Special jacket wear-resistant ball valve for polycrystalline silicon

Abstract

The utility model relates to a special wear-resistant jacket ball valve for polycrystalline silicon, which belongs to the technical field of valves and comprises a valve body, a valve ball, a valve rod component and a valve cover. A containing cavity suitable for containing the valve ball is formed in the valve body in a penetrating mode, and the valve rod assembly is installed on the valve body. The two valve covers are symmetrically installed on the two sides of the valve body, the valve covers are provided with channels communicated with the containing cavity, the two channels are respectively provided with a valve seat, the valve seats and the valve body are coaxially arranged, and filler grooves are formed in the channels and the outer walls of the valve seats. A first dustproof ring, a plate spring assembly, a combined sealing ring, a sealing backing ring and a second dustproof ring are sequentially installed in the packing groove from outside to inside, and the first dustproof ring and the second dustproof ring are arranged at groove openings in the two ends of the packing groove respectively. The sealing backing ring is made of nickel alloy. According to the ball valve disclosed by the utility model, the sealing performance and the stability among all components are enhanced, and the phenomenon that the ball valve is stuck is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a jacketed wear-resistant ball valve dedicated to polysilicon. Background Art

[0002] A ball valve is a fluid valve that is usually composed of a valve body, a ball core, a valve stem, and a sealing assembly. The ball core is set in the valve body, and the valve stem acts on the ball core. A through hole is set inside the ball core. By rotating the ball core, the channel can be opened and closed. The ball valve has the advantages of easy operation, low resistance, and rapid opening and closing. It is one of the most used valves in the production process of polysilicon.

[0003] The polysilicon production system has both high and low temperature environments, and the medium is highly toxic and flammable and explosive, so the polysilicon production conditions are extremely complex. Under the pneumatic ash conveying conditions, due to the high hardness and strong penetration of silicon powder in the medium, it is easy to wear and drill through the connection between the components of the ball valve, causing the ball valve to get stuck and the sealing to fail. In response to the above phenomenon, the inventor has made improvements to the ball valve in the polysilicon industry. Utility Model Content

[0004] The utility model aims to provide a special jacket wear-resistant ball valve for polysilicon in view of the problem that ball valves in the polysilicon industry are prone to getting stuck and losing their sealing performance.

[0005] The utility model provides a polysilicon-specific jacket wear-resistant ball valve, which adopts the following technical solution:

[0006] It comprises: a valve body, a valve ball and a valve stem assembly, wherein the valve body is provided with an accommodating cavity suitable for accommodating the valve ball, and the valve stem assembly is installed on the valve body;

[0007] It also includes: the valve cover is provided with two groups, the two groups of valve covers are symmetrically installed on both sides of the valve body, the valve cover is provided with a channel connected to the accommodating cavity, the two groups of channels are respectively installed with valve seats, the valve seat and the valve body are coaxially arranged, the channel and the outer wall of the valve seat form a stuffing groove, the stuffing groove is sequentially installed with a first dustproof ring, a leaf spring assembly, a combined sealing ring, a sealing gasket ring and a second dustproof ring from the outside to the inside, the first dustproof ring and the second dustproof ring are respectively arranged at the notches at both ends of the stuffing groove; the sealing gasket ring is made of nickel alloy.

[0008] Preferably, the filling groove is stepped, and two sides of the leaf spring assembly respectively abut against the side walls of the first dustproof ring and the combined sealing ring.

[0009] Preferably, the combined sealing ring includes a wire braided graphite pad and a pure graphite filler pad, the wire braided graphite pads are provided in at least two groups, the pure graphite filler pads are provided in at least three groups, the pure graphite filler pads are located between the two groups of wire braided graphite pads, and the wire braided graphite pads located on both sides of the pure graphite filler pads are respectively abutted against the side walls of the sealing gasket ring and the leaf spring assembly.

[0010] Preferably, the leaf spring assembly comprises a leaf spring gasket, a leaf spring body and a leaf spring compression ring, wherein the leaf spring body is located between the leaf spring gasket and the leaf spring compression ring. The leaf spring gasket abuts against the side wall of the first dustproof ring, and the leaf spring compression ring abuts against the side wall of the wire braided graphite gasket.

