CN112723133B

CN112723133B - Hoisting device and reaction kettle for catalysis

Info

Publication number: CN112723133B
Application number: CN202011640441.XA
Authority: CN
Inventors: 张文驰
Original assignee: Xuzhou Yaxing Medical Technology Co ltd
Current assignee: Xuzhou Kangcheng Pharmaceutical Technology Co.,Ltd.
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-10
Anticipated expiration: 2040-12-31
Also published as: CN112723133A

Abstract

The invention discloses a hoisting device, which comprises a suspension piece, wherein a rotating shaft is arranged on the suspension piece; the connecting piece is connected with the suspension piece and is rotationally connected with the rotating shaft; the suspension piece is further provided with a limiting assembly, and the limiting assembly is used for limiting the connecting piece to rotate. The limiting assembly limits the connecting piece to rotate so as to lock the proper angle adjusted by the object to be hoisted, and the invention is beneficial to searching the optimal installation angle and installation position of large equipment such as a reaction kettle.

Description

Hoisting device and reaction kettle for catalysis

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a hoisting device and a catalytic reaction kettle.

Background

The broad understanding of the reaction kettle is that the reaction kettle is a container for physical or chemical reaction, and the heating, evaporation, cooling and low-speed mixing functions required by the process are realized through the structural design and parameter configuration of the container.

The reaction kettle is widely applied to pressure vessels for petroleum, chemical engineering, rubber, pesticides, dyes, medicines and foods, and is used for completing technological processes such as vulcanization, nitration, hydrogenation, alkylation, polymerization, condensation and the like, such as a reactor, a reaction kettle, a decomposition kettle, a polymerization kettle and the like; the material is carbon manganese steel, stainless steel, zirconium, nickel-based alloy and other composite materials.

The whole size of the reaction kettle is large, and the reaction kettle needs to be lifted by a lifting appliance and then installed when being installed; however, the general lifting appliance can rotate the object arbitrarily, which is not beneficial to the installation of large equipment such as a reaction kettle; if a specific lifting appliance which cannot rotate is adopted, the problem can be solved, but the optimal installation angle and installation position of large equipment such as a reaction kettle are not convenient to find. Therefore, the existing sling has the defects that the existing sling is not beneficial to the installation of large equipment such as a reaction kettle.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The invention is provided in view of the problem that radars with different sizes in the prior art need mounting seats with different sizes to be correspondingly mounted, so that the mounting is inconvenient.

Therefore, the invention aims to provide a hoisting device, which limits the rotation of a connecting piece through a limiting assembly so as to lock a proper angle adjusted by an object to be hoisted, and is beneficial to searching for an optimal installation angle and an optimal installation position of large equipment such as a reaction kettle.

In order to solve the technical problems, the invention provides the following technical scheme: a hoisting device comprises a hoisting device,

the suspension piece is provided with a rotating shaft; and the number of the first and second groups,

the connecting piece is connected with the suspension piece and is rotationally connected with the rotating shaft;

the suspension piece is further provided with a limiting assembly, and the limiting assembly is used for limiting the connecting piece to rotate.

As a preferable scheme of the hoisting device of the present invention, wherein: the limiting assembly comprises an operating piece positioned on the suspension piece and a matching piece positioned on the connecting piece, wherein a first connecting structure is arranged on the operating piece, and a second connecting structure is arranged on the matching piece;

the first connecting structure and the second connecting structure can be in contact with each other at the circumferential position of the rotating shaft;

the operating piece can move to enable the first connecting structure and the second connecting structure to be mutually separated along the axial direction of the rotating shaft.

As a preferable scheme of the hoisting device of the present invention, wherein: the operating part is tubular and is sleeved outside the rotating shaft, and the first connecting structure is a limiting block arranged outside the operating part; the matching piece is provided with an accommodating cavity, the second connecting structure is a limiting groove arranged on the inner wall of the accommodating cavity, and the limiting groove extends along the direction of the rotating shaft;

wherein the limiting block is connected with the limiting groove in an embedded manner;

wherein, the operating piece can move along the rotating shaft to enable the limiting block to be separated from the limiting groove.

