore, the guide portion includes a guide rod, a first sliding rod and a second sliding rod. The first sliding rod and the second sliding rod are both slidably arranged on the support frame, and the guide rod is transversely fixed to the front ends of the first sliding rod and the second sliding rod.

[0024] The beneficial effect of this solution is that the elbow entering the marking unit can be guided along the length direction of the guide rod, so that the marking position is relatively fixed.

[0025] Furthermore, the pressing part includes a third sliding rod and a roller. The third sliding rod is slidably arranged on the support frame. The roller is rotatably connected to the third sliding rod. The roller fits the surface of the first conveyor belt, and the surface of the roller is smooth.

[0026] The beneficial effects of this solution are: since the roller fits the surface of the first conveyor belt, the flatness of the first conveyor belt at the marking position can be improved, making the elbow less likely to shake; since the surface of the roller is smooth, the friction between the roller and the first conveyor belt is reduced, thereby extending the service life of the first conveyor belt.

[0027] Furthermore, it also includes a control system, which includes a controller and a weight sensor. The electronic scale is electrically connected to the weight sensor, the counting sensor, the third conveyor belt and the controller are connected in series, the counter feeds back the counting information to the controller, the controller controls the operation of the third conveyor belt, the weight sensor is electrically connected to the controller, the second cylinder, the first cylinder and the controller are connected in parallel, the weight sensor feeds back the weight information to the controller, and the controller controls the start-up of the first cylinder or the second cylinder.

[0028] The beneficial effects of this solution are: the counting sensor feeds back the counting information to the controller, the controller controls the operation of the third conveyor belt, the third conveyor belt transports the elbow to the packaging device, and the elbow that has passed the packaging is transported to the electronic scale under the action of the fourth conveyor belt. The weight sensor feeds back the weight information to the controller, and the controller controls the start-up of the first cylinder or the second cylinder, thereby realizing the automation of counting, packaging, weighing and sorting. At the same time, the packaging condition of the elbow can be re-checked through weighing and sorting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional diagram of Example 1 of the present invention;

[0030] Figure 2 A three-dimensional diagram of the feeding unit, marking unit and counting unit of the present invention;

[0031] Figure 3 A three-dimensional diagram of the marking unit and the counting unit of the present invention;

[0032] Figure 4 A three-dimensional diagram of Example 2 of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the elbow forming die. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The reference numerals in the drawings of the specification include: second conveyor belt 1, hopper 2, guide plate 3, support platform No. 1 4, first conveyor belt 5, fixed block 6, limit bar 7, horizontal portion 8, vertical portion 9, connecting bar 10, adjustment frame 11, adjustment bolt 12, U-shaped side plate 13, guide plate 14, fixing seat 15, connecting rod 16, marker 17, base 18, support rod 19, support block 20, first sliding rod 21, second sliding rod 22, guide rod 23, third Sliding rod 24, roller 25, collecting bin 26, placing bin 27, fourth conveyor belt 28, guide bar 29, second support platform 30, electronic scale 31, first cylinder 32, first push plate 33, second cylinder 34, second push plate 35, support seat 36, cross bar 37, counter 38, third conveyor belt 39, partition plate 40, packaging device 41, feed port 42, discharge port 43, elbow 44, movable mold 45, fixed mold 46, A position 47, B position 48.

[0036] Example 1

[0037] like Figure 1 The pipe marking and sorting device shown includes a No. 1 support platform 4, a fixing block 6, a limit bar 7, a feeding unit, a packaging unit, a weighing and sorting unit and a control system.

[0038] like Figure 2 As shown, the feeding unit includes a second conveyor belt 1 and a silo 2. The silo 2 is fixed to the ground by bolts. An opening is provided on the right side of the silo 2. The second conveyor belt 1 is installed obliquely on the right side of the silo 2, and the lower end of the second conveyor belt is located at the opening on the right side of the silo 2. Several guide plates 3 are bonded to the second conveyor belt.