[0011] Preferably, the valve stem assembly comprises a stuffing box and a valve shaft, the stuffing box is installed on the valve body, the stuffing box is provided with an axial cavity for installing the valve shaft, the cavity wall of the axial cavity is provided with a sealing groove penetrating to the top of the stuffing box, the sealing groove is provided with a sealing packing, at least two groups of the sealing packing are provided, a packing spacer ring is provided between each two adjacent groups of the sealing packing, and a packing gland partially embedded in the sealing groove is installed on the top of the stuffing box;

[0012] The cavity wall of the shaft cavity is provided with a dustproof groove which penetrates to the bottom end of the stuffing box, and the dustproof groove is provided with a third dustproof ring.

[0013] Preferably, a shaft sleeve sleeved on the valve shaft is arranged inside the packing gland;

[0014] The valve body is provided with a rod hole adapted to the valve shaft, one end of the valve shaft passing through the rod hole is connected to the valve ball, a bearing sleeved on the valve shaft is arranged in the rod hole, and a shaft gasket is arranged between the bearing and the stuffing box.

[0015] Preferably, the valve ball is provided with an axis groove for installing the valve shaft, and the valve shaft and the axis groove wall are connected by a cylindrical pin.

[0016] Preferably, a bushing is provided at one end of the channel away from the valve seat, one end of the bushing abuts against the end wall of the valve seat, and the other end of the bushing is provided with an outward-turned portion extending out of the channel, and the outward-turned portion abuts against the end wall of the valve cover;

[0017] The inner surfaces of the bushing, valve seat and valve ball are all sprayed with an alloy layer.

[0018] Preferably, the side walls of the two groups of valve covers are respectively provided with connecting holes, one end of the connecting holes in the channel is located at the connecting seam between the bushing and the valve cover, and one end of the two groups of connecting holes located on the side walls of the valve cover are commonly connected to a sensor catheter, the sensor catheter is installed with a sensor connector, and the sensor connector is installed with an alarm sensor.

[0019] Preferably, the thickness of the alloy layer located on the inner surface of the bushing is smaller than the thickness of the alloy layer located on the inner surfaces of the valve seat and the valve ball.

[0020] In summary, the utility model includes the following beneficial technical effects:

[0021] The closure of the valve body is fixedly mounted on the valve body, and the valve seat is mounted in the channel of the closure. The connecting parts of the valve seat and the closure are respectively provided with packing grooves. The packing grooves are sequentially installed with a first dustproof ring, a leaf spring assembly, a combined sealing ring, a sealing gasket ring and a second dustproof ring from the outside to the inside. The leaf spring assembly provides thrust to the valve seat, and the valve seat can be sealed and fitted on the spherical surface of the valve ball, and ensures the normal rotation of the valve ball. The first dustproof ring and the second dustproof ring located at the notches on both sides of the packing groove play a role in blocking the medium, so as to protect the leaf spring assembly. The sealing gasket ring is made of nickel alloy, and the linear expansion coefficient of the sealing gasket ring is stable under high temperature, so as to support the valve seat and prevent the valve seat from being stuck. The combined sealing ring enhances the sealing between the valve seat and the closure. The ball valve in the utility model reduces the phenomenon of its being stuck under complex working conditions, and improves the sealing and stability between the various components of the ball valve.

[0022] 2. By arranging a sealing stuffing pad and a third dustproof ring in the shaft cavity of the stuffing box, and arranging a bearing at the rod hole, and utilizing the combination of the third dustproof ring, the sealing stuffing pad and the bearing, the dustproof function of the valve stem assembly is enhanced, which can effectively reduce the jamming of the valve shaft.

[0023] 3. By installing a packing gland on the top of the stuffing box and installing a sleeve on the valve shaft inside the packing gland, the sleeve supports the valve shaft and prevents the medium from penetrating into the shaft cavity due to the valve shaft's own skew, thereby causing the valve shaft to get stuck.

[0024] 4. By spraying an alloy layer on the inner surface of the bushing, valve seat and valve ball to enhance the wear resistance of the inside of the ball valve, the two sets of valve covers are respectively provided with connecting holes, and the two sets of connecting holes are commonly connected to a set of sensor ducts equipped with alarm sensors. When the alloy layer on the inner surface of the bushing is severely worn, the pressure in the ball valve will pass through the connection between the bushing and the valve seat and enter the sensor duct, and then the alarm sensor will start to alarm, providing staff with the opportunity to repair the ball valve in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional structure diagram of a polysilicon-specific jacketed wear-resistant ball valve provided in an embodiment of the utility model;

[0026] Figure 2 yes Figure 1Schematic diagram of the structure of the middle A area;

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle B area;

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle C area;

[0029] Figure 5 The utility model is a structural schematic diagram of a polysilicon-specific jacketed wear-resistant ball valve.

