Dry quenching coke tank inclination early warning device

Abstract

The invention belongs to the field of enterprise informatization evaluation, and provides a dry quenching coke tank inclination early warning device which comprises a detection frame, an outer gear disc is mounted in the detection frame, and a driving mechanism is mounted in the detection frame on one side of the outer gear disc; the detection mechanism is mounted on the inner wall of the outer gear disc; the detection mechanism comprises a support connected to the inner wall of the outer gear disc, a plurality of magnetic proximity switches are installed on the support, and metal contact pieces are installed on the inner walls, close to the detection frame, of the magnetic proximity switches. The magnetic blocks are mounted on the peripheries of the dry quenching coke tank and the coke tank cover; after the magnetic block is mounted on the periphery of the dry quenching coke tank, the outer gear disc is used for driving the detection mechanism to rotate around the periphery of the dry quenching coke tank, and surrounding scanning detection early warning is performed on the dry quenching coke tank under the mutual cooperation of the outer gear disc and the early warning mechanism; therefore, a user can quickly judge the inclination position of the dry quenching coke tank and timely correct the dry quenching coke tank.

Description

Technical Field

[0001] The invention belongs to the field of enterprise informationization assessment, in particular to a dry coke quenching coke tank tilting early warning device. Background Art

[0002] In the CDQ process, the coke drum is a key device for carrying high-temperature coke. Its stability and safety are directly related to the smooth progress of the entire production process and the safety of operators. The CDQ process involves high temperature, high pressure and fast-moving mechanical parts, so the monitoring and control of the coke drum is particularly important.

[0003] However, traditional CDQ coke drum monitoring methods often rely on manual inspections and empirical judgments, which is not only inefficient but also difficult to capture the tilt or skew state of the coke drum in real time and accurately. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a dry quenching coke drum tilt warning device to solve the problem that traditional dry quenching coke drum monitoring methods in the prior art often rely on manual inspections and experience judgments, which is not only inefficient but also difficult to capture the tilt or skew state of the coke drum in real time and accurately.

[0005] A dry quenching coke tank tilt warning device, comprising:

[0006] A detection frame, wherein an external gear plate is installed inside the detection frame, a driving mechanism is installed inside the detection frame on one side of the external gear plate, and a plurality of mounting seats are installed on the outer wall of the detection frame;

[0007] A detection mechanism, the detection mechanism being mounted on the inner wall of the outer gear plate;

[0008] The detection mechanism comprises a bracket connected to the inner wall of the outer gear plate, a plurality of magnetic proximity switches are installed on the bracket, and a metal contact piece is installed near the inner wall of the detection frame of the magnetic proximity switch;

[0009] A magnetic block, wherein the magnetic block is installed on the periphery of the CDQ coke tank and the coke tank cover;

[0010] An early warning mechanism, which is installed around the inside of the detection frame;

[0011] The warning mechanism includes a shell installed inside the detection frame, a plurality of springs are installed inside the shell, a plurality of metal seats are connected to one end of the spring close to the detection mechanism, and a plurality of warning indicator lights are installed at one end of the shell away from the detection mechanism.

[0012] Preferably, the early warning mechanism further comprises a control circuit board installed inside the housing, and the upper end of the control circuit board is connected to a delay circuit board.

[0013] Preferably, the early warning mechanism further comprises a conductive bump, and the metal seat is close to the conductive bump at one end of the detection mechanism.

[0014] Preferably, the conductive protrusion passes through the shell and extends into the inner circle of the detection frame, and the conductive protrusion is located at the same horizontal position as the metal contact piece.

[0015] Preferably, the driving mechanism comprises a motor installed inside the detection frame, the output end of the motor is connected to a transmission gear, and the transmission gear is meshed with an outer gear table of an outer gear plate.

[0016] Preferably, an assembly groove for assembling the external gear disc is provided inside the detection frame, and a bearing seat is installed on the periphery of the external gear disc inside the assembly groove.

[0017] Preferably, a wireless controller is installed on one side of the detection frame, and the wireless controller is electrically connected to the driving mechanism, the detection mechanism and the early warning mechanism through wires.

[0018] Preferably, a dual-axis inclination sensor is installed on the surface of the detection frame, and the dual-axis inclination sensor is electrically connected to the wireless controller via a wire.

[0019] Preferably, the mounting seat is provided with a plurality of mounting holes.

