A sewage treatment equipment

Abstract

The sewage treatment equipment of the present invention belongs to the field of environmental protection technology. In view of the problem that the existing screw stacking machine has a poor filter pressing effect, the parallel first inner spiral rod group and the second inner spiral rod group are arranged to be connected by a plurality of spiral rods through a clutch engagement, so that the spiral rods at different positions can be selected to be engaged or separated. When it is necessary to fully concentrate the sewage, the fixed ring sheet located at the spiral rod engagement in the filter cavity is arranged as a closed fixed ring sheet group, and the closed fixed ring sheet group can divide the filter cavity into a plurality of closed cavities, and can also trigger the engagement or separation of the spiral rods. In the formed closed cavity, the two parallel concentrating spiral rods rotate in opposite directions, so that a circulating sewage channel can be formed in the closed cavity, so that the sewage can be better concentrated, and the concentration and dehydration can be carried out independently, thereby improving the sewage treatment efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, and in particular to sewage treatment equipment. Background Art

[0002] In sewage treatment, the screw stacker is usually used for solid-liquid separation in municipal sewage treatment plants, food processing plants, and landfill leachate due to its advantages of low power consumption, simple and reliable structure, and stable operation. However, the compression effect is not good for sewage or sludge with high water content. Usually, after being filtered by the screw stacker, its water content is still as high as 70%. In view of this situation, the prior art has only made a series of improvements, such as Patent Document 1 (CN106396331A), which relates to an integrated sludge concentration, dehydration and drying treatment device and a treatment method thereof. On the basis of the concentration zone and dehydration zone included in the existing screw stacker, a sludge deep dehydration device is provided at the lower end of the dehydration zone. The sludge deep dehydration device includes two sections, one of which is a variable pitch section. The extrusion machine is composed of two screw shafts, and the other section is an extrusion dehydration chamber composed of a filter plate, a filter screen and a filter cloth. This arrangement can achieve a very high dehydration rate of sludge, so that the moisture content of the treated sludge is less than 50%. Although it achieves a good sludge dehydration effect, the additional sludge deep dehydration device makes the device complicated and occupies a larger space. On the other hand, since the screws used are all integrally formed, the sludge filtration cannot be adjusted according to actual needs. For example, Patent Document 2 (CN11 2129045A) discloses a self-adjusting screw stacking machine, which includes a concentrating shaft and a dewatering shaft which are separately arranged for rotation, wherein the concentrating shaft is driven to rotate by a pneumatic device, and the rotation speed of the concentrating shaft can be adjusted according to the water content of the sludge. When the water content is high, the driving force of the concentrating shaft is reduced, the rotation speed of the concentrating shaft is slowed down, and the dewatering time of the sludge in the concentrating section is increased. When the water content is low, the driving force of the concentrating shaft is increased, the rotation speed of the concentrating shaft is increased, and the dewatering time of the sludge in the concentrating section is reduced. Finally, Dehydration is achieved by driving the dehydration shaft to rotate by a motor. Although the split spiral shaft structure is used to dynamically adjust the sludge thickening action, it is achieved by changing the sludge thickening time, which will undoubtedly prolong the working time of the screw stacker. Moreover, the power used is a pneumatic device, which transmits power by driving the fan blades inside the thickening shaft to rotate. Therefore, when the sludge gets stuck, the thickening shaft will fail, and the screw stacker will easily fail to operate. The failure rate will be relatively high, and the power output will become very unstable.

[0003] In summary, in the prior art, for sewage treatment equipment, especially the snail stacker, in order to improve its sludge filtering efficiency, either a filtering device is added to the existing snail stacker, or the screw of the snail stacker is set to a split structure, and the sludge filtering efficiency is improved by changing the sludge concentration time of the snail stacker. None of them takes into account that the sludge can be concentrated by multiple cycles in the snail stacker, and the sludge dehydration action can be improved in space. To this end, the present application provides a sewage treatment equipment that can allow the sludge to be concentrated by multiple cycles in the snail stacker according to the needs of dehydration, and the spiral shaft of the snail stacker is set to be able to perform segmented action according to actual needs, including two spiral shafts and the distance between the spiral shafts can be automatically adjusted according to the action process of the sludge, and can make the sludge filtration effect better. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a sewage treatment equipment, which includes: a sewage feeding bin, a filter chamber and a sludge discharging assembly, the filter chamber is formed by a plurality of fixed ring sheets and movable ring sheets stacked in sequence, a first inner spiral rod group and a second inner spiral rod group are arranged in the filter chamber, the first inner spiral rod group and the second inner spiral rod group each include a dewatering spiral rod and a plurality of concentrating spiral rods, the dewatering spiral rod is rotatably arranged on the sludge discharging assembly, one end of the dewatering spiral rod is provided with a power coupling head 2, and the other end is provided with a clutch coupling group 3, the two ends of the concentrating spiral rod are respectively provided with a clutch coupling group 1 and a clutch coupling group 2, the plurality of concentrating spiral rods are detachably connected at a first connection point formed by the clutch coupling group 1 and the clutch coupling group 2, close to the dewatering spiral rod The concentrating spiral rod of the rod is detachably connected at the second connection point formed by the clutch joint group 1 and the clutch joint group 3. The concentrating spiral rod away from the dehydration spiral rod is connected to the power input head 1 through the clutch joint group 2. The power input head 1 is rotatably set at the sewage feed bin. The fixed ring plate located at the first connection point is the second closed fixed ring plate group, and the fixed ring plate located at the second connection point is the first closed fixed ring plate group. The first closed fixed ring plate group and the second closed fixed ring plate group have the same structure and both include a movable upper closed plate group and a lower closed plate group. When the upper closed plate group and the lower closed plate group abut against each other, the filter cavity on both sides of the first closed fixed ring plate group and / or the second closed fixed ring plate group can be cut off, so that the first connection point and / or the second connection point are disconnected.

[0005] Furthermore, the filter cavity is bounded by the second connection point, the filter cavity where the dehydration spiral rod is located is the dehydration area, and the filter cavity where several concentrating spiral rods are located is the concentrating area. When the sewage feed bin enters the concentrating area and needs to be repeatedly concentrated, the upper closed plate group and the lower closed plate group of the first closed fixed ring plate group or the second closed fixed ring plate group are made to abut against each other, the first connection point or the second connection point is disconnected, and a relatively closed space is formed from the sewage feed bin to the filter cavity between the first closed fixed ring plate group or the second closed fixed ring plate group, and then the concentrating spiral rod of the first inner spiral rod group and the concentrating spiral rod of the second inner spiral rod group are driven to rotate in opposite directions, and the sewage forms a circulating flow in the relatively closed space, and a circulating flow path is formed in the closed space. After the sewage is concentrated to a certain extent, the upper closed plate group and the lower closed plate group are opened, and the concentrated sewage enters the next concentrating area or the dehydration area again, and the rotation drive direction of the power input head of the first inner spiral rod group and the second inner spiral rod group changes from opposite to the same.