[0039] like Figure 2 、 Figure 3As shown, a first conveyor belt 5 is installed on the No. 1 support platform 4, and the upper end of the second conveyor belt 1 is located above the first conveyor belt 5. The second conveyor belt 1 can convey the elbow 44 to the first conveyor belt 5. A guide channel is formed between the fixed block 6 and the limit bar 7. The guide channel is located above the first conveyor belt 5. The fixed block 6 is L-shaped. The fixed block 6 includes a horizontal part 8 and a vertical part 9 connected in sequence. The vertical part 9 is installed on the front side of the support platform by bolts. The horizontal part 8 has an n-shaped through hole along the length direction of the fixed block 6, which reduces the contact area between the fixed block 6 and the first conveyor belt 5, thereby effectively reducing the wear of the first conveyor belt 5, and the lower surface of the horizontal part 8 is a smooth surface. The horizontal part 8 fits the surface of the first conveyor belt 5, which is convenient for pressing the first conveyor belt 5 and preventing the surface of the first conveyor belt 5 from bulging, thereby To ensure that the elbow 44 can pass through the guide channel smoothly, the limiting strip 7 is arranged parallel to the rear side of the fixed block 6, and a connecting strip 10 is welded to the left end of the limiting strip 7. The front end of the connecting strip 10 is provided with a first strip hole, and the front end of the connecting strip 10 is bolted to the fixed block 6 through the first strip hole. The right end of the limiting strip 7 is provided with a straightening and tilting unit, which includes a straightening frame 11 and a straightening bolt 12. The rear end of the straightening frame 11 is welded to the limiting strip 7, and the front end of the straightening frame 11 is provided with a second strip hole. The front end of the straightening frame 11 is bolted to the fixed block 6 through the second strip hole. A threaded hole is opened in the middle of the straightening frame 11, and the straightening bolt 12 is threadedly connected to the middle of the straightening frame 11. The width of the guide channel can be adjusted by the first strip hole and the second strip hole, so that the guide channel is suitable for elbows 44 of different models.

[0040] like Figure 3 As shown, a U-shaped side plate 13 is welded on the No. 1 support platform 4 on the left side of the guide channel, and a guide plate 14 is welded on the front and rear sides of the U-shaped side plate 13. There is a gap between the guide plate 14 and the first conveyor belt 5 to prevent wear of the first conveyor belt 5. The right side of the guide plate 14 is in contact with the fixed block 6 and the limit strip 7 respectively. The guide plate 14 is used to guide the elbow 44 to facilitate the conveying of the elbow 44 into the guide channel.

[0041] like Figure 3As shown, a marking unit is provided on the right side of the guide channel. The marking unit includes a fixing seat 15, which is welded to the rear side of the No. 1 support platform 4. A connecting rod 16 is welded to the fixing seat 15, and a marker 17 is mounted on the connecting rod 16 via bolts. A pressing guide unit is provided on the No. 1 support platform 4 on the opposite side of the marking unit. The pressing guide unit includes a support frame, a guide portion, and a pressing portion. The support frame includes a base 18, which is welded to the front side of the No. 1 support platform 4. A support rod 19 is welded to each end of the base 18, and a support block 20 is welded to each support rod 19. The guide portion includes a guide rod 23, a first sliding rod 21, and a second sliding rod 22. The first sliding rod 21 is slidably mounted on the right support block 20, and the second sliding rod 22 is slidably mounted on the left support block 20. The first sliding rod 21 and the second sliding rod 22 are aligned in height. The guide rod 23 is welded transversely to the front ends of the first sliding rod 21 and the second sliding rod 22. The guide rod 23 can guide the conveying direction of the elbow 44. The pressing portion includes a third sliding rod 24 and a roller 25. The third sliding rod 24 is slidably mounted on the left support block 20 and is located below the second sliding rod 22. The roller 25 is rotatably connected to the front end of the third sliding rod 24. The roller 25 is in contact with the surface of the first conveyor belt 5 and has a smooth surface.

