Horizontal spiral sedimentation filtering centrifugal machine and disassembly and assembly method thereof

Abstract

The invention discloses a horizontal spiral sedimentation filtering centrifugal machine and a dismounting and mounting method thereof, and belongs to the technical field of centrifugal machines. The method comprises the following steps: hoisting the front shell through a hoisting belt, and firstly dismounting the front shell; hoisting the two hoisting connection points on the cylinder body through a hoisting belt, dismounting the first bolt, and moving the cylinder body forwards to dismount the cylinder body; the material blocking ring is firstly dismantled, the bottom of the spiral body is hoisted through a hoisting belt, then the fourth bolt and the fifth bolt are dismantled, and the spiral body is moved forwards to be dismantled; a sixth bolt and a seventh bolt are detached firstly, and a pressing ring is taken down; the two hooking pieces are hooked in the two hooking holes, and the filter screen is moved forwards so as to be dismantled; the L-shaped lifting appliance is connected with the connecting screw hole through a bolt, the first driving shaft is moved forwards to be dismounted, and then the differential driving structure is separated from the second driving shaft; and an eighth bolt and a bearing cover are dismantled, an L-shaped lifting appliance is connected with a screw hole corresponding to the eighth bolt through a bolt, a driving wheel at the rear end of the second driving shaft is dismantled, and the second driving shaft is moved forwards to be dismantled.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifuges, and in particular relates to a horizontal spiral sedimentation filtering centrifuge and a disassembly and assembly method thereof. Background Art

[0002] Ferric phosphate is a precursor for the synthesis of lithium iron phosphate. It is synthesized from an iron salt and a phosphate (or phosphoric acid). For example, ferric phosphate is obtained by reacting a phosphate, a ferrous salt, and an oxidant. Conventional ferric phosphate can be prepared using ammonium phosphate, ferric sulfate, and hydrogen peroxide.

[0003] For example, patent application number CN202110451047.X discloses a method for preparing battery-grade anhydrous ferric phosphate from industrial ammonium phosphate clear solution or industrial ammonium phosphate mother solution, comprising the following steps: S1. Fluoride removal: adding diatomaceous earth and sodium carbonate solution to the industrial ammonium phosphate clear solution or industrial ammonium phosphate mother liquor, and then filtering to obtain a phosphorus solution after defluorination; S2 refining: the pH value of the phosphorus-containing solution obtained in step S1 is adjusted, and impurities such as calcium, magnesium, manganese, and aluminum are removed by precipitation reaction to obtain a phosphorus-containing solution having a low impurity ion content; S3 heavy metal removal: adding a heavy metal precipitant to the low impurity ion content of the phosphorus-containing solution obtained in step S2 to remove heavy metal impurities to obtain a refined phosphate solution; S4 synthesis of ferric phosphate dihydrate: the refined phosphate solution obtained in step S3 and the ferrous sulfate solution are fully reacted in the presence of an oxidizing agent, and then filtered, the filter cake is washed and dried to obtain ferric phosphate dihydrate; S5. Preparation of battery-grade anhydrous ferric phosphate: The ferric phosphate dihydrate obtained in step S4 is calcined to remove crystal water to obtain battery-grade anhydrous ferric phosphate.

[0004] The above process will produce ammonium sulfate as a by-product. The ammonium sulfate solution is concentrated, crystallized, solid-liquid separated and dried to obtain ammonium sulfate solid product. The applicant found in the actual production process that if a horizontal spiral sedimentation filter centrifuge is used for solid-liquid separation, the water content of the output material is about 1%, and no drying is required. This not only reduces the number of steps but also reduces energy consumption.

[0005] The structure of an existing horizontal spiral sedimentation filter centrifuge can be seen in patent application number CN200420080685.7, which discloses a horizontal pre-thickening centrifuge, which mainly includes: a casing, a cover provided at one end of the casing, a differential transmission device provided at the other end of the casing, a drum and a spiral body provided within the casing, the spiral body being located in the inner cavity of the drum, and spiral blades provided on the outer wall of the spiral body; a feed pipe leading into the inner cavity of the spiral body, a feed port provided on the side wall of the spiral body, and an overflow hole provided on the rotating wall plate; the diameter of the drum cylinder near the rotating wall plate is larger than the diameter of the drum cylinder near the drum discharge port; and a filtering through hole is provided on the side wall of the drum near the drum discharge port. The above-mentioned centrifuge can be used to pre-thicken materials and is suitable for dehydrating, sorting and recovering small particles and materials with low solid concentrations. It has high working efficiency and low moisture content in the finished product. The machine has a wide range of uses.

