Guardrail processing cutting machine and cutting tool thereof

Abstract

The present disclosure provides a guardrail processing cutting machine and its cutting tool, comprising: a shell, a supporting ring is rotatably arranged in the inner hole of the shell through a bearing, and a gas injection mechanism is arranged at the opening of both ends of the shell for injecting gas into the shell. The present disclosure relates to the technical field of guardrail processing devices. When the improved guardrail cutting machine is in use, the cutting of the hollow pipe is completed by the rapid sliding of the cutting edges of the cutting tool along the outer wall of the hollow pipe, and the continuously cooling treatment of the cutting tool is realized by the cooperation of the airflow in the shell and the gas flowing at the cutting edge of the cutting tool. The rapid sliding of the cutting tool in the cutting groove of the hollow pipe continuously drives the rapid flow of the gas in the cutting groove of the hollow pipe, so as to synchronously and continuously cool the cutting part of the hollow pipe, avoid the damage of the cutting part of the hollow pipe caused by the high temperature of the cutting tool or the cutting part of the hollow pipe, reduce the wear rate of the cutting tool, and prolong the service life of the cutting tool.

Description

Technical Field

[0001] This disclosure belongs to the technical field of guardrail processing devices, specifically relating to a guardrail processing cutting machine and its cutting tools. Background Technology

[0002] Guardrails are a common safety protection facility, widely used in highways, bridges, construction sites, parks, residential areas and other places. They are mainly used for isolation, protection and guidance. Some guardrails are made of various hollow tubes welded together.

[0003] In some existing guardrail processing and cutting machines, hollow pipes are typically cut using a large rotating cutter. Since the cutter often needs to pass through the hollow pipe during the cutting process, the cutting area between the cutter and the hollow pipe experiences prolonged friction. This can lead to high temperatures on both the cutting area and the cutter, potentially damaging the cutting area, affecting the cutting effect, accelerating cutter wear, and reducing the cutter's lifespan. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a guardrail processing and cutting machine and its cutting tool, which can simultaneously and continuously cool the guardrail pipe and the cutting tool during the cutting process, thereby avoiding the cutting part of the hollow pipe from being damaged due to excessively high temperature.

[0005] To solve the above problems, the present invention provides a guardrail processing and cutting machine, comprising: a housing, in which a support ring is rotatably mounted via a bearing in the inner hole of the housing, and an air injection mechanism is provided at both ends of the housing for injecting air into the housing and driving the support ring to rotate;

[0006] The reflux mechanism, located inside the housing, is used to guide excess gas from inside the housing into the gas injection mechanism.

[0007] Several guide vanes are fixedly installed at equal intervals on the outer peripheral wall of the support ring, and are slidably connected to the inner wall of the outer shell.

[0008] Several cutting blades are located between two adjacent guide plates, and each of them slides through the pipe wall of the support ring;

[0009] The limiting mechanism, located on the cutter, is used to adjust the spacing between several cutters in conjunction with the air injection mechanism.

[0010] Furthermore, the gas injection mechanism includes a gas storage shell, which is U-shaped and both ends are fixedly connected to the outer shell. An air pump is fixedly installed between the top of the gas storage shell and the outer shell, and the air pump's inlet and outlet are respectively inserted into the gas storage shell and the outer shell. A one-way valve is fixedly installed through the side wall at the bottom of the outer shell.

[0011] Furthermore, a pressure limiting valve is fixedly installed through the bottom side of the gas storage shell, and the air inlet of the pressure limiting valve is located outside the gas storage shell.

[0012] Furthermore, the cutter edge is arc-shaped, and a sealing ring is fixedly installed inside the support ring at the position corresponding to the cutter, with the inner wall of the sealing ring in contact with the outer wall of the corresponding cutter.

[0013] Furthermore, the reflux mechanism includes a circular tube located above the exhaust port of the air pump, which passes through the shell wall of the outer casing and the shell wall of the gas storage shell and is fixedly connected to the outer casing and the gas storage shell.

