CN216914941U - Screw shaft structure and screw squeezing dehydrator for culture dehydration equipment - Google Patents

Abstract

The utility model discloses a screw shaft structure and a screw press dehydrator used in aquaculture dehydration equipment. The screw shaft adopts the structure of double screw propeller shaft and discontinuous shaft: the conveying section adopts a double-head continuous screw, and the screw blades of the double-head continuous screw are two whole continuous screw blades arranged mirror-symmetrically with the shaft as the center; the dehydration section Intermittent helix, namely broken tooth helix, is adopted. The helical blades of the discontinuous helix are arranged intermittently in two groups of one piece, and the two helical blades of each group are mirror-symmetrical with the axis as the center; the dewatering section of the helical axis It includes a helical section with a helical blade and a discontinuity without a helical blade; the front end of each helical blade of each group of the broken tooth helix is provided with a sharp blade, which can effectively cut off long fibers. The screw shaft has low processing cost and simple processing, and can be adjusted in time for the uneven concentration. The screw press dehydrator can improve the dehydration performance, effectively reduce the moisture content of the mud, and is not easy to block the shaft.

Description

Screw shaft structure and screw press dehydrator used in aquaculture dehydration equipment

technical field

The utility model belongs to the technical field of sewage treatment, and relates to a screw shaft structure and a screw press dehydrator used in aquaculture dehydration equipment.

Background technique

In recent years, with the rapid rise and rapid development of the intensive and large-scale livestock and poultry breeding industry, the scale of breeding has continued to expand, and the amount of livestock and poultry manure, sewage and other breeding wastes has also increased rapidly, resulting in an increase in environmental bearing pressure. The breeding pollution and environmental protection problems caused by poultry breeding sewage (wastewater) are becoming more and more serious. According to the determination, the daily BOD (biochemical oxygen demand) in adult pig feces is 13 times that of human feces. The breeding sewage (wastewater) produced by pig farms has become or is becoming a source of pollution equal to or even greater than industrial wastewater and domestic sewage. Improper treatment will bring a great threat to environmental protection.

Aquaculture sewage (sludge) has the characteristics of uneven concentration (sometimes thin, sometimes viscous). The sewage (sludge) in the breeding industry is accompanied by more long-fiber materials (feces), fine particles (such as manure, feed, etc.) and other sundries. At present, the screw shaft used in the pressing and dewatering equipment for the treatment of aquaculture sewage on the market is difficult to process, the water content of the mud is unstable, the shaft is easy to block, and it is impossible to adjust the uneven feed concentration in time. , Due to the uneven concentration of feces, the solid-liquid separation performance (dehydration performance) will decrease and other defects.

The screw shaft structure used in the existing aquaculture dehydration equipment mainly has the following problems to be solved:

(1) The traditional helical shaft blade is difficult to process, and the welding workload is large;

(2) Due to the uneven concentration of manure at the front end, the equipment cannot make adaptive adjustments in time, resulting in unstable mud moisture content;

(3) There are many long-fiber materials in the aquaculture sludge, which are easy to wrap around the spiral blades, causing blockage in the dehydration chamber.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and the screw shaft used in the existing aquaculture dehydration equipment is difficult to process, the water content of the mud is unstable, the shaft is easy to block, and the adjustment cannot be made in time for the phenomenon of uneven concentration. , Due to the defects such as the decrease of solid-liquid separation performance due to the uneven concentration of feces, it provides a screw shaft structure and a screw shaft for aquaculture dewatering equipment that is less difficult to process, not easy to block the shaft, and can be adjusted in time for materials with uneven concentrations. Press dehydrator.

The technical scheme of the present utility model is as follows:

The utility model is a structure of a screw shaft (also known as a screw press conveying shaft or a screw pressing screw shaft) used on aquaculture dehydration equipment, which adopts the structure of a double screw propeller shaft (conveying section) plus an interrupted shaft (extrusion section): The screw shaft includes shaft heads at both ends and a long shaft in the middle. The long shaft in the middle is divided into a conveying section and a dewatering section; the conveying section adopts a double-ended continuous screw, and the spiral blades of the double-ended continuous screw are mirror images centered on the shaft Symmetrically arranged two continuous spiral blades; the dehydration section adopts an intermittent spiral (also known as a broken tooth spiral). The two helical blades are arranged in mirror symmetry with the axis as the center; that is, the dewatering section of the helical shaft includes a helical section with a helical blade and a discontinuity without a helical blade (there is a discontinuity between two adjacent helical sections. There are two front and rear fractures (that is, the front and rear ends) of each helical blade of each group of the broken tooth helix; the front end (front feeding end) of each helical blade of each group of the broken tooth helical has two fractures. Features a sharp blade.

