A disc separator feed pipe anti-loosening device

Abstract

The present invention discloses a feed pipe anti-loosening device for a disc-type separator, wherein the feed pipe passes through a lower through hole and an upper through hole; at least a plurality of axial protrusions are provided at the corresponding position of the feed pipe and the lower through hole, and the axial protrusions are arranged along the length direction of the feed pipe and are evenly distributed on the outer wall of the feed pipe; an axial limiting groove corresponding to the axial protrusion is formed on the inner wall of the lower through hole, so that the axial protrusion is inserted into the axial limiting groove along the axial direction, so that the feed pipe and the joint seat are circumferentially fixed. The present invention optimizes and improves the feed pipe and the joint seat of the disc-type separator, invents a feed pipe mechanism for preventing loosening, improves the structure of the middle part of the feed pipe, the cross section of which is designed to be similar to a triangle, and an arc-shaped notch is designed at the corresponding position on the joint seat. During assembly, the triangular shape of the feed pipe is just stuck in the notch, and the feed pipe and the joint seat cannot rotate relative to each other, thereby preventing the feed pipe from rotating under the impact force of the fluid.

Description

Technical Field

[0001] The invention relates to the technical field of separation machinery, and in particular to a disc separator feed pipe anti-loosening device. Background Art

[0002] The disc separator is a high-speed sedimentation centrifuge. It uses the strong centrifugal force generated by high-speed rotation to quickly separate "liquid-solid" and "liquid-liquid-solid" mixtures. Due to its efficient separation and high degree of automation, it can realize fully automatic operation from feeding, separation, slag discharge and other steps. It is widely used in industries such as shipping, food, medicine, chemical industry, textile and environmental protection. The drum is one of the most important parts of the disc separator. The solid-liquid separation process of the material is carried out inside the drum. The drum is usually composed of drum cover, drum body, piston, main lock ring, disc, distributor, vertical shaft nut and other parts. The material enters the separator from the feed pipe, which is fixed on the casing; the separated clear liquid is transported out by the centripetal pump, which is also fixed on the casing. The high-speed rotating liquid enters the flow channel inside the centripetal pump and is then transported out.

[0003] from Figure 1 It can be seen that the centripetal pump is supported and pressed against the casing by the feed pipe. The upper part of the feed pipe has threads, and the locking nut fixes the feed pipe to the casing through the threads. The outer circle of the feed pipe and the inner hole of the joint seat are clearance-matched, thus forming a material passage that is connected to the discharge pipe upward. When the high-speed rotating liquid enters the centripetal pump, it always generates fluid impact force on the centripetal pump (this impact force forms a rotational torque on the feed pipe). Especially when the feed fluctuates, this impact will be more serious. Under the long-term impact, the rotation of the feed pipe will cause the locking nut to loosen. Once loosened, the feed pipe and the centripetal pump will drop in position, and rub against high-speed rotating parts such as the distributor joint, resulting in equipment failure. In severe cases, the feed pipe will break, affecting on-site production efficiency. According to on-site statistics, the feed pipe of the separator is prone to loosening after 6 months of use.

[0004] In view of the above, it is necessary to propose a disc separator feed pipe anti-loosening device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a disc separator feed pipe anti-loosening device.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a disc separator feed pipe anti-loosening device, comprising a drum body, a drum cover, a disc group, a joint seat, a feed pipe, and a centripetal pump, wherein the feed pipe passes through the joint seat and enters the distributor, and the discharge end of the centripetal pump is upwardly connected to the discharge pipe of the joint seat through the circumferential gap between the feed pipe and the joint seat, and the upper end of the feed pipe passes through the upper end surface of the joint seat and is fastened with a locking nut; the joint seat comprises a lower through hole, an upper through hole, and a discharge pipe; the lower through hole The hole is arranged on the lower side of the discharge pipe, the upper through hole is arranged on the upper side of the discharge pipe, and the feed pipe is arranged through the lower through hole and the upper through hole; at least a plurality of axial protrusions are arranged at the corresponding position of the feed pipe and the lower through hole, and the axial protrusions are arranged along the length direction of the feed pipe and are evenly distributed on the outer wall of the feed pipe; an axial limiting groove corresponding to the axial protrusion is formed on the inner wall of the lower through hole, so that the axial protrusion is inserted into the axial limiting groove along the axial direction, so that the feed pipe and the joint seat are circumferentially fixed.

[0007] Furthermore, the axial protrusion is a side wing plate extending radially in a rectangular shape; the axial limit groove is formed by a depression on the inner wall surface of the lower through hole, or a pair of protrusions are formed on the inner wall surface of the lower through hole to form a stop bar, and an axial limit groove is formed between the two stop bars.