[0014] Furthermore, the bottom end of the circular tube is provided with a sealing plate, and the top end of the sealing plate is rotatably connected to the outer shell through a rotating shaft. The top side of the sealing plate is arc-shaped, and the side of the sealing plate near the exhaust port of the air pump is in contact with the exhaust port of the air pump.

[0015] Furthermore, the limiting mechanism includes a limiting strip, which is disposed inside the housing and fixedly connected to the corresponding cutter, and the length of the limiting strip is greater than the thickness of the cutter.

[0016] Furthermore, a heat sink is sleeved on the outer side of the cutter, and the heat sink is U-shaped. Two guide grooves are opened on the inner wall of the heat sink at the positions corresponding to the limiting strips, and both ends of the limiting strips are inserted into the corresponding guide grooves and in contact with the inner wall of the corresponding guide grooves.

[0017] Furthermore, the heat sink is fixedly connected to the support ring, the heat sink is slidably connected to the inner wall of the outer shell, and the two sides of the cutter are in contact with the inner wall of the corresponding heat sink. Several round holes are equidistantly opened on the heat sink.

[0018] A cutting tool for a cutting machine includes the above-mentioned guardrail processing cutting machine and a cutting blade. The cutting blade is flat and has two arc-shaped corners at opposite ends, and serrated grooves are formed at opposite ends of the cutting blade.

[0019] In summary, the present invention has at least one of the following beneficial technical effects:

[0020] When this improved guardrail cutting machine is in use, several cutting blades slide rapidly against the outer wall of the hollow pipe to complete the cutting process. At the same time, the rapidly flowing air inside the outer shell, together with the gas flowing at the cutting blades, can continuously cool the cutting blades. Furthermore, the rapid sliding of the cutting blades within the cutting groove of the hollow pipe can continuously drive the rapid flow of gas within the cutting groove, thereby simultaneously and continuously cooling the cutting area of ​​the hollow pipe. This prevents the cutting blades or the cutting area of ​​the hollow pipe from overheating and causing damage to the cutting area, reduces the wear rate of the cutting blades, and extends the service life of the cutting blades.

[0021] During the cutting process of hollow pipe fittings, the cutting part of the hollow pipe fitting can be stably supported by multiple positions of the hollow pipe fitting to avoid deviation of the cutting position. Furthermore, by gradually grinding the cutting part of the hollow pipe fitting from the outer circumference to a shallow depth, the cutting end of the hollow pipe fitting can be made smoother.

[0022] During the cutting of hollow pipe fittings, the distance between several cutting blades is automatically adjusted by the telescopic movement of the cutting blades, enabling the device to cut hollow pipe fittings of various diameters. At the same time, as the cutting blades rotate around the hollow pipe fitting, part of the cutting blades can be pushed into the outer shell by the mutual contact between the outer wall of the hollow pipe fitting and the cutting blade, or part of the cutting blades can be pushed out of the outer shell by the high-pressure chamber inside the outer shell. The length of the cutting blades extending from the outer shell is automatically adjusted according to the undulation of the outer wall of the hollow pipe fitting, so that the device can adapt to the cutting of hollow pipe fittings of various shapes, such as square pipes or hexagonal pipes. Attached Figure Description

[0023] Figure 1 This is a perspective view of the overall structure of the present invention;

[0024] Figure 2 This is a right view of the internal structure of the outer shell and the gas storage shell of the present invention;

[0025] Figure 3 This is a perspective view of the internal structure of the outer shell of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point B;

[0027] Figure 5 This is a perspective view of the support ring, guide plate, and cutter of the present invention;

[0028] Figure 6 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0029] Figure 7 This is a perspective view of the cutter and heat sink of the present invention;

[0030] Figure 8 This is a perspective view of the internal structure of the cutter and heat sink of the present invention;

[0031] Figure 9 This is a perspective view of the cutting blade and the limiting strip of the present invention.

