Shaft end sealing structure of reaction kettle

Abstract

The utility model provides a shaft end sealing structure of a reaction kettle, which belongs to the technical field of powder processing, the shaft end sealing structure of the reaction kettle comprises a separation sleeve, a connecting flange, a graphite packing ring, a sealing mounting rack, a dynamic sealing assembly and a rack, the separation sleeve is used for sleeving the shaft end part outside the reaction kettle; the connecting flange is arranged on the periphery of the separation sleeve in a sleeving manner; the graphite packing ring is arranged on the periphery of the separation sleeve in a sleeving manner; the sealing mounting frame is arranged on the periphery of the graphite packing ring in a sleeving mode and connected with the connecting flange, and a packing cavity matched with the graphite packing ring in shape is formed in the sealing mounting frame; the dynamic sealing assembly comprises a bearing, a bearing seat and a first gland, and the bearing is used for being arranged at the shaft end outside the reaction kettle in a sleeving mode and located at the end, away from the reaction kettle, of the sealing installation frame at intervals; the machine frame is connected between the connecting flange and the bearing seat and located on the periphery of the sealing installation frame in a spaced mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder processing, and particularly relates to a shaft end sealing structure of a reaction kettle. Background Art

[0002] In the production process of artificial graphite, granulation is usually carried out on carbon powder particles. The granulation process mainly consists of equipment such as a heating kettle, a cooling kettle, a ball mill, and a fusion machine. Among them, the reaction kettle is the core equipment in the granulation workshop. In the actual production process, materials are put into the reaction kettle and heated through an external heating jacket of the reaction kettle in an inert gas atmosphere under a certain pressure. At the same time, since the above-mentioned carbon powder materials often contain binders, the material particles are bonded or reacted during the spiral ribbon stirring of the main shaft of the reaction kettle to complete coating granulation.

[0003] However, the reaction kettle is often in an environment of 600°C high temperature, inert gas, and thermal expansion of materials. When the emission of volatile gases is blocked, the internal pressure will cause irreparable damage to the sealing structure at the shaft end of the reaction kettle, resulting in the leakage of the internal materials of the reaction kettle to the workshop through the sealing structure, posing great potential safety hazards to equipment and the environment. Although a graphite ring is usually set at the shaft end of the reaction kettle on site, the graphite ring will also be damaged and cause leakage under high temperature conditions, and the cost of the graphite ring is high, increasing the manufacturing cost. Summary of the Utility Model

[0004] An embodiment of the utility model provides a shaft end sealing structure of a reaction kettle, aiming to solve the technical problems that the existing shaft end sealing structure of the reaction kettle is prone to damage and cause leakage, the existing sealing by using a graphite ring is also prone to damage, and the cost of the graphite ring is high, increasing the manufacturing cost.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a shaft end sealing structure of a reaction kettle, including:

[0006] A separating sleeve for sleeving on the shaft end outside the reaction kettle, and the separating sleeve is fixed to the transmission shaft on the reaction kettle;

[0007] A connecting flange sleeved on the outer periphery of the separating sleeve, and the connecting flange is used to connect with the reaction kettle;

[0008] A graphite packing ring sleeved on the outer periphery of the separating sleeve;

[0009] A sealing mounting frame sleeved on the outer periphery of the graphite packing ring and connected with the connecting flange, and a packing cavity adapted to the shape of the graphite packing ring is arranged in the sealing mounting frame;

[0010] The dynamic seal assembly includes a bearing, a bearing housing, and a first gland. The bearing is sleeved on the end of the shaft outside the reactor and is spaced at one end of the seal mounting frame away from the reactor.

[0011] The frame is connected between the connecting flange and the bearing housing, and the frame is spaced on the outer periphery of the seal mounting frame.

[0012] In a possible implementation, the seal mounting frame includes:

[0013] The packing seat is connected to the connecting flange. The inner circle of the packing seat is recessed to form the packing cavity, and the packing cavity extends to one end of the packing seat away from the reactor to form an opening.