Further, the shaft of the screw shaft and the double-ended continuous helix and the broken-tooth helix on the shaft are made of stainless steel.

Further, the two entire continuous spiral blades of the double-ended continuous spiral in the conveying section are welded and fixed on the shaft.

Further, the two helical blades of each group of the broken tooth helix in the dewatering section are welded and fixed on the shaft.

The utility model is a screw press dewatering machine used in the breeding industry using the above-mentioned screw shaft structure, comprising the screw shaft used on the above-mentioned breeding and dewatering equipment, and further comprising a screw pressure dewatering deceleration motor, a back pressure spring, a back pressure cone head, a conveying Section screen barrel, dewatering section screen barrel, feed hose, overflow hose and feed connection plate; conveying section screen barrel and dewatering section screen barrel are installed on the frame and arranged in the middle of the screw press dewatering body in turn. Location; the upper end of the screen barrel in the conveying section is provided with a feed port, and the bottom of the screen barrel in the dewatering section is provided with a mud outlet; both ends of the screw shaft are installed on the bearing seat through bearings, and the bearing seat is installed on the frame; the conveying section of the screw shaft The dewatering section and the conveying section are respectively located on the central axis of the screen barrel of the conveying section and the screen barrel of the dewatering section; on the end shaft head of the screw shaft, the outermost end is connected with a screw pressure dewatering gear motor, and the inner side is sequentially provided with a spring top plate and a back pressure spring. and the back pressure cone head; the spring top plate is fixed on the frame, and the back pressure cone head is connected with the back pressure spring; the feed connection plate is fixed at the front end of the screw press dehydrator; the feed connection plate is provided with a mud inlet; the conveying section The feed port at the upper end of the front of the screen barrel is connected to the mud feed port on the feed connection plate through a feed hose.

Further, an overflow port is also provided on the feed connection plate; the overflow port under the feed port at the upper end of the front part of the sieve barrel of the conveying section is connected with the overflow port on the feed connection plate through an overflow hose; The hose is located below the feed hose.

Further, there are protruding teeth on the inner wall of the screen barrel of the dewatering section, and the protruding teeth are just embedded in the discontinuity of the discontinuous spiral to prevent the material from accumulating in the discontinuous part of the spiral blade and causing blockage.

Further, the filtration accuracy of the screens of the screen barrels of the dewatering section and the screen barrels of the conveying section, that is, the aperture size of the screen, is 0.5-0.75 mm.

The beneficial effects of the present utility model:

The screw shaft structure used on the aquaculture dehydration equipment of the utility model is aimed at the defects of high processing cost, high processing difficulty, unstable water content of the mud, and easy shaft blockage of the screw shaft on the existing aquaculture dehydration equipment on the market. On the basis of the popular common screw shaft in the market, combined with the company's experience in sludge treatment equipment, it was developed for the uneven concentration of manure in the aquaculture industry. Compared with the previous helical shaft structure, it has the advantages of low processing cost, simple processing, timely adjustment for the phenomenon of uneven concentration, improved dehydration performance, effective reduction of mud moisture content, and not easy to block the shaft.

The screw shaft structure and screw press dehydrator used on the breeding dehydration equipment of the present utility model adopts the structure of double screw propeller shaft and discontinuous shaft, and has the following advantages:

(1) The number of blades of the helical discontinuous shaft is less than that of the standard structure of the helical shaft, the welding workload is less, and the cost is lower;

(2) In view of the uneven concentration of feces, the spiral discontinuous shaft can adjust the state of the sludge in the dewatering body through the special structure of the discontinuous shaft part (existence of discontinuities), reduce the moisture content of the sludge, and make the sludge contain water. rate remains stable;

(3) In view of the phenomenon that the material is easy to wrap around the spiral blades, the spiral discontinuous shaft has been optimized at the fracture of the feed end of each discontinuous blade. The blade has a cutting function, which can effectively cut off long fibers and other sundries during rotation, prevent the occurrence of clogging of the screw shaft, quickly filter large particles and long fibers, and effectively improve the equipment capacity.

Description of drawings

Fig. 1 is the structural representation of the helical shaft structure used on a kind of culturing dehydration equipment of the present utility model;

Figure 2 is a schematic structural diagram of the screw press dehydrator used in the breeding industry in the present invention.

