Pipe forming extrusion state measuring device, monitoring system and monitoring method

Abstract

The invention relates to a pipe forming extrusion state measuring device, a monitoring system and a monitoring method, and the vertical measuring rods can slide on a slide rail, so that the two vertical measuring rods can be placed in a forming extrusion angle, and meanwhile, the vertical measuring rods can be always in contact with the curled edge of a pipe through cooperation with the use of an elastic part. Then the distance between two measuring points where the vertical measuring rod is in contact with the curled edge of the pipe can be detected in cooperation with a distance detection assembly; the forming extrusion angle can be calculated by measuring the distance and then knowing the fixed distance between the measuring point and the joint closing point, and the measuring device enables the measuring point to be far away from the joint closing point, namely the position near a high-temperature welding point, so that safety accidents caused by manually measuring the joint closing angle near the high-temperature welding point in the forming process are avoided; in addition, the obtained real-time forming extrusion angle is compared with the design allowable range, the forming state can be visually detected, an adjusting scheme can be obtained in real time, and real-time measurement, real-time monitoring and real-time adjustment under the pipe advancing state are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of tube forming, and in particular to a tube forming extrusion state measuring device, a monitoring system and a monitoring method. Background Art

[0002] In the high-frequency hydrogen pipe production industry, when the strip steel is fed into the forming extrusion roller, the quality of the extrusion directly determines the quality of the high-frequency welding weld. If the extrusion roller extrudes too much, it will cause the welding to have overburning quality defects. If the extrusion roller extrudes insufficiently, it will cause the welding to have cold welding quality defects.

[0003] In some related technologies, the extrusion angle needs to be measured during the extrusion molding process, and then the position of the relevant extrusion rollers is adjusted according to the extrusion angle. At the same time, high-temperature welding is required during the extrusion molding process, that is, the extruded steel pipe is in a forward state, and the extrusion V angle (molding extrusion angle) on the steel pipe needs to be measured. However, the extrusion V angle is near the high-temperature welding point, which leads to safety hazards in manual measurement of the V angle. In addition, the existing measuring device is difficult to perform real-time measurement when the steel pipe is in a forward state. Summary of the invention

[0004] The embodiments of the present application provide a tube forming extrusion state measuring device, a monitoring system and a monitoring method to solve the problem in the related art that the forming extrusion angle is difficult to detect because the forming extrusion angle is near a high-temperature welding point.

[0005] In a first aspect, a device for measuring a tube forming extrusion state is provided, comprising:

[0006] A slide rail is provided with two vertical measuring rods which are arranged at intervals and move along its length direction, and the bottom of the vertical measuring rods is used to contact the curled edge of the pipe; baffles are respectively provided at both ends of the slide rail;

[0007] An elastic member, which is parallel to the slide rail and installed between two vertical measuring rods;

[0008] The distance detection component is connected to the baffle and is used to detect the distance between two measuring points where the vertical measuring rod contacts the curled edge of the pipe.

[0009] In some preferred embodiments, the distance detection component includes a linear displacement sensor arranged parallel to the slide rail, and the linear displacement sensor has two movable detection blocks, and the two movable detection blocks are respectively connected to the tops of the two vertical measuring rods.

[0010] In some preferred embodiments, the two ends of the linear displacement sensor are respectively connected to the two baffles, and the linear displacement sensor is a hysteresis micro-pulse displacement sensor; the moving detection block is a magnetic block;

[0011] The linear displacement sensor is used to detect the distances between the two magnetic blocks and the set reference ends of the linear displacement sensor.

[0012] In some preferred embodiments, a roller for rolling contact with the curled edge of the pipe is provided at the bottom of the vertical measuring rod; and the vertical measuring rod is slidably connected to the slide rail via a slider.

[0013] In some preferred embodiments, the slide rail is further provided with positioning holes located between the sliders, and the sliders are provided with positioning pins plugged into the positioning holes.

[0014] Some preferred embodiments further include a vertical moving assembly, which is connected to the baffle and is used to vertically lift or lower the baffle.

[0015] In a second aspect, a method for monitoring a tube forming extrusion state is provided, which comprises the following steps:

[0016] The real-time forming extrusion angle is calculated using the detection data of the tube forming extrusion state measuring device and the production data;

[0017] Compare the real-time forming extrusion angle with the design allowable range;

[0018] If it is within the design allowable range, the molding extrusion state is normal; otherwise, the molding extrusion state is abnormal.

