CN115228733B - Pneumatic pressing mechanism of precise top grid for powder classifying equipment - Google Patents
Pneumatic pressing mechanism of precise top grid for powder classifying equipment Download PDFInfo
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- CN115228733B CN115228733B CN202210874311.5A CN202210874311A CN115228733B CN 115228733 B CN115228733 B CN 115228733B CN 202210874311 A CN202210874311 A CN 202210874311A CN 115228733 B CN115228733 B CN 115228733B
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- screen box
- seat
- shaft
- upper plate
- rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 21
- 238000003825 pressing Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 title claims abstract description 9
- 230000004323 axial length Effects 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The precise grid-pushing pneumatic pressing mechanism for the powder grading equipment comprises a screen box upper plate and an upper screen box arranged below the screen box upper plate, wherein clamping assemblies are symmetrically arranged on the left side and the right side of the screen box upper plate and are connected with the upper screen box, and each clamping assembly comprises a fixed seat, a swinging seat and a clamping cylinder; the fixed seat is arranged on the upper part of the upper plate of the screen box and is provided with a shaft hole; the swinging seat comprises an annular part and shaft parts symmetrically arranged at two sides of the annular part, and the shaft parts of the swinging seat are assembled in the shaft holes of the fixing seat; the clamping cylinder is arranged on the annular part of the swing seat and is provided with a cylinder rod which stretches downwards and is connected with the upper screen box; wherein, be equipped with radial clearance between the shaft portion of pendulum seat and the shaft hole of fixing base. The mechanism can realize automatic control by starting the system, not only reduces working light, but also can realize remote automatic control. The mechanism has the advantages of relatively small number of parts, low manufacturing requirement of the parts and assembly requirement among the parts, simple structure, convenient operation and stable and reliable compaction.
Description
Technical Field
The invention belongs to the technical field of grain machinery, and particularly relates to a precise grid-pushing pneumatic pressing mechanism for powder classifying equipment.
Background
The square plansifter (square sifter) is mainly used for sieving and classifying various powder materials after grinding in a milling (corn, wheat, etc.) processing plant.
The upper portion of high side sieve is equipped with screen box upper plate and sets up the last screen box of screen box upper plate below, goes up the screen box and needs to realize pressing down through hold-down mechanism. At present, the compressing mechanism of the square screen mainly has two modes, namely, the mode one is vertical compression, namely, a connecting combination mode of a screw rod and a nut is adopted, the nut is fixed on an upper screen box, the compressing mechanism belongs to a fixing piece, the screw rod is connected to an upper screen box and an upper screen box plate, lifting of the screw rod is completed through rotating the screw rod, and a driving end drives the upper screen box to compress and lift. The pressing structure belongs to the current simple and convenient pressing structure form, the working precision of the pressing structure is determined by the machining precision of the sizes of the screw thread pair and the fixed screw thread pair parts of the upper screen box, and the service life of the pressing structure is determined by the machining precision, the materials and the quenching conditions of the screw thread pair parts. Its advantages are simple operation and stable and reliable compression. The disadvantage is that operators are required to do relatively high-level work above the upper screening box, which brings relative inconvenience to actual work. The other mode of the compression structure is a horizontal compression mode, and the horizontal compression is an improved compression mode developed for the inconvenience in vertical compression operation. The horizontal compaction belongs to a lever driving structure, a main transmission rod is a main driving part and is vertically arranged on the upper part of an upper screen box, a rotating part is arranged outside the upper screen box, for operation, the inside of the main transmission rod is connected with a rocker arm of a terminal through a nut sleeve, and the main transmission rod is rotated to enable the nut sleeve to drive the rocker arm to form reciprocating motion, so that the lower driving end of the rocker arm drives the upper screen box to complete compaction and loosening. The vertical compression type screen box has the advantages that compression can be completed at the front end of the screen box, the purpose of convenient operation is achieved, and compared with vertical compression, horizontal compression has obvious defects. That is, from the viewpoint of motion analysis, the whole motion needs to be converted from vertical to horizontal, and the problem of low efficiency exists. Compared with the vertical movement, the device has the advantages of more parts, high assembly precision and high probability of damage to the mechanism. The motion precision and the service life of the device are determined by the machining precision of the integral parts of the mechanism, the material quality and standard operation of the parts and the like.
