A device for loading and unloading a stirring shaft coupling in a limited space

Abstract

The present invention provides a device for loading and unloading a stirring shaft coupling in a limited space. The device is easy to use and can efficiently and lightly load and unload the stirring coupling in a limited space. At the same time, the assembly accuracy is high, and the service life of the reducer, mechanical seal and agitator parts is extended. The device comprises: a driving mechanism, the driving mechanism comprises a hydraulic cylinder arranged at the lower end of a fixed seat, and the piston rod of the hydraulic cylinder is arranged toward the stirring shaft; a coupling fixing mechanism, the coupling fixing mechanism comprises a fixing bolt arranged at the lower end of the fixed seat, and an adjustable pressure block is provided on the fixing bolt and is matched with the thread of the fixing bolt. The adjustable pressure block can cooperate with the stirring shaft coupling to lock the stirring shaft coupling and the fixed seat together.

Description

Technical Field

[0001] The invention relates to the technical field of stirring devices, and in particular to a device for loading and unloading a stirring shaft coupling in a limited space. Background Art

[0002] In my country's biological, chemical, pharmaceutical, food and other projects, the number of various large-capacity reactors, fermentation tanks, mixing tanks, etc. is increasing, and their stirring power is also correspondingly large. There are higher requirements for the performance, reliability, durability, convenience, etc. of the stirring device. The higher the stirring power, the more abnormal faults will occur during the stirring process, and the service life and stirring effect of the stirrer will have a great impact on the production process and efficiency. Therefore, for large stirrers, in addition to requiring the performance selection of the reducer and the structural design and manufacturing of the stirrer itself to ensure its performance and quality, in large stirring devices, for stirrers, mechanical seals are key wearing parts. Its dynamic sealing function must not fail. Once the seal fails, the fermentation process will be contaminated with bacteria for the fermentation tank, and the fermentation failure will cause huge losses; for various reactors, it will cause toxic gases or flammable and explosive gases to leak, causing major accidents. Therefore, the probability of replacing and repairing mechanical seals for large stirrers is very high.

[0003] When replacing and repairing mechanical seals, the intermediate couplings and agitator shaft couplings of the associated agitator need to be disassembled one by one. Each piece is heavy and requires high assembly precision. The operating space on the tank top is small, and it is extremely inconvenient to disassemble and assemble the couplings. In particular, the agitator shaft coupling needs to bear the weight and torque of the agitator shaft and blades. The assembly precision is high and the gap is small. The force required for disassembly and assembly is large. The distance between the reducer coupling and the space is small, so the usual coupling disassembly and assembly tooling cannot be used. Moreover, it requires a lot of force to operate. Moreover, after reinstallation, it is not easy to reset, which will affect its assembly precision and make it impossible to guarantee the normal use of the agitator. During use, the installation precision of the agitator will gradually deteriorate, which greatly reduces the life of the reducer, mechanical seal and agitator parts, and gradually increases the failure rate. Summary of the invention

[0004] In response to the above problems, the present invention provides a device for loading and unloading a stirring shaft coupling in a limited space. The device is easy to use and can efficiently and easily load and unload the stirring coupling in a limited space. At the same time, it has high assembly precision, thereby extending the service life of the reducer, mechanical seal and agitator parts.

[0005] The technical solution is as follows: a device for loading and unloading a stirring shaft coupling in a limited space, characterized in that it includes:

[0006] A driving mechanism, the driving mechanism comprising a hydraulic cylinder arranged at the lower end of the fixing seat, the piston rod of the hydraulic cylinder being arranged toward the stirring shaft;

[0007] The coupling fixing mechanism comprises a fixing bolt arranged at the lower end of the fixing seat, and the fixing bolt is provided with an adjustable pressure block which cooperates with the thread of the fixing bolt, and the adjustable pressure block can cooperate with the stirring shaft coupling to lock the stirring shaft coupling and the fixing seat together.

[0008] Furthermore, the fixing seat is provided with a slide groove radiating outward from the center of the fixing seat, the slide groove is T-shaped, the fixing bolt is clamped in the slide groove through a nut that cooperates with the slide groove, and the screw rod of the fixing bolt is arranged downward to extend from the slide groove.

[0009] Furthermore, the nut of the fixing bolt is configured as a rectangular nut matching the slide groove.

[0010] Furthermore, a pressing sleeve is sleeved on the fixing bolt, and the adjustable pressing block can cooperate with the pressing sleeve to lock the stirring shaft coupling between the pressing sleeve and the adjustable pressing block.

