Blind plate with flow guide channel and pipeline plugging device comprising blind plate

Abstract

The utility model relates to a blind plate with a flow guide channel and a pipeline plugging device comprising the blind plate. The blind plate comprises a body, the body is of a circular plate structure and comprises a front face, a back face and a side face, the front face makes contact with media, the back face and the front face are oppositely arranged, the front face is circular and is connected with the back face through the side face, the front face is provided with a feeding hole and an air outlet hole, the side face is provided with a discharging hole and an air inlet hole, and the discharging hole is communicated with the air inlet hole. A flow guide pipe is installed in the discharging hole in a sealed mode, and the flow guide pipe is communicated with the feeding hole and used for discharging medium accumulated liquid making contact with the front face. An air inlet pipe is installed in the air inlet hole in a sealed mode, and the air inlet pipe is communicated with the air outlet hole and used for feeding air to purge residual media. Compared with the prior art, the flow guide pipe is communicated with the feeding hole and is used for discharging medium accumulated liquid in front contact; and the air inlet pipe is communicated with the air outlet hole and is used for feeding air to purge residual media, so that the safety risk is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field, specifically, relate to a blind plate with flow guide channel and pipeline plugging device comprising the blind plate. BACKGROUND

[0002] The blind plate is generally arranged at the equipment connection pipe port, before and after the cut-off valve or between the two flanges, and is mainly used for completely isolating the production medium to prevent material leakage due to the cut-off valve being not tightly closed from affecting production.

[0003] In the polysilicon production process, chlorosilane is the main raw material, especially trichlorosilane and dichlorosilane, which have low boiling points and are flammable and explosive. Liquid chlorosilane is very easy to evaporate in the air, which causes great trouble to the safety management of the production process. During the long-term operation of the device, there is sometimes a phenomenon that a small amount of material still leaks at the position of the cut-off valve after the cut-off valve is closed. These materials are usually flammable, explosive, toxic and harmful substances. When the blind plate is removed, the material may directly leak from the removed blind plate, which not only causes safety hazards to the operating personnel, but also causes pollution to the environment, and even fire and explosion accidents may occur. SUMMARY

[0004] The utility model solves the technical problems that when the operating personnel removes the blind plate in the polysilicon production process, the material may directly leak from the removed blind plate, which not only causes safety hazards to the operating personnel, but also causes pollution to the environment, and even fire and explosion accidents may occur.

[0005] To solve the above technical problems, according to one aspect of the utility model, a blind plate with a flow guide channel is provided, which comprises a body, the body is a circular plate structure, including a front surface, a back surface and a side surface, the front surface contacts the medium, the back surface is arranged opposite to the front surface, the front surface is circular, and the front surface and the back surface are connected through the side surface, wherein the front surface is provided with an inlet hole and an outlet hole, the side surface is provided with an outlet hole and an inlet hole, a flow guide pipe is sealingly installed in the outlet hole, the flow guide pipe is communicated with the inlet hole, and is used for discharging the medium liquid accumulated on the front surface; an inlet pipe is sealingly installed in the inlet hole, the inlet pipe is communicated with the outlet hole, and is used for purging the remaining medium.

[0006] Preferably, valves are installed on the side of the flow guide pipe and the inlet pipe away from the body, which are used for opening or cutting off the flow guide pipe and the inlet pipe.

[0007] Preferably, the valve is a needle valve.

[0008] Preferably, the distance between the inlet hole, the outlet hole and the center of the front surface is greater than 0.

[0009] Preferably, the line connecting the feeding hole and the gas outlet hole passes through the center of the front face.

[0010] Preferably, the feeding hole and the gas outlet hole are respectively arranged on two sides of the center of the front face.

[0011] Preferably, the body is made of metal.

[0012] Preferably, a flow guide pipe is welded in the discharging hole, and an air inlet pipe is welded in the air inlet hole.

[0013] Preferably, a handle is further arranged on the side face.

[0014] According to another aspect of the present application, a pipeline plugging device is provided, comprising the blind plate.

[0015] Compared with the prior art, the technical scheme provided by the embodiment of the present application can at least achieve the following beneficial effects:

[0016] First, after the flow guide blind plate is installed, if there is internal leakage on the front face of the blind plate close to the material, at this time, the side of the blind plate close to the internal leakage will accumulate liquid, the flow guide pipe is communicated with the feeding hole, and is used for discharging the accumulated liquid of the medium contacted by the front face; the air inlet pipe is communicated with the gas outlet hole, and is used for air inlet and blowing of the remaining medium, so that the safety risk is greatly reduced.

[0017] Second, the distance between the feeding hole and the gas outlet hole and the center of the front face is greater than 0, that is, the feeding hole 12 and the gas outlet hole 13 are not located at the center of the front face 11, so that the medium in the cavity of the large-size blind plate and valve is not easy to discharge. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application.