[0032] The reference numerals in the attached figures are as follows:

[0033] 1. Outer shell; 2. Support ring; 3. Injection mechanism; 31. Air storage shell; 32. Air pump; 33. One-way valve; 34. Pressure relief valve; 35. Sealing ring; 4. Return mechanism; 41. Round tube; 42. Sealing plate; 5. Guide plate; 6. Cutter; 7. Limiting mechanism; 71. Limiting strip; 72. Heat sink; 73. Guide groove; 74. Round hole; 8. Serrated groove. Detailed Implementation

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0038] Example 1, see reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, according to Embodiment 1 of the present invention, a guardrail processing and cutting machine is provided, comprising: a housing 1, in which a support ring 2 is rotatably mounted via a bearing in the inner hole of the housing, and an air injection mechanism 3 is provided at both ends of the housing for injecting air into the housing 1 and driving the support ring 2 to rotate;

[0039] The reflux mechanism 4 is located inside the housing 1 and is used to guide excess gas inside the housing 1 into the gas injection mechanism 3.

[0040] Several guide plates 5 are fixedly installed at equal intervals on the outer peripheral wall of the support ring 2, and are slidably connected to the inner wall of the outer shell 1.

[0041] Several cutters 6 are located between two adjacent guide plates 5, and each of them slides through the pipe wall of the support ring 2;

[0042] The limiting mechanism 7 is located on the cutter 6 and is used to adjust the spacing between several cutters 6 in conjunction with the air injection mechanism 3.

[0043] In this embodiment, when installing the improved guardrail processing and cutting machine, please refer to... Figure 1 As shown, a support leg is fixedly installed on the side of the outer casing 1 away from the air injection mechanism 3 (using welding or bolt connection or other fixing methods). The bottom end of the support leg has a mounting hole, through which expansion screws are used to fix it to the ground.

[0044] This improved guardrail processing and cutting machine uses a roller conveyor to drive the hollow tubes along a fixed trajectory (the roller conveyor uses a double-layer drive roller clamping and pushing method), or it uses clamps to clamp and support the hollow tubes. Please refer to [reference needed]. Figure 1 and Figure 2 As shown, the hollow tube passes through the axial center of the inner hole of the support ring 2. When the hollow tube moves to the position of the cutter 6, the air injection mechanism 3 is activated, continuously injecting air into the outer shell 1. This first creates a high-pressure chamber inside the outer shell 1, pushing the cutter 6 towards the hollow tube. This causes the cutter 6 to come into contact with the outer wall of the hollow tube with appropriate force. Due to the constraint and limitation of the cutter 6 by the limiting mechanism 7, the contact position between the cutter 6 and the hollow tube is always the blade edge. Please refer to... Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the gas then flows within the outer casing 1, continuously blowing onto the guide plate 5, which in turn applies a continuous axial thrust to the support ring 2. (Please refer to...) Figure 3 and Figure 4As shown, a sealing ring is fixedly installed inside the shell wall of the outer shell 1, and the inner ring wall of the sealing ring contacts the outer peripheral wall of the support ring 2 to seal the gap between the support ring 2 and the outer shell 1, so as to prevent gas leakage inside the outer shell 1 from affecting the use of the device. (Because the guide plate 5 is slidably connected to the inner wall of the outer shell 1, the gap between the guide plate 5 and the inner wall of the outer shell 1 is small, and the fast-flowing airflow is difficult to bypass the guide plate 5, and can apply sufficient thrust to the guide plate 5.) As the support ring 2 rotates rapidly, the blade of the cutter 6 is attached to the outer wall of the hollow tube and rotates rapidly, gradually grinding away the tube wall at the corresponding position of the hollow tube, and finally completing the cutting process of the hollow tube.

[0045] In summary, when this improved guardrail cutting machine is in use, several cutting blades 6 slide rapidly against the outer wall of the hollow pipe to complete the cutting process. At the same time, the rapidly flowing airflow inside the outer shell 1, together with the gas flowing at the cutting blades 6, can continuously cool the cutting blades 6. Furthermore, the rapid sliding of the cutting blades 6 within the cutting groove of the hollow pipe can continuously drive the rapid flow of gas within the cutting groove, thereby simultaneously and continuously cooling the cutting part of the hollow pipe. This prevents the cutting blades 6 or the cutting part of the hollow pipe from overheating and causing damage to the cutting part, reduces the wear rate of the cutting blades 6, and extends the service life of the cutting blades 6.

