Isolation valve structure of silicon core furnace

Abstract

The utility model relates to a silicon core furnace isolating valve structure which is structurally characterized in that the inner diameter of a throat of a valve cavity is 650mm, the side face of the valve cavity is connected with a valve cover through a hinge assembly, a valve plate assembly is arranged in the valve cavity and comprises a rotary vane valve plate and a valve shaft which are connected with each other, the valve shaft is installed on the valve cavity, and the upper end of the valve shaft is connected with a valve plate driving assembly installed on the top of the valve cavity. And valve shaft sealing assemblies are respectively arranged at the upper and lower joints of the valve shaft and the valve cavity. The valve cover has the advantages that 1) the valve cover of the valve cavity of the large-size isolating valve can effectively meet the drawing requirement of a silicon core furnace; (2) the loading strength can be ensured, the phenomena of slag falling, abnormal sound and the like during opening of an original metal gasket are avoided, and the crystal pulling quality and the personnel maintenance convenience are ensured; the vacuum airtightness of the whole isolating valve cavity can be guaranteed, the dynamic sealing performance is good, a sealing ring is resistant to fatigue, the service life is long, the integrated junction box design facilitates installation and maintenance and gas-electric pipeline layout and routing, the production cost can be saved, a water inlet hose can be protected through the isolating valve plate assembly, and safety accidents and production losses are avoided.

Description

Technical Field

[0001] The utility model relates to a silicon core furnace isolation valve structure, in particular to an isolation valve structure with a throat inner diameter of 650mm for a silicon core furnace, belonging to the technical field of silicon core furnaces. Background Art

[0002] With the development of the photovoltaic industry, the global demand for multi-crystalline silicon and monocrystalline silicon has grown rapidly. As the main raw material for solar cells, multi-crystalline silicon and monocrystalline silicon are both being expanded. In the entire production process of multi-crystalline silicon and monocrystalline silicon, the amount of silicon core used is very large.

[0003] Silicon cores are mostly prepared by zone melting (mainly through high-frequency coils and seed crystal chucks to complete the drawing process). The working principle is as follows: when working, high-frequency current is passed through the high-frequency coil, and high-frequency induction heating is performed, so that the high-frequency coil generates current to generate magnetic lines of force on the raw material rod: a melting zone is formed at the end of the heated raw material rod, and then the seed crystal is inserted into the melting zone; when the end of the seed crystal is integrated with the melting zone of the raw material rod, the seed crystal is slowly lifted, and the melted raw material melt will rise with the seed crystal to form a new columnar crystal. This new columnar crystal is the finished silicon core.

[0004] In the prior art, the caliber of the silicon core furnace isolation valve cannot effectively meet the silicon core growth requirements, specifically, it cannot meet the requirements of the silicon core furnace for drawing a large number of silicon cores and the need to arrange an external lifting mechanism.

[0005] Based on this, we have designed and manufactured a large-diameter isolation valve to meet the silicon core growth space and environmental requirements of the silicon core growth furnace, ensure the smooth operation of silicon core whole rod pulling, increase crystal pulling stability, reduce production and R&D costs, and ensure a reliable structure. Utility Model Content

[0006] The utility model proposes a silicon core furnace isolation valve structure, which aims to overcome the above-mentioned deficiencies in the prior art, meet the silicon core growth space and environmental requirements of the silicon core growth furnace, ensure the smooth operation of silicon core whole rod pulling, improve crystal pulling stability, reduce production costs, and ensure structural reliability.

[0007] The technical solution of the utility model: a silicon core furnace isolation valve structure, which includes a valve cavity, a valve cover, a valve plate assembly and a valve plate drive assembly, wherein the inner diameter of the valve cavity throat is 650mm, the valve cavity side is connected to the valve cover through a hinge assembly, a valve plate assembly is arranged in the valve cavity, the valve plate assembly includes a rotary vane valve plate and a valve shaft connected to each other, the valve shaft is installed on the valve cavity and the upper end is connected to the valve plate drive assembly installed on the top of the valve cavity, and valve shaft sealing assemblies are respectively arranged at the upper and lower connections between the valve shaft and the valve cavity. The large-size isolation valve cavity valve cover with a throat inner diameter of 650mm can effectively meet the requirements of silicon core furnace drawing.

