Petroleum pipeline valve machining and positioning device

Abstract

The invention belongs to the technical field of petroleum pipeline valve machining, and particularly relates to a petroleum pipeline valve machining positioning device which comprises a base detachably installed on a 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 over the positioning bottom plate through a hydraulic cylinder. Three sets of symmetrical positioning blocks are installed on the corresponding wall faces of the positioning bottom plate and the positioning clamping plate, the symmetrical surfaces of the symmetrical positioning blocks form arc-shaped positioning faces, the arc-shaped positioning faces of the symmetrical positioning blocks make contact with the outer ring face of a flange plate of a to-be-machined pipeline valve in an attached mode, and the positioning bottom plate and the positioning clamping plate are each provided with three sets of sliding adjusting mechanisms. Each group of sliding adjustment mechanism is used for carrying out sliding adjustment on the distance between each group of symmetrical positioning blocks; the valve clamping device can prevent a valve clamped on a machine tool from skewing due to the fact that the end faces of three valve ports are not flush, and consequently the precision of follow-up machining treatment is easily affected.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pipeline valve processing, and in particular relates to an oil pipeline valve processing positioning device. Background Art

[0002] The production process of the petroleum 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. In the process of exploration and development, oil needs to be transported by oil pipelines; oil pipeline valves are a kind of submarine oilfield control valve body aluminum alloy products with high strength and high wear resistance requirements, and require high processing accuracy, roughness and shape and position accuracy.

[0003] When processing existing oil pipeline valves, most of them first process the valve body by casting. The valve body after casting is mostly a blank, which needs to be clamped and installed on the corresponding machine tool for secondary finishing, such as grinding and 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 parts can be assembled to the valve body in sequence.

[0004] However, since the valve body is a three-way design, if the three-jaw chuck on the existing machine tool is used to clamp and fix the valve and then perform fine processing, it is obviously impossible to accurately clamp and position the clamped valve. At the same time, since the valve has three valve ports that need to be finely processed, the existing clamping and positioning device cannot accurately clamp and position the valve body on the workbench of the machine tool, and can adjust the valve port to be processed of the valve body without disassembling it, so that it can be quickly and accurately processed corresponding to the processing tool on the machine tool. Summary of the invention

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a petroleum pipeline valve processing and positioning device, comprising a base, which can be detachably mounted on a workbench of a machine tool, a positioning base plate being rotatably mounted on the upper surface of the base, a positioning clamping plate being suspended and supported by a hydraulic cylinder directly above the positioning base plate, three groups of symmetrical positioning blocks being mounted on the wall surfaces corresponding to the positioning base plate and the positioning clamping plate, the distribution positions of the three groups of symmetrical positioning blocks being the same as the positions of the flanges of the pipeline valves to be processed, the symmetrical surfaces of the symmetrical positioning blocks forming arc-shaped positioning surfaces, the arc-shaped positioning surfaces of the symmetrical positioning blocks being in close contact with the outer ring surfaces of the flanges of the pipeline valves to be processed, the positioning base plate and the positioning clamping plate being mounted with three groups of sliding adjustment mechanisms, each group of the sliding adjustment mechanisms being used for slidingly adjusting the distance between each group of symmetrical positioning blocks.

[0006] Furthermore, the sliding adjustment mechanism includes a guide slider, a screw slider, an intermediate support block, an end support block and a double-rotation screw, the positioning base plate and the positioning clamp plate are each provided with three sliding guide grooves, and each sliding guide groove corresponds to the symmetrical positioning block, the width of the sliding guide groove is smaller than the thickness of the positioning block, a guide slider is slidably arranged in each of the sliding guide grooves, and the upper end surface of the guide slider is connected to the positioning block, and its lower end surface is connected to the screw slider, the symmetrical screw sliders slide and fit into the back of the positioning base plate and the positioning clamp plate, an intermediate support block is symmetrically arranged between the 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 at the outside of the screw slider, a double-rotation screw is rotatably arranged between the end support blocks through bearings, and a screw slider is sleeved on the double-rotation screw through a 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-rotation screw.