[0046] During the cutting process of hollow pipe fittings by the aforementioned cutter 6, the cutting part of the hollow pipe fitting can be stably supported by multiple positions of the hollow pipe fitting to avoid deviation in the cutting position of the hollow pipe fitting. Furthermore, by gradually grinding the cutting part of the hollow pipe fitting from the outer periphery of the hollow pipe fitting to a shallow depth, the cutting end of the hollow pipe fitting can be made smoother.

[0047] During the cutting of hollow pipe fittings, the distance between several cutting blades 6 is automatically adjusted by the telescopic movement of the cutting blades 6, enabling the device to cut hollow pipe fittings of various diameters. At the same time, as the cutting blades 6 rotate around the hollow pipe fitting, part of the cutting blades 6 can be pushed into the outer shell 1 by the mutual contact between the outer wall of the hollow pipe fitting and the cutting edge of the cutting blades 6, or part of the cutting blades 6 can be pushed out of the outer shell 1 by the high-pressure chamber inside the outer shell 1. The length of the cutting blades 6 extending from the outer shell 1 is automatically adjusted according to the undulation of the outer wall of the hollow pipe fitting, so that the device can adapt to the cutting of hollow pipe fittings of various shapes, such as square pipes or hexagonal pipes.

[0048] In a further preferred embodiment of the invention, such as Figure 1 , Figure 2 and Figure 6As shown, the air injection mechanism 3 includes an air storage shell 31, which is U-shaped and both ends are fixedly connected to the outer shell 1. An air pump 32 is fixedly installed between the top of the air pump 31 and the outer shell 1. The air pump 32's inlet and outlet are respectively inserted into the air storage shell 31 and the outer shell 1. A one-way valve 33 is fixedly installed through the side wall at the bottom of the outer shell 1.

[0049] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 6 As shown, after the hollow tube cutting section moves between several cutters 6, the air pump 32 starts to continuously draw gas from the gas storage shell 31 and inject the gas into the outer shell 1. (The air pump 32 can be a Cole-Parmer Masterflex peristaltic pump or a VIVOSUN variable frequency air pump, etc., which can adjust the gas injection flow rate. The amount of gas injected into the outer shell 1 is adjusted according to the specifications of the hollow tube being cut.) The gas injected into the outer shell 1 flows along the inner cavity of the outer shell 1 and flows out through the one-way valve 33, so that the airflow blows on the guide plate 5. The guide plate 5 pushes the support ring 2 to rotate. The airflow is located in the inner cavity of the outer shell 1 and flows in an arc trajectory, which facilitates the airflow blowing on the guide plate 5.

[0050] When the airflow injects gas into the housing 1, due to the limited amount of gas discharged at the one-way valve 33, a high-pressure chamber of corresponding strength can be formed inside the housing 1 (the strength of the high-pressure chamber inside the housing 1 can be adjusted by adjusting the air injection volume of the air pump 32). After the high-pressure chamber inside the housing 1 is formed, a corresponding thrust can be applied to the cutter 6 so that the cutter 6 gradually slides out from inside the housing 1 until the blade of the cutter 6 contacts the outer wall of the hollow tube, thereby enabling the device to automatically adapt to the cutting operation of hollow tubes of corresponding diameter specifications.

[0051] In a further preferred embodiment of the invention, such as Figure 2 and Figure 3 As shown, a pressure relief valve 34 is fixedly installed through the bottom side of the gas storage shell 31, and the air inlet of the pressure relief valve 34 is located outside the gas storage shell 31.

