Grooving Machine

Abstract

The present disclosure relates to the technical field of pipe bevel machining, and particularly relates to a beveling machine. The beveling machine includes: a tensioning assembly, including a tensioning oil cylinder and a tensioning device, the tensioning oil cylinder is drivingly connected to the tensioning device to drive the tensioning device to contact the inner wall of the pipe when extending out to tension the pipe; and a monitoring device, coupled to the tensioning oil cylinder, for detecting the extension displacement b of the tensioning oil cylinder and the applied thrust F1, and determining the tensioning force T1 exerted by the tensioning assembly on the inner wall of the pipe according to the detected extension displacement b and thrust F1. Based on this, the risk of pipe damage caused by excessive tensioning force applied by the beveling machine can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pipe beveling machining, and particularly to a beveling machine. Background Art

[0002] A beveling machine is a special equipment for beveling a pipe before welding. During the working process, it contacts the inner wall of the pipe through a tensioning assembly to achieve tensioning and positioning.

[0003] In the related art, the beveling machine does not monitor the tensioning force applied by it, and often the tensioning force is too large, resulting in damage to the pipe. Summary of the Invention

[0004] One technical problem to be solved by the present disclosure is: to reduce the risk of pipe damage caused by excessive tensioning force applied by the beveling machine.

[0005] To solve the above technical problem, the present disclosure provides a beveling machine, which includes:

[0006] A tensioning assembly, including a tensioning oil cylinder and a tensioning device. The tensioning oil cylinder is drivingly connected to the tensioning device to drive the tensioning device to contact the inner wall of the pipe and tension the pipe when extending; and

[0007] A monitoring device, coupled with the tensioning oil cylinder, for detecting the extension displacement b of the tensioning oil cylinder and the applied thrust F 1 , and determining the tensioning force T applied by the tensioning assembly to the inner wall of the pipe according to the detected extension displacement b and thrust F 1 1 .

[0008] In some embodiments, the monitoring device includes:

[0009] An oil pressure sensor, for detecting the oil pressure in the tensioning oil cylinder. The monitoring device determines the thrust F according to the detection result of the oil pressure sensor 1 ; and / or,

[0010] A displacement sensor, for detecting the extension displacement b.

[0011] In some embodiments, the displacement sensor is a wire-drawing displacement sensor, and the wire of the wire-drawing displacement sensor is connected to the tensioning oil cylinder.

[0012] In some embodiments, the tensioning device includes a push rod. The first end of the push rod is connected to the tensioning oil cylinder, and the wire of the wire-drawing displacement sensor is connected to the second end of the push rod.

[0013] In some embodiments, the monitoring device includes a guide rod, and the wire of the wire-drawing displacement sensor is connected to the second end of the push rod through the guide rod.

[0014] In some embodiments, the tensioning device includes a connecting disk, a connecting rod, and a radial movement mechanism. The tensioning oil cylinder is drivingly connected to the connecting disk to drive the axial movement of the connecting disk. The first end and the second end of the connecting rod are respectively hinged to the connecting disk and the radial movement mechanism, so as to drive the radial movement of the radial movement mechanism when the connecting disk moves axially. The monitoring device determines the tensioning force T based on the following formula 1 :

[0015]

[0016] where A is the length of the connecting rod, and L 0 is the distance between the first end of the connecting rod and the radial movement mechanism in the telescopic direction of the tensioning oil cylinder at the start of tensioning.

[0017] In some embodiments, the beveling machine includes a display, which is signal-connected to the monitoring device for displaying the tensioning force T determined by the monitoring device 1 .

[0018] In some embodiments, the tensioning device includes:

[0019] a tensioning block having a working surface, which is the surface of the tensioning block facing the inner wall of the pipe; and

[0020] an elastic pad disposed on the working surface of the tensioning block such that the tensioning block contacts the inner wall of the pipe through the elastic pad.

[0021] In some embodiments, a boss is provided on the working surface, and a groove is provided on the elastic pad, and the boss is embedded in the groove.

[0022] In some embodiments, the elastic pad includes a first part, a second part, and a third part. The first part covers the working surface. The second part and the third part are connected to opposite ends of the first part and are both bent from the first part in a direction opposite to the protruding direction of the boss. The elastic pad is detachably connected to the tensioning block through the second part and the third part.

[0023] Due to the provided monitoring device, the tensioning force T applied by the tensioning assembly 1 can be monitored. Therefore, it is beneficial to reduce the risk of pipeline damage caused by excessive tensioning force applied by the beveling machine.

[0024] Other features and advantages of the present disclosure will become clear by the following detailed description of the exemplary embodiments of the present disclosure with reference to the accompanying drawings. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of the beveling machine in the embodiment of the present disclosure.

[0027] Figure 2 It is a schematic diagram of the structure of the tensioning mechanism in the embodiment of the present disclosure.

