Length detection equipment for PPR pipe fitting production

Abstract

The invention discloses length detection equipment for PPR pipe fitting production, and relates to the technical field of production quality detection, the length detection equipment comprises a detection table, an auxiliary straightness detection mechanism is arranged on the detection table, and a multifunctional adjusting mechanism is arranged in the middle of the auxiliary straightness detection mechanism; through the arrangement of the multifunctional adjusting mechanism, the four contact columns are attached to the four direction faces of the PPR pipe, the cutting face is detected in an all-around mode, the flatness condition of the cutting face is comprehensively perceived, when the cutting face is smooth, the four contact columns act synchronously, a reliable basis is provided for judging the quality of the cutting face, the accuracy of a detection result is greatly improved, and the production efficiency is improved. Through cooperation of a contact column and a trigger in an inner groove and a feedback mechanism to a controller, the detection process can be carried out in real time, seamless butt joint with an automatic production process is achieved, unsmoothness of a cutting surface is detected, prompts can be made rapidly, timely error correction and optimization of the production process are achieved, and the production efficiency is improved. And the production efficiency and the product qualification rate are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of production quality inspection, and particularly to a length detection device for PPR pipe fittings production. Background Art

[0002] In the field of PPR pipe fittings production, the length of the pipe and the flatness of the cutting plane are key indicators affecting product quality and application. With the continuous improvement of the quality requirements for PPR pipe fittings in industries such as construction and home decoration, accurately detecting the length of the pipe fittings and the flatness of the cutting plane has become an essential link in the production process.

[0003] Traditional methods for detecting the length of PPR pipes have many drawbacks. Measuring manually with tools such as calipers not only has low efficiency and is difficult to meet the needs of large-scale production, but also the measurement accuracy is greatly affected by human factors. Differences in the measurement techniques and reading habits of different operators are likely to lead to measurement errors and cannot ensure the consistency of product quality. Contact measurement devices such as coordinate measuring machines, although having high accuracy, have high equipment costs, complex operations, slow measurement speeds, and strict requirements for the measurement environment, and are limited in actual production lines.

[0004] Laser distance sensors have shown unique advantages in the length detection of PPR pipes due to their non-contact, high-precision, and high-speed characteristics. It can quickly obtain the length data of the pipe, effectively improve the detection efficiency, and is not interfered by the subjective factors of the operator. The measurement accuracy can reach the millimeter or even micron level, providing a strong guarantee for the production of high-quality PPR pipe fittings. However, in actual applications, the PPR pipe is prone to shift during the detection process, resulting in errors in laser ranging and affecting the detection accuracy. At the same time, existing detection devices often lack effective detection means for the flatness of the pipe cutting plane and cannot comprehensively control product quality.

[0005] Therefore, a length detection device for PPR pipe fittings production is proposed to solve the above problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a length detection device for PPR pipe fittings production to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A length detection device for PPR pipe fittings production, comprising: a detection table, on which an auxiliary flatness detection mechanism is arranged, and a multi-functional adjustment mechanism is arranged in the middle of the auxiliary flatness detection mechanism;

[0008] The auxiliary flatness detection mechanism is used to assist the pipe fittings in production to maintain a straight and fixed state to avoid bending and causing misunderstandings in length detection, and can adjust the position according to the lengths of different pipe fittings;

[0009] The multifunctional adjustment mechanism is used to provide smoothness feedback for the cross sections cut on both sides of the pipe. It includes: a testing platform, an auxiliary straightness detection mechanism is provided on the testing platform, and a multifunctional adjustment mechanism is provided in the middle of the auxiliary straightness detection mechanism;

[0010] The auxiliary straightness detection mechanism is used to assist in keeping the pipes in production in a straight and fixed state to avoid bending and causing errors in length detection, and the position can be adjusted according to the length of different pipes;

[0011] The multifunctional adjustment mechanism is used to provide smoothness feedback on the cross sections cut on both sides of the pipe.

