Gas-liquid pressurization tensioning device and using method thereof

Abstract

The invention discloses a gas-liquid pressurization tensioning device and a using method thereof. The device is used for roundness correction of the pipe orifice of the pipeline and comprises a pneumatic control unit, a gas-liquid pressurization unit, a hydraulic control unit and a tensioning unit. The pneumatic control unit comprises a gas control valve and a controller; the gas-liquid pressurizing unit comprises a gas pump assembly and an oil tank which are connected, and the gas pump assembly is connected with a gas control valve; the hydraulic control unit comprises a first pressure sensor, a first energy accumulator and a second energy accumulator; the first energy accumulator is connected with the air pump assembly, and the second energy accumulator is connected with the air pump assembly. When the gas control valve is opened, the gas pump assembly acts to pump hydraulic oil in the oil tank into the first energy accumulator and the second energy accumulator; the controller can control the gas control valve to be opened and closed according to a monitoring result of the first pressure sensor; the tensioning unit comprises a first tensioning assembly and a second tensioning assembly which are symmetrically arranged; according to the device, the tensioning force can be greatly increased, the ovality deviation of the pipe orifice of the steel pipe is effectively reduced, and accurate assembly of the pipe orifice is completed.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding construction, and in particular to a gas-liquid pressurizing and tightening device and a use method thereof. Background Art

[0002] At present, long-distance pipeline construction has been using automatic pipeline welding equipment for welding operations on a large scale. Among them, the pipeline internal welding machine (or pipeline internal jointing device) used for rapid pipe joint assembly is a key equipment to ensure the quality and efficiency of pipeline welding flow operations. However, due to factors such as processing, hoisting, and transportation extrusion, the ovality deviation of the steel pipe ends at the construction site is large, making it difficult to assemble the pipeline, and the joints have a large amount of misalignment, which in turn reduces the quality of pipe joint assembly and affects the quality of pipeline welding construction.

[0003] Existing pipeline internal welding machines (or pipeline internal jointing devices) generally use pneumatic tensioning devices to align the pipe opening. Summary of the invention

[0004] In order to enrich the product categories of tensioning devices, increase the selection space of tensioning and rounding methods, and improve the efficiency of pipe orifice rounding, the present invention proposes a gas-liquid boosting tensioning device and a method of using the same.

[0005] In a first aspect, an embodiment of the present invention provides a gas-liquid pressurizing and tightening device for rounding a pipe orifice, comprising a pneumatic control unit, a gas-liquid pressurizing unit, a hydraulic control unit and a tightening unit;

[0006] The pneumatic control unit comprises a gas processing assembly, a gas control valve and a controller connected in sequence;

[0007] The gas processing component is connected to a gas source;

[0008] The gas-liquid booster unit comprises an air pump assembly and an oil tank connected thereto, wherein the air pump assembly is connected to the gas control valve;

[0009] The hydraulic control unit comprises a first pressure sensor, a first accumulator and a second accumulator; the first accumulator is connected to the air pump assembly, and the second accumulator is connected to the air pump assembly; the first pressure sensor is arranged in a hydraulic pipeline between the air pump assembly and the first accumulator and the second accumulator;

[0010] When the gas control valve is in an open state, the air pump assembly operates to pump the hydraulic oil in the oil tank into the first accumulator and the second accumulator; and the first pressure sensor is connected to the controller, and the controller can control the switch of the gas control valve according to the monitoring result of the first pressure sensor;

[0011] The tensioning unit includes a first tensioning component and a second tensioning component which are symmetrically arranged; the first tensioning component is connected to the first accumulator, and the hydraulic oil in the first accumulator can be injected into the first tensioning component to drive the first tensioning component to operate; the second tensioning component is connected to the second accumulator, and the hydraulic oil in the second accumulator can be injected into the second tensioning component to drive the second tensioning component to operate.

[0012] In one or some optional embodiments, the hydraulic control unit further comprises a first solenoid valve and a second solenoid valve;

[0013] The first solenoid valve is connected to the first accumulator and the first tensioner assembly, respectively, and is used to control the flow direction and flow rate of the hydraulic oil between the first accumulator and the first tensioner assembly;

[0014] The second solenoid valve is connected to the second accumulator and the second tensioning assembly respectively, and is used to control the flow direction and flow rate of the hydraulic oil between the second accumulator and the second tensioning assembly.

