Double-shaft sealing sand mill
By adopting a dual-axis seal design in the sand mill and using two external mechanical seals for double sealing, the wear and leakage of existing sand mill seals is solved, achieving higher sealing effect and continuity of UV coating production.
Patent Information
- Application Number
- CN202421105190.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing sand mill keeps the seal through a mechanical seal, causing the seal to wear and leak, affecting the grinding quality of UV paint, and requires frequent shutdown to replace the seal, interfering with the production arrangement of UV paint.
A double-shaft sealing sand mill is designed, and the middle sand mill shaft is double-sealed by two external mechanical seals to ensure that even if one seal is damaged, the other seal can remain sealed and avoid shutdown and replacement.
Improve the sealing effect, avoid interference from UV coating production arrangements, ensure normal grinding and production of UV coatings, and will not slow down the production progress.
Smart Images
Figure CN222658806U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand mills, in particular to a double-shaft sealed sand mill. Background Art
[0002] In the production of UV coatings, a sand grinder is used to grind the UV coating. The rotating shaft inside the grinder is sealed by a mechanical seal, and the mechanical seal needs to be replaced regularly to ensure the sealing effect.
[0003] The existing grinder maintains internal and external seals through a mechanical seal on the rotating shaft. The mechanical seal will gradually wear and leak. During the production grinding process, if a mechanical seal leaks during production, it will directly affect the grinding quality of the UV coating. Therefore, it is necessary to immediately stop the machine and replace the mechanical seal, which will cause certain interference to the production arrangement of the UV coating and slow down the production progress of the UV coating. Summary of the invention
[0004] The disclosed embodiment relates to a double-shaft sealed sand mill, in which the middle sand mill shaft performs double sealing operation through two external mechanical seals to improve the sealing effect. When one of the external mechanical seals is damaged, the other external mechanical seal can also maintain a sealed state, and grinding production can still be carried out, avoiding interference with the production arrangement of UV coatings and not delaying the production progress of UV coatings.
[0005] In a first aspect of the present disclosure, a double-axis sealed sand mill is provided, which specifically includes: a main frame, a driving frame, an external mechanical seal and a middle sand mill shaft, wherein the driving frame is arranged on the rear side of the main frame, an external mechanical seal is fixed on the middle part of the main frame, a middle sand mill shaft is rotatably arranged on the front side of the main frame, a lower base is fixed on the lower part of the main frame, an external sand mill cylinder is horizontally slidably arranged on the front part of the lower base, a rear slide rail frame is fixed on the rear part of the lower base, and the tail opening of the external sand mill cylinder is sealed and fitted with the main frame.
[0006] In at least some embodiments, a driving motor is fixed on the top of the driving frame, a main shaft of the driving motor and a driving shaft are fixedly connected, and the driving shaft is connected to a spline shaft through a driving belt and keeps synchronous rotation.
[0007] In at least some embodiments, the drive shaft and the spline shaft are both rotatably connected to the drive frame, the drive frame and the rear slide rail frame are slidably connected, and the spline shaft moves and separates from the middle sanding shaft, so that the spline shaft will not hinder the disassembly and replacement of the external mechanical seal.
[0008] In at least some embodiments, an inner dynamic seal rotates inside the outer mechanical seal, and the inner dynamic seal and the outer mechanical seal are also provided with multiple rubber sealing rings. The outer mechanical seal is fixedly connected and sealed to the main frame, and the inner dynamic seal is fixedly connected and sealed to the middle sanding shaft.
[0009] In at least some embodiments, external mechanical seals are fixed on both the front and rear sides of the main frame, and internal dynamic seals are symmetrically fixed at the head end of the middle sanding shaft. The middle sanding shaft performs double sealing operation through two external mechanical seals and an internal dynamic seal. When one external mechanical seal is damaged, the other external mechanical seal can also maintain sealing.