[0012] Preferably, the auxiliary straightness detection mechanism includes an auxiliary guide rail, which is fixedly connected to the detection platform, and the middle parts of the two auxiliary guide rails are fixedly connected to a central axis swivel, and both ends of the central axis swivel are rotatably connected to a connecting rod, and both ends of the two auxiliary guide rails are slidably connected to a clamping slider, and an auxiliary frame is fixedly connected above the clamping slider, and one end of the clamping slider is fixedly connected to a driving cylinder, and the driving cylinder is fixedly connected to the detection platform.

[0013] Preferably, the auxiliary straightness detection mechanism also includes a positioning frame, the positioning frame is provided with three groups of equidistant fixed connections on the upper surface of the auxiliary frame, two groups of mutually opposite cross grooves are connected in the positioning frame, two groups of double guide rods are provided above the cross grooves, the two groups of double guide rods are fixedly connected in the positioning frame, the two groups of double guide rods are slidably connected with a sliding body, the lower surface of the sliding body is rotatably connected with a guide body, the side of the guide body away from the sliding body is slidably connected to the cross groove body, and the side of the sliding body close to the center of the detection platform is fixedly connected with a resistance rod.

[0014] Preferably, the multifunctional adjustment mechanism includes a placement rack, which is fixedly connected to the central axis position of the detection platform, a slide groove is provided in the middle of the upper surface of the placement rack, an arc-shaped groove body is slidably connected in the slide groove, and a roller group is symmetrically arranged in the arc-shaped groove body, which is driven by a built-in power supply and electrically connected to an external controller, a PPR pipe is placed on the arc-shaped groove body, a laser rangefinder is fixedly connected to one side of the placement rack, and resistance bodies are slidably connected to the upper surfaces of both ends of the placement rack, one of the resistance bodies is located directly below the laser rangefinder and is on the same vertical plane, the overall height of the other resistance body is higher than the laser rangefinder, and there is a height difference between the two resistance bodies, an inner groove is provided in the resistance body, a spring is fixedly connected in the inner groove, and the end of the spring close to the PPR pipe is fixedly connected to a contact column, and a telescopic rod is fixedly connected to the end of the placement rack away from the laser rangefinder, and the telescopic end of the telescopic rod is fixedly connected to the resistance body.

[0015] Preferably, there are two auxiliary guide rails symmetrically arranged around the central axis of the detection table. Slide rails are provided at both ends of the two auxiliary guide rails. The central axis rotating body is perpendicular to the auxiliary guide rails. The central axis rotating body is composed of a fixed plate, a built-in power supply, and a rotating plate. The two connecting rods are parallel to each other. Two auxiliary frames are provided on both sides of the central axis rotating body and are in a parallel position with the central axis rotating body.

[0016] Preferably, drive power supplies are provided on both sides of the positioning frame. The two cross-shaped grooves are respectively activated by the drive power supplies provided on the positioning frame. The double guide rods are composed of two parallel and symmetric rods. Two contact rods are symmetrically arranged around the center line of the sliding body. The contact rods are inclined towards the PPR pipe. The contact rods are made of rubber. The contact rods provided on the sliding body are staggered left and right and are not on the same horizontal line.

[0017] Preferably, the placement rack is located directly above the central axis rotating body and is in a parallel position with the central axis rotating body. The arc-shaped groove is concave. The laser range finder is connected to an external power supply. A trigger is built into the inner groove. Four inner grooves are arranged around the center of the contact surface. Four contact posts are equidistantly arranged around the center of the circle of a regular circle. The telescopic rod is controlled by an external controller for its electric telescoping.

[0018] Compared with the prior art, the present invention provides a length detection device for PPR pipe fittings, having the following beneficial effects:

[0019] 1. Through the setting of the auxiliary straightness detection mechanism, the central movement of the auxiliary frames on both sides causes the contact rods to gradually fit the PPR pipe. And with the staggered arrangement of the contact rods, the two sides of the PPR pipe are pushed to the front of the laser range finder to maintain a horizontal straight state, thereby accurately positioning the PPR pipe at the center position of the measurement area, enabling the laser beam emitted by the laser range finder to accurately irradiate both ends of the PPR pipe, avoiding measurement errors caused by the offset of the PPR pipe, improving the accuracy rate of length detection. And with the clamping and fixing effect of the contact rods on the PPR pipe, the shaking and displacement of the PPR pipe during the measurement process are reduced, ensuring the stability of the measurement process, helping the laser range finder to obtain stable measurement data, reducing data fluctuations, and making the measurement results more reliable.

