Sanitary disc separator vertical shaft nut and dismounting tool

Abstract

The utility model discloses a vertical shaft nut of a disc type separator, which comprises a stud part, a nut part is formed at the upper end of the stud part, the nut part is of a polygonal prism-shaped structure, the side surface of the nut part forms an edge part and a side surface part, and at least one side surface part is concaved inwards to form a clamping groove structure. According to the sanitary disc type separator vertical shaft nut, the structural design of an existing vertical shaft nut is improved, a threaded hole in the top of the vertical shaft nut is removed, and therefore materials cannot be left in the threaded hole, and cleaning dead corners cannot be formed in the position of the threaded hole. A clamping groove structure used for fixing the vertical shaft nut and a dismounting tool is arranged on the side face of the stud part. The loosened stand column nut can be conveniently taken out from the rotary drum body; and the conical groove-shaped clamping groove structure is arranged on the side surface, so that no cleaning dead angle is formed, no residue is left in the separator body, and the sanitary requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of disc separators, in particular to a vertical shaft nut and a disassembly and assembly tool for a sanitary disc separator. Background Art

[0002] A disc separator is a high-speed sedimentation centrifuge that rapidly separates mixtures such as "liquid-solid" and "liquid-liquid-solid" by the powerful centrifugal force generated by high-speed rotation. Due to its high separation efficiency and high degree of automation, it can realize full-automatic operation from feeding, separation, slag discharge and other steps, and is widely used in industries such as ships, food, medicine, chemical industry, textile and environmental protection. The drum is one of the most important components of the disc separator. The solid-liquid separation process of the material is carried out inside the drum. The drum usually consists of parts such as a drum cover, a drum body, a piston, a main locking ring, disc plates, a distributor, and a vertical shaft nut, as Figure 8 shown. The high-speed rotation of the drum is usually driven by a vertical shaft. There is a tapered hole at the bottom of the drum body, and this tapered hole fits with the conical surface of the vertical shaft to achieve the transmission of rotational torque. The axial locking of the drum and the vertical shaft is achieved by a vertical shaft nut (such as Figure 9 ). After the drum assembly is assembled, it is installed on the conical surface of the vertical shaft by a lifting tool. Then, a vertical shaft nut puller (such as Figure 10 ) is used to install the vertical shaft nut inside the drum assembly, and then a vertical shaft nut wrench is used to tighten the vertical shaft nut to lock the drum assembly and the vertical shaft; when disassembling the vertical shaft nut, first use the vertical shaft nut wrench to loosen the vertical shaft nut, and then take out the vertical shaft nut from the inside of the drum (there is an M6 threaded hole in the middle of the vertical shaft nut, and there is an M6 screw on the vertical shaft nut puller). When separating ordinary materials, this structure has no problems. However, when separating materials in industries such as food and medicine, it is usually necessary to perform a full-range on-line cleaning inside the drum. The cleaning standard requires that there is no residue in the internal area of the drum. Usually, riboflavin detection is used. Through multiple detections, there is material residue in the threaded hole above the vertical shaft nut, resulting in a cleaning dead angle and not meeting the sanitary requirements. This limits the application of the separator in industries such as food and medicine, and also affects the high-end development trend of the separator.

[0003] In view of the above, it is necessary to propose a vertical shaft nut and a disassembly and assembly tool for a sanitary disc separator to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a vertical shaft nut and a disassembly and assembly tool for a sanitary disc separator.

[0005] To achieve the above object, the technical solution of the present invention is as follows: A vertical shaft nut for a disc separator, comprising a stud portion, and a nut portion is formed at the upper end of the stud portion. The nut portion has a polygonal prism structure, so that ribs and side faces are formed on the side faces of the nut portion, and a groove structure is recessed in at least one side face.

[0006] Further, a convex ring portion with an enlarged diameter is provided between the stud portion and the nut portion, so that steps are formed between the two sides of the convex ring portion and the stud portion and the nut portion. The convex ring portion is matched with a countersunk hole. A ring groove is provided in the circumferential direction of the convex ring portion, and an O-ring is arranged in the ring groove.