[0010] In at least some embodiments, the middle sanding shaft tail end is surrounded and fixed with internal spiral teeth, the middle sanding shaft tail end is fixedly connected with an outer tube, the outer tube is fixed with external spiral teeth, and the middle sanding shaft tail section is fixed with rod pins in an annular array.
[0011] In at least some embodiments, the outer tube is located on the outside of the inner spiral teeth, the tail end of the rod pin penetrates to the outside of the outer tube, the inner spiral teeth and the outer spiral teeth are arranged in opposite directions, the inner spiral teeth and the outer spiral teeth drive the UV coating inside and outside the outer tube to flow in both directions, and the rod pin performs a double grinding operation on the bidirectional flow of the UV coating inside and outside the outer tube.
[0012] The utility model provides a double-shaft sealed sand mill, which has the following beneficial effects:
[0013] The middle sand grinding shaft performs double sealing operation through two external mechanical seals to improve the sealing effect. When one of the external mechanical seals is damaged, the other external mechanical seal can also maintain the sealing state, and the grinding production can still be carried out, avoiding certain interference with the production arrangement of UV coatings and not slowing down the production progress of UV coatings.
[0014] The inner spiral teeth and the outer spiral teeth drive the UV coating inside and outside the outer pipe to flow in two directions, and perform double grinding operation on the UV coating inside and outside the outer pipe to improve the grinding efficiency of the UV coating and shorten the grinding time of the UV coating. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.
[0016] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.
[0017] In the attached picture:
[0018] Figure 1 A schematic diagram showing the overall structure of the present application;
[0019] Figure 2 A schematic diagram showing the main frame structure of the present application is shown;
[0020] Figure 3 A schematic diagram showing the structure of the outer mechanical seal of the present application is shown;
[0021] Figure 4 A schematic diagram showing the structure of the sanding shaft of the present application is shown;
[0022] Figure 5 A schematic structural diagram of a cross section of an outer sanding barrel of the present application is shown;
[0023] Figure 6 A schematic structural diagram showing the spline shaft and the middle sanding shaft of the present application in a separated state;
[0024] Reference numerals list
[0025] 1. Main frame; 101. External sanding cylinder; 102. Rear slide rail frame; 103. Lower base;
[0026] 2. Driving frame; 201. Driving motor; 202. Driving shaft; 203. Driving belt; 204. Spline shaft;
[0027] 3. External mechanical seal; 301. Internal dynamic seal;
[0028] 4. Middle sanding shaft; 401. Internal spiral teeth; 402. External pipe fitting; 403. External spiral teeth; 404. Rod pin. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Example 1: Please refer to Figures 1 to 6 :
[0031] The utility model proposes a double-shaft sealed sand mill, comprising: a main frame 1, a driving frame 2, an outer mechanical seal 3 and a middle sand mill shaft 4, a lower base 103 is fixed at the lower part of the main frame 1, an outer sand mill cylinder 101 is horizontally slidably arranged at the front of the lower base 103, a rear slide rail frame 102 is fixed at the rear of the lower base 103, a tail opening of the outer sand mill cylinder 101 is sealed with the main frame 1, a driving frame 2 is arranged at the rear side of the main frame 1, a driving motor 201 is fixed at the top of the driving frame 2, a main shaft of the driving motor 201 and a driving shaft 202 are fixedly connected, the driving shaft 202 is connected to a spline shaft 204 through a driving belt 203 and keeps synchronous rotation, the driving shaft 202 and the spline shaft 204 are both rotatably connected to the driving frame 2, the driving frame 2 and the rear slide rail frame 102 are slidably connected, the spline shaft 204 moves and separates from the middle sand mill shaft 4, so that the spline shaft 204 will not hinder the disassembly and replacement of the outer mechanical seal 3;
[0032] External mechanical seals 3 are fixed on both sides of the middle of the main frame 1, an internal dynamic seal 301 is rotated inside the external mechanical seal 3, the internal dynamic seal 301 and the external mechanical seal 3 are also provided with multiple rubber sealing rings, the external mechanical seal 3 and the main frame 1 are fixedly connected and sealed, the internal dynamic seal 301 and the middle sanding shaft 4 are fixedly and sealedly connected, the middle sanding shaft 4 is rotated on the front side of the main frame 1, the outer side of the tail end of the middle sanding shaft 4 is surrounded and fixed with internal spiral teeth 401, the outer side of the tail end of the middle sanding shaft 4 is fixedly connected with an outer pipe fitting 402, the outer side of the outer pipe fitting 402 is fixed with external spiral teeth 403, and a rod pin 404 is fixed in a ring array at the tail section of the middle sanding shaft 4.