[0006] Horizontal spiral decanter centrifuges usually need to operate at high temperatures (crystallization liquid temperature greater than 80°C) and high speeds (design speed is usually 1000-1200rpm), and the distance between the spiral and the drum is very small (about 1mm). To ensure good separation effect, horizontal spiral decanter centrifuges need to be disassembled and assembled regularly for maintenance (such as replacement, repair, dynamic balancing, differential oil change (oil change is required every 3-6 months), etc.). Summary of the Invention

[0007] The embodiment of the present invention provides a horizontal spiral sedimentation filter centrifuge and a disassembly method thereof, which is easy to disassemble and assemble. The technical solution is as follows: On the one hand, an embodiment of the present invention provides a horizontal spiral sedimentation filter centrifuge, including a casing 1, a transmission casing 2, a differential drive structure 3, a spiral body 4, a drum 5, a feed pipe 6 at the front of the casing 1, a retaining ring 7 in the middle of the spiral body 4, a drive shaft 1 8 for driving the spiral body 4 and a drive shaft 2 9 for driving the drum 5; the casing 1, the transmission casing 2 and the differential drive structure 3 are arranged in sequence from front to back, and the drive shaft 1 8 is coaxially arranged in the drive shaft 2 9; the rear ends of the drive shaft 1 8 and the drive shaft 2 9 are both transmission-connected with the differential drive structure 3, and their front ends are respectively provided with a flange 10 and a flange 2 11; the drive shaft 2 9 is rotatably arranged in the transmission casing 2, and the end of the feed pipe 6 is bent backward and passes through the retaining ring backward. 7. The drum 5 includes a cylinder and a wall panel 36 at its rear end. The cylinder includes a small straight section, a tapered section and a large straight section arranged in sequence from front to back. The wall panel 36 is rotatably arranged on the casing 1 and is connected to the flange 2 11; the rear end of the large straight section is connected to the edge of the wall panel 36 by a first bolt 12; the casing 1 includes a front casing and a rear casing 13, the front casing and the rear casing 13 are connected by a second bolt 14 and the connection is located at the front of the large straight section, the front side of the rear casing 13 is open and an inspection port is provided on the upper part of the rear side; the inspection port is located directly behind the first bolt 12 at the top of the wall panel 36 and is closed by a cover plate 35 on the rear side; the cover plate 35 is fixed to the rear casing 13 by bolts and is located at the transmission casing Above the body 2; a fixing ring 15 is provided in the middle part of the spiral body 4, and a fixed end face 16 is provided in the rear part thereof; the retaining ring 7 is fixed to the front side of the fixing ring 15 by a third bolt 17, and a protrusion is provided in the middle part of the front side of the flange 10, and a stepped hole 18 is provided in the middle part of the fixed end face 16 that cooperates with the flange 10 and the protrusion; the flange 10 and the protrusion are embedded in the stepped hole 18, and a shaft cover 19 is provided on the front side of the fixed end face 16; the shaft cover 19 is connected to the protrusion by a fourth bolt 20 at the center of its circle; the fixed end face 16 is connected to the flange 10 by a fifth bolt 21; the shaft cover 19 is provided on the front side of the fixed end face 16, and its diameter is smaller than the inner diameter of the fixing ring 15, which covers the fifth bolt 21 Shield; a plurality of connecting screw holes 32 are provided on the protruding portion and around the fourth bolt 20, and a bearing cover 33 is provided on the front side of the flange 2 11, and the bearing cover 33 is rotatably connected to the drive shaft 1 8 and is fixed to the flange 2 11 by an eighth bolt 34; the screw hole of the eighth bolt 34 and the connecting screw hole 32 are arranged in a front-to-back correspondence; the front end and the rear end of the outer side of the drum 5 are each provided with a lifting connection point 27, and the two lifting connection points 27 are located on the same front-to-back vertical plane; a filter screen 22 is detachably provided in the small straight cylinder section, and a limiting ring 23 cooperating with the filter screen 22 is coaxially provided at the rear end thereof, and a pressure ring 24 is provided at the front end thereof; the pressure ring 24 is fixed to the small straight cylinder section by a sixth bolt 25 and is pressed against the front side of the filter screen 22;The rear end of the filter 22 rests against the retaining ring 23 and is secured to the small straight section via a plurality of radially arranged seventh bolts 26. The screw holes corresponding to the two opposing seventh bolts 26 serve as hook holes for removing the filter 22. The screw holes corresponding to the eighth bolts 34 and the connecting screw holes 32 can both be connected to the L-shaped hanger 30. The screw holes corresponding to the sixth bolts 25 and the screw holes corresponding to the first bolts 12 are arranged one after the other and can be connected to the two arms of the clamping hanger 31.