[0020] 2. By using the cooperation of the cross groove body and the guiding body, the distance can be adjusted according to PPR pipes with various length specifications. For longer PPR pipes, the distance between the sliding bodies can be adjusted to be larger to adapt to the length of the PPR pipes and avoid being unable to clamp due to too small a distance between the sliding bodies. For shorter PPR pipes, the distance between the sliding bodies can be reduced so that the laser rangefinder can perform accurate measurements within a suitable measurement range, improving the measurement accuracy. The distance between the two side sliding bodies can be flexibly adjusted according to the length of the PPR pipes actually produced, ensuring that PPR pipes of different lengths can be accurately clamped and positioned, improving the versatility and flexibility of the detection equipment. When replacing PPR pipes of different lengths for detection, there is no need to frequently replace the entire equipment or perform complex equipment adjustments, and only the distance between the sliding bodies needs to be simply adjusted, saving operation time and improving work efficiency.

[0021] 3. Through the setting of the concave arc surface in the arc groove body, which matches the outer surface shape of the PPR pipe, it can better fit the PPR pipe, keep the PPR pipe in a fixed position during the detection process, not easy to shake or roll left and right, and cooperate with the auxiliary flat detection mechanism to provide assistance for the initial placement position of the PPR pipe. Moreover, the contact area between the concave arc surface of the arc groove body and the PPR pipe is large and the contact is relatively uniform, which can disperse the pressure on the PPR pipe and avoid damage to the PPR pipe due to excessive local pressure.

[0022] 4. Through the setting of the multi-functional adjustment mechanism, the four contact posts are attached to the four direction surfaces of the PPR pipe to comprehensively detect the cutting surface, fully sense the flatness of the cutting surface. When the cutting surface is smooth, the four contact posts act synchronously, providing a reliable basis for judging the quality of the cutting surface, greatly improving the accuracy of the detection result, and helping to produce higher-quality PPR pipes. The cooperation between the contact posts and the trigger inside the inner groove and the feedback mechanism to the controller enable the detection process to be carried out in real time and seamlessly dock with the automated production process. When it is detected that the cutting surface is not smooth, a prompt can be quickly made to realize timely error correction and optimization of the production process, improving production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a top view structure diagram of the overall present invention;

[0025] Figure 3 is a structure diagram of the auxiliary flat detection mechanism of the present invention;

[0026] Figure 4 is a partial structure diagram of the auxiliary flat detection mechanism of the present invention;

[0027] Figure 5This is another perspective structural diagram of the local auxiliary flatness detection mechanism of the present invention;

[0028] Figure 6 This is a sectional structural diagram of the multi-functional adjustment mechanism of the present invention;

[0029] Figure 7 This is the present invention Figure 6 The enlarged structural diagram at position A in it.

[0030] In the figure:

[0031] 1. Detection table;

[0032] 2. Auxiliary flatness detection mechanism; 21. Auxiliary guide rail; 22. Central shaft rotator; 23. Linking rod; 24. Driving cylinder; 25. Clamping slider; 26. Auxiliary frame; 27. Positioning frame; 28. Cross slot; 29. Double guide rod; 210. Sliding body; 211. Guide body; 212. Contact rod;

[0033] 3. Multi-functional adjustment mechanism; 31. Placing rack; 32. Chute; 33. Arc-shaped slot; 34. PPR pipe; 35. Laser rangefinder; 36. Contact body; 37. Inner slot; 38. Spring; 39. Contact point column; 310. Telescopic rod. Specific implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Next, the present invention will be further described in detail according to the drawings and embodiments.