[0007] Further, the groove structure forms a sunk groove structure with a large outer opening and a small inner opening. The groove structures are provided on all side faces in the axial direction of the nut portion.

[0008] Further, the outer opening of the groove structure is circular, and the inner opening forms a conical tip, so that the groove structure forms a conical groove.

[0009] Further, a centering projection structure matched with a disassembly and assembly tool is also provided on the top of the nut portion; the centering projection structure includes a central column and a side positioning portion. The central column is a vertical rod vertically fixed at the center position of the upper end face of the nut portion. A side positioning portion is provided on the upper end face of the nut portion and on the side of the central column. The side positioning portion is provided as a structure protruding upward on the upper end face of the nut portion.

[0010] Further, the side positioning portion is a columnar projection structure arranged parallel to the central column and kept at a certain distance from it. The columnar projection structure includes a prism or a cylinder.

[0011] Further, the side positioning portion is a radial boss arranged radially on the upper end face of the nut portion. The cross section of the radial boss is fan-shaped or rectangular, and one side of the radial boss is integrally connected to the central column.

[0012] Further, the height of the side positioning portion is not less than the height of the nut portion, and the height of the central column is greater than the height of the side positioning portion.

[0013] A disassembly and assembly tool for a vertical shaft nut of a disc separator, comprising a stud sleeve sleeved with the aforementioned stud portion. The stud sleeve is arranged at the lower end of a central rod, and a cross bar serving as a driving handle is vertically provided at one end of the upper end of the central rod extending out of the disc separator; an elastic piece is provided on the stud sleeve. The upper end of the elastic piece is a fixed end, and a pin rod is provided at the lower end of the elastic piece. A through hole for the pin rod to pass through is provided on the stud sleeve, and the position where the through hole is opened corresponds to the height position of the groove structure.

[0014] Further, an alignment groove structure matching with the alignment convex structure is arranged inside the stud sleeve. The alignment groove structure includes a central groove matching with the central column and side grooves matching with the side positioning parts.

[0015] The advantages and beneficial effects of the present utility model are as follows: The vertical shaft nut of the sanitary disc separator of the present utility model is an improved design of the structure of the existing vertical shaft nut. The threaded hole at the top thereof is removed, so that materials will not remain in the threaded hole, and thus no cleaning dead angle will be formed at this place. A clamping groove structure for fixing the vertical shaft nut and the disassembly and assembly tool is arranged on the side of the stud part, which is convenient for taking out the loosened column nut from the drum body; the conical groove-shaped clamping groove structure arranged on the side will not form a cleaning dead angle, so that there is no residue in the separator body, meeting the sanitary requirements. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the vertical shaft nut and the disassembly and assembly tool of the sanitary disc separator of the present utility model;

[0017] Figure 2 is one of the schematic diagrams of the vertical shaft nut in the present utility model;

[0018] Figure 3 is another schematic diagram of the vertical shaft nut in the present utility model;

[0019] Figure 4 is still another schematic diagram of the vertical shaft nut in the present utility model;

[0020] Figure 5 is a schematic diagram of the disassembly and assembly tool of the disc separator in the present utility model;

[0021] Figure 6 is in the present utility model Figure 1 an enlarged schematic diagram of part A therein;

[0022] Figure 7 is a schematic diagram of the vertical shaft nut and the disassembly and assembly tool in Embodiment 3 of the present utility model;

[0023] Figure 8 is a schematic longitudinal sectional view of the disc separator;

[0024] Figure 9 is a schematic diagram of the vertical shaft nut in the prior art;

[0025] Figure 10 is a disassembly tool for the vertical shaft nut in the prior art;

[0026] In the figure: 1, pump chamber cover; 2, distributor; 3, drum body; 4, tapered hole; 5, vertical shaft rod; 6, vertical shaft cone; 7, vertical shaft nut; 8, piston; 9, vertical shaft nut wrench; 10, vertical shaft nut puller; 11, threaded hole; 12, screw rod; 13, stud part; 14, nut part; 15, ridge; 16, side part; 17, slot structure; 18, convex ring part; 19, step; 20, ring groove; 21, O-ring; 22, conical groove; 23, alignment protrusion structure; 24, center column; 25, side positioning part; 26, columnar protrusion; 27, radial boss; 28, stud sleeve; 29, center rod; 30, cross bar; 31, elastic sheet; 32, pin rod; 33, through hole; 34, alignment groove structure; 35, center groove; 36, side groove. DETAILED DESCRIPTION

