CN219951139U - Roller changing tool outside annealing furnace - Google Patents

Abstract

The utility model discloses an outer roller changing tool for an annealing furnace, which belongs to the technical field of furnace roller changing and comprises a transverse balancing frame; at least two hanging brackets fixedly connected with the transverse balancing stand; an ejection cylinder fixedly connected with one end of the transverse balancing frame; the transverse trolley is connected with the transverse balance frame in a sliding way; the first driving mechanism is fixedly arranged on the inner side of the transverse balance frame and can drive the transverse trolley to transversely reciprocate; the head clamp is fixedly connected with the transverse trolley and can be fixedly connected with the end part of the furnace roller; the counterweight mechanism is arranged below the transverse balance frame and connected with the transverse balance frame; and the second driving mechanism is arranged below the transverse balance frame and can drive the counterweight mechanism to transversely reciprocate. According to the utility model, the balance adjustment is performed by utilizing the lever principle and the transverse movement of the counterweight mechanism, and the furnace roller is installed in the tool by utilizing the head clamp and the transverse trolley, so that the site construction space is saved, and the furnace roller replacement efficiency is improved.

Description

Roller changing tool outside annealing furnace

Technical Field

The utility model relates to the technical field of furnace roller replacement, in particular to an outer furnace roller replacement tool of an annealing furnace.

Background

The production line of the treasured steel extra-long wire rod is provided with 4 sets of annealing furnaces, and each set of annealing furnaces is provided with hundreds of furnace rollers on average. Because of the special reason of the annealing furnace equipment, the space in the furnace is relatively narrow, the temperature is still relatively high after the furnace is shut down, the furnace is not suitable for construction by constructors, if the temperature in the furnace is reduced to be suitable for manual entry, a long time is required to wait, and the continuous production of the whole production line is directly affected; meanwhile, nitrogen and natural gas exist in the furnace, fatal danger can be generated when personnel enter the furnace, and the furnace roller cannot be overhauled or replaced.

In the traditional furnace roller replacing method, the furnace roller can only be pulled out from an opening on the side wall of the hearth, and the method comprises the following specific steps: firstly, respectively installing an extension bar at two ends of a furnace roller, manually supporting the extension bars at two sides of a furnace chamber so that the furnace roller is in a horizontal state, then drawing the furnace roller out of one side of the furnace chamber in a manual push-pull mode, after the whole furnace roller is drawn out of the furnace chamber, hanging the furnace roller by using a crane and a hanging belt, removing the extension bars, and finally lifting the furnace roller to a place. However, each annealing furnace is provided with hundreds of furnace rollers, and the whole replacement process needs a plurality of people and a plurality of machines to be matched with each other, so that the labor intensity is high, the construction operation time is long, and finally the furnace roller replacement efficiency is low.

Therefore, how to improve the replacement efficiency of the annealing furnace roller becomes a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

In view of the above, the utility model aims to provide an external roller changing tool for an annealing furnace, so as to solve the technical problem of low roller changing efficiency of the existing annealing furnace.

The utility model adopts the technical scheme that: an outer roll frock of changing of annealing stove includes:

a transverse balancing stand;

the hanging frames are arranged at intervals along the transverse direction and are fixedly connected with the transverse balancing frame;

the ejection cylinder is arranged along the transverse direction and is fixedly connected with one end of the transverse balancing frame;

the transverse trolley is connected with the transverse balance frame in a sliding manner;

the first driving mechanism is fixedly arranged on the inner side of the transverse balancing frame, is in transmission connection with the transverse trolley and can drive the transverse trolley to transversely reciprocate;

the head clamp is fixedly connected with the transverse trolley at one end and the furnace roller at the other end;

the counterweight mechanism is arranged below the transverse balance frame and is connected with the transverse balance frame;

the second driving mechanism is fixedly arranged below the transverse balance frame, is in transmission connection with the weight mechanism and can drive the weight mechanism to transversely reciprocate.

Preferably, the number of the ejection cylinders is two, and the two ejection cylinders are arranged in parallel one above the other.