[0008] Among them, the spiral body 4 in the embodiment of the present invention is coaxially arranged in the drum 5, and a liquid outlet is provided in the middle thereof and corresponding to the conical cylinder section, and its rear part is sleeved on the outside of the flange 11; a through hole is provided on the small straight cylinder section, and an overflow hole is provided on the wall panel 36. The feed pipe 6 is vertically downwardly arranged on the upper front side of the casing 1 and is located in front of the drum 5, and the front end of the filter screen 22 is flipped outward to form a folded edge.

[0009] The housing 1 in the embodiment of the present invention has a material discharge port on the lower front side, an exhaust port on the upper middle side, and a liquid discharge port on the lower middle side.

[0010] Specifically, the second bolt 14 in the embodiment of the present invention is arranged backward, its specification is M16×50, and the number is 16; the first bolt 12 is arranged forward, its specification is M16×40, and the number is 16; the third bolt 17 is arranged backward, its specification is M10×25, and the number is 8; the fifth bolt 21 is arranged backward, its specification is M10×30, and the number is 6; the sixth bolt 25 is arranged backward, its specification is M12×25, and the number is 12; the seventh bolt 26 is arranged outward, its specification is M6×10, and the number is 6; the eighth bolt 34 is arranged backward, its specification is M16×45, and the number is 4.

[0011] Specifically, the inspection port in the embodiment of the present invention is rectangular, and the cover plate 35 is a rectangular plate and is fixed to the rear housing 13 by four bolts.

[0012] Among them, the shaft cover 19 in the embodiment of the present invention is a frustum structure with a small front and a large rear, and a frustum groove coaxially provided on its rear side to match it; multiple fifth bolts 21 are evenly distributed around the axis of the flange 10, and they are located on the same circle, and the diameter of the circle they are located on is smaller than the diameter of the shaft cover 19.

[0013] On the other hand, the disassembly and assembly method of the horizontal spiral sedimentation filter centrifuge in the embodiment of the present invention comprises: S1: Remove the front casing: Use the lifting strap 28 to lift the bottom of the front casing, remove the second bolt 14, and move the front casing forward to remove the front casing.

[0014] S2: Remove the cylinder: first remove the cover plate 35, lift the two lifting connection points 27 on the cylinder through the lifting belt 28, remove the first bolt 12 through the inspection port, and move the cylinder forward to remove the cylinder.

[0015] S3 removes the spiral body: first remove the third bolt 17 to remove the retaining ring 7, lift the bottom of the spiral body 4 through the sling 28, then remove the fourth bolt 20 and the fifth bolt 21, take out the shaft cover 19 from the center hole of the fixing ring 15, and move the spiral body 4 forward to remove the spiral body 4.

[0016] S4: Remove the filter screen: first remove the sixth bolt 25 and the seventh bolt 26, take down the pressing ring 24; hook the two hooking members 29 in the two hooking holes, and move the filter screen 22 forward to remove the filter screen 22.

[0017] S5: Dismantle the differential drive structure and drive shaft 1: Connect the L-shaped hanger 30 to the connecting screw hole 32 with bolts, remove the eighth bolt 34 and the bearing cover 33, move the drive shaft 1 8 forward to remove the drive shaft 1 8, and then separate the differential drive structure 3 from the drive shaft 2 9.

[0018] S6: Remove the second drive shaft: connect the L-shaped hanger 30 to the screw hole corresponding to the eighth bolt 34 through bolts, remove the driving wheel 37 at the rear end of the second drive shaft 9, and move the second drive shaft 9 forward to remove the second drive shaft 9.