[0020] Preferably, a hoist connecting seat is installed on the top of the mounting seat, the hoist connecting seat and the mounting seat are connected by a connecting bolt, and a connecting hole is opened inside the hoist connecting seat.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention installs a magnetic block on the periphery of the dry coke quenching coke tank, and uses an external gear plate to drive the detection mechanism to rotate around the periphery of the dry coke quenching coke tank. In cooperation with the early warning mechanism, the dry coke quenching coke tank is scanned around for detection and early warning, so that users can quickly determine the tilt position of the dry coke quenching coke tank and make corrections in time.

[0023] 2. The present invention installs the magnetic block on the coke tank cover. At this time, the connecting bolt is used to pass through the installation holes on the elevator connecting seat and the mounting seat, the elevator connecting seat is assembled on the mounting seat, and the elevator connecting seat is assembled on the elevator compatible with the dry coke quenching coke tank through the connecting hole, thereby realizing continuous monitoring during the process of hoisting and moving the dry coke quenching coke tank through the coke tank cover using the elevator, and judging whether the dry coke quenching coke tank is tilted.

[0024] 3. The present invention is equipped with a control circuit board, and when in use, the circuit formed by the detection mechanism and the early warning mechanism can be controlled by the control circuit board, and the time when the early warning indicator light turns on can be controlled by the delay circuit board. The delay time is less than the time taken for the detection mechanism to rotate one circle, so that the user can observe the early warning indicator light. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 is a side view of the present invention;

[0027] Figure 3 is a cross-sectional view of the detection frame of the present invention;

[0028] Figure 4 It is a schematic diagram of the side section structure of the detection frame of the present invention;

[0029] Figure 5 It is a cross-sectional view of the detection frame and the bearing seat of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the driving mechanism and the detection mechanism of the present invention;

[0031] Figure 7 is a cross-sectional view of the early warning mechanism of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the detection frame and the lifting machine connecting seat of the present invention.

[0033] In the figure:

[0034] 1. Detection frame; 2. External gear plate; 3. Driving mechanism; 301. Motor; 302. Transmission gear; 4. Detection mechanism; 401. Bracket; 402. Magnetic proximity switch; 403. Metal contact; 5. Magnetic block; 6. Warning mechanism; 601. Shell; 602. Warning indicator light; 603. Metal seat; 604. Spring; 605. Control circuit board; 606. Delay circuit board; 607. Conductive bump; 7. Bearing seat; 8. Mounting seat; 9. Wireless controller; 10. Dual-axis inclination sensor; 11. Hoist connecting seat; 12. Connecting bolt; 13. Connecting hole. DETAILED DESCRIPTION

[0035] 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 accompanying drawings.

[0036] 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.

[0037] 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.

[0038] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 As shown:

[0039] Embodiment 1: The present invention provides a CDQ coke tank tilt warning device, comprising:

[0040] A detection frame 1, an outer gear plate 2 is installed inside the detection frame 1, a driving mechanism 3 is installed inside the detection frame 1 on one side of the outer gear plate 2, and a plurality of mounting seats 8 are installed on the outer wall of the detection frame 1;

[0041] A detection mechanism 4, which is mounted on the inner wall of the outer gear plate 2;

[0042] The detection mechanism 4 includes a bracket 401 connected to the inner wall of the outer gear plate 2, a plurality of magnetic proximity switches 402 are installed on the bracket 401, and a metal contact piece 403 is installed near the inner wall of the detection frame 1 of the magnetic proximity switch 402;

[0043] Magnetic block 5, which is installed on the periphery of the CDQ coke tank and the coke tank cover;

[0044] The early warning mechanism 6 is installed around the inside of the detection frame 1;

[0045] The warning mechanism 6 includes a shell 601 installed inside the detection frame 1, and a plurality of springs 604 are installed inside the shell 601. The end of the spring 604 close to the detection mechanism 4 is connected to a plurality of metal seats 603, and the end of the shell 601 away from the detection mechanism 4 is installed with a plurality of warning indicator lights 602.

[0046] The metal contact piece 403 is in a normally open state, and the spring 604 can be automatically compressed when the metal seat 603 is squeezed, and push the metal seat 603 to reset when the metal seat 603 loses pressure.