[0028] Figure 3 It is a schematic diagram of the combined structure of the tensioning block and the elastic pad in the embodiment of the present disclosure.

[0029] Figure 4 It is a schematic diagram of the structure of the tensioning block in the embodiment of the present disclosure.

[0030] Figure 5 It is a schematic diagram of the structure of the elastic pad in the embodiment of the present disclosure.

[0031] Figure 6 It is a schematic diagram of the arrangement of the tensioning block and the elastic pad on the tensioning disc in the embodiment of the present disclosure.

[0032] Figure 7 It is a mechanical model diagram of the tensioning assembly at the start of tensioning.

[0033] Figure 8 It is a mechanical model diagram of the tensioning assembly at the completion of tensioning.

[0034] Figure 9 It is a schematic diagram of the control principle of the embodiment of the present disclosure.

[0035] Explanation of reference numerals:

[0036] 100, beveling machine; 10, tensioning mechanism; 101, connecting cylinder; 102, tensioning assembly; 103, tensioning device; 104, radial moving mechanism; 20, cutting mechanism; 201, main shaft; 202, cutting disc; 30, feeding mechanism; 40, monitoring device; 401, guide rod; 402, displacement sensor; 403, oil pressure sensor; 404, controller; 405, wire rope displacement sensor; 50, display.

[0037] 1, tensioning block; 11, working surface; 12, boss; 13, inclined surface; 15, threaded hole.

[0038] 2, elastic pad; 21, first part; 22, second part; 23, third part; 24, groove; 25, connecting hole.

[0039] 3. Tension cylinder;

[0040] 4. Push rod;

[0041] 5. Connecting plate;

[0042] 6. Connecting rod;

[0043] 7. Tension disk;

[0044] 8. Ejector rod;

[0045] 91. Bolt; 92. First gasket; 93. Second gasket;

[0046] X. First direction; Y. Second direction. Detailed implementation manner

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present disclosure and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0048] For technologies, methods and devices known to those of ordinary skill in the relevant fields, details may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0049] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present disclosure and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0050] In the description of the present disclosure, it should be understood that using words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, these words have no special meanings, and therefore should not be construed as limiting the scope of protection of the present disclosure.

[0051] In addition, the technical features involved in different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0052] In the pipeline construction of industries such as petroleum and chemical engineering, it is often necessary to use the single-sided welding with double-sided forming or the internal welding machine root welding process to weld between pipelines. And before welding, it is usually necessary to machine a bevel on the pipeline.

[0053] A beveling machine is a special equipment for machining the bevel of a pipeline before welding. It belongs to a movable small numerical control machining center and is mainly used for field construction.

[0054] Figure 1 and Figure 2 shows the structure of the beveling machine and its tensioning mechanism in the embodiment of the present disclosure.

[0055] For the convenience of understanding, first, in combination with Figure 1 , the basic structure of the beveling machine will be described.

[0056] Referring to Figure 1 , the beveling machine 100 generally includes a tensioning mechanism 10, a cutting mechanism 20, and a feeding mechanism 30.

[0057] The cutting mechanism 20 is used to cut the pipeline to form a bevel. It includes a main shaft 201 and a cutting disc 202. The cutting disc 202 is sleeved outside the main shaft 201, and a cutting tool (not marked in the figure) is provided on the cutting disc 202. The cutting mechanism 20 cuts the pipeline through the cutting tool to obtain a bevel. The axial direction, radial direction, and circumferential direction of the main shaft 201 are respectively consistent with the axial direction, radial direction, and axial direction of the pipeline.

[0058] The feeding mechanism 30 is drivingly connected to the cutting mechanism 20 and is used to realize the feeding of the cutting mechanism 20 so that the cutting mechanism 20 reaches a suitable cutting position.

[0059] The tensioning mechanism 10 is located on one axial side of the main shaft 201 and is connected to the end of the main shaft 201 away from the feeding mechanism 30. It is used to tension and position the pipeline to achieve firm contact between the beveling machine 100 and the pipeline, facilitating the cutting mechanism 20 to cut the pipeline.

[0060] When it is necessary to cut a bevel on the pipeline, first place the beveling machine 100 inside the pipeline, then use the tensioning mechanism 10 to tension the pipeline, and use the cutting mechanism 20 to cut to obtain a bevel. It can be seen that the tensioning mechanism 10 is an important part of the beveling machine 100.

[0061] Next, in combination with Figure 1 - Figure 2 , the basic structure of the tensioning mechanism 10 will be described.