[0007] Furthermore, a sleeve rod is vertically fixed to the lower surface of the positioning block located at the top, and a positioning rod is vertically arranged on the upper end surface of the positioning block located at the bottom, and the positioning rod is slidably inserted into the sleeve rod.

[0008] Furthermore, a deep sliding groove is provided on the lower surface of the positioning block located below, and the deep sliding groove is staggered with the connected guide sliding block, a positioning block is slidably arranged in the deep sliding groove, and a plurality of limit plugs are installed on the lower surface of the positioning block, and a plurality of limit slots are equidistantly provided on the groove walls on both sides of the sliding guide groove along its length direction, and a plurality of limit plugs are slidably inserted into the aligned plurality of limit slots, a sleeve hole is provided upwardly at the bottom end of the sleeve rod, and the sleeve hole is sleeved on the positioning rod, and the bottom end portion of the positioning rod slides downwardly and is inserted into the deep sliding groove, and the bottom end portion of the positioning rod is connected to the positioning block through a push-reset assembly.

[0009] Furthermore, the pushing and resetting assembly includes a pushing block, a vertical support block, a return spring and a suspension spring, and the plurality of limit blocks are slidably inserted into the square holes opened on the positioning block, and the upper openings of the square holes are countersunk square holes, and the countersunk square holes are in sliding contact with the supporting frame formed by the outer ring surface of the top end of the limit block, and the bottom end of the positioning rod slidably inserted into the sliding deep groove is connected with a pushing block, and the lower surface of the positioning block is fixedly connected to the upper surface of the positioning block by at least two vertical support blocks, the vertical support block is staggered with the sliding limit block, the upper surface of the pushing block is connected to the top groove wall of the sliding deep groove by at least two return springs, and one of the return springs is sleeved on the positioning rod, and the top end of the limit block is connected to the lower surface of the pushing block by a suspension spring.

[0010] Furthermore, the lower surfaces of the multiple groups of symmetrical end support blocks are in rotational contact with the upper surface of the base, the upper surface of the base is provided with at least three groups of symmetrical limit holes, and each group of symmetrical limit holes corresponds to the symmetrical end support blocks, the bottom end surface of the end support block is provided with a limited depth groove, and a movable plug block is slidably inserted in the limited depth groove, and a push-insertion component is provided at the top of the limited depth groove, and the push-insertion component is used to push the movable plug block to slide into the limit hole.

[0011] Furthermore, the push-and-insert assembly includes a wear-resistant sac, a sac-shaped column, an air guide tube and a spring component. The wear-resistant sac is fixedly arranged on the groove wall of the limiting slot, the groove top wall of the limiting deep groove is vertically connected with the sac-shaped column, and the bottom end of the sac-shaped column is connected to the movable plug block, the sac-shaped column is connected to multiple wear-resistant sacs through the air guide tube, and the spring component is vertically arranged in the sac-shaped column, and its two ends are connected to the upper and lower ends of the sac-shaped column.

[0012] Furthermore, 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, and a guide sleeve slidably sleeved with the guide rod is fixed to the rear end of the positioning clamping plate.

[0013] The present invention has the following beneficial effects: 1. The present invention installs at least three groups of mutually symmetrical positioning blocks on the corresponding wall surfaces of the positioning base plate and the upper positioning clamping plate. The three groups of sliding adjustment mechanisms work to push the symmetrical positioning blocks closer to each other so that the distance between the two is 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, and then the arc-shaped positioning surfaces of the four positioning blocks that are symmetrical up and down and left and right will form a circular ring shape to clamp and fix the flange at the three valve ports of the valve. Not only can the valve to be processed be effectively clamped and fixed, but also the valve to be processed can be clamped and positioned, preventing the valve clamped on the machine tool from being skewed due to the uneven end faces of the three valve ports, which easily affects the accuracy of subsequent processing, and will not affect the grinding head of the machine tool to grind the inside of the three valve ports and the tool to drill holes on the three flanges of the valve.