[0033] In the disclosed embodiment, external mechanical seals 3 are fixed on the front and rear sides of the main frame 1, and internal dynamic seals 301 are symmetrically fixed at the head end of the middle sand mill shaft 4. The middle sand mill shaft 4 performs double sealing operation through the two external mechanical seals 3 and the internal dynamic seal 301 to improve the sealing effect. The two external mechanical seals 3 and the internal dynamic seal 301 are redundant to ensure that when one external mechanical seal 3 is damaged, the other external mechanical seal 3 can also maintain sealing. The middle sand mill shaft 4 remains in a sealed state, and there is no need to immediately shut down the equipment for replacement, thereby ensuring that the UV coating continues to be ground and produced.
[0034] In the disclosed embodiment, the outer tube 402 is located on the outside of the inner spiral teeth 401, and the tail end of the rod pin 404 passes through the outside of the outer tube 402. The spiral directions of the inner spiral teeth 401 and the outer spiral teeth 403 are opposite. The inner spiral teeth 401 and the outer spiral teeth 403 drive the UV coating inside and outside the outer tube 402 to flow in both directions. The rod pin 404 causes the UV coating inside and outside the outer tube 402 to flow in both directions for double grinding, thereby accelerating the grinding efficiency of the UV coating.
[0035] Embodiment 2, on the basis of embodiment 1, the middle sand mill shaft 4 and the section where the inner spiral teeth 401 at the tail end of the middle sand mill shaft 4 are located can be a separate structure, the section where the inner spiral teeth 401 at the tail end of the middle sand mill shaft 4 are located and the middle sand mill shaft 4 are slidingly combined and rotate synchronously, and the disassembly of the section where the inner spiral teeth 401 at the tail end of the middle sand mill shaft 4 are located facilitates the disassembly and replacement operations of the external mechanical seal 3 and the internal dynamic seal 301.
[0036] The working principle of this embodiment is as follows: the outer sanding cylinder 101 and the main frame 1 are fitted and sealed, the middle sanding shaft 4, the inner spiral teeth 401, the outer pipe 402, the outer spiral teeth 403, and the rod pin 404 are all inside the outer sanding cylinder 101, and the outer sanding cylinder 101 is provided with a liquid inlet and a liquid outlet. The UV coating to be ground is poured into the outer sanding cylinder 101, and the driving motor 201 is started to drive the driving shaft 202 to rotate, and the driving shaft 202 drives the spline shaft 204 to rotate synchronously through the driving belt 203, and the spline shaft 204 and the middle sanding shaft 4 rotate synchronously, and the middle sanding shaft 4 and the inner spiral teeth 401 and the outer spiral teeth 403 and the outer pipe 402 rotate synchronously. The rotation of the inner spiral teeth 401 drives the UV coating inside the outer tube 402 to move toward the main frame 1. The gap between the outer tube 402 and the main frame 1 guides the UV coating inside the main frame 1 to the outside. The UV coating enters the outer spiral teeth 403 outside the outer tube 402. The outer spiral teeth 403 drive the UV coating to flow toward the side away from the main frame 1. The inner spiral teeth 401 and the outer spiral teeth 403 drive the UV coating inside and outside the outer tube 402 to flow in both directions. The rod pin 404 performs a double grinding operation on the UV coating inside and outside the outer tube 402 by making the two-way flow, thereby improving the grinding efficiency of the UV coating and shortening the grinding time of the UV coating.