Preferably, the two sides of the transverse balancing frame are provided with transverse guide rails, and the two sides of the transverse trolley are in one-to-one corresponding sliding connection with the two transverse guide rails.

Preferably, the first driving mechanism comprises a first driving motor, a pulling chain, a driving sprocket and a turning sprocket, wherein the first driving motor is fixedly arranged in the middle of the transverse balancing frame, the driving sprocket is in transmission connection with the first driving motor, the turning sprocket is arranged at one end of the transverse balancing frame, one end of the pulling chain bypasses the driving sprocket and is fixedly connected with the transverse trolley, and the other end of the pulling chain bypasses the turning sprocket and is fixedly connected with the transverse trolley.

Preferably, the head clamp comprises an upper clamping block, a lower clamping block, an upper stop block, a lower stop block, a mounting plate and a connecting plate, wherein the two connecting plates are transversely arranged in parallel and fixedly connected with the transverse trolley, two ends of the lower clamping block are vertically and fixedly connected with the connecting plates, and the upper clamping block is arranged above the lower clamping block and is detachably and fixedly connected with the lower clamping block; the lower stop block is arranged between the lower clamping block and the transverse trolley, two ends of the lower stop block are vertically and fixedly connected with the connecting plate, and the upper stop block is arranged above the lower stop block and is in sliding connection with the connecting plate along the vertical direction; the mounting plate is arranged above the upper stop block, two ends of the mounting plate are vertically and fixedly connected with the connecting plate, a distance adjusting bolt is connected to the mounting plate in a threaded mode, and the bottom end of the distance adjusting bolt is abutted to the upper stop block.

Preferably, the weight balancing mechanism comprises weight balancing plates, connecting frames and travelling wheels, wherein the weight balancing plates are arranged below the transverse balance frames along the longitudinal direction, the two connecting frames are arranged on two sides of the transverse balance frames, the bottom ends of the connecting frames are fixedly connected with the weight balancing plates, and the top ends of the connecting frames are connected with the travelling wheels; the travelling wheels are movably arranged in the transverse grooves on the side surfaces of the transverse balancing frames.

Preferably, the second driving mechanism comprises a second driving motor, a transmission screw, a longitudinal plate and a mounting seat, and the second driving motor is mounted at the other end of the transverse balancing frame; the transmission screw is arranged below the transverse balancing frame along the transverse direction, one end of the transmission screw is in transmission connection with the second driving motor, and the other end of the transmission screw is in rotation connection with the mounting seat fixedly arranged below the transverse balancing frame; the two ends of the longitudinal plate are fixedly connected with the two connecting frames in one-to-one correspondence, and the middle part of the longitudinal plate is in transmission connection with the transmission screw.

Preferably, the number of the hanging frames is two, one hanging frame is fixedly connected with the middle part of the transverse balancing frame, and the other hanging frame is fixedly connected with the other end of the transverse balancing frame.

The utility model has the beneficial effects that:

according to the utility model, the two hanging brackets are fixedly arranged on the transverse balance frame, so that the whole tool can be lifted through the travelling crane and the hanging belt, and the whole lifting of the tool and the furnace roller is facilitated; according to the utility model, the inner side of the transverse balance frame is connected with the transverse trolley in a sliding manner, one side of the transverse trolley is connected with the first driving mechanism in a transmission manner, the other side of the transverse trolley is fixedly connected with the head clamp, the transverse trolley can be fixedly connected with the end part of the furnace roller through the head clamp, and the furnace roller is driven to transversely move by the transverse trolley driven by the first driving mechanism, so that the furnace roller is pulled out from the hearth; meanwhile, one end of the transverse balancing frame is fixedly connected with the ejection cylinder, the other end of the transverse balancing frame is connected with the counterweight mechanism, the ejection cylinder can be used for fixing the relative axial positions of the transverse balancing frame and the hearth, and the counterweight mechanism is driven by the second driving mechanism to transversely move along the transverse balancing frame so as to adjust the overall gravity center positions of the furnace roller and the tool, so that the stability of the furnace roller in the pulling process is ensured, the automatic replacement of the furnace roller is realized, and the replacement efficiency of the furnace roller is improved.