[0062] See Figure 1, the tensioning mechanism 10 includes a connecting cylinder 101 and a tensioning assembly 102. The connecting cylinder 101 is connected to one end of the main shaft 201 away from the feeding mechanism 30. It is hollow inside, and its central axis is collinear with the central axis of the main shaft 201. The tensioning assembly 102 is arranged at the axial end of the connecting cylinder 101. As Figure 1 shown, in some embodiments, the tensioning mechanism 10 includes two tensioning assemblies 102, and these two tensioning assemblies 102 are arranged at the axial two ends of the connecting cylinder 101. The tensioning assembly 102 includes a tensioning oil cylinder 3 and a tensioning device 103. The tensioning device 103 includes a push rod 4, a connecting disk 5, a connecting rod 6, a tensioning disk 7 and a radial moving mechanism 104.

[0063] The tensioning oil cylinder 3 is arranged inside the connecting cylinder 101 and is drivingly connected to the tensioning device 103, so as to drive the tensioning device 103 to contact the inner wall of the pipeline when extending, and tension the pipeline. Specifically, the telescopic direction of the tensioning oil cylinder 3 is along the axes of the connecting cylinder 101 and the main shaft 201. Its output end (that is, the end of the piston rod of the tensioning oil cylinder 3, that is, the end of the tensioning oil cylinder 3 located outside the cylinder barrel) is connected to the push rod 4. In this way, when the tensioning oil cylinder 3 telescopes, it can drive the push rod 4 to move axially along the connecting cylinder 101 and the main shaft 201. It can be understood that the movement along the axes of the connecting cylinder 101 and the main shaft 201 is also the movement along the axis of the pipeline, and can also be simply referred to as axial movement subsequently.

[0064] The push rod 4 passes through the connecting disk 5 and the tensioning disk 7 and is fixedly connected to the connecting disk 5, so that when the push rod 4 moves axially, it can drive the connecting disk 5 to move axially. The end of the push rod 4 connected to the tensioning oil cylinder 3 is called the first end of the push rod 4. The other end of the push rod 4 opposite to the first end is called the second end of the push rod 4.

[0065] The connecting disk 5 is arranged on the push rod 4, and its central axis is collinear with the central axes of the connecting cylinder 101 and the main shaft 201. In other words, the axial, radial and circumferential directions of the connecting disk 5 are consistent with the axial, radial and circumferential directions of the connecting cylinder 101, the main shaft 201 and the pipeline.

[0066] The tensioning disc 7 is arranged at the axial end of the connecting cylinder 101, and its central axis is collinear with the central axes of the connecting cylinder 101 and the main shaft 201. In other words, the axial, radial, and circumferential directions of the connecting disc 5 are consistent with those of the connecting cylinder 101, the main shaft 201, and the pipeline. The tensioning disc 7 is provided with a plurality of openings arranged at intervals in the circumferential direction. A radial movement mechanism 104 is arranged in each opening. The radial movement mechanism 104 can move radially along the tensioning disc 7 (that is, it can move radially along the pipeline, which can be simply referred to as radial movement), and includes a push rod 8 and a tensioning block 1. The push rod 8 extends radially along the tensioning disc 7, so that the push rod 8 can move radially along the tensioning disc 7. A tensioning block 1 is arranged at the first end of each push rod 8, so that the push rod 8 can drive the tensioning block 1 to move radially together. The tensioning block 1 is a component of the tensioning mechanism 10 for contacting the inner wall of the pipeline. Or rather, the tensioning mechanism 10 contacts the inner wall of the pipeline through the tensioning block 1. The second end of each push rod 8 is hinged to a connecting rod 6. At the same time, the other end of each connecting rod 6 is hinged to the connecting disc 5, so that the first end and the second end of the connecting rod 6 are respectively hinged to the connecting disc 5 and the radial movement mechanism 104. At this time, when the connecting disc 5 moves axially, the connecting rod 6 can drive the radial movement mechanism 104 to move radially, realizing the radial movement of the push rod 8 and the tensioning block 1, so that the tensioning block 1 can move towards the inner wall of the pipeline until it abuts against the inner wall of the pipeline, completing the tensioning of the pipeline.

[0067] Based on the above settings, when the tensioning oil cylinder 3 expands and contracts, it can push and pull the push rod 4, drive the connecting disc 5 to move axially, make the connecting rod 6 swing, push the push rod 8 to move radially, drive the tensioning block 1 to move radially, and make the tensioning block 1 extend or retract radially, contacting or not contacting the inner wall of the pipeline. Among them, when the tensioning oil cylinder 3 extends, the tensioning block 1 extends radially, and the tensioning block 1 can contact the inner wall of the pipeline to tension the pipeline, realizing the firm contact between the bevelling machine 100 and the pipeline for stable cutting.

[0068] In the above process, the push rod 4, the connecting disc 5, the connecting rod 6, the tensioning disc 7, and the push rod 8 can convert the expansion and contraction movement of the tensioning oil cylinder 3 into the radial movement of the tensioning block 1, realizing the conversion of a smaller axial force into a larger radial force.

