Built-in circulating water jacket joint for reducing furnace bearing cooling

Abstract

The utility model discloses a built-in circulating water jacket joint for cooling a bearing of a reduction furnace, which comprises an air outlet end cover rotating along with a rotary drum in the reduction furnace, an air outlet pipeline penetrating through the air outlet end cover from inside to outside and extending out, and a water cooling sleeve with two closed ends, the water cooling sleeve is fixedly sleeved between the air pipeline and the inner ring of the bearing and used for cooling the air outlet pipeline and the bearing, and a water inlet and a water outlet are correspondingly formed in the two opposite sides of the outer end of the water cooling sleeve respectively. The bearing cooling device is simple in structure, the air outlet pipeline and the bearing can be effectively cooled, an existing external spraying mode is replaced for cooling the bearing, the problem that the bearing is abnormally stuck due to heating is solved, meanwhile, the negative effects of inconvenient field management and poor environment cannot be generated, and the service life of the bearing is prolonged. And the service life of the bearing in a high-temperature gas environment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction furnaces, in particular to a built-in circulating water jacket joint for cooling bearings of a reduction furnace. Background Art

[0002] A reduction furnace is a heating device that heats metal powder to a specific temperature under the protection of hydrogen, so that the oxygen content in the metal powder is reduced and replaced by hydrogen, so that the oxygen content of the metal powder reaches the process requirements.

[0003] At present, the reduction furnace is mainly composed of five parts: 32 groups of heating wires, 3 groups of temperature controllers, 2 groups of metal powder drums, hydrogen / nitrogen inlet cover and hydrogen outlet cover. In the production of the reduction furnace, hydrogen enters the reduction furnace box from the inlet end. Since the temperature in the box is usually maintained at around 1000°C, when the hydrogen passes through the box to the outlet, its temperature is also maintained at around 500-600°C. Under normal circumstances, the outlet cover is required to rotate continuously during operation to keep the metal powder in the rotating cylinder (drum) fully heated (similar to the stirring effect), and the outer side of the outlet cover is connected to a stainless steel outlet pipe, and the outlet pipe is connected to a long-fire water seal tank. Therefore, the outlet pipe needs to remain fixed, and for this reason, the outlet cover and the outlet pipe are connected by bearings.

[0004] As can be seen from the above, since the bearings work in a high temperature environment of 500-600℃ for a long time, their service life is very short and they often get stuck abnormally. In order to solve this problem, the commonly used technical means is to use external spraying to cool the bearing parts. The water under the spraying flows into the pool or water tank below, and then is pumped out by a submersible pump for recycling. However, this cooling method has the disadvantages of poor spraying effect, the water in the pool is easy to deteriorate and mildew, resulting in a poor environment, and makes on-site management difficult. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects and shortcomings of the prior art and to provide a built-in circulating water jacket joint for cooling the bearings of a reduction furnace, which can effectively cool the gas outlet pipe and the bearings, replacing the existing external spraying method for cooling the bearings, so as to solve the problem of abnormal jamming due to heating of the bearings, while not causing the negative effects of inconvenience in on-site management and poor environment, and prolonging the service life of the bearings in a high-temperature gas environment.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A built-in circulating water jacket joint for cooling the bearing of a reduction furnace, comprising an outlet end cover rotating with a rotating drum inside the reduction furnace and an outlet pipe extending from the inside to the outside through the outlet end cover, wherein the outlet pipe is rotatably matched with the outlet end cover through a bearing, and is characterized in that: it also comprises a water-cooling sleeve with both ends closed, the water-cooling sleeve is fixedly sleeved between the outlet pipe and the inner ring of the bearing, and is used for cooling the outlet pipe and the bearing, and the outer end of the water-cooling sleeve is provided with a water inlet and a water outlet on two opposite sides respectively.

[0008] Furthermore, a sleeve is fixedly connected to the outer surface of the outlet end cover, and the sleeve extends along the axial direction of the outlet pipe and is coaxially arranged with the outlet pipe.

[0009] Furthermore, a through hole is provided in the middle of the outlet cover, the inner end of the water cooling sleeve passes through the through hole from the outside to the inside and extends to the inside of the outlet cover, and the water cooling sleeve is rotatably sleeved in the through hole and sealed with the through hole.

[0010] Furthermore, an open bearing installation cavity is provided at the outer end of the sleeve, and the outer ring of the bearing is fixedly sleeved in the bearing installation cavity.

[0011] Furthermore, a positioning piece is sleeved on the outer end of the water-cooling sleeve for axially positioning the bearing.

[0012] Furthermore, the positioning member includes an external nut and an internal nut, the external nut is fixedly sleeved on the outer end of the water-cooling sleeve, and the internal nut is screwed onto the outside of the external nut. The internal nut is rotated toward the bearing and tightened, and the internal nut abuts against the outer side of the inner ring of the bearing.

[0013] Furthermore, the length of the internal thread nut is greater than the length of the external thread nut.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model has a simple structure. A water-cooling sleeve is arranged between the air outlet pipe and the inner ring of the bearing. On the basis of not rotating with the air outlet end cover, the air outlet pipe and the bearing can be effectively cooled, instead of the existing external spraying method for cooling the bearing, and the problem of abnormal jamming due to heating of the bearing is solved. At the same time, the negative influence of inconvenience in on-site management and poor environment will not be generated, and the service life of the bearing in a high-temperature gas environment is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1Schematic diagram of the enlarged structure of part A. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0019] See also Figure 1 , 2 A built-in circulating water jacket joint for cooling the bearing of a reduction furnace includes an outlet cover 1 that rotates with a rotating drum inside the reduction furnace and an outlet pipe 2 that extends from the inside to the outside and penetrates the outlet cover 1. The outlet pipe 2 is rotatably matched with the outlet cover 1 through a bearing 3. The water cooling sleeve 4 also includes a water cooling sleeve 4 with both ends closed. The water cooling sleeve 4 is fixedly sleeved between the outlet pipe 2 and the inner ring of the bearing 3 for cooling the outlet pipe 2 and the bearing 3. The outer end of the water cooling sleeve 4 is provided with a water inlet 5 and a water outlet 6 on opposite sides respectively.