[0015] In one or some optional embodiments, the hydraulic control unit further includes a second pressure sensor and a third pressure sensor;

[0016] The second pressure sensor is arranged in the hydraulic pipeline between the first accumulator and the first solenoid valve;

[0017] The third pressure sensor is disposed in the hydraulic pipeline between the second accumulator and the second solenoid valve.

[0018] In one or some optional embodiments, the hydraulic control unit further comprises a hydraulic integrated block;

[0019] The hydraulic integrated block is respectively connected to the first pressure sensor, the second pressure sensor, the third pressure sensor, the first solenoid valve, the second solenoid valve, the first accumulator and the second accumulator, and is used for integrating hydraulic pipelines.

[0020] In one or some optional embodiments, the first tensioning assembly includes a first oil cylinder and a first tensioning mechanism connected;

[0021] The first oil cylinder is connected to the first solenoid valve;

[0022] The first tensioning mechanism can extend into the pipeline and can press against the inner wall of the pipeline in the circumferential direction under the pressure of the first oil cylinder.

[0023] In one or some optional embodiments, the first oil cylinder and the first tensioning mechanism are connected and fixed by a first fastener.

[0024] In one or some optional embodiments, the second tensioning assembly includes a second oil cylinder and a second tensioning mechanism connected;

[0025] The second oil cylinder is connected to the second solenoid valve;

[0026] The second tensioning mechanism can extend into the pipeline and can press against the inner wall of the pipeline in the circumferential direction under the pressure of the second oil cylinder.

[0027] In one or some optional embodiments, the second oil cylinder and the second tensioning mechanism are connected and fixed by a second fastener.

[0028] In one or some optional embodiments, the air pump assembly includes an air motor, a coupling and a pump head connected in sequence;

[0029] The pneumatic motor is connected to the gas control valve;

[0030] The pump head is connected to the first accumulator and the second accumulator respectively;

[0031] The oil inlet of the pump head is inserted into the oil tank.

[0032] In one or some optional embodiments, the gas processing assembly includes a filter, a pressure regulating valve and a pressure gauge;

[0033] The filter is connected to the pressure regulating valve;

[0034] The filter is connected to the gas source;

[0035] The pressure regulating valve is connected to the gas control valve, and the pressure gauge is arranged in the hydraulic pipeline between the pressure regulating valve and the gas control valve.

[0036] In a second aspect, an embodiment of the present invention provides a method for using the gas-liquid pressurizing and tensioning device according to the first aspect, characterized in that it includes:

[0037] Regulating the pressure of the compressed air to a first preset pressure value through the gas processing component, opening the gas control valve, and passing the regulated compressed air into the air pump component to drive the air pump component to pump the hydraulic oil in the oil tank into the first accumulator and the second accumulator;

[0038] monitoring the pressure in the first accumulator and the second accumulator through a first pressure sensor, and transmitting the monitoring data to a controller;

[0039] When the first pressure sensor monitors that the pressure in the first accumulator and the second accumulator reaches a second preset pressure value, the controller controls the gas control valve to close;

[0040] Injecting the hydraulic oil in the first accumulator into the first tensioning assembly, and injecting the hydraulic oil in the second accumulator into the second tensioning assembly, so that the first tensioning assembly and the second tensioning assembly are in motion;

[0041] When the first pressure sensor monitors that the pressure in the first accumulator and the second accumulator is lower than a preset pressure threshold, the controller controls the gas control valve to open and continues to charge the first accumulator and the second accumulator to a second preset pressure value.

[0042] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0043] The gas-liquid boosting and tightening device provided in the embodiment of the present invention combines the air pressure pipeline and the hydraulic pipeline to realize the synchronous coordination of gas boosting and pressure regulation and hydraulic oil substantial boosting, so that lower air pressure can be converted into higher hydraulic pressure, thereby greatly increasing the tightening force, and can effectively reduce the ovality deviation of the steel pipe mouth when calibrating the pipe mouth, thereby completing the precise assembly of the pipe mouth; and, the pressure monitoring result of the first pressure sensor can be fed back to the controller in real time, so that the gas control valve can be adjusted in real time according to the pressure of the hydraulic pipeline, to ensure that the tightening force of the tightening component is always kept in a sufficiently large state, thereby improving the operating efficiency and the pipe mouth assembly effect, ensuring the welding quality and construction progress, and having a high engineering promotion and application value.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0045] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 It is a schematic diagram of the principle of the gas-liquid pressurizing and tightening device provided in an embodiment of the present invention;

[0048] Figure 2 It is a schematic structural diagram of a first tensioning assembly provided in an embodiment of the present invention.

