An oil pipeline valve processing positioning device

Abstract

The present invention belongs to the technical field of petroleum pipeline valve processing, and particularly relates to a positioning device for petroleum pipeline valve processing, which comprises a base detachably installed on the workbench of a machine tool. A positioning bottom plate is rotatably installed on the upper surface of the base, and a positioning clamping plate is supported above the positioning bottom plate by a hydraulic cylinder. Three groups of symmetric positioning blocks are installed on the corresponding wall surfaces of the positioning bottom plate and the positioning clamping plate. The symmetric surfaces of the symmetric positioning blocks are formed with arc-shaped positioning surfaces, and the arc-shaped positioning surfaces of the symmetric positioning blocks are in fitting contact with the outer ring surface of the flange of the pipeline valve to be processed. The positioning bottom plate and the positioning clamping plate are both provided with three groups of sliding adjustment mechanisms, and each group of sliding adjustment mechanisms is used for sliding adjustment of the distance between each group of symmetric positioning blocks; the present invention can prevent the valve clamped on the machine tool from being skewed due to the unevenness of the end faces of the three valve ports, which is likely to affect the accuracy of subsequent processing.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing of oil pipeline valves, and particularly relates to a positioning device for processing oil pipeline valves. Background Art

[0002] The production process in the oil industry includes oil and gas exploration, oil and gas field development, drilling engineering, oil production engineering, oil and gas gathering and transportation, crude oil storage and transportation, oil refining, chemical production, and oil product sales, etc. During the exploration and development of oil, oil pipelines are required for transportation; oil pipeline valves are aluminum alloy products for control valves in subsea oil fields with high requirements for strength and wear resistance, and high requirements for machining accuracy, roughness, and form and position accuracy.

[0003] When processing existing oil pipeline valves, most of them first process the valve body by casting, and the valve bodies after casting are mostly roughcast parts, which need to be clamped and installed on the corresponding machine tools for secondary finishing processing. For example, deburring the inner wall of the valve port of the valve body, or drilling the flange at the valve port of the valve body, and then other components can be assembled onto the valve body in sequence.

[0004] Since the valve body of the valve is a tee design, if the existing structures such as three-jaw chucks on machine tools are used to clamp and fix the valve for fine processing, it is obvious that the clamped valve cannot be accurately clamped and positioned. At the same time, since all three valve ports of the valve need to be subjected to secondary finishing processing, the existing clamping and positioning devices cannot accurately clamp and position the valve body of the valve on the workbench of the machine tool, and at the same time, the valve ports to be processed on the valve body can be adjusted without disassembly so that they can correspond to the machining tools on the machine tool for rapid and accurate machining. Summary of the Invention

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention provides a positioning device for processing oil pipeline valves, including a base, which is detachably installed on the workbench of a machine tool. A positioning bottom plate is rotatably installed on the upper surface of the base. A positioning clamping plate is suspended and supported above the positioning bottom plate by a hydraulic cylinder. Three groups of symmetric positioning blocks are installed on the corresponding wall surfaces of the positioning bottom plate and the positioning clamping plate. The distribution positions of the three groups of symmetric positioning blocks are the same as the positions of the flange plates of the pipeline valves to be processed. The symmetric surfaces of the symmetric positioning blocks are formed with arc-shaped positioning surfaces. The arc-shaped positioning surfaces of the symmetric positioning blocks are in fitting contact with the outer circumferential surfaces of the flange plates of the pipeline valves to be processed. The positioning bottom plate and the positioning clamping plate are both provided with three groups of sliding adjustment mechanisms, and each group of sliding adjustment mechanisms is used to slide and adjust the distance between each group of symmetric positioning blocks.

[0007] Furthermore, the sliding adjustment mechanism includes a guiding slider, a lead screw slider, an intermediate support block, an end support block, and a double-threaded lead screw. Three sliding guide grooves are provided on both the positioning base plate and the positioning clamping plate, and each sliding guide groove corresponds to the symmetric positioning block. The width of the sliding guide groove is smaller than the thickness of the positioning block. A guiding slider is slidably arranged in each sliding guide groove, and the upper end surface of the guiding slider is connected to the positioning block, and the lower end surface thereof is connected to the lead screw slider. The symmetric lead screw sliders slide and fit to the back surfaces of the positioning base plate and the positioning clamping plate. An intermediate support block is arranged between the symmetric lead screw sliders, and the intermediate support block is fixed to the middle position of the sliding guide groove. End support blocks are fixed at both ends of the sliding guide groove, and the end support blocks are located outside the lead screw sliders. A double-threaded lead screw is rotatably arranged between the end support blocks through bearings, and a lead screw slider is sleeved on the double-threaded lead screw through a lead screw nut. A servo motor is fixed to the outer side surface of one of the end support blocks, and the output shaft of the servo motor is connected to the end of the double-threaded lead screw.