As a preferable scheme of the hoisting device of the present invention, wherein: the limiting grooves are uniformly distributed on the inner wall of the accommodating cavity along the circumferential direction of the rotating shaft.

As a preferable scheme of the hoisting device of the present invention, wherein: the suspension piece is provided with a guide groove extending along the direction of the rotating shaft, the operating piece is connected with a sliding block, and the sliding block is positioned in the guide groove to move in a guiding manner.

As a preferable scheme of the hoisting device of the present invention, wherein: a bearing is further arranged at the opening of the accommodating cavity, an outer ring of the bearing is fixedly connected with the fitting piece, and an inner ring of the bearing is provided with a through groove for the limiting block to pass through;

when the limiting block is separated from the limiting groove, the limiting block is positioned in the through groove.

As a preferable scheme of the hoisting device of the present invention, wherein: the containing cavity comprises a first cavity and a second cavity, the limiting groove is located on the inner wall of the first cavity, the inner diameter of the second cavity is larger than the distance between the limiting blocks on the two sides of the operating piece, and the bearing is located at the opening of the second cavity.

As a preferable scheme of the hoisting device of the present invention, wherein: the limiting blocks are in a straight tooth shape and are uniformly distributed along the circumferential direction of the operating piece corresponding to the limiting grooves;

and the inner wall of the second cavity is also provided with a spring bead which is positioned between two adjacent limiting blocks.

As a preferable scheme of the hoisting device of the present invention, wherein: a tension spring connected with the operating part is further arranged in the accommodating cavity, and the pre-tightening force of the tension spring enables the limiting block to be embedded and connected with the limiting groove;

wherein, the slider is also connected with a lifting hook.

The invention also aims to provide a reaction kettle for catalysis, wherein the upper part of the reaction kettle is provided with any one of the hoisting devices;

wherein, reation kettle with the connecting piece is fixed to be connected to each other.

The invention has the beneficial effects that: the connecting piece can freely rotate around the rotating shaft, and meanwhile, the rotation of the connecting piece is limited by the limiting assembly so as to lock a proper angle adjusted by an object to be hoisted; through the structural design of the invention, the connecting piece can be switched between locking and free rotation at any time, which is beneficial to searching the optimal installation angle and installation position of large equipment such as a reaction kettle.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic view of the overall structure of the hoisting device of the present invention;

fig. 2 is a schematic view of the overall structure of the suspension member of the present invention;

FIG. 3 is a schematic view of the connection between the suspending element, the fitting element and the operating element according to the present invention;

FIG. 4 is a schematic half-section view of FIG. 3;

FIG. 5 is a schematic view of the operating member of FIG. 4 shown after being moved upward;

FIG. 6 is a schematic structural diagram of an operating member according to the present invention;

FIG. 7 is a schematic half-section view of a mating member of the present invention;

FIG. 8 is a schematic view of the construction of the top bearing of the mating member of the present invention;

FIG. 9 is a schematic view of the overall structure of the catalytic reactor of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1 to 2, a first embodiment of the present invention provides a hoisting device, which includes a suspension element 100 and a connection element 200, wherein the suspension element 100 is used to connect to a spreader, it should be noted that the suspension element 100 cannot rotate through the spreader, and the connection element 200 is used to connect to an object to be hoisted;

the hanging piece 100 is provided with a rotating shaft 101, the connecting piece 200 is connected with the hanging piece 100, the hanger lifts the connecting piece 200 through the hanging piece 100, the connecting piece 200 is rotatably connected with the rotating shaft 101, and the connecting piece 200 can rotate around the rotating shaft 101 so as to adjust the angle of an object to be lifted;

specifically, the suspension member 100 includes a rotating shaft 101, a stop disc 102, a base member 103 and a lifting hook 104, the base member 103, the rotating shaft 101 and the stop disc 102 are sequentially and fixedly connected from top to bottom, the stop disc 102 has a certain diameter, the connecting member 200 is placed on the stop disc 102, and after the lifting appliance is connected with the lifting hook 104, the connecting member 200 can be lifted through the stop disc 102.