[0069] When the tensioning oil cylinder 3 extends in place, the tensioning is completed. At this time, the sum of the pressures exerted on the inner wall of the pipeline by all the radial movement mechanisms 104 (specifically, the tensioning blocks 1) of the tensioning device 103 is the tensioning force T exerted by the tensioning assembly 102 on the inner wall of the pipeline. 1 The tensioning force T 1 If it is too large, it is easy to cause damage to the pipeline. In particular, some pipelines (such as oil and gas pipelines) are provided with an anti-corrosion layer on the inner wall. When the tensioning force T 1 is too large, it is easy to damage the anti-corrosion layer, causing anti-corrosion failure, affecting the service life and normal use of the pipeline, and even possibly triggering safety accidents.

[0070] In the related art, the beveling machine does not have a tension monitoring function, the controllability of the tension is poor, and it cannot be quantitatively displayed. Therefore, over-tension often occurs during the tensioning process, resulting in damage to the pipeline due to excessive tension.

[0071] In view of the above situation, the embodiments of the present disclosure analyze the working principle of the tensioning assembly 102, and improve the structure of the beveling machine 100 based on the analysis results, so that the beveling machine 100 has a tension monitoring function to reduce the risk of pipeline damage caused by excessive tension.

[0072] First, based on the tensioning principle of the tensioning assembly 102, a mechanical model as shown in Figure 7 and Figure 8 is established without considering friction, self-weight and other conditions.

[0073] According to the working principle of the tensioning assembly 102, during the tensioning process, the first end of the connecting rod 6 moves axially along with the output end of the tensioning cylinder 3, and the second end of the connecting rod 6 moves radially along with the radial moving mechanism 104. The length of the connecting rod 6 remains unchanged and is always A. Accordingly, a right triangle mechanical model as shown in Figure 7 and Figure 8 is abstracted, where Figure 7 is the mechanical model diagram of the tensioning assembly at the beginning of tensioning, Figure 8 is the mechanical model diagram of the tensioning assembly at the end of tensioning. It can be understood that at the beginning of tensioning, the tensioning cylinder 3 has not extended, the tensioning block 1 has not contacted the inner wall of the pipeline, and the thrust F 0 applied by the tensioning cylinder 3 and the pressure T 0 (i.e., the tensioning force applied by the tensioning assembly 102) applied by the tensioning device 103 to the pipeline can both be regarded as 0; at the end of tensioning, the tensioning cylinder 3 extends in place, the tensioning block 1 contacts the inner wall of the pipeline, and the thrust applied by the tensioning cylinder 3 and the pressure applied by the tensioning device 103 to the pipeline are respectively denoted as F 1 and T 1 .

[0074] In Figure 7 and Figure 8 , from the perspective of structural dimensions, the hypotenuse of the right triangle corresponds to the length A of the connecting rod 6, and the axial right side of the right triangle corresponds to the axial distance between the first end of the connecting rod 6 and the radial moving mechanism 104 (which is also the axial distance between the first end and the second end of the connecting rod 6). This distance is denoted as L 0 and L 1 at the beginning and end of tensioning respectively. The angles between the hypotenuse and the axial right side of the right triangle are denoted as α 0 and α 1 at the beginning and end of tensioning respectively. Among them, asFigure 8 As shown, if the extended displacement of the tensioning cylinder 3 from the start of tensioning to the completion of tensioning is denoted as b, then L 1 = L 0 - b.

[0075] Meanwhile, from the perspective of force, in Figure 8 , the axial right-angled side of the right-angled triangle corresponds to the force exerted on the first end of a single connecting rod 6 at the completion of tensioning, and this force is the thrust F 1 exerted by which is The radial right-angled side of the right-angled triangle corresponds to the pressure exerted on the pipeline by a single radial moving mechanism 104 at the completion of tensioning, which is the tensioning force T 1 exerted by which is where N is the number of radial moving mechanisms 104 in the tensioning device 103.

[0076] Therefore, according to Figure 8 the geometric relationship,

[0077] Thus, the tensioning force T 1 exerted by the tensioning assembly 102 has the following calculation formula:

[0078]

[0079] where A is the length of the connecting rod 6; L 0 is the distance between the first end of the connecting rod 6 and the radial moving mechanism 104 in the telescopic direction of the tensioning cylinder 3 at the start of tensioning; b is the extended displacement of the tensioning cylinder 3 from the start of tensioning to the completion of tensioning; F 1 is the thrust exerted by the tensioning cylinder 3 at the completion of tensioning.

[0080] Since in the above formula (1), both A and L 0 are structural parameters and can be determined in advance, therefore, when calculating the tensioning force T 1 based on the above formula (1), only the magnitudes of b and F 1 these two variables need to be determined.