[0042] like Figure 1 As shown, the packaging unit includes a collecting bin 26, and the first conveyor belt 5 is located above and to the right of the collecting bin 26. A placing bin 27 is provided on the left side of the collecting bin 26, and a notch is provided on the front side of the placing bin 27.

[0043] like Figure 1 As shown, the weighing and sorting unit includes a second support platform 30 and a fourth conveyor belt 28. The fourth conveyor belt 28 is located at the notch on the front side of the storage bin 27. Side panels are welded to the left and right sides of the fourth conveyor belt 28. A guide bar 29 is welded to each side panel. The two guide bars 29 form a guide opening in the middle of the fourth conveyor belt 28, allowing the elbow 44 to pass through the guide opening on the fourth conveyor belt 28. An electronic scale 31 is placed on the second support platform 30. The electronic scale 31 is located below the front side of the fourth conveyor belt 28. The fourth conveyor belt 28 can convey the elbow 44 to the electronic scale 31. A first cylinder 32 is fixed to the right side of the second support platform 30 by bolts. A first push plate 33 is connected to the output shaft of the first cylinder 32 by bolts. The first push plate 33 can push the elbow 44 on the electronic scale 31 to the left side of the second support platform 30. A second cylinder 34 is fixed to the rear side of the second support platform 30 by bolts, and a second push plate 35 is connected to the output shaft of the second cylinder 34 by bolts. The second push plate 35 can push the elbow 44 on the electronic scale 31 to the front side of the second support platform 30.

[0044] The control system includes a controller. An electronic scale 31 is electrically connected to a weight sensor, which is electrically connected to the controller. The first cylinder 32 and the second cylinder 34 are connected in parallel to the controller. The weight sensor feeds weight information back to the controller, which then activates the first cylinder 32 or the second cylinder 34. Specifically, in this embodiment, the controller is a HT46R004 single-chip microcomputer, the weight sensor is a RIZON8011, and the first cylinder 32 and the second cylinder 34 are both SC50.

[0045] The specific implementation process is as follows:

[0046] When the elbow 44 needs to be marked and sorted, the elbow 44 is first poured into the silo 2, and the second conveyor belt 1 conveys the elbow 44 to the first conveyor belt 5. The first conveyor belt 5 conveys the elbow 44 to the guide channel near the side of the connecting strip 10. Under the action of the connecting strip 10, the elbow 44 is formed as follows. Figure 1 The ┌ shape shown in the figure passes through the guide channel in sequence. Under the action of the adjusting bolt 12, the elbow 44 is made to pass through the guide channel in a ∧ shape. After the elbow 44 passes through the guide channel, it continues to move forward under the action of the first conveyor belt 5, and the elbow 44 is conveyed to the marking unit. The marker 17 marks the corner of the elbow 44. The marked elbow 44 is conveyed to the collection bin 26 through the first conveyor belt 5. The elbows 44 can be packaged in groups of any number of elbows 44. Specifically, in this embodiment, the number of elbows 44 in each group is 8. The elbows 44 in the collection bin 26 are manually packaged in groups of 8. The packaged elbows 44 are placed in the placement bin 27. Under the action of the fourth conveyor belt 28, the elbows 44 in the placement bin 27 pass through the guide port on the fourth conveyor belt 28 and are transported to the electronic scale 31. The weight sensor feeds back the weighing information to the controller. When the reading of the electronic scale 31 is the weight of 8 elbows 44, the controller controls the first cylinder 32 to work, and the first cylinder 32 pushes the elbow 44 to the left side of the electronic scale 31. When the reading of the electronic scale 31 is not the weight of 8 elbows 44, the controller controls the second cylinder 34 to work, and the second cylinder 34 pushes the elbow 44 to the front side of the electronic scale 31.