In the figure: 1. Shaft; 2. Shaft head; 11. Interruption; 12. Blade; 13. Double-ended continuous spiral; 13a, 13b, double-ended continuous spiral blade; 14. Broken tooth spiral; 14a, 14b, broken tooth Spiral blade; 15, convex teeth; A, conveying section; B, dehydration section; G, material advancing direction;

21. Screw pressure dehydration gear motor; 22. Spring top plate; 23. Back pressure spring; 24. Back pressure cone; 25. Screen barrel in dehydration section; 26. Screen barrel in conveying section; material connecting plate; 29, screwing screw shaft; 30, overflow hose.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figure 1, a kind of screw shaft structure used on aquaculture dehydration equipment (screw press dehydrator) of the present utility model, it adopts the structure of double helix propeller shaft (conveying section) plus interrupted shaft (extrusion section): the The screw shaft includes shaft heads 2 at both ends, and a long and long shaft 1 in the middle. The long and long shaft 1 in the middle is divided into a conveying section A and a dehydrating section B; The helical blades are two continuous helical blades (that is, double-headed continuous helical blades 13a, 13b) that are mirror-symmetrically arranged around the axis; The helical blades of the helix (broken-tooth helix 14) are single-piece, and are arranged intermittently in groups of two, and the two helical blades of each group (that is, the broken-toothed helical blades 14a, 14b) are mirror-symmetrically arranged around the axis; That is, the dewatering section B of the helical shaft includes a helical section with helical blades and a discontinuity 11 without helical blades (there is a discontinuity 11 between two adjacent helical sections). Each helical blade of each group of the broken tooth helix 14 has two front and rear fractures (ie, front and rear ends). A sharp knife edge 12 is provided at the fracture of the front end (front feeding end) of each helical blade (ie, the helical blade 14a, 14b) of each group of the tooth-breaking helix 14.

The shaft 1 of the screw shaft of the present invention and the double-ended continuous helix 13 and the broken tooth helix 14 on the shaft 1 are all made of stainless steel. The two entire continuous helical blades (ie, the double-ended continuous helical blades 13 a and 13 b ) of the double-ended continuous helical screw 13 in the conveying section A are welded and fixed on the shaft. In the dehydration section B, the two helical blades of each group of the broken-tooth helical 14 (ie, the broken-toothed helical blades 14a, 14b) are welded and fixed on the shaft.

Structural design and advantages of the screw shaft (screw pressing screw shaft 29) used on the aquaculture dehydration equipment of the present invention:

(1) The screwing screw shaft 29 adopts the structure of a double screw propeller shaft (conveying section) plus an interrupted shaft (extrusion section): the screwing screw shaft 29 includes shaft heads 2 at both ends, and a long shaft 1 in the middle , the middle long shaft 1 is divided into a conveying section A and a dehydrating section B; the conveying section A adopts a double-ended continuous spiral 13, and the spiral blades of the double-ended continuous spiral 13 are two whole continuous spirals arranged mirror-symmetrically around the axis Blades (that is, double-ended continuous helical blades 13a, 13b); dewatering section B (extrusion section) adopts an intermittent helix (also called broken-tooth helix 14), and the helical blade of the discontinuous helix (broken-toothed helix 14) is a single The two spiral blades of each group (ie, the broken-tooth spiral blades 14a, 14b) are arranged in a mirror-symmetrical manner with the axis as the center; that is, the dewatering section of the screw-pressing screw shaft 29 B includes a helical section with a helical blade and a discontinuity 11 without a helical blade (there is a discontinuity 11 between two adjacent helical sections); as shown in Figures 1 and 2, the material enters the mud inlet from the right side Entering the screen barrel 26 of the conveying section, under the action of the screw propulsion of the double-ended continuous screw 13, the material is continuously pushed forward along the material advancing direction G shown in Figure 1, and reaches the broken tooth screw 14 in the screen barrel 25 of the dehydration section At the discontinuity 11, since there is no helical surface (no helical blade) at the discontinuity 11, the material accumulates at the discontinuity 11, and will not be continuously pushed to the next helical section (dehydration) until the accumulation reaches a certain level and sufficient pressure is formed. where the helical blades are provided on the helical shaft 29 of segment B). Due to the existence of the discontinuity 11, the discontinuous screw (broken tooth screw 14) has a higher working speed, and can adapt to changes in feed speed and feed concentration. The drop is of great significance; that is to say, in view of the uneven concentration of manure, the spiral discontinuous shaft can adjust the state of the sludge in the dewatering body through the special structure of the discontinuous shaft part (the existence of the discontinuity 11), and reduce the water content of the sludge. On the other hand, the intermittent screw (broken tooth screw 14) can handle viscous and other difficult-to-handle materials.