[0006] Further, the concentrating spiral rod comprises a screw body 1 and a spiral blade 1 arranged on the screw body 1, the clutch joint group 1 and the clutch joint group 2 are respectively arranged at the two ends of the screw body 1, the clutch joint group 1 comprises a hexagonal joint groove 1 and a telescopic driving gear located thereon, the clutch joint group 2 comprises a hexagonal joint groove 2, a telescopic locking pin is slidably arranged in the hexagonal joint groove 1, a telescopic rack is arranged on the upper end of the telescopic locking pin, the telescopic rack is meshed with the telescopic driving gear, and the teeth of the telescopic driving gear are exposed on the side of the end plate of the screw body 1, the dehydration spiral rod comprises a screw body 2 and a spiral blade 2 arranged on the outer side of the screw body 2, the clutch joint group 3 and the power joint head 2 are respectively arranged at the two ends of the screw body 2, the clutch joint group 3 comprises a hexagonal joint groove 4, and the telescopic locking pin is driven to enter and exit the hexagonal joint groove 2 or the hexagonal joint groove 4 by the rotation of the telescopic driving gear.

[0007] Furthermore, the first closed fixed ring sheet group and the second closed fixed ring sheet group both include a ring sheet main body three and a plurality of fixed brackets two arranged on the outer circumference thereof, an inner filter hole four is opened inside the ring sheet main body three, a fixed hole three is arranged on the fixed bracket two, a vertical through groove is opened in the ring sheet main body three in a direction perpendicular to the inner filter hole four, the upper closed plate group and the lower closed plate group are respectively inserted into the ring sheet main body three from the upper and lower ends of the vertical through groove, the upper closed plate group and the lower closed plate group have the same structure, both include an outer closed plate and an inner sliding start plate slidably arranged in the outer closed plate, a semicircular groove one and a semicircular groove two are also opened at the inner end of the outer closed plate, a driving rack is arranged on the side of the inner sliding start plate close to the telescopic driving gear, the telescopic driving gear rotates by the inner sliding start plate moving inwardly, thereby driving the telescopic locking pin to retract, so that the telescopic locking pin is completely retracted into the hexagonal joint groove one when the upper closed plate group and the lower closed plate group are closed.

[0008] Further, the fixed ring piece includes a ring piece body and a plurality of fixed brackets arranged on the outer periphery of the ring piece body, a fixed hole is arranged on the fixed bracket, and an inner filter hole is opened on the inner side of the ring piece body, and the contour curve of the inner filter hole is composed of a semicircular arc 1, a straight segment 1, a semicircular arc 2, a semicircular arc 3, a straight segment 2, a semicircular arc 4, a straight segment 3, and a straight segment 4, and the left ends of the straight segment 1 and the straight segment 4 are respectively connected to the upper and lower ends of the semicircular arc 1 , the right end of the straight segment one is connected to the upper end of the semicircular arc two, the right end of the straight segment four is connected to the lower end of the semicircular arc two, the right end of the semicircular arc two intersects with the left end of the semicircular arc three, the upper end of the semicircular arc three is connected to the left end of the straight segment two, the lower end of the semicircular arc three is connected to the left end of the straight segment three, the right end of the straight segment two is connected to the upper end of the semicircular arc four, and the right end of the straight segment three is connected to the lower end of the semicircular arc four.

[0009] Further, the center of the semicircle arc one is O1, the center of the semicircle arc two is O2, the center of the semicircle arc three is O3, the center of the semicircle arc four is O4, the distance between O1 and O2 is L1, the distance between O3 and O4 is L2, the distance between O2 and O3 is L3, L1=L2, L3 is equal to the sum of the radius of the screw body one of the first inner screw rod group and the radius of the screw body one of the second inner screw rod group, L3 is also equal to the sum of the radius of the screw body two of the first inner screw rod group and the radius of the screw body two of the second inner screw rod group, and L1 is equal to the height of the spiral blade two or the height of the spiral blade one.

[0010] Furthermore, the movable ring piece includes a ring piece body 2 and a sliding bracket 1 arranged on its outer periphery, an inner filter hole 2 is arranged in the ring piece body 2, and a sliding hole 1 is arranged on the sliding bracket 1, and the shape of the inner filter hole 2 is the same as that of the inner filter hole 1.

[0011] Furthermore, the sludge discharge assembly includes a cavity mounting seat, a mud pressing assembly and a motor mounting seat group, the cavity mounting seat includes a right support seat, and an inner filter hole three, a fixed hole two and a sliding hole two are arranged on the right support seat, the shape of the inner filter hole three is the same as the shape of the inner filter hole one, and a fixed shaft one and a sliding shaft two are arranged between the sewage feed bin and the cavity mounting seat, the fixed hole one of the fixed ring plate passes through the fixed shaft one, and the sliding hole one of the movable ring plate passes through the sliding shaft two, one end of the fixed shaft one is arranged on one side of the sewage feed bin, and the other end passes through the fixed hole two and is fixedly arranged on the right support seat, and one end of the sliding shaft two is arranged on one side of the sewage feed bin, and the other end passes through the sliding hole two and is fixedly arranged on the right support seat.

[0012] Furthermore, a telescopic sleeve group 1 is also sleeved between the two power input heads 1, and the telescopic sleeve group 1 includes a ring 1, a ring 2 and a telescopic cylinder 1 arranged between the ring 1 and the ring 2, a blocking edge ring 1 is arranged on one side of the ring 1, and a blocking edge ring 2 is arranged on one side of the ring 2, the ring 2 is slidably arranged in a rotating sliding hole 2 opened on the side wall of the sewage feed bin, the ring 1 is slidably arranged in a rotating sliding hole 1 opened on the side wall of the sewage feed bin, and the length of the blocking edge ring 1 is greater than or equal to L1.

[0013] Furthermore, the first closed fixed ring plate group and the second closed fixed ring plate group both include a ring plate body three and a plurality of fixed brackets two arranged on the outer circumference thereof, an inner filter hole four is opened inside the ring plate body three, a fixed hole three is arranged on the fixed bracket two, a vertical through groove is opened in the ring plate body three in a direction perpendicular to the inner filter hole four, the upper closed plate group and the lower closed plate group are respectively inserted into the ring plate body three from the upper and lower ends of the vertical through groove, the upper closed plate group and the lower closed plate group have the same structure, both include an outer closed plate and an inner sliding start plate slidably arranged in the outer closed plate, a first elliptical groove and a second elliptical groove are also opened at the inner end of the outer closed plate, a driving rack is arranged on the side of the inner sliding start plate close to the telescopic driving gear, the telescopic driving gear rotates by the inner sliding start plate moving inwardly, thereby driving the telescopic locking pin to retract, so that the telescopic locking pin is completely retracted into the hexagonal joint groove one when the upper closed plate group and the lower closed plate group are closed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The sewage treatment equipment of the present invention aims at the problem that the existing screw stacking machine has poor filter pressing effect. The first inner spiral rod group and the second inner spiral rod group are innovatively arranged to be connected by a plurality of spiral rods through clutch engagement, so that the spiral rods at different positions can be selected for engagement or separation. Considering that when the sludge with a high water content is filter pressed, it is necessary to fully concentrate it. The fixed ring sheet located at the joint of the spiral rods in the filter cavity is arranged as a closed fixed ring sheet group. In addition to being able to divide the filter cavity into a plurality of closed cavities, the closed fixed ring sheet group can also trigger the engagement or separation of the spiral rods. In addition, in the formed closed cavity, the two parallel concentrating spiral rods rotate in opposite directions, so that a circulating sewage channel can be formed in the closed cavity, so that the sewage can be better concentrated.

