Spiral ladder type sludge interception device with pre-screening function

Abstract

The present application provides a kind of spiral ladder type sludge interception device with pre-screening function, belong to sewage treatment technical field, including base member, spiral ladder interception component, outer centrifugal cone assembly, inner screw rod assembly, top filter disc component, slow-release overflow assembly, sludge discharge assembly, with spiral ladder interception component as the core basis, in the inside of central solid cylinder is screwed with the centrifugal cone that can automatically rotate, and in the inside of centrifugal cone is screwed with hollow shaft, and hollow shaft and centrifugal cone differential speed same direction rotation transmission connection, can first enter the sewage in the centrifugal cone in hollow shaft to the centrifugal operation, and after sludge discharge assembly can accelerate the discharge of sludge separated by centrifugation, top filter disc component is fixed in the inner upper end of centrifugal cone, both can be filtered again after centrifugal separation sewage, also can cooperate with the use of slow-release overflow assembly and intermittently introduced into the uppermost spiral ladder shell, realize spiral type ladder interception filtering.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a spiral stepped sludge interception device with pre-screening function. Background Technology

[0002] In municipal sewage treatment, industrial wastewater treatment, and river dredging, efficient separation of suspended sludge from sewage is a core step in achieving water purification. If sludge (including organic sludge, inorganic particles, and fibrous impurities) is not promptly removed, it can lead to blockages in downstream processing pipes and equipment. Furthermore, fibers and hard particles can wear down pumps, increasing maintenance costs. Additionally, it may increase the load on subsequent processes, and unseparated fine sludge particles can reduce the purification efficiency of biological treatment tanks.

[0003] While the current mainstream linear stepped interception mechanism has the advantages of simple structure and low cost, it has revealed the following significant defects in actual operation:

[0004] 1. Prone to clogging and frequent maintenance: When sewage flows continuously through the straight steps in a constant straight path, large particles of sludge and impurities can easily clog the filter holes of the steps, requiring frequent shutdowns for cleaning.

[0005] 2. Low space utilization: The horizontally extending stepped structure occupies a large area and is difficult to adapt to compact renovation projects. Summary of the Invention

[0006] The purpose of this invention is to provide a spiral stepped sludge interception device with pre-screening function. Based on the spiral stepped interception component with a spiral structure, it is combined with a centrifugal cone and a hollow shaft that maintain a relative speed difference and rotate in the same direction. During the centrifugal rotation of the centrifugal cone, the slow-release flow component in the top filter plate component and the uppermost set of spiral stepped shells are intermittently coordinated. This can achieve efficient multi-stage interception and filtration of sewage after sludge removal without reducing the planar space occupied or the step path.

[0007] The objective of this invention is achieved through the following technical solution: a spiral stepped sludge interception device with pre-screening function, comprising a spiral stepped interception component, an outer centrifugal cone assembly, an inner spiral rod assembly, a top filter plate assembly, and a slow-release flow assembly. The spiral stepped interception component includes a central solid cylinder, the outer centrifugal cone assembly includes a centrifugal cone, the inner spiral rod assembly includes a side connecting pipe, the top filter plate assembly includes a slow-release groove, and the slow-release flow assembly includes a flow hole and a spherical groove.

[0008] The outer wall of the central solid cylinder is arranged with spiral stepped shells of varying heights. Each set of spiral stepped shells has a trap hole on one side wall. The centrifugal cone is screwed into the inner cavity of the central solid cylinder. A mud discharge pipe is fixed at the bottom of the central solid cylinder. The bottom outlet of the centrifugal cone is screwed into the top inlet of the mud discharge pipe.

[0009] A hollow shaft is vertically screwed into the middle of the centrifugal cone. Conical spiral blades are fixed on the outside of the hollow shaft, maintaining a certain distance from the inner wall of the centrifugal cone. Side connecting pipes are arranged and connected to the side wall of the hollow shaft. The bottom end of the hollow shaft passes through the mud discharge pipe and is connected to the centrifugal cone for differential and co-rotation transmission.

[0010] A top filter plate is fixed to the upper part of the centrifugal cone. The slow-release tank is fixed to the outside of the top filter plate in a ring. The flow hole is opened in the bottom body of the slow-release tank. A sealing plate is slidably connected downwards on the side wall of the slow-release tank and the position opposite to the flow hole. A passive ball seat is fixed at the bottom of the sealing plate. The spherical groove is located at the top of the inner end of the uppermost set of spiral stepped shells.

[0011] The process of using the technical solution of the present invention is as follows:

[0012] The top inlet of the hollow shaft is connected to the external sewage inlet.

[0013] After the mechanism that drives the centrifugal cone to rotate is started, the centrifugal cone can be driven to rotate continuously in one direction. At the same time, the hollow shaft and the centrifugal cone are connected by differential rotation in the same direction, which can form the conical spiral blades and the side connecting pipe rotating in the same direction at a relatively slower speed relative to the centrifugal cone.