[0008] Furthermore, a sleeve rod is vertically fixed to the lower surface of the positioning block located above, and a positioning rod is vertically arranged on the upper end surface of the positioning block located below. The positioning rod is slidably inserted into the sleeve rod.

[0009] Furthermore, a sliding deep groove is provided on the lower surface of the positioning block located below, and the sliding deep groove is arranged in a staggered manner with the connected guiding slider. A positioning square block is slidably arranged in the sliding deep groove. A plurality of limiting insertion blocks are installed on the lower surface of the positioning square block. A plurality of limiting insertion slots are equidistantly arranged along the length direction on both side walls of the sliding guide groove. A plurality of the limiting insertion blocks are slidably inserted into the aligned plurality of limiting insertion slots. A socket hole is opened upward at the bottom end pipe orifice of the sleeve rod, and the socket hole is sleeved on the positioning rod. The bottom end of the positioning rod slides downward and is inserted into the sliding deep groove, and the bottom end of the positioning rod is connected to the positioning square block through a pushing and resetting assembly.

[0010] Furthermore, the pushing and resetting assembly includes a pushing square block, a vertical support block, a reset spring, and a suspension spring. A plurality of the limiting insertion blocks are slidably inserted into a square hole opened on the positioning square block, and the upper orifice of the square hole is a countersunk square hole, and a support square frame formed by the outer circumferential surface of the top end of the limiting insertion block in contact with the countersunk square hole slides. The bottom end of the positioning rod slidably inserted into the sliding deep groove is connected to the pushing square block, and the lower surface of the positioning square block is fixedly connected to the upper surface of the positioning square block through at least two vertical support blocks. The vertical support blocks are staggered with the sliding limiting insertion blocks. The upper surface of the pushing square block is connected to the top wall of the sliding deep groove through at least two reset springs, and one of the reset springs is sleeved on the positioning rod. The top end of the limiting insertion block is connected to the lower surface of the pushing square block through a suspension spring.

[0011] Further, the lower surfaces of multiple groups of symmetric end support blocks are in rotational contact with the upper surface of the base. At least three groups of symmetric limiting jacks are provided on the upper surface of the base, and each group of symmetric limiting jacks corresponds to the symmetric end support blocks. A limiting deep groove is formed in the bottom end surface of the end support block, and a moving insert block is slidably inserted into the limiting deep groove. A pushing and inserting assembly is arranged at the top of the limiting deep groove, and the pushing and inserting assembly is used to push the moving insert block to slide and insert into the limiting jack.

[0012] Further, the pushing and inserting assembly includes a wear-resistant bladder, a bladder-shaped column, an air duct, and a spring member. The wear-resistant bladder is fixedly arranged on the wall of the limiting slot. A bladder-shaped column is vertically connected to the top wall of the limiting deep groove, and the bottom end of the bladder-shaped column is connected to the moving insert block. The bladder-shaped column is communicated with multiple wear-resistant bladders through the air duct. The spring member is vertically arranged in the bladder-shaped column, and its two ends are connected to the upper and lower ends of the bladder-shaped column.

[0013] Further, at least two guide rods are vertically fixed to the rear end of the positioning base plate, and the two guide rods are located on both sides of the hydraulic cylinder. A guide sleeve slidably sleeved with the guide rods is fixed to the rear end of the positioning clamping plate.

[0014] The present invention has the following beneficial effects:

[0015] 1. By installing at least three groups of symmetric positioning blocks on the corresponding wall surfaces of the positioning base plate and the upper positioning clamping plate, and the operation of the three sliding adjustment mechanisms, they respectively push the symmetric positioning blocks to approach each other, making the distance between them similar to the size of the flange of the valve to be clamped and positioned. Then, the valve to be processed is placed on the positioning base plate. Furthermore, the arc-shaped positioning surfaces of the four symmetric positioning blocks on the upper, lower, left, and right sides will form a circular ring to clamp and fix the flanges at the three valve ports of the valve. It can not only effectively clamp and fix the valve to be processed, but also play a role in clamping and positioning the valve to be processed, preventing the valve clamped on the machine tool from tilting due to the uneven end faces of the three valve ports, which is likely to affect the accuracy of subsequent processing. Moreover, it will not affect the grinding head clamped on the machine tool to grind the inside of the three valve ports and the tool to drill the three flanges of the valve.