[0008] Preferably, the hinge assembly comprises a hinge part A, a valve cover shaft, a one-way thrust ball bearing and a hinge part B, wherein the hinge part A is rotatably connected with the hinge part B through the valve cover shaft, and a one-way thrust ball bearing is provided on the valve cover shaft between the hinge part A and the hinge part B. The one-way thrust ball bearing can prevent the phenomenon of slag falling and abnormal sound when the original metal gasket is opened while ensuring the load strength, thereby ensuring the quality of crystal pulling and the convenience of personnel maintenance.

[0009] Preferably, the valve shaft sealing assembly comprises a dustproof end cover and a sealing ring mounting seat connected to each other, a double-lip sealing ring is arranged in the dustproof end cover, a self-lubricating copper sleeve, a pair of star-shaped sealing rings and a double-lip sealing ring are arranged in the sealing ring mounting seat from the end close to the dustproof end cover to the other end, and a sealing ring is arranged on the step surface of the sealing ring mounting seat. The valve shaft sealing assembly can ensure a high vacuum environment during crystal pulling, and the double-lip sealing rings at both ends can ensure that silicon slag oil impurities will not enter the sealing ring mounting seat and cause wear on the valve shaft and the star-shaped sealing ring. The self-lubricating copper sleeve serves as a guide part for the valve plate drive assembly to drive the valve shaft. The star-shaped sealing ring can ensure excellent dynamic sealing performance and anti-folding performance.

[0010] Preferably, a junction box assembly is also provided on the side of the valve cavity, and the junction box assembly includes a solenoid valve mounting base plate and a solenoid valve, an optical fiber sensor amplifier and a terminal block mounted on the solenoid valve mounting base plate, and a solenoid valve protection cover is provided on the outer side of the solenoid valve mounting base plate. The integrated design is convenient for installation and maintenance, and is convenient for the layout and routing of gas and electricity pipelines, which can reduce production costs.

[0011] Preferably, the valve plate assembly comprises a rotary vane valve plate, a valve shaft and a valve arm, one end of the valve arm is connected to the middle of the valve shaft, the bottom of the valve arm is connected to the top surface of the rotary vane valve plate, a water inlet hose is mounted on the rotary vane valve plate, a valve plate inner wall support plate is provided on the rotary vane valve plate on the side of the water inlet hose, and a protective cover is provided above the water inlet hose and the valve plate inner wall support plate. The protective cover in the valve plate assembly serves as external protection, and the valve plate inner wall support plate serves as internal support, which can prevent the silicon rod from falling and damaging the water inlet hose, thereby avoiding water leakage and safety accidents.

[0012] The advantages of the utility model are: 1) The large-size isolation valve cavity and valve cover with a throat inner diameter of 650mm can effectively meet the requirements of silicon core furnace drawing;

[0013] 2) While ensuring the load strength, it can prevent the phenomenon of slag dropping and abnormal noise when the original metal gasket is opened, and ensure the quality of crystal pulling and the convenience of personnel maintenance;

[0014] 3) It can ensure the vacuum tightness of the isolation valve cavity as a whole, with excellent dynamic sealing performance, and the sealing ring is fatigue-resistant and has a long service life;

[0015] 4) The integrated junction box design is adopted to facilitate installation and maintenance as well as layout and routing of gas and electricity pipelines, which can save production costs;

[0016] 5) The isolation valve plate assembly can protect the water inlet hose from being damaged by possible falling silicon rods, thereby avoiding safety accidents and production losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the silicon core furnace isolation valve structure (hidden valve plate component) of the utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle hinge assembly.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the valve shaft sealing assembly.

[0020] Figure 4 yes Figure 1 Schematic diagram of the exploded structure of the junction box assembly.

[0021] Figure 5 It is a schematic diagram of the explosion structure of the valve plate assembly in the silicon core furnace isolation valve structure of the utility model.

