Screen mesh tensioning device of roller round screen

Abstract

A rotating frame opening extending in the full length direction is formed in the circumference of a rotating frame, the head end of a screen is fixed to a head end fixing rod, the head end fixing rod is embedded in a groove of a tensioning shaft, and the tensioning shaft is located in an inner cavity of the rotating frame and close to the rotating frame opening. The screen is led out of the head end fixing rod and then penetrates through the opening of the rotating frame to be wrapped on the periphery of the rotating frame, the tail of the screen enters an inner cavity of the rotating frame from the opening of the rotating frame, bypasses the tensioning shaft and is wound on the tail end fastening rod, and the tail end fastening rod is located between the tensioning shaft and the opening of the rotating frame. A ratchet wheel is fixed to the outer end of the tensioning shaft, a pawl enabling the ratchet wheel to rotate in one direction is embedded in ratchets of the ratchet wheel, and a tensioning hand wheel is fixed to the outer side of the ratchet wheel. The screen is wrapped in the anticlockwise direction, and the ratchet wheel and the tensioning hand wheel rotate in the clockwise direction. According to the tensioning device for the screen mesh of the roller round sieve, the screen mesh can be rapidly replaced, the screen mesh can be effectively tensioned, and the screen mesh can be continuously tensioned in the follow-up process.

Description

Technical Field

[0001] The utility model relates to a drum round screen, in particular to a drum round screen screen tensioning device, belonging to the technical field of screening equipment. Background Art

[0002] Screening equipment is often used for sorting or removing impurities from granular materials. The drum screen is a sorting machine favored by many grain processing companies. It screens by wrapping the screen around the outer circumference of the rotating frame. At present, there are mainly the following ways to tension the screen of the drum screen:

[0003] 1. The tensioning device with a wooden strip as the pressing strip: The pressing strip of this tensioning device is a wooden structure. The long strip of screen is first fixed on the axially long bottom wooden strip on the rotating frame of the drum round screen manually, and then it goes around the circumference, and the long wooden strip is pressed on the overlap of the screen, and then nailed with iron nails. The existing problems are: the iron nails need to be taken out and nailed during the replacement of the screen, and the speed is slow. After the screen is tensioned, it cannot be tightened again. At the same time, the wooden strip will become moldy and black when working in a humid environment for a long time, affecting the product quality.

[0004] 2. Tensioning device for fixed cylindrical screen with slightly smaller diameter: The rotating frame of this tensioning device is made of stainless steel. First, make a cylindrical screen with a diameter slightly smaller than the rotating frame, then put the cylindrical screen on one end of the rotating frame, and then tie the two ends of the screen tightly. The existing problem is that the cylindrical screen with a slightly smaller diameter made in advance is difficult to put on the rotating frame with a slightly larger diameter, and the tension of the screen is poor after putting it on, and it cannot be tightened again after putting it on. During use, the screen is not tightened, which shortens the service life of the screen.

[0005] The Chinese invention patent application with publication number CN116273820A discloses a self-tensioning drum screening machine, whose self-tensioning structure can only tension the transmission belt but cannot tension the screen. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0008] The purpose of the utility model is to overcome the problems existing in the prior art and provide a drum round screen tensioning device that can be quickly replaced and can not only effectively tension the screen but also continuously tension the screen subsequently.

[0009] In order to solve the above technical problems, the utility model provides a drum round screen tensioning device, comprising a screen, a rotating frame opening extending along the full length direction is provided on the circumference of the rotating frame, the head end of the screen is fixed on the head end fixing rod, the head end fixing rod is embedded in the groove of the tensioning shaft, the tensioning shaft is located in the inner cavity of the rotating frame and close to the rotating frame opening, the screen is led out from the head end fixing rod and then passes through the rotating frame opening and is wrapped around the outer circumference of the rotating frame, the tail end of the screen enters the inner cavity of the rotating frame from the rotating frame opening, bypasses the tensioning shaft and is wound around the tail end tightening rod, the tail end tightening rod is located between the tensioning shaft and the rotating frame opening; a ratchet is fixed to the outer end of the tensioning shaft, a pawl that enables the ratchet to rotate unidirectionally is embedded on the ratchet teeth of the ratchet, and a tensioning handwheel is fixed to the outer side of the ratchet.

[0010] As an improvement of the utility model, two rotating frame round rods parallel to each other are provided at the opening of the rotating frame.

[0011] As a further improvement of the present invention, the screen is wrapped around the outer periphery of the rotating frame in a counterclockwise direction, and the ratchet and the tensioning handwheel rotate in a clockwise direction.