[0016] 2. In the present invention, a sliding positioning square block is arranged in a sliding deep groove formed on the lower surface of the positioning block. Since the socket hole is in a blind hole state, it will generate a downward thrust on the positioning rod arranged in a sliding manner, causing it to slide downward. Furthermore, it will drive the positioning square block to slide downward in the sliding deep groove through the pushing and resetting assembly. At this time, the downward-sliding positioning square block will drive a plurality of limiting insertion blocks to slide downward and insert into a plurality of aligned limiting slots. At this time, the positioning square block continues to be located in the sliding deep groove. Therefore, the cooperation between the plurality of limiting insertion blocks and the plurality of limiting slots can play a role in horizontally limiting and blocking the symmetrical positioning blocks on the upper surface of the positioning bottom plate, preventing the clamping force received by the flange of the valve from acting on the symmetrical positioning blocks below, and thus preventing the phenomenon that the positioning blocks generate slight horizontal sliding, which will affect the accuracy of clamping and positioning of the valve.

[0017] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure disclosed by the present invention;

[0020] Figure 2 is a schematic diagram of the back structure of the positioning device disclosed by the present invention;

[0021] Figure 3 is a schematic diagram of the structure of three groups of symmetrical positioning blocks on the positioning bottom plate disclosed by the present invention;

[0022] Figure 4 is a cross-sectional view of the positioning block disclosed by the present invention;

[0023] Figure 5 is disclosed by the present invention Figure 4 local enlarged view at A in;

[0024] Figure 6 is disclosed by the present invention Figure 4 local enlarged view at B in.

[0025] In the figure: 1. Base; 11. Limit jack;

[0026] 2. Positioning bottom plate; 21. Sliding guide groove; 22. Limit slot;

[0027] 3. Hydraulic cylinder;

[0028] 4. Positioning clamping plate;

[0029] 5. Positioning block; 51. Sliding deep groove;

[0030] 6. Sliding adjustment mechanism; 61. Guide slider; 62. Lead screw slider; 63. Intermediate support block; 64. End support block; 641. Limit deep groove; 65. Double-threaded lead screw; 66. Sleeve rod; 67. Positioning rod; 68. Positioning square block; 681. Square hole; 69. Limit insertion block;

[0031] 7. Pushing and resetting assembly; 71. Pushing square block; 72. Vertical support block; 73. Reset spring; 74. Suspension spring;

[0032] 8. Pushing and inserting assembly; 81. Moving insertion block; 82. Wear-resistant bladder; 83. Bladder column; 84. Air duct; 85. Spring member;

[0033] 9. Guide rod; 91. Guide sleeve. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0036] Please refer to Figures 1 - 6As shown in the figure, the present invention is a positioning device for processing oil pipeline valves, including a base 1, which is detachably installed on the workbench of a machine tool. A positioning base plate 2 is rotatably installed on the upper surface of the base 1. A positioning clamping plate 4 is suspended and supported above the positioning base plate 2 by a hydraulic cylinder 3. Three groups of symmetric positioning blocks 5 are installed on the corresponding wall surfaces of the positioning base plate 2 and the positioning clamping plate 4. The distribution positions of the three groups of symmetric positioning blocks 5 are the same as the positions of the flange plates of the pipeline valves to be processed. The symmetric surfaces of the symmetric positioning blocks 5 are formed with arc-shaped positioning surfaces. The arc-shaped positioning surfaces of the symmetric positioning blocks 5 are in fitting contact with the outer circumferential surfaces of the flange plates of the pipeline valves to be processed. The positioning base plate 2 and the positioning clamping plate 4 are both provided with three groups of sliding adjustment mechanisms 6. Each group of the sliding adjustment mechanisms 6 is used to slide and adjust the distance between each group of symmetric positioning blocks 5.

