Cutting equipment for nodular cast iron pipe machining

Abstract

The invention relates to a nodular cast iron pipe machining cutting device, and relates to the technical field of cast iron pipe production and machining, the nodular cast iron pipe machining cutting device comprises a base, a cutting mechanism for cutting a pipe fitting and a clamping mechanism for fixing and clamping the pipe fitting; the vertical plates are arranged left and right, supporting assemblies for supporting the inner walls of the pipe fittings are fixed to the sides, close to the cutting mechanism, of the vertical plates, and the two supporting assemblies are arranged in a mirror image mode. The supporting assembly comprises a supporting rod and an air bag I; the supporting rods are of telescopic adjusting structures and are fixed to the corresponding vertical plates. The first air bag is of an annular structure and connected to the outer side of the telescopic end of the supporting rod in a sleeving mode, and the inner wall of the pipe fitting is supported through inflation expansion. The technical effects that the interior of the pipe fitting is stably supported during cutting, the quality of a cut pipe opening is improved, the stability during cutting is improved, and the cutting efficiency is improved can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cast iron pipe production and processing, and particularly to a cutting device for processing ductile iron pipes. Background Art

[0002] Ductile iron pipes are pipes made of cast iron molten metal numbered 18 or above. After adding a spheroidizing agent, they are centrifugally cast at high speed by a centrifugal ductile iron pipe machine. They are widely used in urban water supply, industrial water supply, fire water supply, etc., and can withstand relatively high pressures. The cutting device for processing ductile iron pipes plays multiple key roles in the cutting process, directly affecting the pipe quality, project efficiency, and safety.

[0003] Regarding the cutting of ductile iron pipes, a Chinese invention patent with the patent number CN118123100B discloses a cutting device for cast iron pipe production, including a housing mechanism. The housing mechanism includes a base. Above the rear side of the middle of the base is provided a cutting mechanism. The cutting mechanism includes a cutting bracket. The cutting bracket is U-shaped and has an opening facing downwards. The lower end of the cutting bracket is fixedly connected to the base. In the middle of the upper beam of the cutting bracket is fixedly connected with a first electric telescopic rod. The lower end of the first electric telescopic rod is fixedly connected with an arc table. The lower surface of the arc table is fixedly connected with a cutting wheel. Above the left and right parts of the base are symmetrically provided end mechanisms. The end mechanisms include a rotating mechanism and a clamping and moving mechanism. The rotating mechanism includes a second pulley. A middle hole is penetrated through the middle of the surface of the second pulley. On the front side of the second pulley close to the cutting mechanism, electric rails are respectively fixedly connected before and after. This invention can save time and improve the working efficiency of the device.

[0004] When the above solution cuts ductile iron pipes, although the operation efficiency is improved to a certain extent, in actual use, the existing technology mainly relies on an external clamping mechanism to fix the pipe fittings. Therefore, during cutting, the internal support of the pipe fittings is insufficient. Without internal support and a continuous support structure in the cutting section, axial tearing is likely to occur at the fracture of the pipe fittings, forming irregular burrs. And when cutting thin-walled cast iron pipes, it is easy to cause deformation of the pipe orifice or uneven cut; at the same time, in the existing technology, when clamping pipes with different diameters through a cushion table and a clamping mechanism, corresponding components need to be adjusted, the operation is cumbersome, and it cannot adapt to the pipe diameter flexibly, with poor adaptability and affecting the cutting efficiency. Summary of the Invention

[0005] The present application provides a cutting device for processing ductile iron pipes, solving the technical problems in the prior art such as insufficient internal support of pipe fittings during cutting, low quality of the pipe orifice after cutting, poor stability during cutting, and reduced cutting efficiency, and achieving the technical effects of stable internal support of pipe fittings during cutting, improved quality of the pipe orifice after cutting, improved stability during cutting, and increased cutting efficiency.

[0006] The present application provides a cutting device for processing ductile iron pipes, including a base, a cutting mechanism for cutting pipe fittings, and a clamping mechanism for fixedly clamping pipe fittings. Two vertical plates are fixed on the base. The vertical plates are arranged left and right, and on the side close to the cutting mechanism, a support assembly for supporting the inner wall of the pipe fitting is fixed on each. The two support assemblies are arranged mirror-symmetrically. The support assembly includes a support rod and an airbag I. The support rod is a telescopic adjustment structure and is fixed on the corresponding vertical plate. The airbag I is a ring-shaped structure and is sleeved outside the telescopic end of the support rod, and realizes the support for the inner wall of the pipe fitting through inflation and expansion.

[0007] Furthermore, the cutting mechanism includes a cutting bracket, an electric telescopic rod, a cutting wheel, and a cushion table. The cutting bracket is a U-shaped structure and is fixed on the base. The cutting wheel is fixed on the cutting bracket through the electric telescopic rod and is used for cutting the pipe fitting. The cushion table is fixed below the cutting bracket and is used for supporting the cutting part of the pipe fitting.