[0019] In some preferred embodiments, after monitoring that the molding extrusion state is abnormal, the following steps are further performed:

[0020] If the real-time forming extrusion angle is less than the minimum value of the design allowable range, the extrusion roller adjustment distance 1 is calculated using the design formula 1, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 1 respectively, so that the distance between the two extrusion rollers close to the forming extrusion angle is increased;

[0021] If the real-time forming extrusion angle is greater than the maximum value of the design allowable range, the extrusion roller adjustment distance 2 is calculated using the design formula 2, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 2, so that the distance between the two extrusion rollers close to the forming extrusion angle is reduced;

[0022] The formula 1 is: S7=S6×[tan(0.5α1)-tan(0.5α)];

[0023] The second formula is: S8 = S6 × [tan (0.5α) - tan (0.5α2)];

[0024] Among them, S6 is the production data, S7 is the extrusion roller adjustment distance one, S8 is the extrusion roller adjustment distance two, α1 is the minimum value of the design allowable range, α2 is the maximum value of the design allowable range, and α is the real-time molding extrusion angle.

[0025] In some preferred embodiments, the production data is the distance between the joint point and the midpoint of the line connecting the measuring points in the moving direction of the pipe; the line connecting the measuring points is the line connecting the measuring points of the two vertical measuring rods after the position of the measuring device for the forming extrusion state of the pipe is fixed;

[0026] The real-time forming extrusion angle is calculated using the test data and production data, including the following steps:

[0027] First, use Formula 3 to calculate the measurement angle, and then use Formula 4 to calculate the molding extrusion angle;

[0028] The formula three is:

[0029] tanβ=0.5×S3 / S6, where tanβ is the measurement angle, S3 is the distance between the two measurement points corresponding to the two vertical measuring rods, and S6 is the production data;

[0030] The formula 4 is: α=2×arctanβ, where α is the real-time molding extrusion angle.

[0031] In a third aspect, a pipe forming extrusion state monitoring system is provided, which includes:

[0032] The first module is used to calculate the real-time forming extrusion angle by using the detection data of the tube forming extrusion state measuring device and the production data;

[0033] The second module is used to compare the real-time forming extrusion angle with the design allowable range; if it is within the design allowable range, the forming extrusion state is a normal state; otherwise, the forming extrusion state is an abnormal state.

[0034] The beneficial effects of the technical solution provided by this application include:

[0035] The embodiments of the present application provide a device, a monitoring system and a monitoring method for measuring the forming and extrusion state of a pipe. Since the vertical measuring rods can slide on the slide rails, the two vertical measuring rods can be placed in the forming and extrusion angle. At the same time, the use of elastic parts can ensure that the vertical measuring rods are always in contact with the curled edge of the pipe. Then, the distance detection component can be used to detect the distance between the two measuring points where the vertical measuring rods are in contact with the curled edge of the pipe. The forming and extrusion angle can be calculated by knowing the fixed distance between the measuring point and the joint point through the measured distance. The above measuring device keeps the measuring point away from the joint point, that is, near the high-temperature welding point, so as to avoid safety accidents caused by manually measuring the joint angle near the high-temperature welding point during the forming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of the structure of a device for measuring the tube forming extrusion state provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the extrusion rollers, seam points and measurement points in the tube forming extrusion state provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of calculating the extrusion forming angle provided in an embodiment of the present application;

[0040] Figure 4 This is the electrical control structure diagram corresponding to the tube forming extrusion state monitoring system provided in the embodiment of the present application.

[0041] In the figure: 1. slide rail; 2. slider; 3. vertical measuring rod; 4. baffle; 5. elastic member; 6. linear displacement sensor; 600, moving detection block; 7. roller; 8. positioning hole; 9. vertical moving component. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The embodiments of the present application provide a device, a monitoring system and a monitoring method for measuring the forming and extrusion state of a pipe, so as to solve the problem in the related art that the forming and extrusion angle is difficult to detect because the forming and extrusion angle is near a high-temperature welding point.

[0044] It should be understood that the adjustment of the forming extrusion rollers in the industry basically relies on manually measuring the extrusion angle with an angle ruler, and manually adjusting the position of the relevant extrusion rollers according to the result. This method has a low level of automation. In this manual measurement process, the steel pipe is in a forward state and the measured extrusion V angle is near the high-temperature welding point. Manually measuring the joint angle near the high-temperature welding point is prone to safety accidents. Therefore, there is a pipe forming extrusion state measurement device.