[0027] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] The original vertical shaft nut structure is as follows Figure 9 As shown, the improved vertical shaft nut 7 has a structure as shown in Figures 2 - 4 As shown, the threaded hole 11 on the upper part of the vertical shaft nut 7 is removed to prevent the material from remaining in the threaded hole 11; the original vertical shaft nut 7 has no problem when separating ordinary materials, but when separating materials in the food, medicine and other industries, due to the high requirements of the hygiene level of the raw materials, it is usually necessary to perform all-round online cleaning on the inside of the drum. The cleaning standard requires that there is no residue in the internal area of ​​the drum. Riboflavin detection is usually used. After multiple tests, such as Figure 9 As shown, there is material residue in the threaded hole 11 above the original vertical shaft nut 7, and there is a dead corner for cleaning, which does not meet the sanitary requirements. This limits the application of the separator in the food, medicine and other industries, and also affects the high-end development trend of the separator.

[0029] Embodiment 1:

[0030] A disc separator vertical shaft nut 7 includes a stud portion 13. The vertical shaft nut 7 in this embodiment has a general structure similar to the original structure. A nut portion 14 is formed at the upper end of the stud portion 13. The nut portion 14 is a polygonal prism structure. The nut portion 14 can be in the form of a hexagonal prism nut, such as Figure 2 As shown, the nut portion 14 is formed with an edge portion 15 and a side portion 16, and a sleeve with a matching end portion of a special tool can be sleeved on the nut portion 14 to install and remove the vertical shaft nut 7;

[0031] In this embodiment, a slot structure 17 is formed on the side surface 16. Figure 2As shown, in some embodiments, the nut portion 14 is provided with a groove structure 17 on each side surface 16 in the axial direction. In this embodiment, six groove structures 17 are correspondingly provided on the six side surfaces 16; in other embodiments, such as Figure 3 , 4 shown, if the groove structure 17 is provided on any one side surface 16, then the groove structure 17 is provided only on one side surface 16; in this embodiment, the original threaded hole 11 located at the top is removed and replaced with the groove structure 17 opened on the side. On the one hand, it can achieve cleaning without dead angles, and on the other hand, it can cooperate with the disassembly and assembly integrated tool of the vertical shaft nut 7 to conveniently install and disassemble the vertical shaft nut 7, and it will not fall during the disassembly and removal process.

[0032] The structure of the vertical shaft nut 7 in this embodiment is as Figure 2 , 6 shown. Specifically, a convex ring portion 18 with an enlarged diameter is provided between the stud portion 13 and the nut portion 14, so that steps 19 are formed on both sides of the convex ring portion 18 with the stud portion 13 and the nut portion 14. A counterbore is provided at the top of the tapered hole 4 inside the disc separator. The convex ring portion 18 is matched with the counterbore. When the vertical shaft nut 7 is installed in place, the convex ring portion 18 can sink into the counterbore so that a limit is formed between the lower step 19 and the counterbore, and the upper step 19 is flush with the upper edge of the counterbore; a ring groove 20 is provided in the circumferential direction of the convex ring portion 18, and an O-ring 21 is arranged in the ring groove 20. As Figure 6 shown, when the vertical shaft nut 7 is installed in place, the O-ring 21 fills the space between the ring groove 20 and the counterbore to form a seal for the disc separator.

[0033] Furthermore, the groove structure 17 forms a sunk groove structure with a large outer opening and a small inner opening. As shown in the cross-sectional view in Figure 2 , the large outer opening and small inner opening of the groove structure 17 can facilitate thorough cleaning, and the inner wall is a smooth surface without threads, thereby avoiding the residue of impurities and making cleaning easier; the slope surface formed between the outer opening and the inner opening can make the impurities remaining inside flow away along the slope surface during the flushing process. Preferably, the outer opening of the groove structure 17 is circular and the inner opening forms a conical tip, so that the groove structure 17 forms a conical groove 22; compared with the pyramid-shaped groove structure 17 with edges, the conical groove has the advantage of no side edges, so the inner wall is smoother, and since there are no edges, no edge dead angles will be formed. In this embodiment, the top of the nut portion 14 forms a frustum-shaped structure.