[0047] As can be seen from the above, the device installs the detection frame 1 on a transport vehicle for transporting the dry quenching coke tank or a supporting structure of the dry quenching coke tank through the mounting seat 8. At this time, the detection frame 1 is mounted on the periphery of the dry quenching coke tank, and the magnetic block 5 is mounted around the periphery of the dry quenching coke tank vehicle. The magnetic block 5 and the metal contact piece 403 are at the same horizontal position, and the position of the metal contact piece 403 corresponds to the position of the early warning mechanism 6. After the assembly is completed, the device is connected to an external power supply, and the device starts to run after being powered on;

[0048] After the driving mechanism 3 is powered on, it provides power to the outer gear disc 2, and the outer gear disc 2 starts to rotate at a uniform speed inside the detection frame 1. During the rotation, the outer gear disc 2 also drives the detection mechanism 4 to rotate around the periphery of the dry coke quenching coke tank. During the rotation of the detection mechanism 4, the bracket 401 drives the magnetic proximity switch 402 and the metal contact 403 to move simultaneously. When the magnetic proximity switch 402 detects the magnetic block 5 during the movement, the magnetic proximity switch 402 is in a closed state. At the same time, after the metal contact 403 contacts the metal seat 603, a complete closed circuit is formed between the detection mechanism 4 and the early warning mechanism 6. The early warning indicator 602 corresponding to the position of the metal contact 403 is powered on and lights up. When the bracket 401 moves out of the position between the magnetic block 5 and the early warning mechanism 6, the circuit is disconnected and the early warning indicator 602 is off. By analogy, it can be judged that during the operation of the device, when the early warning indicator 602 at a certain place is off for a long time, it can be judged that the dry coke quenching coke tank has tilted in a certain direction, thereby realizing early warning.

[0049] In this embodiment, after the magnetic block 5 is installed on the periphery of the dry quenching coke tank, the detection mechanism 4 is driven by the outer gear plate 2 to rotate around the periphery of the dry quenching coke tank, and the dry quenching coke tank is scanned and detected in cooperation with the early warning mechanism 6 to provide an early warning, so that the user can quickly determine the tilt position of the dry quenching coke tank and make corrections in time.

[0050] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 7 As shown:

[0051] Specifically, regarding the above-mentioned warning mechanism 6, the warning mechanism 6 also includes a control circuit board 605 installed inside the housing 601, and the upper end of the control circuit board 605 is connected to a delay circuit board 606;

[0052] The early warning mechanism 6 also includes a conductive bump 607, and the conductive bump 607 at one end of the metal seat 603 is close to the detection mechanism 4;

[0053] The conductive protrusion 607 penetrates the housing 601 and extends into the inner circle of the detection frame 1 . The conductive protrusion 607 and the metal contact piece 403 are at the same horizontal position.

[0054] The conductive protrusion 607 is an arc-shaped structure, and the vertical position of the metal contact piece 403 is located between the vertical positions of adjacent warning indicator lights 602 .

[0055] As can be seen from the above, when the metal contact 403 rotates to the position of the conductive protrusion 607, the metal contact 403 will squeeze the conductive protrusion 607 to ensure that the metal contact 403 and the conductive protrusion 607 are in contact, thereby forming a complete circuit between the detection mechanism 4 and the early warning mechanism 6 to achieve power transmission. The circuit formed by the detection mechanism 4 and the early warning mechanism 6 can be controlled by the control circuit board 605, and the time when the early warning indicator light 602 lights up can be controlled by the delay circuit board 606. The delay time is less than the time taken for the detection mechanism 4 to rotate one circle, so that the user can observe the early warning indicator light 602.

[0056] As attached Figure 3 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 6 As shown:

[0057] Specifically, regarding the above-mentioned driving mechanism 3 , the driving mechanism 3 includes a motor 301 installed inside the detection frame 1 , and the output end of the motor 301 is connected to a transmission gear 302 , and the transmission gear 302 is meshed with the outer gear table of the outer gear plate 2 .

[0058] The detection frame 1 has an installation space inside to meet the needs of assembly and rotation of the driving mechanism 3 .

[0059] As can be seen from the above, during the operation of the motor 301, its output end drives the transmission gear 302 to rotate. During the rotation of the transmission gear 302, the outer gear table on the periphery of the outer gear plate 2 drives the outer gear plate 2 to rotate simultaneously inside the detection frame 1, thereby automatically driving the detection mechanism 4 to rotate and move around the periphery of the dry coke quenching tank, saving manpower.