It should be noted that, the suspension member 100 is further provided with a limiting assembly 300, the limiting assembly 300 is used for limiting the rotation of the connection member 200, and after the object to be hoisted is adjusted to a proper angle, the position needs to be maintained, and at this time, the limiting assembly 300 limits the rotation of the connection member 200, so as to fix the position.

Specifically, the limiting assembly 300 includes an operating element 301 located on the suspending element 100 and a fitting element 302 located on the connecting element 200, the fitting element 302 is fixed with the connecting element 200, the operating element 301 is provided with a first connecting structure, the first connecting structure is located at a circumferential position of the rotating shaft 101, and the fitting element 302 is provided with a second connecting structure;

wherein the first connecting structure and the second connecting structure can contact each other at a circumferential position of the rotating shaft 101; after the first connection structure and the second connection structure are contacted with each other, because the first connection structure is located at the circumferential position of the rotating shaft 101, the connecting piece 200 can be prevented from rotating around the rotating shaft 101, and the rotation of the connecting piece 200 is limited, and in order to limit the connecting piece 200 in two circumferential directions, the second connection structure can be contacted with the first connection structure in the front and back directions in the circumferential direction;

it should be noted that the operating member 301 can move to separate the first connecting structure and the second connecting structure from each other along the axial direction of the rotating shaft 101, and at this time, the first connecting structure and the second connecting structure are not in contact at the circumferential position of the rotating shaft 101, and at this time, the connecting member 200 can rotate around the rotating shaft 101.

Example 2

Referring to fig. 3 to 6, this embodiment is different from the first embodiment in that: the operating element 301 is tubular and sleeved outside the rotating shaft 101, the first connecting structure is a limiting block 301a arranged outside the operating element 301, the limiting block 301a extends axially along the rotating shaft 101, and the limiting block 301a is located at the circumferential position of the rotating shaft 101.

The fitting piece 302 is provided with an accommodating cavity N1, one end of the accommodating cavity N1 is open, the operating piece 301 can enter the accommodating cavity N1 through the opening, the second connecting structure is a limiting groove 302a arranged on the inner wall of the accommodating cavity N1, the limiting groove 302a extends along the direction of the rotating shaft 101, the limiting groove 302a is also formed at the open end of the accommodating cavity N1, and the first connecting structure moving along with the operating piece 301 can enter the limiting groove 302a through the opening; wherein, the limiting block 301a is connected with the limiting groove 302a in an embedding manner; when the limiting block 301a is inserted into the limiting groove 302a, the engaging member 302 and the connecting member 200 fixed to the engaging member 302 are restricted from rotating.

As described above, it should be understood by those skilled in the art that a structure similar to the above-described structure is also within the scope of the present application, for example, the limiting groove 302a is provided on the outer side of the operating member 301, and the limiting block 301a capable of being in embedded connection with the limiting groove 302a is provided on the inner wall of the accommodating chamber N1.

Wherein, the operation member 301 can move along the rotating shaft 101 to make the limiting block 301a disengage from the limiting groove 302a from the opening, and the connecting member 200 can rotate freely after there is no contact between the limiting block 301a and the limiting groove 302 a.

In order to realize that the operating element 301 can move along the rotating shaft 101, the suspension 100 is provided with a guide groove N2 extending along the rotating shaft 101, the operating element 301 is connected with a slide block 301b, and the slide block 301b is positioned in the guide groove N2 to guide and move.

Specifically, the size of the base member 103 is larger than that of the rotating shaft 101, the guide groove N2 is opened on the base member 103 and forms an opening on the lower end surface of the base member 103, the slider 301b is located in the axial direction of the operating member 301, the slider 301b passes through the opening and enters the guide groove N2, and during the movement of the operating member 301, the slider 301b is always located in the guide groove N2.

In order to improve the moving stability of the sliding block 301b, a limiting piece 105 is further arranged on the base member 103, and the limiting piece 105 limits the sliding block 301b to move in the guide groove N2; the base member 103 may be in a cylindrical shape, the limiting member 105 is in a ring shape sleeved outside the base member 103, and the slider 301b is located between the base member 103 and the limiting member 105 to move.