[0030] Description of the reference numerals: 1. valve body; 11. accommodating cavity; 12. rod hole; 121. bearing; 122. shaft gasket; 2. valve ball; 21. shaft groove; 211. cylindrical pin; 3. valve stem assembly; 31. stuffing box; 311. shaft cavity; 312. sealing groove; 313. sealing stuffing; 314. stuffing spacer; 315. stuffing gland; 316. shaft sleeve; 317. dustproof groove; 318. third dustproof ring; 32. valve shaft; 4. valve cover; 41. Channel; 42, connecting hole; 5, valve seat; 51, stuffing groove; 52, first dust ring; 53, leaf spring assembly; 531, leaf spring gasket; 532, leaf spring body; 533, leaf spring pressure ring; 54, combined sealing ring; 541, wire braided graphite gasket; 542, pure graphite stuffing gasket; 55, sealing gasket ring; 56, second dust ring; 6, bushing; 61, outward turning part; 62, alloy layer; 7, sensor catheter; 8, sensor connector; 9, alarm sensor. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 The utility model is described in further detail.

[0032] The utility model discloses a polysilicon-specific jacket wear-resistant ball valve. Figure 1 and Figure 2 , comprising a valve body 1, a valve ball 2, a valve stem assembly 3 and a valve cover 4. The valve body 1 is provided with an accommodating cavity 11 suitable for accommodating the valve ball 2, the valve stem assembly 3 is installed on the valve body 1, and the valve stem assembly 3 acts on the valve ball 2; the valve cover 4 is provided with two groups in a symmetrical relationship, the two groups of valve covers 4 are respectively connected to the opposite sides of the valve body 1 by fastening bolts, the valve cover 4 is provided with a channel 41 connected to the accommodating cavity 11, the channels 41 of the two groups of valve covers 4 are respectively installed with valve seats 5, the two groups of valve seats 5 are in a symmetrical relationship, and the valve seats 5 and the valve body 1 are in a coaxial state, the two groups of valve seats 5 are respectively abutted against the spherical surface of the valve ball 2, the channel 41 of the valve cover 4 and the outer wall of the valve seat 5 form a packing groove 51, and the packing groove 51 is sequentially installed with a first dust ring 52, a leaf spring assembly 53, a combined sealing ring 54, a sealing gasket ring 55 and a second dust ring 56 from the outside to the inside.

[0033] Reference Figure 1 and Figure 2 The packing groove 51 is stepped, and the two sides of the leaf spring assembly 53 are respectively in contact with the side walls of the first dustproof ring 52 and the combined sealing ring 54. The leaf spring assembly 53 provides thrust to the valve seat 5, so that the valve seat 5 can be sealed and fitted to the spherical surface of the valve ball 2; the first dustproof ring 52 and the second dustproof ring 56 are respectively arranged at the notches at both ends of the packing groove 51 to block the medium, reduce the phenomenon of the medium entering the packing groove 51, and protect the leaf spring assembly 53. In this embodiment, the first dustproof ring 52 and the second dustproof ring 56 are preferably braided graphite rope rings; the sealing gasket ring 55 is made of nickel alloy. Since the polysilicon production system has both high and low temperature environments, the sealing gasket ring 55 made of nickel alloy has a stable linear expansion coefficient under high temperature conditions, thereby being able to support the valve seat 5 and prevent the valve seat 5 from being stuck; the combined sealing ring 54 improves the sealing performance of the connection between the valve seat 5 and the valve cover 4.

