High pressure dry mill split seal structure

Abstract

The utility model relates to high pressure dry grinder technical field discloses high pressure dry grinder split formula machine seal structure, including machine seal shell, the outer wall top of machine seal shell is fixedly connected with support plate, the middle part rotationally connected with two -way screw rod of support plate, the outer wall equidistance screw thread connection of two -way screw rod has a plurality of moving plate, the bottom of moving plate all is fixedly connected with semicircle block, the outer wall left and right sides of support plate all are fixedly connected with inner slide block plate, the top of machine seal shell is equipped with the protection mechanism, the protection mechanism is used for covering the joint gap of machine seal shell and is protected. In the utility model, when two semicircle blocks move to the center, the split of machine seal shell is clamped evenly from the outside, thereby avoiding the problem that the nylon ring will be worn with the increase of use time, the matching precision between the nylon ring and the screw is reduced, and the effect of automatic locking is affected.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure dry grinding mill technology, and in particular to a split mechanical seal structure for high-pressure dry grinding mills. Background Technology

[0002] A high-pressure dry grinding mill is a mechanical device used for dry grinding of materials. It operates in a high-pressure environment and consists of a grinding chamber, grinding media, a drive unit, a feeding and discharging system, and a pressure control system. The split mechanical seal structure of a high-pressure dry grinding mill is a mechanical seal device used in high-pressure dry grinding mills. It mainly consists of split dynamic rings, stationary rings, springs, and sealing rings. By designing the dynamic and stationary rings to be detachable, it is easy to install, maintain, and replace the sealing elements without disassembling the large components of the mill's main shaft.

[0003] The existing split mechanical seal structure of high-pressure dry grinding mills connects the bushing to the main shaft via a set screw in the set screw hole. The split rotating ring is fixed to the bushing by a set screw passing through the rotating ring set screw hole. However, high-pressure dry grinding mills generate vibration and impact during operation, which causes the set screw to gradually loosen. Once the set screw loosens, the connection between the bushing and the main shaft, and between the rotating ring and the bushing, becomes unstable, thus affecting the sealing effect of the mechanical seal structure. Existing technology improves upon ordinary set screws by machining special structures on the threads, such as adding nylon rings, to enable automatic locking under external force and prevent loosening. However, during mill operation, the set screw is subject to friction and wear, and the nylon ring wears down over time, reducing the fit accuracy between it and the thread, thus affecting the automatic locking effect. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a split mechanical seal structure for high-pressure dry grinding mills, which aims to improve the problem in the prior art where the nylon ring wears down with the increase of usage time, resulting in a decrease in the fit accuracy between the nylon ring and the thread, and thus affecting the automatic locking effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a split mechanical seal structure for a high-pressure dry grinding mill, comprising a mechanical seal shell, a support plate fixedly connected to the top of the outer wall of the mechanical seal shell, a bidirectional threaded rod rotatably connected to the middle of the support plate, a plurality of movable plates equidistantly threaded to the outer wall of the bidirectional threaded rod, a semi-circular block fixedly connected to the bottom of each movable plate, an inner sliding block fixedly connected to the left and right sides of the outer wall of the support plate, and a protective mechanism installed on the top of the mechanical seal shell, the protective mechanism being used to cover and protect the gaps at the joints of the mechanical seal shell.

[0006] As a further description of the above technical solution:

[0007] The protective mechanism includes a telescopic cylinder, which is installed on the top of the machine seal housing. A spring coil is fixedly connected to the top of the telescopic cylinder and installed at the bottom of the telescopic cylinder. A long short plate is fixedly connected to the front side of the top, and a spring pull rod is installed on the outer wall of the long short plate. A fixed short column is rotatably connected to the front side of the top. Multiple positioning holes are equidistantly opened around the outer wall of the fixed short column. A pull rope is fixedly connected to the outer wall of the fixed short column, and the other end of the pull rope is fixedly connected to the front side of the outer wall of the telescopic cylinder.

[0008] As a further description of the above technical solution:

[0009] A sealing ring is fixedly connected to the front side of the outer wall of the machine seal housing.

[0010] As a further description of the above technical solution:

[0011] A warning sign is fixedly connected to the left side of the outer wall of the telescopic cylinder.