[0022] In the figure, 1 is the valve cavity, 2 is the valve cover, 3 is the hinge assembly, 31 is the hinge part A, 32 is the valve cover shaft, 33 is the one-way thrust ball bearing, 34 is the hinge part B, 4 is the valve plate drive assembly, 5 is the valve shaft sealing assembly, 51 is the dustproof end cover, 52 is the self-lubricating copper sleeve, 53 is the sealing ring mounting seat, 54 is the star-shaped sealing ring, 55 is the double-lip sealing ring, 56 is the sealing ring, 6 is the junction box assembly, 61 is the solenoid valve protection cover, 62 is the solenoid valve mounting base, 63 is the solenoid valve, 64 is the optical fiber sensor amplifier, 65 is the terminal block, 71 is the protective cover shell, 72 is the rotary vane valve plate, 73 is the water inlet hose, 74 is the valve shaft, 75 is the valve arm, and 76 is the valve plate inner wall support plate. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with embodiments and specific implementation methods.

[0024] like Figure 1 , 5 As shown, a silicon core furnace isolation valve structure includes a valve cavity 1, a valve cover 2, a valve plate assembly and a valve plate drive assembly 4, wherein the inner diameter of the throat of the valve cavity 1 is 650 mm, the side of the valve cavity 1 is connected to the valve cover 2 through a hinge assembly 3, a valve plate assembly is arranged in the valve cavity 1, the valve plate assembly includes a rotary vane valve plate 72 and a valve shaft 74 connected to each other, the valve shaft 74 is installed on the valve cavity 1 and the upper end is connected to the valve plate drive assembly 4 installed on the top of the valve cavity 1, valve shaft sealing assemblies 5 are respectively arranged at the upper and lower connections between the valve shaft 74 and the valve cavity 1, and a junction box assembly 6 is also arranged on the side of the valve cavity 1.

[0025] According to the above structure, the falling of raw materials in the crystal pulling process can be controlled during operation, the crystal growth environment in the furnace can be maintained, and the crystal forming effect can be guaranteed.

[0026] like Figure 2 As shown, the hinge assembly 3 includes a hinge A portion 31, a valve cover shaft 32, a one-way thrust ball bearing 33 and a hinge B portion 34, wherein the hinge A portion 31 and the hinge B portion 34 are rotatably connected through the valve cover shaft 32, and a one-way thrust ball bearing 33 is provided on the valve cover shaft 32 between the hinge A portion 31 and the hinge B portion.

[0027] The hinge assembly 3 is used to fix and support the valve cover 2, ensuring that the valve cover 2 rotates smoothly and opens without abnormalities. The support rotation guide uses a one-way thrust ball bearing 33, which can prevent the original metal gasket from dropping slag and making abnormal noise when opening while ensuring the load strength, thereby ensuring the quality of crystal pulling and the convenience of personnel maintenance.

[0028] The valve plate driving assembly 4 includes a cylinder and a connecting assembly, which realizes the rotation of the valve shaft 74 to drive the rotation of the rotary vane valve plate 72. This is a prior art and will not be described in detail.

[0029] like Figure 3 As shown, the valve shaft sealing assembly 5 includes a dustproof end cover 51 and a sealing ring mounting seat 53 which are connected to each other. A double-lip sealing ring 55 is arranged in the dustproof end cover 51. A self-lubricating copper sleeve 52, a pair of star-shaped sealing rings 54 and a double-lip sealing ring 55 are arranged in the sealing ring mounting seat 53 from the end close to the dustproof end cover 51 to the other end. A sealing ring 56 is arranged on the step surface of the sealing ring mounting seat 53.

[0030] The valve shaft seal assembly 5 is used to ensure a high vacuum environment during crystal pulling. The double-lip seal rings 55 at both ends can ensure that silicon slag oil impurities will not enter the seal ring mounting seat 53 and cause wear on the valve shaft 74 and the star-shaped seal ring 54. The self-lubricating copper sleeve 52 serves as a guide part for the valve plate drive assembly 4 to drive the valve shaft 74. The star-shaped seal ring 510 can ensure excellent dynamic sealing performance and anti-folding performance.

[0031] like Figure 4 As shown, the junction box assembly 6 includes a solenoid valve mounting base plate 62 and a solenoid valve 63, a fiber optic sensor amplifier 64 and a terminal block 65 mounted on the solenoid valve mounting base plate 62. A solenoid valve protection cover 61 is provided on the outer side of the solenoid valve mounting base plate 62.

