Device for pulling out expansion sleeve in flange

Abstract

The utility model discloses a device for pulling out an expansion sleeve in a flange, which belongs to the technical field of disassembly of expansion sleeves and comprises a main screw, an operating rod is detachably sleeved on the peripheral side of one end of the main screw, a disc is fixedly connected to the other end of the main screw, and a plurality of threaded holes are uniformly formed in the edge of the disc at equal intervals along the axis of the disc. Wherein screws are in threaded connection with the interiors of part of the threaded holes, one ends of the screws penetrate through the threaded holes and are fixed through nuts, the other ends of the screws extend into threaded holes formed in the expansion sleeve and are in threaded connection with the expansion sleeve, the screws are evenly arranged in the axis direction of the disc at equal intervals, and the expansion sleeve is in interference fit with the interior of the flange. By adopting the structure, the screw is fixed in the threaded hole reserved in the disc and is connected with the threaded hole of the expansion sleeve, so that the expansion sleeve is uniformly stressed in each direction, and the expansion sleeve is completely pulled out by using the main screw rod through rotating torsion, so that the expansion sleeve and the flange are not damaged, and the function of quickly taking out the expansion sleeve is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of expansion sleeve extraction, in particular to a flange internal expansion sleeve extraction device. Background Art

[0002] In the prior art, when replacing the centrifuge roller head, the expansion sleeve in the flange must be pulled out to clean or replace the sealing ring in the cylinder. However, the expansion sleeve expands at high temperature and produces water rust due to the action of water circulation. It takes a long time to remove the expansion sleeve each time. In order to save time, the tensioning sleeve is often destroyed with a cutting gun to remove the expansion sleeve, and the flange and the main shaft are likely to be damaged. Utility Model Content

[0003] The utility model aims to provide a device for extracting a flange internal expansion sleeve to solve the above problems.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A device for extracting an expansion sleeve in a flange comprises a main screw, an operating rod is detachably sleeved on the circumferential side of one end of the main screw, a disc is fixedly connected to the other end of the main screw, a plurality of threaded holes are evenly and evenly spaced along the axis of the disc, some of the threaded holes are threadedly connected with screws, one end of the screw passes through the threaded hole and extends into the screw hole provided on the expansion sleeve and is threadedly connected to the expansion sleeve, and the screws are evenly and evenly spaced along the axial direction of the disc.

[0006] Preferably, a ring structure is sleeved on the circumferential side of the flange, and the ring structure and the flange do not slide relative to each other. A limiting sleeve structure is sleeved on the circumferential side of the disc, and the side of the limiting sleeve structure close to the expansion sleeve is clamped with the ring structure, and the other side of the limiting sleeve structure is fixed by external force so that the disc and the limiting sleeve structure are coaxial, and the disc can slide inside the limiting sleeve structure along its axial direction.

[0007] Preferably, the limit sleeve structure includes an axial limit sleeve, which is movably arranged on the circumferential side of the disc and coaxially arranged with the disc, a support member is fixedly connected to the outer wall of the axial limit sleeve, one end of the axial limit sleeve close to the expansion sleeve is hinged with one end of a plurality of hinge rods evenly spaced apart, the other end of the hinge rod is hinged with a claw structure, and the limit sleeve structure is clamped with the ring structure via the claw structure.

[0008] Preferably, the claw structure includes a plurality of hinge rods, which are arranged at equal intervals along the axial limit circumference, one end of the hinge rod is hinged to one end of the axial limit sleeve close to the expansion sleeve, and the other end of the hinge rod is hinged to a limit block, and the limit block can be inserted into the ring structure to limit the axial limit sleeve.

[0009] Preferably, the sleeve structure includes an external retaining ring, an internal retaining ring is fixedly connected to the inside of the external retaining ring, one end of a plurality of springs is fixedly connected to the inside of the internal retaining ring, the plurality of springs are arranged at equal intervals along the circumference of the internal retaining ring, an adjustment block is fixedly connected to the other end of the spring, an anti-slip rubber strip is fixedly connected to the end surface of the adjustment block away from the spring, and the anti-slip rubber strip is in contact with the flange.

[0010] Preferably, a limit slot is provided on the external clamping ring, and the limit block is disposed inside the limit slot.

[0011] Preferably, an annular groove is provided on the inner ferrule, and the annular groove and the side wall of the inner ferrule form an accommodating cavity, and the spring and the adjustment block are placed in the accommodating cavity.

[0012] Preferably, a groove is provided on the support member.