[0014] The second gland is detachably connected to the packing seat, and the second gland has an insertion part that cooperates with the opening.

[0015] Wherein, when the insertion part extends into the opening, the packing cavity is sealed.

[0016] In a possible implementation, the insertion part abuts against the end of the graphite packing ring, and first oil seals are provided between the inner peripheral surfaces at both ends of the second gland and the spacer sleeve.

[0017] In a possible implementation, the packing seat further has a cooling cavity spaced on the outer periphery of the packing cavity, and a cooling water port provided on the outer wall and communicating with the cooling cavity.

[0018] In a possible implementation, an adjusting bolt is provided between the second gland and the packing seat, and the adjusting bolt is used to adjust the pressing force of the insertion part on the graphite packing ring.

[0019] In a possible implementation, through holes that are coaxial and corresponding are provided at one end of the seal mounting frame facing the connecting flange and at one end of the frame facing the connecting flange. Threaded holes that are coaxial and corresponding are provided on the connecting flange. Screws are connected between the seal mounting frame, the frame, and the connecting flange, and the screws sequentially pass through the two through holes and cooperate with the threaded holes.

[0020] In a possible implementation, a gasket is provided between the end face of the seal mounting frame and the connecting flange.

[0021] In a possible implementation, a second oil seal is provided on the inner circle of the bearing housing, and the second oil seal is spaced at one end of the bearing facing the seal mounting frame.

[0022] In a possible implementation, a third oil seal is provided on the inner circle of the first gland.

[0023] In a possible implementation, the bearing housing and the frame, as well as the first gland and the bearing housing, are all connected by threaded connectors.

[0024] In the solution shown in the embodiments of the present application, compared with the prior art, when the reactor is working, the kettle body is in a fixed state, and the transmission shaft thereon drives the internal spiral ribbon to rotate. During the rotation of the transmission shaft, the shaft end sealing structure in this embodiment is relatively stationary with the kettle body through the connecting flange and relatively rotates with the transmission shaft. However, the separating sleeve rotates with the transmission shaft, and the graphite packing ring forms a seal between the separating sleeve and the shaft end sealing structure. Moreover, the dynamic sealing assembly also realizes rotational sealing with the transmission shaft through bearings. The shaft end sealing structure of the reactor of the present utility model ensures that material dust will not escape from the gap between the graphite packing ring and the separating sleeve by setting the graphite packing ring, which has a lower cost compared with the graphite ring. And the graphite packing ring is formed by pressing, and different numbers of layers can be pressed according to different requirements, with stronger applicability. The separating sleeve is made of a harder material, which can prevent the graphite packing ring from directly contacting the transmission shaft when the reactor is working, thereby avoiding the wear of the transmission shaft caused by dust floating into it, prolonging the service life of the transmission shaft, and the separating sleeve is convenient to replace and has a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional structure diagram of the shaft end sealing structure of the reactor provided by the embodiment of the present utility model;

[0026] Description of the reference numerals:

[0027] 10 - separating sleeve;

[0028] 20 - connecting flange;

[0029] 30 - graphite packing ring;

[0030] 40 - sealing mounting bracket; 41 - packing seat; 411 - cooling cavity; 412 - cooling water inlet; 42 - second gland; 421 - insertion part; 43 - first oil seal; 44 - adjusting bolt; 45 - gasket; 46 - screw;

[0031] 50 - dynamic sealing assembly; 51 - bearing; 52 - bearing housing; 53 - first gland; 54 - second oil seal; 55 - third oil seal;

[0032] 60 - frame;

[0033] 70 - transmission shaft;

[0034] 80 - threaded connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects and not for describing a specific order.

[0037] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "center", "lateral", "longitudinal", "horizontal", "vertical", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present utility model.

[0038] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as one body and being fixedly connected through other devices or elements.

