An internal screw disassembly device

Abstract

The present application relates to a kind of inner screw rod pulling device, it is mutually matched with screw rod and barrel when working, specifically, the device cooperates with the end of barrel to form sealed pressurized cavity, the punch cavity is configured to be inflatable;The device further includes pulling part, which is connected to the screw rod, and is configured to be movable along the axial direction of the screw rod, and the punch cavity pressure is applied to the pulling part.The present application is mutually matched with barrel, so that a sealed space can be formed in communication with the inside of the barrel, and by the cooperation of the pulling part, the sealed space is pressurized to make the pulling part movable, to realize the pulling of screw rod, the whole process uses the effect of air pressure force, without human cooperation, so as to replace manual operation for disassembly.

Description

TECHNICAL FIELD

[0001] The present application relates to screw extruder maintenance equipment, in particular to an inner screw dismounting device. BACKGROUND

[0002] During the regular maintenance of a twin-screw extruder, the inner screw needs to be taken out for cleaning. At present, the dismounting of the inner screw is a particularly laborious task. Generally, the screw is knocked at one end of the barrel of the extruder and then pulled out from the other end of the barrel, so that the screw is taken out. Alternatively, a threaded pull rod is used to forcibly pull out the extruder screw by connecting the threaded pull rod to one end of the base screw.

[0003] The above methods generally have the disadvantage of consuming manpower. Whether knocking or forcibly pulling, a lot of force is required, which brings certain difficulties to the whole process. SUMMARY

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

[0005] To solve the technical problems reflected in the background art, the present application provides the following technical solutions:

[0006] An inner screw dismounting device acts on the screw and the barrel, and:

[0007] The device forms a sealed pressurized cavity at one end of the barrel, and the pressurized cavity is configured to be inflatable.

[0008] The device further comprises a pulling part connected to the screw and configured to be movable along the axial direction of the screw, and the pressurized cavity exerts pressure on the pulling part.

[0009] As a preferred technical solution of the inner screw dismounting device, the pressurized cavity comprises intercommunicating:

[0010] A first gas cavity is formed by cooperation of the first end of the barrel.

[0011] A second gas cavity is formed by cooperation of the second end of the barrel, and the pulling part constitutes a side cavity wall of the second gas cavity and is configured to slide relative to the barrel.

[0012] As a preferred technical scheme of the inner screw rod pulling device, the guiding channel is linear, is fixed relative to the cylinder, and forms the second air cavity together with the cylinder. The pulling part slides along the guiding channel.

[0013] As a preferred technical scheme of the inner screw rod pulling device, the abutting part is arranged at the first end of the cylinder, and forms the first air cavity together with the first end of the cylinder. One end of the guiding channel abuts against the second end of the cylinder.

[0014] As a preferred technical scheme of the inner screw rod pulling device, the bearing part is fixed relative to the guiding channel, and the cylinder is arranged on the bearing part.

[0015] As a preferred technical scheme of the inner screw rod pulling device, the support end of the cylinder is arranged on the bearing part, and the cylinder is movable along the guiding channel on the support end.

[0016] As a preferred technical scheme of the inner screw rod pulling device, the abutting part is movably arranged on the bearing part, and is limited on the bearing part.

[0017] As a preferred technical scheme of the inner screw rod pulling device, the pulling part comprises a guide part and a rotating part rotatably arranged on the guide part. The guide part is in sliding connection with the guiding channel, and the rotating part is connected to the screw rod and rotates during the pressing process.

[0018] As a preferred technical scheme of the inner screw rod pulling device, the rotating part is provided with a jet end in communication with the second air cavity.

[0019] As a preferred technical scheme of the inner screw rod pulling device, the first air cavity is provided with an oil supply end, and the screw rod axially guides the lubricant during the rotation process.

[0020] The inner screw rod pulling device has the following advantages:

[0021] 1. The cylinder and the inner screw rod pulling device cooperate to form a sealed space in communication with the cylinder, and the pulling part is movable by pressurizing the sealed space, so that the screw rod is pulled. The whole process uses the effect of air pressure, and does not need human power, so that the disassembly work can be replaced by human power.