[0014] Wastewater entering through the hollow shaft will pass through the through holes in each set of side connecting pipes into the inner cavity of the centrifugal cone. Since the side connecting pipes are located above the conical sidewall of the centrifugal cone, as wastewater continues to enter the inner cavity of the centrifugal cone from the hollow shaft, under the action of centrifugal force, the denser sludge in the wastewater will be thrown and adhered to the inner wall of the centrifugal cone, and will form potential energy to move downward along the conical inner wall of the centrifugal cone. After the sludge is removed, the less dense part of the wastewater will be thrown obliquely upward by the conical inner wall of the centrifugal cone, thus separating the sludge in the wastewater.

[0015] After the sludge accumulates to a certain thickness on the inner wall of the centrifugal cone, the hollow shaft drives the conical spiral blades to rotate, which can scrape off the sludge adhering to the inner wall of the centrifugal cone. The sludge is then transported downwards through the rotation of the conical spiral blades and finally discharged outwards through the sludge discharge pipe.

[0016] After the sludge is removed, the less dense portion of the wastewater flows upward and is filtered again by the top filter disc before flowing into the slow release tank surrounding the top filter disc.

[0017] As the centrifugal cone continues to rotate, it drives the top filter plate and the slow-release tank to rotate synchronously. When the slow-release tank rotates to the position where the passive ball seat and the spherical groove meet, that is, when the flow hole rotates to the outline of the uppermost set of spiral stepped shells, the sliding tangential engagement between the spherical groove and the passive ball seat can drive the sealing plate to move upward and open the flow hole. In other words, the sealing plate can only be opened after the flow hole rotates to be directly opposite the uppermost set of spiral stepped shells, thus achieving the purpose of intermittent sewage discharge to the uppermost set of spiral stepped shells.

[0018] As the wastewater after sludge removal is continuously supplied to the uppermost set of spiral stepped shells, under its own gravity, the wastewater passes through each set of interception holes from top to bottom and enters different spiral stepped shells, forming a spiral stepped filtration of the wastewater.

[0019] By adopting the above technical solution, the present invention can achieve the following beneficial effects:

[0020] (1) This invention is not a traditional straight-line stepped filtration, but a spiral stepped filtration composed of a series of spiral stepped shells from top to bottom with the central solid cylinder as the reference. Within a certain range of height space and without occupying the plane space, the spiral structure forms an extension of the sewage flow path in a limited space. Without setting a long straight path, it can form a step-like interception and filtration of sewage. The superposition of the spiral structure along the vertical direction can greatly reduce the floor area and greatly improve the unit space treatment capacity.

[0021] (2) The present invention is also provided with a centrifugal cone and a hollow shaft connected by differential rotational transmission, which can pre-treat the sewage before it enters the spiral stepped structure composed of each set of spiral stepped shells. By utilizing the centrifugal force formed by the conical sidewall of the centrifugal cone, combined with the scraping and downward conveying effect of the conical spiral blades on the inner wall of the centrifugal cone, the sludge in the sewage can be removed in advance. This not only improves the treatment effect, but also protects the interception holes opened on the sidewall of each set of spiral stepped shells, preventing them from being blocked, thereby improving the overall utilization rate of the equipment and reducing the frequency of manual maintenance.

[0022] (3) Furthermore, the present invention also has a top filter plate component fixed on the upper end of the inner wall of the centrifugal cone. The top filter plate can not only filter the wastewater after centrifugation, but also form a temporary storage for the wastewater discharged from the centrifugal cone by the structure of the top filter plate and the slow release tank. When the top filter plate and the slow release tank rotate with the centrifugal cone, the spherical groove set inside the uppermost set of spiral stepped shells and the passive ball seat at the bottom of the elastic downward sealing plate form a sliding tangential cooperation, which can achieve the purpose of intermittently supplying wastewater in the slow release tank to the spiral stepped shell. This eliminates the phenomenon of water flow short circuit caused by the wastewater flowing rapidly down the single path of the spiral channel when continuously supplying water, forming a pulse water flow, eliminating the dead angle of filtration, and improving the utilization rate of the stepped space. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the base component and the spiral stepped retaining component of the present invention;

[0026] Figure 3 This is a schematic diagram of the central fixed cylinder portion of the present invention;

[0027] Figure 4 This is a schematic diagram of the sewage receiving box part of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the external centrifugal cone assembly of the present invention;

[0029] Figure 6 This is a schematic diagram showing the installation position of the internal helical rod assembly and the centrifugal cone of the present invention;

[0030] Figure 7 This is a schematic diagram of the transmission structure between the internal helical rod assembly and the drive spindle of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the water inlet elbow part of the present invention;

[0032] Figure 9 This is a schematic diagram showing the position and structure of the top filter disc component and the water inlet elbow of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the top filter disc component of the present invention;

[0034] Figure 11 This is a schematic diagram of the structure of the slow-release overcurrent assembly of the present invention;

[0035] Figure 12 This is a schematic diagram of the structure of the passive ball seat and the spherical groove of the present invention;

[0036] Figure 13 This is a schematic diagram of the sludge discharge component of the present invention.