(2) The dehydration section B (extrusion section) adopts an intermittent spiral, because its spiral blades are monolithic and intermittent in groups (sections and sections) set separately (intermittently), so it is also called intermittent spiral. Tooth helix 14; each helical blade of each group of broken tooth helix 14 has two front and rear fractures (ie, front and rear ends), and the material is between the rear fracture of the former helical blade and the front fracture of the latter helical blade The discontinuity of the 11 gathers to form a "soft extrusion" area. Only when the materials are squeezed with each other to achieve sufficient pressure can the materials be pushed forward and conveyed, thus greatly improving the dehydration effect. However, such a structure also makes it easy for long fibers, coarse fibers or other debris to hang at the fractures and discontinuities of the spiral blades, and the continuous enrichment of materials leads to difficulty or no material discharge. The broken-tooth screw 14 is optimized at the feed end fracture of each helical blade, and each screw blade of each group of the broken-toothed screw 14 (ie, the broken-tooth helical blades 14a, 14b) is provided with a front feed end fracture. The sharp blade 12 has a cutting function, and the sharp blade 12 (cut) can effectively cut off long fibers and other sundries during rotation, preventing the machine from being blocked and stuck.

(3) The conveying section A adopts the double-head continuous screw 13 to increase its effective compression area, enhance the axial conveying capacity, and achieve the purpose of rapid discharge.

Figure 2 shows a screw press dehydrator used in the aquaculture industry using the above-mentioned screw shaft structure, which includes the screw shaft (that is, the screw pressure screw shaft 29) used on the above-mentioned aquaculture dehydration equipment, and also includes a screw pressure dehydration gear motor. 21. Spring top plate 22, back pressure spring 23, back pressure cone 24, dewatering section screen barrel 25, conveying section screen barrel 26, feed hose 27, overflow hose 30 and feed connection plate 28; convey section screen The barrel 26 and the screen barrel 25 of the dewatering section are installed on the frame, and are arranged in the middle and front of the screw press dewatering body 2 in sequence; both ends of the screw shaft 29 are installed on the bearing seat through bearings, and the bearing seat is installed on the frame. The conveying section A and the dewatering section B of the screw press screw shaft 29 are respectively located on the central axis in the conveying section screen barrel 26 and the dewatering section screen barrel 25; The bottom part of the end of 25 is provided with a mud outlet; on the end shaft head of the screw pressure screw shaft 29, the outermost end is connected with a screw pressure dehydration deceleration motor 21, and the inner side is sequentially provided with a spring top plate 22, a back pressure spring 23 and a back pressure cone head 24 The spring top plate 22 is fixed on the frame; the back pressure cone head 24 is connected with the back pressure spring 23 and can slide on the screw pressure screw shaft 29; There are two upper and lower flange ports, of which the upper one is the mud inlet and the lower one is the overflow port; Mud port connection. The overflow port below the feed port at the front upper end of the screen barrel 26 of the conveying section is connected to the overflow port on the feed connection plate 28 through an overflow hose 30 ; There are convex teeth 15 on the inner wall of the screen barrel 25 of the dewatering section. The convex teeth 15 are just embedded in the discontinuity 11 of the discontinuous helix (broken tooth helix 14). blocked. The filtration accuracy of the screens of the screen barrels 25 in the dewatering section and the screen barrels 26 in the conveying section, that is, the aperture size of the screens is 0.5 to 0.75 mm.

The working principle of the screw press dehydrator: the aquaculture wastewater enters the screen barrel 26 of the conveying section and the screen barrel 25 of the dewatering section in turn through the flange port (mud inlet) on the feed connecting plate 28, and the spring top plate 22 and the back pressure spring 23. And under the action of the back pressure cone 24, pressure is formed between the sieve barrel 25 of the dehydration section, the sieve barrel 26 of the conveying section, and the screw-pressing screw shaft 29, and the filtrate is squeezed from the gap (sieve hole) on the surface of the sieve barrel by the pressure. out, the filter residue is sent to the mud outlet through the screw press conveying shaft (screw pressing screw shaft 29).

