Vacuum pipeline compensation fixing device for sintering furnace

Abstract

The utility model discloses a vacuum pipeline compensation fixing device for a sintering furnace, which comprises a mechanical pump set and a vacuum pump set, the top of the mechanical pump set is fixedly connected with the vacuum pump set, and the top of the vacuum pump set is provided with a compensation assembly. The corrugated pipe body is connected with the vacuum pump set through the lower flange, the upper flange is connected with the external connecting pipeline, the supporting rods are arranged on the periphery of the corrugated pipe body, resonance and damage caused by vibration between the pipelines can be removed through the telescopic capacity of the corrugated pipe body, and the supporting rods are independently arranged on the periphery of the corrugated pipe body. One end of the supporting rod is fixed with the upper flange through an adjustable nut, the lower end of the supporting rod is provided with a rubber buffering pad which is nested on the lower flange, and a certain movable buffering allowance is reserved, so that in the evacuation process, the situation that the axial deformation of the corrugated pipe body is too large and compensation is formed due to the change of the air pressure difference inside and outside the corrugated pipe body can be buffered, and the service life of the corrugated pipe is prolonged. And meanwhile, corresponding damage caused by mutual vibration of the pump sets in the working process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature vacuum sintering furnace technology, and in particular to a vacuum pipeline compensation and fixing device for sintering furnaces. Background Technology

[0002] When operating a high-temperature vacuum sintering furnace, it is necessary to evacuate the interior. As the evacuation process proceeds, the pipes connecting the vacuum pump and the sintering furnace are prone to axial and radial deformation. Therefore, corrugated pipes are generally used for compensating connections. However, during the evacuation process, the existing corrugated pipes will undergo excessive compression due to radial deformation as the vacuum level decreases. At the same time, as the internal air pressure decreases, the upper and lower flanges of the corrugated pipe will generate axial offset tensile forces, causing the entire corrugated pipe to deform. Over time, this will cause damage to the compensation system and fatigue damage to the pipe welding and fixing structures. Utility Model Content

[0003] The purpose of this utility model is to provide a vacuum pipeline compensation and fixing device for sintering furnaces. The corrugated pipe body is connected to the vacuum pump group via a lower flange, and the upper flange is connected to the external connecting pipe. Support rods are provided around the corrugated pipe body. The extensibility of the corrugated pipe body can relieve the resonance and damage caused by the vibration between the pipes. There is a separate support rod around the corrugated pipe body. One end of the support rod is fixed to the upper flange with an adjustable nut, and a rubber buffer pad is installed at the lower end, which is nested on the lower flange, leaving a certain amount of movable buffering margin. In this way, during the evacuation process, the excessive axial deformation of the corrugated pipe body caused by the change of air pressure difference between the inside and outside of the corrugated pipe body can be buffered, thus forming compensation, thereby extending the service life of the corrugated pipe, and at the same time avoiding the corresponding damage caused by the mutual vibration of the pump group during operation.

[0004] To achieve the above objectives, a vacuum pipeline compensation and fixing device for a sintering furnace is provided, comprising: a mechanical pump group and a vacuum pump group. The top of the mechanical pump group is fixedly connected to the vacuum pump group, and a compensation component is provided on the top of the vacuum pump group. The compensation component includes a lower flange, a bellows body, an upper flange, a support rod, and a shock-absorbing pad. The lower flange is fixedly connected to the vacuum pump group by bolts. The top of the lower flange is fixedly connected to the bellows body, and the top of the bellows body is fixedly connected to the upper flange. A support rod is provided between the upper flange and the lower flange. A shock-absorbing pad is sleeved on the bottom of the support rod, and a nut is threaded onto the circumferential surface of the support rod.

[0005] According to the vacuum pipeline compensation and fixing device for the sintering furnace, the corrugated pipe body is a metal corrugated pipe.

[0006] According to the vacuum pipe compensation and fixing device for the sintering furnace, the number of shock-absorbing pads on the support rod is four, and they are evenly distributed around the corrugated pipe body.

[0007] According to the vacuum pipeline compensation and fixing device for the sintering furnace, the top and bottom of the support rod are respectively inserted into the lower flange and the upper flange, and the shock-absorbing pad is snapped into the lower flange.

[0008] According to the vacuum pipeline compensation and fixing device for the sintering furnace, the support rod is fixedly connected to the upper flange by a nut.

[0009] The above solution has the following beneficial effects: By setting up a lower flange, a bellows body, an upper flange, support rods, and vibration damping pads, the bellows body is connected to the vacuum pump unit via the lower flange, and the upper flange is connected to the external connecting pipe. Support rods are set around the bellows body itself. The extensibility of the bellows body can relieve the resonance and damage caused by the vibration between the pipes. There is a separate support rod around the bellows body. One end of the support rod is fixed to the upper flange with an adjustable nut, and a rubber buffer pad is installed at the lower end, nested on the lower flange, leaving a certain amount of movement buffering margin. In this way, during the evacuation process, the excessive axial deformation of the bellows body caused by the change of air pressure difference inside and outside the bellows body can be buffered, forming compensation, thereby extending the service life of the bellows, and at the same time avoiding the corresponding damage caused by the mutual vibration of the pump unit during operation.

[0010] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0012] Figure 1 This is a front view of the vacuum pipeline compensation and fixing device for the sintering furnace of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the vacuum pipeline compensation and fixing device for sintering furnace of this utility model;

[0014] Figure 3 This is a side view of the vacuum pipeline compensation and fixing device for the sintering furnace of this utility model.

