A hydraulic cylinder clamping device for metallurgical industry

Abstract

The present invention discloses a hydraulic cylinder clamping device for the metallurgical industry, comprising a support unit, the support unit having accommodation spaces corresponding to the two ends of the hydraulic cylinder barrel respectively; a clamping mechanism, located at the first accommodation space of the support unit, the clamping mechanism limiting the first direction of the hydraulic cylinder barrel; and a limiting mechanism, located at the second accommodation space of the support unit, the limiting mechanism limiting the second direction of the hydraulic cylinder barrel. The present invention can clamp and fix the hydraulic cylinder in four directions of front, back, left, and right, with good fixing effect and simple fixing operation, and is convenient for disassembly and assembly of the hydraulic cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of clamping devices in the metallurgical industry, and in particular relates to a hydraulic cylinder clamping device in the metallurgical industry. Background Art

[0002] Since the beginning of the new century, with the development of national construction, the metallurgical industry has played an increasingly important role in the national economy. Compared with traditional technologies, hydraulic technology has the advantages of large transmission capacity and light weight, and can be applied to heavy, large and extra-large equipment. Therefore, it plays an irreplaceable role in the metallurgical field and is widely used in metal smelting and subsequent finishing.

[0003] As an actuator in hydraulic technology, the hydraulic cylinder is generally locked layer by layer through bolt threads. In order to increase the fixing effect of the hydraulic cylinder, multiple bolts are generally required for fixing. The process is relatively cumbersome, and it is inconvenient to install and replace the hydraulic cylinder. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a hydraulic cylinder clamping device for metallurgical industry, comprising:

[0007] A support unit, wherein the support unit has accommodation spaces corresponding to two ends of the hydraulic cylinder respectively;

[0008] a clamping mechanism, located at a first accommodation space of the support unit, the clamping mechanism limiting a first direction of the hydraulic cylinder; and

[0009] The limiting mechanism is located at the second accommodating space of the supporting unit, and the limiting mechanism limits the second direction of the hydraulic cylinder.

[0010] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, wherein: the first accommodating space is an accommodating groove provided on the supporting unit, and the clamping mechanism includes clamping members located on both sides of the accommodating groove and control mechanisms respectively connected to the clamping members;

[0011] Wherein, the control mechanism controls the clamping members on both sides to move in opposite directions.

[0012] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, the clamping member is relatively arranged through a slide rail, the control mechanism includes a lead screw and a slider nut, the lead screw and the slide rail are perpendicular to each other, and the slider nut is hinged to the clamping member through a connecting rod.

[0013] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, wherein: the clamping mechanism further includes a locking mechanism, the locking mechanism includes a limit gear, a fixed part and a movable part, the limit gear rotates synchronously with the lead screw, and the fixed part is provided with an internal tooth groove meshing with the limit gear;

[0014] Wherein, the movable part can move along the axial direction of the lead screw to make the limiting gear and the internal tooth groove disengage from each other.

[0015] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, the limiting gear is sleeved on the outer side of the rotating shaft axially connected to the screw, the limiting gear is axially provided with a polygonal inner cavity, and a push block matching the polygonal inner cavity is fixed on the rotating shaft.

[0016] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, the movable part includes a rotating seat sleeved on the outer side of the rotating shaft, and the limiting gear is rotatably connected to the rotating seat.

[0017] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, wherein: the locking mechanism further comprises a cylinder and a piston member in sealing contact with the inner wall of the cylinder, and the rotating shaft passes through the cylinder and the piston member;

[0018] Wherein, the movable part further comprises a connecting rod fixedly connected to the piston part, and the connecting rod penetrates the first end cover of the cylinder and is fixedly connected to the rotating seat outside the cylinder.

[0019] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, a spring is connected between the piston member and the first end cover, and an air filling cavity is left between the piston member and the second end cover of the cylinder.

[0020] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, wherein: the limiting mechanism comprises two limiting rods distributed in parallel, the limiting rods are arranged perpendicular to the rotating shaft, and the distance between the two limiting rods forms the second accommodating space;

[0021] Wherein, the limiting mechanism further comprises an operating device for driving the two limiting rods to move in opposite directions along the supporting unit.

