CN218905188U

CN218905188U - Sealing ring taking-out device

Info

Publication number: CN218905188U
Application number: CN202222870468.9U
Authority: CN
Inventors: 杨浩; 温武斌; 朱威; 陈明; 杨凯; 张磊
Original assignee: Guoneng Jiangsu Electric Power Engineering Technology Co ltd; CHN Energy Jianbi Power Plant; CHN Energy Jiangsu Power Co Ltd
Current assignee: Guoneng Jiangsu Electric Power Engineering Technology Co ltd; CHN Energy Jianbi Power Plant; CHN Energy Jiangsu Power Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-25
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a sealing ring taking-out device, which comprises a bracket provided with a vertical threaded hole; the screw vertically penetrates through the threaded hole and is in threaded connection with the bracket; a pushing head which is in a cone shape with a vertical axis and is connected to the bottom of the screw; the top ends of the at least two claw parts are hinged to the bracket, and the at least two claw parts are arranged at intervals along the circumferential direction and surround the pushing head, so that the pushing head pushes outwards to tightly seal the ring from the inner side when the pushing head moves vertically; and an elastic member connected between the at least two jaw portions for pulling the at least two jaw portions inward. Through above-mentioned technical scheme, with the claw portion with the support articulated, with claw portion and sealing washer joint simultaneously, then make claw portion follow inboard top closely seal the circle through the pushing head, reuse screw rod take out the sealing washer. The problem of because the seat hole space is narrow and small, the sealing washer is easily dug out, and when sealing washer quantity is great, a plurality of sealing washers take out long time consuming is solved.

Description

Sealing ring taking-out device

Technical Field

The disclosure relates to the field of tooling assistance, in particular to a sealing ring taking-out device.

Background

In the maintenance process of the turbine unit, in order to shorten the maintenance period, the sealing ring preset in the quick cooling seat hole is often required to be taken out as soon as possible after the unit is stopped, otherwise, the quick cooling device cannot be installed. The quick cooling seat hole is generally cylindrical, a sealing ring is arranged in the quick cooling seat hole, the axes of the sealing ring and the quick cooling seat hole are arranged in parallel, and meanwhile, the sealing ring is arranged on the end face of the bearing outer ring through mechanical pressing. But the quick cooling seat is positioned at the valve body of the steam turbine, the temperature is higher at the moment, an maintainer can only put on the anti-scalding glove, and a simple tool such as a digging needle is used for probing into the hole to hook out the sealing ring. Because the space is narrow and the operation surface cannot be seen clearly, the sealing ring is easy to dig and broken, and part of fragments are left in the seat hole, so that the difficulty in taking out is increased, and the fragments are also sucked into the cylinder by negative pressure. When the number of the sealing rings is large, the plurality of sealing rings are taken out completely, so that the time consumption is long, and the requirement of the quick cooling working period cannot be met.

Disclosure of Invention

The utility model aims at providing a sealing washer remove device to solve because the seat hole space is narrow and small, the sealing washer is easily dug the fracture, and when sealing washer quantity is great, a plurality of sealing washer are whole take out long-time problem.

In order to achieve the above object, the present disclosure provides a seal ring take-out device for picking up a seal ring in a seat hole, the take-out device including:

the bracket is provided with a vertical threaded hole;

the screw vertically penetrates through the threaded hole and is in threaded connection with the bracket;

a pushing head which is in a cone shape with a vertical axis and is connected to the bottom of the screw;

the top ends of the at least two claw parts are hinged to the bracket, and the at least two claw parts are arranged at intervals along the circumferential direction and surround the pushing head so as to be pushed outwards by the pushing head to jack the sealing ring from the inner side when the pushing head moves vertically; and

and the elastic piece is connected between the at least two claw parts and is used for pulling the at least two claw parts inwards.

Optionally, the extracting device further includes:

the support rod is used for being erected at the outer shaft end of the seat hole, sleeved on the screw rod and positioned above the bracket; and

the fixing nut is in threaded fit with the screw rod and is located above the supporting rod.

Alternatively, the number of the claw portions is three, and the claw portions are arranged at equal intervals in the circumferential direction.