[0039] In the claims, the description and the above-mentioned drawings of the present utility model, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0040] Please refer to Figure 1, the shaft end sealing structure of the reactor provided by the present utility model will be described. The shaft end sealing structure of the reactor includes a spacer sleeve 10, a connecting flange 20, a graphite packing ring 30, a sealing mounting bracket 40, a dynamic sealing assembly 50, and a frame 60. The spacer sleeve 10 is used to sleeved on the shaft end outside the reactor, and the spacer sleeve 10 is fixed to the transmission shaft 70 on the reactor; the connecting flange 20 is sleeved on the outer periphery of the spacer sleeve 10, and the connecting flange 20 is used to connect with the reactor; the graphite packing ring 30 is sleeved on the outer periphery of the spacer sleeve 10; the sealing mounting bracket 40 is sleeved on the outer periphery of the graphite packing ring 30 and connected to the connecting flange 20, and a packing cavity adapted to the shape of the graphite packing ring 30 is provided inside the sealing mounting bracket 40; the dynamic sealing assembly 50 includes a bearing 51, a bearing seat 51, and a first gland 53. The bearing 51 is used to sleeved on the shaft end outside the reactor and is spaced at one end of the sealing mounting bracket 40 away from the reactor; the frame 60 is connected between the connecting flange 20 and the bearing seat 51, and the frame 60 is spaced on the outer periphery of the sealing mounting bracket 40.

[0041] In specific implementation, the graphite packing ring 30 can be graphite packing, etc. After filling the inside of the packing cavity with graphite packing and compacting it, the graphite packing ring 30 is formed. It can be pressed into multiple layers, and the specific number can be determined according to actual needs.

[0042] It should be noted that the spacer sleeve 10 can be a hard chromium sleeve, and its end is welded and fixed to the step of the transmission shaft 70 on the reactor.

[0043] Compared with the prior art, for the shaft end sealing structure of the reactor provided in this embodiment, when the reactor is working, the reactor body is in a fixed state, and the transmission shaft 70 thereon drives the internal spiral ribbon to rotate. During the rotation of the transmission shaft 70, the shaft end sealing structure in this embodiment is relatively stationary with the reactor body through the connecting flange 20 and relatively rotates with the transmission shaft 70. However, the spacer sleeve 10 rotates with the transmission shaft 70, and the graphite packing ring 30 forms a seal between the spacer sleeve 10 and the shaft end sealing structure, and the dynamic sealing assembly 50 also realizes rotational sealing with the transmission shaft 70 through the bearing 51. The shaft end sealing structure of the reactor of the present utility model ensures that material dust will not escape from the gap between the graphite packing ring 30 and the spacer sleeve 10 by setting the graphite packing ring 30, has a lower cost compared with the graphite ring, and the graphite packing ring 30 is formed by pressing and can be pressed into different numbers of layers according to different requirements, with stronger applicability; the material of the spacer sleeve 10 is harder, which can avoid the direct contact between the graphite packing ring 30 and the transmission shaft 70 when the reactor is working, thereby avoiding the wear of the transmission shaft 70 caused by dust floating into it, prolonging the service life of the transmission shaft 70, and the spacer sleeve 10 is convenient to replace and has a lower cost.

[0044] In some embodiments, a specific implementation manner of the above-mentioned sealing mounting seat can adopt the structure as Figure 1 shown. See Figure 1, the sealed mounting seat includes a packing seat 41 and a second gland 42. The packing seat 41 is connected to the connecting flange 20. The inner ring of the packing seat 41 is recessed to form a packing cavity, and the packing cavity extends to one end of the packing seat 41 facing away from the reactor to form an opening. The second gland 42 is detachably connected to the packing seat 41, and the second gland 42 has an insertion portion 421 that fits with the opening. When the insertion portion 421 extends into the opening, the packing cavity is sealed.

[0045] After the packing seat 41 is installed, graphite packing is filled into the packing cavity through the opening, and a graphite packing ring 30 is formed by pressing. Subsequently, the second gland 42 is installed with the packing seat 41 to seal the packing cavity. This structure facilitates the installation of the graphite packing ring 30, and the second gland 42 can also be opened at any time to replace the graphite packing ring 30 after being used for a period of time, which is convenient to use.