[0008] Furthermore, two groups of clamping mechanisms are provided and are arranged mirror-symmetrically left and right. Each group of clamping mechanisms includes two clamping mechanisms arranged mirror-symmetrically front and back. The clamping mechanism includes a clamping rod and an arc plate. The clamping rod is a telescopic adjustment structure and is fixed on the vertical plate. The arc plate is fixed on the telescopic end of the clamping rod and is used for clamping the pipe fitting from the outside.

[0009] Furthermore, the airbag I is provided with two layers, including an inner layer bag and an outer layer bag. The inner layer bag is sleeved outside the support rod and is used for realizing the support for the inner wall of the pipe fitting through expansion. The outer layer bag is fixed outside the inner layer bag and a magnetic fluid I is contained inside it, and is used for realizing the switching between the flexible self-adaptation and the rigid support of the airbag I through electromagnetic control, so as to meet the support requirements of different pipe fittings.

[0010] Furthermore, the inner layer bag is communicated with an external air pump I through a pipeline. The internal space of the inner layer bag is divided into a plurality of air chambers I. The air chambers I are ring-shaped structures and the volume after expansion decreases successively along the direction away from the vertical plate. By inflating the inner layer bag, the air chambers I are inflated step by step, so that the magnetic fluid I in the outer layer bag is extruded to the pipe fitting cutting position, realizing precise positioning and fixed-point rigid support for the pipe fitting cutting part.

[0011] Furthermore, a plurality of sensors I are uniformly fixed on the outer side wall of the outer layer bag along its circumferential direction and are used for monitoring the support strength of the inner wall of the pipe fitting. By contacting the inner wall of the pipe fitting through the sensors I and cooperating with the external air pump I, the support strength of the inner wall of the pipe fitting is jointly regulated.

[0012] Further, a second airbag that cooperates with the first airbag is fixed to the outer side of the arc plate. The second airbag is of an arc structure and includes a regulation bladder and a support bladder; The regulation bladder is of an arc structure and is fixed to the outer arc surface of the arc plate; the support bladder is fixed to the outer side of the regulation bladder and a second magnetorheological fluid is arranged inside it Further, the support bladder communicates with an external air pump II through a pipeline; the interior of the support bladder is divided into a plurality of second bladder cavities, and the second bladder cavities are circumferentially arrayed along the outer arc surface of the arc plate and are used for making different positions of the second bladder cavities expand to different degrees by control so as to fit clamping of different pipe diameters.

[0013] Further, a plurality of second sensors are arranged on the outer arc surface of the support bladder along its radial direction. The second sensors are opposite to the positions of the second bladder cavities. The pressures at different positions of the pipe fitting are sensed by the second sensors at different positions, and then the expansion degrees of the corresponding second bladder cavities are controlled, the distribution of the second magnetorheological fluid in the support bladder is optimized, and in cooperation with the first sensor, the first bladder cavity and the first magnetorheological fluid, straightening of the small bending deformation of the pipe fitting cutting port is realized.

[0014] Further, the straightening regulation process of the first sensor and the second sensor is as follows: Step 1: After the support assembly and the clamping mechanism support and clamp the pipe fitting, the first sensor and the second sensor start to monitor the support strength of the inner wall and the outer wall of the pipe fitting, and the external control system presets the safety ranges of the support strength and the clamping force; Step 2: The first sensor and the second sensor feedback the monitored data to the external control system in real time. When the first sensor monitors that the support strength of the inner wall of the pipe fitting is insufficient, the external control system sends a signal to the external air pump I to increase the inflation amount of the first airbag, so that the first magnetorheological fluid is extruded to the cutting position of the pipe fitting for fixed-point support; meanwhile, when the second sensors at different positions monitor that the clamping force at a certain position on the outer wall of the pipe fitting is too large, the external control system sends a signal to the external air pump II and adjusts the expansion amount of the corresponding second bladder cavity to reduce the clamping force at the corresponding position to adapt to the pipe fitting, and the two cooperate with each other to fix the cutting position of the pipe fitting; Step 3: The hardening degrees of the first magnetorheological fluid and the second magnetorheological fluid are respectively controlled by controlling the external magnetic field intensity to provide support and clamping; Step 4: After sensors 1 and 2 detect slight deformations at the pipe fitting cutting opening, control the external magnetic field intensity to soften Magnetorheological Fluid 1 and Magnetorheological Fluid 2. Then, transmit the detected deformation data to the external control system. The external control system sends signals to External Air Pump 1 and External Air Pump 2. External Air Pump 1 and External Air Pump 2 respectively control the expansion amounts of Chamber 1 and Chamber 2, regulate the distributions of Magnetorheological Fluid 1 and Magnetorheological Fluid 2 according to the deformation data. Meanwhile, under the control of the external magnetic field intensity, along with the movement and hardening of Magnetorheological Fluid 1 and Magnetorheological Fluid 2, jointly straighten the slight deformations at the pipe fitting cutting opening until it is straightened back to the initial state; Step 5: After sensors 1 and 2 detect that the pipe fitting cutting opening has returned to the initial state, control the external magnetic field to return to the initial state. Meanwhile, the external control system controls External Air Pump 1 and External Air Pump 2 to return to the initial state.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages: Through the length-adjustable support rod and the structure of Airbag 1, and the internal-external clamping synergistic effect formed with the outer clamping mechanism, jointly stabilize the pipe fitting, not only reducing the deformation of the pipe fitting caused by internal stress during cutting, but also preventing the pipe fitting from moving or vibrating due to external forces, ensuring the stability and flatness of the pipe fitting during cutting, effectively solving the technical problems of insufficient internal support of the pipe fitting during cutting, low quality of the pipe orifice after cutting, poor stability during cutting, and reduced cutting efficiency in the prior art, and achieving the technical effects of stable internal support of the pipe fitting during cutting, improved quality of the pipe orifice after cutting, improved stability during cutting, and increased cutting efficiency. Description of the Drawings