[0011] Furthermore, at least two fixed bosses are provided on the outer side of the hydraulic cylinder, a lifting ring fixing plate is provided on the slide corresponding to the fixed bosses, a lifting ring fixing portion cooperating with the slide is provided on the upper end of the lifting ring fixing plate, a mounting connection portion is provided on the lower end of the lifting ring fixing plate extending out of the slide, a mounting hole is provided on the mounting connection portion corresponding to the fixed bosses, and the hydraulic cylinder is mounted on the lifting ring fixing plate through the fixed bosses cooperating with the mounting holes.

[0012] Furthermore, the mounting connection portion is also provided with a locking thread groove communicated with the mounting hole, and a locking bolt passes through the locking thread groove to fix a fixing boss located in the mounting hole.

[0013] Furthermore, a piston rod adjusting pad is provided at the front end of the piston rod.

[0014] Furthermore, it also includes a stirring shaft installation locking mechanism, which includes a pulling shaft plate, which cooperates with the adjustable pressure block through the pressure sleeve and is locked together with the fixed seat. A hydraulic cylinder limiting part is provided on the pulling shaft plate, and the hydraulic cylinder limiting part is abutted against the cylinder body of the hydraulic cylinder to limit the cylinder body of the hydraulic cylinder. An avoidance hole is provided on the pulling shaft plate corresponding to the piston rod of the hydraulic cylinder, and a bolt positioning hole is provided on the pulling shaft plate. The pulling shaft bolt is installed on the pulling shaft plate through the bolt positioning hole. The screw of the pulling shaft bolt passes through the pulling shaft plate and the coupling push plate and is arranged downward toward the stirring shaft. The pulling shaft bolt is threadedly matched with the screw hole at the upper end of the stirring shaft through the screw and is connected to the stirring shaft. A coupling push plate is provided at the front end of the piston rod of the hydraulic cylinder, and the coupling push plate is abutted against the upper end of the stirring shaft coupling.

[0015] Furthermore, a top groove is provided at the upper end of the stirring shaft coupling, and the coupling push plate matches the top groove.

[0016] Furthermore, a piston rod adjusting block is provided between the piston rod of the hydraulic cylinder and the coupling push plate.

[0017] The device for loading and unloading a stirring shaft coupling in a limited space of the present invention can disassemble and install the stirring shaft coupling in a limited space, and is particularly suitable for loading and unloading the stirring shaft coupling of a large stirring device. The coupling fixing mechanism of the device fixes the stirring shaft coupling on the fixing seat through the cooperation of an adjustable pressure block and a pressure sleeve, and then pushes the stirring shaft through the hydraulic cylinder of the driving mechanism, so that the stirring shaft coupling is separated from the stirring shaft, and the disassembly of the stirring shaft coupling is completed. When assembling the stirring shaft coupling, the stirring shaft of the device is installed with a locking mechanism, and the hydraulic cylinder body is fixed by a shaft pulling plate. And fix the pull shaft bolt, which is then connected to the stirring shaft to fix the connection between the hydraulic cylinder and the stirring shaft; the pull shaft plate cooperates with the pull shaft bolt to fix the relative position of the cylinder body of the hydraulic cylinder and the stirring shaft. Under the thrust of the piston rod of the hydraulic cylinder, the stirring shaft coupling and the stirring shaft produce relative movement and are sleeved on the stirring shaft. The device provided by the present invention is assembled and disassembled through the hydraulic cylinder, which is labor-saving and convenient to operate. The stirring coupling can be efficiently and easily loaded and unloaded in a limited space. At the same time, the assembly accuracy is high, which extends the service life of the reducer, mechanical seal and agitator parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a device for loading and unloading a stirring shaft coupling in a limited space in an embodiment;

[0019] Figure 2 is a schematic diagram of a lifting ring fixing plate in an embodiment;

[0020] Figure 3is a schematic diagram of a fixing base in an embodiment;

[0021] Figure 4 is a partial cross-sectional schematic diagram of a slide groove on a fixing seat in an embodiment;

[0022] Figure 5 is a schematic diagram of a device for loading and unloading a stirring shaft coupling in a limited space in an embodiment when the coupling is not disassembled;

[0023] Figure 6 is a schematic diagram of a device for loading and unloading a stirring shaft coupling in a limited space in an embodiment when the coupling is disassembled;

[0024] Figure 7 It is a schematic diagram of the device for loading and unloading the agitator shaft coupling in a limited space in the embodiment after the agitator shaft installation locking mechanism is added;

[0025] Figure 8 is a schematic diagram of a device for loading and unloading a stirring shaft coupling in a limited space in an embodiment when the coupling is not assembled;