[0022] As a preferred solution of the hydraulic cylinder clamping device for the metallurgical industry of the present invention, wherein: the operating device comprises a screw rod and a support block perpendicular to the limit rod, the support block is located between the two limit rods, and the middle part of the screw rod is rotatably connected to the support block;

[0023] Wherein, both ends of the screw are respectively threadedly connected to the limiting rod;

[0024] Wherein, the thread directions at two ends of the screw are opposite.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention discloses a novel hydraulic cylinder clamping device for the metallurgical industry. A clamping mechanism and a supporting device are respectively arranged at the top and the middle of the inner side of a supporting frame. The bottom of the cylinder body of the hydraulic cylinder is supported by a supporting plate of the supporting device, and a fixing mechanism is arranged at the rear end of the supporting plate. The left and right sides of the bottom of each hydraulic cylinder are clamped and fixed by the fixing mechanism, and the front and rear sides of the top of the hydraulic cylinder are clamped and fixed by the front and rear plates of the clamping mechanism respectively, so as to support the hydraulic cylinder and clamp and fix the hydraulic cylinder in four directions of front, back, left and right. The fixing effect is good, and each fixing operation only requires rotating a bolt head or turning a rocker. The fixing operation is simple, and the hydraulic cylinder can be easily disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the hydraulic cylinder after installation of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the limiting mechanism of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the clamping mechanism at the first accommodating space of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the clamping mechanism in the support plate mounting cavity of the present invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of the connection between the locking mechanism and the clamping mechanism of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the connection between the piston member and the movable member of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the cylinder of the present invention;

[0036] Fig. 9 It is a schematic diagram of the internal structure of the locking mechanism of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figure 1 , Figure 2 , is the first embodiment of the present invention, which provides a hydraulic cylinder clamping device for the metallurgical industry, including a support unit 100, a clamping mechanism 200 and a limiting mechanism 300. The support unit 100 has accommodating spaces corresponding to the two ends of the hydraulic cylinder barrel 401 respectively, one end of the hydraulic cylinder barrel 401 is placed at the first accommodating space N1, and the other end of the hydraulic cylinder barrel 401 is placed at the second accommodating space N2; the clamping mechanism 200 is located at the first accommodating space N1 of the support unit 100, and the clamping mechanism 200 limits the first direction of the hydraulic cylinder barrel 401; the limiting mechanism 300 is located at the second accommodating space N2 of the support unit 100, and the limiting mechanism 300 limits the second direction of the hydraulic cylinder barrel 401.

[0042] It should be noted that, in this embodiment, the first direction and the second direction are perpendicular to each other. For example, the first direction is the left-right direction of the hydraulic cylinder 401 , and the second direction is the front-back direction of the hydraulic cylinder 401 .

[0043] In this embodiment, the hydraulic cylinder 401 is clamped and fixed at four positions, front, back, left, and right, respectively, by the clamping mechanism 200 and the limiting mechanism 300, and the fixing effect is good.

[0044] Example 2

[0045] Reference Figures 1 to 3 , this embodiment is different from the first embodiment in that: the support unit 100 includes support legs 101 on both sides and a support plate 102 located between the support legs 101 on both sides, the support plate 102 is located in the middle of the support legs 101, the first accommodation space N1 is an accommodation groove provided on the support plate 102, and a through hole is provided in the accommodation groove for the output rod 402 of the hydraulic cylinder 400 to extend out;

[0046] The limiting mechanism 300 includes two limiting rods 301 distributed in parallel. The two limiting rods 301 are located between the supporting feet 101 on both sides and on the top of the supporting feet 101. The distance between the two limiting rods 301 forms a second accommodating space N2.

[0047] The hydraulic cylinder 400 is placed upside down in the accommodating groove, the output rod 402 extends to the outside of the through hole, one end of the hydraulic cylinder barrel 401 is placed in the first accommodating space N1 and supported by the support plate 102, and the other end of the hydraulic cylinder barrel 401 is located in the second accommodating space N2 between the two limit rods 301.