[0049] In the figure:

[0050] 1. Pneumatic control unit; 11. Gas processing assembly; 111. Filter; 112. Pressure regulating valve; 113. Pressure gauge; 12. Gas control valve; 13. Controller;

[0051] 2. Gas-liquid booster unit; 21. Air pump assembly; 211. Air motor; 212. Coupling; 213. Pump head; 22. Oil tank;

[0052] 3. Hydraulic control unit; 31. First pressure sensor; 32. First accumulator; 33. Second accumulator; 34. First solenoid valve; 35. Second solenoid valve; 36. Second pressure sensor; 37. Third pressure sensor; 38. Hydraulic integrated block;

[0053] 4. Tensioning unit; 41. First tensioning assembly; 411. First oil cylinder; 4111. First piston; 412. First tensioning mechanism; 4121. First push plate; 4122. First connecting rod; 4123. First push rod; 4124. First tensioning shoe; 4125. First tensioning plate; 41251. First guide hole; 42. Second tensioning assembly; 421. Second oil cylinder; 4211. Second piston; 422. Second tensioning mechanism;

[0054] 5. Gas source. DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0056] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The inventors have found that conventional pipe internal welding machines (or pipe internal aligners) generally use pneumatic tensioning devices to align pipe ends and align them, and the pneumatic pressure is generally less than 1.2 MPa, which cannot provide greater thrust to ensure the aligning quality.

[0059] Based on this, the present invention proposes a gas-liquid pressurizing and tensioning device and a method of using the same, which will be described in detail below through specific embodiments.

[0060] Embodiment 1

[0061] The embodiment of the present invention provides a gas-liquid pressurizing and tightening device for rounding the pipe opening of a pipe. Figure 1 As shown, it includes a pneumatic control unit 1, a gas-liquid booster unit 2, a hydraulic control unit 3 and a tensioning unit 4;

[0062] The pneumatic control unit 1 comprises a gas processing assembly 11, a gas control valve 12 and a controller 13 which are connected in sequence;

[0063] The gas processing assembly 11 is connected to the gas source 5;

[0064] The gas-liquid booster unit 2 includes an air pump assembly 21 and an oil tank 22 connected thereto, and the air pump assembly 21 is connected to the gas control valve 12;

[0065] The hydraulic control unit 3 includes a first pressure sensor 31, a first accumulator 32 and a second accumulator 33; the first accumulator 32 is connected to the air pump assembly 21, and the second accumulator 33 is connected to the air pump assembly 21; the first pressure sensor 31 is arranged in the hydraulic pipeline between the air pump assembly 21 and the first accumulator 32 and the second accumulator 33;

[0066] When the gas control valve 12 is in the open state, the air pump assembly 21 is activated to pump the hydraulic oil in the oil tank 22 into the first accumulator 32 and the second accumulator 33; and the first pressure sensor 31 is connected to the controller 13, and the controller 13 can control the switch of the gas control valve 12 according to the monitoring result of the first pressure sensor 31;

[0067] The tensioning unit 4 includes a first tensioning assembly 41 and a second tensioning assembly 42 which are symmetrically arranged; the first tensioning assembly 41 is connected to the first accumulator 32, and the hydraulic oil in the first accumulator 32 can be injected into the first tensioning assembly 41 to drive the first tensioning assembly 41 to operate; the second tensioning assembly 42 is connected to the second accumulator 33, and the hydraulic oil in the second accumulator 33 can be injected into the second tensioning assembly 42 to drive the second tensioning assembly 42 to operate.

[0068] In the embodiment of the present invention, the gas source 5 can provide compressed air to the pneumatic control unit 1, the gas processing component 11 is used to pre-process the compressed air, and the gas control valve 12 is used to control the on-off of the gas path between the gas processing component 11 and the air pump component 21. When the gas control valve 12 is opened, compressed air is passed into the air pump component 21 to drive the air pump component 21 to operate and pump the oil in the oil tank 22 into the first accumulator 32 and the second accumulator 33; when the gas control valve 12 is closed, the air pump component 21 stops operating, so the gas control valve 12 can control the start and stop of the air pump component 21.