[0047] like Figure 5As shown, the elbow forming mold includes a movable mold 45 and a fixed mold 46. When the elbow 44 is formed, two convex marks are generated between the movable mold 45 and the fixed mold 46. The two convex marks divide one side of the formed elbow 44 into two parts. The Chinese character part of the logo is provided at the A position 47 of the mold, and the English part of the logo is provided at the B position 48 of the mold. After the elbow 44 is formed, the Chinese character part and the English part of the logo are respectively formed on both sides of the convex marks. When marking the elbow 44, the elbow 44 is passed through the guide channel in a ∧ shape. Marking the elbow 44 can prevent the marking position from overlapping with the logo.

[0048] Example 2

[0049] like Figure 3 As shown, different from Example 1, it also includes a counting unit, which is located on the left side of the marking unit. The counting unit includes a support base 36, which is welded to the No. 1 support platform 4 on the left side of the fixed base 15. A cross bar 37 is welded to the support base 36, and a counter 38 is fixed to the cross bar 37 by bolts. The model of the counter in this embodiment is JK72S.

[0050] like Figure 4 As shown, and different from Example 1, the packaging unit of this embodiment further includes a third conveyor belt 39 and a motor. The motor can drive the third conveyor belt 39 to operate. The third conveyor belt 39 is located at the lower left of the first conveyor belt 5. The first conveyor belt 5 can transfer the elbow 44 to the third conveyor belt 39. A plurality of partition plates 40 are bonded to the third conveyor belt 39. The partition plates 40 divide the third conveyor belt 39 into a plurality of placement areas. A packaging device 41 is installed on the ground to the left of the third conveyor belt 39. The top of the packaging device 41 is provided with a feed port 42, and the bottom of the packaging device 41 is provided with a discharge port 43. The third conveyor belt 39 can transfer the elbow 44 to the feed port 42. The discharge port 43 is located above the fourth conveyor belt 28. The motor and counter 38 that drive the rotation of the third conveyor belt 39 are connected in series with the controller. The counter 38 feeds back the counting information to the controller, and the controller controls the operation of the third conveyor belt 39.

[0051] The specific implementation process is as follows:

[0052] The marked elbows 44 are conveyed to the counting unit under the action of the first conveyor belt 5. The number of elbows 44 conveyed from the first conveyor belt 5 to the third conveyor belt 39 is counted by the counter 38. The elbows 44 can be packaged in groups of any number of elbows 44. Specifically, in this embodiment, the number of each group is 8, and the elbows 44 are packaged in groups of 8. When the number of elbows 44 conveyed by the first conveyor belt 5 to the rightmost placement area is 8, the counter feeds back the counting information to the controller, and the controller The controller controls the operation of the third conveyor belt 39, and the first conveyor belt 5 continues to convey the elbows 44 to the next placement area to ensure that the number of elbows 44 in each placement area is 8. The third conveyor belt 39 conveys the elbows 44 to the feed port 42 of the packaging device 41. Every 8 elbows 44 form a group, and the elbows 44 are packaged. The packaged elbows 44 fall from the discharge port 43 of the packaging device 41 onto the fourth conveyor belt 28, and are conveyed to the electronic scale 31 via the fourth conveyor belt 28, and the packaged elbows 44 are weighed and sorted.

