A device for measuring the internal diameter of a tuyere bushing

Abstract

The utility model relates to blast furnace tuyere middle sleeve manufacturing technical field discloses a kind of tuyere middle sleeve inner diameter measuring equipment, including holding lever, and the one end of holding lever is fixedly provided with locating disc on fixed camber, double-end telescopic measuring mechanism is located at the one end of holding lever away from locating disc, and double-end telescopic measuring mechanism includes connecting rod, sleeve seat, measuring head and telescopic damper bar, sleeve seat array is equipped with four groups, four groups of sleeve seat are respectively hinged through different connecting rods, and measuring head is fixedly installed on one sleeve seat, telescopic damper bar penetrates and connects two opposite sleeve seats, after measuring mechanism is in-depth tuyere middle sleeve interior, measuring head is always next to tuyere middle sleeve inner wall under the elastic action of compression spring, telescopic spring, and measuring head can synchronous adjustment position by connecting rod linkage, it is carried out full coverage detection to tuyere middle sleeve inner diameter in the process of rotary telescopic, avoid the measurement omission caused by detection dead angle, ensure that measurement data can comprehensively reflect the actual situation of tuyere middle sleeve inner diameter.

Description

Technical Field

[0001] This utility model belongs to the field of blast furnace tuyere sleeve manufacturing technology, specifically, it relates to a tuyere sleeve inner diameter measuring device. Background Technology

[0002] In industrial production, measuring the inner diameter of the air vent sleeve is crucial for ensuring equipment sealing and hydrodynamic performance.

[0003] The prior art discloses a device for measuring the inner diameter of an air vent sleeve (CN109554512B), including a control lever, a positioning rod perpendicularly connected to the front end of the control lever, a drive detection rod assembly disposed within the control lever and moving along the axis of the control lever, and a movable detection rod assembly disposed within the positioning rod; the drive detection rod assembly includes an extension rod, a pointer and a wrench disposed at the rear end of the extension rod, a first rack disposed at the front end of the extension rod, and a first spring sleeved on the extension rod and disposed in front of the wrench; the movable detection rod assembly includes a detection rod, a second rack and a second spring, the upper end of the second rack being connected to the lower end of the detection rod, and the lower end of the second rack being connected to the upper end of the second spring; a concentric gear set with different diameters is also provided between the front end of the control lever and the positioning rod, and the concentric gear set with different diameters meshes with the first rack and the second rack respectively.

[0004] Research revealed that existing technologies rely on manual adjustment of the handle end for fixation, which can easily lead to measurement center shift due to improper operation, affecting data accuracy. Furthermore, existing technologies can only adapt to localized detection in a single direction, and cannot perform large-scale circumferential detection of the inner diameter of the sleeve, resulting in blind spots in the detection and an inability to effectively measure localized deformation locations, thus causing errors.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: A device for measuring the inner diameter of an air vent sleeve, comprising: A grip, wherein a positioning disc is fixedly provided on a fixed curved surface at one end of the grip; A dual-head telescopic measuring mechanism is located at the end of the handle away from the positioning plate. The dual-head telescopic measuring mechanism includes a connecting rod, a sleeve, a measuring head, and a telescopic damping rod. The sleeve array is provided in four groups, and the four groups of sleeves are respectively hinged to each other by different connecting rods. The measuring head is fixedly installed on one of the sleeves, and the telescopic damping rod passes through and connects two opposite sleeves. A centering mechanism is located at one end of the grip rod near the positioning plate. The centering mechanism includes a clamping rod, a linkage rod, a sleeve, and a threaded ring. A clamping rod is hinged to each of the four sides of the sleeve. The linkage rod is hinged between the clamping rod and the sleeve. The threaded ring is movably disposed between the grip rod and the sleeve.

[0007] In a preferred embodiment of this utility model, the positioning disk has four sliding openings in an array, and a support rod slides in each of the sliding openings. The support rods are Z-shaped, and two linkage rods are symmetrically hinged between each set of support rods and the sleeve.

[0008] In a preferred embodiment of this utility model, the end of the grip rod near the positioning plate has an external thread, the sleeve has an L-shaped cross-section, and a threaded ring is rotatably provided at the end of the sleeve away from the positioning plate, the threaded ring being threaded into the external thread.

[0009] In a preferred embodiment of this utility model, a spline rod is provided inside the end of the grip rod near the positioning plate via a bearing. A threaded rod is sleeved on the spline rod, and a key hole is provided in the center of the threaded rod. The key hole is used to engage the spline rod, and the threaded rod is threadedly embedded in the grip rod.