[0016] Figure 1 It is the overall structure diagram of a cutting device for processing ductile iron pipes according to the present invention.

[0017] Figure 2 It is the lateral three-dimensional structure diagram of a cutting device for processing ductile iron pipes according to the present invention.

[0018] Figure 3 It is the overall structure diagram of a cutting device for processing ductile iron pipes according to the present invention when cutting a pipe fitting.

[0019] Figure 4 It is the partial three-dimensional cross-sectional view of a cutting device for processing ductile iron pipes according to the present invention.

[0020] Figure 5 It is the three-dimensional structure diagram of the support assembly of a cutting device for processing ductile iron pipes according to the present invention.

[0021] Figure 6Schematic diagram of the state when the support component of a cutting device for processing ductile iron pipes in the present invention supports the inner wall of a pipe fitting.

[0022] Figure 7 Schematic diagram of the state when a cutting device for processing ductile iron pipes in the present invention supports at the cutting position of a pipe fitting by inflating the first air cavity to gather the first magnetorheological fluid and straightens the bent part of the cutting opening. Figure 8 Stereo structure diagram of the clamping mechanism of a cutting device for processing ductile iron pipes in the present invention.

[0023] Figure 9 For a cutting device for processing ductile iron pipes in the present invention Figure 8 Cross-sectional view taken along the A-A direction.

[0024] Figure 10 Cross-sectional view of the clamping mechanism of a cutting device for processing ductile iron pipes in the present invention.

[0025] Figure 11 Cross-sectional view of the support component and the clamping mechanism of a cutting device for processing ductile iron pipes in the present invention when jointly supporting and straightening the inner and outer sides of the cutting position of a pipe fitting.

[0026] In the attached drawings, the list of components represented by each reference numeral is as follows: 100, base; 110, cutting mechanism; 111, cutting bracket; 112, electric telescopic rod; 113, cutting wheel; 114, cushion table; 120, clamping mechanism; 121, clamping rod; 122, arc plate; 130, vertical plate; 150, first sensor; 160, second sensor; 200, support component; 210, support rod; 220, first airbag; 221, inner layer of the airbag; 222, outer layer of the airbag; 223, first air cavity; 230, first magnetorheological fluid; 310, second airbag; 311, regulation airbag; 312, support airbag; 313, second air cavity; 320, second magnetorheological fluid. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0028] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0029] In the description of the present application, the term "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "for example" in the present application is not necessarily construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be implemented without the use of these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0030] Please refer to Figure 1 , which is a schematic diagram of the overall structure of a cutting device for processing ductile iron pipes according to the present invention; the cutting device for processing ductile iron pipes in the present application uses a support rod 210 with adjustable length and an airbag 220 structure, and forms an inner-outer clamping cooperation with the outer clamping mechanism 120 to jointly stabilize the pipe fittings, not only reducing the deformation of the pipe fittings caused by internal stress during cutting, but also preventing the pipe fittings from moving or vibrating due to external forces, ensuring the stability and flatness of the pipe fittings during cutting; achieving the technical effects of stable internal support of the pipe fittings during cutting, improved quality of the pipe orifice after cutting, improved stability during cutting, and improved cutting efficiency.

[0031] Embodiment 1 As Figures 1 to 4 shown, a cutting device for processing ductile iron pipes in the present application includes a base 100, a cutting mechanism 110 for cutting the pipe fittings, and a clamping mechanism 120 for fixedly clamping the pipe fittings. Two vertical plates 130 are fixed on the base 100. The vertical plates 130 are arranged left and right, and support assemblies 200 for supporting the inner wall of the pipe fittings are fixed on the side close to the cutting mechanism 110. The two support assemblies 200 are arranged in a mirror image. The support assembly 200 includes a support rod 210 and an airbag 220; The support rod 210 is a telescopic adjustment structure and is fixed on the corresponding vertical plate 130; the first airbag 220 is an annular structure, sleeved on the outer side of the telescopic end of the support rod 210, and realizes the support for the inner wall of the pipe fitting through inflation and expansion.