[0019] After step S1, the following steps may be performed: S7 removes the spiral body and the drum: removes the driving wheel 37 at the rear end of the driving shaft 2 9, first removes the cover plate 35, removes the first bolt 12 at the top through the inspection port, and removes the sixth bolt 25 at the top; uses bolts to connect the lower ends of the two arms of the plywood hanger 31 to the screw holes corresponding to the first bolt 12 at the top and the sixth bolt 25 at the top; pulls the plywood hanger 31 forward to remove the spiral body 4 and the drum 5.

[0020] The rear portion of the plywood hanger 31 in the embodiment of the present invention can be placed in the rear housing 13 , and the upper portion of the L-shaped hanger 30 is bent backward to the top of the rear housing 13 .

[0021] The technical solution provided by the embodiment of the present invention has the following beneficial effects: 1. Easy to disassemble and assemble, low labor intensity.

[0022] 2. Only four tools are needed for auxiliary disassembly and assembly, namely slings, L-shaped slings, plywood slings and hooks.

[0023] 3. Can be disassembled and assembled on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 11 is a schematic structural diagram of a horizontal spiral sedimentation filter centrifuge in an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the housing before removal; Figure 3 yes Figure 2 Schematic diagram of the cylinder being dismantled; Figure 4 yes Figure 3 Schematic diagram of the removal of the spiral; Figure 5 yes Figure 3 Schematic diagram of removing the filter; Figure 6 yes Figure 4 Schematic diagram of the drive shaft 1 being removed; Figure 7 yes Figure 6 Schematic diagram of the dismantling of drive shaft 2; Figure 8 yes Figure 2 Schematic diagram of the drive shaft 1, drive shaft 2 and spiral body being removed together.

[0025] In the figure: 1 casing, 2 transmission housing, 3 differential drive structure, 4 spiral, 5 drum, 6 feed pipe, 7 baffle ring, 8 drive shaft 1, 9 drive shaft 2, 10 flange 1, 11 flange 2, 12 first bolt, 13 rear casing, 14 second bolt, 15 fixing ring, 16 fixing end face, 17 third bolt, 18 stepped hole, 19 shaft cover, 20 fourth bolt, 21 fifth bolt, 22 filter screen, 23 limit ring, 24 pressure ring, 25 sixth bolt, 26 seventh bolt, 27 lifting connection point, 28 lifting belt, 29 hook, 30 L-shaped sling, 31 plywood sling, 32 connecting screw hole, 33 bearing cover, 34 eighth bolt, 35 cover plate, 36 wall panel, 37 driving wheel. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Example 1 See also Figure 1-8Example 1 provides a horizontal spiral sedimentation filter centrifuge, including a casing 1, a transmission casing 2, a differential drive structure 3, a spiral body 4, a drum 5, a feed pipe 6, a retaining ring 7, a drive shaft 1 8 and a drive shaft 2 9. The casing 1, the transmission casing 2 and the differential drive structure 3 are arranged in sequence from front to back. A discharge port (vertically downwardly arranged) is provided on the lower front side of the casing 1, an exhaust port (vertically upwardly arranged) is provided on the upper middle side thereof, and a liquid outlet (to the left or right) is provided on the lower middle side thereof. The spiral body 4, the drum 5, the drive shaft 1 8 and the drive shaft 2 9 are all arranged in the front-to-back direction. The spiral body 4 and the drum 5 rotate in the same direction, and both are structures with a small front and a large rear, and their shapes match. The rotation speed of the drum 5 is greater than the rotation speed of the spiral body 4. The differential drive structure 3 drives the spiral body 4 and the drum 5 through the drive shaft 1 8 and the drive shaft 2 9 respectively.

[0028] Among them, the drive shaft 1 8 is coaxially arranged in the drive shaft 2 9 (with a bearing cover 33 in between). The rear ends of the drive shaft 1 8 and the drive shaft 2 9 are both connected to the differential drive structure 3, and the front ends thereof are coaxially provided with flange 10 and flange 2 11 respectively. Flange 2 11 is located in front of flange 10. The drive shaft 2 9 is rotatably arranged in the transmission housing 2. The spiral body 4 is coaxially arranged in the drum 5, and a liquid outlet is provided in the middle and corresponding to the conical section. The rear part thereof is sleeved on the outside of flange 2 11, and its shape matches the drum 5. The feed pipe 6 is vertically downwardly arranged on the upper front side of the casing 1, which is located in front of the drum 5, and its end is bent backward (specifically, an arc bend) and passes through the retaining ring 7 backward. The drum 5 comprises a cylindrical body and a wall panel 36 at its rear end. The cylindrical body comprises, from front to back, a small straight section, a tapered section, and a large straight section. Both the small and large straight sections are straight, with the inner diameter of the small straight section smaller than that of the large straight section. The tapered section is tapered, with a smaller front section and a larger rear section. Wall panel 36 is rotatably mounted on the housing 1 and connected to flange 2 11. It is provided with an overflow hole. The small straight section has a through hole and a removable filter screen 22 mounted on its inner wall.

