Split dry mechanical seal connecting structure for extrusion granulation

Abstract

The split type dry mechanical seal connecting structure comprises a first split part and a second split part, the first split part and the second split part are spliced to form a ring body arranged outside a shaft body in a sleeving mode, a positioning assembly and a tensioning assembly are arranged between the first split part and the second split part, and the first split part and the second split part are spliced to form a ring body arranged outside the shaft body in a sleeving mode. The tensioning assembly is used for fixing and tensioning the first split part and the second split part, and the positioning assembly is used for positioning the first split part and the second split part. The split dry mechanical seal has the effect of conveniently positioning the two split surfaces of the split dry mechanical seal.

Description

Technical Field

[0001] The present application relates to the field of shaft sealing equipment technology, and in particular to a split dry mechanical sealing connection structure for extrusion granulation. Background Art

[0002] Extrusion granulator is an important equipment widely used in chemical, pharmaceutical, food and other industries. Its working principle is to make materials into granular products by extrusion, cutting, etc. Extrusion granulator has the advantages of high product quality, high production efficiency, strong adaptability and easy operation.

[0003] The shaft seal of the extrusion granulator generally adopts the split dry mechanical seal, which is a common technology for rotating shaft sealing. It has two split surfaces and can be installed and replaced multiple times without disassembling the equipment. It can effectively prevent material leakage and ensure safety and environmental protection in the production process.

[0004] The two split surfaces of a split dry mechanical seal are disassembled and assembled many times. During installation, the two split surfaces need to be strictly aligned to ensure the airtightness of the shaft seal. However, the current connection structure does not make it easy to position the two split surfaces. Summary of the invention

[0005] In order to facilitate the positioning of two split surfaces of a split dry mechanical seal, the present application provides a split dry mechanical seal connection structure for extrusion granulation.

[0006] The present application provides a split dry mechanical seal connection structure for extrusion granulation using the following technical solution:

[0007] A split dry mechanical seal connection structure for extrusion granulation includes a first split part and a second split part, wherein the first split part and the second split part are spliced ​​into a ring body sleeved outside a shaft, and a positioning component and a tensioning component are arranged between the first split part and the second split part, wherein the tensioning component is used to fix and tighten the first split part and the second split part, and the positioning component is used to position the first split part and the second split part.

[0008] Optionally, the positioning assembly includes a positioning pin, a first positioning groove is formed at one side end of the first split portion, a second positioning groove is formed at a position of the second split portion corresponding to the first positioning groove, and one end of the positioning pin is adapted to the first positioning groove and the other end is adapted to the second positioning groove.

[0009] Optionally, the inner diameter of the first positioning groove is larger than the inner diameter of the second positioning groove.

[0010] Optionally, both ends of the locating pin are chamfered.

[0011] Optionally, the positioning pin is threadedly connected to the side wall of the second positioning groove.

[0012] Optionally, the tensioning assembly includes a connecting screw, the positioning pin is provided with a through hole for the connecting screw to pass through, the second split portion is provided with a slot for the connecting screw to pass through, the end of the connecting screw is threadedly inserted into the first split portion, and the connecting screw thread passes through the positioning pin.

[0013] Optionally, two positioning components and a tensioning component are arranged side by side at one end of the first split portion and the second split portion.

[0014] Optionally, two positioning components and tensioning components are also provided at the other side ends of the first subdivided portion and the second subdivided portion, and the positioning components and tensioning components at both ends are arranged to support each other along the center of the axis of the rotating shaft.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. By setting a positioning component between the first split part and the second split part, the first split part and the second split part are aligned by the positioning component before being fixed, thereby improving the problem that the two split surfaces of the split dry mechanical seal are difficult to align during multiple disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0019] Figure 3 It is a side view of an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1. First subdivided portion; 11. First positioning groove; 2. Second subdivided portion; 21. Second positioning groove; 22. Slot; 3. Positioning assembly; 31. Positioning pin; 32. Through hole; 4. Tensioning assembly; 41. Connecting screw. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-3 This application is described in further detail.