To sum up, above-mentioned two kinds of all structures that compress tightly all need artifical torsion to accomplish to compress tightly, compress tightly inefficiency, and the fluctuation of compressing force is great. Therefore, a novel precise grid-pushing pneumatic pressing mechanism for powder grading equipment needs to be designed.
Disclosure of Invention
To solve the problems set forth in the background art. The invention provides a precise grid-pushing pneumatic pressing mechanism for powder grading equipment, which has the advantages of high automation degree, high working precision, high working efficiency, low failure rate and the like.
In order to achieve the above purpose, the present invention provides the following technical solutions: the top grid pneumatic clamping mechanism for the square screen comprises a screen box upper plate and an upper screen grid box arranged below the screen box upper plate, and is characterized in that clamping assemblies are symmetrically arranged on the left side and the right side of the screen box upper plate and are connected with the upper screen grid box, and each clamping assembly comprises a fixed seat, a swinging seat and a clamping cylinder; the fixed seat is arranged on the upper part of the upper plate of the screen box and is provided with a shaft hole; the swinging seat comprises an annular part and shaft parts symmetrically arranged at two sides of the annular part, and the shaft parts of the swinging seat are assembled in the shaft holes of the fixing seat; the clamping cylinder is arranged on the annular part of the swing seat and is provided with a cylinder rod which stretches downwards and is connected with the upper screen box; and a radial gap is arranged between the shaft part of the swing seat and the shaft hole of the fixed seat.
Preferably, the fixing seat comprises a fixing plate and two corner seats, the fixing plate is fixed on the upper plate of the screen box, the corner seats are fixed on the fixing plate, and the shaft holes are formed in the corner seats.
Preferably, a radial clearance between the shaft part of the swing seat and the shaft hole of the fixed seat is 0.5mm.
Preferably, through holes are formed in the left side and the right side of the upper plate of the screen box, a downward extending screw rod is mounted at the lower end of the clamping cylinder, and the downward extending screw rod penetrates through the through holes and is connected with the upper screen box.
Preferably, the downward extending screw rod comprises a threaded rod portion and a sleeve rod portion, the sleeve rod portion is of a cylindrical polish rod structure, a threaded hole connected with the clamping cylinder is formed in the upper end of the sleeve rod portion, and the threaded rod portion is a cylindrical rod with external threads and arranged below the sleeve rod portion.
Compared with the prior art, the invention has the beneficial effects that:
Compared with the traditional two pressing structures, the pneumatic pressing mechanism can realize automatic control through a starting system, so that the working difficulty is reduced, and remote automatic control can be realized. On the other hand, the mechanism has relatively less parts, low manufacturing requirements of the parts and assembly requirements among the parts, simple structure, convenient operation and stable and reliable compaction.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of a swing seat according to the present invention;
FIG. 4 is a schematic view of the working state structure of the present invention;
fig. 5 is a bottom view of the mounting structure of the elastic guide assembly of the present invention.
In the figure: 1. a screen box upper plate; 2. a screening box is arranged; 3. a swinging seat; 3-1, a ring portion; 3-2, a shaft portion; 4. a clamping cylinder; 5. a fixing plate; 6. a corner seat; 7. a downward extending screw rod; 8. a rectangular frame base; 9. a transverse ejector rod; 10. a roller; 11. and (3) a spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a pneumatic clamping mechanism of top check for square screen, includes screen box upper plate 1 and sets up in the last screen box 2 of screen box upper plate 1 below, and screen box upper plate 1 and last screen box 2 are the known part of square screen. Clamping assemblies are symmetrically arranged on the left side and the right side of the upper plate 1 of the screen box and are connected with the upper screen box 2. The clamping assembly is a driving assembly for driving the upper sieve box 2 to vertically compress.
In this embodiment, the clamping assembly comprises a fixed seat, a swinging seat 3 and a clamping cylinder 4.
The fixing base is used for installing and clamping the cylinder 4, and the fixing base is installed in the upper portion of the screen box upper plate 1, and the fixing base is equipped with the shaft hole. In this embodiment, specifically, the fixing base includes a fixing plate 5 and two corner bases 6. The fixing plate 5 is a rectangular plane plate and is fixed on the upper plate 1 of the screen box through a bolt assembly. The corner seat 6 is an L-shaped right angle plate body, the corner seat 6 is fixed on the fixed plate 5, and the shaft hole is arranged on the corner seat 6. The corner seat 6 ensures the proper height of the clamping cylinder in the device and ensures the accuracy of the stroke. The positioning height of the corner seat 6 in the device ensures that the maximum compression and extension of 50mm are met after the maximum lifting position of the upper screen box 2.