[0037] Specifically, in the present invention, the base 1 is detachably installed on the workbench of the machine tool, and at least three groups of symmetric positioning blocks 5 are installed on the corresponding wall surfaces of the positioning base plate 2 and the upper positioning clamping plate 4. When it is necessary to clamp and position the cast blank valve, at this time, the piston rod of the hydraulic cylinder 3 is controlled to extend, so that it pushes the positioning clamping plate 4 to rise vertically. Then, first, through the operation of the three groups of sliding adjustment mechanisms 6 on the lower surface of the positioning base plate 2, they respectively push the symmetric positioning blocks 5 to approach each other, so that the distance between the two is similar to the size of the flange plate of the valve to be clamped and positioned. Then, the valve to be processed is placed on the positioning base plate 2, and the flange plates at its three valve ports are in fitting contact with the arc-shaped positioning surfaces of the three groups of symmetric positioning blocks 5. Then, the piston rod of the hydraulic cylinder 3 is controlled to retract, so that it drives the three groups of symmetric positioning blocks 5 adjusted on the lower surface of the positioning clamping plate 4 to descend synchronously and fit onto the flange plates at the three valve ports. Furthermore, the arc-shaped positioning surfaces of the four positioning blocks 5 symmetrically arranged up, down, left, and right will form a circular ring to clamp and fix the flange plates at the three valve ports of the valve, which can not only effectively clamp and fix the valve to be processed, but also play a role in clamping and positioning the valve to be processed, preventing the valve clamped on the machine tool from tilting due to the uneven end faces of the three valve ports, which is likely to affect the accuracy of subsequent processing. When one valve port of the valve is processed, the operator can control the servo motor on the base 1 to work, so that it drives the positioning base plate 2 and the clamped positioning clamping plate 4 to rotate synchronously, so that the other two valve ports to be processed are sequentially rotated to the corresponding tool positions, realizing precise processing of the three valve ports of the valve in sequence, without the need for manual disassembly and adjustment of the valve port angle for re-clamping and positioning. When the fine processing of the valve is completed, the piston rod of the hydraulic cylinder 3 is controlled to rise slowly, so that the multiple groups of positioning blocks 5 on the positioning clamping plate 4 are separated from the clamping and positioning of the flange plate of the valve. Then, the processed valve is taken off and stored from the multiple groups of symmetric positioning blocks 5 above the positioning base plate 2, and then the valve to be processed is continued to be clamped on the positioning device for subsequent processing.

[0038] In this embodiment, the sliding adjustment mechanism 6 includes a guiding slider 61, a lead screw slider 62, an intermediate support block 63, an end support block 64 and a double - helix lead screw 65. Three sliding guide grooves 21 are formed on both the positioning base plate 2 and the positioning clamping plate 4, and each sliding guide groove 21 corresponds to the symmetric positioning block 5. The width of the sliding guide groove 21 is smaller than the thickness of the positioning block 5. A guiding slider 61 is slidably arranged in each sliding guide groove 21. The upper end surface of the guiding slider 61 is connected to the positioning block 5, and its lower end surface is connected to the lead screw slider 62. The symmetric lead screw sliders 62 slide and fit to the back surfaces of the positioning base plate 2 and the positioning clamping plate 4. An intermediate support block 63 is arranged between the symmetric lead screw sliders 62, and the intermediate support block 63 is fixed to the middle position of the sliding guide groove 21. End support blocks 64 are fixed at both ends of the sliding guide groove 21, and the end support blocks 64 are located outside the lead screw sliders 62. A double - helix lead screw 65 is rotatably arranged between the end support blocks 64 through bearings, and a lead screw slider 62 is sleeved on the double - helix lead screw 65 through a lead screw nut. A servo motor is fixed to the outer side surface of one of the end support blocks 64, and the output shaft of the servo motor is connected to the end of the double - helix lead screw 65;

[0039] Specifically, the servo motor fixed to the outer side surface of the end support block 64 drives the double - helix lead screw 65 to rotate, so that it drives the symmetric lead screw sliders 62 to slide synchronously closer to or away from each other through the lead screw nuts. Further, the guiding slider 61 will slide in the sliding guide groove 21, which will drive the symmetric positioning blocks 5 to approach or move away from each other, so as to realize the adjustment of the distance between them, thereby improving the accuracy and stability of clamping and positioning the flange of the valve. Since the width of the sliding guide groove 21 is smaller than the thickness of the positioning block 5, the gravity of the valve and the clamping force of the upper positioning clamping plate 4 on the valve will only act on the positioning base plate 2 through the positioning block 5 and will not be transmitted to the double - helix lead screw 65 through the guiding slider 61. Therefore, the double - helix lead screw 65 will not be damaged during long - term use. The cooperation of the symmetric end support blocks 64 and the intermediate support block 63 can limit the sliding lead screw sliders 62, preventing the symmetric positioning blocks 5 from sliding too much and being unable to be adjusted quickly and accurately. The protective cover installed above the positioning clamping plate 4 can protect the sliding adjustment mechanism 6 on its upper surface, preventing dust or iron filings from processing from falling in.