[0013] Compared with the prior art, the utility model has the following advantages and technical effects:

[0014] The utility model fixes a plurality of screws in threaded holes reserved on a disc and connects the screw holes of a tightening sleeve so that force is evenly applied in each direction, and then the tightening sleeve is completely pulled out by rotating torque using a main screw rod, thereby achieving the function of quickly taking out the tightening sleeve without damaging the tightening sleeve and the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0016] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the external structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the limit sleeve structure;

[0019] Figure 4It is an exploded view of the ring structure;

[0020] Figure numerals: 1. main screw; 3. screw; 4. expansion sleeve; 5. flange; 6. operating rod; 7. limit sleeve structure; 8. collar structure; 201. disc; 202. threaded hole; 701. support member; 702. axial limit sleeve; 703. hinge rod; 704. limit block; 801. external retaining ring; 802. internal retaining sleeve; 803. spring; 804. adjustment block; 8011. limit slot; 8021. ring groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Reference Figures 1 to 4 As shown, the utility model provides a device for extracting an expansion sleeve in a flange, comprising a main screw 1, a peripheral side of one end of the main screw 1 being detachably sleeved with an operating rod 6, a disk 201 being fixedly connected to the other end of the main screw 1, a plurality of threaded holes 202 being evenly and evenly spaced along the axis of the disk 201 on its edge, wherein some of the threaded holes 202 are internally threadedly connected with screws 3, one end of the screw 3 passes through the threaded hole 202 and extends into a threaded hole provided on the expansion sleeve 4 and is threadedly connected to the expansion sleeve 4, and the screws 3 are evenly and evenly spaced along the axial direction of the disk 201.

[0024] Several screws 3 are fixed in the threaded holes 202 reserved on the disc 201 and connected to the screw holes of the expansion sleeve 4 so that force is evenly applied in each direction. Then the main screw 1 is used to completely pull out the expansion sleeve 4 through rotating torque, thereby achieving the function of quickly removing the expansion sleeve 4 without damaging the expansion sleeve 4 and the flange 5.

[0025] A further optimized solution is that a ring structure 8 is sleeved on the circumferential side of the flange 5, and the ring structure 8 and the flange 5 do not slide relative to each other. A limiting sleeve structure 7 is sleeved on the circumferential side of the disc 201. The side of the limiting sleeve structure 7 close to the expansion sleeve 4 is clamped with the ring structure 8, and the other side of the limiting sleeve structure 7 is fixed by external force so that the disc 201 and the limiting sleeve structure 7 are coaxial, and the disc 201 can slide along its axial direction inside the limiting sleeve structure 7.

[0026] A further optimized solution is that the limit sleeve structure 7 includes an axial limit sleeve 702, which is sleeved on the circumferential side of the disc 201 and coaxially arranged with the disc 201, and a support member 701 is fixedly connected to the outer wall of the axial limit sleeve 702, and one end of the axial limit sleeve 702 close to the expansion sleeve 4 is hinged with one end of several hinge rods 703 at evenly spaced intervals, and the other end of the hinge rod 703 is hinged with a claw structure, and the limit sleeve structure 7 is clamped with the ring structure 8 through the claw structure.

[0027] A further optimized solution is that the claw mechanism includes a plurality of hinge rods 703, and the plurality of hinge rods 703 are arranged at equal intervals along the circumference of the axial limit sleeve 702. One end of the hinge rod 703 is hinged to an end of the axial limit sleeve 702 close to the expansion sleeve 4, and the other end of the hinge rod 703 is hinged to a limit block 704. The limit block 704 can be inserted into the ring structure 8 to limit the axial limit sleeve 702.

[0028] A further optimized solution is that the ring structure 8 includes an external retaining ring 801, an internal retaining ring 801 is fixedly connected to an internal retaining sleeve 802, one end of a plurality of springs 803 is fixedly connected to the internal retaining sleeve 802, the plurality of springs 803 are arranged at equal intervals along the circumference of the internal retaining sleeve 802, the other end of the spring 803 is fixedly connected to an adjustment block 804, an end surface of the adjustment block 804 away from the spring 803 is fixedly connected to an anti-slip rubber strip, and the anti-slip rubber strip is in contact with the flange 5.

[0029] To further optimize the solution, a limit slot 8011 is provided on the external retaining ring 801 , and the limit block 704 is clamped inside the limit slot 8011 .

[0030] According to a further optimization scheme, an annular groove 8021 is provided on the internal ferrule 802, and the annular groove 8021 and the side wall of the internal ferrule 802 form a receiving cavity, and the spring 803 and the adjustment block 804 are placed in the receiving cavity.