[0032] The cutting mechanism 110 includes a cutting bracket 111, an electric telescopic rod 112, a cutting wheel 113 and a cushion table 114; The cutting bracket 111 is a U-shaped structure and is fixed on the base 100; The cutting wheel 113 is fixed on the cutting bracket 111 through the electric telescopic rod 112 and is used for cutting the pipe fitting; The cushion table 114 is fixed below the cutting bracket 111 and is used for supporting the cutting part of the pipe fitting.

[0033] There are two sets of the clamping mechanisms 120, which are arranged in left-right mirror symmetry. Each set of the clamping mechanisms 120 includes two clamping mechanisms 120 arranged in front-back mirror symmetry. The clamping mechanism 120 includes a clamping rod 121 and an arc plate 122; The clamping rod 121 is a telescopic adjustment structure and is fixed on the vertical plate 130; the arc plate 122 is fixed on the telescopic end of the clamping rod 121 and is used for clamping the pipe fitting from the outside.

[0034] The telescopic end of the support rod 210 is a combination of hard and flexible. The hard section is made of steel, and the flexible section is made of rubber. The first airbag 220 is actually sleeved on the outer side of the flexible section of the support rod 210.

[0035] The cutting wheel 113 is driven by an internal motor to rotate and is used for cutting the pipe fitting. Preferably, it is a DC motor, which is a prior art and will not be elaborated here.

[0036] When the embodiment of the present application actually operates, the steps are as follows: First, sleeved the pipe fitting to be cut on the support rod 210, adjust the length of the support rod 210 to a suitable position to ensure the stability of the pipe fitting; then, inflate the first airbag 220 to make it expand and closely fit with the inner wall of the pipe fitting to provide internal support. At the same time, start the clamping mechanism 120 to clamp the pipe fitting from the outside to form a form of internal support and external clamping; finally, start the cutting mechanism 110, start the cutting wheel 113 to rotate and drive the cutting wheel 113 to move downward through the electric telescopic rod 112 to cut the pipe fitting. After the cutting is completed, make the cutting mechanism 110 and the clamping mechanism 120 return to the initial position, deflate the first airbag 220, and take out the cut pipe fitting.

[0037] The technical solutions in the above embodiments of the present application at least have the following technical effects or advantages: This application utilizes the structure of the support rod 210 with adjustable length and the first airbag 220. Through the combined action of the internal support provided by the support assembly 200 and the external clamping of the outer clamping mechanism 120, the pipe fitting is stabilized together. The internal support reduces the deformation of the pipe fitting caused by internal stress during the cutting process, while the external clamping prevents the pipe fitting from moving or vibrating due to external forces, ensuring the stability and flatness of the pipe fitting during the cutting process, achieving precise support and stable fixation of the pipe fitting, effectively reducing the deformation and vibration of the pipe fitting during the cutting process, and improving the cutting accuracy and efficiency. At the same time, when the first airbag 220 expands, its surface gradually contacts the inner wall of the pipe fitting until the first airbag 220 is completely attached to the inner wall of the pipe fitting, reducing the uneven pressure on the inner wall of the pipe fitting and avoiding the deformation or damage of the pipe fitting caused by excessive local pressure. The technical effects of stable internal support of the pipe fitting during cutting, improved quality of the pipe orifice after cutting, increased stability during cutting, and increased cutting efficiency are achieved.

[0038] Embodiment 2 Considering that the support mode of the first airbag 220 is single and it cannot flexibly adapt to the requirements of different cutting stages only by providing a stable support force, in order to expand the scope of application, meet different key support requirements, and at the same time improve the support strength, this application proposes the following technical solutions for the above technical problems, specifically: As Figures 4 to 7 shown, the first airbag 220 is provided with two layers, including an inner layer bag 221 and an outer layer bag 222; The inner layer bag 221 is sleeved outside the support rod 210 and is used to support the inner wall of the pipe fitting by expansion; The outer layer bag 222 is fixed outside the inner layer bag 221 and a first magnetic fluid 230 is contained therein, and is used to realize the switching between the flexible self-adaptation and the rigid support of the first airbag 220 through electromagnetic control, so as to meet the support requirements of different pipe fittings.