[0014] 2. The present invention arranges a sliding positioning block in a deep sliding groove formed on the lower surface of the positioning block. Since the sleeve hole is in a blind hole state, a downward thrust is generated on the sliding positioning rod to make it slide downward, and then the positioning block is driven to slide downward in the deep sliding groove through the top-pushing reset component. At this time, the positioning block sliding downward will drive multiple limit blocks to slide downward and be inserted into the aligned multiple limit slots, and the positioning block continues to be located in the deep sliding groove. Then, the cooperation between the multiple limit blocks and the multiple limit slots can play a role of horizontal limit blocking for the symmetrical positioning blocks on the upper surface of the positioning base plate, thereby preventing the clamping force received by the flange of the valve from acting on the symmetrical positioning blocks below, which will cause the positioning blocks to slightly slip in the horizontal direction, thereby affecting the accuracy of the clamping and positioning of the valve.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure disclosed in the present invention; Figure 2 It is a schematic diagram of the back structure of the positioning device disclosed in the present invention; Figure 3 It is a structural schematic diagram of three groups of symmetrical positioning blocks on the positioning base plate disclosed in the present invention; Figure 4 It is a cross-sectional view of the positioning block disclosed in the present invention; Figure 5 The present invention discloses Figure 4 A partial enlarged view of the middle part; Figure 6 The present invention discloses Figure 4 A partial enlarged view of point B in the middle.

[0018] In the figure: 1. base; 11. limit jack; 2. Positioning base plate; 21. Sliding guide groove; 22. Limiting slot; 3. Hydraulic cylinder; 4. Positioning splint; 5. Positioning block; 51. Sliding deep groove; 6. Sliding adjustment mechanism; 61. Guide slider; 62. Screw slider; 63. Intermediate support block; 64. End support block; 641. Limiting deep groove; 65. Double-rotation screw; 66. Sleeve rod; 67. Positioning rod; 68. Positioning block; 681. Square hole; 69. Limiting plug block; 7. Push-reset assembly; 71. Push-block; 72. Vertical support block; 73. Reset spring; 74. Suspension spring; 8. Push-insertion assembly; 81. Mobile insert block; 82. Wear-resistant capsule; 83. Capsule-shaped column; 84. Air guide tube; 85. Spring member; 9. Guide rod; 91. Guide sleeve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating 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 should not be understood as limiting the present invention.

[0021] See also Figure 1-Figure 6 As shown, the present invention is a petroleum pipeline valve processing and positioning device, comprising a base 1, which can be detachably mounted on a workbench of a machine tool, a positioning base plate 2 is rotatably mounted on the upper surface of the base 1, a positioning clamping plate 4 is suspended and supported by a hydraulic cylinder 3 directly above the positioning base plate 2, three groups of symmetrical positioning blocks 5 are 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 are the same as the positions of the flanges of the pipeline valves to be processed, the symmetrical surfaces of the symmetrical positioning blocks 5 form arc-shaped positioning surfaces, and the arc-shaped positioning surfaces of the symmetrical positioning blocks 5 are in close contact with the outer ring surface of the flange of the pipeline valves to be processed, the positioning base plate 2 and the positioning clamping plate 4 are both mounted with three groups of sliding adjustment mechanisms 6, and each group of the sliding adjustment mechanisms 6 is used to slide and adjust the distance between each group of symmetrical positioning blocks 5; Specifically, the present invention is detachably mounted on the workbench of the machine tool by adding a base 1, and at least three groups of mutually symmetrical positioning blocks 5 are installed on the corresponding wall surfaces of the positioning base plate 2 and the upper positioning clamping plate 4. When the cast blank valve needs to be clamped and positioned, the piston rod of the hydraulic cylinder 3 is controlled to extend so that it pushes the positioning clamping plate 4 to rise vertically, and then the three groups of sliding adjustment mechanisms 6 on the lower surface of the positioning base plate 2 are operated to respectively push the symmetrical positioning blocks 5 to approach each other so that the distance between the two is similar to the size of the flange of the valve to be clamped and positioned, and then the valve to be processed is placed on the positioning base plate 2, and the flanges at the three valve ports are fitted and contacted with the arc positioning surfaces of the three groups of symmetrical positioning blocks 5, and then the piston rod of the hydraulic cylinder 3 is controlled to be retracted so that it drives the three groups of symmetrical positioning blocks 5 adjusted on the lower surface of the positioning clamping plate 4 to synchronously descend and fit on the flanges at the three valve ports, and then the arc positioning surfaces of the four positioning blocks 5 symmetrical up and down and left and right will surround a circular ring shape and clamp and fix to the flanges at the three valve ports of the valve. It can not only achieve effective clamping and fixing of the valve to be processed, but also play a role in clamping and positioning the valve to be processed, so as to prevent the valve clamped on the machine tool from being skewed due to the uneven end faces of the three valve ports, which can easily 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 drive 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 rotated to the corresponding tool positions in turn, so as to achieve precise processing of the three valve ports of the valve in turn, without the need for manual disassembly and adjustment of the valve port angle for re-clamping and positioning processing; 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 of the valve, and then the processed valve is removed from the multiple groups of symmetrical positioning blocks 5 above the positioning base plate 2 for storage, and then the valve to be processed is further clamped on the positioning device for subsequent processing.