[0008] Furthermore, the cross section of the feed pipe is in the shape of a rounded triangle, and the three corners of the rounded triangle extend axially to form an axial protrusion.

[0009] Furthermore, the axis limiting groove is an arc-shaped groove arranged axially on the inner wall of the lower through hole, and three arc-shaped grooves are arranged along the circumferential direction, and the rounded edges of the axial protrusions are inserted into the arc-shaped grooves.

[0010] Furthermore, a nut anti-loosening mechanism is provided on the upper end surface of the joint seat, the upper part of the locking nut is a prism portion, the lower side of the prism portion is provided with an outer ring ratchet portion, and the nut anti-loosening mechanism includes an inner ring ratchet portion, and the inner ring ratchet portion is provided with an arc-shaped inner wall that fits with the outer ring ratchet portion on one side close to the locking nut, and the arc-shaped inner wall is provided with a ratchet structure.

[0011] Furthermore, the inner ring pawl portion is movably connected to the upper end surface of the joint seat, and the inner ring pawl portion is controlled by a control mechanism to move closer to or away from the locking nut. When the inner ring pawl portion is in contact with the locking nut, it locks the locking nut in one direction.

[0012] Furthermore, the inner ring ratchet portion is rotatably connected and arranged on the joint seat, and a first vertical shaft is provided on the upper end surface of the joint seat. One end of the inner ring ratchet portion is rotatably connected to the first vertical shaft, and the control mechanism controls the other end of the inner ring ratchet portion to rotate around the first vertical shaft within a certain angle range, thereby controlling the ratchet structure to approach or move away from the outer ring ratchet portion.

[0013] Furthermore, the control mechanism includes an elbow mechanism and a driving member, the elbow mechanism includes two connecting rods hinged to each other, the hinged ends of the two connecting rods are elbows, one end of the elbow mechanism is hinged to the second vertical shaft on the joint seat, and the other end is hinged to the inner ring ratchet portion, the free end of the driving member is hinged to the elbow and drives the elbow mechanism to transform between a V shape and a straight shape.

[0014] Furthermore, when the two connecting rods in the toggle mechanism are collinear, the two connecting rods are located at dead point positions.

[0015] The advantages and beneficial effects of the present invention are as follows: the present invention optimizes and improves the feed pipe and the joint seat of the disc separator, invents a feed pipe mechanism that prevents loosening, improves the structure of the middle part of the feed pipe, the cross section of which is designed to be a triangle-like shape, and an arc-shaped notch is designed at the corresponding position on the joint seat. During assembly, the triangular shape of the feed pipe is just stuck in the notch, and the feed pipe and the joint seat cannot rotate relative to each other, thereby preventing the feed pipe from rotating under the impact force of the fluid. The loosening problem can be effectively solved. After adopting this technical solution, through on-site operation, after 18 months of continuous operation, the separator feed pipe did not have a loosening failure, and the equipment reliability was improved by more than 3 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of a disc separator of the present invention; Figure 2 is a schematic longitudinal section diagram of the connector base in the present invention; Figure 3 is a schematic cross-sectional view of a feed pipe in the present invention; Figure 4 The present invention Figure 3 The first schematic diagram of the AA section; Figure 5 This is a schematic diagram of the feed pipe being installed in the lower through hole in the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the feed pipe being installed in the lower through hole in the present invention. Figure 2 ; Figure 7 The present invention Figure 3 The second schematic diagram of the AA section; Figure 8 This is a schematic diagram of the feed pipe being installed in the lower through hole in the present invention. Figure 3 ; Fig. 9 It is an isometric view of the nut anti-loosening mechanism at the top of the joint seat in the present invention; Fig.10 It is an exploded view of the nut anti-loosening mechanism at the top of the joint seat in the present invention; Fig.11It is a schematic diagram of the structural change of the nut anti-loosening mechanism in the present invention; In the figure: 1. drum body; 2. drum cover; 3. disc assembly; 4. joint seat; 5. feed pipe; 6. centripetal pump; 7. distributor; 8. circumferential gap; 9. discharge pipe; 10. locking nut; 11. lower through hole; 12. upper through hole; 13. axial protrusion; 14. axial limit groove; 15. side wing plate; 16. baffle; 17. rounded triangle; 18. arc-shaped groove; 19. rounded edge; 20. nut anti-loosening mechanism; 21. prism; 22. outer ring ratchet portion; 23. inner ring ratchet portion; 24. arc-shaped inner wall; 25. ratchet structure; 26. control mechanism; 27. first vertical axis; 28. elbow mechanism; 29. ​​driving member; 30. connecting rod; 31. elbow; 32. second vertical axis. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below 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.