[0029] The rear end of the large straight section is connected to the edge of the wall panel 36 via a first bolt 12. The housing 1 includes a front housing and a rear housing 13. The rear housing 13 is fixedly connected to the transmission housing 2, and the discharge port, exhaust port, and liquid outlet are all located on the front housing. The front and rear housings 13 are connected via a second bolt 14, and their connection is located at the front of the large straight section. The front side of the rear housing 13 is open, and an inspection port is provided on the upper rear side. The inspection port is located directly behind the first bolt 12 at the top of the wall panel 36 and is closed by a rear cover 35, which is specifically a vertically arranged rectangular port. The cover 35 is bolted to the rear housing 13 and is located above the transmission housing 2. It is specifically a rectangular plate that cooperates with the inspection port. Specifically, the cover 35 is fixed to the rear housing 13 via four bolts (located at the four corners of the rectangular plate).

[0030] A retaining ring 15 is provided in the middle of the spiral 4, with a fixed end face 16 at its rear. The retaining ring 15 is coaxial with the spiral 4, with its rear side (angled) flush with the rear side of the retaining ring 7. The retaining end face 16 is coaxial with the spiral 4, with its front side flush with the front side of the protrusion. The retaining ring 7 is secured to the front side of the retaining ring 15 via a third bolt 17. A protrusion (specifically, a frustum) is provided in the middle of the front side of the flange 10. A stepped hole 18 (smaller in front and larger in back, a two-step hole) is provided in the middle of the retaining end face 16, which mates with the flange 10 and the protrusion. The flange 10 and the protrusion fit into the stepped hole 18. A shaft cover 19 is provided at the front side of the retaining end face 16 for sealing. The shaft cover 19 is connected to the protrusion via a fourth bolt 20 at its center. It is a frustum-shaped cone with a smaller front and a larger rear side, and a frustum-shaped groove is coaxially provided at its rear side to mate with it. The fixed end face 16 is connected to the flange 10 via a plurality of fifth bolts 21. These fifth bolts 21 are evenly distributed around the axis of the flange 10 and lie on a circle whose diameter is smaller than that of the shaft cover 19. The shaft cover 19 is located in front of the fixed end face 16. Its diameter is smaller than the inner diameter of the retaining ring 15 to facilitate removal. It shields the fifth bolts 21 and rests against the front side of the protrusion. Multiple connecting screw holes 32 are provided on the protrusion and around the fourth bolts 20. A bearing cover 33 is provided on the front side of the flange 2 11 for securing the bearing (which provides a rotational connection between the drive shaft 1 8 and the drive shaft 2 9). The bearing cover 33 is rotationally connected to the drive shaft 1 8 and secured to the flange 2 11 via an eighth bolt 34. The screw hole for the eighth bolt 34 corresponds to the connecting screw hole 32 in a one-to-one relationship. The corresponding screw hole for the eighth bolt 34 and the connecting screw hole 32 can both be connected to the L-shaped hanger 30.

[0031] The outer front and rear ends of the drum 5 each feature a lifting connection point 27 (specifically, a hanging ring, hook, connecting block, etc.). These two lifting connection points 27 are located on the same vertical plane in the forward-backward direction. A removable filter 22 is mounted within the small straight section. A retaining ring 23 is coaxially mounted within the rear end of the drum 5, engaging the filter 22. A pressure ring 24 is mounted at the front end. The pressure ring 24 is coaxially mounted with the drum 5 and is a circular ring structure. It is secured to the small straight section via a sixth bolt 25, pressing against the front side of the filter 22. The filter 22 is a cylindrical structure that engages the small straight section. Its rear end rests against the retaining ring 23, and its rear end is flush with the inner side of the front end of the tapered section. The rear end is secured to the small straight section via a plurality of radially arranged seventh bolts 26, with its front end tilted outward to form a hem (perpendicular to the filter 22). The screw holes corresponding to the two opposing seventh bolts 26 serve as hook holes for removing the filter 22 (as shown, located at the upper and lower ends, respectively). The screw holes corresponding to the sixth bolts 25 and the screw holes corresponding to the first bolts 12 are arranged one by one in front and back and can be connected to the two suspension arms of the splint hanger 31 respectively.