[0026] Fig. 9 It is a schematic diagram of the device for loading and unloading the stirring shaft coupling in a limited space in the embodiment in the coupling assembly state. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention are further described in detail below. In the description of this specification, the description of the reference term "embodiment" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0028] The equipment parts of large-scale agitators are large and heavy, and they cannot be disassembled and installed without lifting equipment, especially the disassembly and assembly of the agitator shaft coupling. The assembly and disassembly operation space is limited by the reducer coupling. It is not only inconvenient to use lifting equipment, but also very laborious to use the usual coupling disassembly and assembly tools. For the agitator shaft coupling, the matching accuracy with the agitator shaft must be high and the clearance must be moderate. It is necessary to be convenient for assembly and disassembly and must be able to withstand large axial forces and bending torques. In view of the above-mentioned problems existing in the prior art, the present invention provides a device for loading and unloading the agitator shaft coupling in a limited space. It does not require manual operation and is easy to use. It uses a hydraulic cylinder for assembly and disassembly, which can improve the loading and unloading efficiency of the coupling, make the coupling unloading and assembly process more labor-saving and safe, and facilitate the maintenance and replacement of the agitator mechanical seal. This device can ensure that the maintenance and replacement of the mechanical seal of the agitator wearing parts is both light and fast, and greatly improves work efficiency and reliability.

[0029] See Figure 1 , Figure 2 Specifically, in one embodiment of the present invention, a device for loading and unloading a stirring shaft coupling in a limited space is provided, comprising:

[0030] The driving mechanism includes a hydraulic cylinder 102 disposed at the lower end of a fixed seat 101, a piston rod 103 of the hydraulic cylinder 102 is disposed toward the stirring shaft 1, the hydraulic cylinder serves as a thrust device, and the piston rod serves as a thrust output point, and has an oil filling joint, which can be supplied with oil by an electric or manual device;

[0031] The coupling fixing mechanism includes a fixing bolt 104 arranged at the lower end of the fixing seat 101, and an adjustable pressure block 105 is provided on the fixing bolt 104 and is threadedly matched with the fixing bolt 104. The adjustable pressure block 105 can cooperate with the stirring shaft coupling 2 to lock the stirring shaft coupling 2 and the fixing seat 101 together. The adjustable pressure block 105 has an internal thread and can adjust the landing point on the fixing bolt according to the size of the pressed coupling to ensure that the stirring shaft coupling is pressed.

[0032] Specifically in the embodiment of the present invention, the fixing seat 101 is provided with a slide groove 106 radiating outward from the center of the fixing seat, and the slide groove 106 is T-shaped. The fixing bolt 104 is clamped in the slide groove 106 through the nut 104A and the slide groove 106. The screw rod 104B of the fixing bolt 104 is arranged downward and extends out of the slide groove 106. The fixing bolt 104 can be moved and adjusted in the slide groove 106 according to the diameter of the coupling.

[0033] Specifically in this embodiment, the nut 104B of the fixing bolt is configured as a rectangular nut that matches the slide groove 106. Such a design can prevent the fixing bolt itself from rotating when the adjustable pressure block 105 is adjusted. In this embodiment, the fixing seat 101 is a disk with multiple slide grooves radiating from the center to the outer circle. The fixing bolt can move in the T-slot to adapt to stirring shaft couplings of different diameters.

[0034] In this embodiment, a pressing sleeve 107 is mounted on the fixing bolt 104, and the adjustable pressure block 105 can cooperate with the pressing sleeve 107 to lock the stirring shaft coupling 2 between the pressing sleeve 107 and the adjustable pressure block 105. The pressing sleeve 107 is located between the fixed seat and the pressed stirring shaft coupling, connecting the fixed seat and the coupling as a whole and supporting the fixed seat, thereby preventing the fixed seat from being deformed by force.

[0035] In this embodiment, two fixed bosses 108 are provided on the outer side of the hydraulic cylinder 102, and a lifting ring fixing plate 109 is provided on the slide 106 corresponding to the fixed boss 108. The upper end of the lifting ring fixing plate 109 is provided with a lifting ring fixing portion 109A that cooperates with the slide 106, and the lower end of the lifting ring fixing plate 109 extends out of the slide 106 and is provided with a mounting connection portion 109B. The mounting connection portion 109B is provided with a mounting hole 109C corresponding to the fixed boss 108. The hydraulic cylinder 102 is mounted on the lifting ring fixing plate 109 through the fixed boss 108 and the mounting hole 109C. In this embodiment, a lifting ring fixing plate 109 is provided for installing the hydraulic cylinder. The lifting ring fixing portion 109A of the lifting ring fixing plate 109 is also arranged in a rectangular shape so as to cooperate with the slide groove. In addition, in order to ensure the reliability of the installation of the hydraulic cylinder, in one embodiment of the present invention, a locking threaded hole 109D connected with the mounting hole 109C is further provided on the mounting connection portion 109B. The locking bolt 110 passes through the locking threaded hole 109D to fix the fixing boss 108 in the mounting hole 109C. The locking bolt can lock the position of the hydraulic cylinder and the lifting ring fixing plate.