[0046] In some embodiments, an improved implementation manner of the above-mentioned second gland 42 can adopt the structure as Figure 1 shown. Refer to Figure 1 , the insertion portion 421 abuts against the end of the graphite packing ring 30, and first oil seals 43 are provided between the inner peripheral surfaces at both ends of the second gland 42 and the spacer sleeve 10. By providing first oil seals 43 on the inner peripheries at both ends of the second gland 42, the sealing effect can be further improved to avoid dust leakage.

[0047] In some embodiments, an improved implementation manner of the above-mentioned packing seat 41 can adopt the structure as Figure 1 shown. Refer to Figure 1 , the packing seat 41 further has a cooling cavity 411 spaced on the outer periphery of the packing cavity, and a cooling water port 412 provided on the outer wall and communicating with the cooling cavity 411. When the reactor is working, the graphite packing ring 30 may come into contact with the powder escaping along the transmission shaft 70, and the powder is generally above 600 °C. To ensure the use effect of the graphite packing ring 30, cooling water can be introduced into the cooling cavity 411 through the cooling water port 412 for cooling.

[0048] It should be noted that the cooling water port 412 includes an inlet and an outlet (only one water port is shown in the figure). By introducing cooling water into the cooling cavity 411 and flowing out from the outlet, the continuous flow of the cooling water in the cooling cavity 411 is ensured, and the cooling effect is more obvious.

[0049] In some embodiments, an improved implementation manner of the above-mentioned sealed mounting frame 40 can adopt the structure as Figure 1 shown. Refer to Figure 1, an adjusting bolt 44 is provided between the second gland 42 and the stuffing box seat 41. The adjusting bolt 44 is used to adjust the pressing force of the insertion part 421 on the graphite packing ring 30. If dust leakage is found during use, the pressing force on the graphite packing ring 30 can be adjusted by tightening the adjusting bolt 44. Furthermore, the fitting effect between the graphite packing ring 30 and the spacer sleeve 10 is better, reducing dust leakage, facilitating adjustment at any time, and making the use more flexible.

[0050] In some embodiments, a specific connection method of the above-mentioned seal mounting seat, frame 60, and connecting flange 20 can adopt the structure as Figure 1 shown. Refer to Figure 1 , through holes that are coaxial and corresponding are provided at one end of the seal mounting frame 40 facing the connecting flange 20 and one end of the frame 60 facing the connecting flange 20. Threaded holes that are coaxial and corresponding are provided on the connecting flange 20. Screws 46 are connected between the seal mounting frame 40, the frame 60, and the connecting flange 20. The screws 46 sequentially pass through the two through holes and are matched with the threaded holes. That is, the frame 60 and the seal mounting frame 40 are connected to the connecting flange 20 through the same screw 46, and the installation steps are simpler, saving time during the assembly process.

[0051] In some embodiments, an improved fitting method of the above-mentioned seal mounting frame 40 and connecting flange 20 can adopt the structure as Figure 1 shown. Refer to Figure 1 , a gasket 45 is provided between the end face of the seal mounting frame 40 and the connecting flange 20. Optionally, the gasket 45 is made of metal, which can play a sealing role between the seal mounting frame 40 and the connecting flange 20 to prevent the leakage of intermediate material dust.

[0052] In some embodiments, an improved implementation manner of the above-mentioned bearing 51 seat can adopt the structure as Figure 1 shown. Refer to Figure 1 , a second oil seal 54 is provided on the inner ring of the bearing 51 seat, and the second oil seal 54 is spaced at one end of the bearing 51 facing the seal mounting frame 40.

[0053] Specifically, a third oil seal 55 is provided on the inner ring of the first gland 53.