[0018] Embodiment 1: A disc separator feed pipe anti-loosening device, such as Figure 1 As shown, it includes a drum body 1, a drum cover 2, a disc group 3, a joint seat 4, a feed pipe 5, and a centripetal pump 6. The feed pipe 5 passes through the joint seat 4 and enters the distributor 7. The discharge end of the centripetal pump 6 is upwardly connected to the discharge pipe 9 of the joint seat 4 through the circumferential gap 8 between the feed pipe 5 and the joint seat 4. The upper end of the feed pipe 5 passes through the upper end surface of the joint seat 4 and is fastened with a locking nut 10. Figure 1 It can be seen that the centripetal pump 6 is supported and pressed against the casing by the feed pipe 5, the upper part of the feed pipe 5 is threaded, and the locking nut 10 fixes the feed pipe 5 to the casing through the thread. The outer circle of the feed pipe 5 and the inner hole of the joint seat 4 are clearance matched, and the clearance match is the circumferential gap 8, so that the material of the centripetal pump 6 passes through the circumferential gap 8 into the discharge pipe 9.

[0019] Specific; such as Figure 2 As shown, the joint seat 4 includes a lower through hole 11, an upper through hole 12, and a discharge pipe 9; the lower through hole 11 is arranged at the lower side of the discharge pipe 9, the upper through hole 12 is arranged at the upper side of the discharge pipe 9, the feed pipe 5 passes through the lower through hole 11 and the upper through hole 12, and the feed pipe 5 is sealed at the upper through hole 12; in this embodiment, four axial protrusions 13 are provided at the corresponding positions of the feed pipe 5 and the lower through hole 11, and the axial protrusions 13 are arranged along the length direction of the feed pipe 5 and are evenly distributed on the outer wall of the feed pipe 5; specifically, as Figure 3 , 4 As shown, the axial protrusion 13 is a side wing plate 15 extending in a radial direction in a rectangular shape.

[0020] An axial limiting groove 14 corresponding to the axial protrusion 13 is formed on the inner wall of the lower through hole 11, so that the axial protrusion 13 is inserted into the axial limiting groove 14 along the axial direction, so that the feed pipe 5 and the joint seat 4 are fixed circumferentially. As an embodiment, Figure 5 As shown, the axial limiting groove 14 is formed by being recessed on the inner wall surface of the lower through hole 11. As another embodiment, Figure 6 As shown, or a pair of stop bars 16 are formed on the inner wall surface of the lower through hole 11, and an axis limiting groove is formed between the two stop bars 16. The two embodiments are similar, both adopt the same axial protrusion 13 structure design, the difference is that the setting structure of the axis limiting groove on the inner wall of the lower through hole 11 is different.

[0021] Embodiment 2: In the first embodiment, a side wing plate 15 extending radially in a rectangular shape is designed. Although it has the function of limiting rotation, the rotation speed of the drum body 1 is relatively high, so that the outlet pump pressure generated by the centripetal pump 6 is relatively large. If the flow fluctuates, the side wing plate 15 may still be deformed or damaged under a large rotational stress; in order to strengthen the structure.

[0022] Specifically, Figure 7 As shown, the cross section of the feed pipe 5 is in the shape of a rounded triangle 17, and the three corners of the rounded triangle 17 extend axially to form an axial protrusion 13. The root of the triangular axial protrusion 13 forms a widened connection with the feed pipe 5, thereby forming an effective reinforcement to avoid deformation and damage under high pressure. Figure 8 As shown, the axis limit groove is an arc groove 18 axially arranged on the inner wall of the lower through hole 11, and three arc grooves 18 are circumferentially arranged, and the rounded edge 19 of the axial protrusion 13 is inserted into the arc groove 18; when installing, the joint seat 4 is sleeved on the feed pipe 5 from top to bottom, and the three arc grooves 18 are aligned with the positions of the rounded edges 19. After installation, the rotation of the feed pipe 5 can be limited to avoid loosening of the locking nut 10.

[0023] Embodiment three: In the aforementioned embodiments, the problem of loosening of the locking nut 10 is solved by limiting the rotation of the feed pipe 5. The loosening of the locking nut 10 can be improved by preventing the feed pipe 5 from rotating. However, the vibration generated when the separator rotates can be directly transferred to the locking nut 10 through the joint seat 4. Therefore, after running for a period of time, the locking nut 10 is still at risk of loosening.