[0052] In this embodiment, please refer to Figure 2 As shown, during the process of the gas being drawn from the gas storage shell 31 by the air pump 32, a negative pressure chamber is formed inside the gas storage shell 31 due to the obstruction of the pressure limiting valve 34, and the pressure difference across the pressure limiting valve 34 gradually increases. After the pressure difference across the pressure limiting valve 34 reaches the threshold, the outside gas flows into the gas storage shell 31 through the pressure limiting valve 34 to replenish the gas lost in the gas storage shell 31. At this time, the negative pressure intensity inside the gas storage shell 31 remains stable.

[0053] In a further preferred embodiment of the invention, such as Figure 2 , Figure 3 and Figure 4As shown, the cutter 6 has an arc-shaped edge, and a sealing ring 35 is fixedly installed in the support ring 2 at the position corresponding to the cutter 6, and the inner ring wall of the sealing ring 35 is in contact with the outer wall of the corresponding cutter 6.

[0054] In this embodiment, please refer to Figure 2 , Figure 3 and Figure 4 As shown, (a rectangular hole is provided at the position where the cutter 6 is installed on the support ring 2 for the installation of the cutter 6, and a receiving groove is provided on the inner wall of the rectangular hole for the installation of the sealing ring 35). During the process of the cutter 6 extending out of or retracting into the housing 1, due to the sealing ring 35 blocking the outer wall of the cutter 6 and the inner wall of the rectangular hole and the support ring 2 blocking the opening of the housing 1, a high-pressure chamber can be formed inside the housing 1 to prevent the gas inside the housing 1 from escaping from the gap between the cutter 6 and the support ring 2, thus affecting the pushing of the cutter 6 by the high-pressure chamber inside the housing 1.

[0055] In a further preferred embodiment of the invention, such as Figure 2 and Figure 6 As shown, the reflux mechanism 4 includes a circular tube 41, which is located above the exhaust port of the air pump 32 and passes through the shell wall of the outer casing 1 and the shell wall of the air storage shell 31 and is fixedly connected to the outer casing 1 and the air storage shell 31.

[0056] In this embodiment, after the hollow tube is cut, the operating power of the air pump 32 is gradually reduced until the air pump 32 stops operating. First, the excess gas in the outer shell 1 is discharged through the one-way valve 33. When the high pressure intensity in the outer shell 1 reaches the threshold, the excess gas in the outer shell 1 flows back into the gas storage shell 31 through the round pipe 41. Combined with the discharge of gas through the one-way valve 33, a negative pressure chamber with the same negative pressure intensity is formed in the outer shell 1 and the gas storage shell 31. This causes the cutter 6 extending from the outer shell 1 to automatically retract into the outer shell 1, so that the cutter 6 is separated from the hollow tube and avoids the cutter 6 and the hollow tube from colliding with each other, which would prevent the subsequent hollow tube from passing through the inner hole of the support ring 2 and affect the position adjustment of the subsequent hollow tube, thus affecting the subsequent cutting of the hollow tube.

[0057] In a further preferred embodiment of the invention, such as Figure 2 and Figure 6 As shown, the bottom end of the round tube 41 is provided with a sealing plate 42, and the top end of the sealing plate 42 is rotatably connected to the outer shell 1 through a rotating shaft. The top side of the sealing plate 42 is arc-shaped, and the side of the sealing plate 42 near the exhaust port of the air pump 32 is in contact with the exhaust port of the air pump 32.

[0058] In this embodiment, when the air pump 32 injects gas into the outer shell 1, the sealing plate 42 automatically rotates clockwise and comes into contact with the bottom end of the round tube 41 due to the blowing of the airflow on the sealing plate 42. Then, in conjunction with the adsorption of the sealing plate 42 by the negative pressure cavity in the gas storage shell 31, the bottom opening of the round tube 41 is stably blocked by the sealing plate 42, so that the gas in the outer shell 1 will not flow into the gas storage shell 31 and affect the formation of the high pressure cavity in the outer shell 1.