[0034] Reference Figure 1 and Figure 2 The leaf spring assembly 53 includes a leaf spring gasket 531, a leaf spring body 532 and a leaf spring compression ring 533. The leaf spring body 532 is located between the leaf spring gasket 531 and the leaf spring compression ring 533, and the leaf spring gasket 531 abuts against the side wall of the first dust ring 52, and the leaf spring compression ring 533 abuts against the side wall of the combined sealing ring 54. The combined sealing ring 54 includes a wire braided graphite gasket 541 and a pure graphite filler gasket 542. The wire braided graphite gasket 541 and the pure graphite filler gasket 542 are two types of gaskets in the prior art. At least two groups of the wire braided graphite gasket 541 are provided. In this embodiment, the wire braided graphite gasket 541 is optimally provided with two groups. At least three groups of the pure graphite filler gasket 542 are provided. In this embodiment, the pure graphite filler gasket 542 is optimally provided with three groups. The three groups of pure graphite filler gaskets 542 are located between the two groups of wire braided graphite gaskets 541 to improve the sealing and strength of the combined sealing ring 54. The two groups of wire braided graphite gaskets 541 are respectively abutted against the side walls of the sealing gasket ring 55 and the leaf spring compression ring 533. The provision of the combined sealing ring 54 improves the sealing between the valve cover 4 and the valve seat 5. The combined sealing ring 54 in this embodiment has reliable sealing and stability.

[0035] Reference Figure 1 and Figure 3The valve stem assembly 3 includes a stuffing box 31 and a valve shaft 32. The stuffing box 31 is connected to the valve body 1 by fastening bolts. The stuffing box 31 is provided with an axial cavity 311 for installing the valve shaft 32. The cavity wall of the axial cavity 311 is provided with a sealing groove 312 that penetrates to the top of the stuffing box 31. A sealing packing 313 is placed in the sealing groove 312. There are at least two groups of sealing packings 313. In this embodiment, the sealing packings 313 are preferably provided with two groups, and a packing spacer ring 314 is provided between each two adjacent groups of sealing packings 313; a stuffing gland 315 partially embedded in the sealing groove 312 is installed at the top of the stuffing box 31. The stuffing gland 315 is located at one end of the sealing groove 312 and abuts against the surface of the sealing packing 313, and the stuffing gland 315 is connected to the top of the stuffing box 31 by fastening bolts. The stuffing gland 315 compacts and fixes the sealing packing 313.

[0036] Reference Figure 1 and Figure 4 A shaft sleeve 316 is arranged inside the packing gland 315 and is sleeved on the valve shaft 32. When the valve shaft 32 is skewed, a large gap will be formed between the valve shaft 32 and the shaft cavity 311, thereby causing the medium to penetrate into the shaft cavity 311. The shaft sleeve 316 supports the valve shaft 32 to avoid the medium penetrating into the shaft cavity 311 and causing the valve shaft 32 to get stuck. The cavity wall of the shaft cavity 311 is provided with a dustproof groove 317 which penetrates to the bottom end of the stuffing box 31. The dustproof groove 317 is provided with a third dustproof ring 318. The third dustproof ring 318 in this embodiment is preferably a braided graphite rope ring; the valve body 1 is provided with a rod hole 12 adapted to the valve shaft 32. One end of the valve shaft 32 passing through the rod hole 12 is connected to the valve ball 2. The surface of the valve ball 2 is provided with an axis groove 21 for installing the valve shaft 32. One end of the valve shaft 32 located in the axis groove 21 is connected to the axis groove 21 with a cylindrical pin 211. The rod hole 12 is fixedly installed with a bearing 121 sleeved on the valve shaft 32, and a shaft gasket 122 is provided between the bearing 121 and the stuffing box 31; the third dustproof ring 318 and the sealing packing 313 (such as Figure 3 ) and the bearing 121 enhances the dustproof function of the valve stem assembly 3 and can effectively reduce the stuck phenomenon of the valve shaft 32.

[0037] Reference Figure 1 and Figure 5 A bushing 6 is fixedly installed at one end of the channel 41 in the valve cover 4 away from the valve seat 5, one end of the bushing 6 abuts against the end wall of the valve seat 5, and the other end of the bushing 6 is provided with an outward-turned portion 61 extending out of the channel 41, and the outward-turned portion 61 abuts against the end wall of the valve cover 4; the inner surfaces of the bushing 6, the valve seat 5 and the valve ball 2 are all sprayed with an alloy layer 62, and the alloy layer 62 in this embodiment is preferably selected as FSLLOY16 hard alloy, so as to enhance the hardness of the inner surface of the ball valve.