[0060] As attached Figure 3 , Attachment Figure 4 and attached Figure 5 As shown:

[0061] Specifically, regarding the above-mentioned detection frame 1, an assembly groove for assembling the external gear plate 2 is opened inside the detection frame 1, and a bearing seat 7 is installed on the periphery of the external gear plate 2 inside the assembly groove.

[0062] It can be seen from the above that the bearing seat 7 can limit the position of the outer gear plate 2 inside the assembly groove without affecting the rotation of the outer gear plate 2 inside the detection frame 1, so that the operation of the outer gear plate 2 is more stable.

[0063] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 5 As shown:

[0064] Specifically, regarding the above-mentioned detection frame 1, a wireless controller 9 is installed on one side of the detection frame 1, and the wireless controller 9 is electrically connected to the driving mechanism 3, the detection mechanism 4 and the early warning mechanism 6 through wires;

[0065] A dual-axis tilt sensor 10 is installed on the surface of the detection frame 1 , and the dual-axis tilt sensor 10 is electrically connected to the wireless controller 9 through a wire.

[0066] As can be seen from the above, the dual-axis inclination sensor 10 can detect the assembly angle of the detection frame 1 when in use, and transmit the detected data to the inside of the wireless controller 9 for analysis and recording, so that the detection frame 1 can always maintain a horizontal state, avoiding the situation where the dry quenching coke tank is detected to be tilted due to the tilt of the detection frame 1 itself, thereby improving the accuracy of detection. While analyzing and recording the data detected by the device, the wireless controller 9 uploads the obtained data to the terminal, so as to remotely obtain the state of the dry quenching coke tank and optimize the use process.

[0067] The working principle of this embodiment is as follows: the detection frame 1 is mounted on a transport vehicle for transporting the dry quenching coke tank or a supporting structure of the dry quenching coke tank through the mounting seat 8. At this time, the detection frame 1 is sleeved on the periphery of the dry quenching coke tank, and the magnetic block 5 is mounted around the periphery of the dry quenching coke tank vehicle, and the magnetic block 5 and the metal contact sheet 403 are at the same horizontal position;

[0068] After the driving mechanism 3 is powered on, it provides power to the outer gear disc 2. During the operation of the motor 301, its output end drives the transmission gear 302 to rotate. During the rotation of the transmission gear 302, the outer gear table on the outer periphery of the outer gear disc 2 is used to drive the outer gear disc 2 to rotate simultaneously inside the detection frame 1. The outer gear disc 2 begins to rotate at a uniform speed inside the detection frame 1. During the rotation, the outer gear disc 2 simultaneously drives the detection mechanism 4 to rotate around the periphery of the dry coke quenching tank. During the rotation of the detection mechanism 4, the bracket 401 drives the magnetic proximity switch 402 and the metal contact sheet 403 to move simultaneously. When the magnetic proximity switch 402 detects the magnetic block 5 during the movement, the magnetic proximity switch 402 is in a closed state.

[0069] At the same time, when the metal contact piece 403 rotates to the position of the conductive protrusion 607, the metal contact piece 403 will squeeze the conductive protrusion 607 to ensure that the metal contact piece 403 and the conductive protrusion 607 are in contact, so that a complete circuit is formed between the detection mechanism 4 and the early warning mechanism 6 to realize the transmission of power. The circuit formed by the detection mechanism 4 and the early warning mechanism 6 can be controlled by the control circuit board 605, and the time when the early warning indicator light 602 lights up can be controlled by the delay circuit board 606. The delay time is less than the time used by the detection mechanism 4 to rotate one circle, so that the user can observe the early warning indicator light 602;

[0070] When the bracket 401 is moved out from the position between the magnetic block 5 and the warning mechanism 6, the circuit is disconnected and the warning indicator light 602 goes out. By analogy, during the operation of the device, when the warning indicator light 602 at a certain place is off for a long time, it can be judged that the CDQ tank is tilted in a certain direction, thereby realizing early warning.

[0071] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 8 As shown:

[0072] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that a plurality of mounting holes are provided on the mounting seat 8;

[0073] A hoist connecting seat 11 is installed on the top of the mounting seat 8 . The hoist connecting seat 11 is connected to the mounting seat 8 via a connecting bolt 12 . A connecting hole 13 is provided inside the hoist connecting seat 11 .