[0040] In this embodiment, a sleeve rod 66 is vertically fixed to the lower surface of the upper positioning block 5, and a positioning rod 67 is vertically arranged on the upper end surface of the lower positioning block 5. The positioning rod 67 is slidably inserted into the sleeve rod 66;

[0041] Specifically, when the symmetric positioning blocks 5 above descend and fit with the upper outer ring surface of the flange of the valve, at this time, the sleeve rods 66 symmetrically arranged on the lower surface of the positioning blocks 5 will slowly sleeve on the positioning rods 67 vertically arranged on the upper surface of the lower positioning blocks 5. The cooperation between the sleeved sleeve rods 66 and the positioning rods 67 can play a role in positioning and guiding the upper and lower positioning blocks 5, preventing the upper positioning blocks 5 from being slightly misaligned with the lower positioning blocks 5 when the arc-shaped positioning surfaces of the upper positioning blocks 5 descend and fit with the flange of the valve, and affecting the precise and stable clamping and positioning process of the arc-shaped positioning surfaces of the four positioning blocks 5 surrounding the flange of the valve in a circular shape.

[0042] In this embodiment, a sliding deep groove 51 is formed on the lower surface of the positioning block 5 located below, and the sliding deep groove 51 is offset from the connected guiding slider 61. A positioning square block 68 is slidably arranged in the sliding deep groove 51. A plurality of limiting insertion blocks 69 are installed on the lower surface of the positioning square block 68. A plurality of limiting insertion slots 22 are equidistantly formed on the two side walls of the sliding guide groove 21 along its length direction. The plurality of limiting insertion blocks 69 are slidably inserted into the aligned plurality of limiting insertion slots 22. A socket hole is formed upward at the bottom end pipe orifice of the sleeve rod 66, and the socket hole sleeves on the positioning rod 67. The bottom end of the positioning rod 67 slides downward and is inserted into the sliding deep groove 51, and the bottom end of the positioning rod 67 is connected to the positioning square block 68 through a top-pushing and resetting assembly 7;

[0043] Specifically, when the symmetric positioning blocks 5 above descend and fit onto the outer circumferential surface of the flange, at this time, the clamping force received by the flange will be transmitted to the symmetric positioning blocks 5 below. Therefore, a horizontal thrust will be generated on the positioning blocks 5 below, and then it will act on the double-threaded lead screw 65 through the guiding slider 61, which is likely to damage the thread teeth of the double-threaded lead screw 65. Therefore, when the symmetric positioning blocks 5 above descend, at this time, the socket holes on the sleeve rod 66 will be socketed onto the positioning rod 67. Since the socket holes are in a blind hole state, a downward thrust will be generated on the slidably arranged positioning rod 67 to make it slide downward. Furthermore, it will drive the positioning square block 68 to slide downward in the sliding groove 51 through the top-pushing and resetting assembly 7. At this time, the downward-sliding positioning square block 68 will drive a plurality of limiting insertion blocks 69 to slide downward and insert into the aligned plurality of limiting slots 22. And at this time, the positioning square block 68 is still located in the sliding groove 51. Furthermore, the cooperation between the plurality of limiting insertion blocks 69 and the plurality of limiting slots 22 can play a role in horizontally limiting and blocking the symmetric positioning blocks 5 on the upper surface of the positioning base plate 2, preventing the clamping force received by the flange of the valve from acting on the symmetric positioning blocks 5 below, which may cause a slight horizontal slip of the positioning blocks 5, thus affecting the accuracy of clamping and positioning of the valve. And when the positioning blocks 5 above are disengaged from the flange, at this time, the sleeve rod 66 is disengaged from the positioning rod 67, and the top-pushing and resetting assembly 7 will drive the positioning square block 68 to slide upward in the sliding groove 51. Furthermore, it will drive a plurality of limiting insertion blocks 69 to retract from the limiting slots 22, enabling the symmetric positioning blocks 5 below to freely slide and adjust under the drive of the double-threaded lead screw 65.

[0044] In this embodiment, the top-pushing and resetting assembly 7 includes a top-pushing square block 71, a vertical support block 72, a reset spring 73, and a suspension spring 74. A plurality of the limiting insertion blocks 69 are slidably inserted into a square hole 681 opened on the positioning square block 68. The upper hole opening of the square hole 681 is a countersunk square hole, and the support square frame formed between the inner surface of the countersunk square hole and the outer circumferential surface of the top end of the limiting insertion block 69 is in sliding contact. The bottom end of the positioning rod 67 slidably inserted into the sliding groove 51 is connected to the top-pushing square block 71. And the lower surface of the positioning square block 68 is fixedly connected to the upper surface of the positioning square block 68 through at least two vertical support blocks 72. The vertical support blocks 72 are staggered from the slidable limiting insertion blocks 69. The upper surface of the top-pushing square block 71 is connected to the top wall of the sliding groove 51 through at least two reset springs 73, and one of the reset springs 73 is sleeved on the positioning rod 67. The top end of the limiting insertion block 69 is connected to the lower surface of the top-pushing square block 71 through a suspension spring 74.