Drawings

FIG. 1 is a schematic perspective view of an external roll changing tool of an annealing furnace;

FIG. 2 is a front view of an external roll changing tool of the annealing furnace;

FIG. 3 is a top view of an external roll changing tool of the annealing furnace of the utility model;

FIG. 4 is a schematic illustration of the attachment of a head clamp to a furnace roller;

FIG. 5 is a schematic view of a first driving mechanism;

fig. 6 is a schematic view of the structure of the furnace roller.

The reference numerals in the drawings illustrate:

1. a transverse balancing stand; 2. a hanging bracket; 3. an ejection cylinder; 4. a traversing vehicle; 5. a first driving mechanism; 6. a head clamp; 7. a weight mechanism; 8. a second driving mechanism; 9. a furnace roller; 10. a transverse guide rail; 11. a first driving motor; 12. pulling the chain; 13. a drive sprocket; 14. a turning sprocket; 15. an upper clamping block; 16. a lower clamping block; 17. an upper stopper; 18. a lower stop block; 19. a mounting plate; 20. a connecting plate; 21. a weight plate; 22. a connecting frame; 23. a walking wheel; 24. a second driving motor; 25. a drive screw; 26. a longitudinal plate; 27. a mounting base; 28. and a stop cover.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to be limiting.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

1-6, an external roller changing tool of an annealing furnace can pull out a furnace roller from an opening on one side of a hearth; this frock includes:

a transverse balancing stand 1, which transverse balancing stand 1 is arranged horizontally in the transverse direction.

The number of the hanging frames 2 is at least two, and all the hanging frames 2 are arranged at intervals along the transverse direction and are fixedly connected with the transverse balance frame 1.

And the ejection cylinder 3 is arranged along the transverse direction and is fixedly connected with one end of the transverse balance frame 1.

And a traversing carriage 4, wherein the traversing carriage 4 is arranged on the inner side of the transverse balance frame 1 and is in sliding connection with the transverse balance frame 1.

The first driving mechanism 5 is fixedly arranged on the inner side of the transverse balance frame 1, and the first driving mechanism 5 is in transmission connection with the transverse trolley 4 and can drive the transverse trolley 4 to transversely reciprocate.

And a head clamp 6, wherein one end of the head clamp 6 is fixedly connected with the transverse trolley 4, and the other end of the head clamp 6 can be fixedly connected with the end part of the furnace roller 9.

And a weight mechanism 7, wherein the weight mechanism 7 is arranged below the transverse balance frame 1 and is connected with the transverse balance frame 1.

The second driving mechanism 8 is fixedly arranged below the transverse balance frame 1, and the second driving mechanism 8 is in transmission connection with the weight mechanism 7 and can drive the weight mechanism 7 to transversely reciprocate.

According to the utility model, two hanging frames 2 are fixedly arranged on the transverse balance frame 1, and the whole tool can be lifted through a travelling crane and a hanging belt, so that the whole lifting of the tool and the furnace roller 9 is facilitated; the utility model is characterized in that a transverse trolley 4 is connected to the inner side of a transverse balance frame 1 in a sliding way, one side of the transverse trolley 4 is in transmission connection with a first driving mechanism 5, the other side of the transverse trolley 4 is fixedly connected with a head clamp 6, the transverse trolley 4 can be fixedly connected with the end part of a furnace roller 9 through the head clamp 6, and the transverse trolley 4 is driven by the first driving mechanism 5 to drive the furnace roller 9 to transversely move, so that the furnace roller 9 is pulled out from a hearth; meanwhile, one end of the transverse balancing frame 1 is fixedly connected with the ejection cylinder 3, the other end of the transverse balancing frame 1 is connected with the counterweight mechanism 7, the relative axial positions of the transverse balancing frame 1 and a hearth can be fixed through the ejection cylinder 3, and the counterweight mechanism 7 is driven to transversely move along the transverse balancing frame 1 through the second driving mechanism 8 so as to adjust the integral gravity center positions of the furnace roller 9 and the tooling, thereby ensuring the stability of the furnace roller 9 in the pulling process, realizing automatic replacement of the furnace roller 9 and improving the replacement efficiency of the furnace roller 9.