[0069] In a specific embodiment, referring to Figure 1 As shown, the gas processing component 11 may include a filter 111, a pressure regulating valve 112 and a pressure gauge 113 connected in sequence; the filter 111 is used to filter the compressed air to remove impurities in the compressed air; the pressure regulating valve 112 is used to regulate the pressure of the filtered compressed air, and the compressed air passing through the pressure regulating valve 112 can be adjusted to a first preset pressure value; the pressure gauge 113 is used to monitor the pressure of the compressed air after pressure regulation to ensure that the compressed air is at the first preset pressure value.

[0070] In a specific embodiment, referring to Figure 1 As shown, the first tensioning assembly 41 includes a first oil cylinder 411 and a first tensioning mechanism 412. A first piston 4111 is arranged in the first oil cylinder 411, and the first oil cylinder 411 is provided with a first connecting port (not shown in the figure) and a second connecting port (not shown in the figure), and the first piston 4111 is located between the first connecting port and the second connecting port. The first connecting port and the second connecting port are respectively connected to the first accumulator 32 through pipelines, and the hydraulic oil in the first accumulator 32 can be injected into the first oil cylinder 411 to push the first piston 4111 to move. The first tensioning mechanism 412 can extend into the pipeline, and can circumferentially press against the inner wall of the pipeline under the pressure provided by the first oil cylinder 411; specifically, refer to Figure 1 and Figure 2As shown, the first tensioning mechanism 412 may include a first push plate 4121, a plurality of first connecting rods 4122, a plurality of first push rods 4123, a plurality of first tensioning shoes 4124 and a first tensioning plate 4125. The first piston 4111 is fixedly connected to the first push plate 4121, and the end of the first push rod 4123 is fixedly connected to the corresponding first tensioning shoe 4124. The first tensioning plate 4125 is radially provided with a plurality of first guide holes 41251, and the plurality of first guide holes 41251 are evenly distributed circumferentially on the first tensioning plate 4125. A tensioning plate 4125, a first push rod 4123 is inserted into the corresponding first guide hole 41251, and the first connecting rod 4122 is respectively hinged to the first push plate 4121 and the first push rod 4123, so that the first connecting rod 4122 can transmit the thrust of the first push plate 4121 to the first push rod 4123, and the first push rod 4123 can extend out of the first guide hole 41251 under the thrust of the first push plate 4121, so that the first expansion shoe 4124 can be pressed against the inner wall of the pipe to calibrate the pipe mouth.

[0071] In a specific embodiment, referring to Figure 1 As shown, the second tensioning assembly 42 includes a second oil cylinder 421 and a second tensioning mechanism 422. A second piston 4211 is disposed in the second oil cylinder 421, and the second oil cylinder 421 is provided with a third connecting port (not shown in the figure) and a fourth connecting port (not shown in the figure), and the second piston 4211 is located between the third connecting port and the fourth connecting port. The third connecting port and the fourth connecting port are respectively connected to the second accumulator 33 through pipelines, and the hydraulic oil in the second accumulator 33 can be injected into the second oil cylinder 421 to push the second piston 4211 to move. The second tensioning mechanism 422 can extend into the pipeline and can press against the inner wall of the pipeline circumferentially under the pressure provided by the second oil cylinder 421; specifically, the second tensioning mechanism 422 may include a second push plate (not shown in the figure), a plurality of second connecting rods (not shown in the figure), a plurality of second push rods (not shown in the figure), a plurality of second expansion shoes (not shown in the figure) and a second tensioning plate (not shown in the figure), the second piston 4211 is fixedly connected to the second push plate, and the end of the second push rod is fixedly connected to the corresponding second expansion shoe; a plurality of second guide holes (not shown in the figure) are radially arranged inside the second tensioning plate, and the plurality of second guide holes are evenly distributed circumferentially on the second tensioning plate, the second push rod is penetrated through the corresponding second guide holes, the second connecting rod is hinged to the second push plate and the second push rod respectively, so that the second connecting rod can transmit the thrust exerted on the second push plate to the second push rod, and the second push rod can extend out of the second guide hole under the thrust of the second push plate, so that the second expansion shoe presses against the inner wall of the pipeline and calibrates the pipe mouth of the pipeline.