[0032] Example 2 Example 2 provides a horizontal spiral decanter filter centrifuge, the structure of which is basically the same as that of Example 1, except that: in this embodiment, the second bolt 14 is set rearward, has a specification of M16×50, and is 16 in number. The first bolt 12 is set forward, has a specification of M16×40, and is 16 in number. The third bolt 17 is set rearward, has a specification of M10×25, and is 8 in number. The fifth bolt 21 is set rearward, has a specification of M10×30, and is 6 in number. The sixth bolt 25 is set rearward, has a specification of M12×25, and is 12 in number. The seventh bolt 26 is set outward, has a specification of M6×10, and is 6 in number. The eighth bolt 34 is set rearward, has a specification of M16×45, and is 4 in number. The above is merely a specific example and does not limit this patent. In this patent, gaskets or sealing rings are set corresponding to the bolts.

[0033] Example 3 See also Figure 1-8 , Example 3 provides a method for disassembling and assembling a horizontal spiral sedimentation filter centrifuge, the method comprising: S1 remove the front cover: see Figure 2 , use the sling 28 (V-shaped, with the lower ends of the two arms wrapped around the front and rear of the liquid outlet respectively) to lift the bottom of the front casing, remove the second bolt 14, and move the front casing forward to remove the front casing.

[0034] S2 Dismantle the cylinder: see Figure 3 First, remove the cover plate 35, and use the lifting strap 28 (V-shaped, with two arms of different lengths, the front arm is longer) to lift the two lifting connection points 27 on the cylinder, remove the first bolt 12 through the inspection port, and move the cylinder forward to remove the cylinder.

[0035] S3 Demolition of the spirochete: see Figure 4 First, remove the third bolt 17 to remove the retaining ring 7, and use the sling 28 (V-shaped, with two arms of different lengths, the front arm is longer) to lift the bottom of the spiral body 4, then remove the fourth bolt 20 and the fifth bolt 21, take out the shaft cover 19 from the center hole of the fixing ring 15, and move the spiral body 4 forward to remove the spiral body 4.

[0036] S4 filter removal: see Figure 5 First, remove the sixth bolt 25 and the seventh bolt 26, and remove the pressure ring 24; hook the two hook members 29 into the two hook holes (the screw holes corresponding to the two seventh bolts 26), and move the filter 22 forward to remove the filter 22.

[0037] S5 dismantles the differential drive structure and drive shaft 1: see Figure 6, connect the L-shaped hanger 30 to the connecting screw hole 32 with bolts, remove the eighth bolt 34 and the bearing cover 33 (retained on the drive shaft 8), move the drive shaft 8 forward to remove the drive shaft 8, and then separate the differential drive structure 3 from the drive shaft 2 9.

[0038] S6 dismantles drive shaft 2: see Figure 7 , connect the L-shaped hanger 30 with the screw hole corresponding to the eighth bolt 34 through bolts, remove the drive wheel 37 at the rear end of the drive shaft 2 9, and move the drive shaft 2 9 forward to remove the drive shaft 2 9.

[0039] In steps S5 and S6 , the upper portion of the L-shaped hanger 30 is bent backward (forming a horizontal arm) to the top of the rear housing 13 . The hanger 30 is L-shaped, and a connecting flange is provided at the lower end of the vertical arm.

[0040] After step S1, the following steps may be performed: S7 dismantling the screw and drum: see Figure 8 Remove the drive wheel 37 at the rear end of the drive shaft 2 9. First, remove the cover plate 35. Remove the first bolt 12 and the sixth bolt 25 at the top through the inspection port. Connect the lower ends of the two arms of the clamping plate hanger 31 to the corresponding screw holes of the first bolt 12 and the sixth bolt 25 at the top. Pull the clamping plate hanger 31 forward to remove the spiral body 4 and the drum 5.

[0041] The rear portion of the plywood hanger 31 in the embodiment of the present invention can be placed in the rear housing 13 .