[0074] Among them, when the magnetic block 5 is installed on the coke tank cover, at this time, the connecting bolt 12 is used to pass through the mounting holes on the elevator connecting seat 11 and the mounting seat 8, and the elevator connecting seat 11 is assembled on the mounting seat 8, and the connecting hole 13 is used to assemble the elevator connecting seat 11 on the elevator compatible with the dry quenching coke tank, so that the detection mechanism 4, the magnetic block 5 and the early warning mechanism 6 are also in a horizontal state.

[0075] As can be seen from the above, after the assembly is completed, when the hoist is lifting and moving the coke tank cover, the connecting hole 13 is driven by the hoist to move upward at the same time, and the driving mechanism 3 is used to drive the outer gear plate 2 to rotate. The detection mechanism 4 is driven by the outer gear plate 2 to perform rotational movement detection around the coke tank cover, thereby realizing continuous monitoring during the process of lifting and moving the dry coke quenching coke tank through the coke tank cover by using the hoist to judge whether the dry coke quenching coke tank is tilted.

[0076] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0077] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0078] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0079] 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 CDQ coke tank tilt warning device, characterized in that: include: A detection frame (1), wherein an external gear plate (2) is installed inside the detection frame (1), a driving mechanism (3) is installed inside the detection frame (1) on one side of the external gear plate (2), and a plurality of mounting seats (8) are installed on the outer wall of the detection frame (1); A detection mechanism (4), wherein the detection mechanism (4) is mounted on the inner wall of the outer gear plate (2); The detection mechanism (4) comprises a bracket (401) connected to the inner wall of the outer gear plate (2), a plurality of magnetic proximity switches (402) are installed on the bracket (401), and a metal contact piece (403) is installed on the magnetic proximity switch (402) near the inner wall of the detection frame (1); A magnetic block (5), the magnetic block (5) being mounted on the periphery of the CDQ coke tank and the coke tank cover; An early warning mechanism (6), the early warning mechanism (6) being installed around the inside of the detection frame (1); The warning mechanism (6) comprises a shell (601) installed inside the detection frame (1), a plurality of springs (604) are installed inside the shell (601), one end of the spring (604) close to the detection mechanism (4) is connected to a plurality of metal seats (603), and a plurality of warning indicator lights (602) are installed at one end of the shell (601) away from the detection mechanism (4).

2. According to claim 1, a CDQ coke tank tilt warning device is characterized by: The early warning mechanism (6) further comprises a control circuit board (605) installed inside the housing (601), and the upper end of the control circuit board (605) is connected to a delay circuit board (606).

3. According to claim 2, a CDQ coke tank tilt warning device is characterized by: The early warning mechanism (6) further comprises a conductive bump (607), wherein the metal seat (603) is close to the conductive bump (607) at one end of the detection mechanism (4).

4. According to claim 3, a CDQ coke tank tilt warning device is characterized by: The conductive protrusion (607) penetrates the shell (601) and extends into the inner circle of the detection frame (1), and the conductive protrusion (607) is located at the same horizontal position as the metal contact sheet (403).

5. According to claim 1, a CDQ coke tank tilt warning device is characterized by: The driving mechanism (3) comprises a motor (301) installed inside the detection frame (1); the output end of the motor (301) is connected to a transmission gear (302); and the transmission gear (302) meshes with an outer gear table of the outer gear plate (2).

6. According to claim 1, a CDQ coke tank tilt warning device is characterized by: An assembly groove for assembling the external gear plate (2) is provided inside the detection frame (1), and a bearing seat (7) is installed on the periphery of the external gear plate (2) inside the assembly groove.

7. The CDQ coke tank tilt warning device according to claim 6, characterized in that: A wireless controller (9) is installed on one side of the detection frame (1), and the wireless controller (9) is electrically connected to the driving mechanism (3), the detection mechanism (4) and the early warning mechanism (6) via wires.

8. The CDQ coke tank tilt warning device according to claim 7, characterized in that: A dual-axis inclination sensor (10) is installed on the surface of the detection frame (1), and the dual-axis inclination sensor (10) is electrically connected to the wireless controller (9) via a wire.

9. The CDQ coke tank tilt warning device according to claim 1, characterized in that: The mounting seat (8) is provided with a plurality of mounting holes.

10. A CDQ coke tank tilt warning device according to any one of claims 1 to 9, characterized in that: A hoist connecting seat (11) is installed on the top of the mounting seat (8), the hoist connecting seat (11) and the mounting seat (8) are connected via a connecting bolt (12), and a connecting hole (13) is provided inside the hoist connecting seat (11).

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