[0010] In a preferred embodiment of the present invention, a centering shaft is fixedly provided at the end of the threaded rod away from the threaded ring. The centering shaft is shaped like a nail, and a center block is fixedly provided at the center of the centering shaft.

[0011] In a preferred embodiment of this utility model, a telescopic damping rod is embedded through the center of the central block, and a sleeve with a measuring head is fixedly installed at each end of the telescopic damping rod. The other two sleeves are slidably installed at both ends of the centering shaft.

[0012] In a preferred embodiment of this utility model, two of the sleeves are fixedly provided with telescopic springs between them and the center block, and two compression springs are sleeved on both ends of the telescopic damping rod. The center block is elastically connected to the sleeves at both ends of the telescopic damping rod through the telescopic springs on both sides. In addition, two other sleeves are fixedly provided with compression springs between them and the center block. The two compression springs are sleeved on both ends of the centering shaft, and the center block elastically cooperates with the sleeves at both ends of the centering shaft through the compression springs on both sides.

[0013] Compared with the prior art, the present invention has the following advantages: 1. This equipment features a centering mechanism. Four cross-shaped sliding joints restrict the clamping rods to slide radially. When the threaded ring is rotated, the sleeve drives the four clamping rods to slide synchronously via symmetrically arranged linkage rods. The force exerted by the four clamping rods on the inner wall of the air outlet sleeve is uniform and symmetrically distributed, which can quickly align the center of the equipment with the center of the air outlet sleeve. At the same time, the Z-shaped structure of the clamping rods increases the contact area with the inner wall, further improving the centering stability and preventing the equipment from shifting due to vibration or external force during measurement.

[0014] 2. This equipment features a dual-head telescopic measuring mechanism with four sets of sleeves arranged in a cross array and linked by connecting rods. When the measuring mechanism extends into the inner sleeve of the air vent, the measuring head remains close to the inner wall of the air vent sleeve under the elastic action of the compression and extension springs. Regardless of whether the inner diameter of the air vent sleeve is a regular circle or has local deformation, the measuring head can adjust its position synchronously through the linkage of the connecting rods. During the rotation and telescopic process, it achieves full coverage detection of the circumference of the inner diameter of the air vent sleeve, avoiding measurement omissions caused by blind spots and ensuring that the measurement data fully reflects the actual condition of the inner diameter of the air vent sleeve.

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the double-head telescopic measuring mechanism of this utility model; Figure 3 This is a schematic diagram of the rotating rod of this utility model; Figure 4 This is a disassembly diagram of the grip and centering mechanism of this utility model; Figure 5 This is a schematic diagram of the structural installation method of this utility model.

[0017] In the diagram: 10. Handle; 11. Positioning plate; 12. Clamping rod; 13. Sliding mouth; 14. Centering shaft; 15. Connecting rod; 16. Sleeve; 17. Center block; 18. Compression spring; 19. Telescopic spring; 21. Measuring head; 22. Telescopic damping rod; 23. Threaded rod; 24. Keyhole; 25. External thread; 26. Splined rod; 27. Linkage rod; 28. Sleeve; 29. ​​Threaded ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0019] A device for measuring the inner diameter of an air vent sleeve, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, including A grip 10 is provided with a positioning disc 11 fixedly mounted on a curved surface at one end of the grip 10. The double-head telescopic measuring mechanism is located at the end of the handle 10 away from the positioning plate 11. The double-head telescopic measuring mechanism includes a connecting rod 15, a sleeve 16, a measuring head 21, and a telescopic damping rod 22. The sleeve 16 is arranged in an array of four groups, and the four groups of sleeves 16 are hinged to each other by different connecting rods 15. The measuring head 21 is fixedly installed on one of the sleeves 16, and the telescopic damping rod 22 passes through and connects two opposite sleeves 16. The centering mechanism is located at one end of the grip 10 near the positioning plate 11. The centering mechanism includes a support rod 12, a linkage rod 27, a sleeve 28, and a threaded ring 29. A support rod 12 is hinged to each of the four sides of the sleeve 28. The linkage rod 27 is hinged between the support rod 12 and the sleeve 28. The threaded ring 29 is movably disposed between the grip 10 and the sleeve 28.

[0020] Specifically, the centering mechanism and the double-headed telescopic measuring mechanism are located at the two ends of the handle 10. The centering mechanism fixes the handle 10 and the double-headed telescopic measuring mechanism at the center of the air vent sleeve. The double-headed telescopic measuring mechanism is inside the air vent sleeve and performs a rotational telescopic measurement on the part of the air vent sleeve that needs to be measured in terms of inner diameter.