Optionally, the claw part comprises a claw rod, a clamping plate and an abutting plate,

the top end of the clamping claw rod is hinged with the bracket;

the clamping plate is arranged at the outer side of the bottom end of the clamping claw rod, extends along the circumferential direction in the horizontal plane and is used for propping up the sealing ring;

the abutting plate is arranged on the inner side of the bottom end of the clamping claw rod and used for abutting against the side wall of the pushing head.

Optionally, the outside of joint board is the arc setting to can the form fit laminating to the inner circle of sealing washer.

Optionally, a U-shaped groove for accommodating the sealing ring is concavely formed on the side part of the arc-shaped end face

Optionally, the pushing head is configured in a conical shape, and an inner side of the abutting plate is formed into a cambered surface for matching with the pushing head in shape.

Optionally, the elastic element is a spring which sequentially passes through the plurality of claw rods in the horizontal plane and surrounds the claw rods to form a ring shape.

Optionally, the extracting device further includes a limiting ring, and the limiting ring is erected above the clamping plate and surrounds the outer part of the clamping claw rod, so as to limit the clamping claw rod within a preset rotation angle range.

Optionally, the bracket comprises a central part and a plurality of support arms horizontally radiating and extending from the central part, the threaded hole is formed in the central part, and the claw part is hinged on the support arms.

Optionally, the support arm includes first arm fork and second arm fork at circumference spaced apart, first shaft hole has been seted up to first arm fork, second arm fork has been seted up the second shaft hole, claw portion stretches into between first arm fork and the second arm fork to through in proper order run through first shaft hole, claw portion and the round pin axle in second shaft hole articulates to on the support arm.

Optionally, a rotating wheel for driving the screw to rotate is coaxially arranged at the top of the screw.

Through above-mentioned technical scheme, with the claw portion with the support articulated, carry out spacingly to the claw portion through the elastic component, stretch into the seating hole with the claw portion in, make claw portion and sealing washer joint, then make the propelling head vertical motion of screw rod bottom and outwards push away claw portion through screwing the screw rod, make claw portion follow inboard top closely seal, reuse the screw rod with accurate quick taking out of sealing washer. Therefore, the problems that the sealing rings are easy to dig due to the narrow space of the seat holes, and the time consumption is long when the number of the sealing rings is large are solved, and the requirements of the quick cooling working period are met.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic overall construction of a seal ring extraction device according to one embodiment of the present disclosure;

FIG. 2 is a schematic view of the screw, support rod and retaining nut of the seal ring removal device shown in FIG. 1;

FIG. 3 is a schematic view of the jaw portion of the seal ring removal device shown in FIG. 1;

FIG. 4 is a schematic view of the pusher head of the seal ring removal device shown in FIG. 1;

FIG. 5 is a schematic view of the structure of a bracket in a seal ring extraction device according to an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic view of a structure of a holder in a seal ring extraction device according to another exemplary embodiment of the present disclosure;

fig. 7 is a schematic view of the structure of a rotating wheel in a seal ring removing device according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

1. A bracket; 10. a threaded hole; 11. a support arm; 110. a first arm fork; 1100. a first shaft hole; 111. a second arm fork; 1110. a second shaft hole; 2. a screw; 3. a pushing head; 4. a clamping claw part; 40. a detent lever; 41. a clamping plate; 410. a U-shaped groove; 42. an abutting plate; 5. an elastic member; 6. a support rod; 60. a fixing nut; 7. a limiting ring; 8. and (3) rotating the wheel.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms of orientation such as "up, down, left, right" are generally used to refer to the direction in which the seal ring removal device provided by the present disclosure is normally used. "inner and outer" means both the inner and outer of the corresponding component profile. In addition, when the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The terms "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for order or importance. In designing the drawings, the following description refers to the same or similar elements in different drawings unless indicated otherwise.