[0038] Reference Figure 1 and Figure 5 , the side walls of the two groups of valve covers 4 are respectively provided with connection holes 42, which penetrate to the inner surface of the valve cover 4 located in the channel 41, and one end of the connection hole 42 in the channel 41 is located at the connection seam between the bushing 6 and the channel 41, and the two groups of connection holes 42 are located at one end of the side wall of the valve cover 4 and are connected to a sensor conduit 7, and the sensor conduit 7 is installed with a sensor joint 8, and the sensor joint 8 is installed with an alarm sensor 9. The alarm sensor 9 in this embodiment is a pressure transmitter. When the alloy layer 62 on the inner surface of the bushing 6 is seriously worn, the bushing 6 will be worn, and the ball valve will lose pressure. The gas will pass through the connection gap between the bushing 6 and the valve cover 4 and enter the sensor conduit 7, and then the alarm sensor 9 will start to alarm, reminding the staff to repair the ball valve in time. In addition, the thickness of the alloy layer 62 on the inner surface of the bushing 6 is less than the thickness of the alloy layer 62 on the inner surface of the valve seat 5 and the valve ball 2, that is, the alloy layer 62 on the inner surface of the bushing 6 is more easily worn, so that it can play a role of timely alarm.

[0039] The implementation principle of a polysilicon-specific jacketed wear-resistant ball valve according to the utility model embodiment is as follows:

[0040] The connecting parts of the valve seat 5 and the valve cover 4 are respectively provided with packing grooves 51, and the first dust ring 52, the leaf spring assembly 53, the combined sealing ring 54, the sealing gasket ring 55 and the second dust ring 56 are installed in sequence from the outside to the inside of the packing groove 51. The leaf spring assembly 53 provides thrust to the valve seat 5, so that the valve seat 5 can be sealed and fitted to the spherical surface of the valve ball 2. The first dust ring 52 and the second dust ring 56 located at the notches on both sides of the packing groove 51 have a blocking effect on the medium, so as to protect the leaf spring assembly 53. The sealing gasket ring 55 is made of nickel alloy. The linear expansion coefficient of the sealing gasket ring 55 is stable under high temperature conditions, which can support the valve seat 5 and prevent the valve seat 5 from being stuck. The combined sealing The ring 54 enhances the sealing between the valve seat 5 and the valve cover 4; and by installing the bearing 121, the third dust ring 318 and the sealing packing 313 pad in the valve stem assembly 3 from the inside to the outside in sequence, the sealing between the stuffing box 31 and the valve shaft 32 is improved; by spraying the alloy layer 62 on the inner surface of the bushing 6, the valve cover 4 and the valve ball 2, the wear resistance of the inside of the ball valve is enhanced, and the sensor conduit 7 with the alarm sensor 9 is connected to the connecting hole 42 of the valve cover 4. When the alloy layer 62 on the inner surface of the bushing 6 is severely worn, the pressure in the ball valve will pass through the connection between the bushing 6 and the valve cover 4 and enter the sensor conduit 7, and then the alarm sensor 98 starts to alarm, providing the staff with a timely maintenance of the ball valve.

[0041] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A jacketed wear-resistant ball valve for polysilicon, comprising: A valve body (1), a valve ball (2) and a valve stem assembly (3), wherein the valve body (1) is provided with an accommodating cavity (11) suitable for accommodating the valve ball (2), and the valve stem assembly (3) is mounted on the valve body (1); It is characterized by further comprising: A valve cover (4), wherein the valve cover (4) is provided with two groups, and the two groups of the valve covers (4) are symmetrically installed on both sides of the valve body (1), the valve cover (4) is provided with a channel (41) connected to the accommodating cavity (11), and the two groups of the channels (41) are respectively installed with a valve seat (5), the valve seat (5) and the valve body (1) are coaxially arranged, and the outer wall of the channel (41) and the valve seat (5) forms a stuffing groove (51), and the stuffing groove (51) is sequentially installed with a first dustproof ring (52), a leaf spring assembly (53), a combined sealing ring (54), a sealing gasket ring (55) and a second dustproof ring (56) from the outside to the inside, and the first dustproof ring (52) and the second dustproof ring (56) are respectively arranged at the notches at both ends of the stuffing groove (51); the material of the sealing gasket ring (55) is nickel alloy.

2. The polysilicon-specific jacketed wear-resistant ball valve according to claim 1, characterized in that: The filling groove (51) is in a stepped shape, and two sides of the leaf spring assembly (53) respectively contact the side walls of the first dustproof ring (52) and the combined sealing ring (54).