[0022] In this embodiment, the sliding adjustment mechanism 6 includes 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, and each sliding guide groove 21 corresponds to the symmetrical positioning block 5. The width of the sliding guide groove 21 is less than the thickness of the positioning block 5. A guide slider 61 is slidably arranged in each sliding guide groove 21, and 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 symmetrical screw sliders 62 slide and fit to the positioning block 5. On the back of the positioning base plate 2 and the positioning clamping plate 4, an intermediate support block 63 is arranged between the symmetrical lead screw sliders 62, and the intermediate support block 63 is fixed to the middle position of the sliding guide groove 21, and 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, and a double-rotation lead 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 lead screw 65 through a lead screw nut, and 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 lead screw 65; Specifically, the servo motor fixed on the outer side of the end support block 64 drives the double-rotation lead screw 65 to rotate, so that it drives the symmetrical lead screw sliders 62 to slide synchronously toward or away from each other through the lead screw nut, and then the guide slider 61 slides in the sliding guide groove 21, so that it drives the symmetrical positioning blocks 5 to move toward or away from each other, so that the distance between them can be adjusted, thereby increasing the accuracy and stability of the flange clamping positioning of the valve; and because 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 upper positioning clamping plate 4 are The clamping force of the valve will only act on the positioning base plate 2 through the positioning block 5, and will not be transmitted to the double-rotation screw 65 through the guide slider 61. Therefore, it will not cause damage to the double-rotation screw 65 that is used for a long time. The cooperation of the symmetrical end support blocks 64 and the middle support blocks 63 can limit the sliding screw slider 62 and prevent the symmetrical 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 to prevent dust or processed iron filings from falling in.

[0023] In this embodiment, 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, and the positioning rod 67 is slidably inserted into the sleeve rod 66; Specifically, when the upper symmetrical positioning block 5 descends and fits against the upper outer ring surface of the valve flange, the symmetrical sleeve rod 66 on the lower surface of the positioning block 5 will slowly sleeve onto the vertically arranged positioning rod 67 on the upper surface of the lower positioning block 5, so that the cooperation between the sleeve rod 66 and the positioning rod 67 can play a positioning and guiding role for the upper and lower positioning blocks 5, preventing the upper positioning block 5 from being slightly misaligned with the lower positioning block 5 when the arc-shaped positioning surface of the upper positioning block 5 descends and fits against the valve flange, thereby affecting the precise and stable clamping and positioning processing of the valve flange by the arc-shaped positioning surfaces of the four positioning blocks 5 forming a circular ring.