[0036] In one embodiment of the present invention, a piston rod adjusting pad 111 is provided at the front end of the piston rod. The piston rod adjusting pad 111 is located between the piston rod and the pushed agitator shaft coupling to protect the pushed part and adjust the pushed distance. The diameter and thickness of the piston rod adjusting pad are determined according to the specific coupling size and the relative position of the piston rod. By replacing the height of the piston rod adjusting pad, the coupling with a long mating height can be disassembled with a small piston rod stroke.

[0037] The device in the above embodiment can be used for disassembling the stirring shaft 1 and the stirring shaft coupling 2. When in use, adjust the adjustable pressure block 105 to clamp the stirring shaft coupling 2 between the adjustable pressure block 105 and the pressing sleeve 107, continue to adjust the adjustable pressure block 105, lock the stirring shaft coupling 2 and the fixed seat 101 together, and then push the stirring shaft 1 through the piston rod 103 of the hydraulic cylinder 102 of the driving mechanism, so that relative movement is generated between the stirring shaft 1 and the stirring shaft coupling 2, so that the stirring shaft coupling 2 is separated from the stirring shaft 1, and the disassembly of the stirring shaft 1 and the stirring shaft coupling 2 is completed.

[0038] In an embodiment of the present invention, a device for loading and unloading a stirring shaft coupling in a limited space is also provided, which can be used for assembling a stirring shaft 1 and a stirring shaft coupling 2. On the basis of the device in the above embodiment, it also has:

[0039] The agitator shaft installation locking mechanism includes a pull shaft plate 112, which cooperates with the adjustable pressure block 105 through a pressing sleeve 107 and is locked together with the fixed seat 101. A hydraulic cylinder limiting portion 112A is provided on the pull shaft plate 112, and the hydraulic cylinder limiting portion 112A is abutted against the cylinder body 102A of the hydraulic cylinder 102 to limit the cylinder body of the hydraulic cylinder 102. An avoidance hole 112B is provided on the pull shaft plate 112 corresponding to the piston rod 103 of the hydraulic cylinder, and a bolt positioning hole 112C is provided on the pull shaft plate 112. The pull shaft bolt 113 is installed on the pull shaft plate 112 through the bolt positioning hole 112C. The screw of the shaft bolt 113 passes through the pull shaft plate 112 and is arranged downward toward the stirring shaft 1. The pull shaft bolt 113 is threadedly matched with the screw hole 1A at the upper end of the stirring shaft 1 through the screw rod and is connected to the stirring shaft 1. A coupling push plate 114 is provided at the front end of the piston rod of the hydraulic cylinder. The coupling push plate 114 is provided with a hole through which the screw of the pull shaft bolt 113 passes. The coupling push plate 114 is abutted against the upper end of the stirring shaft coupling 2. The upper end of the stirring shaft coupling 2 is provided with a top groove. The coupling push plate 114 matches the top groove. The coupling push plate 114 is used to push the coupling, so that the output thrust of the hydraulic cylinder piston rod can be transmitted to the coupling.

[0040] In one embodiment, a piston rod adjustment block 115 is further provided between the piston rod 103 of the hydraulic cylinder and the coupling push plate 114. Considering the small assembly space, the selected hydraulic cylinder is shorter and the piston rod extension length is also shorter. In order to ensure that the short hydraulic cylinder can assemble the longer coupling in place, the piston rod adjustment block 115 is provided. By continuously changing the height of the piston rod adjustment block 115, a coupling with a long matching height can be installed with a small piston rod stroke.