3. The polysilicon-specific jacketed wear-resistant ball valve according to claim 2, characterized in that: The combined sealing ring (54) comprises a wire braided graphite pad (541) and a pure graphite filler pad (542), wherein at least two groups of the wire braided graphite pad (541) are provided, and at least three groups of the pure graphite filler pad (542) are provided, wherein the pure graphite filler pad (542) is located between the two groups of wire braided graphite pads (541), and the wire braided graphite pads (541) located on both sides of the pure graphite filler pad (542) are respectively in contact with the side walls of the sealing gasket ring (55) and the leaf spring assembly (53).

4. The polysilicon-specific jacketed wear-resistant ball valve according to claim 3, characterized in that: The leaf spring assembly (53) comprises a leaf spring gasket (531), a leaf spring body (532) and a leaf spring compression ring (533); the leaf spring body (532) is located between the leaf spring gasket (531) and the leaf spring compression ring (533); the leaf spring gasket (531) abuts against the side wall of the first dustproof ring (52); and the leaf spring compression ring (533) abuts against the side wall of the wire braided graphite gasket (541).

5. The polysilicon-specific jacketed wear-resistant ball valve according to claim 1, characterized in that: The valve stem assembly (3) comprises a stuffing box (31) and a valve shaft (32); the stuffing box (31) is mounted on the valve body (1); the stuffing box (31) is provided with an axial cavity (311) for mounting the valve shaft (32); the cavity wall of the axial cavity (311) is provided with a sealing groove (312) extending through the top of the stuffing box (31); the sealing groove (312) is provided with a sealing stuffing (313); at least two groups of the sealing stuffing (313) are provided; a stuffing spacer ring (314) is provided between each two adjacent groups of the sealing stuffing (313); and a stuffing gland (315) partially embedded in the sealing groove (312) is installed at the top of the stuffing box (31); The cavity wall of the shaft cavity (311) is provided with a dustproof groove (317) penetrating to the bottom end of the stuffing box (31), and the dustproof groove (317) is provided with a third dustproof ring (318).

6. The polysilicon-specific jacketed wear-resistant ball valve according to claim 5, characterized in that: The packing gland (315) is provided with a shaft sleeve (316) sleeved on the valve shaft (32); The valve body (1) is provided with a rod hole (12) adapted to the valve shaft (32); one end of the valve shaft (32) passes through the rod hole (12) and is connected to the valve ball (2); a bearing (121) sleeved on the valve shaft (32) is arranged in the rod hole (12); a shaft gasket (122) is arranged between the bearing (121) and the stuffing box (31).

7. The polysilicon-specific jacketed wear-resistant ball valve according to claim 6, characterized in that: The valve ball (2) is provided with an axis groove (21) for installing a valve shaft (32), and a cylindrical pin (211) is connected between the valve shaft (32) and the groove wall of the axis groove (21).

8. The polysilicon-specific jacketed wear-resistant ball valve according to claim 1, characterized in that: A bushing (6) is provided at one end of the channel (41) away from the valve seat (5), one end of the bushing (6) abuts against the end wall of the valve seat (5), and the other end of the bushing (6) is provided with an outward-turned portion (61) extending out of the channel (41), and the outward-turned portion (61) abuts against the end wall of the valve cover (4); The inner surfaces of the bushing (6), the valve seat (5) and the valve ball (2) are all spray-coated with an alloy layer (62).

9. The polysilicon-specific jacketed wear-resistant ball valve according to claim 8, characterized in that: The side walls of the two groups of valve covers (4) are respectively provided with connection holes (42), one end of the connection holes (42) in the channel (41) is located at the connection seam between the bushing (6) and the valve cover (4), and one end of the two groups of connection holes (42) located on the side walls of the valve cover (4) is commonly connected to a sensor conduit (7), the sensor conduit (7) is installed with a sensor connector (8), and the sensor connector (8) is installed with an alarm sensor (9).

10. The polysilicon-specific jacketed wear-resistant ball valve according to claim 8, characterized in that: The thickness of the alloy layer (62) located on the inner surface of the bushing (6) is smaller than the thickness of the alloy layer (62) located on the inner surfaces of the valve seat (5) and the valve ball (2).

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