[0012] Compared with the prior art, the utility model has achieved the following beneficial effects: 1. It is convenient to quickly replace the screen, which significantly improves the efficiency of replacing the screen;

[0013] 2. The ratchet structure and double-axis twisting tension the screen, and the screen can be reliably kept in tension for a long time, which not only effectively improves the tensioning efficiency of the screen, but also significantly extends the service life of the screen;

[0014] 3. Under the premise of keeping the screen taut, the problem of the wooden structure becoming moldy and causing unqualified product quality due to long-term use in a humid environment is avoided, the quality of the screened products is improved, and the economic benefits of the drum round screen are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. The drawings are only provided for reference and explanation, not for limiting the present utility model. Among them:

[0016] Figure 1 It is a three-dimensional diagram of the screen tensioning device of the drum round screen of the utility model;

[0017] Figure 2 for Figure 1A partial enlarged view of the

[0018] Figure 3 for Figure 1 End view of

[0019] Figure 4 for Figure 3 A partial enlarged view of the

[0020] In the figure: 1. head end fixing rod; 2. screen; 3. rotating frame; 3a. rotating frame round rod; 4. tensioning shaft; 5. tail end tightening rod; 6. ratchet; 7. pawl fixing piece; 8. pawl; 9. tensioning handwheel; 10. shaft retaining ring. DETAILED DESCRIPTION

[0021] In the following description of the utility model, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not mean that the device must have a specific direction.

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] like Figures 1 to 4 As shown, the screen tensioning device of the drum round screen of the utility model comprises a head end fixing rod 1, a screen 2, a rotating frame 3, a tensioning shaft 4, a tail end fixing rod 5, a ratchet 6, a pawl 8 and a tensioning handwheel 9. A rotating frame opening extending along the full length direction is provided on the circumference of the rotating frame 3. Two rotating frame round rods 3a parallel to each other are provided at the rotating frame opening. The distance between the two rotating frame round rods 3a is the seam width of the rotating frame opening. The screen 2 makes an arc turn from the rotating frame round rod 3a.

[0025] The head end of the screen 2 is fixed on the head end fixing rod 1, and the head end fixing rod 1 is embedded in the groove of the tensioning shaft 4. The tensioning shaft 4 is located in the inner cavity of the rotating frame 3 and close to the rotating frame opening. The screen 2 is led out from the head end fixing rod 1 and passes through the rotating frame opening and is wrapped around the outer periphery of the rotating frame 3 in a counterclockwise direction. The tail of the screen 2 enters the inner cavity of the rotating frame from the rotating frame opening, bypasses the tensioning shaft 4 and is wound around the tail end tightening rod 5, and the tail end tightening rod 5 is located between the tensioning shaft 4 and the rotating frame opening; a ratchet 6 is fixed to the outer end of the tensioning shaft 4, and a pawl 8 is embedded on the ratchet teeth of the ratchet 6 to make the ratchet 6 rotate unidirectionally clockwise, the root of the pawl 8 is hinged on the pawl fixing piece 7, and a tensioning handwheel 9 is fixed to the outside of the ratchet 6.

[0026] The installation process of the screen tensioning device is as follows:

[0027] One end of the screen 2 is fixed to the tensioning shaft 4 through the head end fixing rod 1, and then passes through the rotating frame opening formed by the rotating frame 3 and the tail end fixing rod 5 and rotates counterclockwise along the outer circumference of the rotating frame 3 for one circle, then penetrates from the rotating frame opening formed by the rotating frame 3 and the tail end fixing rod 5 and rotates clockwise around the tensioning shaft 4, and is fixed to the rotating frame 3 through the tail end fixing rod 5, and then the ratchet 6 is fixed to the tensioning shaft 4, and the ratchet 8 is fixed to the end cover through the ratchet fixing piece 7, and the ratchet 8 is embedded in the ratchet 6 to limit the turning of the ratchet 6 so that the ratchet 6 can only rotate clockwise; then the tensioning handwheel 9 is installed on the tensioning shaft 4 through a key, and finally the ratchet 6 is axially limited by the shaft retaining ring 10 to form a screen tensioning device for the drum round screen.

[0028] The tensioning hand wheel 9 rotates clockwise, and the screen 2 is tensioned in the structure where the head end fixing rod 1 and the tensioning shaft 4 form a twisted shaft, and the pawl 8 limits the ratchet wheel 6 from rotating counterclockwise to keep the screen 2 tensioned. If necessary, the above tensioning process can be repeated later.

[0029] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation modes without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. A drum round screen tensioning device, comprising a screen, characterized in that: A rotating frame opening extending along the full length direction is provided on the circumference of the rotating frame, the head end of the screen is fixed on the head end fixing rod, the head end fixing rod is embedded in the groove of the tensioning shaft, the tensioning shaft is located in the inner cavity of the rotating frame and close to the rotating frame opening, the screen is led out from the head end fixing rod, passes through the rotating frame opening and is wrapped around the outer circumference of the rotating frame, the tail end of the screen enters the inner cavity of the rotating frame from the rotating frame opening, bypasses the tensioning shaft and is wound around the tail end tightening rod, the tail end tightening rod is located between the tensioning shaft and the rotating frame opening; a ratchet is fixed to the outer end of the tensioning shaft, a pawl that enables the ratchet to rotate unidirectionally is embedded on the ratchet teeth of the ratchet, and a tensioning handwheel is fixed to the outer side of the ratchet.

2. The drum screen tensioning device according to claim 1 is characterized in that: Two rotating frame round rods parallel to each other are arranged at the opening of the rotating frame.

3. The drum screen tensioning device according to claim 1 is characterized in that: The screen is wrapped around the outer circumference of the rotating frame in a counterclockwise direction, and the ratchet and the tensioning hand wheel rotate in a clockwise direction.

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