[0024] As an improvement, Figure 9-11As shown, the upper end surface of the joint seat 4 is provided with a nut anti-loosening mechanism 20, the upper part of the locking nut 10 is a prism part 21, and the lower side of the prism part 21 is provided with an outer ring ratchet part 22, as shown in FIG. Fig.10 As shown, during installation, a wrench can be used to clamp the prism portion 21. In this embodiment, a hexagonal prism structure can be used. The locking nut 10 can be tightened using a wrench, so that the feed pipe 5 is installed in place. The nut anti-loosening mechanism 20 includes an inner ring ratchet portion 23. In this embodiment, an outer ring ratchet portion 22 is provided at the lower part of the locking nut 10, which is combined with the inner ring ratchet portion 23 to form a ratchet structure. In the initial stage of installation, the outer ring ratchet portion 22 is separated from the locking nut 10. When the bottom surface of the locking nut 10 is in contact with the upper end surface of the joint seat 4, the inner ring ratchet portion 23 is then in contact with the outer ring ratchet portion 22. The inner ring ratchet portion 23 is provided with an arc-shaped inner wall 24 that is in contact with the outer ring ratchet portion 22 on the side close to the locking nut 10. The arc-shaped inner wall 24 is provided with a pawl structure 25; the teeth of the pawl structure 25 are pushed up to one side of the outer ring ratchet portion 22 by the elastic member, and the inner ring ratchet portion 23 is fitted on the locking nut 10 to lock it in one direction. Specifically, when the locking nut 10 is tightened, the pawl structure 25 will not block until the locking nut 10 is tightened; during normal operation, since the pawl structure 25 is stuck in the outer ring ratchet portion 22, the locking nut 10 can be fixed to prevent the locking nut 10 from rotating in the opposite direction, thereby preventing the locking nut 10 from loosening.

[0025] In order to facilitate the removal of the locking nut 10 during maintenance, etc., a structure for unlocking the pawl structure 25 and the outer ring ratchet portion 22 can be further provided. Specifically, the inner ring pawl portion 23 is movably connected and arranged on the upper end surface of the joint seat 4, and the control mechanism 26 controls the inner ring pawl portion 23 to move closer to or away from the locking nut 10. When unlocking is required, the inner ring pawl portion 23 is controlled to leave the locking nut 10. At this time, the pawl structure 25 is disengaged from the outer ring ratchet portion 22, and the locking nut 10 can be removed using a wrench.

[0026] Specifically, Fig.10 As shown, the inner ring pawl portion 23 is rotatably connected to the joint seat 4, and the upper end surface of the joint seat 4 is provided with a first vertical shaft 27. One end of the inner ring pawl portion 23 is rotatably connected to the first vertical shaft 27. The control mechanism 26 controls the other end of the inner ring pawl portion 23 to rotate around the first vertical shaft 27 within a certain angle range, and controls the pawl structure 25 to approach or move away from the outer ring ratchet portion 22. Fig.11 As shown in a, the inner ring pawl portion 23 fits on the outer ring ratchet portion 22 to achieve one-way locking; when the locking nut 10 needs to be removed, as shown in Fig.11 As shown in FIG. 2 b, the inner ring pawl portion 23 is rotated around the first vertical shaft 27, so that the inner pawl structure 25 is separated from the ratchet portion, and the locking nut 10 can be easily disassembled.

[0027] Further, the inner ring ratchet portion 23 is controlled to rotate by a control mechanism 26, the control mechanism 26 includes a toggle mechanism 28 and a driving member 29, the toggle mechanism 28 includes two connecting rods 30 hinged to each other, the hinged ends of the two connecting rods 30 are elbows 31, one end of the toggle mechanism 28 is hinged to a second vertical shaft 32 on the joint seat 4, and the other end is hinged to the inner ring ratchet portion 23, the free end of the driving member 29 is hinged to the elbow 31 and drives the toggle mechanism 28 to change between a V-shape and a straight shape; Fig.11 As shown in the figure, the change from a to b is the change from a straight line to a V-shape, so that the inner ring pawl portion 23 can be pulled apart to achieve unlocking. When the two connecting rods 30 in the toggle mechanism 28 are collinear, the two connecting rods 30 are located at the dead point position, such as Fig.11 As shown in a, the drive member 29 pushes the elbow 31 upward, so that the two connecting rods 30 are collinear to form a dead point, thereby providing good support for the inner circle pawl portion 23 and preventing the inner circle pawl portion 23 from loosening and retreating at this end.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A disc separator feed pipe anti-loosening device, comprising a drum body (1), a drum cover (2), a disc group (3), a joint seat (4), a feed pipe (5), and a centripetal pump (6), wherein the feed pipe (5) passes through the joint seat (4) and enters a distributor (7), and the discharge end of the centripetal pump (6) is upwardly connected to the discharge pipe (9) of the joint seat (4) through a circumferential gap (8) between the feed pipe (5) and the joint seat (4), and the upper end of the feed pipe (5) passes through the upper end surface of the joint seat (4) and is fastened using a locking nut (10); characterized in that: The joint seat (4) comprises a lower through hole (11), an upper through hole (12), and a discharge pipe (9); the lower through hole (11) is arranged at the lower side of the discharge pipe (9), the upper through hole (12) is arranged at the upper side of the discharge pipe (9), and the feed pipe (5) is arranged through the lower through hole (11) and the upper through hole (12); a plurality of axial protrusions (13) are provided at least at the corresponding positions of the feed pipe (5) and the lower through hole (11); the axial protrusions (13) are arranged along the length direction of the feed pipe (5) and are evenly distributed on the outer wall of the feed pipe (5); an axial limiting groove (14) corresponding to the axial protrusion (13) is formed on the inner wall of the lower through hole (11), so that the axial protrusion (13) is inserted into the axial limiting groove (14) along the axial direction, so that the feed pipe (5) and the joint seat (4) are circumferentially fixed.