[0036] Embodiment

[0037] Please refer to Figures 1 to 5 as shown:

[0038] To solve the problems mentioned in the technical solution, the embodiment of the present application provides a length detection device for PPR pipe fittings production, including: a detection table 1, an auxiliary flatness detection mechanism 2 is arranged on the detection table 1, and a multi-functional adjustment mechanism 3 is arranged in the middle of the auxiliary flatness detection mechanism 2;

[0039] The auxiliary straightness detection mechanism 2 is used to assist the production of pipe fittings to maintain a straight and fixed state to avoid errors in length detection caused by bending, and can adjust the position according to the length of different pipe fittings. The auxiliary straightness detection mechanism 2 includes an auxiliary guide rail 21, which is fixedly connected to the detection table 1. Two auxiliary guide rails 21 are symmetrically arranged with the central axis of the detection table 1 as the center. Both ends of the two auxiliary guide rails 21 are provided with sliding rails. The middle of the two auxiliary guide rails 21 is fixedly connected with a central axis swivel 22. The central axis swivel 22 is mainly used to connect the connecting rods 23 on both sides to maintain a synchronous movement state. The body 22 is kept vertically with the auxiliary guide rail 21. The central axis swivel 22 is composed of a fixed plate, a built-in power supply and a rotating plate. Both ends of the central axis swivel 22 are rotatably connected to the connecting rod 23. The two connecting rods 23 are parallel to each other. Both ends of the two auxiliary guide rails 21 are slidably connected to the clamping slider 25. The upper part of the clamping slider 25 is fixedly connected to the auxiliary frame 26. The auxiliary frame 26 is provided with two respectively located on both sides of the central axis swivel 22 and in a parallel position with the central axis swivel 22. One end of the clamping slider 25 is fixedly connected to the driving cylinder 24, and the driving cylinder 24 is fixedly connected to the detection platform 1.

[0040] The auxiliary straightness detection mechanism 2 also includes a positioning frame 27, which is provided with three groups of equidistant fixed connections on the upper surface of the auxiliary frame 26, and a driving power supply is provided on both sides of the positioning frame 27. Two groups of cross slots 28 are connected to the positioning frame 27 in opposite directions. The cross slots 28 are mainly used to drive the slide 210 for forward and reverse rotation to adjust the position. The two cross slots 28 are respectively started by the driving power supply provided on the positioning frame 27. Two groups of double guide rods 29 are provided above the cross slots 28. The double guide rods 29 are composed of two parallel and symmetrical rods. The two groups of double guide rods 29 are fixedly connected to the positioning frame 27, and the slide 210 is slidably connected to the two groups of double guide rods 29. 10 The lower surface is rotatably connected with a guide body 211, which is mainly used for sliding connection on the cross groove body 28 to control the movement of the slide 210, and the side of the guide body 211 away from the slide 210 is slidably connected to the cross groove body 28, and the side of the slide 210 close to the center of the test bench 1 is fixedly connected with a resistance rod 212, which is mainly used for staggered distribution to perform resistance and fixing operations on the PPR pipe 34. Two resistance rods 212 are symmetrically arranged about the center line of the slide 210. The resistance rods 212 are rods inclined toward the direction of the PPR pipe 34. The resistance rods 212 are made of rubber. The resistance rods 212 arranged on the slide 210 are staggered left and right and are not on the same horizontal line.

[0041] Further examples: Please refer to Figures 6 to 7 As shown:

[0042] The multifunctional adjustment mechanism 3 is used to provide smoothness feedback for the cross sections cut on both sides of the pipe fitting. The multifunctional adjustment mechanism 3 includes a placement rack 31, which is fixedly connected to the central axis position on the inspection table 1. The placement rack 31 is located directly above the central axis swivel 22 and is in a parallel position with the central axis swivel 22. A slide groove 32 is provided in the middle of the upper surface of the placement rack 31, and an arc-shaped groove body 33 is slidably connected in the slide groove 32. A roller group is symmetrically arranged in the arc-shaped groove body 33, which is driven by a built-in power supply and electrically connected to an external controller. There are two arc-shaped groove bodies 33, and the arc-shaped groove bodies 33 are concave arc-shaped. PPR pipes 34 are placed on the arc-shaped groove bodies 33. A laser rangefinder 35 is fixedly connected to one side of the placement rack 31, and the laser rangefinder 35 is connected to an external power supply. The upper surfaces of both ends of the placement rack 31 are slidably connected with resistance bodies 36, one of which is located directly below the laser rangefinder 35 and is on the same vertical plane, and the other resistance body 36 is located directly below the laser rangefinder 35 and is on the same vertical plane. The overall height of the contact body 36 is higher than the laser rangefinder 35. There is a height difference between the two contact bodies 36. An inner groove 37 is provided in the contact body 36, and a trigger is built into the inner groove 37. Four inner grooves 37 are provided around the center of the contact body 36. A spring 38 is fixedly connected in the inner groove 37. One end of the spring 38 close to the PPR pipe 34 is fixedly connected to a contact post 39. Four contact posts 39 are equidistantly arranged around the center of the perfect circle. The contact post 39 is mainly used to retract after contacting the cut surface of the PPR pipe 34, thereby contacting the built-in trigger of the inner groove 37 to trigger feedback on whether the cut surface is flat. The contact post 39 is mainly used to provide flatness feedback on the four directions of the up, down, left and right of the cut surface of the PPR pipe 34. A telescopic rod 310 is fixedly connected to the end of the placement rack 31 away from the laser rangefinder 35. The telescopic end of the telescopic rod 310 is fixedly connected to the contact body 36. The telescopic rod 310 is electrically extended and retracted by an external controller.

[0043] Everything in the above example works as follows:

[0044] In the initial state: the PPR pipe 34 cut after production is placed on the two arc-shaped grooves 33, the driving cylinder 24 is not contracted, the auxiliary frame 26 is not moved in the center, and the contact rod 212 is not in contact with the PPR pipe 34.

[0045] The following is the working process of the auxiliary straightness detection mechanism 2, which is used to assist in production to keep the pipe fittings in a straight and fixed state to avoid bending and causing errors in length detection, and can adjust the position according to the length of different pipe fittings:

[0046] When in use, the PPR pipe 34 that has been cut after production is placed on the arc-shaped trough 33. Under the action of gravity and the cooperation of the concave surface of the arc-shaped trough 33, the PPR pipe 34 is at the bottom of the concave surface of the arc-shaped trough 33, so as to avoid the PPR pipe 34 from rolling and deflecting during the inspection process. Furthermore, the built-in power supply of the central axis swivel 22 is started, and the cylinder 24 is driven to shrink synchronously. Under the action of two-way control, the central axis swivel 22 rotates in the opposite direction, driving one end of the connecting rod 23 at both ends to deflect. In the process of deflection of one end of the two connecting rods 23, the connecting rod 23 pulls the auxiliary frame 26 on both sides to slide on the auxiliary guide rail 21 through the clamping slider 25. Under the setting, the stability of the horizontal sliding of the auxiliary frame 26 is enhanced, and then when the auxiliary frames 26 on both sides gradually approach the PPR pipe 34, the auxiliary frame 26 drives the interference rod 212 connected to the upper sliding body 210 to gradually approach the PPR pipe 34 until it fits with the outer arc surface of the PPR pipe 34. Under the action of the material of the interference rod 212, the friction with the PPR pipe 34 is increased to prevent the PPR pipe 34 from rolling and deflecting. At the same time, under the bidirectional action of multiple staggered interference rods 212, the interference rods 212 on the left and right sides respectively fit with the left and right arc surfaces of the PPR pipe 34, and under the centering force on both the left and right sides, the PPR pipe 34 is positioned. , maintain the parallelism of the PPR pipe 34 and the laser rangefinder 35, then start the laser rangefinder 35, and emit a laser beam to the starting end of the PPR pipe 34 close to the laser rangefinder 35. After the laser beam hits the surface of the starting end of the pipe, since the height of the resistance body 36 far away from the laser rangefinder 35 is higher than the laser rangefinder 35, the laser rangefinder 35 emits a laser beam and reflects it between the resistance body 36. The built-in receiver of the laser rangefinder 35 receives the reflected laser beam. The laser rangefinder 35 calculates the distance from the laser rangefinder 35 to the starting end of the PPR pipe 34 based on the time difference between the emission and reception of the laser beam and the speed of light. Similarly, when the resistance rod 212 is against the PPR While the pipe 34 is being positioned and held, a laser beam is irradiated onto the end of the PPR pipe 34. The laser beam is reflected on the end surface and received by the laser rangefinder 35. Since one of the abutting bodies 36 and the laser rangefinder 35 is in the same vertical plane, and under the setting of the inner groove 37, when the PPR pipe 34 abuts against the contact post 39 to measure the flatness of the cut surface, the contact post 39 shrinks into the inner groove 37. At this time, the cut surface of the PPR pipe 34 and the transmitting end of the laser rangefinder 35 are in the same vertical line. Therefore, when the laser rangefinder 35 measures, the difference in the transmitting and receiving time between the end and the initial segment is used to measure the end distance minus the starting end distance to obtain the pipe length, and the feedback is sent to the controller.