[0048] It should be noted that the clamping mechanism 200 includes clamping members 201 located on both sides of the accommodating groove and control mechanisms 202 respectively connected to the clamping members 201, wherein the control mechanism 202 controls the clamping members 201 on both sides to move in the opposite direction. The control mechanism 202 can simultaneously control the clamping members 201 on both sides to move in the opposite direction synchronously, thereby achieving the clamping and fixing of the ends of the hydraulic cylinder 401 by the clamping members 201 on both sides at the same time.

[0049] The limiting mechanism 300 includes an operating device 302 for driving the two limiting rods 301 to move synchronously in opposite directions. Guide rails 101a are respectively provided on the supporting feet 101. The two ends of the limiting rods 301 are respectively slidably arranged on the guide rails 101a. The limiting mechanism 300 can simultaneously control the limiting rods 301 on both sides to move synchronously in opposite directions, so that the limiting rods 301 on both sides can clamp and fix the end of the hydraulic cylinder 401 at the same time.

[0050] In this embodiment, each fixing operation only needs to control one control mechanism 202 or operating device 302, so the fixing operation is simple and the hydraulic cylinder 400 can be easily disassembled and assembled.

[0051] Example 3

[0052] Reference Figures 1 to 3This embodiment is different from the first embodiment in that: the operating device 302 includes a screw rod 302a and a support block 302b of a vertical limit rod 301, the support block 302b is located between the two limit rods 301 and fixed on the support foot 101, and the middle part of the screw rod 302a is rotatably connected to the support block 302b; the screw rod 302a is formed by a first screw rod 302a-1 and a second screw rod 302a-2 coaxially connected, the first screw rod 302a-1 and the second screw rod 302a-2 are respectively threadedly connected to a limit rod 301, and the thread directions of the first screw rod 302a-1 and the second screw rod 302a-2 are opposite; by rotating the screw 302a, the limit rods 301 on both sides can be driven to move toward each other along the guide rail 101a at the same time.

[0053] Of course, the operating device 302 may also include a rotating handle 302c connected to the screw 302a. It is more convenient and labor-saving to operate the screw 302a to rotate by rotating the handle 302c. In order to prevent the limit rod 301 from falling off the guide rail 101a, technicians in this field may also set a stopper at the end of the guide rail 101a to achieve the above purpose, which is within the protection scope of the present invention.

[0054] It should be noted that the limit rod 301 is arranged perpendicular to the lead screw 202a, that is, the limit rod 301 is arranged parallel to the slide rail 201a, and the clamping direction of the limit rod 301 is perpendicular to the clamping direction of the clamping member 201, so as to clamp and fix the hydraulic cylinder 401 in four directions of front, back, left and right.

[0055] Example 4

[0056] Reference Figure 4 , Figure 5 , this embodiment is different from the first embodiment in that: specifically, the support plate 102 is provided with a mounting cavity N3 at a position opposite to the first accommodation space N1, and the control mechanism 202 is installed in the mounting cavity N3;

[0057] The installation cavity N3 is located at one side of the first accommodation space N1. A slide rail 201a is provided near the first accommodation space N1 in the installation cavity N3. The clamping members 201 are distributed at both ends of the slide rail 201a. The clamping members 201 are slidably disposed on the slide rail 201a through sliders 201b.

[0058] The control mechanism 202 includes a lead screw 202a and a slider nut 202b. The lead screw 202a and the slide rail 201a are perpendicular to each other. A fixing piece 201c is provided in the middle of the slide rail 201a. The end of the lead screw 202a is rotatably connected to the fixing piece 201c via a bearing. The slider nut 202b is restricted by the mounting cavity N3 and cannot rotate in the circumferential direction. The slider nut 202b is threadedly connected to the lead screw 202a. When the lead screw 202a rotates, the slider nut 202b can be driven to move axially. The slider nut 202b is hinged to the slider 201b via a connecting rod 202c. When the slider nut 202b moves axially, the sliders 201b on both sides can be driven to move toward each other along the slide rail 201a at the same time.