The present disclosure provides a seal ring extraction device for picking up a seal ring in a seat hole, as shown in fig. 1 to 7, the extraction device comprising: a bracket 1, a screw 2, a pushing head 3, at least two clamping claw parts 4 and an elastic piece 5. Wherein, offer vertical screw hole 10 on the support 1, screw rod 2 vertically passes screw hole 10 and support 1 threaded connection. The pusher head 3 is constructed in a cone shape with a vertical axis, and is connected to the bottom of the screw 2. The top ends of the at least two claw parts 4 are respectively hinged to the bracket 1, and circumferentially arranged at intervals around the pushing head 3 so as to be pushed outwards by the pushing head 3 to tightly seal the ring from the inner side when the pushing head 3 moves vertically. An elastic member 5 is connected between the at least two jaw portions 4 for pulling the at least two jaw portions 4 inwardly.

When the seal ring taking-out device is used, firstly, the screw rod 2 is rotated relative to the bracket 1 to adjust the axial positions of the screw rod 2 and the pushing head 3, the smaller diameter position of the pushing head 3 corresponds to the claw parts 4, the smaller diameter position is abutted against the claw parts 4 under the action of the elastic piece 5, and at the moment, the integral outer diameter formed by the at least two claw parts 4 is smaller, so that the smaller inner diameter of the seal ring to be taken out is ensured. During specific operation, the whole of the taking-out device is placed in the seat hole, an operator fixes the bracket 1, then the screw rod 2 is rotated, the pushing head 3 moves along the axial direction, the side wall of the pushing head 3 is propped against the claw part 4, the pushing head 3 is in a conical shape, the diameter of the contact position of the pushing head 3 and the claw part 4 can be gradually increased along with the movement process, the claw part 4 is gradually expanded, the inner side is finally propped against the sealing ring, and the sealing ring is clamped with the clamping ring, so that the installation and fixation of the taking-out device are completed. Then, the taking-out device which has completed the grabbing action is taken out of the seat hole together with the sealing ring, and the screw rod 2 is rotated in the reverse direction of the previous process, the claw part 4 gradually contracts inwards, and the sealing ring naturally falls off from the claw part.

In short, the claw portion 4 is hinged with the support 1, the claw portion 4 is limited through the elastic piece 5, the claw portion 4 stretches into the seat hole, the claw portion 4 is clamped with the sealing ring, then the pushing head 3 at the bottom of the screw 2 moves vertically and pushes the claw portion 4 outwards through screwing the screw 2, the claw portion 4 tightly seals the ring from the inner side, and the sealing ring is accurately and rapidly taken out through the screw 2. Through the technical scheme, the problems that the sealing rings are easy to dig due to the narrow space of the seat holes and long time is consumed when the number of the sealing rings is large and the plurality of sealing rings are taken out completely are solved, and the requirements of the quick cooling working period are met. Meanwhile, by using the device, a great amount of time is saved in the related work of the steam turbine, the compensation operation of a 'closed cylinder' with too fast temperature drop of the steam turbine is avoided, and the service life of metal parts of the steam turbine is greatly prolonged.

In this embodiment, as shown in fig. 1 and 4, the end of the pushing head 3 with a larger diameter is connected to the bottom of the screw 2, but the disclosure is not limited thereto, for example, the small diameter section of the pushing head 3 is connected to the screw 2, and the rotation direction of the screw 2 is adjusted accordingly when in use. In addition, the screw rod 2 may be an M12 diameter carbon steel screw rod 2, and in other embodiments, other materials may be used, which may be selected according to practical requirements, and is not limited in any way.

According to some embodiments, in order to facilitate taking the taking-out device after grabbing the sealing ring out of the seat hole, referring to fig. 1 and 2, the taking-out device may further include a supporting rod 6 and a fixing nut 60, the supporting rod 6 is used for being set up at the outer shaft end of the seat hole, and the supporting rod 6 is sleeved on the screw rod 2 and is located above the support 1. The fixing nut 60 is in threaded fit with the screw 2 and is located above the support rod 6. When the sealing ring is used, at least two claw parts 4 are tightly contacted with the sealing ring from the inner side of the sealing ring and tightly propped up, the supporting rod 6 is sleeved on the screw rod 2 and is erected at the orifice of the seat hole, and then the fixing nut 60 is arranged above the supporting rod 6 in a threaded manner. When the fixing nut 60 abuts against the support bar 6, the device is fixed. Under the condition that the screw rod 2 is circumferentially fixed and the screw rod 2 is ensured not to rotate along with the fixing nut 60, the fixing nut 60 is continuously screwed towards the supporting rod 6, and at the moment, the fixing nut 60 does not axially displace due to the fact that the supporting rod 6 axially limits the fixing nut 60, so that the screw rod 2 can axially move relative to the fixing nut 60. The claw part 4 can drive the sealing ring to move upwards through the axial movement of the screw rod 2, and the sealing ring is taken out from the seat hole. The supporting rod 6 and the fixing nut 60 are matched with the screw rod 2 to obtain the sealing ring, so that the sealing ring has high structural strength, uniform stress and high bearing capacity during spiral jacking, and is time-saving and labor-saving. In some embodiments, referring to fig. 1 and 2, the supporting rod 6 may be a flat steel tube, a through hole of the screw rod 2 is formed in the center of the supporting rod 6, and the supporting rod 6 is sleeved on the screw rod 2 through the through hole.