[0016] 2. The contour shape of the inner filter hole inside the fixed ring plate and the movable ring plate used in the filter cavity of the present invention is an inverted 8 shape adapted to the first inner spiral rod group and the second inner spiral rod group being away from each other and approaching each other, so that the movable plate can only slide on the left and right sides along the sliding hole 1, avoiding the movable plate from sliding up and down due to the influence of gravity, avoiding collision with the first inner spiral rod group and the second inner spiral rod group, and extending the service life;

[0017] 3. The clutch engagement mode between each spiral rod of the sewage treatment equipment of the present invention uses a telescopic lock pin structure, and a telescopic rack is arranged on the top of the telescopic lock pin, and a telescopic driving rack is arranged on the upper side of one end of the screw main body one, and the side edge of the telescopic driving gear is exposed at the end face of the spiral main body one, and the lower end of the telescopic driving gear can mesh with the telescopic driving rack, and a gap is arranged between two adjacent spiral rods, and the closed fixed ring plate group is correspondingly provided with an inner sliding start plate that can mesh with the telescopic driving gear, and a rack is arranged on one side of the inner sliding start plate, and the inner sliding start plate is slidably arranged in the inner slide groove of the outer closing plate, and a buffer driving device such as a spring or a telescopic cylinder is arranged in the inner slide groove, when the upper closing plate group and the lower closing plate group are close to each other, the inner sliding start plate extends into the gap, drives the telescopic gear to rotate, and makes the telescopic lock pin retract, thereby realizing the separation of each spiral rod, and the outer closing plate blocks the inner filter hole four, and in addition, the spiral rod main body one and / or the spiral rod main body two are undertaken by the semicircular groove of the lower closing plate group, thereby ensuring the rotation of the spiral rod;

[0018] 4. The present invention aims at how to make the adjacent concentrating spiral rods in the concentration area rotate in opposite directions without colliding with each other when the spiral blades of the first inner spiral rod group and the second inner spiral rod group are in the state of sewage treatment with intersecting spiral blades, so that the present invention also includes telescopic set 1, telescopic set 2 and the first telescopic set, and the outer closing plate is provided with the first elliptical groove and the second elliptical groove instead of the semicircular groove. In this way, when the spiral blades intersect with each other, only the distance between the two concentrating spiral rods in the concentration area needs to be changed, and the distance between the dehydration spiral rods does not need to be changed. In this way, dehydration and concentration can be carried out separately, which further improves the sludge treatment effect.

[0019] 5. Finally, in order to adapt to the change of the pitch between the screws arranged side by side while ensuring that the sewage does not leak out, a rotating bearing is also included. The power head is inserted into the rotating bearing, and then the rotating bearing also includes a limiting ring with a certain coverage surface. The limiting ring can adapt to the long slot hole opened to seal the hole without leaking sewage. Furthermore, the first inner screw rod group and the second inner screw rod group are both screw rod assembly structures that can be easily disassembled, so that the screw rod assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1-2 This is a schematic diagram of the structure of the sewage treatment equipment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the sewage treatment equipment after the fixed ring and the movable ring are removed;

[0022] Figure 4 for Figure 3 A magnified view of point A;

[0023] Figure 5 for Figure 3 A magnified view of point B;

[0024] Figure 6 It is a structural schematic diagram of the sewage treatment equipment from another view direction after the fixed ring piece and the movable ring piece are removed;

[0025] Figure 7 It is a top view of the sewage treatment equipment after removing the fixed ring and the movable ring;

[0026] Figure 8-9 For the convenience of illustrating the structural schematic diagram of the first inner spiral rod group and the second inner spiral rod group;

[0027] Figure 10-11 A schematic diagram of the structure of the joint of the first inner spiral rod group and the second inner spiral rod group for convenience of illustration;

[0028] Fig.12It is a schematic diagram of the structure of the mud pressing component;

[0029] Fig.13 It is a schematic diagram of the structure of the sewage feed bin without drawing the bin cover;

[0030] Fig.14 It is a structural schematic diagram of a telescopic set;

[0031] Fig.15 Schematic diagram of the right support structure;

[0032] Fig.16 An exploded view of the first closed fixed ring sheet group or the second closed fixed ring sheet group;

[0033] Fig.17 This is a schematic diagram of the motor mounting seat assembly structure;

[0034] Fig.18 It is a schematic diagram of the concentrated helical rod structure;

[0035] Fig.19 It is a schematic diagram of the dehydration spiral rod structure;

[0036] Fig. 20 It is a schematic diagram of the structure of the fixed ring piece and the movable ring piece;

[0037] Figure 21-22 It is a schematic structural diagram of the sewage treatment equipment of the second embodiment.

[0038] Among them, 1. sewage feed bin; 2. filter chamber; 3. sludge discharge assembly; 4. fixed ring piece; 5. movable ring piece; 6. motor mounting seat group; 7. chamber mounting seat; 8. mud pressing assembly; 9. first inner spiral rod group; 10. second inner spiral rod group; 11. dehydration spiral rod; 12. concentration spiral rod one; 13. concentration spiral rod two; 14. first closed fixed ring piece group; 15. second closed fixed ring piece group; 16. ring piece body one; 17. fixed bracket one; 18. fixed hole one; 19. inner filter hole one; 20. ring piece body two; 21. sliding bracket one; 22. sliding hole one; 23. inner filter hole two; 24. semicircular arc one; 25. straight section one; 26. semicircular arc two; 27. semicircular arc three; 28. straight section Segment 2; 29, semicircular arc 4; 30, straight segment 3; 32, fixed axis 1; 33, sliding axis 2; 34, screw body 1; 35, spiral blade 1; 36, clutch joint group 1; 37, clutch joint group 2; 38, power joint head 1; 39, screw body 2; 40, spiral blade 2; 41, clutch joint group 3; 42, power joint head 2; 43, power input head 1; 44, telescopic set 1; 45, telescopic set 2; 46, first telescopic set; 47, telescopic lock pin; 48, telescopic drive gear; 49, telescopic rack; 50, hexagonal joint slot 1; 51, hexagonal joint slot 2; 52, hexagonal joint slot 3; 53, hexagonal joint slot 4; 54, power external tooth; 55, accommodating slot; 56, fixed hole 2; 5 7. Ring 1; 58. Ring 2; 59. Blocking edge ring 1; 60. Blocking edge ring 2; 61. Telescopic cylinder 1; 62. Cylinder barrel 1; 63. Piston rod 1; 64. Ring 3; 65. Ring 4; 66. Telescopic cylinder 2; 67. Piston rod 2; 68. Cylinder barrel 2; 69. Right support seat; 70. Inner filter hole 3; 71. Sliding hole 2; 72. Motor seat 1; 73. Motor seat 2; 74. Telescopic drive member; 75. Through hole 1; 76. Through hole 2; 77. Rotating bearing 1; 78. Rotating bearing 2; 79. Hexagonal hole 1; 80. Limiting ring piece 1; 81. Bin body; 82. Bin cover; 83. Liquid outlet; 84. Rotating sliding hole 1; 85. Rotating sliding hole 2; 86. Semicircular arc 5; 87. Semicircular arc 6; 88 , straight section five; 89, straight section six; 90, mud pressing body one; 91, rotating bearing three; 92, rotating bearing four; 93, rotating sliding hole three; 94, rotating sliding hole four; 95, semicircular arc seven; 96, straight section seven; 97, semicircular arc eight; 98, straight section eight; 99, hexagonal hole two; 100, limiting ring piece two; 101, ring piece body three; 102, fixed bracket two; 103, fixed hole three; 104, inner filter hole four; 105, upper closing plate group; 106, lower closing plate group; 107, outer closing plate; 108, semicircular groove one; 109, semicircular groove two; 110, inner sliding start plate; 111, inner slide groove; 112, opening tip; 113, concentration area one; 114, concentration area two; 115, dehydration area;116, power input head 2; 117, vertical through slot; 118, first elliptical slot; 119, second elliptical slot. ; DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example 1