[0059] It should be noted that the slider nut 202b is restricted by the installation cavity N3 and cannot rotate in the circumferential direction. This can be achieved by setting a guide rail extending along the axial direction of the lead screw 202a in the installation cavity N3, and the slider nut 202b can move along the guide rail. Of course, those skilled in the art can also use other conventional structures to achieve the above purpose, all of which are within the scope of protection of the present invention.

[0060] Example 5

[0061] Reference Figure 5 , Figure 6 , this embodiment is different from the first embodiment in that: the clamping mechanism 200 further includes a locking mechanism 203, the locking mechanism 203 includes a limit gear 203a, a fixing member 203b and a movable member 203c, and the limit gear 203a rotates synchronously with the lead screw 202a;

[0062] The fixing member 203b is in the shape of a cylinder sleeved on the outer side of the limiting gear 203a. The fixing member 203b is provided with an inner tooth groove 203b-1 meshing with the limiting gear 203a. When the limiting gear 203a is embedded in the inner tooth groove 203b-1, the limiting gear 203a cannot rotate in the circumferential direction, that is, the lead screw 202a cannot rotate, thereby achieving the locking purpose;

[0063] The movable part 203c can move axially along the lead screw 202a to disengage the limit gear 203a and the inner tooth groove 203b-1. When disengaged, the limit gear 203a is unrestricted and the lead screw 202a can rotate freely to achieve the purpose of unlocking.

[0064] Specifically, the lead screw 202a is also fixedly connected to the rotating shaft 204 in the axial direction, and a sliding member 203a-2 is fixedly provided at the axis center of the limit gear 203a. The sliding member 203a-2 is sleeved on the outer side of the rotating shaft 204 and can slide axially along the rotating shaft 204. A polygonal inner cavity 203a-1 extending along the axial direction is also provided in the sliding member 203a-2. A push block 204a matching the polygonal inner cavity 203a-1 is fixedly provided on the rotating shaft 204. When the sliding member 203a-2 slides axially along the rotating shaft 204, the push block 204a is always located in the polygonal inner cavity 203a-1, that is, the limit gear 203a When the limiting gear 203a and the inner tooth groove 203b-1 are disengaged from each other, the push block 204a is still located in the polygonal inner cavity 203a-1, that is, the rotating shaft 204 realizes synchronous rotation with the limiting gear 203a through the push block 204a. When the limiting gear 203a and the inner tooth groove 203b-1 are disengaged from each other, the limiting gear 203a is unrestricted, and the lead screw 202a can be driven to rotate by rotating the rotating shaft 204. When the limiting gear 203a is embedded in the inner tooth groove 203b-1, the rotating shaft 204 is restricted from rotating by the limiting gear 203a, thereby achieving the locking purpose and being unable to be disassembled.

[0065] It should be noted that the movable part 203c includes a rotating seat 203c-1 sleeved on the outside of the rotating shaft 204, and the limiting gear 203a is rotatably connected to the rotating seat 203c-1 through a bearing. The movable part 203c and the limiting gear 203a are relatively fixed in the axial direction, and the axial movement of the movable part 203c can drive the axial movement of the limiting gear 203a; at the same time, the limiting gear 203a can rotate circumferentially around the rotating seat 203c-1, and the limiting gear 203a can rotate freely in the circumferential direction.

[0066] Example 6

[0067] Reference Figures 5 to 8 , this embodiment is different from the first embodiment in that: the locking mechanism 203 also includes a cylinder 203d and a piston 203e in sealing contact with the inner wall of the cylinder 203d, the axial ends of the cylinder 203d are closed by a first end cover 203d-1 and a second end cover 203d-2, the cylinder 203d is fixedly connected to the fixing member 203b along the axial direction, the piston 203e is slidably arranged between the first end cover 203d-1 and the second end cover 203d-2, and the rotating shaft 204 axially penetrates the cylinder 203d, the first end cover 203d-1, the piston 203e and the second end cover 203d-2;

[0068] Among them, the movable part 203c also includes a connecting rod 203c-2 fixedly connected to the piston part 203e, the connecting rod 203c-2 is evenly distributed along the circumference of the rotating shaft 204, and a gap is left between two adjacent connecting rods 203c-2. The connecting rod 203c-2 passes through the first end cover 203d-1 of the cylinder 203d and is fixedly connected to the rotating seat 203c-1 located outside the cylinder 203d.