[0041] By setting up the locking mechanism for installing the agitator shaft, the device can be used to assemble the agitator shaft and the agitator shaft coupling. When in use, the agitator shaft is first connected by the pull-shaft bolt, and then the pull-shaft plate is locked by adjusting the adjustable pressure block. The hydraulic cylinder body and the pull-shaft bolt are fixed by the pull-shaft plate. The pull-shaft bolt connects the agitator shaft to fix the connection between the hydraulic cylinder and the agitator shaft. The pull-shaft plate cooperates with the pull-shaft bolt to fix the relative position of the hydraulic cylinder body and the agitator shaft. Under the thrust of the piston rod of the hydraulic cylinder, the agitator shaft coupling and the agitator shaft produce relative movement and are sleeved on the agitator shaft.

[0042] The device for loading and unloading a stirring shaft coupling in a limited space of the present invention can disassemble and install the stirring shaft coupling in a limited space, and is particularly suitable for loading and unloading the stirring shaft coupling of a large stirring device. Assembly and disassembly are performed by a hydraulic cylinder, and the operation is labor-saving and convenient. The stirring coupling can be efficiently and lightly loaded and unloaded in a limited space, and maintenance time and labor intensity are reduced, and installation is convenient; work efficiency is improved; in addition, the device for loading and unloading a stirring shaft coupling in a limited space of the present invention is suitable for stirring shaft couplings of various specifications, and the cost of making tools of various specifications is reduced. At the same time, the use of the device of the present invention has high assembly accuracy and extends the service life of the reducer, mechanical seal and agitator parts.

[0043] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A device for loading and unloading a stirring shaft coupling in a limited space, characterized in that: include: A driving mechanism, the driving mechanism comprising a hydraulic cylinder arranged at the lower end of the fixing seat, wherein the piston rod of the hydraulic cylinder is arranged toward the stirring shaft; A coupling fixing mechanism, the coupling fixing mechanism comprising a fixing bolt arranged at the lower end of the fixing seat, the fixing bolt being provided with an adjustable pressure block which is threadably matched with the fixing bolt, the adjustable pressure block being able to cooperate with the stirring shaft coupling to lock the stirring shaft coupling and the fixing seat together; The fixing bolt is sleeved with a pressing sleeve, and the adjustable pressing block can cooperate with the pressing sleeve to lock the agitator shaft coupling between the pressing sleeve and the adjustable pressing block; The camming shaft is locked together with the fixing seat, and a hydraulic cylinder limiting portion is arranged on the camming shaft plate, and the hydraulic cylinder limiting portion abuts against the cylinder body of the hydraulic cylinder to limit the cylinder body of the hydraulic cylinder. An avoidance hole is arranged on the camming shaft plate corresponding to the piston rod of the hydraulic cylinder, and a bolt positioning hole is arranged on the camming shaft plate, and the camming shaft bolt is installed on the camming shaft plate through the bolt positioning hole. The screw of the camming shaft bolt passes through the camming shaft plate and the coupling push plate and is arranged downwardly toward the stirring shaft. The camming shaft bolt is threadedly matched with the screw hole at the upper end of the stirring shaft through the screw and is connected to the stirring shaft. A coupling push plate is arranged at the front end of the piston rod of the hydraulic cylinder, and the coupling push plate abuts against the upper end of the stirring shaft coupling.

2. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 1, characterized in that: The fixing seat is provided with a slide groove radiating outward from the center of the fixing seat, the slide groove is T-shaped, the fixing bolt is clamped in the slide groove through a nut that cooperates with the slide groove, and the screw rod of the fixing bolt is arranged downward to extend from the slide groove.

3. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 2, characterized in that: The nut of the fixing bolt is configured as a rectangular nut matching the sliding groove.

4. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 2, characterized in that: At least two fixed bosses are provided on the outer side of the hydraulic cylinder, a lifting ring fixing plate is provided on the slide corresponding to the fixed bosses, a lifting ring fixing portion cooperating with the slide is provided on the upper end of the lifting ring fixing plate, a mounting connection portion is provided on the lower end of the lifting ring fixing plate extending out of the slide, a mounting hole is provided on the mounting connection portion corresponding to the fixed bosses, and the hydraulic cylinder is mounted on the lifting ring fixing plate through the fixed bosses cooperating with the mounting holes.

5. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 4, characterized in that: The installation connection portion is also provided with a locking thread groove communicated with the installation hole, and a locking bolt passes through the locking thread groove to fix a fixing boss located in the installation hole.

6. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 1, characterized in that: The front end of the piston rod is provided with a piston rod adjusting pad.

7. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 1, characterized in that: A top groove is arranged at the upper end of the stirring shaft coupling, and the coupling push plate matches the top groove.

8. The device for loading and unloading a stirring shaft coupling in a limited space according to claim 1, characterized in that: A piston rod adjusting block is also arranged between the piston rod of the hydraulic cylinder and the coupling push plate.

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