[0040] like Figure 1-20As shown, a sewage treatment equipment comprises: a sewage feeding bin 1, a filter chamber 2 and a sludge discharge assembly 3, the filter chamber 2 is formed by a plurality of fixed ring pieces 4 and movable ring pieces 5 being stacked in sequence, a first inner spiral rod group 9 and a second inner spiral rod group 10 are arranged in the filter chamber 2, the first inner spiral rod group 9 and the second inner spiral rod group 10 each comprise a dewatering spiral rod 11 and a plurality of concentrating spiral rods, one end of the dewatering spiral rod 11 is rotatably arranged on the sludge discharge assembly 3, one end is provided with a power joint head 2 42, and the other end is provided with a clutch joint group 3 41, the two ends of the concentrating spiral rod are respectively provided with a clutch joint group 1 36 and a clutch joint group 2 37, the plurality of concentrating spiral rods are detachably connected at a first connection point formed by the clutch joint group 1 36 and the clutch joint group 2 37, the concentrating spiral rods close to the dewatering spiral rod 11 are connected at the clutch joint group 1 3 6 and the second connection point formed by the clutch joint group 3 41 is detachably connected, the concentrating screw rod away from the dehydration screw rod 11 is connected to the power input head 43 through the clutch joint group 2 37, and the power input head 43 is rotatably set at the sewage feed bin 1, the fixed ring plate 4 located at the first connection point is the second closed fixed ring plate group 15, and the fixed ring plate 4 located at the second connection point is the first closed fixed ring plate group 14, the first closed fixed ring plate group 14 and the second closed fixed ring plate group 15 have the same structure, and both include a movable upper closed plate group 105 and a lower closed plate group 106. When the upper closed plate group 105 and the lower closed plate group 106 abut against each other, the filter cavity 2 on both sides of the first closed fixed ring plate group 14 and / or the second closed fixed ring plate group 15 can be cut off, and the first connection point and / or the second connection point can be disconnected at the same time.The filter chamber 2 is bounded by the second connection point, the filter chamber 2 where the dehydration screw rod 11 is located is the dehydration zone 115, and the filter chamber 2 where the plurality of concentrating screw rods are located is the concentrating zone. When the sludge concentration in the sewage feed bin 1 entering the concentrating zone is low and the sludge water content is high, the upper closed plate group 105 and the lower closed plate group 106 of the first closed fixed ring sheet group 14 or the second closed fixed ring sheet group 15 are abutted against each other, the first connection point or the second connection point is disconnected, and a relatively closed space is formed in the filter chamber 2 from the sewage feed bin 1 to the first closed fixed ring sheet group 14 or the second closed fixed ring sheet group 15, and then the concentrating screw rods of the first inner spiral rod group 9 and the second inner spiral rod group 10 are driven. The concentrating spiral rods rotate in opposite directions, and the sewage entering from the sewage feed bin 1 forms a circulating flow in the relatively closed space. By forming a circulating flow path in the closed space, it is possible to concentrate sewage with a higher water content without adding additional filtering devices. After concentration to a certain extent, the upper closed plate group 105 and the lower closed plate group 106 are opened to each other, and the concentrated sewage enters the next concentration area, or enters the dehydration area 115. The corresponding rotational drive directions of the power input heads 43 of the first inner spiral rod group 9 and the second inner spiral rod group 10 change from opposite to the same, thereby driving the sewage treatment equipment to perform the next dehydration operation on the sewage.

[0041] like Fig.18 As shown, the concentrating spiral rod comprises a screw body 1 34 and a spiral blade 1 35 arranged on the screw body 1 34, the clutch joint group 1 36 and the clutch joint group 2 37 are respectively arranged at the two ends of the screw body 1 34, the clutch joint group 1 36 comprises a hexagonal joint groove 1 50 and a telescopic driving gear 48 located thereon, the clutch joint group 2 37 comprises a hexagonal joint groove 2 51, a telescopic locking pin 47 is slidably arranged in the hexagonal joint groove 1 50, and a telescopic rack 49 is arranged on the upper end of the telescopic locking pin 47, and the telescopic rack 49 is connected to the The telescopic driving gear 48 is meshed, and the teeth of the telescopic driving gear 48 are exposed on the side of the end plate of the screw body 1 34. The dehydration screw 11 includes a screw body 2 39 and a spiral blade 2 40 arranged on the outside of the screw body 2 39. The clutch engagement group 3 41 and the power engagement head 2 42 are respectively arranged at both ends of the screw body 2 39. The clutch engagement group 3 41 includes a hexagonal engagement groove 4 53. The rotation of the telescopic driving gear 48 drives the telescopic locking pin 47 to enter and exit the hexagonal engagement groove 2 51 or the hexagonal engagement groove 4 53.

[0042] like Fig.16As shown, the first closed fixed ring sheet group 14 and the second closed fixed ring sheet group 15 both include a ring sheet body 3 101 and a plurality of fixed brackets 2 102 arranged on the periphery thereof, an inner filter hole 4 104 is provided inside the ring sheet body 3 101, a fixed hole 3 103 is provided on the fixed bracket 2 102, a vertical through groove 117 is provided in the ring sheet body 3 101 in a direction perpendicular to the inner filter hole 4 104, the upper closed plate group 105 and the lower closed plate group 106 are respectively inserted into the ring sheet body 3 101 from the upper and lower ends of the vertical through groove 117, and the upper closed plate group 105 and the lower closed plate group 106 are respectively inserted into the ring sheet body 3 101 from the upper and lower ends of the vertical through groove 117, and the upper closed plate group 105 and the lower closed plate group 106 are respectively inserted into the ring sheet body 3 101 from the upper and lower ends of the vertical through groove 117. The closed plate group 106 has the same structure, and both include an outer closed plate 107 and an inner sliding start plate 110 slidably arranged in the outer closed plate 107. A semicircular groove 108 and a semicircular groove 2 109 are also provided at the inner end of the outer closed plate 107. A driving rack (not shown) is provided on the side of the inner sliding start plate 110 close to the telescopic drive gear 48. The telescopic drive gear 48 is rotated by the inward movement of the inner sliding start plate 110, thereby driving the telescopic lock pin 47 to retract, so that the telescopic lock pin 47 is completely retracted into the hexagonal joint groove 1 50 when the upper closed plate group 105 and the lower closed plate group 106 are closed.

[0043] Furthermore, an inner slide groove 111 is provided in the outer closing plate 107, and the inner sliding start plate 110 is slidably set in the inner slide groove 111. A driving elastic member is also provided in the inner slide groove 111, so that the inner sliding start plate 110 moves before the outer closing plate 107. At the same time, a power drive component is also provided to drive the upper closing plate group 105 and the lower closing plate group 106 to slide up and down, such as a telescopic cylinder or a telescopic motor, etc., which is common knowledge in the field and will not be repeated here.