[0047] Furthermore, when the length of the PPR pipe 34 produced in batches is detected, the position of the slide 210 can be adjusted according to the length of the PPR pipe 34, so as to adjust the position of the two sides of the PPR pipe 34 fixed by the interference rod 212. During adjustment, the power supplies on both sides of the positioning frame 27 are started, driving the two cross slots 28 to rotate forward respectively. When the cross slot 28 rotates forward, the guide body 211 sliding on the cross slot 28 moves forward along the rotation direction of the cross slot 28, thereby driving the slide 210 connected to the guide body 211 to move horizontally under the guidance of the double guide rods 29, and the slide 210 moves from the two sides of the positioning frame 27 to the middle. After the two slides 210 are adjusted to the closest distance, under the action of the double reverse grooves on the cross slot 28 and the rotation of the cross slot 28, the guide body 211 starts to slide in the opposite direction, thereby controlling the two slides 210 to move toward the outside of the positioning frame 27, gradually widening the distance, and completing the adjustment work.

[0048] Through the setting of the auxiliary straightness detection mechanism 2, the centering movement of the auxiliary frames 26 on both sides prompts the interference rods 212 to gradually fit with the PPR pipe 34, and under the staggered setting of the interference rods 212, the two sides of the PPR pipe 34 are pushed to the front of the laser rangefinder 35 to maintain a horizontal and straight state, so that the PPR pipe 34 is accurately positioned in the center of the measurement area, so that the laser beam emitted by the laser rangefinder 35 can accurately illuminate the two ends of the PPR pipe 34, avoiding measurement errors caused by variations in the PPR pipe 34, and improving the accuracy of length detection. Moreover, under the clamping and fixing effect of the interference rods 212 on the PPR pipe 34, the shaking and displacement of the PPR pipe 34 during the measurement process are reduced, thereby ensuring the stability of the measurement process, helping the laser rangefinder 35 to obtain stable measurement data, reducing data fluctuations, and making the measurement results more reliable.

[0049] By cooperating with the cross groove body 28 and the guide body 211, the spacing of the PPR pipes 34 with various length specifications can be adjusted. For longer PPR pipes 34, the spacing of the sliders 210 can be adjusted to be larger to adapt to the length of the PPR pipes 34, avoiding the inability to clamp due to the sliders 210 spacing being too small; for shorter PPR pipes 34, the spacing of the sliders 210 can be reduced, so that the laser rangefinder 35 can accurately measure within a suitable measurement range, thereby improving the measurement accuracy. The distance between the sliders 210 on both sides can be flexibly adjusted according to the actual length of the PPR pipes 34 produced, ensuring that PPR pipes 34 of different lengths can be accurately clamped and positioned, thereby improving the versatility and flexibility of the detection equipment. When replacing PPR pipes 34 of different lengths for detection, there is no need to frequently replace the entire equipment or perform complex equipment adjustments. Only the spacing of the sliders 210 needs to be simply adjusted, thereby saving operation time and improving work efficiency.

[0050] Please refer to the above working processFigures 1 to 5 .