The pendulum base 3 is a member assembled to the fixing base for mounting a cylinder, and the pendulum base 3 includes a ring portion 3-1 and shaft portions 3-2 symmetrically provided on both sides of the ring portion 3-1, and the ring portion 3-1 and the shaft portions 3-2 are integrally formed. The shaft part 3-2 of the swinging seat 3 is assembled in the shaft hole of the fixed seat. A radial clearance is arranged between the shaft part 3-2 of the swinging seat 3 and the shaft hole of the fixed seat. The radial clearance between the shaft part 3-2 of the swinging seat 3 and the shaft hole of the fixed seat is 0.5mm. So as to meet the real-time variable-angle pressure following under the condition of small-angle inclination of the left and right sides of the upper screen box 2. After the pendulum seat 3 is installed, the radial clearance moves about 0.5mm and swings around the axial direction by plus or minus 3 degrees.
The clamping cylinder 4 is mounted on the annular part 3-1 of the swing seat 3, and the clamping cylinder 4 is provided with a cylinder rod which stretches downwards and is connected with the upper screen box 2. Specifically, the lower end of the cylinder body of the clamping cylinder 4 is connected to the annular portion 3-1 of the pendulum base 3 by a screw. The left and right sides portion of screen box upper plate 1 is equipped with the through-hole, and the lower extreme installation of clamping cylinder 4 stretches screw rod 7 down, stretches screw rod 7 and runs through the through-hole and be connected with last screen box 2 down. The downward extending screw rod 7 comprises a threaded rod part and a sleeve rod part, the sleeve rod part is of a cylindrical polish rod structure, the upper end of the sleeve rod part is provided with a threaded hole connected with the clamping cylinder, and the threaded rod part is a cylindrical rod with external threads, which is arranged below the sleeve rod part. The length of the rod of the clamping cylinder 4 is rotatably assembled by adjusting the sleeve rod part of the downward-extending screw rod 7, so that the assembling height of the side part of the upper screen box 2 can be adjusted.
In the embodiment, the working air pressure of the clamping cylinder 4 is 0.5-0.9Mpa, the maximum compression is 50mm, and the maximum pressure maintaining time is 8h. The device is provided with pressure supply by a stable air source, so that the air in the cylinder cannot be removed in consideration of the condition that the air source is disconnected once power is cut off and other factors, a check valve (an external air supply element) can be connected in series in the air path, and the device ensures that the pressure maintaining time of the air in the cylinder is not less than 8 hours once the air source cannot provide the pressure air.
The diameter of the through holes on the left and right sides of the upper plate 1 of the screen box is larger than the outer diameter of the downward extending screw. In this embodiment, in order to ensure that the structure operation is more stable, the mechanism noise of operation is reduced. Referring to fig. 5, the elastic guide assembly is installed at the lower part of the upper plate of the screen box and corresponding to the position of the through hole, the elastic guide assembly comprises a rectangular frame seat 8, the side wall of the rectangular frame seat 8 has a certain thickness, transverse ejector rods 9 are installed at the left side and the right side of the rectangular frame seat 8, and idler wheels 10 are installed at the inner ends of the transverse ejector rods 9.
Specifically, the both sides of rectangle frame seat 8 are equipped with the jack that the cross section is the rectangle, and the jack has certain axial length, and horizontal ejector pin 9 is the rectangular rod of joining in marriage and installing in this jack, and the both ends of horizontal ejector pin 9 are the end portion, are equipped with spring 11 between the inner end portion of horizontal ejector pin and the inner wall of rectangle frame seat, and spring 11 suit is in horizontal ejector pin 9, and spring 11 applys the elasticity to the rectangle frame seat in to horizontal ejector pin 9, and the axis of gyro wheel 10 is parallel with the axial line of pendulum seat 3, and the round surface contact of gyro wheel 10 stretches down the loop pole portion outer wall of screw rod.