[0081] According to the above analysis results, referring to Figure 1 and Figure 9 , in the embodiment of the present disclosure, a monitoring device 40 is provided in the beveling machine 100. The monitoring device 40 is coupled to the tensioning cylinder 3 and is used to detect the extended displacement b and the exerted thrust F 1 of the tensioning cylinder 3, and determine the tensioning force T 1 exerted by the tensioning assembly 102 on the inner wall of the pipeline according to the detected extended displacement b and thrust F 1 .

[0082] Since the provided monitoring device 40 has the functions of detecting the extension displacement of the tensioning cylinder and the thrust of the tensioning cylinder, the extension displacement b of the tensioning cylinder 3 and the applied thrust F can be detected. 1 , therefore, substituting the measured extension displacement b and thrust F 1 into the above formula (1), the tensioning force T can be obtained. 1 , realizing the determination of the tensioning force T. 1

[0083] It can be seen that based on the provided monitoring device 40, the beveling machine 100 has the function of monitoring the tensioning force. In this way, it is convenient to prevent the tensioning force T 1 from being too large, so as to reduce the risk of damage to the pipeline and its anti-corrosion layer due to excessive tensioning force.

[0084] Among them, in order to enable the monitoring device 40 to have the function of detecting the extension displacement of the tensioning oil rod, refer to Figure 1 , in some embodiments, the monitoring device 40 includes a displacement sensor 402, and this displacement sensor 402 is used to detect the extension displacement b. As an example, refer to Figure 1 - 2 and Figure 9 , in some embodiments, the displacement sensor 402 is a wire-pulling displacement sensor 405, and the wire of the wire-pulling displacement sensor 405 is connected to the tensioning cylinder 3. Specifically, as Figure 1 shown, the wire of the wire-pulling displacement sensor 405 is connected to the second end of the push rod 4. More specifically, as Figure 1 shown, the monitoring device 40 includes a guide rod 401, and the wire of the wire-pulling displacement sensor 405 is connected to the second end of the push rod 4 through the guide rod 401.

[0085] Based on the provided displacement sensor 402, the extension displacement b of the tensioning cylinder 3 can be conveniently detected, realizing the function of detecting the extension displacement of the tensioning oil rod of the monitoring device 40. In particular, when the displacement sensor 402 is a wire-pulling displacement sensor 405, since the wire-pulling displacement sensor 405 (also known as a cable displacement sensor) is a linear displacement sensor with a compact structure, a large measurement range and high precision, it is more convenient to accurately detect the extension displacement b of the tensioning cylinder 3 and is more suitable for installation on the beveling machine 100.

[0086] Furthermore, a guide rod 401 is further provided to realize the coupling between the wire-pulling displacement sensor 405 and the tensioning oil cylinder 3. The advantage is that it is convenient to install the wire-pulling displacement sensor 405 outside the main shaft 201, which facilitates the disassembly, assembly and maintenance of the wire-pulling displacement sensor 405. Among them, in the case where the guide rod 401 is not provided, affected by the length of the wire, the displacement sensor 402 using the wire-pulling displacement sensor 405 needs to be arranged inside the main shaft 201 so that its wire can be connected to the second end of the push rod 4. In this case, due to the influence of the main shaft 201 and other structures outside the main shaft 201, the subsequent disassembly, assembly and maintenance of the wire-pulling displacement sensor 405 are all inconvenient. And as Figure 1 shown, in the case where the guide rod 401 is provided, the guide rod 401 can be arranged inside the main shaft 201, with one end connected to the second end of the push rod 4 and the other end extending to near the end of the main shaft 201 away from the tensioning oil cylinder 3. At this time, the displacement sensor 402 using the wire-pulling displacement sensor 405 is no longer limited to being arranged inside the main shaft 201, but can be arranged outside the main shaft 201. Since the space outside the main shaft 201 is relatively spacious, therefore, the subsequent disassembly, assembly and maintenance of the wire-pulling displacement sensor 405 are all more convenient. At the same time, the guide rod 401 can guide the extending direction of the wire during the tensioning process, improve the coaxiality of the wire and the tensioning oil cylinder 3, and enhance the detection accuracy.

[0087] In addition, in order to enable the monitoring device 40 to have the function of detecting the thrust of the tensioning oil cylinder, referring to Figure 9 , in some embodiments, the monitoring device 40 includes an oil pressure sensor 403, and the oil pressure sensor 403 is used to detect the oil pressure in the tensioning oil cylinder 3. The monitoring device 40 determines the thrust F according to the detection result of the oil pressure sensor 403 1 . In this way, by monitoring the oil pressure of the tensioning oil cylinder 3, it is convenient to realize the detection of the thrust F 1 applied by the tensioning oil cylinder 3, and the function of detecting the thrust of the tensioning oil cylinder of the monitoring device 40 is realized.

