CN214150182U

CN214150182U - Sight glass withstand voltage test auxiliary device of polycrystalline silicon reduction furnace equipment

Info

Publication number: CN214150182U
Application number: CN202022020081.5U
Authority: CN
Inventors: 朱思军; 杨依海; 肖怀铮; 张云天
Original assignee: Jiangsu Oriental Ruiji Energy Equipment Co ltd
Current assignee: Jiangsu Oriental Ruiji Energy Equipment Co ltd; Zhenjiang Dongfang Electric Heating Technology Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-09-07
Anticipated expiration: 2030-09-15

Abstract

The invention discloses a sight glass pressure resistance test auxiliary device of polycrystalline silicon reduction furnace equipment. The corrugated pipe comprises a front blind plate and a rear blind plate, wherein a shell is of a flange structure with steps, a hook ring which can be buckled at the steps is installed on the inner end face of the rear blind plate, and the front blind plate and the rear blind plate are tightened and fixed through a connecting piece, so that an independent pressure-bearing cavity is formed among a flange, a corrugated pipe and an inner cylinder; and a pressure increasing joint and a pressure relief joint which are used for being connected with a pressure source are arranged on the end surface of the outer side of the rear blind plate. The advantages are that: the labor intensity of operators is greatly reduced, the working efficiency is improved, the parts can be standard parts, the tools can be repeatedly used for many times, the production and manufacturing cost is reduced, and in addition, more importantly, the whole using process of the tool does not need welding operation, and the safety risk caused by the problem of welding quality is reduced; and the pressure test tool does not need to be removed by adopting mechanical modes such as cutting sheets and the like, so that the sight glass body and the appearance can be protected more favorably.

Description

Sight glass withstand voltage test auxiliary device of polycrystalline silicon reduction furnace equipment

Technical Field

The invention relates to a pressure test auxiliary device for accessory parts of a polycrystalline silicon reduction furnace, in particular to an auxiliary device for a sight glass pressure test of polycrystalline silicon reduction furnace equipment.

Background

Under the call of the national energy-saving emission-reducing environment-friendly concept, the new energy industries such as photovoltaic power generation and semiconductors rise rapidly, the solar cells, semiconductor separation elements and integrated circuit components of the photovoltaic power generation are all made of polycrystalline silicon, and the existing polycrystalline silicon synthesis process is mainly used for producing polycrystalline silicon products through hydrogen reduction reaction of trichlorosilane and hydrogen at 1050-1150 ℃ in a reduction furnace.

The manufacturing of the reduction furnace body and parts thereof is determined to have absolutely reliable quality assurance due to complex hydrogen reduction synthesis environments such as high temperature of polysilicon and the like, the sight glass is used as a key part of the reduction furnace bell jar, the structure is complex, the manufacturing process is strict, particularly, a front outer welding seam 1 'of a double-layer corrugated pipe with the thickness of 0.5mm is connected with a flange, a rear outer welding seam 2' of a flange of the outer shell is connected, an inner front welding seam 3 'of the flange and the inner barrel body of the sight glass is connected, and the quality of an inner rear welding seam 4' of the flange and the inner barrel body of the sight glass is qualified in the conventional permeation PT/magnetic powder MT nondestructive detection, and a pressure test is required to be carried out before the assembly of the sight glass, the inner barrel body and the outer shell body to verify the strength of the welding seam and the corrugated pipe section body.

The conventional pressure test tool is a welding structure, and welding of a pressure test tool ring is carried out every time a pressure test of a sight glass corrugated section is carried out; namely, in the pressure test of each sight glass corrugated section, a pressure test annular plate with a pressure increasing/relieving joint needs to be welded; the existing structure has the advantages that on one hand, the tool ring cannot be reused, so that the manufacturing cost of the product is increased; on the other hand, the welding process and the dismantling process of the tool ring all need to consume more labor cost, the working efficiency is seriously reduced, the integral manufacturing period of the equipment is prolonged, the integral manufacturing progress of the equipment is influenced, and the product manufacturing cost is indirectly increased; on the other hand, the tool ring and the sight glass corrugated section are welded and connected by fillet welds, and when the test pressure is higher, the welding line is cracked and hurts people or other dangers due to unconscious welding infirm; on the other hand, the tool ring is usually cut and removed by a grinding wheel, and the cutting and removing process of the welding tool can slightly and carelessly scratch the flange of the outer shell and the end part of the inner barrel of the sight glass, so that the sight glass body is damaged, and the appearance quality of the sight glass is influenced.

Disclosure of Invention

The invention solves the technical problem of providing the auxiliary device for the sight glass pressure test of the polysilicon reduction furnace equipment, which has the advantages of convenient installation and disassembly, reusability, high safety coefficient, low tool manufacturing cost and high working efficiency.