Note that, the lateral direction in this embodiment refers to the X-axis direction in fig. 1, the longitudinal direction refers to the Y-axis direction in fig. 1, and the vertical direction refers to the Z-axis direction in fig. 1.

In a specific embodiment, as shown in fig. 1, 2 and 3, the transverse balance frame 1 includes two balance beams, a head frame and a longitudinal beam, where the two balance beams are disposed in a transverse direction and parallel to each other; the transverse end of the balance beam is vertically and fixedly connected with the head frame, the transverse end of the balance beam is vertically and fixedly connected with the longitudinal beam, namely the left end of the balance beam is vertically and fixedly connected with the head frame, and the right end of the balance beam is vertically and fixedly connected with the longitudinal beam. The number of the ejection cylinders 3 is two, the two ejection cylinders 3 are arranged in parallel one above the other, and one end of each ejection cylinder 3 is fixedly connected with the head frame, namely the right end of each ejection cylinder 3 is fixedly connected with the head frame.

This is so arranged because: in the process of replacing the furnace roller, the whole tool is always in a suspended state; after the one end fixed connection ejection jar 3 of horizontal balancing stand 1, can extend ejection jar 3 and with furnace butt to make frock and furnace's relative position fixed, not only can guarantee the stability of whole frock, the sideslip car 4 of being convenient for still applys axial pulling force to furnace roller 9.

Preferably, as shown in fig. 1 and 3, transverse guide rails 10 are arranged on two sides of the transverse balance frame 1, that is, two transverse guide rails 10 are arranged, the two transverse guide rails 10 are fixedly arranged on the transverse beam in one-to-one correspondence, and two sides of the transverse trolley 4 are in one-to-one sliding connection with the two transverse guide rails 10.

In a specific embodiment, as shown in fig. 1, 3 and 5, the first driving mechanism 5 includes a first driving motor 11, a pulling chain 12, a driving sprocket 13 and a turning sprocket 14; the first driving motor 11 is fixedly arranged in the middle of the transverse balance frame 1, the driving chain wheel 13 and the turning chain wheel 14 are both in rotary connection with a balance beam of the transverse balance frame 1, the driving chain wheel 13 is in transmission connection with the first driving motor 11, and the turning chain wheel 14 is arranged at one end of the transverse balance frame 1; one end of the pulling chain 12 bypasses the driving sprocket 13 and is fixedly connected with the traversing carriage 4, and one end of the pulling chain 12 bypasses the turning sprocket 14 and is fixedly connected with the traversing carriage 4.

In other embodiments, the first driving mechanism 5 may also use other known transmission manners to drive the traversing carriage 4 to reciprocate transversely, such as installing a lead screw power transmission mechanism between the traversing carriage 4 and the transverse balancing frame 1.

