Pipeline cleaning device

Abstract

The utility model discloses a pipeline cleaning device which comprises a hollow pipe, the bottom of the hollow pipe is sealed, and a plurality of ratchets which are evenly distributed are arranged on the edge of the bottom of the hollow pipe. A plurality of side exhaust holes are formed in the portion, between every two adjacent ratchets, of the hollow pipe, and a plurality of bottom exhaust holes are formed in the bottom of the hollow pipe. The top of the hollow pipe is fixedly connected with a hose; a handle is fixed on the outer side of the upper section of the hollow pipe. The lower teeth at the front end can crush the silicon scale under the action of thrust after making contact with the silicon scale, in the process of pulling back the device, the tips of the upper teeth can make contact with the silicon scale again, secondary crushing is conducted, and the cleaning speed of the silicon scale in the pipeline is greatly increased; and inert gas is introduced into the hollow pipe through the hose and discharged from the side exhaust holes and the bottom exhaust holes, sparks generated during cleaning are isolated from air, flash burning and flash explosion are prevented, and the purpose of safe cleaning is achieved.

Description

Technical field:

[0001] The utility model relates to the field of polysilicon production, in particular to a pipeline cleaning device. Background technology:

[0002] At present, the main process technology for producing polysilicon at home and abroad is the "modified Siemens method", which uses silicon powder and hydrogen chloride to synthesize trichlorosilane at a certain temperature, and then separates and distills the trichlorosilane. The purified high-purity trichlorosilane is mixed with hydrogen in proportion, and then introduced into a polysilicon reduction furnace at a certain temperature and pressure. A deposition reaction is carried out on the energized high-temperature silicon core to generate polysilicon. The reaction temperature is controlled at about 1080°C, and finally a rod-shaped polysilicon product is generated, while by-products such as silicon tetrachloride, dichlorosilane, and hydrogen chloride are generated.

[0003] During the production process, the high-temperature exhaust gas formed by the trichlorosilane that did not participate in the reaction in the reduction furnace and the by-products such as silicon tetrachloride, dichlorosilane, and hydrogen chloride generated will be deposited on the pipe wall to form silica scale when flowing through the exhaust gas cooling jacket. As the thickness of the silica scale increases, on the one hand, the heat exchange effect of the exhaust gas cooling jacket becomes worse, affecting the production of subsequent processes. On the other hand, it causes the diameter of the exhaust gas cooling jacket to become smaller, resulting in an increase in the pressure in the reduction furnace, which increases the operation risk of the reduction furnace. Therefore, it needs to be cleaned regularly.

[0004] At present, when cleaning the silica scale on the exhaust gas cooling jacket, a stick-shaped tool is usually used for cleaning. During use, since the outer surface of the silica scale is usually inclined, the end of the stick-shaped tool cannot quickly break the silica scale, resulting in a long cleaning time. In addition, during the cleaning process, sparks are easily generated due to the direct collision and friction between the stick-shaped tool and the silica scale. The silica scale contains flammable and explosive substances such as dichlorosilane, which also poses certain safety risks. Utility model content:

[0005] The utility model aims to provide a pipeline cleaning device.

[0006] The utility model is implemented by the following technical solutions:

[0007] A pipe cleaning device comprises a hollow pipe, the bottom of which is sealed, and a plurality of evenly distributed ratchet teeth are provided on the bottom edge of the hollow pipe; the ratchet teeth are composed of upper teeth and lower teeth, and the upper teeth and lower teeth are both quadrangular pyramids, a part of the bottom surface of the lower teeth is fixed to the bottom end surface of the hollow pipe, the bottom surface of the upper teeth and another part of the bottom surface of the lower teeth are fixed to the bottom end surface of the hollow pipe, and a side surface of the bottom surface of the teeth is fixed to the side surface of the hollow pipe; a plurality of side exhaust holes are opened on the hollow pipe between two adjacent ratchet teeth, and a plurality of bottom exhaust holes are opened at the bottom of the hollow pipe; a hose is fixedly connected to the top of the hollow pipe; and a handle is fixed to the outer side of the upper section of the hollow pipe.

[0008] Preferably, the hose is connected to the hollow tube via a connecting nut.

[0009] Preferably, the handle is communicated with the hollow tube, and a pressure regulating hole is provided on the handle, and the direction of the pressure regulating hole is toward the ratchet tooth.

[0010] The advantages of the utility model are as follows: the lower teeth at the front end will crush the silicon scale under the action of thrust after contacting with the silicon scale, thereby achieving the effect of cleaning the silicon scale; and the ratchet teeth are distributed on the bottom edge of the hollow pipe, and the silicon scale attached to the inner wall of the pipe circumferentially will be crushed by the ratchet teeth; in the process of pulling the device back, the tip of the upper tooth will contact with the silicon scale again, and then crush it for the second time, which greatly speeds up the cleaning speed of the silicon scale in the pipeline; and inert gas is introduced into the hollow pipe through a hose and discharged from the side exhaust hole and the bottom exhaust hole, so that the sparks generated during cleaning are isolated from the air, preventing flash fire and explosion, and achieving the purpose of safe cleaning. Description of the drawings:

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 A partial enlarged view of

[0013] Figure 3 It is a bottom view of the ratchet fixed position of the utility model;

[0014] Figure 4 It is a schematic diagram of the connection between the handle and the hollow tube of the utility model.