[0032] The integrated design of the junction box assembly 6 facilitates installation and maintenance, and is convenient for the layout and routing of gas and electricity pipelines, thereby reducing production costs.

[0033] like Figure 5As shown, the valve plate assembly includes a rotary vane valve plate 72, a valve shaft 74 and a valve arm 75. One end of the valve arm 75 is connected to the middle of the valve shaft 74, and the bottom of the valve arm 75 is connected to the top surface of the rotary vane valve plate 72. A water inlet hose 73 is installed on the rotary vane valve plate 72. A valve plate inner wall support plate 76 is provided on the rotary vane valve plate 72 on the side of the water inlet hose 73. A protective cover shell 71 is provided above the water inlet hose 73 and the valve plate inner wall support plate 76.

[0034] The protective cover shell 71 in the valve plate assembly serves as external protection, and the inner wall support plate 76 of the valve plate serves as internal support, which can prevent the silicon rod from falling and damaging the water inlet hose 73, thereby avoiding water leakage and causing safety accidents.

[0035] All the components mentioned above are prior art, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A silicon core furnace isolation valve structure, comprising a valve chamber (1), a valve cover (2), a valve plate assembly and a valve plate drive assembly (4), characterized in that: The throat inner diameter of the valve cavity (1) is 650 mm. The side of the valve cavity (1) is connected to the valve cover (2) via a hinge assembly (3). A valve plate assembly is arranged in the valve cavity (1). The valve plate assembly comprises a rotary vane valve plate (72) and a valve shaft (74) connected to each other. The valve shaft (74) is mounted on the valve cavity (1) and the upper end is connected to a valve plate drive assembly (4) mounted on the top of the valve cavity (1). Valve shaft sealing assemblies (5) are respectively arranged at the upper and lower connection points between the valve shaft (74) and the valve cavity (1).

2. A silicon core furnace isolation valve structure as claimed in claim 1, characterized in that: The hinge assembly (3) comprises a hinge A portion (31), a valve cover rotating shaft (32), a one-way thrust ball bearing (33) and a hinge B portion (34), wherein the hinge A portion (31) and the hinge B portion (34) are rotatably connected via the valve cover rotating shaft (32), and a one-way thrust ball bearing (33) is provided on the valve cover rotating shaft (32) between the hinge A portion (31) and the hinge B portion.

3. A silicon core furnace isolation valve structure as claimed in claim 1, characterized in that: The valve shaft seal assembly (5) comprises a dust cover (51) and a sealing ring mounting seat (53) which are connected to each other. A double-lip sealing ring (55) is arranged in the dust cover (51). A self-lubricating copper sleeve (52), a pair of star-shaped sealing rings (54) and a double-lip sealing ring (55) are arranged in the sealing ring mounting seat (53) from the end close to the dust cover (51) to the other end. A sealing ring (56) is arranged on the step surface of the sealing ring mounting seat (53).

4. A silicon core furnace isolation valve structure as claimed in claim 1, characterized in that: A junction box assembly (6) is also provided on the side of the valve chamber (1), and the junction box assembly (6) comprises a solenoid valve mounting base plate (62), a solenoid valve (63) mounted on the solenoid valve mounting base plate (62), an optical fiber sensor amplifier (64), and a terminal block (65), and a solenoid valve protection cover (61) is provided on the outer side of the solenoid valve mounting base plate (62).

5. A silicon core furnace isolation valve structure as claimed in claim 1, characterized in that: The valve plate assembly comprises a rotary vane valve plate (72), a valve shaft (74) and a valve arm (75), one end of the valve arm (75) is connected to the middle of the valve shaft (74), the bottom of the valve arm (75) is connected to the top surface of the rotary vane valve plate (72), a water inlet hose (73) is mounted on the rotary vane valve plate (72), a valve plate inner wall support plate (76) is provided on the rotary vane valve plate (72) on the side of the water inlet hose (73), and a protective cover shell (71) is provided above the water inlet hose (73) and the valve plate inner wall support plate (76).

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