[0039] According to the rigid requirements and cutting requirements of the pipe fittings, the present application utilizes the rheological properties of the magnetorheological fluid-230 to switch the outer bladder 222 to a rigid support mode to ensure the accuracy and stability of cutting; while when clamping or releasing the pipe fittings, the outer bladder 222 can be switched to a flexible adaptive mode to avoid unnecessary damage or deformation to the pipe fittings; through the synergistic effect of the double-layer structure of the inner bladder 221 and the outer bladder 222, the inner bladder 221 provides the basic support shape, and the outer bladder 222 realizes the flexible switching of the support mode through the rheological properties of the magnetorheological fluid-230, enabling the airbag-220 to flexibly adjust its support mode as a whole according to different cutting stages and support strength requirements, not only ensuring the precise position and shape of the pipe fittings during the cutting process, but also improving the stability during the cutting process and reducing the cutting errors caused by vibration or deformation, reducing the damage or deformation to the pipe fittings when clamping or releasing the pipe fittings, and improving the flexibility and safety of the operation.

[0040] Embodiment 3 Since the magnetorheological fluid-230 is in a liquid state, the magnetorheological fluid-230 can flow freely in the outer bladder 222, and uneven distribution may occur due to its own gravity, so the support strength at the cutting position of the pipe fittings may be insufficient due to vibration during cutting. In view of the above technical problems, the present application proposes the following technical solutions, specifically: As Figures 5 to 7 shown, the inner bladder 221 is communicated with an external air pump I through a pipeline. The internal space of the inner bladder 221 is divided into a plurality of bladder cavities I 223. The bladder cavities I 223 are of an annular structure and the volume after expansion decreases sequentially along the direction away from the vertical plate 130. By inflating the inner bladder 221, the bladder cavities I 223 are inflated step by step, so that the magnetorheological fluid-230 in the outer bladder 222 is extruded to the cutting position of the pipe fittings, realizing precise positioning and fixed-point rigid support for the cutting position of the pipe fittings.

[0041] A plurality of sensors I 150 are uniformly fixed on the outer side wall of the outer bladder 222 along its circumference for monitoring the support strength of the inner wall of the pipe fittings. The sensors I 150 are in contact with the inner wall of the pipe fittings and cooperate with the external air pump I to jointly regulate the support strength of the inner wall of the pipe fittings.

[0042] The external air pump I is used to introduce gas into the inner bladder 221 to make it expand and support the inner wall of the pipe fittings, preferably a SUPF_XT gas booster pump; the sensors I 150 are used to monitor the support strength of the inner wall of the pipe fittings, preferably strain gauge pressure sensors, which have high precision, fast response and good environmental adaptability and are suitable for measuring small pressure changes; both are prior arts and will not be elaborated here.

[0043] In this application, by dividing the inner bladder 221 into multiple first bladder cavities 223 and inflating them step by step, the distribution of the first magnetic fluid 230 in the outer bladder 222 can be precisely controlled. Since the volume of the first bladder cavities 223 decreases step by step, when inflating, the first magnetic fluid 230 can be extruded step by step in the direction gradually away from the corresponding vertical plate 130, realizing the directional movement of the first magnetic fluid 230 and the fixed-point support for the cutting position of the pipe fitting, thus avoiding the problem of uneven distribution of the first magnetic fluid 230 due to its own gravity, ensuring that the first magnetic fluid 230 can be concentrated at the cutting position of the pipe fitting, providing a stable supporting force, and also avoiding the problems of uneven distribution or over-extrusion of the first magnetic fluid 230 that may be caused by sudden large-area extrusion, making the application of the supporting force more stable and controllable, and improving the stability and safety of the cutting process.

[0044] Meanwhile, as the first magnetic fluid 230 hardens, a rigid support is formed by the first magnetic fluid 230 at the cutting position, effectively preventing the vibration and deformation of the pipe fitting during the cutting process. This fixed-point rigid support improves the cutting accuracy and stability, ensuring the quality of the pipe orifice after cutting; multiple first sensors 150 uniformly fixed on the outer side wall of the outer bladder 222 can accurately sense the support strength of the inner wall of the pipe fitting. These first sensors 150 cooperate with an external air pump one, can real-time feedback the support strength information, and can be adjusted according to needs. This microscopic feedback and regulation mechanism ensures the precise control of the support strength, further improving the cutting accuracy and stability.

[0045] Embodiment 4 Considering that when cutting some pipe fittings with relatively thin thickness or low rigidity, the pipe fitting is softened by heat during cutting and may have slight deformation after cutting. The cutting wheel 113 rotates to generate radial vibration, resulting in dynamic deformation of the pipe fitting, lacking the ability to dynamically adjust the overall deformation of the pipe fitting and unable to straighten the deformed pipe orifice. For the above technical problems, this application proposes the following technical solutions, specifically: As Figures 6 to 11 shown, a second airbag 310 that cooperates with the first airbag 220 is fixed on the outer side of the arc plate 122. The second airbag 310 is an arc-shaped structure, including a regulation bladder 311 and a support bladder 312; The regulation bladder 311 is an arc-shaped structure and is fixed on the outer arc surface of the arc plate 122; the support bladder 312 is fixed on the outer side of the regulation bladder 311 and a second magnetic fluid 320 is arranged inside it.