[0059] When the operating power of the air pump 32 drops to the threshold (the sealing plate 42 is made of metal or has a counterweight inside to increase its weight), because the thrust of the airflow from the air pump 32 on the sealing plate 42 is too small, the sealing plate 42 drives itself to rotate in the opposite direction by its own gravity, so as to automatically release the sealing plate 42 from the bottom opening of the circular tube 41, thereby allowing the gas in the outer shell 1 to automatically flow back into the gas storage shell 31. The device has a high degree of automation and does not require an additional drive structure, which reduces the production cost of the device.

[0060] It should be noted that a receiving cavity can also be provided inside the sealing plate 42, and a spring can be provided inside the receiving cavity to drive the sealing plate 42 to rotate automatically in the reverse direction.

[0061] In a further preferred embodiment of the invention, such as Figure 2 , Figure 5 , Figure 7 and Figure 9 As shown, the limiting mechanism 7 includes a limiting strip 71, which is disposed inside the housing 1 and fixedly connected to the corresponding cutter 6, and the length of the limiting strip 71 is greater than the thickness of the cutter 6.

[0062] In this embodiment, please refer to Figure 2 and Figure 9 As shown, when the high-pressure chamber inside the housing 1 pushes the cutter 6 out of the housing 1, the cutter 6 will not slide out completely from the housing 1 due to the constraint of the limiting strip 71, thereby avoiding the cutter 6 from sliding out completely from the housing 1 and affecting the use of the device.

[0063] In a further preferred embodiment of the invention, such as Figure 2 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, a heat sink 72 is sleeved on the outer side of the cutter 6, and the heat sink 72 is U-shaped. Two guide grooves 73 are opened on the inner wall of the heat sink 72 at the positions corresponding to the limiting strip 71. Both ends of the limiting strip 71 are inserted into the corresponding guide grooves 73 and contact the inner wall of the corresponding guide grooves 73.

[0064] In this embodiment, please refer to Figure 7 and Figure 8As shown, during the process of the cutter 6 extending out of or retracting into the housing 1, due to the mutual contact between the limiting strip 71 and the inner wall of the guide groove 73, the limiting strip 71 moves in a linear trajectory, thereby preventing the cutter 6 from sliding. During this process, the cutter 6 is pushed by the gas inside the housing 1, causing it to tilt at an angle. This would result in excessive contact force between the cutter 6 and the inner wall of the rectangular hole or the sealing ring 35, leading to excessive wear on the cutter 6 and reducing its service life.

[0065] In a further preferred embodiment of the invention, such as Figure 7 and Figure 8 As shown, the heat sink 72 is fixedly connected to the support ring 2, the heat sink 72 is slidably connected to the inner wall of the outer shell 1, and the two sides of the cutter 6 are in contact with the inner wall of the corresponding heat sink 72. Several round holes 74 are equidistantly opened on the heat sink 72.

[0066] In this embodiment, please refer to Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, a small amount of gas injected into the outer casing 1 passes through the circular hole 74, over the heat sink 72, and through the gap between the guide plate 5 and the inner wall of the outer casing 1, then flows back into the gas storage shell 31 as described above, so that the heat on the cutter 6 can be carried away by the flowing gas. The circular hole 74 can enhance the contact area between the gas and the heat-conducting plate, thereby increasing the heat exchange rate between the gas and the heat-conducting plate and enhancing the heat dissipation rate of the cutter 6.

[0067] Example 2, see also Figure 1 and Figure 9 As shown, a cutting tool for a cutting machine includes the above-mentioned guardrail processing cutting machine and a cutting blade 6. The cutting blade 6 is flat and has two arc-shaped corners at opposite ends. The cutting blade 6 also has serrated grooves 8 at opposite ends.

[0068] In this embodiment, please refer to Figure 1 and Figure 9 As shown, the flat blade 6 minimizes wear on hollow pipes during the cutting process, and the serrated groove 8 forms a blade similar to a saw blade, thereby increasing the cutting speed of the hollow pipes.