[0044] like Fig. 20As shown, (a) and (b) schematically illustrate the structure of the fixed ring piece 4, the fixed ring piece 4 includes a ring piece body 16 and a plurality of fixed brackets 17 arranged on the outer periphery of the ring piece body 16, a fixed hole 18 is arranged on the fixed bracket 17, and an inner filter hole 19 is opened on the inner side of the ring piece body 16, and the contour curve of the inner filter hole 19 is composed of a semicircular arc 1 24, a straight segment 1 25, a semicircular arc 2 26, a semicircular arc 3 27, a straight segment 2 28, a semicircular arc 4 29, a straight segment 3 30, and a straight segment 4, and the left ends of the straight segment 1 25 and the straight segment 4 are respectively The straight segment 1 25 is respectively connected to the upper and lower ends of the semicircular arc 1 24, the right end of the straight segment 1 25 is connected to the upper end of the semicircular arc 2 26, the right end of the straight segment 4 is connected to the lower end of the semicircular arc 2 26, the right end of the semicircular arc 2 26 intersects with the left end of the semicircular arc 3 27, the upper end of the semicircular arc 3 27 is connected to the left end of the straight segment 2 28, the lower end of the semicircular arc 3 27 is connected to the left end of the straight segment 3 30, the right end of the straight segment 2 28 is connected to the upper end of the semicircular arc 4 29, and the right end of the straight segment 3 30 is connected to the lower end of the semicircular arc 4 29.

[0045] The center of the semicircular arc 1 24 is O1, the center of the semicircular arc 26 is O2, the center of the semicircular arc 3 27 is O3, and the center of the semicircular arc 4 29 is O4. The distance between O1 and O2 is L1, the distance between O3 and O4 is L2, and the distance between O2 and O3 is L3. L1=L2. The size of L3 is equal to the sum of the radius of the screw body 1 34 of the first inner screw rod group 9 and the radius of the screw body 1 34 of the second inner screw rod group 10, and is also equal to the sum of the radius of the screw body 2 39 of the first inner screw rod group 9 and the radius of the screw body 2 39 of the second inner screw rod group 10. L1 is equal to the height of the spiral blade 2 40 or the height of the spiral blade 1 35.

[0046] like Fig. 20 As shown, (c) and (d) schematically illustrate the structure of the movable ring piece 5, the movable ring piece 5 includes a ring piece body 20 and a sliding bracket 21 arranged on its outer periphery, an inner filter hole 23 is arranged in the ring piece body 20, a sliding hole 22 is arranged on the sliding bracket 21, and the shape of the inner filter hole 23 is the same as the shape of the inner filter hole 19.

[0047] Furthermore, the shape of the inner filter hole four 104 is the same as the shape of the inner filter hole one 19.

[0048] The sludge discharging assembly 3 includes a cavity mounting seat 7, a sludge pressing assembly 8 and a motor mounting seat assembly 6. Fig.15As shown, the cavity mounting seat 7 includes a right support seat 69, on which an inner filter hole three 70, a fixed hole two 56 and a sliding hole two 71 are arranged. The shape of the inner filter hole three 70 is the same as that of the inner filter hole one 19. A fixed shaft one 32 and a sliding shaft two 33 are arranged between the sewage feed bin 1 and the cavity mounting seat 7. The fixed hole one 18 of the fixed ring piece 4 passes through the fixed shaft one 32, and the sliding hole one 22 of the movable ring piece 5 passes through the sliding shaft two 33. One end of the fixed shaft one 32 is arranged on one side of the sewage feed bin 1, and the other end passes through the fixed hole two 56 and is fixedly arranged on the right support seat 69. One end of the sliding shaft two 33 is arranged on one side of the sewage feed bin 1, and the other end passes through the sliding hole two 71 and is fixedly arranged on the right support seat 69.

[0049] like Fig.17 As shown, the motor mounting seat group 6 includes a motor seat 1 72 and a motor seat 2 73, and the motor seat 1 72 and the motor seat 2 73 can slide laterally relative to the cavity mounting seat 7 through a telescopic driving member 74. A through hole 1 75 is provided on the motor seat 1 72, and a through hole 2 76 is provided on the motor seat 2 73. A rotating bearing 1 77 is provided in the through hole 1 75, and a rotating bearing 2 78 is provided in the through hole 2 76. A power input head 2 116 is provided in the power coupling head 2 42, and the power input head 2 116 passes through the rotating bearing 1 77 and the rotating bearing 2 78.

[0050] The rotating bearing 1 77 and the rotating bearing 2 78 have the same structure, and both include an internal hexagonal hole 1 79 and limiting rings 1 80 arranged on both sides.

[0051] The power input head 1 43 and the power input head 2 116 are both hexagonal rods, and the ends of the power input head 1 43 and the power input head 2 116 are used for transmission connection with the output shaft of the motor (not shown in the figure), and the motor provides rotational power to the power input head 1 43 and the power input head 2 116.

[0052] like Fig.12 As shown, the mud pressing assembly 8 is arranged between the motor mounting seat group 6 and the cavity mounting seat 7, and the mud pressing assembly 8 includes the mud pressing body 90, the rotating bearing 3 91 and the rotating bearing 4 92. A rotating sliding hole 3 93 and a rotating sliding hole 4 94 are opened in the mud pressing body 90. The outer contours of the rotating sliding hole 3 93 and the rotating sliding hole 4 94 are composed of a semicircular arc 7 95, a straight segment 7 96, a semicircular arc 8 97 and a straight segment 8 98. The center of the semicircular arc 7 95 is O7, the center of the semicircular arc 8 97 is O8, the distance between O7 and O8 is L4, and L1=L4.

[0053] The outer contour of the mud pressing body 1 90 is the same as the contour curve of the inner filter hole 3 70. The rotating bearing 3 91 and the rotating bearing 4 92 have the same structure, both of which have hexagonal holes 2 99 opened inside, and limiting ring pieces 2 100 are arranged on both sides. The length of the limiting ring piece 2 100 is greater than or equal to L4, so that the rotating sliding hole 3 93 and the rotating sliding hole 4 94 can be blocked when the bearing slides. The power input head 2 116 passes through the hexagonal hole 2 99. A clamping member, such as a clamping spring or a clamping telescopic cylinder, is arranged between the mud pressing assembly 8 and the motor mounting seat assembly 6 to adjust the clamping force of the mud pressing assembly 8 (not shown in the figure, which is common knowledge in the art).

[0054] like Fig.13 As shown, the sewage feed bin 1 includes a bin body 81 and a bin cover 82, the bin cover 82 is covered on the upper end of the bin body 81, a liquid outlet 83 is opened on one side of the bin body 81 close to the filter cavity 2, and a rotating slide hole 1 84 and a rotating slide hole 2 85 are opened on the other side of the bin body 81 away from the filter cavity 2, the rotating slide hole 1 84 and the rotating slide hole 2 85 have the same contour curve, both include a semicircular arc 5 86, a straight segment 5 88, a semicircular arc 6 87 and a straight segment 6 89, the center of the semicircular arc 5 is O5, the center of the semicircular arc 6 87 is O6, the distance between O5 and O6 is L5, and L1=L5.

[0055] like Figure 10-11 As shown, a telescopic set 44 is also provided between the two power input heads 43. Fig.14 The telescopic sleeve assembly 44 includes a ring 1 57, a ring 2 58 and a telescopic cylinder 1 61 arranged between the ring 1 57 and the ring 2 58. The distance between the ring 1 57 and the ring 2 58 is adjusted by the telescopic cylinder 1 61. A blocking edge ring 1 59 is arranged on one side of the ring 1 57, and a blocking edge ring 2 60 is arranged on one side of the ring 2 58. The ring 2 58 is slidably arranged in the rotating slide hole 2 85, and the ring 1 57 is slidably arranged in the rotating slide hole 1 84. The length of the blocking edge ring 1 59 is greater than or equal to L5.