[0023] The present application embodiment discloses a split dry mechanical seal connection structure for extrusion granulation, referring to Figure 1 and Figure 2A split dry mechanical seal connection structure for extrusion granulation includes a first split part 1 and a second split part 2. The first split part 1 and the second split part 2 are two semi-annular structures, and the first split part 1 and the second split part 2 can be spliced ​​into a ring body sleeved outside the shaft, that is, the first split part 1 and the second split part 2 are spliced ​​into a split shaft seal. A positioning component 3 and a tensioning component 4 are arranged between the first split part 1 and the second split part 2. The tensioning component 4 is used to fix and tighten the first split part 1 and the second split part 2. The positioning component 3 is used to position the first split part 1 and the second split part 2 so that the first split part 1 and the second split part 2 are strictly aligned.

[0024] By setting a positioning component 3 between the first split portion 1 and the second split portion 2, the first split portion 1 and the second split portion 2 are aligned by the positioning component 3 before the first split portion 1 and the second split portion 2 are fixed, thereby improving the problem that the two split surfaces of the split dry mechanical seal are difficult to align during multiple disassembly and assembly.

[0025] Reference Figure 1 and Figure 2 The positioning assembly 3 includes a positioning pin 31. Both end surfaces of the first split portion 1 and the second split portion 2 are finely ground, and a first positioning groove 11 is provided at one end of the first split portion 1, and a second positioning groove 21 is provided at the end of the second split portion 2 at a position corresponding to the first positioning groove 11. One end of the positioning pin 31 is matched with the first positioning groove 11, and the other end is matched with the second positioning groove 21. The inner diameter of the first positioning groove 11 is larger than the inner diameter of the second positioning groove 21. The positioning pin 31 is T-shaped. In order to facilitate the two ends of the positioning pin 31 to be inserted into the first positioning groove 11 and the second positioning groove 21 respectively, both ends of the positioning pin 31 are chamfered, and the positioning pin 31 is threadedly connected to the side wall of the second positioning groove 21. When the first split part 1 and the second split part 2 are installed on the rotating shaft, the positioning pin 31 is screwed into the second split part 2, and the other end of the positioning pin 31 is inserted into the first positioning groove 11, thereby realizing the positioning of the first split part 1 and the second split part 2.

[0026] Reference Figure 1 and Figure 2The tensioning assembly 4 includes a connecting screw 41. A through hole 32 for the connecting screw 41 to pass through is provided on the positioning pin 31 along the axis direction of the positioning pin 31. A slot 22 for the connecting screw 41 to be inserted is provided on the second subdivision part 2. The slot 22 is processed into a step surface, and the slot 22 is connected to the second receiving groove. The connecting screw 41 is passed between the first subdivision part 1 and the second subdivision part 2 along a direction perpendicular to the axis direction of the rotating shaft. The end of the connecting screw 41 extends into the second subdivision part 2 and is threadedly connected to the second subdivision part 2. When the connecting screw 41 is connected in place, the head of the connecting screw 41 is located in the slot 22, thereby realizing the countersunk setting of the connecting screw 41. In addition, threads are also processed on the inner wall of the through hole 32 of the positioning pin 31, and the connecting screw 41 is connected to the positioning pin 31 through threads.

[0027] The positioning pin 31 is threadedly fixed to the second split part 2, the connecting screw 41 is threadedly fixed to the first split part 1, and the connecting screw 41 is threadedly connected to the positioning pin 31, so that the first split part 1 and the second split part 2 are fixedly connected by the cooperation of the positioning pin 31 and the connecting screw 41. The positioning pin 31 can achieve the effect of connection and fixing while achieving positioning.