[0012] As a further description of the above technical solution:

[0013] A clamp is installed on the rear side of the outer wall of the telescopic cylinder.

[0014] As a further description of the above technical solution:

[0015] A throttle is fixedly connected to the right end of the outer wall of the bidirectional threaded rod.

[0016] As a further description of the above technical solution:

[0017] A protective sleeve is fixedly connected to the outer wall of the throttle.

[0018] As a further description of the above technical solution:

[0019] The outer rear end of the spring rod is threaded with a bolt, and the outer wall of the bolt is threaded with an anti-slip sleeve.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by rotating the bidirectional threaded rod, multiple moving plates are driven to move in opposite directions. The semi-circular blocks at the bottom of the moving plates move accordingly and approach the split connection of the machine seal. When the two semi-circular blocks move towards the center, they clamp the split of the machine seal evenly from the outside, thereby avoiding the problem that the nylon ring will wear down with the increase of the usage time, which will reduce the fit accuracy between it and the thread and thus affect the automatic locking effect.

[0022] 2. In this utility model, by pulling the spring rod, the positioning pin is disengaged from the positioning hole. Rotating the fixed short column begins to tighten the pull rope, and the telescopic cylinder is pulled. The spring coil at the bottom of the telescopic cylinder provides assistance during the stretching process, allowing the telescopic cylinder to unfold smoothly and cover the connection of the machine seal, forming a protective barrier to prevent impurities from entering. After the telescopic cylinder is fully unfolded, the spring rod is released and re-inserted into the positioning hole of the fixed short column to lock the fixed short column, thereby achieving the function of covering and protecting the gap at the connection of the seal. Attached Figure Description

[0023] Figure 1 This is a front view of the split mechanical seal structure for a high-pressure dry mill proposed in this utility model;

[0024] Figure 2 This is a perspective view of the split mechanical seal structure of the high-pressure dry grinding mill proposed in this utility model;

[0025] Figure 3 This is a partial structural breakdown diagram of the split mechanical seal structure for the high-pressure dry mill proposed in this utility model;

[0026] Figure 4 This is a side view of the split mechanical seal structure for a high-pressure dry grinding mill proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the protective mechanism of the split mechanical seal structure for a high-pressure dry mill proposed in this utility model;

[0028] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0029] Legend:

[0030] 1. Seal housing; 2. Protective mechanism; 201. Telescopic cylinder; 202. Spring coil; 203. Support plate; 204. Fixed short column; 205. Pull rope; 206. Positioning hole; 207. Long short plate; 208. Spring pull rod; 3. Semi-circular block; 4. Protective sleeve; 5. Turn handle; 6. Inner sliding plate; 7. Two-way threaded rod; 8. Sealing ring; 9. Clamp; 10. Support plate; 11. Anti-slip sleeve; 12. Moving plate; 13. Warning sign; 14. Bolt. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a split mechanical seal structure for a high-pressure dry grinding mill, including a mechanical seal shell 1. A support plate 10 is fixedly connected to the top of the outer wall of the mechanical seal shell 1. A bidirectional threaded rod 7 is rotatably connected to the middle of the support plate 10. Multiple movable plates 12 are equidistantly threaded to the outer wall of the bidirectional threaded rod 7. A semi-circular block 3 is fixedly connected to the bottom of each movable plate 12. Inner sliding plates 6 are fixedly connected to the left and right sides of the outer wall of the support plate 10. A protective mechanism 2 is installed on the top of the mechanical seal shell 1. The protective mechanism 2 is used to cover and protect the gaps at the joints of the mechanical seal shell 1. A sealing ring 8 is fixedly connected to the front side of the outer wall of the mechanical seal shell 1. The sealing ring 8 can enhance the sealing performance of the joints of the mechanical seal shell 1. A warning sign 13 is fixedly connected to the left side of the outer wall of the telescopic cylinder 201. The warning sign 13 can remind the staff of the precautions when using and operating the equipment, thereby reducing the probability of accidents.