[0022] 2. The special structure of the pulling part can drive the screw rod to rotate when the pulling part is movable by air pressure, so as to cooperate with the lubricating oil supply, so that the screw rod can lubricate the inner wall of the cylinder, and the screw rod can be easily pulled out. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the rear shield in the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the piston and the rotating block in the embodiment of the present application.

[0027] Figure 4 It is another perspective view of Figure 3 .

[0028] Figure 5 It is a split schematic diagram of Figure 3 .

[0029] Figure 6 It is an application schematic diagram of the embodiment. Figure 1

[0030] It is a cutaway display diagram of the structure shown in Figure 7 . Figure 6

[0031] Figure 8 It is another perspective view of Figure 7 .

[0032] Reference signs:

[0033] 1, barrel; 2, screw rod; 3, base; 4, roller; 5, front shield; 6, guide channel; 7, rear shield; 8, threaded rod; 9, high-pressure nozzle; 10, air inlet nozzle; 11, piston; 12, rotating block; 13, clamp tile; 14, air jet nozzle; 15, pipeline. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.​

[0036] Second, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, characteristic, or combination of features and / or characteristics described herein that can be included in at least one implementation of the present application. The various appearances of "in one embodiment" or "an embodiment" in the specification do not all refer to the same embodiment, although they can.

[0037] Third, the present application is described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of explanation, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0038] Referring to Figures 1-5 , the embodiment of the present application provides an inner screw dismounting device. Specifically, the device comprises a base 3, a front guard cover 5 is fixedly arranged on the base 3, and a rear guard cover 7 is movably connected to the base 3 through a threaded rod 8. The threaded rod 8 is threadedly connected with the base 3 and movably connected with the rear guard cover 7. When the threaded rod 8 is rotated, the position of the rear guard cover 7 on the base 3 can be adjusted.

[0039] Regarding the front guard cover 5, a straight-through guide channel 6 is formed in the inside of the front guard cover 5. A slidable piston 11 is arranged in the guide channel 6. Two pairs of clamping shoes 13 are arranged on the piston 11 and can be locked by bolts.

[0040] As shown in the figure, Figures 6-8 When the inner screw 2 is dismounted, the cylinder 1 is placed on the base 3, the piston 11 is pulled out of the guide channel 6 to expose the clamping shoes 13, and then the clamping shoes 13 are locked by hand operation to lock the end of the screw 2. Then, the rear guard cover 7 is adjusted to abut against the other end of the cylinder 1, the threaded rod 8 is rotated to make the rear guard cover 7 abut against the cylinder 1, so that the cylinder 1 is kept abutting between the front guard cover 5 and the rear guard cover 7. At this time, the state is as shown in the figure, Figure 6 The rear guard cover 7 cooperates with one end of the cylinder 1 to form a first air chamber, and the front guard cover 5 cooperates with the other end of the cylinder 1 together with the piston 11 to form a second air chamber. Here, a pipeline 15 is connected between the guide channel 6 and the rear guard cover 7, so that the first air chamber and the second air chamber are in sufficient communication.

[0041] The application also comprises an inflation device, which inflates the first air cavity and the second air cavity which are kept in communication, in particular, the front cover 5 (or the rear cover 7) is provided with an air inlet 10, the inflation device can adopt elements such as air pump (not shown in the figure), the inflation device is connected with the air inlet 10, so that the first air cavity and the second air cavity can be inflated, so that the inside of the two forms a high pressure state, so as to push the piston 11 to move in the guide channel 6, the moving direction of the piston 11 is Figure 7 The arrow direction shown in the figure, by moving the piston 11, the screw rod 2 can be pulled to complete the removal of the screw rod 2 in the cylinder 1, so as to replace the manual disassembly work of the screw rod 2.

[0042] Further, referring to Figure 1 In the above process, in the process of abutting the end of the cylinder 1 to the front cover 5, the cylinder 1 is slightly moved on the base 3, therefore, the support end (roller 4) can also be provided on the base 3 to facilitate the movement of the cylinder 1, thereby facilitating the preparation before the disassembly work.