[0045] In the actual tube forming process, there are four main squeeze rollers, such as Figure 2 The extrusion rollers 1, 2, 3 and 4 are shown. Before extrusion, the operator moves the positions of the extrusion rollers 3 and 4, the positions of the extrusion rollers 1 and 2, and adjusts the position of the joint point A. After the position of the joint point A is adjusted, the positions of the extrusion rollers 3 and 4 remain unchanged, and the position of point A remains unchanged. The extrusion rollers 1, 2, 3 and 4 are marked as E, F, G and H respectively in the figure; the pipe material is I.

[0046] See also Figure 1 , a tube forming extrusion state measuring device, comprising:

[0047] The slide rail 1 is provided with two vertical measuring rods 3 which are arranged at intervals and move along the length direction thereof, and the bottom of the vertical measuring rods 3 is used to contact the curled edge of the pipe; baffles 4 are respectively provided at both ends of the slide rail 1; an elastic member 5 is parallel to the slide rail 1 and installed between the two vertical measuring rods 3; a distance detection assembly is connected to the baffle 4 and is used to detect the distance between the two measuring points where the vertical measuring rod 3 contacts the curled edge of the pipe. The vertical measuring rod 3 is slidably connected to the slide rail 1 through a slider 2.

[0048] The vertical measuring rod 3 can slide on the slide rail 1, so that the two vertical measuring rods 3 can be placed in the forming extrusion angle. At the same time, the use of the elastic member 5 can ensure that the vertical measuring rod 3 is always in contact with the curled edge of the pipe. Then, the distance detection component can be used to detect the distance between the two measuring points where the vertical measuring rod 3 contacts the curled edge of the pipe. The forming extrusion angle can be calculated by knowing the fixed distance between the measuring point and the joint point A through the measured distance. The above measuring device keeps the measuring point away from the joint point, that is, the high-temperature welding point, so as to avoid the influence of the high-temperature welding point on the forming extrusion angle during the forming process.

[0049] Among them, the two measuring points where the vertical measuring rod 3 contacts the curled edge of the pipe are Figure 1 and Figure 2 The measuring points B and C shown, the positions of which are also fixed relative to the joint point A.

[0050] In some preferred embodiments, the structure of the distance detection component is described in detail:

[0051] The distance detection component includes a linear displacement sensor 6 arranged parallel to the slide rail 1 . The linear displacement sensor 6 has two moving detection blocks 600 . The two moving detection blocks 600 are respectively connected to the tops of the two vertical measuring rods 3 .

[0052] The above structure can make the mobile detection block 600 move with the movement of the vertical measuring rod 3; wherein the two ends of the linear displacement sensor 6 are respectively connected to the two baffles 4, and it is a hysteresis micro-pulse displacement sensor; the mobile detection block 600 is a magnetic block; the linear displacement sensor 6 is used to detect the distance between the two magnetic blocks and the set reference end of the linear displacement sensor 6.

[0053] In this embodiment, Figure 1 and Figure 2 For example, one of the moving detection blocks 600 obtains a real-time distance S1 from the left end of the body of the linear displacement sensor 6, and the other moving detection block 600 obtains a real-time distance S2 from the left end of the body of the linear displacement sensor 6. Figure 1 In the figure, the distance S3 between the two points B and C of the curled edge of the steel plate measured by the device is S2-S1+R, where R is the diameter of the vertical measuring rod.

[0054] Furthermore, in order to achieve real-time measurement while the steel pipe is moving forward and reduce the friction loss of the vertical measuring rod 3, a roller 7 for rolling contact with the curled edge of the pipe is provided at the bottom of the vertical measuring rod 3. Then R corresponds to the diameter of the roller 7 at this time.

[0055] Furthermore, in order to facilitate the placement of the vertical measuring rod 3 into the strip without a seam, a positioning hole 8 located between the sliders 2 is provided on the slide rail 1, and a positioning pin plugged into the positioning hole 8 is provided on the slider 2; the positioning pin can fix the slider 2 in the initial position, and the setting of the initial position must ensure that the distance between the sliders is smaller than the distance between the measuring points B and C when producing the minimum pipe diameter.

[0056] In some preferred embodiments, in order to facilitate the up and down movement of the tube forming extrusion state measuring device, the following settings are provided:

[0057] It also includes a vertical moving assembly 9, which is connected to the baffle 4 and is used to vertically lift or lower the baffle 4. The vertical moving assembly 9 includes a vertically arranged electric linear module, and a nut slider of the electric linear module is connected to the baffle 4.