[0053] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. Pipe marking and sorting device, characterized by: The feeding unit includes a first support platform, a fixed block, a limit bar, a first conveyor belt and a feeding unit. The first conveyor belt is installed on the first support platform. The feeding unit can transmit the elbow to the first conveyor belt. The fixed block is L-shaped. The fixed block includes a horizontal part and a vertical part connected in sequence. The vertical part is installed on the front side of the support platform by bolts. The limit bar is arranged in parallel on the rear side of the fixed block. A connecting strip is welded on the limit bar. A first strip hole is opened at the front end of the connecting strip. The front end of the connecting strip is connected to the fixing block bolt through the first strip hole. A guide channel is formed between the fixing block and the limit bar. The guide channel is located above the first conveyor belt. A straightening and falling unit is provided on the guide channel. The straightening and falling unit can straighten the elbow into a ∧ shape. The inverting unit includes a straightening frame and a straightening bolt. The rear end of the straightening frame is welded to the limit bar. A second strip hole is opened at the front end of the straightening frame. The front end of the straightening frame is connected to the fixing block bolt through the second strip hole. A threaded hole is opened in the middle of the straightening frame. The straightening bolt is threadedly connected to the middle of the straightening frame. A marking unit and a counting unit are sequentially arranged along the length direction of the first conveyor belt. A logo is formed on one side of the elbow. The marking unit can mark the corner of the elbow. The counting unit can count the elbows after marking. A packaging unit is provided on the side away from the first conveyor. The packaging unit can package the elbow. A weighing and screening unit is provided on the side away from the packaging unit. The weighing and screening unit can weigh and screen the elbow.

2. The pipe marking and sorting device according to claim 1, characterized in that: The feeding unit includes a second conveyor belt and a silo. One side of the silo is provided with an opening. One end of the second conveyor belt is located at the opening of the silo. The second conveyor belt can convey the elbow to the first conveyor belt. The second conveyor belt is provided with a plurality of guide plates.

3. The pipe marking and sorting device according to claim 2, characterized in that: The packaging unit includes a third conveyor belt and a packaging device. The packaging device is provided with a feed port and a discharge port. The third conveyor belt is located below the first conveyor belt. The first conveyor belt can convey the elbow to the third conveyor belt. The third conveyor belt is provided with several partition plates. The third conveyor belt can convey the elbow to the feed port.

4. The pipe marking and sorting device according to claim 3, characterized in that: The weighing and sorting unit includes a fourth conveyor belt, an electronic scale, cylinder No. 1 and cylinder No.

2. The fourth conveyor belt is located below the discharge port of the packaging device. The fourth conveyor belt can transport the elbow to the electronic scale. Cylinder No. 1 and cylinder No. 2 are respectively located on both adjacent sides of the electronic scale, and both cylinder No. 1 and cylinder No. 2 can push the elbow on the electronic scale to the opposite side.

5. The pipe marking and sorting device according to claim 4, characterized in that: Push plates are provided on the output shafts of the No. 1 and No. 2 cylinders.

6. The pipe marking and sorting device according to claim 5, characterized in that: Side plates are provided on both sides of the fourth conveyor belt. A guide bar is fixedly connected to each side plate. The two guide bars form a guide opening in the middle of the fourth conveyor belt.

7. The pipe marking and sorting device according to claim 6, characterized in that: A pressing guide unit is provided on the opposite side of the marking unit. The pressing guide unit comprises a support frame, a guide portion and a pressing portion. Both the guide portion and the pressing portion are slidably arranged on the support frame.

8. The pipe marking and sorting device according to claim 7, characterized in that: The guide portion includes a guide rod, a first sliding rod and a second sliding rod. The first sliding rod and the second sliding rod are both slidably arranged on the support frame. The guide rod is transversely fixed to the front ends of the first sliding rod and the second sliding rod.

9. The pipe marking and sorting device according to claim 8, characterized in that: The pressing part includes a third sliding rod and a roller. The third sliding rod is slidably arranged on the support frame. The roller is rotatably connected to the third sliding rod. The roller fits the surface of the first conveyor belt, and the surface of the roller is smooth.

10. The pipe marking and sorting device according to claim 9, characterized in that: It also includes a control system, which includes a controller and a weight sensor. The electronic scale is electrically connected to the weight sensor, the counting sensor, the third conveyor belt and the controller are connected in series, the counter feeds back the counting information to the controller, and the controller controls the operation of the third conveyor belt. The weight sensor is electrically connected to the controller, the second cylinder, the first cylinder and the controller are connected in parallel, the weight sensor feeds back the weight information to the controller, and the controller controls the start-up of the first cylinder or the second cylinder.

Images