[0042] The order of steps S3 and S4 can be adjusted, or S4 is not executed, or S4 is executed last.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A horizontal spiral sedimentation filter centrifuge, comprising a housing (1), a transmission housing (2), a differential drive structure (3), a spiral body (4), a drum (5), a feed pipe (6) at the front of the housing (1), a retaining ring (7) at the middle of the spiral body (4), a drive shaft 1 (8) for driving the spiral body (4) and a drive shaft 2 (9) for driving the drum (5); the housing (1), the transmission housing (2) and the differential drive structure (3) are arranged in sequence from front to back, the drive shaft 1 (8) is coaxially arranged in the drive shaft 2 (9); the drive shaft 1 (8) and the drive shaft 2 (9) are arranged in a coaxial manner. The rear ends of the second drive shaft (9) are connected to the differential drive structure (3) in a transmission manner, and the front ends thereof are provided with flange 1 (10) and flange 2 (11) respectively; the second drive shaft (9) is rotatably arranged in the transmission housing (2), the end of the feed pipe (6) is bent backward and passes through the retaining ring (7) backward, the drum (5) includes a cylinder and a wall plate (36) at its rear end, the cylinder includes a small straight cylinder section, a conical cylinder section and a large straight cylinder section arranged in sequence from front to back, the wall plate (36) is rotatably arranged on the casing (1) and is connected to the second flange (11); it is characterized in that, The rear end of the large straight section is connected to the edge of the wall panel (36) by a first bolt (12); the housing (1) includes a front housing and a rear housing (13), the front housing and the rear housing (13) are connected by a second bolt (14) and the connection point is located at the front of the large straight section, the front side of the rear housing (13) is open and an inspection port is provided at the upper portion of the rear side; the inspection port is located directly behind the first bolt (12) at the top of the wall panel (36) and is closed by a cover plate (35) on the rear side; the cover plate (35) is fixed to the rear housing (13) by bolts and is located above the transmission housing (2); A fixing ring (15) is provided in the middle of the spiral body (4), and a fixing end face (16) is provided in the inner rear part thereof; the retaining ring (7) is fixed to the front side of the fixing ring (15) by a third bolt (17), a protrusion is provided in the middle of the front side of the flange (10), and a stepped hole (18) is provided in the middle of the fixing end face (16) that matches the flange (10) and the protrusion; the flange (10) and the protrusion are embedded in the stepped hole (18), and a shaft cover (19) is provided on the front side of the fixing end face (16); the shaft cover (19) is connected to the protrusion by a fourth bolt (20) at the center of the shaft cover; the fixing end face (16) is provided with a plurality of screws (14) and a plurality of screws (15) connected to the fixing end face (16) by a plurality of screws (14) and a plurality of screws (14) connected to the fixing end face (16) by ... The surface (16) is connected to the flange plate one (10) through the fifth bolt (21); the shaft cover (19) is arranged on the front side of the fixed end surface (16), and its diameter is smaller than the inner diameter of the fixing ring (15), and it shields the fifth bolt (21); a plurality of connecting screw holes (32) are provided on the protruding portion and around the fourth bolt (20); a bearing cover (33) is provided on the front side of the flange plate two (11), and the bearing cover (33) is rotatably connected to the drive shaft one (8) and is fixed to the flange plate two (11) through the eighth bolt (34); the screw hole of the eighth bolt (34) and the connecting screw hole (32) are arranged one by one in front and back correspondence; The front end and the rear end of the outer side of the drum (5) are each provided with a hoisting connection point (27), and the two hoisting connection points (27) are located on the same front-to-back vertical plane; A filter screen (22) is detachably provided in the small straight section, a limiting ring (23) cooperating with the filter screen (22) is coaxially provided in the rear end thereof, and a pressing ring (24) is provided at the front end thereof; the pressing ring (24) is fixed to the small straight section by a sixth bolt (25) and presses against the front side of the filter screen (22); the rear end of the filter screen (22) rests against the limiting ring (23), and the rear end is fixed to the small straight section by a plurality of seventh bolts (26) arranged radially; the screw holes corresponding to the two opposite seventh bolts (26) serve as hook holes for removing the filter screen (22); The screw hole corresponding to the eighth bolt (34) and the connecting screw hole (32) can both be connected to the L-shaped hanger (30); The screw hole corresponding to the sixth bolt (25) and the screw hole corresponding to the first bolt (12) are arranged one by one in front and back, and can be connected to the two suspension arms of the splint hanger (31) respectively.