[0046] The support bladder 312 communicates with an external air pump two through a pipeline; the interior of the support bladder 312 is divided into multiple second bladder cavities 313, and the second bladder cavities 313 are circumferentially arranged along the outer arc surface of the arc plate 122, and are used to make it fit the clamping of different pipe diameters by controlling different degrees of expansion of the second bladder cavities 313 at different positions.

[0047] A plurality of second sensors 160 are arranged along the radial direction of the outer arc surface of the support bladder 312. The second sensors 160 are opposite to the second bladder cavity 313 in position. The pressures at different positions of the pipe fitting are sensed by the second sensors 160 at different positions, and then the expansion degree of the second bladder cavity 313 at the corresponding position is controlled, so as to optimize the distribution of the second magnetorheological fluid 320 in the support bladder 312. In cooperation with the first sensor 150, the first bladder cavity 223 and the first magnetorheological fluid 230, the slight bending deformation of the cut of the pipe fitting is straightened.

[0048] The straightening control process of the first sensor 150 and the second sensor 160 is as follows: Step 1: After the support assembly 200 and the clamping mechanism 120 support and clamp the pipe fitting, the first sensor 150 and the second sensor 160 start to monitor the support strength of the inner wall and the outer wall of the pipe fitting, and the external control system presets the safety ranges of the support strength and the clamping force. Step 2: The first sensor 150 and the second sensor 160 feedback the monitored data to the external control system in real time. When the first sensor 150 monitors that the support strength of the inner wall of the pipe fitting is insufficient, the external control system sends a signal to the external first air pump to increase the inflation amount of the first air bladder 220, so that the first magnetorheological fluid 230 is extruded to the cut of the pipe fitting for fixed-point support; at the same time, when the second sensors 160 at different positions monitor that the clamping force at a certain place on the outer wall of the pipe fitting is too large, the external control system sends a signal to the external second air pump and adjusts the expansion amount of the second bladder cavity 313 at the corresponding position to reduce the clamping force at the corresponding position to adapt to the pipe fitting. The two cooperate with each other to fix the cutting position of the pipe fitting. Step 3: The hardening degrees of the first magnetorheological fluid 230 and the second magnetorheological fluid 320 are respectively controlled by controlling the external magnetic field intensity to provide support and clamping. Step 4: After the first sensor 150 and the second sensor 160 detect that the cut of the pipe fitting has a slight deformation, the first magnetorheological fluid 230 and the second magnetorheological fluid 320 are softened by controlling the external magnetic field intensity, and then the detected deformation data is transmitted to the external control system. The external control system sends signals to the external first air pump and the external second air pump. The external first air pump and the external second air pump respectively control the expansion amounts of the first bladder cavity 223 and the second bladder cavity 313, regulate the distributions of the first magnetorheological fluid 230 and the second magnetorheological fluid 320 according to the deformation data, and at the same time, under the control of the external magnetic field intensity, along with the movement and hardening of the first magnetorheological fluid 230 and the second magnetorheological fluid 320, the slight deformation at the cut of the pipe fitting is straightened together until it is straightened to the initial state. Step 5: After the first sensor 150 and the second sensor 160 detect that the cut of the pipe fitting has returned to the initial state, the external magnetic field is controlled to return to the initial state. At the same time, the external control system controls the external first air pump and the external second air pump to return to the initial state.

[0049] The external air pump 1, external air pump 2, sensor 1 150, and sensor 2 160 are all controlled by an external control system. The monitoring data of sensor 1 150 and sensor 2 160 are real-time fed back to the external control system for adjusting the inflation degree of airbag 1 220 and the clamping force of the clamping mechanism 120.

[0050] Sensor 1 150 is used to monitor the clamping strength of the outer wall of the pipe fitting and the deformation of the pipe wall, preferably a strain gauge pressure sensor; both sensor 1 150 and sensor 2 160 are controlled by an external control system, preferably a PLC programmable logic controller; both are prior arts and will not be elaborated here.

[0051] In this embodiment, through the cooperation of sensor 2 160, sensor 1 150, external air pump 1, and external air pump 2, the air chambers 2 of different positions expand to different degrees, and the air chamber 1 223 expands step by step, thereby optimizing the distribution of magnetorheological fluid 1 230 in the outer layer bladder 222 and magnetorheological fluid 2 320 in the support bladder 312, enabling magnetorheological fluid 1 230 to support and straighten the cut of the pipe fitting while adapting to the shape and size of the pipe diameter (because magnetorheological fluid 1 230 can translate and harden towards the cut of the pipe fitting during the process of gathering at the cut of the pipe orifice and gradually hardening, thereby straightening the slightly curved cut pipe orifice).