[0024] In this embodiment, a sliding deep groove 51 is provided on the lower surface of the positioning block 5 located at the bottom, and the sliding deep groove 51 is staggered with the connected guide slider 61, a positioning block 68 is slidably provided in the sliding deep groove 51, and a plurality of limit plugs 69 are installed on the lower surface of the positioning block 68, and a plurality of limit slots 22 are equidistantly provided on the groove walls on both sides of the sliding guide groove 21 along its length direction, and a plurality of limit plugs 69 are slidably inserted into the aligned plurality of limit slots 22, and a sleeve hole is provided upwardly at the bottom end of the sleeve rod 66, and the sleeve hole is sleeved on the positioning rod 67, and the bottom end of the positioning rod 67 is slidably inserted into the sliding deep groove 51, and the bottom end of the positioning rod 67 is connected to the positioning block 68 through the push reset assembly 7; Specifically, when the upper symmetrical positioning block 5 descends and fits the outer ring surface of the flange, the clamping force on the flange will be transmitted to the lower symmetrical positioning block 5, thereby generating a horizontal thrust on the lower positioning block 5, and then acting on the double-rotation screw 65 through the guide slider 61, which may easily cause damage to the thread teeth of the double-rotation screw 65; therefore, when the upper symmetrical positioning block 5 descends, the sleeve hole on the sleeve rod 66 will be sleeved on the positioning rod 67. Since the sleeve hole is a blind hole, it will generate a downward thrust on the sliding positioning rod 67 to make it slide downward, and then drive the positioning block 68 to slide downward in the sliding deep groove 51 through the push-reset assembly 7. At this time, the downward sliding positioning block 68 will drive multiple limit plugs 69 to slide downward and insert into the aligned multiple limit slots 22. At this time, The positioning block 68 continues to be located in the sliding deep groove 51, and then the cooperation of multiple limit blocks 69 and multiple limit slots 22 can play a role of horizontal limit blocking for the symmetrical positioning blocks 5 on the upper surface of the positioning base plate 2, preventing the clamping force received by the valve flange from acting on the symmetrical positioning blocks 5 below, causing the positioning blocks 5 to produce a slight horizontal slip phenomenon, thereby affecting the accuracy of the clamping positioning of the valve; and when the upper positioning block 5 is detached from the flange, the sleeve rod 66 is detached from the positioning rod 67, and the push-reset assembly 7 will drive the positioning block 68 to slide upward in the sliding deep groove 51, and then drive the multiple limit blocks 69 to be retracted from the limit slots 22, so that the symmetrical positioning block 5 below can freely slide and adjust under the drive of the double-rotation screw 65.

[0025] In this embodiment, the push-reset assembly 7 includes a push block 71, a vertical support block 72, a reset spring 73 and a suspension spring 74. The plurality of limit plugs 69 are slidably inserted into the square hole 681 opened on the positioning block 68, and the upper opening of the square hole 681 is a countersunk square hole, and the countersunk square hole is in sliding contact with the support frame formed by the outer ring surface of the top end of the limit plug 69, and the bottom end of the positioning rod 67 inserted into the sliding deep groove 51 is connected to the push block 7. 1, and 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, the vertical support blocks 72 are staggered with the sliding limit plug 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, and the top end of the limit plug 69 is connected to the lower surface of the pushing block 71 through a suspension spring 74; Specifically, when the positioning rod 67 slides in the sliding groove 51, the pushing block 71 will be pushed to slide downward in the sliding groove 51, and the suspension spring 74 will be stretched. Since the pushing block 71 and the positioning block 68 are connected by the vertical support block 72, the limiting plug 69 on the positioning block 68 will be pushed to slide downward and inserted into the limiting plug hole 11. If one of the limiting plugs 69 is not aligned with the corresponding limiting slot 22, the positioning block 68 will slide down in the sliding groove 51, causing the unaligned limiting plug 69 to produce a relative upward movement in the square hole 681. At this time, the return spring 73 on the top of the relatively sliding limiting plug 69 will be compressed, so that the positioning block 68 will not be pressed down when it slides down. The interference of the unaligned limit blocks 69 makes it impossible to drive the other limit blocks 69 to be normally inserted into the limit slots 22, which will affect the cooperation between the multiple limit blocks 69 and the limit slots 22, and the horizontal sliding limit blocking effect on the symmetrical positioning blocks 5; and when the sleeve rod 66 is detached from the positioning rod 67, the elastic restoring force of the suspension spring 74 will pull the push block 71 to slide upward in the sliding deep groove 51, and then the positioning block 68 will slide upward synchronously, and at this time the elastic restoring force of the compressed return spring 73 will push one of the limit blocks 69 to slide downward, making it flush with the bottom of the other limit blocks 69, thereby facilitating the multiple limit blocks 69 to slide to the next point and plug into and correspond to the multiple limit slots 22.