In one embodiment, as shown in fig. 1, 3 and 4, the head clamp 6 includes an upper clamping block 15, a lower clamping block 16, an upper stop block 17, a lower stop block 18, a mounting plate 19 and a connecting plate 20; the number of the connecting plates 20 is two, the two connecting plates 20 are arranged in parallel along the transverse direction, and the right end of each connecting plate 20 is fixedly connected with the transverse trolley 4; the two longitudinal ends of the lower clamping block 16 are vertically and fixedly connected with the two connecting plates 20 in a one-to-one correspondence manner, the upper clamping block 15 is arranged above the lower clamping block 16, the upper clamping block 15 is detachably and fixedly connected with the lower clamping block 16 through a fastening bolt, arc-shaped grooves matched with the furnace roller 9 are formed in the opposite sides of the upper clamping block 15 and the lower clamping block 16, and the upper clamping block 15 and the lower clamping block 16 can clamp and fix the furnace roller 9 in the radial direction; the lower stop block 18 is arranged between the lower clamping block 16 and the transverse trolley 4, and two transverse ends of the lower stop block 18 are vertically and fixedly connected with two connecting plates 20 in one-to-one correspondence; the upper stop block 17 is arranged above the lower stop block 18, two longitudinal ends of the upper stop block 17 are in one-to-one corresponding sliding connection with the two connecting plates 20 along the vertical direction, so that the vertical distance between the upper stop block 17 and the lower stop block 18 is adjustable, and arc-shaped grooves matched with the furnace roller 9 in the direction are formed in one side, opposite to the upper stop block 17 and the lower stop block 18; the mounting plate 19 is disposed above the upper stop block 17, two ends of the mounting plate 19 in the longitudinal direction are vertically and fixedly connected with two connecting plates 20 in one-to-one correspondence, a distance adjusting bolt (not shown in the figure) is connected to the mounting plate 19 in a threaded manner, and the bottom end of the distance adjusting bolt penetrates through the mounting plate 19 and abuts against the upper stop block 17 so as to drive the upper stop block 17 to vertically move through screwing in and screwing out of the distance adjusting bolt, so that the upper stop block 17 and the lower stop block 18 can form stop fit with a stop cover 28 at the end part of the furnace roller 9 in the axial direction.

In other embodiments, the head clamp 6 may also employ other known attachment structures, such as: the pin shaft is connected, so that the furnace roller 9 is axially and fixedly connected with the transverse trolley 4.

In one embodiment, as shown in fig. 1, 2 and 3, the weight mechanism 7 includes a weight plate 21, a connecting frame 22 and a travelling wheel 23; wherein the weight plate 21 is disposed below the lateral balance frame 1 in the longitudinal direction, and the longitudinal dimension of the weight plate 21 is larger than the longitudinal dimension of the lateral balance frame 1; the number of the connecting frames 22 is two, the two connecting frames 22 are arranged on two longitudinal sides of the transverse balance frame 1, the bottom ends of the connecting frames 22 are detachably and fixedly connected with the counterweight plates 21 through bolts, and the top ends of the connecting frames 22 are connected with the travelling wheels 23; the travelling wheel 23 is movably arranged in a transverse groove on the side surface of the transverse balance frame 1 so as to enable the counterweight mechanism 7 to be in sliding connection with the transverse balance frame 1.

Preferably, the number of weight plates 21 is plural, so that the weight of the weight mechanism 7 can be adjusted by increasing or decreasing the number of weight plates 21.

More preferably, as shown in fig. 1, 2 and 3, the second driving mechanism 8 includes a second driving motor 24, a driving screw 25, a longitudinal plate 26 and a mounting base 27; wherein, the second driving motor 24 is arranged at the other end of the transverse balance frame 1, namely the second driving motor 24 is fixedly arranged at the right end of the transverse balance frame 1; the transmission screw 25 is arranged below the transverse balance frame 1 along the transverse direction, one end of the transmission screw 25 is in transmission connection with the second driving motor 24, and the other end of the transmission screw 25 is in rotation connection with the mounting seat 27; the mounting seat 27 is arranged below the middle part of the transverse balance frame 1, and the mounting seat 27 is fixedly connected with the transverse balance frame 1; the longitudinal plate 26 is disposed between the two connecting frames 22 along the longitudinal direction, two ends of the longitudinal plate 26 are fixedly connected with the two connecting frames 22 in a one-to-one correspondence manner, and the middle part of the longitudinal plate 26 is in transmission connection with the transmission screw 25, so that the counterweight mechanism 7 is driven to reciprocate transversely along the transverse balance frame 1 by the rotation of the transmission screw 25 and the transmission connection of the transmission screw 25 and the longitudinal plate 26.