In order to solve the technical problem, the auxiliary device for the sight glass pressure test of the polysilicon reduction furnace equipment comprises a front blind plate and a rear blind plate, wherein the front blind plate is used for being positioned and installed on the front end surface of a flange, the rear blind plate is used for being positioned and installed on the rear end surface of an inner cylinder body and the rear end surface of an outer shell body; and a pressure increasing joint and a pressure relief joint which are used for being connected with a pressure source are arranged on the end surface of the outer side of the rear blind plate.

Sealing elements are arranged between the rear blind plate and the rear end face of the outer shell and between the rear blind plate and the rear end face of the inner cylinder.

The hook ring is composed of a barrel sleeve sleeved outside the shell and a limiting flange formed by inward flanging at one end of the barrel sleeve, and the limiting flange of the hook ring can be buckled at a step of the shell.

The front blind plate is provided with a front threaded hole used for being connected with the flange, and the rear blind plate is provided with a rear threaded hole used for being connected with the hook ring.

And a boss capable of being positioned in a central hole of the rear end face of the inner cylinder is arranged at the center of the end face of the inner side of the rear blind plate.

The sealing element is a nitrile rubber flat gasket.

The invention has the advantages that: the front blind plate, the rear blind plate and the hook ring arranged on the rear blind plate are connected through the connecting piece, so that the front blind plate, the rear blind plate and the hook ring can be quickly and conveniently assembled with the sight glass to form an independent pressure-bearing cavity among the flange, the corrugated pipe and the inner cylinder, the labor intensity of operators is greatly reduced, the working efficiency is improved, the parts can be standard parts, the parts can be repeatedly used for many times, the production and manufacturing cost is reduced, in addition, more importantly, the whole process of the tool does not need welding operation, and the safety risk caused by the problem of welding quality is reduced; and the pressure test tool does not need to be removed by adopting mechanical modes such as cutting sheets and the like, so that the sight glass body and the appearance can be protected more favorably.

Drawings

FIG. 1 is a schematic sectional view showing the structure of an auxiliary device for a sight glass pressure test of a polysilicon reduction furnace apparatus according to the present invention;

fig. 2 is a schematic sectional view of a hook ring according to the present invention.

Detailed Description

The auxiliary device for the sight glass pressure test of the polysilicon reduction furnace facility of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

For the reduction furnace sight glass to be tested, generally comprising an inner cylinder 3, a flange 1 installed at the front end of the inner cylinder 3 and an outer shell 4 installed at the rear end of the inner cylinder 3, wherein a double-layer corrugated pipe between the flange 1 and the outer shell 4 is further sleeved outside the inner cylinder 3, a front outer welding seam 1 'is arranged at the joint of the double-layer corrugated pipe and the flange, a rear outer welding seam 2' is connected with a flange of the outer shell, and an inner front welding seam 3 'and an inner rear welding seam 4' are arranged at the joint of the flange and the inner cylinder of the sight glass, the utility model discloses an auxiliary device for pressure test of the polysilicon sight glass for the reduction furnace, which is disclosed by the invention, comprises a front blind plate 2 for positioning and installing on the front end face of the flange 1 and a rear blind plate 5 for positioning and installing on the rear end face of the inner cylinder 3 and the rear end face of the outer shell 4, specifically, the rear blind plate 5 is provided with a sealing surface matched with the rear end surface of the inner cylinder 3 and the rear end surface of the outer cylinder 4, sealing elements 10 are respectively arranged between the sealing surface of the rear blind plate 5 and the rear end surface of the outer cylinder 4 and between the rear blind plate 5 and the rear end surface of the inner cylinder 3, the outer cylinder 4 is provided with a flange structure with steps, a hook ring 6 capable of being buckled at the step is arranged on the inner end surface of the rear blind plate 5, as can be seen from the figure, the hook ring 6 is composed of a cylinder sleeve 11 sleeved outside the outer cylinder 4 and a limit flange 12 formed by inward flanging at one end of the cylinder sleeve, the limit flange 12 of the hook ring 6 can be buckled at the step of the outer cylinder, a front threaded hole for connecting with a flange is arranged on the front blind plate 2, so that the front blind plate 2 is tightly attached with the flange 1 and then screwed by a connecting bolt, a rear threaded hole for connecting with the hook ring is arranged on the rear blind plate 5, and tandem holes capable of connecting elements corresponding to each other are arranged on the front blind plate 2 and the rear blind plate 5, the front blind plate 2 and the rear blind plate 5 are fixedly pulled after penetrating through the series connection holes through a connecting piece, so that an independent pressure-bearing cavity 7 is formed among the flange, the corrugated pipe and the inner cylinder; and a pressure increasing joint 8 and a pressure relief joint 9 which are used for being connected with a pressure source are arranged on the outer end surface of the rear blind plate 5.

Furthermore, the center of the inner end face of the rear blind plate 5 is provided with a boss 13 which can be positioned in a central hole of the rear end face of the inner cylinder, the boss 13 extends into the inner cylinder after the assembly of the rear blind plate 5 is completed to play a limiting role, during the installation, an external sealing washer (piece) is pasted on a sealing face at the corresponding position of the rear blind plate 5, an internal sealing washer (piece) is pasted on a sealing face at the boss 13 of the rear blind plate 5, the rear blind plate 5 is assembled with the corrugated pipe section, the boss 13 on the rear blind plate 5 is embedded in the inner cylinder to align and position, the internal sealing washer and the external sealing washer can be ensured to be fully contacted with the inner cylinder and a flange of the outer shell respectively, and the sealing element is preferably a nitrile rubber flat gasket.