[0056] Furthermore, in order to facilitate the adjustment of the distance between the first inner screw rod group 9 and the second inner screw rod group 10, a plurality of telescopic sets 45 are provided at the first connection point, and a plurality of first telescopic sets 46 are provided at the second connection point. The first telescopic sets 46 and the telescopic sets 45 have the same structure, both including a ring 3 64, a ring 45 and a telescopic cylinder 2 66. The telescopic cylinder 2 66 is provided between the ring 3 64 and the ring 4 65 for adjusting the distance between the ring 3 64 and the ring 4 65. The telescopic cylinder 2 66 includes a piston rod 2 67 and a cylinder barrel 2 68. The piston rod 2 67 is inserted into the cylinder barrel 2 68.

[0057] Furthermore, in order to ensure that there is still a rotational driving force between the concentrating spiral rods after the first connection point and the second connection point are disconnected, a power coupling head 38 is provided on the side of the screw body 34 close to the clutch coupling group 2 37, and a power input source is provided on the upper closed plate group 105 and / or the lower closed plate group 106. When the upper closed plate group 105 and the lower closed plate group 106 are abutted, the power input source engages with the power coupling head 38, thereby driving the concentrating spiral rod to rotate.

[0058] Furthermore, if Fig.18 As shown, the power joint head 1 38 is a power outer tooth 54, and the power input source is a driving motor with an output gear, and the driving motor is arranged on the upper closed plate group 105 and / or the lower closed plate group 106. When the upper closed plate group 105 and the lower closed plate group 106 are in contact, the output gear meshes with the power outer tooth 54 to realize the rotation of the concentration spiral rod. In addition, the sleeve ring 3 64 and / or the sleeve ring 4 65 of the first telescopic set 46 and the second telescopic set 45 can also be set as an inner ring and outer ring structure with internal driving power. Specifically, a driving motor can be set on the outer ring, and ring teeth can be set on the inner ring. The output gear of the driving motor rotates to drive the ring teeth to rotate to realize the rotation drive and rotation direction selection of the concentration spiral rod.

[0059] Furthermore, the number of the concentrating spiral rods is at least one, preferably two. Fig.11 As shown, the concentrating spiral rod includes a concentrating spiral rod 12 and a concentrating spiral rod 2 13 . Example 2

[0060] like Figure 21-22 As shown, the difference between the second embodiment and the embodiment is that the structure of the outer closing plate 107 is different. Specifically, a first elliptical groove 118 and a second elliptical groove 119 are provided at the lower end of the outer closing plate 107. Fig. 22 As shown, such an arrangement can make the axial distances between the spiral rods on both sides of the first closed fixed ring plate group 14 and / or the second closed fixed ring plate group 15 different, and after the first connection point or the second connection point is disconnected, the distances between the disconnected spiral rods can be different, such as Fig. 22As shown, the two dehydration screws 11 can continue to maintain the cross arrangement of the spiral blades 2 40 therebetween, so that the dehydration effect is better. In addition, the distance between the concentrating screw 12 and the concentrating screw 2 13 is increased to adapt to the formation of a circulation flow path between the concentrating area 1 13 and the concentrating area 2 114, so that when the water content of the incoming sewage is too high, a circulation loop is formed between the concentrating area 1 13 and the concentrating area 2 114, so that the dehydration effect is better without adding equipment, and the other dehydration area 115 can also continue the dehydration operation, so as to better improve the work efficiency. The contour shape of the first elliptical groove 118 and the second elliptical groove 119 can be set to be similar to the contour of the upper half of the rotating slide hole 3 93 or the rotating slide hole 4 94, and the size is based on the outer periphery of the support ring 3 64 and the ring 4 65 after the screw rod connection is disconnected.

[0061] Fig.21 (a) shows that in order to better ensure the dehydration effect, the first inner spiral rod group 9 and the second inner spiral rod group 10 are arranged to cross each other, while (b) shows a schematic diagram when the water content of the input sewage is high and it is necessary to concentrate it in the concentration area for a longer time. At this moment, the first closed fixed ring plate group 14 is in a closed state. At the same time, the distance between the two concentrating spiral rods 12 and the two concentrating spiral rods 13 is increased, and the state of crossing each other is changed to a state of separation. Such an arrangement can adapt to the situation that when a circulating sewage channel is formed between the concentrating area 1 13 and the concentrating area 2 114, when the concentrating spiral rods of the first inner spiral rod group 9 and the concentrating spiral rods of the second inner spiral rod group 10 are reversed, there will be no interference between the spiral rods, which can adapt to the circulating sewage channel, so that the concentration operation can be carried out quickly.

[0062] To facilitate those skilled in the art to understand the sewage treatment equipment of the present application, the working principle of the sewage treatment equipment is described as follows: The sewage treatment equipment of the present application includes two modes during operation:

[0063] The first mode is as follows Figure 7As shown, the spiral blades between the first inner spiral rod group 9 and the second inner spiral rod group 10 in the filter chamber 2 will not interfere with each other. The sewage entering from the sewage feed bin 1 enters the filter chamber 2 through the liquid outlet 83. The two power input heads 1 43 input power in the same rotation direction, so that the concentrating spiral rod 1 12, the concentrating spiral rod 2 13 and the dehydrating spiral rod 11 rotate. The sewage is concentrated by the spiral blade 1 35, and the concentrated sewage is further concentrated by the spiral blade 2 40. Finally, as the pitch of the spiral blade 2 40 becomes smaller and smaller, the sludge can be dehydrated into The mud blocks with low water content are crushed by the mud pressing assembly 8 to complete the sewage treatment. When it is detected that the water content entering the sewage feed bin 1 is high and a more sufficient concentration operation is required, the upper closing plate group 105 and the lower closing plate group 106 of the first closed fixed ring group 14 and / or the second closed fixed ring group 15 are driven to approach each other, and the inner sliding start plate 110 extends into the interface between adjacent concentrating spiral rods, or the interface between the concentrating spiral rod and the dehydration spiral rod 11, and the driving rack on one side of the inner sliding start plate 110 drives the telescopic driving gear 48 to rotate. The rotating telescopic driving gear 48 meshes with the telescopic rack 49, and finally drives the telescopic locking pin 47 to retract into the hexagonal engagement groove 50. In addition, one side of the disengaged screw body 1 34 and / or one side of the disengaged screw body 2 39 are received by the semicircular groove 108 and the semicircular groove 2 109 of the lower sealing plate group 106, and the rotation direction of the two power input heads 1 43 is changed, so that the sewage circulation is formed in the concentration area 1 and / or the concentration area 2 114. If the first closed fixed ring plate group 14 and the second closed fixed ring plate group 15 are both closed, the concentration screw rod 2 The power coupling head 13 inputs the driving force of the power input source, and makes the two concentrating screw rods 13 rotate in opposite directions. When the water content of the sewage reaches the predetermined requirement, the upper sealing plate group 105 and the lower sealing plate group 106 of the first closed fixed ring plate group 14 and / or the second closed fixed ring plate group 15 are opened, and the telescopic rack 49 slides out of the hexagonal coupling groove 150 again, so as to realize the coupling between the concentrating screw rod and the dehydrating screw rod 11. In addition, the first inner screw rod group 9 and the second inner screw rod group 10 rotate in the same direction, so that the sewage treatment can continue.