[0037] The main frame 1 is provided with two outer mechanical seals 3 and an inner dynamic seal 301 to seal the middle sand mill shaft 4. The sealing components between the outer mechanical seal 3 and the inner dynamic seal 301 are sealed. The sealing effect is maintained by regularly replacing the outer mechanical seal 3 and the inner dynamic seal 301. The middle sand mill shaft 4 performs double sealing operation through the two outer mechanical seals 3 and the inner dynamic seal 301 to improve the sealing effect. When one of the outer mechanical seals 3 is damaged, the other outer mechanical seal 3 can also maintain sealing. The middle sand mill shaft 4 remains in a sealed state, and the equipment does not need to be immediately shut down for replacement, thereby ensuring the normal grinding production of UV coating. The grinding production of UV coating can still be carried out, avoiding interference with the production arrangement of UV coating, and will not slow down the production progress of UV coating. The driving frame 2 moves away from the main frame 1 along the rear slide rail frame 102, and the spline shaft 204 moves synchronously with the driving frame 2. The spline shaft 204 is synchronously separated from the middle sand mill shaft 4, so that the spline shaft 204 does not hinder the replacement of the outer mechanical seal 3.
[0038] In this article, there are a few points to note:
[0039] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.
[0040] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.
[0041] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A double-shaft sealed sand mill, comprising: A main frame (1), a driving frame (2), an external mechanical seal (3) and a middle sanding shaft (4); characterized in that a driving frame (2) is arranged on the rear side of the main frame (1), an external mechanical seal (3) is fixed in the middle of the main frame (1), a middle sanding shaft (4) is rotatably arranged on the front side of the main frame (1), an inner spiral tooth (401) is fixed around the outer side of the tail end of the middle sanding shaft (4), an outer pipe (402) is fixedly connected to the outer side of the tail end of the middle sanding shaft (4), an outer spiral tooth (403) is fixed on the outer side of the outer pipe (402), and a rod pin (404) is fixed to the tail section array of the middle sanding shaft (4).
2. A double-shaft sealed sand mill according to claim 1, characterized in that: A lower base (103) is fixed at the lower part of the main frame (1), an outer sanding cylinder (101) is horizontally slidable at the front of the lower base (103), a rear slide rail frame (102) is fixed at the rear of the lower base (103), and the rear opening of the outer sanding cylinder (101) is tightly sealed to the main frame (1).
3. A double-shaft sealed sand mill according to claim 1, characterized in that: A driving motor (201) is fixed on the top of the driving frame (2); the main shaft of the driving motor (201) and the driving shaft (202) are fixedly connected; the driving shaft (202) is connected to a spline shaft (204) via a driving belt (203) and keeps synchronous rotation.
4. A double-shaft sealed sand mill according to claim 3, characterized in that: The driving shaft (202) and the spline shaft (204) are both rotatably connected to the driving frame (2), and the driving frame (2) and the rear slide rail frame (102) are slidably connected.
5. A double-shaft sealed sand mill according to claim 1, characterized in that: An inner dynamic seal (301) is rotatably disposed inside the outer mechanical seal (3); the outer mechanical seal (3) is fixedly connected to the main frame (1); and the inner dynamic seal (301) is fixedly connected to the middle sanding shaft (4).
6. A double-shaft sealed sand mill according to claim 5, characterized in that: External mechanical seals (3) are fixed to both the front and rear sides of the main frame (1), and internal dynamic seals (301) are fixed to the head end of the middle sanding shaft (4) at intervals and symmetrically.
7. A double-shaft sealed sand mill according to claim 1, characterized in that: The outer tube (402) is located outside the inner helical teeth (401), the tail end of the rod pin (404) penetrates to the outside of the outer tube (402), and the inner helical teeth (401) and the outer helical teeth (403) are arranged in opposite directions.