[0054] In this embodiment, the bearing 51 is selected to be of a self-lubricating type. The self-lubricating bearing 51 has a better use effect. It can not only prevent the influence of oil contamination on the use of the bearing 51, but also ensure the normal movement of the reaction kettle transmission shaft 70, and can also solve the axial expansion of the shaft end of the transmission shaft 70 caused by heat. The second oil seal 54 and the third oil seal 55 also play a sealing role to prevent the leakage of material dust.

[0055] In some embodiments, a specific assembly method of the above-mentioned dynamic seal assembly 50 can adopt the structure as Figure 1 shown. Refer to Figure 1, both between the bearing 51 seat and the frame 60 and between the first gland 53 and the bearing 51 seat are connected by a threaded connector 80. This connection structure is relatively simple, and it is convenient to disassemble and replace the internal bearing 51, with low maintenance costs.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shaft end sealing structure of a reactor, characterized in that: include: A separation sleeve, used to be sleeved on the end of the shaft outside the reactor, and the separation sleeve is fixed to the transmission shaft on the reactor; A connecting flange, which is sleeved on the outer circumference of the separation sleeve, and is used to connect with the reaction kettle; A graphite packing ring is sleeved on the outer periphery of the separation sleeve; A sealing mounting frame, which is sleeved on the outer circumference of the graphite packing ring and connected to the connecting flange, wherein a packing cavity adapted to the shape of the graphite packing ring is provided in the sealing mounting frame; A dynamic seal assembly, comprising a bearing, a bearing seat and a first gland, wherein the bearing is used to be sleeved on the shaft end outside the reactor and is spaced apart at one end of the seal mounting frame away from the reactor; A frame is connected between the connecting flange and the bearing seat, and the frame is spaced and located at the periphery of the sealing mounting frame.

2. The axial end sealing structure of the reactor according to claim 1, characterized in that: The sealing mounting frame comprises: A packing seat connected to the connecting flange, wherein the inner ring of the packing seat is recessed to form the packing cavity, and the packing cavity extends to an end of the packing seat away from the reactor to form an opening; A second gland, detachably connected to the packing seat, the second gland having an inserting portion matched with the opening; Wherein, when the inserting portion extends into the opening, the filling cavity is sealed.

3. The axial end sealing structure of the reactor according to claim 2, characterized in that: The inserting portion is in contact with the end of the graphite packing ring, and a first oil seal is disposed between the inner circumferential surfaces at both ends of the second gland and the separation sleeve.

4. The axial end sealing structure of the reactor according to claim 2, characterized in that: The packing seat also has a cooling cavity spaced apart and located at the periphery of the packing cavity, and a cooling water port arranged on the outer wall and communicated with the cooling cavity.

5. The axial end sealing structure of the reactor according to claim 2, characterized in that: An adjusting bolt is provided between the second gland and the packing seat, and the adjusting bolt is used to adjust the pressing force of the inserting portion on the graphite packing ring.

6. The axial end sealing structure of the reactor according to claim 1, characterized in that: One end of the sealing mounting frame facing the connecting flange and one end of the frame facing the connecting flange are both provided with coaxial and corresponding through holes, and the connecting flange is provided with a threaded hole coaxial with and corresponding to the through hole. Screws are connected between the sealing mounting frame, the frame and the connecting flange, and the screws pass through the two through holes in sequence and cooperate with the threaded holes.

7. The axial end sealing structure of the reactor according to claim 1, characterized in that: A gasket is provided between the end surface of the sealing mounting frame and the connecting flange.

8. The axial end sealing structure of the reactor according to claim 1, characterized in that: The inner ring of the bearing seat is provided with a second oil seal, and the second oil seal is spaced and located at one end of the bearing facing the seal mounting frame.

9. The axial end sealing structure of the reactor according to claim 8, characterized in that: The inner ring of the first gland is provided with a third oil seal.

10. The axial end sealing structure of the reactor according to claim 1, characterized in that: The bearing seat and the frame, as well as the first pressure cover and the bearing seat are connected via threaded connectors.

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