[0064] The second mode is as follows Figure 21-22As shown, the spiral blades between the first inner spiral rod group 9 and the second inner spiral rod group 10 in the filter chamber 2 interfere with each other, so that the sewage stirring effect can be better and the sewage treatment effect can be better. The sewage entering from the sewage feed bin 1 enters the filter chamber 2 through the liquid outlet 83, and the two power input heads 43 input power with the same rotation direction, so that the concentrating spiral rod 12, the concentrating spiral rod 2 13 and the dehydration spiral rod 11 rotate, and the sewage is concentrated by the spiral blade 1 35, and the concentrated sewage is further concentrated by the spiral blade 2 40. Finally, as the pitch of the spiral blade 2 40 becomes smaller and smaller, the sludge can be dehydrated into mud blocks with less water content, and the mud blocks are crushed by the mud pressing component 8 to complete the sewage treatment. When it is detected that the water content entering the sewage feed bin 1 is high and a more sufficient concentration operation is required, the first closed fixed ring plate group 14 is driven The upper closing plate group 105 and the lower closing plate group 106 of the and / or second closed fixed ring plate group 15 are close to each other, and the inner sliding start plate 110 extends into the interface between adjacent concentrating spiral rods, or the interface between the concentrating spiral rod and the dehydration spiral rod 11. The driving rack on one side of the inner sliding start plate 110 drives the telescopic driving gear 48 to rotate, and the rotating telescopic driving gear 48 engages the telescopic rack 49, and finally drives the telescopic locking pin 47 to retract into the hexagonal engagement groove 50. In addition, one side of the disengaged screw body 34 and / or one side of the disengaged screw body 39 are received by the first elliptical groove 118 and the second elliptical groove 119 of the lower closing plate group 106, and then the telescopic set 1 44 and / or the first telescopic set 46 and / or the telescopic set 2 45 are driven to extend, so that the spacing between the concentrating spiral rods becomes larger, and the spiral blades 35 are changed from crossing each other to being separated from each other, such as Fig.21 As shown in (b), the rotation direction of the two power input heads 43 is changed, so that a sewage circulation flow is formed in the concentration zone 1 and / or the concentration zone 2 114. If the first closed fixed ring plate group 14 and the second closed fixed ring plate group 15 are both closed, the power coupling head 38 of the concentration screw rod 2 13 inputs the driving force of the power input source, and the rotation directions of the two concentration screw rods 2 13 are opposite. When the water content of the sewage reaches the predetermined requirement, the power input of the concentration screw rod is stopped, and then the telescopic set 44 and / or the first closed fixed ring plate group 15 are closed. The telescopic set 46 and / or the telescopic set 45 are retracted, and finally the concentrating spiral rod and the dehydrating spiral rod 11 are positioned opposite to each other, and then the upper closed plate set 105 and the lower closed plate set 106 of the first closed fixed ring plate set 14 and / or the second closed fixed ring plate set 15 are opened, and the telescopic rack 49 slides out of the hexagonal joint groove 50 again to achieve the connection between the concentrating spiral rod and the dehydrating spiral rod 11. In addition, the first inner spiral rod set 9 and the second inner spiral rod set 10 rotate in the same direction, so that the sewage treatment can continue. In the above two operating modes, the dehydrating spiral rod 11 can operate independently of the concentrating spiral rod, so that the sewage treatment effect can be better.

[0065] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device, comprising: A sewage feed bin (1), a filter chamber (2) and a sludge discharge assembly (3), wherein the filter chamber (2) is formed by a plurality of fixed ring plates (4) and movable ring plates (5) stacked in sequence, a first inner screw rod group (9) and a second inner screw rod group (10) are arranged in the filter chamber (2), the first inner screw rod group (9) and the second inner screw rod group (10) both include a dehydration screw rod (11) and a plurality of concentration screw rods, and the dehydration screw rod (11) is rotatably arranged On the sludge discharge assembly (3), one end of the dewatering spiral rod (11) is provided with a power joint head 2 (42), and the other end is provided with a clutch joint group 3 (41), and the two ends of the concentrating spiral rod are respectively provided with a clutch joint group 1 (36) and a clutch joint group 2 (37), and the plurality of concentrating spiral rods are detachably connected at a first connection point formed by the clutch joint group 1 (36) and the clutch joint group 2 (37), and the concentrating spiral rods close to the dewatering spiral rod (11) are detachably connected at a first connection point formed by the clutch joint group 1 (36) and the clutch joint group 2 (37). The first connection point formed by the clutch joint group (36) and the clutch joint group (41) is detachably connected, and the concentrating screw rod away from the dehydrating screw rod (11) is connected to the power input head (43) through the clutch joint group (37). The power input head (43) is rotatably arranged at the sewage feed bin (1). The fixed ring piece (4) located at the first connection point is the second closed fixed ring piece group (15), and the fixed ring piece (4) located at the second connection point is the first closed fixed ring piece group (14), the first closed fixed ring sheet group (14) and the second closed fixed ring sheet group (15) have the same structure, both comprising a movable upper closed plate group (105) and a lower closed plate group (106), and when the upper closed plate group (105) and the lower closed plate group (106) abut against each other, the filter cavity (2) on both sides of the first closed fixed ring sheet group (14) and / or the second closed fixed ring sheet group (15) can be cut off, so that the first connection point and / or the second connection point are disconnected;The filter cavity (2) is bounded by the second connection point, the filter cavity (2) where the dehydration spiral rod (11) is located is a dehydration zone (115), and the filter cavity (2) where the plurality of concentrating spiral rods are located is a concentrating zone. When the sewage feed bin (1) enters the concentrating zone and needs to be repeatedly concentrated, the upper closed plate group (105) and the lower closed plate group (106) of the first closed fixed ring plate group (14) or the second closed fixed ring plate group (15) are abutted against each other, the first connection point or the second connection point is disconnected, and the filter cavity (115) from the sewage feed bin (1) to the first closed fixed ring plate group (14) or the second closed fixed ring plate group (15) is closed. 2) forming a relatively closed space, then driving the concentrating spiral rod of the first inner spiral rod group (9) and the concentrating spiral rod of the second inner spiral rod group (10) to rotate in opposite directions, so that the sewage forms a circulation flow in the relatively closed space, forming a circulation flow path in the closed space, and after the sewage is concentrated to a certain extent, the upper sealing plate group (105) and the lower sealing plate group (106) are opened, and the concentrated sewage enters the next concentration area, or enters the dehydration area (115), and the rotation driving directions of the power input heads (43) of the first inner spiral rod group (9) and the second inner spiral rod group (10) are changed from opposite to the same; the concentrating spiral rod comprises A screw body (34) and a spiral blade (35) arranged on the screw body (34), the clutch joint group (36) and the clutch joint group (37) are respectively arranged at the two ends of the screw body (34), the clutch joint group (36) includes a hexagonal joint groove (50) and a telescopic drive gear (48) located thereon, the clutch joint group (37) includes a hexagonal joint groove (51), a telescopic lock pin (47) is slidably arranged in the hexagonal joint groove (50), a telescopic rack (49) is arranged on the upper end of the telescopic lock pin (47), and the telescopic rack (49) is connected to the telescopic drive gear (48) meshing, the teeth of the telescopic driving gear (48) are exposed on the side of the end plate of the screw body (34), the dehydration screw (11) includes a screw body (39) and a spiral blade (40) arranged outside the screw body (39), the clutch joint group (41) and the power joint head (42) are respectively arranged at both ends of the screw body (39), the clutch joint group (41) includes a hexagonal joint groove (53), and the rotation of the telescopic driving gear (48) drives the telescopic lock pin (47) to enter and exit the hexagonal joint groove (51) or the hexagonal joint groove (53). ; 2. A sewage treatment equipment according to claim 1, characterized in that: The first closed fixed ring sheet group (14) and the second closed fixed ring sheet group (15) both further include a ring sheet body three (101) and a plurality of fixed brackets two (102) arranged on the outer periphery thereof, an inner filter hole four (104) is provided inside the ring sheet body three (101), a fixed hole three (103) is provided on the fixed bracket two (102), a vertical through groove (117) is provided in the ring sheet body three (101) in a direction perpendicular to the inner filter hole four (104), the upper closed plate group (105) and the lower closed plate group (106) are respectively inserted into the ring sheet body three (101) from the upper and lower ends of the vertical through groove (117), the upper closed plate group (105) The structure is the same as that of the lower closing plate group (106), and both include an outer closing plate (107) and an inner sliding start plate (110) slidably arranged in the outer closing plate (107). A semicircular groove 1 (108) and a semicircular groove 2 (109) are also provided at the inner end of the outer closing plate (107). A driving rack is provided on the side of the inner sliding start plate (110) close to the telescopic driving gear (48). The inner sliding start plate (110) moves inward, so that the telescopic driving gear (48) rotates, thereby driving the telescopic locking pin (47) to extend and retract, so that the telescopic locking pin (47) is completely retracted into the hexagonal joint groove 1 (50) when the upper closing plate group (105) and the lower closing plate group (106) are closed.

