Pressure vessel end socket trepanning positioning mechanism

Abstract

The utility model relates to the technical field of pressure vessel end socket machining, in particular to a pressure vessel end socket trepanning positioning mechanism which comprises a drilling table, a moving frame arranged at the top of the drilling table and a feeding part used for driving the moving frame to move linearly. The pressure vessel end socket trepanning and positioning mechanism further comprises four end socket positioning parts which are evenly arranged on the top of the drilling table in the circumferential direction, and the end socket positioning parts are used for positioning and clamping end sockets in symmetrical regular shapes. According to the size of an end socket of a round welding face end face or an oval welding end face to be drilled, the limiting pieces in the four directions can be rapidly inserted into the inserting grooves close to the outer boundary of the end socket, then the driving piece is controlled to drive the four moving strips to be synchronously gathered together, the end socket can be pushed to the center of the top of the drilling table to move, and drilling is completed. The clamp can be suitable for end sockets with circular and oval welding end faces of different sizes, and the efficiency of positioning, clamping and fixing operation of the end sockets can be improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel head processing technology, and in particular to a pressure vessel head opening positioning mechanism. Background Technology

[0002] Pressure vessels are sealed devices used to hold gases or liquids and withstand a certain pressure. The top and bottom of a pressure vessel are typically welded with heads for sealing. Different sizes of holes are cut into the heads depending on the application, and the shapes of the heads are mostly symmetrical and regular.

[0003] Since the welded end face between the head and the pressure vessel can be circular or elliptical, and the two shapes have significant dimensional differences, the existing pressure vessel head opening and positioning mechanism needs to select the corresponding opening and positioning mechanism according to the shape of the head welded end face before opening the hole. It is difficult to simultaneously apply the head positioning to both circular and elliptical welded end faces. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a pressure vessel head opening positioning mechanism to solve the problem of head positioning that is difficult to apply simultaneously to both circular and elliptical welding end faces.

[0005] To achieve the above objectives, this utility model provides a pressure vessel head opening and positioning mechanism, including a drilling platform and a movable frame disposed on the top of the drilling platform, a feed unit for driving the movable frame to move linearly, and the pressure vessel head opening and positioning mechanism further includes:

[0006] Four end cap positioning parts are evenly distributed circumferentially on the top of the drilling platform. The end cap positioning parts are used to position and clamp symmetrical and regularly shaped end caps.

[0007] A drive unit for driving the four head positioning parts to converge towards the center point of the drill table.

[0008] The head positioning part includes:

[0009] A guide groove is provided on the top of the drilling platform.

[0010] A sliding bar is provided within the guide groove.

[0011] Several slots are arranged side by side on the top of the moving bar.

[0012] A limiting member is provided in one of the slots, the limiting member being used to push and limit the end cap boundary.

[0013] Preferably, the limiting member includes:

[0014] A plug-in block that is inserted into one of the slots.

[0015] A support block is fixedly installed on the top of the insert block.

[0016] The slider end is slidably connected to the groove located on the top of the support block.

[0017] A guide rod is fixed inside the groove, and the slider is slidably sleeved outside the guide rod.

[0018] A V-shaped stop is fixedly installed on the top of the slider.

[0019] A spring that is slidably sleeved on one end of the guide rod.

[0020] Preferably, the spring is located between one of the vertical surfaces of the slider and the groove, and the two ends of the spring are respectively fixed on the slider and the inner wall of the groove.

[0021] Preferably, the V-shaped concave surface on the V-shaped stop and the axial direction of the guide rod are both oriented toward the midpoint of the top of the drilling platform, and the V-shaped stop is located on top of the support block.

[0022] Preferably, the driving unit includes a transmission groove located at the midpoint of the top of the drilling platform. A first lead screw is rotatably connected between the transmission groove and the four guide grooves. A bevel gear is fixedly provided at one adjacent end of each of the two first lead screws. A helical gear is rotatably provided inside the transmission groove. The tooth surfaces of the helical gears mesh with the tooth surfaces of the four bevel gears respectively. A moving bar is threaded around the outside of the first lead screw and is used to drive a drive motor to rotate the helical gear.

[0023] Preferably, the pressure vessel head opening positioning mechanism further includes a sliding seat located on the top of the moving frame, an adjustment part for driving the sliding seat to move laterally in a straight line, and a drilling lift on the sliding seat for drilling holes in the head.