[0021] like Figure 1 and Figure 4 As shown, the positioning disk 11 has four sliding openings 13 arranged in a cross shape. Each sliding opening 13 corresponds to a sliding support rod 12. The support rod 12 is shaped like a Z. The four support rods 12 are provided with lining plates on the inside of the side of the sleeve 28 near the outer curved surface and on the four sides of the outer curved surface of the sleeve 28. The two ends of the lining plates are provided with hinge holes. The support rod 12 is hinged to the lining plate on the sleeve 28 through its own lining plate and two linkage rods 27. Each set of support rods 12 is symmetrically hinged to the sleeve 28 with two linkage rods 27. The linkage rod 27 is shaped like a frame structure with pins at both ends. The linkage rod 27 is hinged to the lining plate through the pins at both ends. Wear-resistant rubber pads are pasted inside the contact ends of the hinges at both ends of the linkage rod 27 to improve centering stability and wear resistance. like Figure 4As shown, the positioning disk 11 is located off-center from the center of the grip 10. The curved surface of the grip 10 near the positioning disk 11 has an external thread 25. The cross-sectional shape of the sleeve 28 is similar to an L shape. The end of the sleeve 28 away from the positioning disk 11 is fitted with a threaded ring 29 through a bearing. The internal thread of the threaded ring 29 is threadedly engaged with the external thread 25 on the grip 10.

[0022] Specifically, when the operator rotates the threaded ring 29, due to the threaded engagement between the threaded ring 29 and the external thread 25 of the handle 10, the threaded ring 29 will move axially towards the positioning plate 11 along the handle 10. During the movement of the threaded ring 29, it will push the sleeve 28 to move synchronously. The sleeve 28 will drive the linkage rod 27 hinged to its side wall to move. The linkage rod 27 will pull the support rod 12 to slide radially outward within the slide opening 13 of the positioning plate 11 until the end of the support rod 12 is in close contact with the inner wall of the air vent sleeve, thus achieving the centering and fixing of the equipment. Conversely, when the threaded ring 29 is rotated in the opposite direction, the threaded ring 29 moves away from the positioning plate 11 along the axial direction of the handle 10. The sleeve 28 moves with the threaded ring 29, and the linkage rod 27 pushes the support rod 12 to slide radially inward within the slide opening 13, thus releasing the centering state.

[0023] like Figure 1 , Figure 3 and Figure 5 As shown, a splined rod 26 is rotatably mounted on the end of the grip 10 near the positioning plate 11 via a bearing. One end of the splined rod 26 has a rotating handle, and a threaded rod 23 is fitted onto the splined rod 26. A keyhole 24 is opened in the center of the threaded rod 23, which is engaged with the splined rod 26. The size of the keyhole 24 matches the splined rod 26 to ensure that the splined rod 26 can drive the threaded rod 23 to rotate synchronously. At the same time, the threaded rod 23 can slide along the axial direction of the splined rod 26. An internal thread is opened inside the grip 10, and the threaded rod 23 is threadedly embedded in the grip 10. like Figure 1 , Figure 2 and Figure 3 As shown, a centering shaft 14 is fixedly provided at one end of the threaded rod 23 away from the threaded ring 29. The centering shaft 14 is connected to the threaded rod 23 by a square plate. The centering shaft 14 is shaped like a nail, and a center block 17 is fixedly provided at the center of the centering shaft 14. like Figure 2 and Figure 3 As shown, a mounting hole is drilled through the center of the center block 17, and a telescopic damping rod 22 is embedded through the center of the center block 17. A sleeve 16 with a measuring head 21 is fixedly installed at each end of the telescopic damping rod 22, and two other sleeves 16 are slidably installed at both ends of the centering shaft 14. like Figure 2As shown, two sleeves 16 are fixedly provided with telescopic springs 19 between them and the center block 17. The two telescopic springs 19 are sleeved on both ends of the telescopic damping rod 22. The center block 17 is elastically connected to the sleeves 16 at both ends of the telescopic damping rod 22 through the telescopic springs 19 on both sides. Two compression springs 18 are fixedly provided between them and the center block 17. The two compression springs 18 are sleeved on both ends of the centering shaft 14. The center block 17 is elastically engaged with the sleeves 16 at both ends of the centering shaft 14 through the compression springs 18 on both sides. At this time, the four sleeves 16 and the center block 17 form a cross-shaped radial telescopic path.