Example 3

As can be seen from embodiment 2, since the connector 200 needs to be rotated around the rotating shaft 101 to adjust the angle, and the limiting groove 302a rotates synchronously with the connector 200, the limiting groove 302a may not correspond to the limiting block 301a in the axial position, which may result in that the limiting block 301a may not enter the limiting groove 302a, and the angle of the connector 200 may not be locked.

Thus, referring to fig. 3 to 7, this embodiment differs from the above embodiment in that: the limiting grooves 302a are evenly distributed on the inner wall of the accommodating chamber N1 in the circumferential direction of the rotating shaft 101.

Through the plurality of limiting grooves 302a, the fault tolerance rate can be improved, the more the number of the limiting grooves 302a is, the higher the fault tolerance rate is, and only a small angle needs to be rotated, so that the limiting blocks 301a and one of the limiting grooves 302a can be ensured to be mutually corresponding in the axial position, and compared with embodiment 2, the operation is obviously more convenient.

Example 4

Referring to fig. 3 to 8, this embodiment is different from the above embodiment in that: a bearing 302b is further arranged at the opening of the accommodating cavity N1, an outer ring 302b-1 of the bearing 302b is fixedly connected with the fitting piece 302, and an inner ring 302b-2 of the bearing 302b is provided with a through groove N3 for the limiting block 301a to pass through; when the limiting block 301a is disengaged from the limiting groove 302a, the limiting block 301a is located in the through groove N3, at this time, the inner ring 302b-2 of the bearing 302b is connected with the limiting block 301a and the operating element 301, the inner ring 302b-2 of the bearing 302b cannot circumferentially rotate relative to the operating element 301, but at this time, the mating member 302 and the outer ring 302b-1 of the bearing 302b can circumferentially rotate relative to the operating element 301 around the rotating shaft 101.

The limiting block 301a has a certain axial length, when the operating element 301 moves, the limiting block 301a is always located in the through groove N3, and when the limiting block 301a extends into the limiting groove 302a, the limiting block 301a is still located in the through groove N3, at this time, the mating element 302 cannot rotate circumferentially relative to the operating element 301, and cannot rotate around the rotating shaft 101, so that the purpose of locking the rotating angle of the connecting element 200 is achieved.

It should be noted that the accommodating cavity N1 comprises a first cavity N1-a and a second cavity N1-b, the limiting groove 302a is positioned on the inner wall of the first cavity N1-a, the inner diameter of the second cavity N1-b is larger than the distance between the limiting blocks 301a on the two sides of the operating member 301, and the bearing 302b is positioned at the opening of the upper end of the second cavity N1-b;

when the operating member 301 moves upward as a whole, the limiting block 301a disengages from the limiting slot 302a and enters the second chamber N1-b, and at this time, the inner wall of the second chamber N1-b does not contact the limiting block 301a of the operating member 301, so that the operating member 301 can rotate freely relative to the second chamber N1-b, that is, the mating member 302 can rotate freely around the rotating shaft 101.

Example 5

Referring to fig. 3 to 8, this embodiment is different from the above embodiment in that: the limiting blocks 301a are uniformly distributed along the circumferential direction of the operating piece 301, the number of the limiting blocks 301a is the same as that of the limiting grooves 302a, the limiting blocks 301a are in a straight tooth shape, and the limiting blocks 301a form a structure similar to a gear;

wherein, the inner wall of the second chamber N1-b is also provided with a spring bead 302c, and the spring bead 302c is positioned between two adjacent limiting blocks 301 a; during the synchronous rotation of the delimiting groove 302a with the fitting piece 302, the fitting piece 302 can be rotated once at the angle of a single tooth by the action of the spring ball 302c, ensuring that the angle of each rotation is fixed, so that the delimiting groove 302a always corresponds to the axial position of the delimiting block 301a during the rotation.