[0088] In the foregoing embodiments, referring to Figure 9 , the process of determining the thrust F 1 based on the measured oil pressure, and the process of determining the tensioning force T 1 based on the measured extended displacement b and the thrust F 1 can both be carried out by the controller 404 of the beveling machine 100. During operation, the displacement sensor 402 and the oil pressure sensor 403 transmit the detection results to the controller 404, and the controller 404 then calculates the tensioning force T 1 according to the relationship between the oil pressure and the thrust F 1 and the foregoing formula (1), and realizes the determination of the tensioning force T 1 .

[0089] The controller 404 may include a memory and a processor coupled to the memory, and the processor is configured to execute the fan speed regulation method of the embodiments based on instructions stored in the memory.

[0090] Among them, the memory may be a high-speed RAM memory or a non-volatile memory, etc. The memory may also be a memory array. The memory may also be partitioned, and the blocks may be combined into virtual volumes according to certain rules. The processor may be a central processing unit CPU, or an application specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the control method of the vehicle of the embodiments.

[0091] In addition, in the foregoing embodiments, in order to facilitate the staff to timely understand the determined tension force T 1 magnitude and take corresponding measures, refer to Figure 9 , the beveling machine 100 may further include a display 50. The display 50 is signal-connected to the monitoring device 40 and is used to display the tension force T 1 determined by the monitoring device 40. Specifically, as Figure 9 shown, the display 50 realizes the signal connection with the monitoring device 40 by being electrically connected to the controller 404, so that when the controller 404 calculates the tension force T 1 , the calculation result can be transmitted to the display 50 and displayed by the display 50.

[0092] Since the display 50 can realize the intuitive display of the tension force magnitude, it is convenient for the staff to observe and operate. The staff can timely understand whether the tension force is too large and take measures in time when the tension force is too large. Therefore, it can more effectively prevent the pipeline from being damaged due to excessive tension force.

[0093] It can be seen that based on the foregoing embodiments, the beveling machine 100 of the present disclosure has a tension force monitoring function, has the characteristics of strong controllability of the tension force and digital display, is beneficial to preventing the tension force from being too large, and reduces the risk of the pipeline being damaged due to excessive tension force applied by the beveling machine 100, especially can reduce the damage to the anti-corrosion layer on the inner wall of the pipeline caused by excessive tension force.

[0094] In addition, the pipeline and its anti-corrosion layer may be damaged not only due to excessive tension force, but also due to being knocked by the tension block 1.

[0095] In the related art, the tension block 1 generally directly contacts the inner wall of the pipeline. Since the tension block 1 is generally a steel structure part with a relatively high hardness, and the tension force is usually relatively large, therefore, the tension block 1 directly contacting the inner wall of the pipeline is likely to knock the inner wall of the pipeline, causing damage to the pipeline and its anti-corrosion layer.

[0096] In view of the above situation, the embodiment of the present disclosure further improves the structure of the tensioning device 103 to reduce the risk of damage to the pipeline caused by collision of the tensioning block 1.

[0097] Figure 1 - 6 The structure of the beveling machine 100 of the present disclosure is exemplarily shown.

[0098] See also Figure 1 - 6 In some embodiments of the present disclosure, the tensioning device 103 includes not only the tensioning block 1, but also an elastic pad 2 (e.g., a rubber pad). In this case, the radial moving mechanism 104 includes not only the push rod 8 and the tensioning block 1, but also the elastic pad 2. The elastic pad 2 is disposed on the working surface 11 of the tensioning block 1, so that the tensioning block 1 contacts the inner wall of the pipe through the elastic pad 2. The working surface 11 of the tensioning block 1 is the surface of the tensioning block 1 facing the inner wall of the pipe. It can be understood that the working surface 11 is also the surface of the tensioning block 1 that is away from the center of the tensioning assembly (i.e., the center of the tensioning disk 7), and is also the surface of the tensioning block 1 located on the outside along the radial direction of the pipe.

[0099] By arranging the elastic pad 2 on the tension block 1, the tension block 1 is no longer in direct contact with the inner wall of the pipe, but can contact the inner wall of the pipe through the elastic pad 2. Since the elastic pad 2 is different from the tension block 1, the hardness is relatively small, and it is elastic and deformable. Therefore, it can reduce the collision with the inner wall of the pipe, and reduce the risk of damage to the inner wall of the pipe due to the collision of the tension block 1. In this way, the damage to the inner wall of the pipe by the groove machine 100 can be reduced, and in particular, the damage to the anti-corrosion layer on the inner wall of the pipe by the tensioning mechanism 10 can be reduced.

[0100] In order to further reduce the damage to the inner wall of the pipe, refer to Figure 3 - 5 In some embodiments, a boss 12 is provided on the working surface 11, and the elastic pad 2 covers the boss 12. Figure 4 As shown, the boss 12 protrudes outward from the working surface 11 (i.e., the side away from the center of the tension disk 7), and extends along the first direction X, extending from one end of the working surface 11 to the other end of the working surface 11. The first direction X is the direction along the axial direction of the pipeline, that is, the first direction X is along the axial direction of the pipeline, that is, along the axial direction of the tension disk 7.