[0072] In the embodiment of the present invention, the first tensioning assembly 41 and the second tensioning assembly 42 are symmetrically arranged, and the structures and specifications of the two are consistent. They can be respectively inserted into the pipe openings of two pipes that need to be matched, and the two pipes can be calibrated to effectively reduce the ovality deviation and improve the welding efficiency and welding quality.

[0073] In a specific embodiment, the first piston 4111 and the first push plate 4121 can be coaxially connected and fixed by a first fastener (not shown in the figure); the second piston 4211 and the second push plate can be coaxially connected and fixed by a second fastener (not shown in the figure). The first fastener and the second fastener can be bolts, etc., and the details can be referred to the detailed description in the prior art, and no specific limitation is made here.

[0074] In the embodiment of the present invention, refer to Figure 1 and Figure 2 As shown, a first solenoid valve 34 is provided on the pipeline between the first accumulator 32 and the first oil cylinder 411, and the first solenoid valve 34 is used to control the flow direction and flow rate of the hydraulic oil between the first accumulator 32 and the first oil cylinder 411, so as to control the movement direction of the first piston 4111. Specifically, the first solenoid valve 34 can control the hydraulic oil in the first accumulator 32 to be injected into the first oil cylinder 411 from the first connecting port, and control the hydraulic oil in the first oil cylinder 411 to flow into the first accumulator 32 from the second connecting port, so that the first piston 4111 moves in the direction where the first push plate 4121 is located, so that the first expansion shoe 4124 tightens the inner wall of the pipeline; the first solenoid valve 34 can control the hydraulic oil in the first accumulator 32 to be injected into the first oil cylinder 411 from the second connecting port, and control the hydraulic oil in the first oil cylinder 411 to flow into the first accumulator 32 from the first connecting port, so that the first piston 4111 moves in the direction away from the first push plate 4121, so that the first expansion shoe 4124 leaves the inner wall of the pipeline.

[0075] In the embodiment of the present invention, refer to Figure 1 As shown, a second solenoid valve 35 is provided on the pipeline between the second accumulator 33 and the second oil cylinder 421, and the second solenoid valve 35 is used to control the flow direction and flow rate of the hydraulic oil between the second accumulator 33 and the second oil cylinder 421, so as to control the movement direction of the second piston 4211. Specifically, the second solenoid valve 35 can control the hydraulic oil in the second accumulator 33 to be injected into the second oil cylinder 421 from the third connecting port, and control the hydraulic oil in the second oil cylinder 421 to flow into the second accumulator 33 from the fourth connecting port, so that the second piston 4211 moves in the direction where the second push plate is located, so that the second expansion shoe tightens the inner wall of the pipeline; the second solenoid valve 35 can control the hydraulic oil in the second accumulator 33 to be injected into the second oil cylinder 421 from the fourth connecting port, and control the hydraulic oil in the second oil cylinder 421 to flow into the second accumulator 33 from the third connecting port, so that the second piston 4211 moves in the direction away from the second push plate, so that the second expansion shoe leaves the inner wall of the pipeline.

[0076] In a specific embodiment, referring to Figure 1 As shown, the hydraulic control unit 3 further includes a second pressure sensor 36 and a third pressure sensor 37. The second pressure sensor 36 is disposed in the hydraulic pipeline between the first accumulator 32 and the first solenoid valve 34, and is used to monitor the pressure of the hydraulic oil between the first accumulator 32 and the first solenoid valve 34, to ensure that the pressure of the hydraulic oil is within a preset range. The third pressure sensor 37 is disposed in the hydraulic pipeline between the second accumulator 33 and the second solenoid valve 35, and is used to monitor the pressure of the hydraulic oil between the second accumulator 33 and the second solenoid valve 35, to ensure that the pressure of the hydraulic oil is within a preset range.