[0028] Reference Figure 1 Figure 3 Two positioning assemblies 3 and tensioning assemblies 4 are arranged side by side at one end of the first split part 1 and the second split part 2. The two positioning assemblies 3 and tensioning assemblies 4 are arranged side by side, which improves the positioning accuracy and connection strength. At the same time, the two side-by-side positioning pins 31 and the connecting screws 41 are arranged in reverse, that is, one of the positioning pins 31 is connected to the second split part 2, and the other positioning pin 31 is connected to the first split part 1. Two positioning assemblies 3 and tensioning assemblies 4 are also arranged at the other side ends of the first split part 1 and the second split part 2, and the positioning assemblies 3 and tensioning assemblies 4 at both ends are arranged in opposition along the center of the axis of the rotating shaft. Through the four positioning pins 31 and the connecting bolts on both sides of the first split part 1 and the second split part 2, the first split part 1 and the second split part 2 are centered and fixed at the same time, so that the split dry mechanical seal can still be positioned and fixed with high precision under the conditions of high-intensity work and multiple disassembly and assembly, thereby improving the sealing performance of the split dry mechanical seal.

[0029] The implementation principle of a split dry mechanical seal connection structure for extrusion granulation in an embodiment of the present application is as follows: by setting a positioning component 3 between the first split part 1 and the second split part 2, the first split part 1 and the second split part 2 are aligned by the positioning component 3 before the first split part 1 and the second split part 2 are fixed. Specifically, the first split part 1 and the second split part 2 are centered and fixed at the same time by four positioning pins 31 and connecting bolts on both sides of the first split part 1 and the second split part 2, so that the split dry mechanical seal can still be positioned and fixed with high precision under the conditions of high-intensity work and multiple disassembly and assembly, thereby improving the sealing performance of the split dry mechanical seal.

[0030] Finally, it should be noted that in the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A split dry mechanical seal connection structure for extrusion granulation, comprising a first split part (1) and a second split part (2), wherein the first split part (1) and the second split part (2) are spliced ​​into a ring body sleeved outside the shaft, characterized in that: A positioning assembly (3) and a tensioning assembly (4) are provided between the first split portion (1) and the second split portion (2); the tensioning assembly (4) is used to fix and tension the first split portion (1) and the second split portion (2); and the positioning assembly (3) is used to position the first split portion (1) and the second split portion (2).

2. The split dry mechanical seal connection structure for extrusion granulation according to claim 1, characterized in that: The positioning assembly (3) comprises a positioning pin (31); a first positioning groove (11) is provided at one end of the first split portion (1); a second positioning groove (21) is provided at a position corresponding to the first positioning groove (11) of the second split portion (2); one end of the positioning pin (31) is matched with the first positioning groove (11) and the other end is matched with the second positioning groove (21).

3. The split dry mechanical seal connection structure for extrusion granulation according to claim 2, characterized in that: The inner diameter of the first positioning groove (11) is greater than the inner diameter of the second positioning groove (21).

4. The split dry mechanical seal connection structure for extrusion granulation according to claim 2, characterized in that: Both ends of the positioning pin (31) are chamfered.

5. The split dry mechanical seal connection structure for extrusion granulation according to claim 2, characterized in that: The positioning pin (31) is threadedly connected to the side wall of the second positioning groove (21).

6. The split dry mechanical seal connection structure for extrusion granulation according to claim 2, characterized in that: The tensioning assembly (4) comprises a connecting screw (41), the positioning pin (31) is provided with a through hole (32) for the connecting screw (41) to pass through, the second split portion (2) is provided with a slot (22) for the connecting screw (41) to pass through, the end of the connecting screw (41) is threadedly inserted into the first split portion (1), and the connecting screw (41) is threadedly inserted through the positioning pin (31).

7. The split dry mechanical seal connection structure for extrusion granulation according to claim 1, characterized in that: Two positioning components (3) and a tensioning component (4) are arranged side by side at one end of the first split portion (1) and the second split portion (2).

8. The split dry mechanical seal connection structure for extrusion granulation according to claim 7, characterized in that: Two positioning components (3) and tensioning components (4) are also provided at the other side ends of the first split portion (1) and the second split portion (2), and the positioning components (3) and tensioning components (4) at both ends are arranged to support each other along the center of the axis of the rotating shaft.

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