[0101] Based on the above arrangement, when the pipeline is tightened, the surface of the elastic pad 2 facing the inner wall of the pipeline is no longer in contact with the inner wall of the pipeline as a whole, but only the part covered on the boss 12 and supported by the boss 12 is in contact with the pipeline. Since the contact area between the elastic pad 2 and the inner wall of the pipeline is reduced, it is more conducive to reducing the impact damage to the inner wall of the pipeline and the anti-corrosion layer on the inner wall.

[0102] The shape of the boss 12 is not limited.Figure 4 As shown, the surface of the boss 12 is arc-shaped. In this case, the part of the elastic pad 2 covering the boss 12 can also be arc-shaped, which conforms to the arc shape of the inner wall of the pipeline, facilitating close contact with the inner wall of the pipeline and achieving a better tightening effect.

[0103] Meanwhile, the number of bosses 12 is not limited and can be one, two or more. When the number of bosses 12 is at least two, the elastic pad 2 can contact the inner wall of the pipeline at each boss 12, increasing the number of contact points and facilitating a more stable tightening effect. For example, referring to Figure 3 and Figure 4 , in some embodiments, there are two bosses 12 provided on the working surface 11, and these two bosses 12 are arranged at intervals along the second direction Y. Among them, the second direction Y is parallel to the working surface 11 and perpendicular to the axial direction of the pipeline, that is to say, the second direction Y is parallel to the working surface 11 and perpendicular to the first direction X. At this time, during the tightening process, the elastic pad 2 can contact the inner wall of the pipeline at both bosses 12, and the tightening effect is more stable and reliable.

[0104] In addition, referring to Figure 4 , in some embodiments, at least one end of the boss 12 along the first direction X is provided with an inclined surface 13, and the top of the inclined surface 13 gradually inclines towards the other end of the boss 12 relative to the bottom end. For example, as Figure 4 shown, in some embodiments, both ends of the boss 12 along the first direction X are provided with inclined surfaces 13, and both of these inclined surfaces 13 incline towards the middle of the boss 12 along the first direction X.

[0105] The advantage of setting the inclined surface 13 is that it can prevent the boss 12 from bumping against the inner wall of the pipeline during the process of the tightening mechanism 10 entering and exiting the pipeline.

[0106] In the above embodiments, in order to enable the elastic pad 2 to better cover the boss 12, referring to Figure 3 and Figure 5 , grooves 24 can be provided on the elastic pad 2. The grooves 24 correspond to the bosses 12 one by one. The bosses 12 are embedded in the grooves 24. When the surface of the boss 12 is arc-shaped, the inner wall of the groove 24 is also arc-shaped. When the number of bosses 12 is two, the number of grooves 24 is also two.

[0107] Based on the provided grooves 24, the elastic pad 2 can be more tightly wrapped around the boss 12, and it is also more convenient for the elastic pad 2 to contact the inner wall of the pipeline, achieving a better tightening effect.

[0108] As a structural form of the elastic pad 2 in the foregoing embodiments, referring to Figure 3 and Figure 5, the elastic pad 2 includes a first portion 21, and the first portion 21 covers the working surface 11. In an embodiment where the groove 24 is provided on the elastic pad 2, the groove 24 is provided on the first portion 21.

[0109] And, continuing to refer to Figure 3 and Figure 5 , in some embodiments, the elastic pad 2 not only includes the first portion 21, but also includes a second portion 22 and a third portion 23. The second portion 22 and the third portion 23 are connected to opposite ends of the first portion 21 along the second direction Y, and are both bent from the first portion 21 in a direction opposite to the protruding direction of the boss 12, that is, both are bent from the first portion 21 in a direction close to the center of the tensioning disc 7. At this time, the elastic pad 2 can not only cover the working surface 11 of the tensioning block 1 through the first portion 21, but also cover the surfaces (which can also be simply referred to as side surfaces) of the tensioning block 1 on both sides of the working surface 11 through the second portion 22 and the third portion 23, which is convenient for realizing the connection between the elastic pad 2 and the tensioning block 1.

[0110] For example, referring to Figure 3 - 5 , in some embodiments, the second portion 22 and the third portion 23 are connected to the tensioning block 1 through threaded connectors. Specifically, as Figure 3 - 5 shown, in some embodiments, threaded holes 15 are provided on both surfaces of the tensioning block 1 on both sides of the working surface 11. Two threaded holes 15 are arranged at intervals along the first direction X on each side surface of the tensioning block 1. Correspondingly, connection holes 25 are provided on both the second portion 22 and the third portion 23, and the connection holes 25 correspond to the threaded holes 15 one by one. Threaded connectors such as bolts 91 pass through the connection holes 25 and the threaded holes 15 to connect the second portion 22 and the third portion 23 to the two side surfaces of the tensioning block 1 respectively. More specifically, a gasket is provided between the bolt 91 and the side surface of the tensioning block 1. For example, as Figure 3 shown, in some embodiments, two gaskets are provided between the bolt 91 and the side surface of the tensioning block 1, namely a first gasket 92 and a second gasket 93, so that a more firm connection between the elastic pad 2 and the tensioning block 1 can be realized.