3. A sewage treatment equipment according to claim 1, characterized in that: The fixed ring piece (4) comprises a ring piece body (16) and a plurality of fixed brackets (17) arranged on the outer periphery of the ring piece body (16); a fixed hole (18) is arranged on the fixed bracket (17); an inner filter hole (19) is opened on the inner side of the ring piece body (16); the contour curve of the inner filter hole (19) consists of a semicircular arc (24), a straight segment (25), a semicircular arc (26), a semicircular arc (27), a straight segment (28), a semicircular arc (29), a straight segment (30), and a straight segment (4); the left ends of the straight segment (25) and the straight segment (4) are respectively connected to the semicircular arc (24). The upper and lower ends of the straight segment 1 (25) are connected, the right end of the straight segment 4 is connected to the upper end of the semicircular arc 2 (26), the right end of the semicircular arc 2 (26) is connected to the lower end of the semicircular arc 2 (26), the right end of the semicircular arc 2 (26) intersects with the left end of the semicircular arc 3 (27), the upper end of the semicircular arc 3 (27) is connected to the left end of the straight segment 2 (28), the lower end of the semicircular arc 3 (27) is connected to the left end of the straight segment 3 (30), the right end of the straight segment 2 (28) is connected to the upper end of the semicircular arc 4 (29), and the right end of the straight segment 3 (30) is connected to the lower end of the semicircular arc 4 (29).

4. A sewage treatment equipment according to claim 3, characterized in that: The center of the semicircular arc 1 (24) is O1, the center of the semicircular arc 2 (26) is O2, the center of the semicircular arc 3 (27) is O3, and the center of the semicircular arc 4 (29) is O4. The distance between O1 and O2 is L1, the distance between O3 and O4 is L2, and the distance between O2 and O3 is L3. L1=L2. The size of L3 is equal to the sum of the radius of the screw body 1 (34) of the first inner screw rod group (9) and the radius of the screw body 1 (34) of the second inner screw rod group (10). The size of L3 is also equal to the sum of the radius of the screw body 2 (39) of the first inner screw rod group (9) and the radius of the screw body 2 (39) of the second inner screw rod group (10). L1 is equal to the height of the second spiral blade (40) or the height of the spiral blade 1 (35).

5. A sewage treatment equipment according to claim 3, characterized in that: The movable ring piece (5) comprises a ring piece body 2 (20) and a sliding bracket 1 (21) arranged on the outer periphery thereof, an inner filter hole 2 (23) is arranged in the ring piece body 2 (20), and a sliding hole 1 (22) is arranged on the sliding bracket 1 (21), and the shape of the inner filter hole 2 (23) is the same as that of the inner filter hole 1 (19).

6. A sewage treatment equipment according to claim 3, characterized in that: The sludge discharge assembly (3) comprises a cavity mounting seat (7), a mud pressing assembly (8) and a motor mounting seat group (6); the cavity mounting seat (7) comprises a right support seat (69); an inner filter hole three (70), a fixed hole two (56) and a sliding hole two (71) are arranged on the right support seat (69); the shape of the inner filter hole three (70) is the same as the shape of the inner filter hole one (19); a fixed shaft one (32) and a sliding shaft two (33) are arranged between the sewage feed bin (1) and the cavity mounting seat (7); the fixed shaft one (32) and the sliding shaft two (33) are arranged between the sewage feed bin (1) and the cavity mounting seat (7); The fixing hole 1 (18) of the ring plate (4) passes through the fixing shaft 1 (32), and the sliding hole 1 (22) of the movable ring plate (5) passes through the sliding shaft 2 (33). One end of the fixing shaft 1 (32) is arranged on one side of the sewage feed bin (1), and the other end passes through the fixing hole 2 (56) and is fixedly arranged on the right support seat (69). One end of the sliding shaft 2 (33) is arranged on one side of the sewage feed bin (1), and the other end passes through the sliding hole 2 (71) and is fixedly arranged on the right support seat (69).

7. A sewage treatment equipment according to claim 4, characterized in that: A telescopic sleeve assembly (44) is also sleeved between the two power input heads (43). The telescopic sleeve assembly (44) includes a sleeve ring (57), a sleeve ring (58) and a telescopic cylinder (61) arranged between the sleeve ring (57) and the sleeve ring (58). A blocking edge ring (59) is arranged on one side of the sleeve ring (57), and a blocking edge ring (60) is arranged on one side of the sleeve ring (58). The sleeve ring (58) is slidably arranged in a rotating sliding hole (85) opened in the side wall of the sewage feed bin (1). The sleeve ring (57) is slidably arranged in a rotating sliding hole (84) opened in the side wall of the sewage feed bin (1). The length of the blocking edge ring (59) is greater than or equal to L1.

8. A sewage treatment equipment according to claim 1, characterized in that: The first closed fixed ring sheet group (14) and the second closed fixed ring sheet group (15) both further include a ring sheet body three (101) and a plurality of fixed brackets two (102) arranged on the outer periphery thereof, an inner filter hole four (104) is provided inside the ring sheet body three (101), a fixed hole three (103) is provided on the fixed bracket two (102), a vertical through groove (117) is provided in the ring sheet body three (101) in a direction perpendicular to the inner filter hole four (104), the upper closed plate group (105) and the lower closed plate group (106) are respectively inserted into the ring sheet body three (101) from the upper and lower ends of the vertical through groove (117), and the upper closed plate group (105) and the lower closed plate group (106) are respectively inserted into the ring sheet body three (101) from the upper and lower ends of the vertical through groove (117). The lower closing plate group (106) has the same structure, and both include an outer closing plate (107) and an inner sliding start plate (110) slidably arranged in the outer closing plate (107). A first elliptical groove (118) and a second elliptical groove (119) are also provided at the inner end of the outer closing plate (107). A driving rack is provided on one side of the inner sliding start plate (110) close to the telescopic driving gear (48). The inner sliding start plate (110) moves inward, so that the telescopic driving gear (48) rotates, thereby driving the telescopic locking pin (47) to extend and retract, so that the telescopic locking pin (47) is completely retracted into the hexagonal joint groove 1 (50) when the upper closing plate group (105) and the lower closing plate group (106) are closed.

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