The above-described at least two claw portions 4 may be provided so as to be equally spaced in the circumferential direction to maintain balance of the grasping force. In some embodiments, as shown in fig. 1, when three clamping claw portions 4 exist, the three clamping claw portions 4 are distributed on the support 1 at 120 degrees, that is, the clamping claw portions 4 can be symmetrically arranged along the axial direction of the support 1, so that opposite supports are formed to clamp the sealing ring, the surrounding stress is uniform, and the sealing ring can be conveniently drawn. It should be noted that the rotationally symmetrical arrangement means that on the basis of the relative arrangement, the distribution angles of the jaw portions 4 on the support 1 are evenly distributed, the central axis of the support 1 is used as the rotation center to form rotationally symmetrical, each jaw portion 4 is distributed in a position perpendicular to the central axis of the support 1 based on the stress balance direction, and the center of the stress balance is the center of the support 1. It is envisioned that when there are two clamping claw portions 4, the two clamping claw portions 4 are distributed on the bracket 1 at 180 degrees; when the clamping claw parts 4 are four, the four clamping claw parts 4 are distributed on the bracket 1 at 90 degrees; therefore, in other embodiments, the selection may be made according to actual requirements, and no limitation is made herein.

Referring to fig. 1 and 3, the jaw portion 4 may include a jaw lever 40, a jaw plate 41, and an abutment plate 42. Wherein the top end of the jaw lever 40 is hinged with the bracket 1. The clamping plate 41 is arranged on the outer side of the bottom end of the clamping claw rod 40 and extends along the circumferential direction in the horizontal plane for pushing up the tight sealing ring, and the horizontally extending clamping plate 41 can provide more contact area with the sealing ring in the circumferential direction, so that the grabbing force is improved. The abutment plate 42 is provided inside the bottom end of the detent lever 40 for abutting against the side wall of the pusher head 3. In some embodiments, the clamping plate 41 and the abutting plate 42 are fixedly connected to the bottom of the jaw rod 40, and one side of the clamping plate 41 facing the sealing ring is tightly propped against the inner ring of the sealing ring. The abutting plate 42 abuts against the outer wall of the pushing head 3, so that the contact area between the pushing head 3 and the claw portion 4 is increased, and the pushing head 3 pushes the claw portion 4 more conveniently.

The outer side of the clamping plate 41 may be arranged in an arc shape to be capable of being attached to the inner ring of the sealing ring in a form-fitting manner, so that the contact area of the two is increased.

Further, the side portion of the arc-shaped end surface of the clamping plate 41 may be concavely formed with a U-shaped groove 410 for receiving the seal ring. In some embodiments, referring to fig. 1 and 3, a side of the clamping plate 41 facing the sealing ring is provided in an arc shape adapted to an inner ring of the sealing ring, and a U-shaped groove 410 is formed in a horizontal plane along an extending direction of an arc end surface in a concave manner, and a guiding surface is formed at a notch of the U-shaped groove 410. In use, the claw portion 4 is moved toward the seal ring, the engagement plate 41 abuts against the inner ring of the seal ring, and at this time, the seal ring is guided into the U-shaped groove 410 by the guide of the guide surface. The screwing screw rod 2 drives the pushing head 3 to vertically move, the pushing head 3 pushes the clamping claw 4 from inside to outside through the abutting plate 42, the clamping plate 41 is further tightly contacted with the sealing ring from the inner side of the sealing ring and is tightly propped against the sealing ring, and the installation and fixation of the taking-out device are completed. The setting like this, when the jack-up is got the sealing washer, the contact of sealing washer and jack catch portion 4 is more firm, and is stable at the in-process of extracting, the situation that the sealing washer breaks away from jack catch portion 4 can not appear.