[0069] It should be noted that a spring 203f is connected between the piston member 203e and the first end cover 203d-1, an air filling cavity P1 is left between the piston member 203e and the second end cover 203d-2 of the cylinder 203d, and a gas interface 203d-3 is left on the side wall of the air filling cavity P1.

[0070] High-pressure gas is filled into the inflation chamber P1 through the gas interface 203d-3, pushing the piston 203e to compress the spring 203f in the cylinder 203d, pushing the connecting rod 203c-2 to drive the rotating seat 203c-1 and the limit gear 203a outside the cylinder 203d to move axially, thereby disengaging the limit gear 203a from the inner tooth groove 203b-1, and the limit gear 203a is unrestricted and in an unlocked state.

[0071] The high-pressure gas in the inflation chamber P1 is discharged from the gas interface 203d-3, and the spring 203f pushes the piston 203e to reset. The piston 203e drives the rotating seat 203c-1 and the limit gear 203a outside the cylinder 203d to move axially through the connecting rod 203c-2. The limit gear 203a is embedded in the internal tooth groove 203b-1 to achieve the locking purpose.

[0072] Example 7

[0073] Reference Figures 5 to 9 , this embodiment is different from the first embodiment in that: the cylinder 203d is a hollow annular cylinder, including a first cylinder 203d-4 and a second cylinder 203d-5 located at the axis of the first cylinder 203d-4, the rotating shaft 204 passes through the second cylinder 203d-5 and extends to be connected to the handle 203g on the outside, the rotating shaft 204 is in smooth contact with the inner wall of the second cylinder 203d-5, and the rotating shaft 204 rotates freely in the second cylinder 203d-5;

[0074] Among them, the first cylinder 203d-4 and the second cylinder 203d-5 are integrally formed through the first end cover 203d-1, the second end cover 203d-2 closes the open ends of the first cylinder 203d-4 and the second cylinder 203d-5, the spring 203f is sleeved on the outside of the second cylinder 203d-5, and the piston member 203e is slidably connected to the outside of the second cylinder 203d-5.

[0075] It should be noted that an auxiliary gear 203h is also provided on the rotating shaft 204 near the handle 203g. The auxiliary gear 203h has the same parameters as the limiting gear 203a. When in the unlocked state, the auxiliary gear 203h rotates synchronously with the limiting gear 203a. The rotation position of the limiting gear 203a can be determined by observing the rotation position of the auxiliary gear 203h, thereby ensuring that the limiting gear 203a can smoothly enter the inner tooth groove 203b-1.