[0037] Figure label:

[0038] 1. Base component; 2. Spiral stepped interception component; 3. Outer centrifugal cone assembly; 4. Inner spiral rod assembly; 5. Top filter plate component; 6. Slow-release flow assembly; 7. Sludge discharge assembly; 101. Base frame; 102. Bottom cover; 201. Central fixed cylinder; 202. Spiral stepped shell; 203. Interception hole; 204. Side guard plate; 205. Wastewater receiving tank; 206. Transmission position; 207. Sewage pipe; 301. Bottom fixed swivel seat; 302. Centrifugal pulley; 303, drive motor; 304, reducer; 305, drive shaft; 306, centrifugal drive pulley; 307, centrifugal belt; 308, centrifugal cone; 309, sludge discharge pipe; 310, bottom insert swivel seat; 311, sludge discharge port; 312, replacement ball cover; 401, hollow shaft; 402, conical spiral blade; 403, side connecting pipe; 404, wastewater outlet; 405, shaft base; 406, bottom helical gear; 407. 408. Gearbox housing; 409. Gearbox pinion; 410. Gearbox gear; 411. Coaxial gear; 412. Angled bracket; 413. Top mounting plate; 414. Shaft top seat; 415. Stand; 416. Inlet elbow; 417. Top insert swivel seat; 501. Top filter disc; 502. Top filter hole; 503. Center sleeve; 504. Guide ramp; 505. Slow release tank; 601. Flow hole; 602. Sliding seat; 60 3. Sliding column; 604. Sealing plate; 605. Top connecting plate; 606. Compression spring; 607. Passive ball seat; 608. Inner fixed seat; 609. Spherical groove; 610. Guide slope; 701. Side seat; 702. Mud discharge auger; 703. Inner rotating seat; 704. Transmission rotating seat; 705. Transmission shaft; 706. Central large gear; 707. Transmission small gear; 708. Transmission bevel gear; 709. Rotating bevel gear; 710. Inner protective cover. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] like Figures 1-13 The spiral stepped sludge interception device with pre-screening function is shown. The outer wall of the central solid cylinder 201 in the spiral stepped interception component 2 is arranged with spiral stepped shells 202 of varying heights. Each set of spiral stepped shells 202 has interception holes 203 on one side wall, which can realize the filtration and flow of sewage from top to bottom in each set of spiral stepped shells 202. The centrifugal cone 308 is screwed into the inner cavity of the central solid cylinder 201. The lower outer wall of the central solid cylinder 201 is provided with a mechanism to drive the centrifugal cone 308 to rotate. The outer bottom of the central solid cylinder 201 is fixed with a sludge discharge pipe 309. The bottom outlet of the centrifugal cone 308 is screwed into the top inlet of the sludge discharge pipe 309.

[0042] A hollow shaft 401 is vertically screwed into the inner center of the centrifugal cone 308. A conical spiral blade 402 is fixed on the outside of the hollow shaft 401, maintaining a certain distance from the inner wall of the centrifugal cone 308. A side connecting pipe 403 is arranged and connected to the side wall of the hollow shaft 401, and is located above the conical side wall of the centrifugal cone 308. The bottom end of the hollow shaft 401 passes through the mud discharge pipe 309 and is connected to the centrifugal cone 308 for differential and co-rotational transmission.

[0043] A top filter plate 501 is fixedly connected to the upper part of the centrifugal cone 308. The top end of the hollow shaft 401 passes through the middle of the top filter plate 501 and extends to the top of the centrifugal cone 308. The slow-release tank 505 is fixedly connected to the outside of the top filter plate 501 in a circumferential manner and does not interfere with the rotation of the centrifugal cone 308 relative to the central fixed cylinder 201. The flow hole 601 is opened in the bottom body of the slow-release tank 505. The side wall of the slow-release tank 505 and the position directly opposite the flow hole 601 are slidably connected to the sealing plate 604. The bottom of the sealing plate 604 is fixed with a passive ball seat 607. The spherical groove 609 is located at the inner top end of the uppermost set of spiral stepped shells 202. When the centrifugal cone 308 drives the top filter plate component 5 to rotate continuously, the elastic tangential cooperation formed by the passive ball seat 607 and the spherical groove 609 can form the intermittent opening and closing action of the sealing plate 604.

[0044] The working principle is as follows:

[0045] The top inlet of the hollow shaft 401 is connected to the external sewage inlet, and the external sewage inlet does not interfere with the rotation of the hollow shaft 401.