[0024] Preferably, the feed section includes two transverse grooves disposed opposite to each other on the top of the drilling table, one of which is fixedly provided with a slide rod, and the other is rotatably provided with a second lead screw. One of the legs of the bottom of the moving frame is slidably sleeved on the slide rod, and the other leg of the bottom of the moving frame is threadedly sleeved on the second lead screw. A first servo motor is used to drive the second lead screw to rotate.

[0025] Preferably, the structure of the adjusting part is the same as the structure of the feeding part.

[0026] The beneficial effects of this utility model are:

[0027] This utility model utilizes a combination of limiting components at four locations, moving strips, and several slots arranged side-by-side on the moving strips. Depending on the size of the end cap with a circular or elliptical welding face to be drilled, the limiting components at the four locations can be inserted into the slots near the outer boundary of the end cap. Then, the driving component is operated to drive the four moving strips to converge synchronously, which can push the end cap towards the center of the top of the drilling platform. This makes it applicable to end caps with different sizes of circular and elliptical welding faces, and improves the efficiency of end cap positioning and clamping operations. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0030] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0031] Figure 3 This is a partial top view of the present invention;

[0032] Figure 4 This is a three-dimensional illustration of the present invention. Figure 3 .

[0033] The diagram is marked as follows:

[0034] 1. Drilling table; 2. Head positioning part; 21. Guide groove; 22. Moving bar; 23. Slot; 24. Limiting element; 241. Support block; 242. Slide groove; 243. Slider; 244. V-shaped stop; 245. Guide rod; 246. Spring; 247. Insert block; 3. Moving frame; 4. Feeding part; 5. Sliding seat; 6. Adjusting part; 7. Drilling hoist; 8. Drive part. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] like Figures 1 to 3 As shown, a pressure vessel head opening and positioning mechanism includes a drilling platform 1 and a movable frame 3 disposed on the top of the drilling platform 1. Several support rollers are arranged side-by-side on the top of the drilling platform 1 to greatly reduce the resistance to pushing the head during head positioning and calibration. A feed section 4 is used to drive the movable frame 3 to move linearly. The pressure vessel head opening and positioning mechanism also includes:

[0038] Four end cap positioning parts 2 are evenly distributed on the top of the drilling platform 1 in a circumferential direction. The end cap positioning parts 2 are used to position and clamp symmetrical and regularly shaped end caps.

[0039] A drive unit 8 is used to drive the four end cap positioning parts 2 to converge at the midpoint of the drilling platform 1.

[0040] The head positioning part 2 includes:

[0041] Guide groove 21 is provided on the top of drilling platform 1.

[0042] The sliding bar 22 is slidably disposed in the guide groove 21.

[0043] Several slots 23 are arranged side by side at the top of the moving bar 22.

[0044] A limiting member 24 is provided in one of the slots 23, which is used to push and limit the boundary of the end cap.

[0045] This design allows for fine-tuning of the head's position via the limiting component 24 during the later stages of positioning the circular or elliptical welded end face, aligning its vertical axis with the midpoint of the drilling platform 1. Simultaneously, it can clamp and fix the head, improving its stability during drilling.

[0046] like Figure 3 and Figure 4 As shown, the limiting member 24 includes:

[0047] Insert 247 is inserted into one of the slots 23.

[0048] A support block 241 is fixedly installed on the top of the insertion block 247.

[0049] The end of the slider 243 is slidably connected to the groove 242 located on the top of the support block 241.

[0050] A guide rod 245 is fixed inside the slide groove 242, and a slider 243 is slidably sleeved on the outside of the guide rod 245.

[0051] A V-shaped stop 244 is fixedly installed on the top of the slider 243.

[0052] A spring 246 is slidably sleeved on one end of the guide rod 245.

[0053] Spring 246 is located between one of the vertical surfaces of slider 243 and groove 242, and the two ends of spring 246 are fixed on slider 243 and inner wall of groove 242, respectively.

[0054] The V-shaped concave surface on the V-shaped stop 244 and the axial direction of the guide rod 245 are both towards the midpoint of the top of the drilling platform 1, and the V-shaped stop 244 is located on top of the support block 241.