[0015] In the figure: hollow tube 1, ratchet 2, upper teeth 2.1, lower teeth 2.2, side exhaust hole 3, bottom exhaust hole 4, hose 5, handle 6, connecting nut 7, pressure regulating hole 8. Specific implementation method:

[0016] like Figures 1 to 4 As shown, a pipeline cleaning device comprises a hollow tube 1, the bottom of the hollow tube 1 is sealed, and a plurality of evenly distributed ratchet teeth 2 are arranged at the bottom edge of the hollow tube 1; the ratchet teeth 2 are composed of an upper tooth 2.1 and a lower tooth 2.2, and the upper tooth 2.1 and the lower tooth 2.2 are both quadrangular pyramids, a part of the bottom surface of the lower tooth 2.2 is fixed to the bottom end surface of the hollow tube 1, the bottom surface of the upper tooth 2.1 and another part of the bottom surface of the lower tooth 2.2 are fixed to the bottom end surface of the hollow tube 1, and a side surface of the bottom surface of the tooth is fixed to the side surface of the hollow tube 1; a plurality of side exhaust holes 3 are opened on the hollow tube 1 between two adjacent ratchet teeth 2, and a plurality of bottom exhaust holes 4 are opened at the bottom of the hollow tube 1; a hose 5 is fixedly connected to the top of the hollow tube 1; a handle 6 is fixed to the outer side of the upper section of the hollow tube 1;

[0017] When in use, the device is placed in the pipeline with the ratchet 2 as the front end, and the worker grasps the handle 6 and pushes the device along the pipeline axial direction. The lower teeth 2.2 at the front end will first contact the silica scale. The ends of each lower tooth 2.2 are pointed. After contacting the silica scale, the silica scale will be broken under the action of the thrust, thereby achieving the effect of cleaning the silica scale. Moreover, the ratchet teeth 2 are distributed at the bottom edge of the hollow pipe 1. When pushed, the silica scale attached to the inner wall of the pipeline in the circumferential direction will be broken by the ratchet teeth 2. In the process of pulling the device back, the tip of the upper tooth 2.1 will contact the silica scale again, and then break it for the second time. Each push and pull can clean the silica scale in multiple directions. Repeated push and pull for many times, and small rotation at a certain angle will clean all the silica scale, greatly accelerating the cleaning speed of the silica scale in the pipeline.

[0018] Moreover, during use, an inert gas, such as nitrogen, is introduced into the hollow tube 1 through the hose 5 and discharged from the side exhaust hole 3 and the bottom exhaust hole 4, so that sparks generated during cleaning are isolated from the air, flash fire and explosion are prevented, and the purpose of safe cleaning is achieved.

[0019] The hose 5 is connected to the hollow tube 1 via a connecting nut 7. The connecting nut 7 is used to detachably connect the hose 5 to the hollow tube 1, thereby improving the portability of the device and allowing the hose 5 or the device body to be replaced separately when it is damaged.

[0020] The handle 6 is connected to the hollow tube 1, and a pressure regulating hole 8 is opened on the handle 6, and the direction of the pressure regulating hole 8 is toward the ratchet 2; when in use, the inert gas will be discharged from the pressure regulating hole 8, and the dust overflowing in the pipeline will be blown into the pipeline to prevent the influence of silicon powder on the human body; if the ratchet 2 of the present device requires an inert gas with a higher pressure, the worker will block the pressure regulating hole 8 by hand, and the inert gas discharged from the side exhaust hole 3 and the bottom exhaust hole 4 will have a higher pressure.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline cleaning device, characterized in that: It comprises a hollow tube, the bottom of which is sealed, and a plurality of evenly distributed ratchets are arranged on the bottom edge of the hollow tube; the ratchets are composed of upper teeth and lower teeth, and both the upper teeth and the lower teeth are quadrangular pyramids, a part of the bottom surface of the lower teeth is fixed to the bottom end surface of the hollow tube, the bottom surface of the upper teeth and another part of the bottom surface of the lower teeth are fixed to the bottom end surface of the hollow tube, and a side surface of the bottom surface of the teeth is fixed to the side surface of the hollow tube; a plurality of side exhaust holes are opened on the hollow tube between two adjacent ratchets, and a plurality of bottom exhaust holes are opened at the bottom of the hollow tube; a hose is fixedly connected to the top of the hollow tube; and a handle is fixed to the outer side of the upper section of the hollow tube.

2. A pipeline cleaning device according to claim 1, characterized in that: The hose is connected to the hollow tube via a connecting nut.

3. A pipeline cleaning device according to claim 1 or 2, characterized in that: The handle is communicated with the hollow tube, a pressure regulating hole is provided on the handle, and the direction of the pressure regulating hole is toward the ratchet.

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