[0034] Embodiment Two:

[0035] Corresponding to the vertical shaft nut 7 designed in Embodiment One, in this embodiment, the existing disassembly tool for the vertical shaft nut 7 is improved. The existing disassembly tool is of a split design, such as Figure 10As shown, it is specifically divided into a wrench for the vertical shaft nut 7 and a puller for the vertical shaft nut 7. The usage methods of both are described in the background art and will not be elaborated here. In this embodiment, a disassembly and assembly tool for the vertical shaft nut 7 of a disc separator combines the functions of the existing two tools and is used in conjunction with the vertical shaft nut 7 in the first embodiment. Specifically, as Figure 5 , 6 shown, this tool includes a stud sleeve 28 sleeved with the stud portion 13 described in the first embodiment. The stud sleeve 28 is arranged at the lower end of the central rod 29. One end of the upper end of the central rod 29 extending out of the disc separator is vertically provided with a cross bar 30 serving as a driving handle. An elastic piece 31 is provided on the stud sleeve 28. The upper end of the elastic piece 31 is a fixed end, and a pin rod 32 is provided at the lower end of the elastic piece 31. A through hole 33 for the pin rod 32 to pass through is provided on the stud sleeve 28, and the position where the through hole 33 is opened corresponds to the height position of the card slot structure 17. When in use, insert the stud sleeve 28 end of this tool downward along the center line of the disc separator and make the stud sleeve 28 sleeved on the nut portion 14. The vertical shaft nut 7 has a step 19 on the upper side, so the lower end of the stud sleeve 28 can be stuck on this step 19 to form a limit, thereby enabling the height position of the through hole 33 to be determined. It can be understood that when the stud sleeve 28 is stuck on the nut portion 14, the through hole 33 can align with a card slot structure 17, as Figure 6 shown. And a pin rod 32 is passed through the through hole 33, and the pin rod 32 is installed on the elastic piece 31, so that the pin rod 32 has a certain contraction elasticity. When the through hole 33 aligns with the card slot structure 17, the pin rod 32 is stuck into the card slot structure 17 under the action of the elastic piece 31, forming the fastening of the disassembly and assembly tool and the vertical shaft nut 7. Rotate the central rod 29 by using the cross bar 30 to screw off the vertical shaft nut 7. Lift this tool upward, and with the cooperation of the pin rod 32 being stuck into the card slot structure 17, the vertical shaft nut 7 can be directly taken out.

[0036] Specifically, as Figure 5 shown, for the improved disassembly and assembly tool for the vertical shaft nut 7, the elastic piece 31 can be made of the elastic material 65Mn. The elastic piece 31 is fixed on the central rod 29 by two upper and lower rivets. The pin rod 32 is a tapered pin, which is fixed to the elastic piece 31 through a tapered surface. The lower part of the elastic piece 31 can freely elastically deform. When the square head rod is inserted into the card slot structure 17, the pin rod 32 just gets stuck in the tapered hole, ensuring that the vertical shaft nut 7 will not fall off. And the elastic piece 31 elastically deforms outward under the action of the pin rod 32, as Figure 6 shown, so that its elastic force acts on the vertical shaft nut 7 through the pin rod 32. The disassembly and assembly process is as follows: as Figure 1As shown in the figure, during installation, the vertical shaft nut 7 is clamped at the end of the disassembly and assembly tool, and the vertical shaft nut 7 is placed inside the drum, and then the vertical shaft nut 7 is tightened; during disassembly, the disassembly and assembly tool for the vertical shaft nut 7 is inserted into the drum, the vertical shaft nut 7 is loosened, and then the vertical shaft nut 7 is directly taken out from the inside of the drum.