[0058] It should be noted that the vertical measuring rod 3 needs to be made of non-magnetic stainless steel to prevent interference from the magnetic block and magnetic field of the absolute hysteresis micro-pulse sensor. In actual production, the elastic member 5 is a compression spring, and the reverse tension of the compression spring makes the two rollers 7 respectively rest on the left and right curled edges of the strip. The compression spring can make the roller 7 close to the curled plate edge to sense the position changes of the measurement point B and the measurement point C on the curled edge of the steel plate in real time.

[0059] The present application also proposes a method for monitoring the state of tube forming extrusion, which comprises the following steps:

[0060] The real-time forming extrusion angle is calculated using the detection data of the tube forming extrusion state measuring device and the production data;

[0061] Compare the real-time forming extrusion angle with the design allowable range;

[0062] If it is within the design allowable range, the molding extrusion state is normal; otherwise, the molding extrusion state is abnormal.

[0063] The above can use the detection data of the tube forming extrusion state measuring device to judge the tube forming extrusion state in combination with other data, and can display the extrusion state in real time, intuitively and accurately, ultimately ensuring production quality. Real-time measurement, real-time monitoring and real-time adjustment are achieved under the state of tube advancement.

[0064] Of course, after monitoring that the molding extrusion state is abnormal, the following steps are also performed:

[0065] If the real-time forming extrusion angle is less than the minimum value of the design allowable range, the extrusion roller adjustment distance 1 is calculated using the design formula 1, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 1 respectively, so that the distance between the two extrusion rollers close to the forming extrusion angle is increased;

[0066] If the real-time forming extrusion angle is greater than the maximum value of the design allowable range, the extrusion roller adjustment distance 2 is calculated using the design formula 2, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 2, so that the distance between the two extrusion rollers close to the forming extrusion angle is reduced;

[0067] The formula 1 is: S7=S6×[tan(0.5α1)-tan(0.5α)];

[0068] The second formula is: S8 = S6 × [tan (0.5α) - tan (0.5α2)];

[0069] Among them, S6 is the production data, S7 is the extrusion roller adjustment distance one, S8 is the extrusion roller adjustment distance two, α1 is the minimum value of the design allowable range, α2 is the maximum value of the design allowable range, and α is the real-time molding extrusion angle.

[0070] Through the above steps, feedback control can be implemented according to the detected status and a specific plan can be executed. There is no production method that affects quality by adjusting according to empirical values.

[0071] In some preferred embodiments, the production data is the distance between the joint point and the midpoint of the line connecting the measuring points in the moving direction of the pipe; the line connecting the measuring points is the line connecting the measuring points of the two vertical measuring rods (3) after the position of the pipe forming extrusion state measuring device is fixed;

[0072] The real-time forming extrusion angle is calculated using the test data and production data, including the following steps:

[0073] First, use Formula 3 to calculate the measurement angle, and then use Formula 4 to calculate the molding extrusion angle;

[0074] The formula three is:

[0075] tanβ=0.5×S3 / S6, where tanβ is the measurement angle, S3 is the distance between the two measurement points corresponding to the two vertical measuring rods (3), that is, the distance between the measurement points B and C, and S6 is the production data;

[0076] The formula 4 is: α=2×arctanβ, where α is the real-time molding extrusion angle.

[0077] Embodiment 1

[0078] Below Figure 1 and Figure 2 Take the following example to explain the detailed calculation process of the molding extrusion angle:

[0079] ① One of the moving detection blocks (600) obtains in real time a distance S1 from the left end of the body of the linear displacement sensor (6), and the other moving detection block 600 obtains in real time a distance S2 from the left end of the body of the linear displacement sensor 6, then Figure 1 In the figure, the distance S3 between the two points B and C of the curled edge of the steel plate measured by the device is S2-S1+R, where R is the diameter of the vertical measuring rod.

[0080] ② According to the characteristics of the high-frequency hydrogen transmission pipe production line, the joint point A is usually set at Figure 2200mm to the right of the midpoint of the transverse axis of the middle extrusion roller three and four, the axis of the extrusion roller one and two is S4mm away from the axis of the extrusion roller three and four. The measuring device is installed S5mm to the right of the transverse axis of the extrusion roller one and two. Then, draw a perpendicular line from point A to the BC segment, and the distance S6=(S5+S4-200)mm. In actual production, S6 is a known value.