[0055] With this design, the V-shaped stop 244 can be set with a certain displacement allowance on the support block 241 by the spring 246, so as to make up for the error value between the slot 23 closest to the end cap and the end cap when the drive unit 8 drives the end cap positioning unit 2 to move the end cap a small distance for positioning, thereby improving the positioning accuracy of the end cap on the elliptical welding end face.

[0056] like Figure 1 As shown, the drive unit 8 includes a transmission groove located at the midpoint of the top of the drilling platform 1. A first lead screw is rotatably mounted between the transmission groove and four guide grooves 21. A bevel gear is fixed to one adjacent end of each of the two first lead screws. A helical gear is rotatably mounted inside the transmission groove, with the tooth surfaces of the helical gears meshing with the tooth surfaces of the four bevel gears. A moving bar is threaded onto the outside of the first lead screw. A drive motor for driving the helical gears rotates, through the cooperation between the drive unit 8 and the limiting member 24, allows for a small difference in the distance between the four limiting members 24 and the end cap when the limiting member 24 is placed in the slot 23 on the moving bar 22 closest to the outer boundary of the end cap. This difference can be compensated by the allowance of the spring 246, improving the positioning accuracy of the end cap.

[0057] like Figure 1As shown, the pressure vessel head opening and positioning mechanism also includes a sliding seat 5 located on the top of the moving frame 3, an adjusting part 6 for driving the sliding seat 5 to move laterally in a straight line, a drilling lift 7 on the sliding seat 5, the drilling lift 7 for drilling holes in the head, the drilling lift 7 including a support frame fixedly located on the top of the sliding seat 5, a transmission gear rotatably provided between the top of the support frame and the top of the sliding seat 5, a vertical screw threaded between the support frame and the sliding seat 5, the vertical screw threadedly connected to the threaded hole on the transmission gear, a vertical guide rod vertically inserted on the sliding seat 5, a drilling machine fixedly located at the bottom of the vertical guide rod, the bottom end of the vertical screw rotatably located on the drilling machine, a spur gear rotatably provided between the top of the support frame and the top of the sliding seat 5, the tooth surface of the spur gear meshing with the tooth surface of the transmission gear, a second servo motor for driving the spur gear to rotate, thus driving the drilling machine to move vertically up and down, so as to drill holes at different heights on the head.

[0058] The feed unit 4 includes two horizontal slots located opposite each other on the top of the drilling table 1. A slide rod is fixedly installed in one of the horizontal slots, and a second lead screw is rotatably installed in the other horizontal slot. One of the legs of the bottom of the moving frame 3 is slidably sleeved on the slide rod, and the other leg of the bottom of the moving frame 3 is threadedly sleeved on the second lead screw. A first servo motor is used to drive the second lead screw to rotate.

[0059] The structure of the adjustment unit 6 is the same as that of the feed unit 4. This design allows for precise adjustment of the coordinates of the drilling machine in three-dimensional space, enabling it to drill holes at different three-dimensional points on the surface of the end cap.

[0060] Working principle: The initial position of the four moving bars 22 is located at one end of the guide groove 21 away from the midpoint of the top of the drilling table 1, and the limiting member 24 is inserted into the slot 23 at the top of the moving bar 22 away from the midpoint of the drilling table 1. The initial position of the moving frame 3 is located at one of the boundaries of the top of the drilling table 1, so as to facilitate the use of the gantry to transfer the end cap with a circular or elliptical welding end face to the midpoint of the top of the drilling table 1. Due to the relatively poor stability of the gantry transport, there will be a certain error in the position of the end cap. Then, the user inserts the limiting member 24 into the slot 23 on the moving bar 22 closest to the outer boundary of the end cap. Then, the driving unit 8 simultaneously drives the four moving bars 22 and the limiting member 24 to converge towards the midpoint of the drilling table 1, pushing the end cap and aligning its vertical axis with the midpoint of the drilling table 1. After the concave surfaces of the V-shaped stops 244 in the four limiting members 24 all abut against the outer boundary of the end cap, the driving unit 8 holds The moving bar 22 continues to move, while the V-shaped stop 244 remains stationary. The insert block 247, support block 241, and guide rod 245 are simultaneously moved by the moving bar 22, causing the slider 243 to compress the spring 246 and shorten it until the vertical axis of the end cap corresponds to the midpoint of the drilling table 1. Then, the drive unit 8 stops. This completes the positioning and clamping of the end cap. Furthermore, the spring 246 eliminates the distance deviation between the limiting member 24 and the end cap before they come into contact during end cap positioning, enabling the positioning and fixing of end caps with circular or elliptical welded end faces of different sizes. After the end cap is positioned, the feed unit 4 drives the moving frame 3 to move linearly, bringing it closer to the drilling point of the end cap. Once the drilling machine is above the drilling point, the adjustment unit 6 drives the sliding seat 5 to move until the output end of the drilling machine is aligned with the drilling point on the end cap. Finally, the drilling lift 7 drives the drilling machine to approach and drill the end cap, improving the drilling accuracy of the end cap.