[0051] The following is the working process of the multifunctional adjustment mechanism 3 for providing smoothness feedback on the cross-sections cut on both sides of the pipe fitting:

[0052] When in use, after the length detection of the PPR pipe 34 is completed, the telescopic rod 310 is started by the external controller and extended. The extension of the telescopic rod 310 pushes the resistance body 36 fixed to it to approach the PPR pipe 34. The resistance body 36 gradually approaches until it fits with the PPR pipe 34, pushing the PPR pipe 34 to move toward the other resistance body 36. After the movement is completed and the two ends of the PPR pipe 34 are relatively positioned, the four contact posts 39 provided on the two resistance bodies 36 respectively fit and contact with the upper, lower, left and right four parts of the PPR pipe 34. At the same time, under the mutual resistance force between the PPR pipe 34 and the contact posts 39, the contact posts 39 retract inwardly, and the spring 38 is compressed. At this time, the roller group in the arc-shaped groove body 33 is driven by the built-in power supply to Forward rotation, during the rotation of the roller group, its outer ring fits with the outer surface of the PPR pipe 34. Under the transmission of friction, the rotation of the roller group provides external power to make the PPR pipe 34 rotate in the arc-shaped groove 33. During the rotation, the contact post 39 always fits with the cut surface of the PPR pipe 34, so that the cut surface of the PPR pipe 34 fits and rotates in contact with the contact post 39. If the cut surface of the PPR pipe 34 is smooth all around, the contact posts 39 will shrink into the inner groove 37, fit and trigger with the trigger set in the inner groove 37, and feedback will be sent to the controller that the PPR pipe 34 is qualified. If it is not cut smoothly, one or more of the contact posts 39 will not be able to fit and trigger with the trigger set in the inner groove 37, and feedback will be sent to the controller that the PPR pipe 34 does not meet the requirements.

[0053] By setting the concave arc surface of the arc-shaped groove body 33, it matches the outer surface shape of the PPR pipe 34, can better fit the PPR pipe 34, so that the PPR pipe 34 is in a fixed position during the detection process, and is not easy to shake or roll left and right. It cooperates with the auxiliary straightness detection mechanism 2 to provide assistance for the initial placement of the PPR pipe 34. The concave arc surface of the arc-shaped groove body 33 has a large contact area with the PPR pipe 34, and the contact is more uniform, which can disperse the pressure on the PPR pipe 34 and avoid damage to the PPR pipe 34 due to excessive local pressure.

[0054] Through the setting of the multi-functional adjustment mechanism 3, the four contact posts 39 are in contact with the four directional surfaces of the PPR pipe 34, detecting the cutting surface in all directions and comprehensively perceiving the flatness of the cutting surface. When the cutting surface is smooth, the four contact posts 39 act synchronously, providing a reliable basis for judging the quality of the cutting surface, greatly improving the accuracy of the detection results, and contributing to the production of higher-quality PPR pipes 34. The cooperation between the contact posts 39 and the internal trigger in the inner groove 37 and the feedback mechanism to the controller enable the detection process to be carried out in real time and seamlessly dock with the automated production process. When the cutting surface is detected to be uneven, a prompt can be quickly given, realizing timely error correction and optimization in the production process, and improving production efficiency and product qualification rate.

[0055] Please refer to the above working process Figures 6 to 7 。

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A length detection device for the production of PPR pipe fittings, comprising: Testing table (1), an auxiliary straightness detection mechanism (2) is arranged on the testing table (1), characterized in that a multi-functional adjustment mechanism (3) is arranged in the middle of the auxiliary straightness detection mechanism (2); The auxiliary straightness detection mechanism (2) is used to assist the pipe fittings produced to maintain a straight and fixed state to avoid errors in length detection caused by bending, and the position can be adjusted according to the lengths of different pipe fittings; The multi-functional adjustment mechanism (3) is used to feedback the smoothness of the cross sections cut on both sides of the pipe fitting.

2. The length detection device for producing PPR pipe fittings according to claim 1, characterized in that: The auxiliary straightness detection mechanism (2) includes an auxiliary guide rail (21), the auxiliary guide rail (21) is fixedly connected to the testing table (1), a central shaft rotating body (22) is fixedly connected in the middle of the two auxiliary guide rails (21), linkage rods (23) are rotatably connected to both ends of the central shaft rotating body (22), clamping sliders (25) are slidably connected to both ends of the two auxiliary guide rails (21), an auxiliary frame body (26) is fixedly connected above the clamping sliders (25), a driving air cylinder (24) is fixedly connected to one end of the clamping slider (25), and the driving air cylinder (24) is fixedly connected to the testing table (1).