[0046] After the mechanism that drives the centrifugal cone 308 to rotate is started, the centrifugal cone 308 can be driven to rotate continuously in one direction. At the same time, the hollow shaft 401 is connected to the centrifugal cone 308 to rotate in the same direction at a different speed, which can form the conical spiral blade 402 and the side connecting pipe 403 to rotate in the same direction at a relatively slower speed relative to the centrifugal cone 308.

[0047] Wastewater entering through the hollow shaft 401 will enter the inner cavity of the centrifugal cone 308 through the through holes opened in each set of side connecting pipes 403. Since the side connecting pipes 403 are located above the conical side wall of the centrifugal cone 308, as wastewater continues to enter the inner cavity of the centrifugal cone 308 from the hollow shaft 401, under the action of centrifugal force, the sludge with higher density in the wastewater will be thrown and adhered to the inner wall of the centrifugal cone 308, and will form potential energy to move downward along the conical inner wall of the centrifugal cone 308. After the sludge is removed, the less dense part of the wastewater will be thrown obliquely upward by the conical inner wall of the centrifugal cone 308, thus forming the separation of sludge in the wastewater.

[0048] The outer edge of the conical spiral blade 402 is spaced with the inner wall of the centrifugal cone 308 at all points, preferably 10 mm. After the sludge on the inner wall of the centrifugal cone 308 accumulates to a certain thickness, the hollow shaft 401 drives the conical spiral blade 402 to rotate, which can scrape off the sludge attached to the inner wall of the centrifugal cone 308. The sludge is then transported downwards through the rotation of the conical spiral blade 402 and finally discharged outwards through the sludge discharge pipe 309.

[0049] After the sludge is removed, the less dense part of the wastewater flows upward and is filtered again by the top filter plate 501, and then flows into the slow release tank 505 surrounding the top filter plate 501.

[0050] As the centrifugal cone 308 continues to rotate, the top filter plate 501 and the slow-release tank 505 rotate synchronously. When the slow-release tank 505 rotates to the position where the passive ball seat 607 and the spherical groove 609 are engaged, that is, when the flow hole 601 rotates to the outline range of the uppermost set of spiral stepped shells 202, the sliding tangential engagement between the spherical groove 609 and the passive ball seat 607 can drive the sealing plate 604 to move upward, opening the flow hole 601. In other words, the sealing plate 604 can only open the flow hole 601 after it rotates to be directly aligned with the uppermost set of spiral stepped shells 202, thus achieving the purpose of intermittent sewage discharge to the uppermost set of spiral stepped shells 202. This can slow down the flow rate of sewage from the centrifugal cone 308 to the spiral stepped shells 202 and improve the utilization rate of each set of interception holes 203.

[0051] Since the spiral stepped shells 202 are arranged spirally on the outer wall of the central solid cylinder 201 with a certain height difference, as the sewage after sludge removal is continuously supplied to the uppermost set of spiral stepped shells 202, under the action of its own gravity, the sewage can pass through each set of interception holes 203 from top to bottom and enter different spiral stepped shells 202, forming a spiral stepped filtration of sewage.

[0052] The number of spiral stepped shells 202 is determined by the height of the central solid cylinder 201. The higher the height of the central solid cylinder 201, the greater the number of spiral stepped shells 202, the greater the height difference, and the greater the gravitational potential energy generated by the sewage flowing from top to bottom. Thus, the stepped filtration effect of each set of spiral stepped shells 202 can be formed by utilizing only the height space. Compared with the traditional linear stepped filtration mechanism, it can intercept and filter sewage in a stepped manner while greatly reducing the planar space occupied.

[0053] After the spiral stepped shell 202 has been used for a period of time, the intercepted sludge will be deposited on the inner bottom surface of the spiral stepped shell 202, so the spiral stepped shell 202 needs to be cleaned regularly.

[0054] The specific structure of the spiral stepped intercepting component 2 and the base component 1 at its bottom end is as follows: Figure 2 , Figure 3 and Figure 4 As shown, the base frame 101 serves as the mounting base for the device, and the bottom cover 102 is fixedly attached to the top of the base frame 101.

[0055] Side guard plate 204 is fixedly connected to the upper end of the outer side wall of the spiral stepped shell 202 except the uppermost layer, to prevent sewage from overflowing between the spiral stepped shells 202. The top of the bottom cover 102 is fixedly installed with a sewage receiving box 205, which is connected to the bottom set of spiral stepped shells 202. It is used to receive sewage that has been intercepted and filtered by the interception holes 203 on one side of all the spiral stepped shells 202. The bottom end of the sewage receiving box 205 is connected to a sewage discharge pipe 207. The outlet pipe of the sewage discharge pipe 207 passes through the side wall of the bottom cover 102 and extends out of the bottom cover 102. It is used to uniformly discharge the sewage that has been intercepted and filtered by all the spiral stepped shells 202 to the next process. When necessary, a valve can also be installed in the outlet pipe of the sewage discharge pipe 207.