[0019] Figure 1 Fig. 1 is a perspective view of a blind plate with a backflow channel according to the present application;

[0020] Figure 2 Fig. 2 is a plan view of the blind plate shown in Fig. 1; Figure 1

[0021] Fig. 3 is a sectional view along line A-A of the blind plate shown in Fig. 1; Figure 3 Figure 2 Fig. 4 is a sectional view along line B-B of the blind plate shown in Fig. 1.

[0022] Figure 3 Fig. 5 is a sectional view along line C-C of the blind plate shown in Fig. 1. Figure 2 DETAILED DESCRIPTION​​

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of the present application.

[0024] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms "first", "second", and similar terms used in the description and claims of the present patent application do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not denote a quantity limitation, but indicate the presence of at least one.

[0025] Referring to Figures 1 to 3 The present embodiment provides a blind plate with a flow guide channel, which includes a body, a flow guide pipe 20 and an air inlet pipe 30, is usually used inside a pipeline system, is installed at a connection between two flanges, and plays a temporary sealing role.

[0026] The body is a circular plate structure, including a front face 11, a back face 15, and a side face 14, the front face 11 contacts a medium, the back face 15 is arranged opposite to the front face 11, the front face 11 and the back face 15 are both the same circular shape, and the front face 11 and the back face 15 are connected through the side face 14.

[0027] The front face 11 is provided with an inlet hole 12 and an air outlet hole 13, the distance from the inlet hole 12 and the air outlet hole 13 to the center of the front face 11 is greater than 0, that is, the inlet hole 12 and the air outlet hole 13 are not located at the center of the front face 11.

[0028] The side face 14 is provided with an outlet hole and an air inlet hole, the flow guide pipe 20 is welded in the outlet hole, the flow guide pipe 20 is communicated with the inlet hole 12, and is used for discharging medium liquid accumulated by the front face 11; the air inlet pipe 30 is welded in the air inlet hole, the air inlet pipe 30 is communicated with the air outlet hole 13, and is used for air blowing to remove residual medium. The flow guide pipe 20 and the air inlet pipe 30 are both installed with a needle valve on the side away from the body, which is used for opening or cutting off the flow guide pipe 20 and the air inlet pipe 30. The connection mode of the flow guide pipe 20 and the air inlet pipe 30 with the body is not limited to welding, but can also be other sealing connection modes. The needle valve can also be other valves. The medium here usually refers to dangerous materials, such as chlorosilane which is easy to self-ignite.

[0029] In order to facilitate the medium discharge, the passage and pipe diameter of the feeding hole and the discharging hole are designed according to the actual design. The positions of the feeding hole and the discharging hole are preferably located on the two sides of the center of the front face respectively. The line connecting the feeding hole and the discharging hole can also pass through the center of the front face.

[0030] The gas entering the gas inlet pipe is preferably nitrogen. The material of the body is metal, preferably steel. The side face 14 is further provided with a handle. The blind plate is a plate type flat blind plate or an 8-shaped blind plate. In order to facilitate the processing of the flow guide channel, the thickness of the body is greater than 8 mm.

[0031] The embodiment further provides a pipeline plugging device including the blind plate with the flow guide channel. When there is still a small amount of medium leakage after the shut-off valve is closed, the leaked medium can be discharged through the feeding hole 11 of the body 11 and the flow guide pipe 20, and finally safely guided out under the control of the needle valve, so that the blind plate with the flow guide channel is ensured to be in a safe state when it is removed.

[0032] The above only describes exemplary embodiments of the present application, and is not used to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A blind flange with a flow channel, comprising a body, the body being a circular plate structure including a front, a back, and a side, the front contacting a medium, the back being disposed opposite to the front, the front being circular, and the front and back being connected via the side, characterized in that, The front side is provided with a feed inlet and an air outlet, and the side side is provided with a discharge outlet and an air inlet. A guide pipe is sealed and installed inside the discharge outlet, and the guide pipe is connected to the feed inlet to discharge the medium liquid that is in contact with the front side. An air inlet pipe is sealed and installed inside the air inlet, and the air inlet pipe is connected to the air outlet to purge the remaining medium with air.

2. The blind plate according to claim 1, characterized in that, Valves are installed on the side of the guide pipe and the air inlet pipe away from the main body to open or close the passage of the guide pipe and the air inlet pipe.

3. The blind plate according to claim 2, characterized in that, The valve is a needle valve.

4. The blind plate according to claim 1, characterized in that, The distance between the feed hole and the air outlet and the center of the front surface is greater than 0.

5. The blind plate according to claim 4, characterized in that, The line connecting the feed port and the air outlet passes through the center of the front side.

6. The blind plate according to claim 1, characterized in that, The feed port and the air outlet are respectively located on both sides of the center of the front surface.

7. The blind plate according to claim 1, characterized in that, The body material is metal.

8. The blind plate according to claim 7, characterized in that, A guide pipe is welded inside the discharge hole, and an air inlet pipe is welded inside the air inlet hole.

9. The blind plate according to claim 1, characterized in that, A handle is also provided on the side.

10. A pipeline plugging device, characterized in that, Includes the blind plate as described in any one of claims 1 to 9.

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