[0081] ③See Figure 3 The calculation principle diagram shown, the calculation method of the real-time measurement value of the forming extrusion angle α is:

[0082] tanβ=0.5×S3 / S6

[0083] α = 2 × arctan β.

[0084] Embodiment 2

[0085] (1) When adjusting the production of steel pipes for the same batch of orders, before the curled edge of the first pipe strip enters the measuring device of the present invention, the slider 2 of the present invention is first fixed in the initial position by the positioning pin, and the vertical moving component 9 is raised to the highest point by the operating table. When the strip enters the extrusion rollers 3 and 4 forward, the operator adjusts the position of the joint point A by moving the positions of the extrusion rollers 3 and 4 and the extrusion rollers 1 and 2. After the position of the joint point A is adjusted, the positions of the extrusion rollers 3 and 4 remain unchanged, and the position of point A remains unchanged.

[0086] (2) Based on step (1), the vertical moving assembly 9 is lowered by operating the buttons on the operating table so that the midpoint of the side of the roller 7 is roughly facing the left and right curled edges of the strip. Then, the positioning pin is released to compress the spring so that the roller 7 is close to the left and right curled edges of the strip.

[0087] (3) Then, the “allowable range of extrusion angle” is set on the touch screen to (α1, α2), and the production line welding is started. During the production process, the small range of plate width changes in the previous process causes Figure 1 The distance between the measuring points B and C changes within a small range. The roller 7 close to the points B and C in the patent device drives the magnetic block 7 in real time; the real-time extrusion angle α is obtained by using the "forming extrusion angle measurement calculation method".

[0088] (4) When the real-time extrusion angle α∈[10, 30], it is considered to be within the normal range.

[0089] (5) When α<α1, the PLC CPU of the electronic control part of the device issues a command to control the squeezing roller 1 and the squeezing roller 2 to move outward by S7mm respectively. The calculation formula of S7mm is as follows:

[0090] S7=S6×[tan(0.5α1)-tan(0.5α)]

[0091] (6) When α>α2, the PLC CPU of the electronic control part of the device issues a command to control the squeezing roller 1 and the squeezing roller 2 to move S8mm to the middle respectively. The calculation formula of S8mm is as follows:

[0092] S8=S6×[tan(0.5α)-tan(0.5α2)].

[0093] Embodiment 3

[0094] The electrical control part of this pipe forming extrusion state monitoring system can refer to Figure 4 The instructions shown: mainly show how to control the moving squeezing roller.

[0095] The hysteresis micro-pulse displacement sensor is connected to a PN interface of the PLC1500 CPU via a PN cable, another PN interface of the PLC1500 CPU is connected to the touch screen via a PN cable, the touch screen is connected to the No. 1 electric module servo driver of the vertical moving component 9 via a PN cable, the No. 1 electric module servo driver is connected to the No. 2 electric module servo driver of the vertical moving component 9 via a PN cable, and the No. 1 and No. 2 electric module servo drivers are respectively connected to the No. 1 and No. 2 electric module motors of the vertical moving component 9 via power cables.

[0096] The PLC1500 CPU is connected to the PLC DI / DO module through the backplane bus, the PLC DI / DO module console is connected to the PLC AI module through the backplane bus, the PLC AI module is connected to the PLC AO module through the backplane bus, and the console is connected to the PLC DI / DO module through a signal cable.

[0097] The displacement sensor of squeeze roller one, the displacement sensor of squeeze roller two, the displacement sensor of squeeze roller three, and the displacement sensor of squeeze roller four are all connected to the PLC AI module through signal cables, the hydraulic control amplifier board 1, the hydraulic control amplifier board 2, the hydraulic control amplifier board 3, and the hydraulic control amplifier board 4 are all connected to the PLC AO module through signal cables, and the hydraulic control valve of squeeze roller one, the hydraulic control valve of squeeze roller two, the hydraulic control valve of squeeze roller three, and the hydraulic control valve of squeeze roller four are respectively connected to the hydraulic control amplifier board 1, the hydraulic control amplifier board 2, the hydraulic control amplifier board 3, and the hydraulic control amplifier board 4 through signal cables.

[0098] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0099] It should be noted that, in this application, 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0100] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A device for measuring the state of tube forming and extrusion, characterized in that: It includes: A slide rail (1) is provided with two vertical measuring rods (3) arranged at intervals and movable along its length direction, the bottom of the vertical measuring rods (3) being used to contact the curled edge of the pipe; baffles (4) are respectively provided at both ends of the slide rail (1); An elastic member (5) parallel to the slide rail (1) and installed between the two vertical measuring rods (3); The distance detection component is connected to the baffle (4) and is used to detect the distance between two measuring points where the vertical measuring rod (3) contacts the curled edge of the pipe.