[0056] Furthermore, the diameter of the interception holes 203 opened in each set of spiral stepped shells 202 decreases from top to bottom, so as to form a stepped interception for sewage filtration.

[0057] The transmission position 206 is provided on one side of the bottom wall of the central fixed cylinder 201 to provide space for the mechanism that drives the centrifugal cone 308 to rotate.

[0058] The specific structures of the outer centrifugal cone assembly 3 and the inner spiral rod assembly 4 are as follows: Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the bottom fixed mounting base 301 is arranged and fixed at the bottom of the inner cavity of the central fixed cylinder 201, and the lower outer end of the centrifugal cone 308 is screwed to the bottom fixed mounting base 301. The number of bottom fixed mounting bases 301 is determined by being able to stably support the rotation of the centrifugal cone 308.

[0059] A drive motor 303 is fixedly mounted on the top of the base frame 101. A reducer 304 is fixedly mounted in the main body of the output end of the drive motor 303. The rotating shaft of the drive motor 303 is fixedly connected to the input shaft of the reducer 304. A drive spindle 305 is fixedly connected inside the output shaft of the reducer 304. A centrifugal drive pulley 306 is inserted into the top of the drive spindle 305. A centrifugal pulley 302 is sleeved and fixed on the lower end of the outside of the centrifugal cone 308. A centrifugal belt 307 is sleeved and installed between the centrifugal drive pulley 306 and the centrifugal pulley 302. Sufficient space is left between the two adjacent sets of base fixed seats 301 to provide space for the transmission between the centrifugal pulley 302 and the centrifugal drive pulley 306.

[0060] By starting the drive motor 303, the input shaft of the reducer 304 is driven to rotate. The input shaft of the reducer 304 drives the output shaft to rotate, which in turn drives the drive spindle 305 and the centrifugal drive pulley 306 to rotate. The centrifugal drive pulley 306 can drive the centrifugal pulley 302 and the centrifugal cone 308 fixed to the centrifugal pulley 302 to form a centrifugal rotation action through the centrifugal belt 307.

[0061] The main body of the sludge discharge pipe 309 is fixedly connected to the inner frame of the base frame 101. The bottom plug-in screw seat 310 is fixedly installed at the inlet end of the sludge discharge pipe 309. The bottom end of the centrifugal cone 308 is screwed to the bottom plug-in screw seat 310.

[0062] The lower side of the outer end of the sludge discharge pipe 309 is connected to a sludge discharge port 311, which is used to discharge the sludge separated by the centrifugal cone 308.

[0063] The replacement ball cover 312 is fixedly connected to the bottom end of the corner position of the sludge discharge pipe 309 to eliminate the influence of the transmission mechanism inside the sludge discharge pipe 309 on the smoothness of sludge discharge;

[0064] The side wall of the side connecting pipe 403 is provided with sewage outlet holes 404, which are used to discharge the sewage that enters the hollow shaft 401 and each set of side connecting pipes 403 to the top of the cone side wall of the centrifugal cone 308.

[0065] A shaft base 405 is installed and fixed at the bottom of the mud discharge pipe 309. The bottom of the hollow shaft 401 is screwed to the shaft base 405. Only the upper part of the hollow shaft 401 that is connected to each set of side connecting pipes 403 is hollow, while the rest is solid.

[0066] The bottom helical gear 406 is inserted into the bottom end of the hollow shaft 401. The bottom end of the frame of the base body 101 is fixedly installed with a gear shift shaft seat 407. A gear shift shaft 408 is screwed into the gear shift shaft seat 407. The gear shift pinion 409 and the gear shift large gear 410 are both inserted into the gear shift shaft 408, and the gear shift pinion 409 meshes with the bottom helical gear 406. The bottom end of the drive main shaft 305 is fitted with a coaxial gear 411, which meshes with the gear shift large gear 410.

[0067] When the drive spindle 305 drives the centrifugal cone 308 to rotate in the same direction, the drive spindle 305 can also drive the coaxial gear 411 to rotate in the same direction. The coaxial gear 411 drives the large gear 410 to rotate in the opposite direction and slowly relative to the coaxial gear 411. The small gear 409 rotates coaxially with the large gear 410. The bottom helical gear 406 rotates in the opposite direction relative to the small gear 409. Therefore, the hollow shaft 401 can be driven to rotate relatively slowly in the same direction relative to the centrifugal cone 308. This can form both the rapid centrifugal rotation of the centrifugal cone 308 and the relatively slow pushing action of the conical spiral blades 402 in the same direction.