In a specific embodiment, as shown in fig. 1, 2 and 3, the number of the hangers 2 is two, and one hanger 2 is disposed above the transverse balance frame 1, and one hanger 2 is fixedly connected to the middle of the transverse balance frame 1, and the other hanger 2 is fixedly connected to the other end of the transverse balance frame 1, that is, the other hanger 2 is fixedly connected to the right end of the transverse balance frame 1.

The use process of the tool disclosed by the utility model is as follows:

s10: the tooling is firstly reversed in place through the travelling crane and the hanging belt, the transverse travelling crane 4 is driven by the first driving mechanism 5 to transversely move to the left end of the tooling, so that the head clamp 6 extends out of the transverse balance frame 1, and finally the head clamp 6 is aligned with the end part of the furnace roller 9 to be dismantled through the horizontal fine adjustment of the travelling crane.

S20: the end of the furnace roller 9 is inserted between the upper clamping block 15 and the lower clamping block 16 of the head clamp 6 and between the upper stop block 17 and the lower stop block 18, then the stop cover 28 is fixedly connected with the furnace roller 9, finally the upper clamping block 15 and the lower clamping block 16 radially clamp the furnace roller through fastening bolts, and the upper stop block 17 is driven to move downwards through distance-adjusting bolts so as to enable the upper stop block 17 and the lower stop block 18 to axially abut against the stop cover 28 at the end of the furnace roller 9.

S30: the two ejection cylinders 3 (hydraulic cylinders) at the head are respectively adjusted to extend, and the extension of the ejection cylinders 3 not only can drive the whole tool and the furnace roller 9 to be pulled out, but also can enable the tool and the furnace chamber to be in an axial fixed state; after the furnace roller 9 is pulled out to a certain length, the first driving mechanism 5 drives the transverse trolley 4 to transversely move, so that the furnace roller 9 is dragged into the tool, and in the drawing process, the transverse position of the counterweight mechanism 7 is required to be adjusted through the second driving mechanism 8, so that the overall balance of the tool is ensured.

S40: after the furnace roller 9 enters the tooling, the tooling and the furnace roller 9 are dumped together by using a travelling crane.

Compared with the prior art, the utility model has at least the following beneficial technical effects:

the tool has the dead weight of about 3t and the loading capacity of 400kg, can hoist the transverse balance frame by utilizing the travelling crane according to the actual working requirement on site, and can achieve the effect of balancing the furnace roller during hoisting by adjusting the transverse position of the balance weight mechanism.

According to the tool, the balance adjustment is performed through the transverse movement of the counterweight mechanism by utilizing the lever principle, and the furnace roller can be installed in the tool by utilizing the head clamp and the transverse trolley, so that the site construction space is saved.

The tooling provided by the utility model can automatically draw the furnace roller, is convenient to transport, and greatly reduces the labor and material cost of roller changing operation; meanwhile, when the roller is replaced, a person does not need to enter the furnace to replace the roller, so that the risk of poisoning and choking when the nitrogen and the natural gas in the furnace are contacted is avoided.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (8)

1. An outer roll frock of changing of annealing stove, characterized in that includes:

a transverse balancing stand (1);

the hanging frames (2) are arranged at intervals along the transverse direction, and are fixedly connected with the transverse balancing frame (1);

the ejection cylinder (3) is arranged along the transverse direction and is fixedly connected with one end of the transverse balancing frame (1);

the transverse trolley (4) is connected with the transverse balance frame (1) in a sliding manner;

the first driving mechanism (5) is fixedly arranged on the inner side of the transverse balance frame (1), and the first driving mechanism (5) is in transmission connection with the transverse trolley (4) and can drive the transverse trolley (4) to transversely reciprocate;

the head clamp (6), one end of the head clamp (6) is fixedly connected with the transverse trolley (4), and the other end of the head clamp can be fixedly connected with the end part of the furnace roller (9);

the counterweight mechanism (7) is arranged below the transverse balance frame (1) and is connected with the transverse balance frame (1);

the second driving mechanism (8), the fixed below that sets up in horizontal balancing stand (1) of second driving mechanism (8), just second driving mechanism (8) are connected and can drive weight-balancing mechanism (7) horizontal reciprocating motion with weight-balancing mechanism (7) transmission.