[0052] At the same time, due to the hardening of magnetorheological fluid 2 320 in different regions of the support bladder 312, it can adapt to the initial radian of the originally slightly curved cut of the pipe fitting, and cooperate with the hardening support of magnetorheological fluid 1 230, be able to cooperate with the hardening support of magnetorheological fluid 1 230, adapt to the slightly curved shape at the cut of the pipe fitting, and perform three-dimensional straightening on the bent part of the cut pipe orifice; by controlling the gas content in the air chambers 2 of different positions, the distribution of magnetorheological fluid 2 320 in the outer support bladder 312 can be optimized, making it applicable to the straightening of slightly bent pipe fittings and restoring their initial straightness or degree of bending.

[0053] In this application, through the combined use of airbag 2 310 and magnetorheological fluid 2 320, an airbag-magnetorheological fluid composite structure is integrated on the clamping surface. By adjusting the deformation of the flexible contact surface through air pressure and combining magnetic field directional hardening, the three stages of dynamic pressure application - straightening - locking are coordinated to achieve precise support and straightening of the outer wall of the pipe fitting; through the internal regulation bladder 311 and support bladder 312, precise deformation can be achieved according to the gas content in the air chambers 2 of different positions, thereby adapting to the outer wall shape of the pipe fitting. At the same time, the distribution of magnetorheological fluid 2 320 in the support bladder 312 is precisely controlled by the magnetic field, and can form a rigid support for the outer wall of the pipe fitting at the microscopic level, effectively preventing the deformation of the pipe fitting during the cutting process.

[0054] When the magnetorheological fluid-230 aggregates at the cut of the pipe fitting and gradually hardens, it can not only provide sufficient supporting force, but also translate and harden towards the cut of the pipe fitting, straightening the slightly bent cut pipe orifice, ensuring higher flatness and stability of the cut pipe orifice.

[0055] Through the sensor-150 and the sensor-2 160, the supporting strength, position and other parameters of the inner and outer walls of the pipe fitting can be accurately sensed at the microscopic level. These sensors cooperate with the external air pump-1 and the external air pump-2, can real-time feedback various parameters during the cutting process, and can be adjusted according to needs. This microscopic feedback and regulation mechanism ensures the precise control of the supporting strength, further improving the cutting accuracy and stability; By controlling the gas content in the cavity-2 313 at different positions, the distribution of the magnetorheological fluid-2 320 in the outer supporting bladder 312 can be optimized, making it suitable for straightening the slightly bent pipe fitting, ensuring that the magnetorheological fluid-2 320 can accurately adapt to the bending degree of the pipe fitting, realizing three-dimensional straightening, and improving the quality of the cut pipe fitting.

[0056] It should be noted that in the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A cutting device for processing ductile iron pipes, comprising a base (100), a cutting mechanism (110) for cutting pipe fittings, and a clamping mechanism (120) for fixedly clamping pipe fittings. Two vertical plates (130) are fixed on the base (100), and it is characterized in that, The vertical plates (130) are arranged left and right, and support components (200) for supporting the inner wall of the pipe fittings are fixed on one side of each of them close to the cutting mechanism (110), and the two support components (200) are arranged in a mirror image; The support component (200) includes a support rod (210) and an airbag I (220); the support rod (210) is a telescopic adjustment structure and is fixed on the corresponding vertical plate (130); the airbag I (220) is an annular structure and is sleeved outside the telescopic end of the support rod (210), and realizes the support for the inner wall of the pipe fitting through inflation and expansion.

2. The cutting equipment for processing ductile iron pipes according to claim 1, characterized in that, The cutting mechanism (110) includes a cutting bracket (111), an electric telescopic rod (112), a cutting wheel (113) and a cushion table (114); The cutting bracket (111) is a U-shaped structure and is fixed on the base (100); the cutting wheel (113) is fixed on the cutting bracket (111) through the electric telescopic rod (112) and is used for cutting the pipe fitting; the cushion table (114) is fixed below the cutting bracket (111) and is used for supporting the cutting part of the pipe fitting.

3. A cutting device for processing ductile iron pipes as described in claim 1, characterized in that, There are two sets of clamping mechanisms (120), which are arranged in a left-right mirror image. Each set of clamping mechanisms (120) includes two clamping mechanisms (120) arranged in a front-back mirror image. The clamping mechanism (120) includes a clamping rod (121) and an arc plate (122); The clamping rod (121) is a telescopic adjustment structure and is fixed on the vertical plate (130); the arc plate (122) is fixed at the telescopic end of the clamping rod (121) and is used for clamping the pipe fitting from the outside.

4. A cutting device for processing ductile iron pipes as described in claim 1, characterized in that, The airbag I (220) has two layers, including an inner layer bag (221) and an outer layer bag (222); The inner layer bag (221) is sleeved outside the support rod (210) and is used for realizing the support for the inner wall of the pipe fitting through expansion; the outer layer bag (222) is fixed outside the inner layer bag (221) and a magnetic fluid I (230) is contained therein, and is used for realizing the switching between the flexible self-adaptation and the rigid support of the airbag I (220) through electromagnetic control, so as to meet the support requirements of different pipe fittings.