3. The length detection device for PPR pipe fittings production according to claim 2, characterized in that: The auxiliary straightness detection mechanism (2) further includes a positioning frame (27), three groups of the positioning frames (27) are fixedly connected to the upper surface of the auxiliary frame body (26) at equal intervals, two groups of cross grooves (28) in opposite directions are connected in the positioning frame (27), two groups of double guide rods (29) are arranged above the cross grooves (28), the two groups of double guide rods (29) are fixedly connected in the positioning frame (27), sliding bodies (210) are slidably connected to the two groups of double guide rods (29), a guiding body (211) is rotatably connected to the lower surface of the sliding body (210), the guiding body (211) is slidably connected to the cross groove (at the side away from the sliding body (210), and a resisting rod (212) is fixedly connected to the side of the sliding body (210) close to the center of the testing table (1).

4. The length detection device for producing PPR pipe fittings according to claim 1, characterized in that: The multifunctional adjustment mechanism (3) includes a placement rack (31), which is fixedly connected to the central axis position of the detection table (1). A chute (32) is opened in the middle of the upper surface of the placement rack (31). An arc-shaped groove body (33) is slidably connected in the chute (32). A roller group is symmetrically arranged in the arc-shaped groove body (33), which is driven by a built-in power supply and electrically connected to an external controller. A PPR pipe (34) is placed on the arc-shaped groove body (33). A laser rangefinder (35) is fixedly connected to one side of the placement rack (31). Two contact bodies (36) are slidably connected to the upper surfaces of both ends of the placement rack (31). One of the contact bodies (36) is located directly below the laser rangefinder (35) and is on the same vertical plane. The overall height of the other contact body (36) is higher than that of the laser rangefinder (35). There is a height difference between the two contact bodies (36). An inner groove (37) is opened in the contact body (36). A spring (38) is fixedly connected in the inner groove (37). One end of the spring (38) close to the PPR pipe (34) is fixedly connected with a contact column (39). A telescopic rod (310) is fixedly connected to one end of the placement rack (31) away from the laser rangefinder (35). The telescopic end of the telescopic rod (310) is fixedly connected to the contact body (36).

5. The length detection device for PPR pipe fittings production according to claim 2, characterized in that: Two auxiliary guide rails (21) are symmetrically arranged with the central axis of the detection table (1) as the center. Slide rails are arranged at both ends of the two auxiliary guide rails (21). The central axis rotating body (22) is perpendicular to the auxiliary guide rail (21). The central axis rotating body (22) is composed of a fixing plate, a built-in power supply and a rotating plate. The two connecting rods (23) are parallel to each other. Two auxiliary frames (26) are arranged on both sides of the central axis rotating body (22) and are in parallel with the central axis rotating body (22).

6. The length detection device for PPR pipe fittings production according to claim 3, characterized in that: Driving power supplies are arranged on both sides of the positioning rack (27). The two cross groove bodies (28) are respectively started by the driving power supplies arranged on the positioning rack (27). The double guide rods (29) are composed of two parallel and symmetric rods. Two contact rods (212) are symmetrically arranged with the center line of the sliding body (210) as the center. The contact rods (212) are rods inclined towards the PPR pipe (34). The contact rods (212) are made of rubber. The contact rods (212) arranged on the sliding body (210) are distributed in a left-right staggered manner and are not on the same horizontal line.

7. An apparatus for detecting the length of PPR pipe fittings during production according to claim 4, characterized in that: The placement rack (31) is located directly above the central axis rotating body (22) and is in parallel with the central axis rotating body (22). The arc-shaped groove body (33) is concave arc-shaped. The laser rangefinder (35) is connected to an external power supply. A trigger is arranged in the inner groove (37). Four inner grooves (37) are opened around the center of the contact body (36). Four contact columns (39) are arranged equidistantly around the center of a circle in a circular shape. The telescopic rod (310) is controlled by an external controller for its electric telescoping.

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