[0068] It should be noted that the transmission diagram between the bottom helical gear 406 and the coaxial gear 411 in the attached figure is only used to illustrate the differential and same-direction rotational transmission connection between the hollow shaft 401 and the centrifugal cone 308. In actual operation, in order to adjust the speed difference between the hollow shaft 401 and the centrifugal cone 308, it can be achieved by changing the transmission ratio between the coaxial gear 411 and the large gear 410 and the transmission ratio between the small gear 409 and the bottom helical gear 406.

[0069] The top plate 413 is fixedly connected to the top of the outer wall of the central cylinder 201 by the inclined bracket 412. The shaft top seat 414 is fixedly connected to the inner end of the top plate 413. The top of the top plate 413 is fixedly connected to the upright seat 415. The upright seat 415 is installed and fixedly installed in the water inlet elbow 416. The outlet end of the water inlet elbow 416 is installed and fixedly installed with the top insertion screw seat 417. The outer side of the hollow shaft 401 is screwed to the shaft top seat 414 and screwed upward into the top insertion screw seat 417. The inlet end of the water inlet elbow 416 is connected to the external sewage supply pipeline, which can supply sewage to the hollow shaft 401 without interfering with the rotation of the hollow shaft 401.

[0070] The specific structures of the top filter disc component 5 and the slow-release flow assembly 6 are as follows: Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, a guide slope 504 is used to bridge the top filter plate 501 and the slow release tank 505. The guide slope 504 slopes from the outer top end of the top filter plate 501 to the inner bottom end of the slow release tank 505, which can form a water passage from the top filter plate 501 to the slow release tank 505.

[0071] A central sleeve 503 is fixedly connected to the inner center of the top filter plate 501. The hollow shaft 401 passes through the central sleeve 503 and is screwed to the shaft top seat 414. The top filter holes 502 are arranged and opened on the bottom surface of the inner cavity of the top filter plate 501 for further interception and filtration of the sewage after centrifugation separation by the centrifugal cone 308.

[0072] The sliding seats 602 are fixed in pairs to the top of the outer side wall of the slow-release tank 505. Each set of sliding seats 602 has a sliding column 603 slidably connected to it. The sealing plate 604 is fixedly connected to the bottom end of the sliding column 603, and the top connecting plate 605 is fixedly connected to the top end of the sliding column 603.

[0073] Each set of sliding columns 603 is fitted with a compression spring 606. One end of the compression spring 606 is fixed to the sliding seat 602, and the other end is fixed to the sealing plate 604. This can form a downward supporting elastic force on the sealing plate 604, so that when the sealing plate 604 moves upward without external force, the sealing plate 604 is in a state of closing the flow hole 601.

[0074] Furthermore, the compression spring 606 is made of stainless steel, which has the function of preventing silt corrosion. In order to improve the service life of the compression spring 606, it is also necessary to maintain it regularly, clean the silt attached to the surface of the compression spring 606, and apply oil for maintenance.

[0075] The uppermost set of spiral stepped shells 202 is internally fixedly connected to an inner base 608, and the inner base 608 and the interception holes 203 opened on its side wall are staggered, which will not affect its interception and filtration efficiency. The spherical groove 609 is opened at the top of the inner base 608, and the inner base 608 has an inlet slope 610 on both sides to facilitate the passive ball seat 607 to cut into the spherical groove 609.

[0076] Preferably, such as Figure 13 As shown, the sludge discharge pipe 309 is also equipped with a sludge discharge assembly 7 that is connected to the centrifugal cone 308, which can improve the efficiency of sludge discharge from the sludge discharge pipe 309.

[0077] The side seat 701 is attached to the outer end of the mud discharge pipe 309. The inner rotating seat 703 is installed and fixed at the inner corner of the mud discharge pipe 309. The two ends of the rotating shaft of the mud discharge auger 702 are rotatably connected to the side seat 701 and the inner rotating seat 703 respectively.

[0078] A transmission hub 704 is installed and fixed in the outer wall of the main body of the mud discharge pipe 309. A transmission shaft 705 is screwed into the transmission hub 704. A transmission pinion 707 is inserted into the top of the transmission shaft 705. A central gear 706 is inserted and fixed outside the bottom end of the centrifugal cone 308, and the transmission pinion 707 meshes with the central gear 706.

[0079] The bottom end of the drive shaft 705 is fitted with a fixed drive bevel gear 708, and one end of the shaft of the sludge discharge auger 702 is fitted with a fixed rotating bevel gear 709. The drive bevel gear 708 and the rotating bevel gear 709 mesh, which allows the central large gear 706 and the drive small gear 707 to cooperate and drive when the centrifugal cone 308 rotates centrifugally. This allows the drive small gear 707 to coaxially drive the rotation of the drive bevel gear 708. The rotation of the drive bevel gear 708 and the rotating bevel gear 709 drives the sludge discharge auger 702 to rotate. The rotating top seat of the sludge discharge auger 702 forms the active conveying of sludge from the corner of the sludge discharge pipe 309 to the sludge discharge port 311.