Alternatively, the pusher head 3 may be configured in a cone shape, i.e., the pusher head 3 is circular in cross section, while the inner side of the abutment plate 42 is formed as a cambered surface for shape-fitting with the pusher head 3. In some embodiments, referring to fig. 1, 3 and 4, the cambered surface of the big end of the pushing head 3 in the horizontal plane can be abutted with any cambered surface of the abutting plate 42 in the horizontal plane, and during the movement, the side wall of the pushing head 3 can always abut against the inner side of the abutting plate 42 to continuously push the claw portion 4 outwards. By this arrangement, the contact area between the pushing head 3 and the claw portions 4 is increased, so that the force applied to each claw portion 4 by the pushing head 3 is more uniform, and the sealing ring is more stable to be fixed on the clamping plate 41.

The arrangement of the elastic member 5 is not limited in this embodiment of the present disclosure, for example, a spring may be connected between every two adjacent claw bars 40, or referring to fig. 1, the elastic member 5 may be a spring that sequentially passes through a plurality of claw bars 40 in a horizontal plane and surrounds in a ring shape, and the spring has a tendency to shrink inwards. In some embodiments, as shown in fig. 1, the spring may be a thin spring, which is abutted into a ring shape after passing through the plurality of detent levers 40 in sequence in a horizontal plane. The spring retracts the detent lever 40 inwardly after looping due to the spring's ability to elastically deform. By the arrangement, the clamping claw rod 40 can be kept in an inward tightening state continuously, and the clamping claw rod can be inserted into the inner ring of the sealing ring more conveniently during use; and the setting of spring makes the radial size of pawl pole 40 still can stretch out and draw back, can effectual adaptation not unidimensional sealing washer pick up.

Optionally, the extracting device may further include a limiting ring 7, where the limiting ring 7 is disposed above the clamping plate 41 and surrounds the outer portion of the clamping jaw rod 40, so as to limit the clamping jaw rod 40 within a preset rotation angle range. In some embodiments, as shown in fig. 1, the stop ring 7 is a rigid stop ring 7 that is looped on the exterior of the jaw lever 40 and is not disposed off the jaw portion 4. In the use, promote the head 3 constantly and outwards push away the claw pole 40, at this moment, stop collar 7 is with claw pole 40 restriction in the angle range of predetermineeing, has avoided claw pole 40 too outwards to expand, will need the sealing washer of picking up to stretch out.

The bracket 1 may have any suitable shape, for example, referring to fig. 1, 5 and 6, the bracket 1 may include a central portion and a plurality of arms 11 horizontally radiating from the central portion, the threaded hole 10 is formed in the central portion, and the jaw portion 4 is hinged to the arms 11. In this way, a gap is left between two adjacent support arms 11, on the one hand, the effect of light weight is achieved, on the other hand, the support arms are convenient to hold by a hand, the support arms 11 can be grasped by an operator when screwing the screw 2, and the final rotation angle of the clamping part 4 can be adjusted conveniently.

The jaw portion 4 may be connected to the support arm 11 by means of a hinge, a rotation shaft, or the like, and according to an embodiment, referring to fig. 1, 5, and 6, the support arm 11 may include a first arm fork 110 and a second arm fork 111 disposed at intervals in a circumferential direction, the first arm fork 110 is provided with a first shaft hole 1100, the second arm fork 111 is provided with a second shaft hole 1110, the jaw portion 4 extends between the first arm fork 110 and the second arm fork 111, and is hinged to the support arm 11 by means of a pin shaft penetrating the first shaft hole 1100, the jaw portion 4, and the second shaft hole 1110 in order, such that the jaw portion 4 can freely rotate between the first arm fork 110 and the second arm fork 111.