[0033] Specifically, by rotating the bidirectional threaded rod 7, multiple movable plates 12 on the outer wall move in opposite directions on the bidirectional threaded rod 7. The movement of the movable plates 12 is constrained and guided by the inner sliding plate 6. The inner sliding plate 6 cooperates with the movable plates 12 to ensure that the movable plates 12 can only slide smoothly in the left and right directions. The semi-circular block 3 fixedly connected to the bottom of the movable plate 12 will gradually approach the split connection of the machine seal 1 as the movable plate 12 moves. Finally, when the two semi-circular blocks 3 move towards the center at the same time, they will evenly clamp the split connection of the machine seal 1 from the outside, and firmly fix the various parts of the machine seal 1 together, preventing the connection of the machine seal 1 from loosening or displacement due to vibration and impact. A sealing ring 8 is fixedly connected to the front side of the outer wall of the machine seal 1. The sealing ring 8 can enhance the sealing performance of the connection of the machine seal 1. A warning sign 13 is fixedly connected to the left side of the outer wall of the telescopic cylinder 201. The warning sign 13 can remind the staff of the precautions when using and operating the equipment, thereby reducing the probability of accidents.

[0034] Reference Figure 4 , Figure 5 and Figure 6The protective mechanism 2 includes a telescopic cylinder 201, which is installed on the top of the machine seal housing 1. A 203 is fixedly connected to the top of the telescopic cylinder 201, and a spring coil 202 is installed at the bottom of the telescopic cylinder 201. A long short plate 207 is fixedly connected to the front top of the 203. A spring pull rod 208 is installed on the outer wall of the long short plate 207. A fixed short column 204 is rotatably connected to the front top of the 203. Multiple positioning holes 206 are equidistantly opened around the outer wall of the fixed short column 204. A pull rope 205 is fixedly connected to the outer wall of the fixed short column 204. The other end of the pull rope 205 is fixedly connected to the front outer wall of the telescopic cylinder 201. A clamp 9 is installed on the rear outer wall of the telescopic cylinder 201. The clamp 9 facilitates the removal and installation of the protective mechanism 2 by the operator. A handle 5 is fixedly connected to the right end of the outer wall of the bidirectional threaded rod 7. The handle 5 facilitates the operator to rotate the bidirectional threaded rod 7 for use.

[0035] Specifically, by pulling the spring rod 208, the positioning pin is separated from the positioning hole 206. Then, the fixed short column 204 is rotated and the pull rope 205 is tightened. Since the other end of the pull rope 205 is fixed to the front side of the outer wall of the telescopic cylinder 201, the telescopic cylinder 201 is pulled as the pull rope 205 tightens. During the stretching process, the spring coil 202 at the bottom of the telescopic cylinder 201 uses the tension generated by its own elastic deformation to assist the telescopic cylinder 201 to rise smoothly and cover the connection of the machine seal 1, forming a protective barrier to prevent impurities from entering. After the telescopic cylinder 201 is fully extended and the protection is completed, the pulled spring rod 208 is released and re-inserted into the positioning hole 206 of the fixed short column 204 to lock the fixed short column 204. A clamp 9 is installed on the rear side of the outer wall of the telescopic cylinder 201. The clamp 9 facilitates the removal and installation of the protective mechanism 2 by the operator. A handle 5 is fixedly connected to the right end of the outer wall of the bidirectional threaded rod 7. The handle 5 facilitates the operator to rotate the bidirectional threaded rod 7 for use.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the throttle 5 is fixedly connected to a protective sleeve 4. The protective sleeve 4 can protect the throttle 5 from damage after long-term use. The outer rear end of the spring pull rod 208 is threadedly connected to a bolt 14. The outer wall of the bolt 14 is threadedly connected to an anti-slip sleeve 11. The anti-slip sleeve 11 can prevent the operator from slipping when holding the spring pull rod 208.

[0037] Specifically, a protective sleeve 4 is fixedly connected to the outer wall of the throttle 5. The protective sleeve 4 can protect the throttle 5 from damage after long-term use. A bolt 14 is threadedly connected to the rear end of the outer wall of the spring pull rod 208. An anti-slip sleeve 11 is threadedly connected to the outer wall of the bolt 14. The anti-slip sleeve 11 can prevent the operator from slipping when holding the spring pull rod 208.