2. The anti-loosening device for the feed pipe of a disc separator according to claim 1, characterized in that: The axial protrusion (13) is a side wing plate (15) extending in a radial direction in a rectangular shape; the axial limiting groove (14) is formed by a depression on the inner wall surface of the lower through hole (11), or a pair of protrusions are formed on the inner wall surface of the lower through hole (11) to form a stop bar (16), and an axial limiting groove is formed between the two stop bars (16).

3. The anti-loosening device for the feed pipe of a disc separator according to claim 1, characterized in that: The cross section of the feed pipe (5) is in the shape of a rounded triangle (17), and the three corners of the rounded triangle (17) extend axially to form an axial protrusion (13).

4. The anti-loosening device for feeding pipe of a disc separator according to claim 3, characterized in that: The axis limiting groove is an arc-shaped groove (18) arranged along the axial direction on the inner wall of the lower through hole (11), and three arc-shaped grooves (18) are arranged along the circumferential direction. The rounded edge (19) of the axial protrusion (13) is inserted into the arc-shaped groove (18).

5. The anti-loosening device for feeding pipe of disc separator according to claim 1, characterized in that: The upper end surface of the joint seat (4) is provided with a nut anti-loosening mechanism (20); the upper portion of the locking nut (10) is a prism portion (21); the lower side of the prism portion (21) is provided with an outer ring ratchet portion (22); the nut anti-loosening mechanism (20) includes an inner ring ratchet portion (23); a side of the inner ring ratchet portion (23) close to the locking nut (10) is provided with an arc-shaped inner wall (24) that fits with the outer ring ratchet portion (22); and the arc-shaped inner wall (24) is provided with a ratchet structure (25).

6. The anti-loosening device for the feed pipe of a disc separator according to claim 5, characterized in that: The inner ring pawl portion (23) is movably connected to the upper end surface of the joint seat (4), and the inner ring pawl portion (23) is controlled by a control mechanism (26) to move closer to or away from the locking nut (10). When the inner ring pawl portion (23) is in contact with the locking nut (10), it locks the locking nut (10) in one direction.

7. The anti-loosening device for the feed pipe of a disc separator according to claim 6, characterized in that: The inner ring ratchet portion (23) is rotatably connected to the joint seat (4); a first vertical shaft (27) is provided on the upper end surface of the joint seat (4); one end of the inner ring ratchet portion (23) is rotatably connected to the first vertical shaft (27); a control mechanism (26) controls the other end of the inner ring ratchet portion (23) to rotate around the first vertical shaft (27) within a certain angle range, and controls the ratchet structure (25) to approach or move away from the outer ring ratchet portion (22).

8. The anti-loosening device for feeding pipe of disc separator according to claim 7, characterized in that: The control mechanism (26) comprises a toggle mechanism (28) and a driving member (29). The toggle mechanism (28) comprises two connecting rods (30) hinged to each other. The hinged ends of the two connecting rods (30) are elbows (31). One end of the toggle mechanism (28) is hinged to a second vertical shaft (32) on the joint seat (4), and the other end is hinged to an inner ring ratchet portion (23). The free end of the driving member (29) is hinged to the elbow (31) and drives the toggle mechanism (28) to change between a V-shape and a straight shape.

9. The anti-loosening device for the feed pipe of a disc separator according to claim 8, characterized in that: When the two connecting rods (30) in the toggle mechanism (28) are collinear, the two connecting rods (30) are located at dead point positions.

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