[0077] In a specific embodiment, referring to Figure 1 As shown, the hydraulic control unit 3 also includes a hydraulic integrated block 38 for integrating hydraulic pipelines. The first pressure sensor 31, the second pressure sensor 36, the third pressure sensor 37, the first solenoid valve 34, the second solenoid valve 35, the first accumulator 32, the second accumulator 33 and the air pump assembly 21 can be connected to the hydraulic integrated block 38 through pipelines and joints, respectively, and the communication of the above-mentioned hydraulic pipelines is realized through a plurality of passages in the hydraulic integrated block 38.

[0078] In a specific embodiment, referring to Figure 1 As shown, the air pump assembly 21 includes an air motor 211, a coupling 212 and a pump head 213 connected in sequence. The air motor 211 is connected to the gas control valve 12, the pump head 213 is connected to the first accumulator 32 and the second accumulator 33 respectively, and the oil inlet of the pump head 213 is inserted into the oil tank 22; the compressed air can drive the air motor 211 to operate, and transmit the driving force to the pump head 213 through the coupling, so that the pump head 213 can pump the hydraulic oil in the oil tank 22 into the first accumulator 32 and the second accumulator 33.

[0079] In the embodiment of the present invention, refer to Figure 1 As shown, the oil inlet of the air pump assembly 21 is connected to the oil tank 22, and the oil outlet is divided into two ways to connect the first accumulator 32 and the second accumulator 33 respectively. The first pressure sensor 31 is arranged on the general passage between the air pump assembly 21 and the first accumulator 32 and the second accumulator 33, and can monitor the hydraulic pressure of the hydraulic oil in the first accumulator 32 and the second accumulator 33 in real time, and transmit the monitoring data to the controller 13 in the form of a signal. The controller 13 can control the switch of the gas control valve 12 according to the monitoring data of the first pressure sensor 31, and then control the start and stop of the air pump assembly 21, so that the pressure in the first accumulator 32 and the second accumulator 33 reaches the second preset pressure value, and when the pressure monitored by the first pressure sensor 31 is lower than the preset pressure threshold, the controller 13 promptly controls the air pump assembly 21 to start and pressurize the first accumulator 32 and the second accumulator 33.

[0080] In the embodiment of the present invention, the specific process of calibrating the pipe opening of the pipeline using the gas-liquid pressurization and tightening device may include:

[0081] The compressed air is filtered through the filter 111, and the pressure of the compressed air is adjusted to a first preset pressure value through the pressure regulating valve 112;

[0082] Open the gas control valve 12 to pass the regulated compressed air into the air pump assembly 21 to drive the air pump assembly 21 to operate, and the air pump assembly 21 pumps the hydraulic oil in the oil tank 22 into the first accumulator 32 and the second accumulator 33;

[0083] The hydraulic oil in the first accumulator 32 enters the first oil cylinder 411 under the drive of the air pump assembly 21, drives the first piston 4111 to move, and the first piston 4111 pushes the first push plate 4121 to push out the first push rod 4123, so that the first expansion shoe 4124 circumferentially supports the inner wall of the pipeline until the pipeline mouth is restored to the original design shape. Similarly, the hydraulic oil in the second accumulator 33 enters the second oil cylinder 421 under the drive of the air pump assembly 21, drives the second piston 4211 to move, and the second piston 4211 pushes the second push plate to push out the second push rod, so that the first expansion shoe 4124 circumferentially supports the inner wall of the pipeline until the pipeline mouth is restored to the original design shape.

[0084] During the process of the tensioning mechanism calibrating the pipe mouth, the pressure of the hydraulic oil in the first accumulator 32 and the second accumulator 33 is monitored in real time by the first pressure sensor 31, and the monitoring data is transmitted to the controller 13 in real time. When the monitored pressure is lower than the preset pressure threshold, the gas control valve 12 is controlled to open by the controller 13, and the air pump assembly 21 is started to continue to pump hydraulic oil into the first accumulator 32 and the second accumulator 33 until the pressure in the first accumulator 32 and the second accumulator 33 rises to the second preset pressure value to complete the energy storage, and the controller 13 controls the gas control valve 12 to close.

[0085] In the embodiment of the present invention, the first preset pressure value is the pressure value of the output compressed air, which can be 7-8 bar; the second preset pressure value is the pressure value reached after the first accumulator 32 and the second accumulator 33 are pressurized, which can be 100 bar; the preset pressure threshold is the lowest pressure value of the first accumulator 32 and the second accumulator 33 in the energy storage state, which can be 95 bar; thus, the tensioning force is greatly improved by the gas-liquid linkage pressurization. Obviously, the first preset pressure value, the second preset pressure value and the preset pressure threshold can be reasonably set and adjusted according to the actual situation, and are not limited to the above values.