2. The horizontal spiral sedimentation filter centrifuge according to claim 1, characterized in that: The spiral body (4) is coaxially arranged in the drum (5), and a liquid outlet hole is provided in the middle thereof and at the position corresponding to the conical cylinder section, and the rear portion thereof is sleeved outside the second flange (11); a through hole is provided on the small straight cylinder section, and an overflow hole is provided on the wall panel (36); the feed pipe (6) is vertically downwardly arranged on the upper front side of the casing (1) and is located in front of the drum (5); the front end of the filter screen (22) is turned outward to form a folded edge.

3. The horizontal spiral sedimentation filter centrifuge according to claim 1, characterized in that: The casing (1) is provided with a material discharge port on the lower front side, an exhaust port on the upper middle side, and a liquid discharge port on the lower middle side.

4. The horizontal spiral sedimentation filter centrifuge according to claim 1, characterized in that: The second bolt (14) is arranged backward, its specification is M16×50, and its quantity is 16; the first bolt (12) is arranged forward, its specification is M16×40, and its quantity is 16; the third bolt (17) is arranged backward, its specification is M10×25, and its quantity is 8; the fifth bolt (21) is arranged backward, its specification is M10×30, and its quantity is 6; the sixth bolt (25) is arranged backward, its specification is M12×25, and its quantity is 12; the seventh bolt (26) is arranged outward, its specification is M6×10, and its quantity is 6; the eighth bolt (34) is arranged backward, its specification is M16×45, and its quantity is 4.

5. The horizontal spiral sedimentation filter centrifuge according to claim 1, characterized in that: The inspection port is rectangular, and the cover plate (35) is a rectangular plate and is fixed to the rear casing (13) by four bolts.

6. The horizontal spiral sedimentation filter centrifuge according to claim 1, characterized in that: The shaft cover (19) is a truncated cone structure with a smaller front and a larger rear, and a truncated cone groove coaxially provided on the rear side thereof to match it; a plurality of fifth bolts (21) are evenly distributed around the axis of the flange (10), and are located on the same circle, the diameter of which is smaller than the diameter of the shaft cover (19).

7. The method for disassembling and assembling a horizontal spiral sedimentation filter centrifuge as disclosed in claim 1, characterized in that: The method comprises: S1: Remove the front casing: Use the sling (28) to lift the bottom of the front casing, remove the second bolt (14), and move the front casing forward to remove the front casing; S2: Remove the cylinder: first remove the cover plate (35), lift the two lifting connection points (27) on the cylinder through the lifting belt (28), remove the first bolt (12) through the inspection port, and move the cylinder forward to remove the cylinder; S3: Remove the spiral body: first remove the third bolt (17) to remove the blocking ring (7), hoist the bottom of the spiral body (4) through the sling (28), then remove the fourth bolt (20) and the fifth bolt (21), remove the shaft cover (19) forward from the center hole of the fixing ring (15), and move the spiral body (4) forward to remove the spiral body (4); S4: Remove the filter screen: first remove the sixth bolt (25) and the seventh bolt (26), remove the pressing ring (24); hook the filter screen (22) in the two hook holes through the two hook members (29), and move the filter screen (22) forward to remove the filter screen (22); S5: Dismantle the differential drive structure and drive shaft 1: Connect the L-shaped hanger (30) to the connecting screw hole (32) with bolts, remove the eighth bolt (34) and the bearing cover (33), move the drive shaft 1 (8) forward to remove the drive shaft 1 (8), and then separate the differential drive structure (3) from the drive shaft 2 (9); S6: Remove the second drive shaft: Connect the L-shaped hanger (30) to the screw hole corresponding to the eighth bolt (34) through the bolt, remove the driving wheel (37) at the rear end of the second drive shaft (9), and move the second drive shaft (9) forward to remove the second drive shaft (9); After step S1, the following steps may be performed: S7: Remove the spiral body and the drum: Remove the driving wheel (37) at the rear end of the second driving shaft (9), first remove the cover plate (35), remove the first bolt (12) at the top through the inspection port, and remove the sixth bolt (25) at the top; connect the lower ends of the two arms of the splint hanger (31) to the corresponding screw holes of the first bolt (12) at the top and the sixth bolt (25) at the top through bolts; pull the splint hanger (31) forward to remove the spiral body (4) and the drum (5).

8. The method according to claim 7, characterized in that The rear portion of the splint hanger (31) can be placed in the rear housing (13), and the upper portion of the L-shaped hanger (30) is bent backward to the top of the rear housing (13).

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