[0045] Specifically, when the positioning rod 67 slides within the sliding deep groove 51, it will push the pushing square block 71 to slide downward within the sliding deep groove 51 at this time, and the suspension spring 74 will be stretched. Since the pushing square block 71 is connected to the positioning square block 68 through the vertical support block 72, it will further push the limit insertion block 69 on the positioning square block 68 to slide downward and insert into the limit insertion hole 11. If one of the limit insertion blocks 69 is not aligned with the corresponding limit slot 22, when the positioning square block 68 slides downward within the sliding deep groove 51 at this time, it will cause the non-aligned limit insertion block 69 to move upward relatively within the square hole 681. At this time, the return spring 73 at the top of the relatively sliding limit insertion block 69 will be compressed. Therefore, when the positioning square block 68 slides downward, it will not be interfered by the non-aligned limit insertion block 69 and be unable to drive the other several limit insertion blocks 69 to normally insert into the limit slots 22, thus affecting the cooperation between the multiple limit insertion blocks 69 and the limit slots 22 and the function of horizontally sliding and limiting the symmetric positioning blocks 5; when the sleeve rod 66 disengages from the positioning rod 67, the elastic restoring force of the suspension spring 74 will pull the pushing square block 71 to slide upward within the sliding deep groove 51 at this time, and then the positioning square block 68 will slide upward synchronously. At this time, the elastic restoring force of the compressed return spring 73 will push one of the limit insertion blocks 69 to slide downward to make its bottom flush with the bottoms of the other several limit insertion blocks 69, thus facilitating the multiple limit insertion blocks 69 to slide to the next position and be inserted and corresponding to the multiple limit slots 22.

[0046] In this embodiment, the lower surfaces of multiple groups of symmetric end support blocks 64 are in rotational contact with the upper surface of the base 1. At least three groups of symmetric limit insertion holes 11 are provided on the upper surface of the base 1, and each group of symmetric limit insertion holes 11 corresponds to the symmetric end support blocks 64. A limit deep groove 641 is provided at the bottom end surface of the end support block 64, and a moving insertion block 81 is slidably inserted within the limit deep groove 641. A pushing and inserting assembly 8 is provided at the top of the limit deep groove 641, and the pushing and inserting assembly 8 is used to push the moving insertion block 81 to slide and insert into the limit insertion hole 11.

[0047] Specifically, the end support block 64 is in rotational contact with the upper surface of the base 1, which can play a role of gravity support for the positioning base plate 2, preventing the gravity of the positioning base plate 2 and other components from directly acting on the output shaft of the servo motor inside the base 1, thereby affecting its normal use; when the rotated end support block 64 is aligned with the corresponding limit socket 11, the movable plug block 81 in the limit deep groove 641 will slide downward and be inserted into the limit socket 11 through the push-in assembly 8, and the upper half of the movable plug block 81 will remain in the limit deep groove 641, thereby facilitating the end support block 64 to play a role of limiting and fixing, preventing the processed valve body from being subjected to impact force on the positioning base plate 2, causing the positioning base plate 2 to rotate; and when the positioning base plate 2 needs to rotate, the push-in assembly 8 will drive the movable plug block 81 to slide upward into the limit deep groove 641, and its bottom will be detached from the limit socket 11, thereby facilitating the positioning base plate 2 to continue to rotate normally.

[0048] In this embodiment, the push-insertion assembly 8 includes a wear-resistant capsule 82, a capsule-shaped column 83, an air guide tube 84 and a spring member 85. The wear-resistant capsule 82 is fixedly arranged on the groove wall of the limiting slot 22. The groove top wall of the limiting deep groove 641 is vertically connected with the capsule-shaped column 83, and the bottom end of the capsule-shaped column 83 is connected to the movable plug block 81. The capsule-shaped column 83 is connected to multiple wear-resistant capsules 82 through the air guide tube 84. The spring member 85 is vertically arranged in the capsule-shaped column 83, and its two ends are connected to the upper and lower ends of the capsule-shaped column 83.