When in installation, the front blind plate 2 and the flange 1 are connected and fixed into a whole through a connecting bolt; the finely processed rear end surface of the outer shell and the rear end surface of the inner cylinder are used as sealing surfaces and matched with the finely processed sealing surface of the rear blind plate 5, and sealing gaskets are respectively arranged between the rear end surface of the outer shell, the rear end surface of the inner cylinder and the sealing surface of the rear blind plate 5; the front blind plate 2 and the rear blind plate 5 are connected into a whole by using a tensioning bolt, and the joint of the inner cylinder and the rear blind plate 5 is sealed by tightly pressing the sealing washer by screwing a nut on the tensioning bolt; the hook ring is buckled on a flange (step) of the outer shell, the hook ring and the rear blind plate 5 are connected into a whole by using a mounting bolt, specifically, the hook ring is buckled on the outer shell from the flange of the outer shell, after the groove surface (a limiting flange 12) of the hook ring is fully contacted with the end surface of the flange of the outer shell, the mounting bolt sequentially passes through a bolt hole of the hook ring and a rear threaded hole of the rear blind plate, and the rear blind plate, the rear end surface of the outer shell and the sealing washer are tightly attached together to form a seal by screwing the mounting bolt; sequentially penetrating a tensioning bolt through the series connection holes of the front blind plate 2 and the rear blind plate 5, and tightly attaching the internal sealing washer, the rear blind plate 5 and the inner cylinder together to form a seal by screwing nuts at two ends of the tensioning bolt; a pressurizing joint 8 and a pressure relief joint 9 are welded on the rear blind plate 5, the pressurizing joint 8 and the pressure relief joint 9 are joints which can be normally connected with a pressure source, and a pressure resistance test of the corrugated section body of the reduction furnace sight glass can be realized through a pressure increasing/relieving joint connecting pipeline, wherein a mounting bolt and a connecting bolt are standard hexagon head bolts, a tensioning bolt is a standard stud bolt, and an independent pressure-bearing cavity is formed by two welding seams and two seals at the connecting part of the flange, the corrugated pipe and the inner cylinder body; after the pressure increasing/relieving connector is connected with the pressure pump, the pressure test of the reducing furnace sight glass corrugated section body can be realized to verify whether the strength of the welding seam and the strength of the corrugated section body meet the quality requirement.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims

1. A sight glass withstand voltage test auxiliary device of polycrystalline silicon reduction furnace equipment is characterized in that: the flange structure comprises a front blind plate (2) which is used for being positioned and installed on the front end face of a flange (1) and a rear blind plate (5) which is used for being positioned and installed on the rear end face of an inner barrel (3) and the rear end face of an outer shell (4), wherein the outer shell (4) is arranged to be a flange structure with steps, a hook ring (6) which can be buckled at the steps is installed on the inner end face of the rear blind plate (5), and the front blind plate (2) and the rear blind plate (5) are tightened and fixed through a connecting piece, so that an independent pressure-bearing cavity (7) is formed among the flange, a corrugated pipe and the inner barrel; and a pressurizing joint (8) and a pressure relief joint (9) which are used for being connected with a pressure source are arranged on the end face of the outer side of the rear blind plate (5).

2. The auxiliary device for the sight glass withstand voltage test of the polycrystalline silicon reduction furnace equipment according to claim 1, characterized in that: sealing elements (10) are arranged between the rear blind plate (5) and the rear end face of the outer shell (4) and between the rear blind plate (5) and the rear end face of the inner cylinder (3).

3. The auxiliary device for the sight glass withstand voltage test of the polycrystalline silicon reduction furnace equipment according to claim 1 or 2, wherein: the hook ring (6) is composed of a sleeve (11) sleeved outside the outer shell (4) and a limiting flange (12) formed by flanging one end of the sleeve, and the limiting flange (12) of the hook ring (6) can be buckled at a step of the outer shell.

4. The auxiliary device for the sight glass withstand voltage test of the polysilicon reduction furnace equipment according to claim 3, wherein: the front blind plate (2) is provided with a front threaded hole used for being connected with a flange, and the rear blind plate (5) is provided with a rear threaded hole used for being connected with a hook ring.

5. The auxiliary device for the sight glass withstand voltage test of the polycrystalline silicon reduction furnace equipment according to claim 1, 2 or 4, wherein: and a boss (13) capable of being positioned in a central hole of the rear end face of the inner cylinder is arranged at the center of the inner end face of the rear blind plate (5).

6. The auxiliary device for the sight glass withstand voltage test of the polycrystalline silicon reduction furnace equipment according to claim 2, characterized in that: the sealing element is a nitrile rubber flat gasket.