[0038] Working principle: By rotating the bidirectional threaded rod 7, multiple movable plates 12 on the outer wall move in opposite directions on the bidirectional threaded rod 7. The movement of the movable plates 12 is constrained and guided by the inner sliding plate 6. The inner sliding plate 6 cooperates with the movable plates 12 to ensure that the movable plates 12 can only slide smoothly in the left and right directions. The semi-circular block 3 fixedly connected to the bottom of the movable plate 12 will gradually approach the split connection of the machine seal 1 as the movable plate 12 moves. Finally, when the two semi-circular blocks 3 move towards the center at the same time, they will clamp the split connection of the machine seal 1 from the outside and fix the various parts of the machine seal 1 together firmly. This prevents the connection of the machine seal 1 from loosening or displacement due to vibration and impact. This avoids the problem that the nylon ring will wear down with the increase of use time, which will reduce the fit accuracy between it and the thread and affect the automatic locking effect.

[0039] Pulling the spring lever 208 separates the positioning pin from the positioning hole 206. Then, rotating the fixed short column 204 tightens the pull rope 205. Since the other end of the pull rope 205 is fixed to the front side of the outer wall of the telescopic cylinder 201, the telescopic cylinder 201 is pulled as the pull rope 205 tightens. During the stretching process, the spring coil 202 at the bottom of the telescopic cylinder 201 uses the tension generated by its own elastic deformation to assist the telescopic cylinder 201 to rise smoothly and cover the connection of the machine seal 1, forming a protective barrier to prevent impurities from entering. After the telescopic cylinder 201 is fully extended and completes the protection, the pulled spring lever 208 is released and re-inserted into the positioning hole 206 of the fixed short column 204 to lock the fixed short column 204, thereby achieving the function of covering and protecting the gap at the connection of the machine seal 1.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split mechanical seal structure for a high-pressure dry grinding mill, comprising a mechanical seal housing (1), characterized in that: A support plate (10) is fixedly connected to the top of the outer wall of the machine seal (1). A bidirectional threaded rod (7) is rotatably connected to the middle of the support plate (10). Multiple movable plates (12) are equidistantly threaded to the outer wall of the bidirectional threaded rod (7). A semi-circular block (3) is fixedly connected to the bottom of each movable plate (12). An inner sliding block (6) is fixedly connected to the left and right sides of the outer wall of the support plate (10). A protective mechanism (2) is installed on the top of the machine seal (1). The protective mechanism (2) is used to cover and protect the gaps at the joints of the machine seal (1).

2. The split mechanical seal structure for a high-pressure dry mill according to claim 1, characterized in that: The protective mechanism (2) includes a telescopic cylinder (201), which is installed on the top of the machine seal housing (1). The top of the telescopic cylinder (201) is fixedly connected to (203), and the bottom of the telescopic cylinder (201) is equipped with a spring coil (202). The front top of the (203) is fixedly connected to a long short plate (207), and the outer wall of the long short plate (207) is equipped with a spring pull rod (208). The front top of the (203) is rotatably connected to a fixed short column (204). The outer wall of the fixed short column (204) is provided with multiple positioning holes (206) at equal intervals. The outer wall of the fixed short column (204) is fixedly connected to a pull rope (205), and the other end of the pull rope (205) is fixedly connected to the front outer wall of the telescopic cylinder (201).

3. The split mechanical seal structure for a high-pressure dry mill according to claim 1, characterized in that: A sealing ring (8) is fixedly connected to the front side of the outer wall of the machine casing (1).

4. The split mechanical seal structure for a high-pressure dry grinding mill according to claim 2, characterized in that: A warning sign (13) is fixedly connected to the left side of the outer wall of the telescopic cylinder (201).

5. The split mechanical seal structure for a high-pressure dry mill according to claim 2, characterized in that: A clamp (9) is installed on the rear side of the outer wall of the telescopic cylinder (201).

6. The split mechanical seal structure for a high-pressure dry mill according to claim 1, characterized in that: A throttle (5) is fixedly connected to the right end of the outer wall of the bidirectional threaded rod (7).

7. The split mechanical seal structure for a high-pressure dry mill according to claim 6, characterized in that: The outer wall of the throttle (5) is fixedly connected to a protective sleeve (4).

8. The split mechanical seal structure for a high-pressure dry grinding mill according to claim 2, characterized in that: The outer rear end of the spring rod (208) is threaded with a bolt (14), and the outer wall of the bolt (14) is threaded with an anti-slip sleeve (11).

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