[0086] The gas-liquid boosting and tightening device provided in the embodiment of the present invention combines the pneumatic pipeline and the hydraulic pipeline to realize the synchronous coordination of gas boosting and pressure regulation and hydraulic oil substantial boosting, so that lower gas pressure can be converted into higher hydraulic pressure, thereby greatly increasing the tightening force, and can effectively reduce the ovality deviation of the steel pipe orifice when calibrating the pipe orifice, thereby completing the precise assembly of the pipe orifice; and, the pressure monitoring result of the first pressure sensor 31 can be fed back to the controller 13 in real time, so that the gas control valve 12 can be adjusted in real time according to the pressure of the hydraulic pipeline, to ensure that the tightening force of the tightening assembly is always kept in a sufficiently large state, thereby improving the operating efficiency and the pipe orifice assembly effect, ensuring the welding quality and construction progress, and having a high engineering promotion and application value.

[0087] Embodiment 2

[0088] Based on the same inventive concept, an embodiment of the present invention further provides a method for using the gas-liquid pressurizing and tensioning device described in Embodiment 1, characterized in that it comprises:

[0089] S101: The pressure of the compressed air is adjusted to a first preset pressure value through the gas processing component 11, and the gas control valve 12 is opened to pass the regulated compressed air into the air pump component 21 to drive the air pump component 21 to pump the hydraulic oil in the oil tank 22 into the first accumulator 32 and the second accumulator 33;

[0090] S102: monitoring the pressures in the first accumulator 32 and the second accumulator 33 through the first pressure sensor 31, and transmitting the monitoring data to the controller 13;

[0091] S103: When the first pressure sensor 31 detects that the pressure in the first accumulator 32 and the second accumulator 33 reaches a second preset pressure value, the controller 13 controls the gas control valve 12 to close;

[0092] S104: injecting the hydraulic oil in the first accumulator 32 into the first tensioning assembly 41, and injecting the hydraulic oil in the second accumulator 33 into the second tensioning assembly 42, so that the first tensioning assembly 41 and the second tensioning assembly 42 are activated;

[0093] S105: When the first pressure sensor 31 detects that the pressure in the first accumulator 32 and the second accumulator 33 is lower than the preset pressure threshold, the controller 13 controls the gas control valve 12 to open, and continues to charge the first accumulator 32 and the second accumulator 33 to a second preset pressure value.

[0094] In the embodiment of the present invention, the method of using the gas-liquid pressurizing and tightening device corresponds to the gas-liquid pressurizing and tightening device described in Example 1. The specific implementation process can refer to the specific process of using the gas-liquid pressurizing and tightening device to realize the rounding of the pipe orifice in Example 1, and the repeated parts will not be repeated.

[0095] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A gas-liquid pressurizing and tightening device, used for rounding the pipe opening of a pipeline, characterized in that: It includes a pneumatic control unit, a gas-liquid booster unit, a hydraulic control unit and a tensioning unit; The pneumatic control unit comprises a gas processing assembly, a gas control valve and a controller connected in sequence; The gas processing component is connected to a gas source; The gas-liquid booster unit comprises an air pump assembly and an oil tank connected thereto, wherein the air pump assembly is connected to the gas control valve; The hydraulic control unit comprises a first pressure sensor, a first accumulator and a second accumulator; the first accumulator is connected to the air pump assembly, and the second accumulator is connected to the air pump assembly; the first pressure sensor is arranged in a hydraulic pipeline between the air pump assembly and the first accumulator and the second accumulator; When the gas control valve is in an open state, the air pump assembly operates to pump the hydraulic oil in the oil tank into the first accumulator and the second accumulator; and the first pressure sensor is connected to the controller, and the controller can control the switch of the gas control valve according to the monitoring result of the first pressure sensor; The tensioning unit includes a first tensioning component and a second tensioning component which are symmetrically arranged; the first tensioning component is connected to the first accumulator, and the hydraulic oil in the first accumulator can be injected into the first tensioning component to drive the first tensioning component to operate; the second tensioning component is connected to the second accumulator, and the hydraulic oil in the second accumulator can be injected into the second tensioning component to drive the second tensioning component to operate.