[0111] Based on the above settings, the elastic pad 2 and the tensioning block 1 are detachably connected, which is convenient for replacing the elastic pad 2 when needed, for example, when the elastic pad 2 is worn or damaged.

[0112] And, in the above settings, the elastic pad 2 and the tensioning block 1 are not directly connected at the working surface 11, but are connected on both sides of the working surface 11 along the second direction Y. Since the space on both sides of the working surface 11 is relatively large compared with the space above the working surface 11, it is more convenient to perform the connection operation on the elastic pad 2 and the tensioning block 1.

[0113] Meanwhile, threaded connectors are used to achieve the detachable connection between the elastic pad 2 and the tensioning block 1. The structure is relatively simple, the cost is relatively low, the operation is relatively simple, and the elastic pad 2 can be firmly installed on the tensioning block 1, effectively reducing the risk of the elastic pad 2 falling off.

[0114] The foregoing are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A beveling machine (100), characterized in that, it comprises: A tensioning assembly (102), including a tensioning oil cylinder (3) and a tensioning device (103), the tensioning oil cylinder (3) is drivingly connected to the tensioning device (103), so that when extending out, it drives the tensioning device (103) to contact the inner wall of the pipeline to tension the pipeline. The tensioning device (103) includes a connection disk (5), a connecting rod (6) and a radial moving mechanism (104). The tensioning oil cylinder (3) is drivingly connected to the connection disk (5) to drive the connection disk (5) to move axially. The first end and the second end of the connecting rod (6) are respectively hinged to the connection disk (5) and the radial moving mechanism (104), so that when the connection disk (5) moves axially, it drives the radial moving mechanism (104) to move radially; and The monitoring device (40), which is coupled to the tensioning cylinder (3), is configured to detect the extension displacement of the tensioning cylinder (3). and the applied thrust , and based on the detected extension displacement and the thrust , determine the tensioning force exerted by the tensioning assembly (102) on the inner wall of the pipeline according to the following formula : Among them, is the length of the connecting rod (6), is the distance between the first end of the connecting rod (6) at the start of tensioning and the radial movement mechanism (104) in the telescopic direction of the tensioning cylinder (3).

2. The beveling machine (100) according to claim 1, characterized in that, the monitoring device (40) includes: An oil pressure sensor (403) is used to detect the oil pressure in the tensioning cylinder (3), and the monitoring device (40) determines the thrust according to the detection result of the oil pressure sensor (403). and / or A displacement sensor (402) for detecting the extending displacement .

3. The beveling machine (100) according to claim 2, characterized in that, the displacement sensor (402) is a wire-pulling displacement sensor (405), and the wire of the wire-pulling displacement sensor (405) is connected to the tensioning oil cylinder (3).

4. The beveling machine (100) according to claim 3, characterized in that, the tensioning device (103) includes a push rod (4), the first end of the push rod (4) is connected to the tensioning oil cylinder (3), and the wire of the wire-pulling displacement sensor (405) is connected to the second end of the push rod (4).

5. The beveling machine (100) according to claim 4, characterized in that, the monitoring device (40) includes a guide rod (401), and the wire of the wire-pulling displacement sensor (405) is connected to the second end of the push rod (4) through the guide rod (401).

6. The beveling machine (100) according to any one of claims 1-5, characterized in that, The grooving machine (100) includes a display (50) which is signal-connected to the monitoring device (40) and is used for displaying the tension force determined by the monitoring device (40). .

7. The beveling machine (100) according to any one of claims 1-5, characterized in that, the tensioning device (103) includes: A tensioning block (1), having a working surface (11), and the working surface (11) is the surface of the tensioning block (1) facing the inner wall of the pipeline; and An elastic pad (2), arranged on the working surface (11) of the tensioning block (1), so that the tensioning block (1) contacts the inner wall of the pipeline through the elastic pad (2).

8. The beveling machine (100) according to claim 7, characterized in that, a boss (12) is provided on the working surface (11), and a groove (24) is provided on the elastic pad (2), and the boss (12) is embedded in the groove (24).

9. The beveling machine (100) according to claim 8, characterized in that, The elastic pad (2) includes a first part (21), a second part (22) and a third part (23). The first part (21) covers the working surface (11). The second part (22) and the third part (23) are connected to opposite ends of the first part (21), and are both bent by the first part (21) in a direction opposite to the protruding direction of the boss (12). The elastic pad (2) is detachably connected to the tensioning block (1) through the second part (22) and the third part (23).

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