[0031] As a further optimization scheme, a groove is provided on the support member 701 , and the provision of the groove facilitates the operator to fix the limiting sleeve structure 7 in the axial direction.

[0032] The working process of the utility model is as follows:

[0033] When in use, firstly sleeve the collar structure 8 on the outside of the flange 5, and through the elastic potential energy of the spring 803, the adjustment block 804 is tightly attached to the outer wall of the flange 5, and the anti-slip rubber strip is provided to fix the position of the collar structure 8 on the flange 5. At this time, the limit block 704 is inserted into the limit slot 8011, and the limit sleeve structure 7 is dragged toward the end away from the flange 5 to straighten the hinge rod 703. At this time, the support member 701 is fixed by external force, that is, the limit sleeve structure 7 is fixed, the screw 3 and the disc 201 are assembled, and then the main screw 1 and the disc 201 are inserted into the axial limit sleeve 702, and the screw 3 is inserted into the threaded hole of the expansion sleeve 4. At this time, the operating lever 6 is rotated, and the rotational torque of the main screw 1 is used to pull out the expansion sleeve 4.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for extracting a flange internal expansion sleeve, characterized in that: The invention comprises a main screw (1), wherein an operating rod (6) is detachably sleeved on the circumferential side of one end of the main screw (1), and a disc (201) is fixedly connected to the other end of the main screw (1). A plurality of threaded holes (202) are evenly and evenly spaced on the edge of the disc (201) along its axis, wherein some of the threaded holes (202) are internally threadedly connected with screws (3), one end of the screw (3) passes through the threaded hole (202) and extends into a threaded hole provided on a tightening sleeve (4) and is threadedly connected to the tightening sleeve (4), and the screws (3) are evenly and evenly spaced along the axial direction of the disc (201).

2. A flange internal expansion sleeve extraction device according to claim 1, characterized in that: A collar structure (8) is sleeved on the circumferential side of the flange (5), and the collar structure (8) and the flange (5) do not slide relative to each other. A limit sleeve structure (7) is sleeved on the circumferential side of the disc (201), and the side of the limit sleeve structure (7) close to the expansion sleeve (4) is clamped with the collar structure (8), and the disc (201) can slide inside the limit sleeve structure (7) along its axial direction.

3. A flange internal expansion sleeve extraction device according to claim 2, characterized in that: The limiting sleeve structure (7) comprises an axial limiting sleeve (702), the axial limiting sleeve (702) being movably sleeved on the circumferential side of the disc (201) and being coaxially arranged with the disc (201), a support member (701) being fixedly connected to the outer wall of the axial limiting sleeve (702), a claw structure being hingedly connected at one end of the axial limiting sleeve (702) close to the expansion sleeve (4), and the limiting sleeve structure (7) being clamped with the collar structure (8) via the claw structure.

4. A flange internal expansion sleeve extraction device according to claim 3, characterized in that: The claw structure comprises a plurality of hinge rods (703), wherein the plurality of hinge rods (703) are arranged at equal intervals along the circumference of the axial limit sleeve (702), one end of the hinge rod (703) is hinged to an end of the axial limit sleeve (702) close to the expansion sleeve (4), and the other end of the hinge rod (703) is hinged to a limit block (704), and the limit block (704) can be clamped into the ring structure (8) to limit the axial limit sleeve (702).

5. A flange internal expansion sleeve extraction device according to claim 4, characterized in that: The collar structure (8) includes an external retaining ring (801), the interior of the external retaining ring (801) is fixedly connected to an internal retaining sleeve (802), one end of a plurality of springs (803) is fixedly connected to the interior of the internal retaining sleeve (802), the plurality of springs (803) are arranged at equal intervals along the circumference of the internal retaining sleeve (802), the other end of the spring (803) is fixedly connected to an adjustment block (804), the end surface of the adjustment block (804) away from the spring (803) is fixedly connected to an anti-slip rubber strip, and the anti-slip rubber strip is in contact with the flange (5).

6. A flange internal expansion sleeve extraction device according to claim 5, characterized in that: The external clamping ring (801) is provided with a limit slot (8011), and the limit block (704) is clamped inside the limit slot (8011).

7. A flange internal expansion sleeve extraction device according to claim 5, characterized in that: The inner sleeve (802) is provided with an annular groove (8021), and the annular groove (8021) and the side wall of the inner sleeve (802) form a receiving cavity, and the spring (803) and the adjustment block (804) are placed in the receiving cavity.

8. The device for extracting a flange internal expansion sleeve according to claim 3, characterized in that: The support member (701) is provided with a groove.

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