[0061] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0062] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure vessel head opening and positioning mechanism, comprising a drilling platform (1) and a movable frame (3) disposed on the top of the drilling platform (1), and a feed part (4) for driving the movable frame (3) to move linearly, characterized in that, The pressure vessel head opening positioning mechanism further includes: Four end cap positioning parts (2) are evenly arranged on the top of the drilling platform (1) in a circumferential direction. The end cap positioning parts (2) are used to position and clamp symmetrical and regular-shaped end caps. A drive unit (8) for driving the four head positioning parts (2) to converge at the midpoint of the drilling platform (1); The head positioning part (2) includes: A guide groove (21) is provided on the top of the drilling platform (1); A sliding strip (22) is provided in the guide groove (21); A plurality of slots (23) are arranged side by side on the top of the moving bar (22); A limiting member (24) is provided in one of the slots (23), the limiting member (24) being used to push and limit the end cap boundary.

2. The pressure vessel head opening positioning mechanism according to claim 1, characterized in that, The limiting member (24) includes: A plug (247) is inserted into one of the slots (23); A support block (241) is fixedly disposed on the top of the insert (247); The end of the slider (243) is slidably connected to the groove (242) located on the top of the support block (241); A guide rod (245) is fixed inside the slide groove (242), and a slider (243) is slidably sleeved on the outside of the guide rod (245); A V-shaped stop (244) is fixedly installed on the top of the slider (243); A spring (246) is slidably sleeved on one end of the guide rod (245).

3. The pressure vessel head opening positioning mechanism according to claim 2, characterized in that, The spring (246) is located between one of the vertical surfaces of the slider (243) and the groove (242), and the two ends of the spring (246) are respectively fixed on the slider (243) and the inner wall of the groove (242).

4. The pressure vessel head opening positioning mechanism according to claim 3, characterized in that, The V-shaped concave surface on the V-shaped stop (244) and the axial direction of the guide rod (245) are both toward the midpoint of the top of the drilling platform (1), and the V-shaped stop (244) is located on top of the support block (241).

5. The pressure vessel head opening positioning mechanism according to claim 4, characterized in that, The drive unit (8) includes a transmission groove located at the midpoint of the top of the drilling platform (1). The transmission groove is rotatably connected to the four guide grooves (21). A bevel gear is fixed at one end of each of the two first lead screws. A helical gear is rotatably connected inside the transmission groove. The tooth surfaces of the helical gears mesh with the tooth surfaces of the four bevel gears. The moving bar (22) is threaded onto the outside of the first lead screw and is a drive motor for driving the rotation of the helical gear.

6. The pressure vessel head opening positioning mechanism according to claim 1, characterized in that, The pressure vessel head opening positioning mechanism also includes a sliding seat (5) located on the top of the moving frame (3), an adjustment part (6) for driving the sliding seat (5) to move laterally in a straight line, and a drilling lift (7) provided on the sliding seat (5) for drilling holes in the head.

7. The pressure vessel head opening positioning mechanism according to claim 6, characterized in that, The feed unit (4) includes two horizontal slots located opposite each other on the top of the drilling table (1). A slide rod is fixedly installed in one of the horizontal slots, and a second lead screw is rotatably installed in the other horizontal slot. One of the legs of the bottom of the moving frame (3) is slidably sleeved on the slide rod, and the other leg of the bottom of the moving frame (3) is threadedly sleeved on the second lead screw. A first servo motor is used to drive the second lead screw to rotate.

8. The pressure vessel head opening positioning mechanism according to claim 7, characterized in that, The structure of the adjustment unit (6) is the same as that of the feed unit (4).

Images