5. The cutting device for processing ductile iron pipes according to claim 4, characterized in that, The inner layer bag (221) is communicated with an external air pump I through a pipeline. The inner space of the inner layer bag (221) is divided into a plurality of chamber bags I (223). The chamber bags I (223) are annular structures and the volume after expansion decreases successively along the direction away from the vertical plate (130). By inflating the inner layer bag (221), the chamber bags I (223) are inflated step by step, so that the magnetic fluid I (230) in the outer layer bag (222) is extruded to the pipe fitting cutting position, realizing the precise positioning and fixed-point hard support for the pipe fitting cutting part.

6. The cutting device for processing ductile iron pipes according to claim 5, characterized in that, A plurality of sensors I (150) are uniformly fixed on the outer side wall of the outer layer bag (222) along its circumference and are used for monitoring the support strength of the inner wall of the pipe fitting. By contacting the inner wall of the pipe fitting through the sensors I (150) and cooperating with the external air pump I, the support strength of the inner wall of the pipe fitting is jointly regulated.

7. The cutting device for processing ductile iron pipes according to claim 3, characterized in that, An airbag II (310) matched with the airbag I (220) is fixed on the outer side of the arc plate (122). The airbag II (310) is an arc-shaped structure and includes a regulation bag (311) and a support bag (312); The regulating bladder (311) is an arc-shaped structure and is fixed on the outer arc surface of the arc plate (122); the supporting bladder (312) is fixed on the outside of the regulating bladder (311), and a second magnetic fluid (320) is arranged inside it.

8. The cutting equipment for processing ductile iron pipes according to claim 7, characterized in that, The supporting bladder (312) communicates with an external second air pump through a pipeline; the interior of the supporting bladder (312) is divided into a plurality of second bladder cavities (313), and the second bladder cavities (313) are circumferentially arranged in an array along the outer arc surface of the arc plate (122) and are used to make it fit different pipe diameters by controlling different degrees of expansion of the second bladder cavities (313) at different positions.

9. The cutting device for processing ductile iron pipes according to claim 8, characterized in that, A plurality of second sensors (160) are arranged on the outer arc surface of the supporting bladder (312) along its radial direction. The second sensors (160) are opposite to the positions of the second bladder cavities (313). The pressures at different positions of the pipe fittings are sensed by the second sensors (160) at different positions, and then the expansion degrees of the corresponding second bladder cavities (313) are controlled to optimize the distribution of the second magnetic fluid (320) in the supporting bladder (312). In cooperation with the first sensor (150), the first bladder cavity (223) and the first magnetic fluid (230), the slight bending deformation of the cutting opening of the pipe fitting is straightened.

10. A cutting device for processing ductile iron pipes as described in claim 9, characterized in that, The straightening regulation process of the first sensor (150) and the second sensor (160) is as follows: Step 1: After the supporting assembly (200) and the clamping mechanism (120) support and clamp the pipe fitting, the first sensor (150) and the second sensor (160) start to monitor the supporting strength of the inner wall and the outer wall of the pipe fitting, and the external control system presets the safety ranges of the supporting strength and the clamping force. Step 2: The first sensor (150) and the second sensor (160) transmit the monitored data to the external control system in real time. When the first sensor (150) monitors that the supporting strength of the inner wall of the pipe fitting is insufficient, the external control system sends a signal to the external first air pump to increase the inflation amount of the first air bladder (220), so that the first magnetic fluid (230) is extruded to the cutting position of the pipe fitting for fixed-point support; at the same time, when the second sensors (160) at different positions monitor that the clamping force at a certain place on the outer wall of the pipe fitting is too large, the external control system sends a signal to the external second air pump and adjusts the expansion amount of the corresponding second bladder cavity (313) to reduce the clamping force at the corresponding position to adapt to the pipe fitting. The two cooperate together to fix the cutting position of the pipe fitting. Step 3: The hardening degrees of the first magnetic fluid (230) and the second magnetic fluid (320) are respectively controlled by controlling the external magnetic field intensity to provide support and clamping. Step Four: After sensors one (150) and two (160) detect slight deformations at the pipe fitting cutting opening, control the softening of ferrofluid one (230) and ferrofluid two (320) by controlling the external magnetic field intensity. Then, transmit the detected deformation data to the external control system. The external control system sends signals to external air pump one and external air pump two. External air pump one and external air pump two respectively control the expansion amounts of cavity one (223) and cavity two (313), regulate the distributions of ferrofluid one (230) and ferrofluid two (320) according to the deformation data. At the same time, under the control of the external magnetic field intensity, along with the movement and hardening of ferrofluid one (230) and ferrofluid two (320), jointly straighten the slight deformation at the pipe fitting cutting opening until it is straightened back to the initial state; Step Five: After sensors one (150) and two (160) detect that the pipe fitting cutting opening has returned to the initial state, control the external magnetic field to return to the initial state. At the same time, the external control system controls external air pump one and external air pump two to return to the initial state.

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