2. The gas-liquid pressurizing and tensioning device according to claim 1, characterized in that: The hydraulic control unit further includes a first solenoid valve and a second solenoid valve; The first solenoid valve is connected to the first accumulator and the first tensioner assembly, respectively, and is used to control the flow direction and flow rate of the hydraulic oil between the first accumulator and the first tensioner assembly; The second solenoid valve is connected to the second accumulator and the second tensioning assembly respectively, and is used to control the flow direction and flow rate of the hydraulic oil between the second accumulator and the second tensioning assembly.

3. The gas-liquid pressurizing and tensioning device according to claim 2, characterized in that: The hydraulic control unit further includes a second pressure sensor and a third pressure sensor; The second pressure sensor is arranged in the hydraulic pipeline between the first accumulator and the first solenoid valve; The third pressure sensor is disposed in the hydraulic pipeline between the second accumulator and the second solenoid valve.

4. The gas-liquid pressurizing and tensioning device according to claim 3, characterized in that: The hydraulic control unit also includes a hydraulic integrated block; The hydraulic integrated block is respectively connected to the first pressure sensor, the second pressure sensor, the third pressure sensor, the first solenoid valve, the second solenoid valve, the first accumulator and the second accumulator, and is used to integrate hydraulic pipelines.

5. The gas-liquid pressurizing and tensioning device according to claim 2, characterized in that: The first tensioning assembly includes a first oil cylinder and a first tensioning mechanism connected; The first oil cylinder is connected to the first solenoid valve; The first tensioning mechanism can extend into the pipeline and can press against the inner wall of the pipeline in the circumferential direction under the pressure of the first oil cylinder.

6. The gas-liquid pressurizing and tensioning device according to claim 5, characterized in that: The first oil cylinder and the first tensioning mechanism are connected and fixed by a first fastener.

7. The gas-liquid pressurizing and tensioning device according to claim 2, characterized in that: The second tensioning assembly includes a second oil cylinder and a second tensioning mechanism connected; The second oil cylinder is connected to the second solenoid valve; The second tensioning mechanism can extend into the pipeline and can press against the inner wall of the pipeline in the circumferential direction under the pressure of the second oil cylinder.

8. The gas-liquid pressurizing and tensioning device according to claim 7, characterized in that: The second oil cylinder and the second tensioning mechanism are connected and fixed by a second fastener.

9. The gas-liquid pressurizing and tensioning device according to claim 1, characterized in that: The air pump assembly includes an air motor, a coupling and a pump head which are connected in sequence; The pneumatic motor is connected to the gas control valve; The pump head is connected to the first accumulator and the second accumulator respectively; The oil inlet of the pump head is inserted into the oil tank.

10. The gas-liquid pressurizing and tensioning device according to claim 1, characterized in that: The gas processing assembly includes a filter, a pressure regulating valve and a pressure gauge; The filter is connected to the pressure regulating valve; The filter is connected to the gas source; The pressure regulating valve is connected to the gas control valve, and the pressure gauge is arranged in the hydraulic pipeline between the pressure regulating valve and the gas control valve.

11. A method for using the gas-liquid pressurizing and tensioning device according to any one of claims 1 to 10, characterized in that: include: Regulating the pressure of the compressed air to a first preset pressure value through the gas processing component, opening the gas control valve, and passing the regulated compressed air into the air pump component to drive the air pump component to pump the hydraulic oil in the oil tank into the first accumulator and the second accumulator; monitoring the pressure in the first accumulator and the second accumulator through a first pressure sensor, and transmitting the monitoring data to a controller; When the first pressure sensor monitors that the pressure in the first accumulator and the second accumulator reaches a second preset pressure value, the controller controls the gas control valve to close; Injecting the hydraulic oil in the first accumulator into the first tensioning assembly, and injecting the hydraulic oil in the second accumulator into the second tensioning assembly, so that the first tensioning assembly and the second tensioning assembly are in motion; When the first pressure sensor monitors that the pressure in the first accumulator and the second accumulator is lower than a preset pressure threshold, the controller controls the gas control valve to open and continues to charge the first accumulator and the second accumulator to a second preset pressure value.

Images