[0015] Legend:

[0016] 1. Mechanical pump unit; 2. Vacuum pump unit; 3. Compensation assembly; 301. Lower flange; 302. Bellows body; 303. Upper flange; 304. Support rod; 305. Vibration damping pad. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Reference Figure 1-3This utility model discloses a vacuum pipeline compensation and fixing device for a sintering furnace, comprising: a mechanical pump group 1 and a vacuum pump group 2. The top of the mechanical pump group 1 is fixedly connected to the vacuum pump group 2. The top of the vacuum pump group 2 is provided with a compensation component 3, which includes a lower flange 301, a bellows body 302, an upper flange 303, a support rod 304, and a shock-absorbing pad 305. The lower flange 301 is fixedly connected to the vacuum pump group 2 by bolts, and the top of the lower flange 301 is fixedly connected to the bellows body 302, which is a metal bellows. The bellows body 302 can deform axially and radially to cope with the deformation force generated by the pressure difference between the inside and outside of the vacuum during the vacuuming process. An upper flange 303 is fixedly connected to the top of the bellows body 302 and is fixedly connected to an external connecting pipe. A support rod 304 is provided between the upper flange 303 and the lower flange 301. A shock-absorbing pad 305 is sleeved at the bottom of the support rod 304. A nut is threaded onto the circumferential surface of the support rod 304. Four shock-absorbing pads 305 are evenly distributed on each support rod 304. Distributed around the bellows body 302, the top and bottom of the support rod 304 are respectively inserted into the lower flange 301 and the upper flange 303. The damping pad 305 is snapped into the lower flange 301. The support rod 304 is fixedly connected to the upper flange 303 by a nut. The top of the support rod 304 is fixedly connected to the upper flange 303 by a nut, and the bottom of the support rod 304 is inserted into the lower flange 301 and fixed by an adjustable nut. The damping pad 305 is placed between the nut and the lower flange 301 to reduce the vibration generated by the vacuum pump unit 2 during operation. The vibration is prevented and the bellows body 302 resonates. At the same time, when the vacuum pump group 2 is evacuating, the bellows body 302 will passively decrease and compress as the vacuum level increases. The higher the vacuum level, the greater the compression of the bellows body 302. When the vacuum is broken, the bellows body 302 will return to its original shape. During this process, the support rod 304 and the shock-absorbing pad 305 can work together to cope with the expansion and contraction of the bellows body 302, thereby avoiding the tearing, air leakage and other phenomena caused by the long-term compression and reciprocating motion of the bellows body 302, thus extending the service life of the bellows body 302.

[0021] Working principle: The support rod 304 is fixedly connected to the upper flange 303 by a nut. The top of the support rod 304 is also fixedly connected to the upper flange 303 by a nut. The bottom of the support rod 304 is inserted into the lower flange 301 and fixed with an adjustable nut, leaving a buffer margin between the support rod 304 and the lower flange 301. A shock-absorbing pad 305 is placed between the nut and the lower flange 301 to reduce the vibration generated by the vacuum pump unit 2 during operation and prevent resonance of the bellows body 302. When the vacuum pump unit 2 is evacuating, the bellows... The bellows body 302 will be passively compressed as the vacuum level increases. The higher the vacuum level, the greater the compression of the bellows body 302. When the vacuum is broken, the bellows body 302 will return to its original shape. During this process, the support rod 304 and the shock-absorbing pad 305 can work together to cope with the expansion and contraction of the bellows body 302, thereby avoiding the tearing, air leakage and other phenomena caused by the long-term compression and reciprocating motion of the bellows body 302, thus extending the service life of the bellows body 302. The contents not described in detail in this specification are the prior art known to those skilled in the art.

[0022] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A vacuum pipeline compensation and fixing device for a sintering furnace, including: A mechanical pump assembly (1) and a vacuum pump assembly (2) are characterized in that a vacuum pump assembly (2) is fixedly connected to the top of the mechanical pump assembly (1), and a compensation component (3) is provided on the top of the vacuum pump assembly (2). The compensation component (3) includes a lower flange (301), a bellows body (302), an upper flange (303), a support rod (304), and a shock-absorbing pad (305). The lower flange (301) is fixedly connected to the vacuum pump assembly (2) by bolts. A bellows body (302) is fixedly connected to the top of the lower flange (301), and an upper flange (303) is fixedly connected to the top of the bellows body (302). A support rod (304) is provided between the upper flange (303) and the lower flange (301). A shock-absorbing pad (305) is sleeved on the bottom of the support rod (304), and a nut is threaded on the circumferential surface of the support rod (304).

2. The vacuum pipeline compensation and fixing device for a sintering furnace according to claim 1, characterized in that, The corrugated pipe body (302) is a metal corrugated pipe.

3. The vacuum pipeline compensation and fixing device for a sintering furnace according to claim 1, characterized in that, The support rod (304) has four shock-absorbing pads (305), which are evenly distributed around the corrugated pipe body (302).

4. The vacuum pipeline compensation and fixing device for a sintering furnace according to claim 1, characterized in that, The top and bottom of the support rod (304) are respectively inserted into the lower flange (301) and the upper flange (303), and the shock-absorbing pad (305) is snapped into the lower flange (301).

5. The vacuum pipeline compensation and fixing device for a sintering furnace according to claim 1, characterized in that, The support rod (304) is fixedly connected to the upper flange (303) by a nut.

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