[0024] Specifically, by rotating the handle to rotate the splined rod 26, due to the splined engagement between the splined rod 26 and the keyhole 24 of the threaded rod 23, the splined rod 26 drives the threaded rod 23 to rotate synchronously. The threaded rod 23 is threadedly engaged with the inner wall of the handle 10. During rotation, the threaded rod 23 moves axially along the handle 10, thereby driving the centering shaft 14 and the center block 17 to rotate synchronously, realizing the depth adjustment of the measuring mechanism along the axial direction of the air vent sleeve. At the same time, when there is local deformation or tilting of the inner diameter of the air vent sleeve, the inner wall will affect the two sleeves corresponding to the telescopic damping rod 22. The pressure generated by the seat 16 compresses or stretches the corresponding telescopic spring 19, ensuring that the measuring head 21 remains close to the inner wall of the air vent sleeve but not in contact with it. At the same time, the telescopic damping rod 22 can extend and retract to buffer the movement speed of the two end seat 16, preventing the measuring head 21 from being damaged or causing measurement errors due to impact. Furthermore, the four sets of seat 16 are linked together by the connecting rod 15. When the seat 16 at both ends of the telescopic damping rod 22 moves, it will drive the seat 16 at both ends of the centering shaft 14 to adjust their positions synchronously through the connecting rod 15, ensuring that the measuring head 21 can measure the inner wall of the air vent sleeve from all directions.

[0025] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A device for measuring the inner diameter of an air vent sleeve, characterized in that, include A grip (10) is provided with a positioning plate (11) fixed on a fixed curved surface at one end of the grip (10). A double-headed telescopic measuring mechanism is located at the end of the handle (10) away from the positioning plate (11). The double-headed telescopic measuring mechanism includes a connecting rod (15), a sleeve (16), a measuring head (21), and a telescopic damping rod (22). The sleeves (16) are arranged in an array of four groups, and the four groups of sleeves (16) are hinged to each other by different connecting rods (15). The measuring head (21) is fixedly installed on one of the sleeves (16), and the telescopic damping rod (22) passes through and connects two opposite sleeves (16). A centering mechanism is located at one end of the grip (10) near the positioning plate (11). The centering mechanism includes a clamping rod (12), a linkage rod (27), a sleeve (28), and a threaded ring (29). A clamping rod (12) is hinged to each of the four sides of the sleeve (28). The linkage rod (27) is hinged between the clamping rod (12) and the sleeve (28). The threaded ring (29) is movably disposed between the grip (10) and the sleeve (28).

2. The air vent sleeve inner diameter measuring device according to claim 1, characterized in that, The positioning disk (11) has four sliding openings (13) arranged in an array. Each sliding opening (13) corresponds to a sliding support rod (12). The support rod (12) is shaped like a Z-shape. Each set of support rods (12) is symmetrically hinged to the sleeve (28) with two linkage rods (27).

3. The air vent sleeve inner diameter measuring device according to claim 2, characterized in that, The handle (10) has an external thread (25) on the curved surface near the positioning disk (11). The sleeve (28) has an L-shaped cross section. The sleeve (28) has a threaded ring (29) rotatably installed at the end away from the positioning disk (11). The threaded ring (29) is threaded to the external thread (25).

4. The air vent sleeve inner diameter measuring device according to claim 3, characterized in that, The grip (10) has a spline rod (26) inside the end near the positioning plate (11) that rotates through a bearing. A threaded rod (23) is fitted on the spline rod (26). A key hole (24) is opened in the center of the threaded rod (23). The key hole (24) is correspondingly engaged with the spline rod (26). The threaded rod (23) is threadedly embedded in the grip (10).

5. The air vent sleeve inner diameter measuring device according to claim 4, characterized in that, The threaded rod (23) is fixedly provided with a centering shaft (14) at one end away from the threaded ring (29). The centering shaft (14) is shaped like a nail, and a center block (17) is fixedly provided at the center of the centering shaft (14).

6. The air vent sleeve inner diameter measuring device according to claim 5, characterized in that, A telescopic damping rod (22) is embedded through the center of the central block (17). A sleeve (16) with a measuring head (21) is fixedly installed at each end of the telescopic damping rod (22). The other two sleeves (16) are slidably installed at both ends of the centering shaft (14).

7. The air vent sleeve inner diameter measuring device according to claim 6, characterized in that, Two of the sleeves (16) are fixedly provided with telescopic springs (19) between them and the center block (17). The two telescopic springs (19) are sleeved on both ends of the telescopic damping rod (22). The center block (17) is elastically connected to the sleeves (16) at both ends of the telescopic damping rod (22) through the telescopic springs (19) on both sides. Two other sleeves (16) are fixedly provided with compression springs (18) between them and the center block (17). The two compression springs (18) are sleeved on both ends of the centering shaft (14). The center block (17) is elastically engaged with the sleeves (16) at both ends of the centering shaft (14) through the compression springs (18) on both sides.

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