Specifically, the spring ball 302c can adopt the means of the prior art, the side wall of the fitting piece 302 is provided with a mounting hole, the spring ball 302c comprises a ball 302c-1, an elastic piece 302c-2 and an adjusting block 302c-3 which are positioned in the mounting hole, the ball 302c-1 slides in the mounting hole and is positioned between two adjacent limiting blocks 301a of the gear, and the elastic piece 302c-2 is connected between the ball 302c-1 and the adjusting block 302 c-3; when the highest position of the limiting block 301a contacts the ball 302c-1, the ball 302c-1 is pushed to compress the elastic member 302c-2 to move, and when the lowest position of the limiting block 301a is contacted, the elastic member 302c-2 pushes the ball 302c-1 to reset, and so on, so as to ensure that the angle of each rotation is fixed;

the adjusting block 302c-3 is in threaded connection with the mounting hole, the pretightening force of the elastic piece 302c-2 can be adjusted by rotating the adjusting block 302c-3, and the rotating force of the fitting piece 302 can be adjusted.

Example 6

Referring to fig. 3 to 8, this embodiment is different from the above embodiment in that: a tension spring 302d connected with the operating piece 301 is further arranged in the accommodating cavity N1, and the limiting block 301a is connected with the limiting groove 302a in an embedded mode through the pretightening force of the tension spring 302 d; only by moving the operation member 301 upwards by an external force, the operation member 301 overcomes the pre-tightening force of the tension spring 302d, so that the limiting block 301a is separated from the limiting groove 302a, and after the external force is removed, the operation member 301 is reset under the action of the tension spring 302d, and on the basis of embodiment 5, the limiting block 301a can rapidly enter the limiting groove 302a, so that the rotation angle of the connecting member 200 can be rapidly locked.

It should be noted that the slider 301b is further connected with a hook 301c, the hook 301c is connected with a second hanger, and the slider 301b and the operating member 301 are operated by the second hanger to move axially, so that the connecting member 200 is switched between locking and free rotation.

Example 7

Referring to fig. 1 to 9, in this embodiment, a catalytic reaction kettle is provided, and a hoisting device as described in any one of the above embodiments is disposed at an upper portion of the reaction kettle 400; wherein, reaction kettle 400 is fixedly connected with connecting piece 200.

Connecting piece 200 includes connecting arm 201 and mounting 202, and wherein, fitting 302 is located the middle part, and connecting arm 201 symmetry sets up in the both sides of fitting 302, and mounting 202 is located connecting arm 201 respectively, and simultaneously, reation kettle 400 upper portion is equipped with the mount pad, and mounting 202 is fixed continuous with the mount pad.

Wherein, the fixing part 202 can move on the connecting arm 201 to adjust the installation position, and simultaneously ensure that the axis of the rotating shaft 101 connected with the fitting part 302 is positioned on the same straight line with the axis or the gravity center of the reaction kettle 400.

The working principle of the invention is as follows:

when the reaction kettle 400 needs to be lifted, the lifting hook 104 is connected with the first lifting appliance, the lifting hook 301c is connected with the second lifting appliance, the reaction kettle 400 is lifted integrally through the first lifting appliance, when the reaction kettle 400 needs to be rotated to adjust the angle, the operating part 301 is moved upwards through the second lifting appliance, the pretightening force of the tension spring 302d is overcome, the limiting block 301a is separated from the limiting groove 302a, the limiting block 301a enters the second cavity N1-b, at the moment, the inner wall of the second cavity N1-b cannot be contacted with the limiting block 301a on the operating part 301, the operating part 301 can freely rotate relative to the second cavity N1-b, namely, the engaging part 302 can freely rotate around the rotating shaft 101 at the moment; the fitting piece 302 is rotated once at the angle of a single tooth by the action of the spring ball 302c, and the angle of each rotation is ensured to be fixed, so that the limiting groove 302a always corresponds to the axial position of the limiting block 301a in the rotation process;