The screw press screw shaft 29 of the screw press dewatering machine adopts the structure of double screw propulsion (conveying section) plus interrupted shaft (extrusion section), which can treat aquaculture wastewater with uneven manure concentration. (Existence of discontinuities) Adjust the state of sludge in the dewatering body, reduce the moisture content of the sludge, and keep the moisture content of the sludge stable; at the same time, the sharp blade at the front end of the helical blade of the broken tooth helix can effectively cut off long fibers and Other sundries can prevent the screw shaft from being blocked and stuck, and effectively improve the production capacity of the equipment.

Claims (8)

1. The utility model provides a screw axis structure of using on breed dewatering equipment which characterized in that, it adopts the structure of double helix propulsion shaft with intermittent type axle: the spiral shaft comprises shaft heads at two ends and a shaft with a long middle part, and the shaft with the long middle part is divided into a conveying section and a dewatering section; the conveying section adopts a double-head continuous spiral, and the spiral blades of the double-head continuous spiral are two whole continuous spiral blades which are arranged in a mirror symmetry mode by taking the shaft as the center; the dewatering section adopts an interrupted screw, also called a broken tooth screw, the screw blades of the interrupted screw are in a single-piece type, two screw blades are arranged in a group, and the two screw blades of each group are arranged in a mirror symmetry mode by taking the shaft as the center; that is, the dewatering section of the screw shaft includes a screw section provided with screw blades and a discontinuity where the screw blades are not provided; each helical blade of each broken tooth helical group has a front fracture and a rear fracture; the front end fracture of each helical blade of each broken tooth helical group is provided with a sharp cutting edge.

2. The screw shaft structure for use in aquaculture dewatering equipment of claim 1, wherein the shaft of said screw shaft and the double-ended continuous screw and the broken-tooth screw on the shaft are made of stainless steel.

3. A screw shaft structure for use in a dewatering apparatus for farm animals according to claim 1 or 2, wherein two continuous screw blades of the conveying section double-ended continuous screw are welded and fixed to the shaft.

4. The screw shaft structure for use in aquaculture dewatering equipment as recited in claim 1 or 2, wherein the two screw blades of each set of the broken-tooth screw of the dewatering section are welded and fixed to the shaft.

5. A screw press dehydrator for the breeding industry, which adopts the screw shaft structure as claimed in any one of claims 1 to 4, and is characterized by comprising the screw shaft as claimed in any one of claims 1 to 4, a screw press dehydration speed reduction motor, a back pressure spring, a back pressure conical head, a conveying section sieve barrel, a dehydrating section sieve barrel, a feeding hose, an overflow hose and a feeding connecting plate; the conveying section sieve barrel and the dewatering section sieve barrel are arranged on the frame and are sequentially arranged at the front and rear positions in the middle of the spiral squeezing dewatering body; the upper end of the front part of the screen barrel of the conveying section is provided with a feed inlet, and the lower part of the tail end of the screen barrel of the dewatering section is provided with a sludge outlet; two ends of the spiral shaft are arranged on bearing seats through bearings, and the bearing seats are arranged on the rack; the conveying section and the dewatering section of the spiral shaft are respectively positioned on the central axis in the conveying section sieve barrel and the dewatering section sieve barrel; the tail end of the screw shaft is connected with a screw pressure dehydration speed reducing motor, and a spring top plate, a back pressure spring and a back pressure conical head are sequentially arranged close to the inner side; the spring top plate is fixed on the frame, and the back pressure conical head is connected with the back pressure spring; the feeding connecting plate is fixedly arranged at the front end of the spiral squeezing dehydrator; a mud inlet is arranged on the feeding connecting plate; the feed inlet at the upper end of the front part of the screen barrel at the conveying section is connected with a sludge inlet on the feed connecting plate through a feed hose.

6. The screw press dehydrator for use in aquaculture of claim 5, wherein the feeding connection plate is further provided with an overflow port; an overflow port below a feed port at the upper end of the front part of the conveying section sieve barrel is connected with an overflow port on the feed connecting plate through an overflow hose; the overflow hose is arranged below the feeding hose.

7. The screw press dehydrator for farming industry of claim 5 or 6 wherein the inner wall of the screen barrel of the dehydrating section is provided with convex teeth which are just embedded in the intermittent part of the intermittent screw.

8. The screw press dehydrator for use in aquaculture as claimed in claim 5 or 6, wherein the screen mesh of the screen barrel of the dehydrating section and the screen barrel of the conveying section has a filtering precision, i.e. the aperture size of the screen mesh is 0.5-0.75 mm.

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