In some embodiments, referring to fig. 1 and 5, when two clamping claw portions 4 exist, two supporting arms 11 on the bracket 1 are arranged corresponding to the two clamping claw portions 4, the two supporting arms 11 are symmetrically arranged, and the two clamping claw portions 4 are respectively hinged on the two supporting arms 11 through a pin shaft. The two claw parts 4 are arranged to pick up the sealing ring, so that the whole device can be light. It is conceivable that when there are three claw portions 4, the three support arms 11 on the bracket 1 are arranged corresponding to the three claw portions 4, the three support arms 11 are arranged at equal intervals, and the three claw portions 4 are respectively hinged on the three support arms 11 through pin shafts. The setting like this, pick up the sealing washer through three jack catch portion 4, can make jack catch portion 4 draw the in-process of sealing washer, the bearing capacity is higher, and the atress is more even. It will be appreciated that in other embodiments, when there are more than three jaw portions 4, the technical effect described above may also be achieved by analogy in the manner described above.

Alternatively, the top of the screw 2 may be coaxially provided with a rotation wheel 8 for driving the screw 2 into rotation. In some embodiments, referring to fig. 1 and 7, a rotating wheel may be mounted on top of the screw 2, the rotating wheel being detachably connected to the screw 2, the rotating wheel being for effecting linear movement of the screw 2. When the sealing ring is taken out from the seat hole, the sealing ring and the claw part 4 are in a propped state, the screw rod 2 is lifted up by screwing the rotary wheel 8, the pushing head 3 moves upwards along with the screw rod 2, when the pushing head 3 is separated from the abutting plate 42, the pushing head 3 does not apply external force to the claw part 4, the claw part 4 retracts inwards under the action of the spring, the sealing ring is separated from the U-shaped groove 410, and the sealing ring is completely taken out. The setting of swiveling wheel 8 is convenient for the staff to revolve and twist screw rod 2, simple operation, labour saving and time saving. In other embodiments, the outer ring of the rotating wheel 8 may be further provided with anti-skidding patterns, or concave to form finger grooves which are ergonomic, and may be selected according to practical requirements, without any limitation.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A seal ring extraction device for picking up a seal ring in a seat hole, the extraction device comprising:

the bracket is provided with a vertical threaded hole;

2. The seal ring extraction device of claim 1, wherein the extraction device further comprises:

3. The seal ring removing device according to claim 1, wherein the number of the click portions is three, and the click portions are arranged at equal intervals in the circumferential direction.

4. The gasket removal device of claim 1, wherein the jaw portion comprises a jaw lever, a jaw plate, and an abutment plate,

the top end of the clamping claw rod is hinged with the bracket;

5. The seal ring removing device according to claim 4, wherein the outer side of the engagement plate is provided in an arc shape so as to be capable of being fitted to the inner ring of the seal ring in a form-fitting manner.

6. The seal ring extraction device of claim 5, wherein the side of the arcuate end surface is concave-shaped with a U-shaped groove for receiving the seal ring.

7. The seal ring removing device according to claim 4, wherein the pushing head is configured in a conical shape, and an inner side of the abutting plate is formed as a cambered surface for shape-fitting with the pushing head.

8. The gasket removal device of claim 4, wherein the resilient member is a spring that passes through the plurality of detent levers in sequence in a horizontal plane and encloses a ring shape.

9. The seal ring extraction device of claim 4, further comprising a stop collar disposed above the snap plate and surrounding the exterior of the snap rod to limit the snap rod to a predetermined angular range.

10. The seal ring extraction device of claim 1, wherein said bracket includes a central portion and a plurality of arms extending radially from said central portion, said threaded bore being defined in said central portion, said jaw portions being hinged to said arms.

11. The seal ring removal device of claim 10, wherein the support arm includes first and second arm prongs spaced apart in a circumferential direction, the first arm prong defining a first shaft aperture, the second arm prong defining a second shaft aperture, the jaw portion extending between the first and second arm prongs and being hinged to the support arm by a pin extending sequentially through the first shaft aperture, the jaw portion and the second shaft aperture.

12. The seal ring removing device according to claim 1, wherein a rotating wheel for driving the screw to rotate is coaxially provided at the top of the screw.