[0080] Furthermore, since the replacement ball cover 312 has a smooth transition structure, it can eliminate the obstruction problem of the transmission bevel gear 708, the rotating bevel gear 709 and related transmission mechanisms on the inner channel of the mud discharge pipe 309.

[0081] On the other hand, in order to eliminate the influence of silt on the transmission of the transmission bevel gear 708 and the rotating bevel gear 709, an inner protective cover 710 is installed on the inner wall of the sludge discharge pipe 309. The inner protective cover 710 covers the transmission bevel gear 708 and the rotating bevel gear 709 and will not interfere with the engagement of the transmission bevel gear 708 and the rotating bevel gear 709.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral stepped sludge interception device with pre-screening function, comprising a spiral stepped interception component (2), characterized in that: It also includes an outer centrifugal cone assembly (3), an inner spiral rod assembly (4), a top filter plate assembly (5), and a slow-release flow assembly (6); The spiral stepped interception component (2) includes a central solid cylinder (201), the outer centrifugal cone assembly (3) includes a centrifugal cone (308), the inner spiral rod assembly (4) includes a side connecting pipe (403), the top filter plate assembly (5) includes a slow release tank (505), and the slow release flow assembly (6) includes a flow hole (601) and a spherical groove (609). The outer wall of the central solid cylinder (201) is arranged with spiral stepped shells (202). Each set of spiral stepped shells (202) has a trap hole (203) on one side wall. The centrifugal cone (308) is screwed into the inner cavity of the central solid cylinder (201). The bottom of the central solid cylinder (201) is fixed with a mud discharge pipe (309). The bottom outlet of the centrifugal cone (308) is screwed into the top inlet of the mud discharge pipe (309). A hollow shaft (401) is screwed into the middle of the centrifugal cone (308). A conical spiral blade (402) is fixed on the outside of the hollow shaft (401). Side connecting pipes (403) are arranged and connected. On the side wall of the hollow shaft (401), the bottom end of the hollow shaft (401) passes through the sludge discharge pipe (309) and is connected to the centrifugal cone (308) for differential and co-rotation transmission. The upper part of the centrifugal cone (308) is fixedly connected to the top filter plate (501). The slow release tank (505) is fixedly connected to the outside of the top filter plate (501). The flow hole (601) is opened at the bottom end of the slow release tank (505). The side wall of the slow release tank (505) is slidably connected to the sealing plate (604) with downward springing. The bottom of the sealing plate (604) is fixed with a passive ball seat (607). The spherical groove (609) is located at the top end of the uppermost set of spiral stepped shells (202).

2. The spiral stepped sludge interception device with pre-screening function according to claim 1, characterized in that: The bottom end of the spiral stair interception component (2) is provided with a base component (1). The base component (1) includes a base frame (101) and a bottom cover (102). The bottom cover (102) is fixed to the top of the base frame (101).

3. The spiral stepped sludge interception device with pre-screening function according to claim 2, characterized in that: The spiral stepped interception component (2) also includes a side guard plate (204) and a transmission position (206). The side guard plate (204) is fixedly connected to the upper end of the outer side wall of the spiral stepped shell (202) except for the uppermost layer. The top of the bottom cover (102) is fixedly installed with a sewage receiving box (205) and connected to the bottom set of spiral stepped shells (202). The bottom end of the sewage receiving box (205) is connected to a sewage pipe (207). The transmission position (206) is opened on one side of the bottom wall of the central fixed cylinder (201).

4. A spiral stepped sludge interception device with pre-screening function according to claim 2 or 3, characterized in that: The outer centrifugal cone assembly (3) also includes a bottom fixed mounting seat (301), a centrifugal pulley (302), a bottom insertion mounting seat (310), and a replacement ball cover (312). The bottom fixed mounting seat (301) is arranged and fixed at the bottom end of the inner cavity of the central fixed cylinder (201). The lower outer end of the centrifugal cone (308) is screwed to the bottom fixed mounting seat (301). A drive motor (303) is fixedly installed at the top of the base frame (101). A reducer (304) is fixedly installed in the main body of the output end of the drive motor (303). The rotating shaft of the drive motor (303) is fixedly connected to the input shaft of the reducer (304). A drive spindle (305) is fixedly connected inside the output shaft of the reducer (304). A centrifugal drive pulley (306) is inserted into the top of the shaft (305). The centrifugal pulley (302) is sleeved and fixed to the lower end of the centrifugal cone (308). A centrifugal belt (307) is sleeved and installed between the centrifugal drive pulley (306) and the centrifugal pulley (302). The outer body of the mud discharge pipe (309) is fixed to the inner frame of the base frame (101). The bottom insertion screw seat (310) is fixedly installed at the inlet end of the mud discharge pipe (309). The bottom end of the centrifugal cone (308) is screwed to the bottom insertion screw seat (310). The lower side of the outer end of the mud discharge pipe (309) is connected to the mud discharge port (311). The replacement ball cover (312) is fixedly connected to the bottom end of the corner of the mud discharge pipe (309).