[0026] In this embodiment, 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, and at least three groups of symmetrical limit plug holes 11 are provided on the upper surface of the base 1, and each group of symmetrical limit plug holes 11 corresponds to the symmetrical end support block 64, and 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, and 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; 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.

[0027] 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. Specifically, when the plurality of limit plugs 69 slide downward and are inserted into the limit slots 22, the limit plugs 69 will squeeze the wear-resistant capsule 82, so that the wear-resistant capsule 82 can not only increase the friction between the limit plugs 69 and improve the stability of its insertion, but also the gas in the wear-resistant capsule 82 will enter the capsule-shaped column 83 through the air guide tube 84, so that the capsule-shaped column 83 will expand vertically in the limit deep groove 641, and at this time the spring member 85 will be stretched, and then the expansion of the capsule-shaped column 83 will push the movable plug 81 to slide downward and insert into the limit plug hole 11, thereby realizing the pushing and sliding of the movable plug 81; when the upper positioning block 5 drives the sleeve rod 66 to rise slowly, and the sleeve rod 66 will not completely detach from the positioning rod 67, at this time the positioning rod 67 will rise slowly in the sliding deep groove 51, so that the positioning block 68 will drive the limit plug 69 to detach upward from the limit slot 22 When the spring 85 is released from the locking chute 11, the elastic restoring force of the spring 85 in the bag-shaped column 83 drives it to contract, so that the movable plug 81 is retracted from the limiting socket 11, and the gas in the bag-shaped column 83 enters the wear-resistant bag 82 through the air guide tube 84, so that the movable plug 81 is quickly withdrawn from the limiting socket 11, so as to facilitate the rotation of the positioning base plate 2 on the upper surface of the base 1. Since the symmetrical positioning blocks 5 are released from the limiting position, and the upper and lower groups of symmetrical positioning blocks 5 are connected to each other through the sleeve rod 66 and the positioning rod 67, the upper and lower symmetrical double-rotation screw 65 can be driven to work, so that the upper and lower symmetrical positioning blocks 5 can be fine-tuned synchronously, and the valve after rotation adjustment can be clamped and fixed again, so that the valve mouth of the valve after rotation adjustment can be more accurately aligned with the tool on the machine tool for processing.

[0028] 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, and the rear end of the positioning clamping plate 4 is fixed with a guide sleeve 91 that is slidably connected to the guide rod 9; specifically, the cooperation between the guide rod 9 and the guide sleeve 91 can play a role of vertical guidance for the positioning clamping plate 4 that slides up and down, thereby preventing the positioning clamping plate 4 from tilting when it is raised or lowered.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] 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 implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only 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). The positioning base plate (2) and the positioning clamping plate (4) are each provided with three sliding guide grooves (21), and 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). A guide slider (61) is slidably arranged in each sliding guide groove (21), and 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 symmetrical screw sliders (62) slide and fit to the positioning block (5). An intermediate support block (63) is arranged between the symmetrical lead screw sliders (62) on the back of the positioning base plate (2) and the positioning clamp plate (4), and the intermediate support block (63) is fixed to the middle position of the sliding guide groove (21). End support blocks (64) are fixed to the two ends of the sliding guide groove (21), and the end support blocks (64) are located on the outside of the lead screw slider (62). A double-rotation lead 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 lead screw (65) through a lead screw nut, and 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 lead screw (65).

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) and the connected guide sliding block (61) are staggered, 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), and the groove walls on both sides of the sliding guide groove (21) are provided with a plurality of limit slots (22) equidistantly along its length direction, and the plurality of limit plugs (69) are slidably inserted into the aligned plurality of limit slots (22), and the bottom end of the sleeve rod (66) is provided with a sleeve hole upwardly, and the sleeve hole is sleeved on the positioning rod (67), and the bottom end of the positioning rod (67) is slidably 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: 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 a 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).

6. The oil pipeline valve processing and positioning device according to claim 5, characterized in that: 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).

7. 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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