[0043] Further, referring to Figures 3-5 Regarding the structure of the piston 11, two rotating blocks 12 are rotatably arranged thereon, which correspond to two inner screw rods 2 respectively, two pairs of clamping shoes 13 are connected to the two rotating blocks 12 respectively, the rotating blocks 12 penetrate through the two sides of the piston 11, so as to participate in the sealing process of the second air cavity together, which is equivalent to the inner wall of the second air cavity, one end of the rotating block 12 away from the second air cavity is provided with a jet nozzle 14 with a small hole diameter, the direction of the jet nozzle 14 is consistent with the tangential direction of the rotation of the rotating block 12, when the second air cavity reaches a certain high pressure, the excess pressure will be discharged through the jet nozzle 14, so that high-speed airflow is sprayed at the jet nozzle 14, so that the rotating block 12 can be rotated on the piston 11 through the counter thrust of the airflow, thereby driving the screw rod 2 to rotate synchronously, so that the two screw rods 2 move symmetrically, at the same time, the rear cover 7 is also provided with a high-pressure nozzle 9, which is used for spraying lubricating oil into the first air cavity, so that the lubricating oil is concentrated at one end of the screw rod 2, through the operation of the two screw rods 2, the lubricating oil can be driven to the other end of the screw rod 2, that is, the lubricating oil is driven from the first air cavity to the side of the second air cavity, in this process, the lubricating oil is fully lubricated to the inner wall of the cylinder 1 under the action of the screw rod 2, so as to reduce the friction between the screw rod 2 and the inner wall of the cylinder 1, thereby further facilitating the pulling process of the screw rod 2.

[0044] It should be understood that, in the development of any actual implementation, as in any engineering or design project, a large number of implementation decisions can be made. Such development efforts can be complex and time-consuming, but without undue experimentation, the development efforts will be a routine work of design, manufacture and production for those skilled in the art who benefit from this disclosure.

[0045] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An internal screw disassembly device, acting on the screw and barrel, characterized in that: The device forms a sealed pressurization chamber with one end of the barrel, and the pressurization chamber is configured to be inflatable. The device further includes a pulling part connected to the screw and configured to remain movable along the screw axis, wherein the pressure of the pressurizing chamber is applied to the pulling part; The pressurization chamber includes a first air chamber and a second air chamber that are interconnected. The first air chamber is formed by fitting a first end of the barrel, and the second air chamber is formed by fitting a second end of the barrel. The pulling part constitutes one side wall of the second air chamber and is configured to slide relative to the barrel. The device also includes a linearly oriented guide channel, which is relatively fixed to the barrel and forms the second air chamber with the barrel. The pulling part slides in a sealed manner along the guide channel. The pulling part includes a guide and a rotating part rotatably disposed on the guide. The guide is slidably engaged with the guide channel, and the rotating part is connected to the screw and maintains rotational motion during the pressure process.

2. The internal screw removal device according to claim 1, characterized in that: It also includes a clamping part acting on the first end of the barrel, the clamping part cooperating with the first end of the barrel to form the first air cavity, and one end of the guide channel abutting against the second end of the barrel.

3. The internal screw removal device according to claim 2, characterized in that: It also includes a support unit, which is fixedly positioned relative to the guide channel, and the barrel is placed on the support unit.

4. The internal screw removal device according to claim 3, characterized in that: The bearing portion is provided with a support end that supports the barrel, and the barrel remains movable along the guide channel on the support end.

5. The internal screw removal device according to claim 3, characterized in that: The clamping part is movably disposed on the bearing part and maintains a limiting fit on the bearing part.

6. The internal screw removal device according to claim 1, characterized in that: The rotating component is provided with a jet end, which is in communication with the second air chamber.

7. The internal screw removal device according to claim 1, characterized in that: The first air chamber is equipped with an oil supply end, and the screw guides the lubricant axially during rotation.

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