2. The device for measuring the tube forming and extrusion state according to claim 1, characterized in that: The distance detection component comprises a linear displacement sensor (6) arranged parallel to the slide rail (1), the linear displacement sensor (6) having two moving detection blocks (600), and the two moving detection blocks (600) are respectively connected to the tops of the two vertical measuring rods (3).

3. The tube forming extrusion state measuring device according to claim 2, characterized in that: The two ends of the linear displacement sensor (6) are respectively connected to the two baffles (4), and the linear displacement sensor (6) is a hysteresis micro-pulse displacement sensor; the moving detection block (600) is a magnetic block; The linear displacement sensor (6) is used to detect the distances between the two magnetic blocks and the set reference ends of the linear displacement sensor (6).

4. The device for measuring the tube forming extrusion state according to claim 1, characterized in that: A roller (7) for rolling contact with the curled edge of the pipe is provided at the bottom of the vertical measuring rod (3); the vertical measuring rod (3) is slidably connected to the slide rail (1) via a slider (2).

5. The device for measuring the tube forming extrusion state according to claim 4, characterized in that: The slide rail (1) is also provided with a positioning hole (8) located between the sliders (2), and the slider (2) is provided with a positioning pin plugged into the positioning hole (8).

6. The device for measuring the tube forming extrusion state according to claim 1, characterized in that: It also comprises a vertical moving assembly (9), which is connected to the baffle (4) and is used to vertically lift or lower the baffle (4).

7. A method for monitoring the state of tube forming and extrusion, characterized in that: It includes the following steps: Calculate the real-time forming extrusion angle using the detection data and production data of the tube forming extrusion state measuring device according to any one of claims 1 to 6; Compare the real-time forming extrusion angle with the design allowable range; If it is within the design allowable range, the molding extrusion state is normal; Otherwise, the molding extrusion state is abnormal.

8. The method for monitoring the tube forming extrusion state according to claim 7, characterized in that: After monitoring that the molding extrusion state is abnormal, the following steps are performed: If the real-time forming extrusion angle is less than the minimum value of the design allowable range, the extrusion roller adjustment distance 1 is calculated using the design formula 1, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 1 respectively, so that the distance between the two extrusion rollers close to the forming extrusion angle is increased; If the real-time forming extrusion angle is greater than the maximum value of the design allowable range, the extrusion roller adjustment distance 2 is calculated using the design formula 2, and then the two extrusion rollers close to the forming extrusion angle are controlled to move the extrusion roller adjustment distance 2, so that the distance between the two extrusion rollers close to the forming extrusion angle is reduced; The formula 1 is: S7=S6×[tan(0.5α1)-tan(0.5α)]; The second formula is: S8 = S6 × [tan (0.5α) - tan (0.5α2)]; Among them, S6 is the production data, S7 is the extrusion roller adjustment distance one, S8 is the extrusion roller adjustment distance two, α1 is the minimum value of the design allowable range, α2 is the maximum value of the design allowable range, and α is the real-time molding extrusion angle.

9. The method for monitoring the tube forming extrusion state according to claim 7, characterized in that: The production data is the distance between the joint point and the midpoint of the line connecting the measuring points in the moving direction of the pipe; the line connecting the measuring points is the line connecting the measuring points of the two vertical measuring rods (3) after the position of the measuring device for the forming and extrusion state of the pipe is fixed; The real-time forming extrusion angle is calculated using the test data and production data, including the following steps: First, use Formula 3 to calculate the measurement angle, and then use Formula 4 to calculate the molding extrusion angle; The formula three is: tanβ=0.5×S3 / S6, where tanβ is the measurement angle, S3 is the distance between two measurement points corresponding to the two vertical measuring rods (3), and S6 is the production data; The formula 4 is: α=2×arctanβ, where α is the real-time molding extrusion angle.

10. A pipe forming extrusion state monitoring system, characterized in that: It includes: A first module, which is used to calculate a real-time forming extrusion angle using the detection data and production data of the tube forming extrusion state measuring device according to any one of claims 1 to 6; The second module is used to compare the real-time forming extrusion angle with the design allowable range; if it is within the design allowable range, the forming extrusion state is normal; Otherwise, the molding extrusion state is abnormal.

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