[0076] In order to facilitate determining the rotational position of the auxiliary gear 203h, a spring return member 203i is provided on the outer side of the second end cover 203d-2. The spring return member 203i includes a shell 203i-1 fixed to the outer side of the second end cover 203d-2, a ball member 203i-2 and a return spring 203i-3. The ball member 203i-2 and the return spring 203i-3 are both wrapped by the shell 203i-1. The return spring 203i-3 is arranged along the radial direction of the auxiliary gear 203h. The pre-tightening force of the return spring 203i-3 causes the ball member 203i-2 to partially extend to the outside of the open end of the shell 203i-1, and the extended part of the ball member 203i-2 is located between two adjacent teeth of the auxiliary gear 203h. When the auxiliary gear 203h rotates, the ball member 203i-2 jumps from between the two teeth on one side to between the two teeth on the other side, thereby determining the rotation position of the auxiliary gear 203h; wherein, as long as the ball member 203i-2 is located between the two teeth of the auxiliary gear 203h, it is determined that the limit gear 203a can smoothly enter the inner tooth groove 203b-1.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A hydraulic cylinder clamping device for the metallurgical industry, characterized by: include, A support unit (100), the support unit (100) having accommodation spaces (N1, N2) corresponding to two ends of the hydraulic cylinder barrel (401) respectively; a clamping mechanism (200) located at a first accommodation space (N1) of the support unit (100), the clamping mechanism (200) limiting a first direction of the hydraulic cylinder (401); and A limiting mechanism (300) is located at the second accommodation space (N2) of the support unit (100), and the limiting mechanism (300) limits the second direction of the hydraulic cylinder (401); the first direction and the second direction are perpendicular to each other; The first accommodating space (N1) is a accommodating groove provided on the supporting unit (100); the clamping mechanism (200) comprises clamping members (201) located on both sides of the accommodating groove and control mechanisms (202) respectively connected to the clamping members (201); the control mechanism (202) controls the clamping members (201) on both sides to move in opposite directions; The clamping member (201) is arranged relative to the slide rail (201a), the control mechanism (202) comprises a lead screw (202a) and a slider nut (202b), the lead screw (202a) and the slide rail (201a) are perpendicular to each other, and the slider nut (202b) is hinged to the clamping member (201) via a connecting rod (202c); The clamping mechanism (200) further comprises a locking mechanism (203), the locking mechanism (203) comprising a limit gear (203a), a fixed part (203b) and a movable part (203c), the limit gear (203a) rotating synchronously with the lead screw (202a), the fixed part (203b) being provided with an internal tooth groove (203b-1) meshing with the limit gear (203a); the movable part (203c) being able to move axially along the lead screw (202a) to disengage the limit gear (203a) and the internal tooth groove (203b-1).

2. The metallurgical industry hydraulic cylinder clamping device according to claim 1, characterized in that: The limiting gear (203a) is sleeved on the outside of a rotating shaft (204) axially connected to the lead screw (202a); a polygonal inner cavity (203a-1) is axially provided on the limiting gear (203a); and a push block (204a) matching the polygonal inner cavity (203a-1) is fixedly provided on the rotating shaft (204).

3. The metallurgical industry hydraulic cylinder clamping device according to claim 2, characterized in that: The movable part (203c) comprises a rotating seat (203c-1) sleeved on the outside of the rotating shaft (204), and the limiting gear (203a) is rotatably connected to the rotating seat (203c-1).

4. The hydraulic cylinder clamping device for the metallurgical industry as claimed in claim 3, characterized in that: The locking mechanism (203) further comprises a cylinder (203d) and a piston member (203e) in sealing contact with the inner wall of the cylinder (203d), and the rotating shaft (204) passes through the cylinder (203d) and the piston member (203e); The movable member (203c) further comprises a connecting rod (203c-2) fixedly connected to the piston member (203e); the connecting rod (203c-2) passes through the first end cover (203d-1) of the cylinder (203d) and is fixedly connected to the rotating seat (203c-1) located outside the cylinder (203d).

5. The hydraulic cylinder clamping device for the metallurgical industry as claimed in claim 4, characterized in that: A spring (203f) is connected between the piston member (203e) and the first end cover (203d-1), and an air filling cavity (P1) is left between the piston member (203e) and the second end cover (203d-2) of the cylinder (203d).

6. The hydraulic cylinder clamping device for metallurgical industry as described in any one of claims 2 to 5, characterized in that: The limiting mechanism (300) comprises two limiting rods (301) distributed in parallel, the limiting rods (301) are arranged perpendicular to the rotating shaft (204), and the distance between the two limiting rods (301) forms the second accommodating space (N2); Wherein, the limiting mechanism (300) further comprises an operating device (302) for driving the two limiting rods (301) to move in opposite directions along the supporting unit (100).

7. The metallurgical industry hydraulic cylinder clamping device according to claim 6, characterized in that: The operating device (302) comprises a screw rod (302a) perpendicular to the limiting rod (301) and a support block (302b), wherein the support block (302b) is located between the two limiting rods (301), and the middle portion of the screw rod (302a) is rotatably connected to the support block (302b); Wherein, both ends of the screw rod (302a) are respectively threadedly connected to the limiting rod (301); The screw threads at both ends of the screw rod (302a) are in opposite directions.

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