when the rotation angle needs to be locked, the second lifting appliance moves downwards, the upward external force on the hook 301c is removed, the operating element 301 is reset under the action of the tension spring 302d, the limiting block 301a enters the limiting groove 302a quickly, and the rotation angle of the connecting piece 200 is locked quickly.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A hoisting device is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the suspension piece (100), wherein a rotating shaft (101) is arranged on the suspension piece (100); and the number of the first and second groups,

the connecting piece (200), the connecting piece (200) is connected with the suspension piece (100), and the connecting piece (200) is rotatably connected with the rotating shaft (101);

wherein, the suspension piece (100) is further provided with a limiting component (300), and the limiting component (300) is used for limiting the rotation of the connecting piece (200);

the limiting assembly (300) comprises an operating piece (301) positioned on the suspension piece (100) and a matching piece (302) positioned on the connecting piece (200), wherein a first connecting structure is arranged on the operating piece (301), and a second connecting structure is arranged on the matching piece (302);

wherein the first connecting structure and the second connecting structure are capable of contacting each other at a circumferential position of the rotating shaft (101);

wherein the operating member (301) is movable to disengage the first and second connecting structures from each other in an axial direction of the rotating shaft (101).

2. The hoisting device of claim 1, wherein: the operating part (301) is tubular and sleeved outside the rotating shaft (101), and the first connecting structure is a limiting block (301 a) arranged outside the operating part (301); the mating piece (302) is provided with an accommodating cavity (N1), the second connecting structure is a limiting groove (302 a) arranged on the inner wall of the accommodating cavity (N1), and the limiting groove (302 a) extends along the direction of the rotating shaft (101);

wherein the limiting block (301 a) is connected with the limiting groove (302 a) in an embedding manner;

wherein the operating member (301) can move along the rotating shaft (101) to disengage the limiting block (301 a) from the limiting groove (302 a).

3. The hoisting device of claim 2, wherein: the limiting grooves (302 a) are uniformly distributed on the inner wall of the accommodating cavity (N1) along the circumferential direction of the rotating shaft (101).

4. The hoisting device of claim 2 or 3, wherein: the suspension piece (100) is provided with a guide groove (N2) extending along the direction of the rotating shaft (101), the operating piece (301) is connected with a sliding block (301 b), and the sliding block (301 b) is located in the guide groove (N2) to move in a guiding mode.

5. The hoisting device of claim 4, wherein: a bearing (302 b) is further arranged at an opening of the accommodating cavity (N1), an outer ring (302 b-1) of the bearing (302 b) is fixedly connected with the fitting piece (302), and an inner ring (302 b-2) of the bearing (302 b) is provided with a through groove (N3) for the limiting block (301 a) to pass through;

wherein, when the limiting block (301 a) is disengaged from the limiting groove (302 a), the limiting block (301 a) is positioned in the through groove (N3).

6. The hoisting device of claim 5, wherein: the containing cavity (N1) comprises a first cavity (N1-a) and a second cavity (N1-b), the limiting groove (302 a) is positioned on the inner wall of the first cavity (N1-a), the inner diameter of the second cavity (N1-b) is larger than the distance between the limiting blocks (301 a) on the two sides of the operating member (301), and the bearing (302 b) is positioned at the opening of the second cavity (N1-b).

7. The hoisting device of claim 6, wherein: the limiting blocks (301 a) are in a straight tooth shape, and the limiting blocks (301 a) and the limiting grooves (302 a) are uniformly distributed along the circumferential direction of the operating piece (301);

wherein, the inner wall of the second cavity (N1-b) is also provided with a spring bead (302 c), and the spring bead (302 c) is positioned between two adjacent limiting blocks (301 a).

8. The hoisting device of claim 7, wherein: a tension spring (302 d) connected with the operating piece (301) is further arranged in the accommodating cavity (N1), and the limiting block (301 a) is connected with the limiting groove (302 a) in an embedded manner through the pretightening force of the tension spring (302 d);

wherein, the slider (301 b) is also connected with a hook (301 c).

9. A reaction kettle for catalysis is characterized in that: the upper part of the reaction kettle (400) is provided with the hoisting device as set forth in any one of claims 1-8;

wherein, reation kettle (400) with connecting piece (200) are fixed links to each other.