[0069] Working principle: When this improved guardrail processing and cutting machine is in use, the air pump 32 starts and continuously injects gas into the outer shell 1, so that a high-pressure chamber is formed inside the outer shell 1. This drives the cutting blade 6 to fit against the outer wall of the hollow tube with corresponding force. At the same time, an airflow with an almost fixed trajectory is formed inside the outer shell 1. Through the guide plate 5 and the support ring 2, the cutting blade 6 is driven to move around the hollow tube in a circular trajectory, so as to complete the cutting process of the hollow tube by circumferential cutting.

[0070] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A guardrail processing and cutting machine, characterized in that, include: The outer shell (1) has a support ring (2) installed in its inner hole via a bearing, and an air injection mechanism (3) is provided at both ends of the outer shell (1) to inject air into the outer shell (1) and drive the support ring (2) to rotate. The return mechanism (4) is located inside the housing (1) and is used to guide excess gas inside the housing (1) into the gas injection mechanism (3); Several guide plates (5) are fixedly installed at equal intervals on the outer peripheral wall of the support ring (2), and several guide plates (5) are slidably connected to the inner wall of the outer shell (1); Several cutters (6) are located between two adjacent guide plates (5), and all cutters (6) slide through the pipe wall of the support ring (2); The limiting mechanism (7) is located on the cutter (6) and is used to adjust the distance between several cutters (6) in conjunction with the air injection mechanism (3); The gas injection mechanism (3) includes a gas storage shell (31), which is U-shaped and has both ends fixedly connected to the outer shell (1). A gas pump (32) is fixedly installed between its top and the outer shell (1), and the inlet and outlet of the gas pump (32) are respectively inserted into the gas storage shell (31) and the outer shell (1). A one-way valve (33) is fixedly installed through the side wall at the bottom of the outer shell (1). A pressure relief valve (34) is fixedly installed through the bottom side of the gas storage shell (31), and the air inlet of the pressure relief valve (34) is located outside the gas storage shell (31). The cutter (6) has an arc-shaped edge, and a sealing ring (35) is fixedly installed in the support ring (2) at the position corresponding to the cutter (6), and the inner ring wall of the sealing ring (35) is in contact with the outer wall of the corresponding cutter (6); The reflux mechanism (4) includes a round tube (41) located above the exhaust port of the air pump (32), and the round tube (41) passes through the shell wall of the outer shell (1) and the shell wall of the gas storage shell (31) and is fixedly connected to the outer shell (1) and the gas storage shell (31).

2. The guardrail processing and cutting machine according to claim 1, characterized in that, The bottom end of the round tube (41) is provided with a sealing plate (42), and the top end of the sealing plate (42) is rotatably connected to the outer shell (1) through a rotating shaft. The top side of the sealing plate (42) is arc-shaped, and the side of the sealing plate (42) near the exhaust port of the air pump (32) is in contact with the exhaust port of the air pump (32).

3. A guardrail processing and cutting machine according to claim 2, characterized in that, The limiting mechanism (7) includes a limiting strip (71), which is located inside the housing (1) and fixedly connected to the corresponding cutter (6), and the length of the limiting strip (71) is greater than the thickness of the cutter (6).

4. A guardrail processing and cutting machine according to claim 3, characterized in that, The cutter (6) is fitted with a heat sink (72) on its outer side, and the heat sink (72) is U-shaped. Two guide grooves (73) are opened on the inner wall of the heat sink (72) at the position corresponding to the limiting strip (71), and both ends of the limiting strip (71) are inserted into the corresponding guide grooves (73) and contact the inner wall of the corresponding guide grooves (73).

5. A guardrail processing and cutting machine according to claim 4, characterized in that, The heat sink (72) is fixedly connected to the support ring (2), the heat sink (72) is slidably connected to the inner wall of the outer shell (1), and the two sides of the cutter (6) are in contact with the inner wall of the corresponding heat sink (72). A number of round holes (74) are equidistantly opened on the heat sink (72).

6. A guardrail processing and cutting machine according to claim 5, characterized in that, The cutter (6) is flat and has two arc-shaped corners at opposite ends. The cutter (6) also has serrated grooves (8) at opposite ends.

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