5. A spiral stepped sludge interception device with pre-screening function according to claim 2 or 3, characterized in that: The inner helical rod assembly (4) also includes a bottom helical gear (406), a small gear (409) and a large gear (410). The side wall of the side connecting pipe (403) has sewage outlet holes (404). A shaft base (405) is fixedly installed at the outer bottom end of the sludge discharge pipe (309). The bottom end of the hollow shaft (401) is screwed to the shaft base (405). The bottom helical gear (406) is inserted into the bottom end of the hollow shaft (401). The base frame (10... 1) A gear shifter seat (407) is fixedly installed at the bottom of the frame. A gear shifter shaft (408) is screwed into the gear shifter seat (407). A small gear shifter (409) and a large gear shifter (410) are both inserted into the gear shifter shaft (408). The small gear shifter (409) meshes with the bottom helical gear (406). A coaxial gear (411) is inserted at the bottom of the drive shaft (305). The coaxial gear (411) meshes with the large gear shifter (410).

6. A spiral stepped sludge interception device with pre-screening function according to claim 1, 2 or 3, characterized in that: The inner helical rod assembly (4) also includes an inclined bracket (412), a top plate (413), a shaft top seat (414), and a top insertion screw seat (417). The top plate (413) is fixedly connected to the top of the outer wall of the central cylinder (201) through the inclined bracket (412). The shaft top seat (414) is fixedly connected to the inner end of the top plate (413). A stand (415) is arranged and fixedly connected to the top of the top plate (413). A water inlet elbow (416) is installed and fixed in the stand (415). A top insertion screw seat (417) is installed and fixed at the outlet end of the water inlet elbow (416). The outer side of the hollow shaft (401) is screwed to the shaft top seat (414) and screwed upward into the top insertion screw seat (417).

7. A spiral stepped sludge interception device with pre-screening function according to claim 6, characterized in that: The top filter plate component (5) also includes top filter holes (502), a guide ramp (504) bridging the top filter plate (501) and the slow release tank (505), a central sleeve (503) is fixedly connected to the inner center of the top filter plate (501), and the hollow shaft (401) passes through the central sleeve (503) and is screwed to the shaft top seat (414). The top filter holes (502) are arranged and opened on the bottom surface of the inner cavity of the top filter plate (501).

8. A spiral stepped sludge interception device with pre-screening function according to claim 1, 2, 3 or 7, characterized in that: The slow-release flow assembly (6) also includes a sliding seat (602) and a top connecting plate (605). The sliding seats (602) are fixed in pairs to the top of the outer wall of the slow-release tank (505). Each set of sliding seats (602) has a sliding column (603) slidably connected in it. The sealing plate (604) is fixedly connected to the bottom end of the sliding column (603). The top connecting plate (605) is fixedly connected to the top end of the sliding column (603). Each set of sliding columns (603) has a compression spring (606) sleeved in it. One end of the compression spring (606) is locked to the sliding seat (602), and the other end is locked to the sealing plate (604). The inner fixed seat (608) is fixedly connected inside the uppermost set of spiral stepped shells (202). A spherical groove (609) is opened at the top of the inner fixed seat (608). The inner fixed seat (608) has an inlet slope (610) on both sides.

9. A spiral stepped sludge interception device with pre-screening function according to claim 1, 2, 3 or 7, characterized in that: The sludge discharge pipe (309) is also equipped with a sludge discharge assembly (7) that is connected to the centrifugal cone (308) via transmission. The sludge discharge assembly (7) includes a side seat (701), a sludge discharge auger (702), and a central large gear (706). The side seat (701) is attached to the outer end of the sludge discharge pipe (309). An inner rotating seat (703) is installed and fixed at the inner corner of the sludge discharge pipe (309). The two ends of the rotating shaft of the sludge discharge auger (702) are rotatably connected to the side seat (701) and the inner rotating seat (703) respectively. A sludge discharge assembly (703) is installed and fixed in the outer wall of the main body of the sludge discharge pipe (309). A transmission hub (704) is screwed into which a transmission shaft (705) is screwed. A small transmission gear (707) is inserted at the top of the transmission shaft (705). A large central gear (706) is inserted outside the bottom of the centrifugal cone (308), and the small transmission gear (707) meshes with the large central gear (706). A bevel gear (708) is inserted at the bottom of the transmission shaft (705). A rotating bevel gear (709) is inserted at one end of the shaft of the mud discharge auger (702), and the bevel gear (708) meshes with the rotating bevel gear (709).

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