[0037] After adopting this technical solution, during the cleaning of the separator, riboflavin detection is used, and there is no residue inside the separator, meeting the sanitary requirements; in addition, the efficiency of disassembling and assembling the vertical shaft nut 7 is increased by more than 50%.

[0038] Embodiment Three:

[0039] In the foregoing embodiments, in order to enable the special disassembly and assembly integrated tool to exactly fit into the slot structure 17 each time when disassembling the vertical shaft nut 7, a slot structure 17 is provided on each side surface 16. However, during use, only one slot structure 17 is actually used. Therefore, the problem is that the more slots are set, the more locations need to be paid attention to during cleaning. Although the slot structure 17 is easier to clean than the threaded hole 11, with the increase in the number, the cleaning is time-consuming and laborious, and most of the slot structures 17 will not be used.

[0040] As an improvement, as Figure 2 、 3 shown, in this embodiment, a slot structure 17 is only opened on one side surface 16 of the nut portion 14, and the other side surfaces 16 are still flat. Therefore, only one slot structure 17 needs to be paid attention to for cleaning. The problem that needs to be noted is that the pin 32 on the disassembly and assembly tool can exactly fit on the side surface 16 provided with the slot structure 17.

[0041] Specifically, a centering convex structure 23 that cooperates with the disassembly and assembly tool is further provided on the top of the nut portion 14. This centering convex structure 23 plays a role in guiding the pin 32 onto the side surface with the slot structure 17 and has an anti-fooling function; in this embodiment, the centering convex structure 23 includes a central column 24 and a side positioning portion 25. The central column 24 is a vertical rod vertically fixed at the center position of the upper end surface of the nut portion 14. A side positioning portion 25 is provided on the upper end surface of the nut portion 14 and on the side of the central column 24. The side positioning portion 25 is set as a structure that protrudes upward on the upper end surface of the nut portion 14. As Figure 3 shown, a columnar side positioning portion 25 is provided on one side of the central column 24 in this embodiment. Specifically, the side positioning portion 25 is a columnar protrusion 26 structure that is parallel to the central column 24 and is spaced apart from it. The columnar protrusion 26 structure includes a prism or a cylinder; the side positioning portion 25 shown in the figure takes a cylinder as an example, and the height of the central column 24 is greater than the height of the side positioning portion 25, and the height of the side positioning portion 25 is not less than the height of the nut portion 14.

[0042] As an improvement, correspondingly, a centering groove structure 34 that matches the centering convex structure 23 is provided inside the stud sleeve 28. The centering groove structure 34 includes a central groove 35 that matches the central column 24 and a side groove 36 that matches the side positioning portion 25. Specifically, the central groove 35 is a central groove 35 that is recessed upward from the center of the inner top surface of the stud sleeve 28. As Figure 3 shown, since the central column 24 is higher than the columnar protrusion 26, when the stud sleeve 28 is buckled on the vertical shaft nut 7, the central column 24 first snaps into the central groove 35. At this time, the top of the columnar protrusion 26 is fixed on the inner top of the stud sleeve 28 to limit it. During use, only by rotating the stud sleeve 28 to align the side groove 36 with the columnar protrusion 26 and inserting it can the stud sleeve 28 continue to be sleeved downward on the nut portion 14. Since the height of the side positioning portion 25 is not less than the height of the nut portion 14, when the columnar protrusion 26 is fixed on the inner top of the stud sleeve, the stud sleeve 28 can rotate around the central column 24 and align the side groove 36 with the columnar protrusion 26. After alignment and snapping in, the pin rod 32 is aligned with the card slot structure 17.