[0049] Specifically, when multiple limiting inserts 69 slide downward and insert into the limiting slots 22, the limiting inserts 69 will squeeze the wear-resistant bladder 82 at this time. This enables the wear-resistant bladder 82 not only to increase the frictional force with the limiting inserts 69 to improve the stability of their insertion, but also the gas in the wear-resistant bladder 82 will enter the bladder-shaped column 83 through the air duct 84, causing the bladder-shaped column 83 to expand vertically in the limiting deep groove 641. At this time, the spring member 85 will be stretched, and then the expansion of the bladder-shaped column 83 will push the movable insert 81 to slide downward and insert into the limiting socket 11, realizing the pushing and sliding of the movable insert 81; when the upper positioning block 5 drives the sleeve rod 66 to slowly rise, and the sleeve rod 66 does not completely disengage from the positioning rod 67, at this time, the positioning rod 67 will slowly rise in the sliding deep groove 51, causing the positioning square block 68 to drive the limiting insert 69 to disengage upward from the limiting slot 22. The wear-resistant bladder 82 will be disengaged and squeezed. At this time, the elastic restoring force of the spring member 85 in the bladder-shaped column 83 will drive it to contract, causing the movable insert 81 to retract from the limiting socket 11. At this time, the gas in the bladder-shaped column 83 will enter the wear-resistant bladder 82 through the air duct 84, facilitating the quick extraction of the movable insert 81 from the limiting socket 11, and thus facilitating the rotation of the positioning base plate 2 on the upper surface of the base 1. Since the symmetric positioning blocks 5 are disengaged from the limit, and the upper and lower two groups of symmetric positioning blocks 5 are mutually limited and connected through the sleeve rod 66 and the positioning rod 67, therefore, by operating the upper and lower symmetric driving double-threaded lead screws 65, the upper and lower symmetric positioning blocks 5 can be synchronously and finely adjusted, and then the rotated and adjusted valve can be re-clamped and fixed again, so that the valve port of the rotated and adjusted valve can be more accurately aligned with the tool on the machine tool for processing.

[0050] In this embodiment, at least two guide rods 9 are vertically fixed to the rear end of the positioning base plate 2, and the two guide rods 9 are located on both sides of the hydraulic cylinder 3. A guide sleeve 91 slidably sleeved with the guide rods 9 is fixed to the rear end of the positioning clamp plate 4; specifically, the cooperation of the guide rods 9 and the guide sleeves 91 can play a role in vertically guiding the positioning clamp plate 4 moving up and down, preventing the positioning clamp plate 4 from tilting when lifting and lowering.