Further, the outer end of the transverse roof is a threaded round rod part, and an adjusting nut is assembled on the threaded round rod part to adjust the inward extending length of the adjusting nut. The elastic guide assembly forms elastic guide slits on two sides of the transverse ejector rod, so that the swing seat can be maintained to move actively, and the micro swing of parts of the mechanism due to the slits in the working process can be effectively prevented, so that the whole structure works more stably and the working noise is eliminated.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides a pneumatic hold-down mechanism of accurate top check for powder classification equipment, includes screen box upper plate (1) and sets up in last screen box (2) of screen box upper plate (1) below, its characterized in that, the left and right sides symmetry of screen box upper plate (1) sets up clamping assembly, clamping assembly with go up screen box (2) are connected, clamping assembly includes:
The fixing seat is arranged on the upper portion of the upper plate (1) of the screen box and is provided with a shaft hole, the fixing seat comprises a fixing plate (5) and two corner seats (6), the fixing plate (5) is fixed on the upper plate (1) of the screen box, the corner seats (6) are fixed on the fixing plate (5), and the shaft hole is formed in the corner seats (6);
The swinging seat (3) comprises an annular part (3-1) and shaft parts (3-2) symmetrically arranged at two sides of the annular part, and the shaft parts (3-2) of the swinging seat (3) are assembled in the shaft holes of the fixing seat;
The clamping cylinder (4), the clamping cylinder (4) is installed in the annular part (3-1) of the swing seat (3), the clamping cylinder (4) is provided with a cylinder rod which stretches downwards, the cylinder rod is connected with the upper screen box (2), through holes are formed in the left side part and the right side part of the upper screen box plate (1), a downward extending screw rod (7) is installed at the lower end of the clamping cylinder (4), the downward extending screw rod (7) penetrates through the through holes and is connected with the upper screen box (2), the downward extending screw rod (7) comprises a threaded rod part and a sleeve rod part, the sleeve rod part is of a cylindrical polish rod structure, the upper end of the sleeve rod part is provided with a threaded hole connected with the clamping cylinder, and the threaded rod part is a cylindrical rod with external threads and arranged below the sleeve rod part;
Wherein, a radial clearance is arranged between the shaft part (3-2) of the swing seat (3) and the shaft hole of the fixed seat;
an elastic guide component is arranged at the lower part of the upper plate of the screen box and corresponds to the position of the through hole, the elastic guide component comprises a rectangular frame seat (8), the side wall of the rectangular frame seat (8) has a certain thickness, transverse ejector rods (9) are arranged at the left side part and the right side part of the rectangular frame seat (8), and idler wheels (10) are arranged at the inner ends of the transverse ejector rods (9);
The both sides of rectangle frame seat (8) are equipped with the jack that the cross section is the rectangle, the jack has certain axial length, horizontal ejector pin (9) are the rectangular bar of joining in marriage in this jack, the both ends of horizontal ejector pin (9) are the end portion, be equipped with spring (11) between the inner end portion of horizontal ejector pin and the inner wall of rectangle frame seat, spring (11) suit is in horizontal ejector pin (9), spring (11) apply to horizontal ejector pin (9) to the elasticity in the rectangle frame seat, the axis of gyro wheel (10) is parallel with the axial line of pendulum seat (3), the round face contact of gyro wheel (10) stretches down the cover pole portion outer wall of screw rod.
2. The precise grid-pushing pneumatic pressing mechanism for powder classifying equipment according to claim 1, wherein the radial clearance between the shaft part (3-2) of the swinging seat (3) and the shaft hole of the fixed seat is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210874311.5A CN115228733B (en) | 2022-07-24 | 2022-07-24 | Pneumatic pressing mechanism of precise top grid for powder classifying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210874311.5A CN115228733B (en) | 2022-07-24 | 2022-07-24 | Pneumatic pressing mechanism of precise top grid for powder classifying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115228733A CN115228733A (en) | 2022-10-25 |
| CN115228733B true CN115228733B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210874311.5A Active CN115228733B (en) | 2022-07-24 | 2022-07-24 | Pneumatic pressing mechanism of precise top grid for powder classifying equipment |
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| CN (1) | CN115228733B (en) |
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|---|---|---|---|---|
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| US3968033A (en) * | 1974-02-25 | 1976-07-06 | Osterreichisch-Amerikanische Magnesit Aktiengesellschaft | Clamping device for screen bottoms |
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