[0043] Embodiment 4:

[0044] As a further improvement to Embodiment 3, the side positioning portion 25 is a radial boss 27 provided radially on the upper end surface of the nut portion 14. The cross-section of the radial boss 27 is fan-shaped or rectangular, and one side of the radial boss 27 is integrally connected to the central column 24. As Figure 4 、 7 shown, since the columnar protrusion 26 has a certain height and is relatively thin, there is a chance of bending it after long-term use. Therefore, the structure of this embodiment is strengthened. Specifically, the occupied area of the side positioning portion 25 is increased and it is connected to the central column 24 together, thereby reducing the cleaning dead angle. The central column 24 is higher than the radial boss 27. During installation, it is still the central column 24 that first inserts into the central groove 35 for centering, and then rotates the position to align the side groove 36 with the radial boss 27, and then it can continue to be inserted downward so that the stud sleeve 28 is sleeved on the nut portion 14 and the pin rod 32 is kept opposite to the card slot structure 17.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A sanitary disc separator vertical shaft nut, comprising a stud portion (13), characterized in that: A nut portion (14) is formed at the upper end of the stud portion (13), the nut portion (14) being in the form of a polygonal prism, with an edge portion (15) and a side portion (16) formed on the side of the nut portion (14), and a slot structure (17) being formed inwardly on at least one side portion (16).

2. A sanitary disc separator vertical shaft nut according to claim 1, characterized in that: A convex ring portion (18) with an enlarged diameter is provided between the stud portion (13) and the nut portion (14), so that steps (19) are formed between the two sides of the convex ring portion (18) and the stud portion (13) and the nut portion (14), the convex ring portion (18) is matched with the countersunk hole, and a ring groove (20) is provided in the circumference of the convex ring portion (18), and an O-type sealing ring (21) is provided in the ring groove (20).

3. A sanitary disc separator vertical shaft nut according to claim 2, characterized in that: The clamping groove structure (17) forms a sink structure with a large outer opening and a small inner opening.

4. A sanitary disc separator vertical shaft nut according to claim 3, characterized in that: The outer opening of the slot structure (17) is circular, and the inner opening is conical, so that the slot structure (17) forms a conical groove (22).

5. The vertical shaft nut of a sanitary disc separator according to claim 1, characterized in that: The top of the nut portion (14) is also provided with an alignment protrusion structure (23) that cooperates with the disassembly tool; the alignment protrusion structure (23) comprises a center column (24) and a side positioning portion (25); the center column (24) is a vertical rod vertically fixed at the center position of the upper end surface of the nut portion (14); the side positioning portion (25) is provided on the upper end surface of the nut portion (14) and on the side of the center column (24); the side positioning portion (25) is configured as a structure protruding upward on the upper end surface of the nut portion (14).

6. A sanitary disc separator vertical shaft nut according to claim 5, characterized in that: The side positioning portion (25) is a columnar protrusion (26) structure arranged parallel to the central column (24) and at a certain distance therefrom, and the columnar protrusion (26) comprises a prism or a cylinder.

7. The vertical shaft nut of a sanitary disc separator according to claim 5, characterized in that: The side positioning portion (25) is a radial boss (27) radially arranged on the upper end surface of the nut portion (14); the cross section of the radial boss (27) is fan-shaped or rectangular; one side of the radial boss (27) is integrally connected to the center column (24).

8. The vertical shaft nut of a sanitary disc separator according to claim 5, characterized in that: The height of the side positioning portion (25) is not less than the height of the nut portion (14), and the height of the central column (24) is greater than the height of the side positioning portion (25).

9. A tool for disassembling and assembling the vertical shaft nut of a sanitary disc separator, characterized in that: It comprises a stud sleeve (28) which fits with the stud portion (13) according to any one of claims 1 to 8, wherein the stud sleeve (28) is arranged at the lower end of a center rod (29), and a cross rod (30) serving as a driving handle is vertically arranged at one end of the upper end of the center rod (29) extending outside the butterfly separator; an elastic sheet (31) is arranged on the stud sleeve (28), the upper end of the elastic sheet (31) is a fixed end, and a pin rod (32) is arranged at the lower end of the elastic sheet (31); a through hole (33) is arranged on the stud sleeve (28) for the pin rod (32) to pass through, and the opening position of the through hole (33) corresponds to the height position of the slot structure (17).

10. A tool for disassembling and assembling a vertical shaft nut of a sanitary disc separator according to claim 9, characterized in that: An alignment groove structure (34) matching with the alignment protrusion structure (23) is provided inside the stud sleeve (28), and the alignment groove structure (34) comprises a central groove (35) matching with the central column (24), and a side groove (36) matching with the side positioning portion (25).

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