[0020] In the utility model, a sleeve 7 is fixedly connected to the outer surface of the outlet cover 1 , and the sleeve 7 extends along the axial direction of the outlet pipe 2 and is coaxially arranged with the outlet pipe 2 .

[0021] In the utility model, a through hole (not shown in the figure) is provided in the middle of the outlet end cover 1, and the inner end of the water-cooling sleeve 4 passes through the through hole from the outside to the inside and extends to the inside of the outlet end cover 1. The water-cooling sleeve 4 is rotatably sleeved in the through hole and is sealed with the through hole.

[0022] Therefore, by extending the water-cooling sleeve 4 to the inside of the outlet end cover 1, and rotating the water-cooling sleeve 4 into the through hole, and sealing with the through hole, the heat exchange area between the outlet pipe 2 can be increased as much as possible without causing hydrogen leakage, thereby obtaining a better cooling effect.

[0023] In the present invention, an open bearing installation cavity 8 is provided at the outer end of the sleeve 7, and the outer ring of the bearing 3 is fixedly sleeved in the bearing installation cavity 8, so as to realize the installation of the bearing 3.

[0024] In the utility model, a positioning member 9 is sleeved on the outer end of the water-cooling sleeve 4 for axially positioning the bearing 3 .

[0025] In the present invention, the positioning member 9 includes an outer nut 91 and an inner nut 92 . The outer nut 91 is fixedly sleeved on the outer end of the water-cooling sleeve 4 , and the inner nut 92 is screwed onto the outside of the outer nut 91 .

[0026] Thus, by rotating and tightening the internal nut 92 along the axial direction of the external nut 91 toward the bearing 3 , the internal nut 92 is brought into contact with the outer side of the inner ring of the bearing 3 , thereby achieving axial positioning of the bearing 3 .

[0027] In the present invention, the length of the internal thread nut 92 is greater than that of the external thread nut 91 , so as to facilitate tightening the internal thread nut 92 .

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] Before use, a water inlet pipe and a water outlet pipe (not shown in the figure) are respectively connected to the water inlet 5 and the water outlet 6, and both the water inlet pipe and the water outlet pipe lead to a closed water tank. A submersible pump connected to the water inlet pipe is arranged in the water tank.

[0030] When in use, the cooling water in the water tank is pumped by the submersible pump through the water inlet pipe and the water inlet 5 to the water cooling jacket 4, and exchanges heat with the air outlet pipe 2 and the bearing 3. After quickly and effectively cooling the air outlet pipe 2 and the bearing 3, the water is returned to the water tank through the water outlet 6 and the water outlet pipe, thereby realizing recycling.

[0031] Since the cooling water circulates in a closed space, compared with the existing external spraying method for cooling the bearing 3, it can solve the problem of abnormal jamming caused by heating of the bearing 3 without causing splashing of the spraying water. It does not require on-site personnel to manage it, and avoids the environmental problem of water body easily deteriorating and mildewing, thereby avoiding the negative impact of inconvenient on-site management and poor environment.

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A built-in circulating water jacket joint for reducing furnace bearing cooling, comprising an outlet cover rotating with a rotating drum inside the reducing furnace and an outlet pipe extending from the inside to the outside through the outlet cover, wherein the outlet pipe is rotatably matched with the outlet cover through a bearing, and characterized in that: It also includes a water cooling sleeve with both ends closed. The water cooling sleeve is fixedly sleeved between the air outlet pipe and the inner ring of the bearing for cooling the air outlet pipe and the bearing. The outer end of the water cooling sleeve is provided with a water inlet and a water outlet on two opposite sides respectively.

2. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 1, characterized in that: A sleeve is fixedly connected to the outer surface of the outlet end cover, and the sleeve extends along the axial direction of the outlet pipe and is coaxially arranged with the outlet pipe.

3. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 2, characterized in that: A through hole is provided in the middle of the outlet cover, the inner end of the water cooling sleeve passes through the through hole from outside to inside and extends to the inside of the outlet cover, and the water cooling sleeve is rotatably sleeved in the through hole and sealed with the through hole.

4. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 2, characterized in that: An open bearing installation cavity is arranged at the outer end of the sleeve, and the outer ring of the bearing is fixedly sleeved in the bearing installation cavity.

5. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 4, characterized in that: The outer end of the water-cooling sleeve is sleeved with a positioning piece for axially positioning the bearing.

6. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 5, characterized in that: The positioning piece includes an external nut and an internal nut. The external nut is fixedly sleeved on the outer end of the water-cooling sleeve, and the internal nut is screwed onto the outside of the external nut. The internal nut is rotated toward the bearing and tightened, and the internal nut abuts against the outer side of the inner ring of the bearing.

7. The internal circulating water jacket joint for reducing furnace bearing cooling according to claim 6, characterized in that: The length of the internal thread nut is greater than the length of the external thread nut.

Images