2. The roll changing tool outside an annealing furnace according to claim 1, wherein the number of the ejection cylinders (3) is two, and the two ejection cylinders (3) are arranged in parallel one above the other.

3. The outer roll changing tool of the annealing furnace according to claim 1, wherein transverse guide rails (10) are arranged on two sides of the transverse balance frame (1), and two sides of the transverse trolley (4) are in one-to-one corresponding sliding connection with the two transverse guide rails (10).

4. The outer roll changing tool of the annealing furnace according to claim 1, wherein the first driving mechanism (5) comprises a first driving motor (11), a pulling chain (12), a driving sprocket (13) and a turning sprocket (14), the first driving motor (11) is fixedly arranged in the middle of the transverse balancing frame (1), the driving sprocket (13) is in transmission connection with the first driving motor (11), the turning sprocket (14) is arranged at one end of the transverse balancing frame (1), one end of the pulling chain (12) bypasses the driving sprocket (13) and is fixedly connected with the transverse trolley (4), and the other end bypasses the turning sprocket (14) and is fixedly connected with the transverse trolley (4).

5. The outer roll changing tool of the annealing furnace according to claim 1, wherein the head clamp (6) comprises an upper clamping block (15), a lower clamping block (16), an upper stop block (17), a lower stop block (18), a mounting plate (19) and a connecting plate (20), the two connecting plates (20) are arranged in parallel in the transverse direction and are fixedly connected with the traversing carriage (4), two ends of the lower clamping block (16) are vertically and fixedly connected with the connecting plates (20), and the upper clamping block (15) is arranged above the lower clamping block (16) and is detachably and fixedly connected with the lower clamping block (16); the lower stop block (18) is arranged between the lower clamping block (16) and the transverse trolley (4), two ends of the lower stop block (18) are vertically and fixedly connected with the connecting plate (20), and the upper stop block (17) is arranged above the lower stop block (18) and is in sliding connection with the connecting plate (20) along the vertical direction; the mounting plate (19) is arranged above the upper stop block (17), two ends of the mounting plate (19) are vertically and fixedly connected with the connecting plate (20), a distance adjusting bolt is connected to the mounting plate (19) in a threaded mode, and the bottom end of the distance adjusting bolt is abutted to the upper stop block (17).

6. The outer roll changing tool of the annealing furnace according to claim 1, wherein the weight balancing mechanism (7) comprises weight balancing plates (21), connecting frames (22) and travelling wheels (23), the weight balancing plates (21) are arranged below the transverse balancing frames (1) along the longitudinal direction, the two connecting frames (22) are arranged on two sides of the transverse balancing frames (1), the bottom ends of the connecting frames (22) are fixedly connected with the weight balancing plates (21), and the top ends of the connecting frames (22) are connected with the travelling wheels (23); the travelling wheel (23) is movably arranged in a transverse groove on the side surface of the transverse balance frame (1).

7. The outer roll changing tool of the annealing furnace according to claim 6, wherein the second driving mechanism (8) comprises a second driving motor (24), a transmission screw (25), a longitudinal plate (26) and a mounting seat (27), and the second driving motor (24) is mounted at the other end of the transverse balance frame (1); the transmission screw (25) is arranged below the transverse balancing frame (1) along the transverse direction, one end of the transmission screw (25) is in transmission connection with the second driving motor (24), and the other end of the transmission screw is in rotation connection with the mounting seat (27) fixedly arranged below the transverse balancing frame (1); the two ends of the longitudinal plate (26) are fixedly connected with the two connecting frames (22) in a one-to-one correspondence manner, and the middle part of the longitudinal plate (26) is in transmission connection with the transmission screw (25).

8. The outer roll changing tool of the annealing furnace according to claim 1, wherein the number of the hanging frames (2) is two, one hanging frame (2) is fixedly connected with the middle part of the transverse balancing frame (1), and the other hanging frame (2) is fixedly connected with the other end of the transverse balancing frame (1).