[0051] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A petroleum pipeline valve processing and positioning device, characterized in that: The invention comprises a base (1) which can be detachably mounted on a working table of a machine tool, a positioning base plate (2) being rotatably mounted on the upper surface of the base (1), a positioning clamping plate (4) being suspended and supported by a hydraulic cylinder (3) directly above the positioning base plate (2), three groups of symmetrical positioning blocks (5) being mounted on the wall surfaces corresponding to the positioning base plate (2) and the positioning clamping plate (4), the distribution positions of the three groups of symmetrical positioning blocks (5) being the same as the positions of the flanges of the pipeline valves to be processed, the symmetrical surfaces of the symmetrical positioning blocks (5) forming arc-shaped positioning surfaces, the arc-shaped positioning surfaces of the symmetrical positioning blocks (5) being in close contact with the outer ring surfaces of the flanges of the pipeline valves to be processed, the positioning base plate (2) and the positioning clamping plate (4) being mounted with three groups of sliding adjustment mechanisms (6), each group of the sliding adjustment mechanisms (6) being used to perform sliding adjustment on the distance between each group of symmetrical positioning blocks (5); The sliding adjustment mechanism (6) comprises a guide slider (61), a screw slider (62), an intermediate support block (63), an end support block (64) and a double-rotation screw (65); three sliding guide grooves (21) are provided on the positioning base plate (2) and the positioning clamping plate (4); each sliding guide groove (21) corresponds to a symmetrical positioning block (5); the width of the sliding guide groove (21) is smaller than the thickness of the positioning block (5); the groove walls on both sides of the sliding guide groove (21) are provided with a plurality of limit slots (22) equidistantly along the length direction thereof; a guide slider (61) is slidably provided in each sliding guide groove (21); the upper end surface of the guide slider (61) is connected to the positioning block (5), and the lower end surface thereof is connected to the screw slider (62); The lead screw slider (62) is slidably fitted to the back of the positioning base plate (2) and the positioning clamping plate (4), an intermediate support block (63) is symmetrically arranged between the lead screw sliders (62), and the intermediate support block (63) is fixed to the middle position of the sliding guide groove (21), the two ends of the sliding guide groove (21) are fixed with end support blocks (64), and the end support blocks (64) are located on the outside of the lead screw slider (62), a double-rotation screw (65) is rotatably arranged between the end support blocks (64) through bearings, and the lead screw slider (62) is sleeved on the double-rotation screw (65) through a screw nut, a servo motor is fixed to the outer side surface of one of the end support blocks (64), and the output shaft of the servo motor is connected to the end of the double-rotation screw (65); The lower surfaces of the multiple groups of symmetrical end support blocks (64) are in rotational contact with the upper surface of the base (1); the upper surface of the base (1) is provided with at least three groups of symmetrical limit plug holes (11), and each group of symmetrical limit plug holes (11) corresponds to the symmetrical end support block (64); the bottom end surface of the end support block (64) is provided with a limited depth groove (641), and a movable plug block (81) is slidably inserted in the limited depth groove (641); a push-insertion component (8) is provided at the top of the limited depth groove (641), and the push-insertion component (8) is used to push the movable plug block (81) to slide and insert into the limited plug hole (11); The push-insertion assembly (8) comprises a wear-resistant sac (82), a sac-shaped column (83), an air guide tube (84) and a spring member (85); the wear-resistant sac (82) is fixedly arranged on the groove wall of the limiting slot (22); the groove top wall of the limiting deep groove (641) is vertically connected with the sac-shaped column (83), and the bottom end of the sac-shaped column (83) is connected to the movable plug block (81); the sac-shaped column (83) is connected to the plurality of wear-resistant sacs (82) through the air guide tube (84); the spring member (85) is vertically arranged in the sac-shaped column (83), and its two ends are connected to the upper and lower ends of the sac-shaped column (83).

2. The oil pipeline valve processing and positioning device according to claim 1 is characterized in that: A sleeve rod (66) is vertically fixed to the lower surface of the positioning block (5) located at the top, and a positioning rod (67) is vertically arranged on the upper end surface of the positioning block (5) located at the bottom. The positioning rod (67) is slidably inserted into the sleeve rod (66).

3. The oil pipeline valve processing and positioning device according to claim 2 is characterized in that: The lower surface of the positioning block (5) located at the bottom is provided with a sliding deep groove (51), and the sliding deep groove (51) is offset from the connected guide sliding block (61). A positioning block (68) is slidably arranged in the sliding deep groove (51), and a plurality of limit plugs (69) are installed on the lower surface of the positioning block (68). The plurality of limit plugs (69) are slidably inserted into a plurality of aligned limit slots (22). The bottom end of the sleeve rod (66) is provided with a sleeve hole facing upward, and the sleeve hole is sleeved on the positioning rod (67). The bottom end of the positioning rod (67) slides downward and is inserted into the sliding deep groove (51), and the bottom end of the positioning rod (67) is connected to the positioning block (68) through a push-reset assembly (7).

4. The oil pipeline valve processing and positioning device according to claim 3 is characterized in that: The push-reset assembly (7) comprises a push-up block (71), a vertical support block (72), a reset spring (73) and a suspension spring (74); a plurality of the limit plugs (69) are slidably inserted into a square hole (681) provided on the positioning block (68); the upper opening of the square hole (681) is a countersunk square hole; the countersunk square hole is in sliding contact with a support frame formed by an outer ring surface of the top end of the limit plug (69); the bottom end of the positioning rod (67) slidably inserted into the sliding deep groove (51) is connected to the push-up block (71); The lower surface of the positioning block (68) is fixedly connected to the upper surface of the positioning block (68) through at least two vertical support blocks (72), and the vertical support blocks (72) are staggered with the sliding limit plug block (69). The upper surface of the pushing block (71) is connected to the top groove wall of the sliding deep groove (51) through at least two return springs (73), and one of the return springs (73) is sleeved on the positioning rod (67). The top end of the limit plug block (69) is connected to the lower surface of the pushing block (71) through a suspension spring (74).

5. The oil pipeline valve processing and positioning device according to claim 1 is characterized in that: At least two guide rods (9) are vertically fixed to the rear end of the positioning base plate (2), and the two guide rods (9) are located on both sides of the hydraulic cylinder (3). The rear end of the positioning clamping plate (4) is fixed with a guide sleeve (91) that is slidably sleeved with the guide rod (9).

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