Silicon chemical pulse blowback angle valve

Abstract

The invention belongs to the technical field of valves, and discloses a silicon chemical pulse blowback angle valve which comprises a self-buffering executing mechanism and an angle valve assembly, and the self-buffering executing mechanism and the angle valve assembly are fixedly connected through a spacer bush matched with a supporting bolt. The self-buffering executing mechanism comprises an air cylinder lower cover connected to one end of the spacer bush, the other end of the air cylinder lower cover is connected with an air cylinder sleeve, the other end of the air cylinder sleeve is connected with an air cylinder upper cover, and a piston is arranged in the air cylinder sleeve. The angle valve assembly comprises a valve body connected to the other end of the spacer bush, a reserved groove is formed in the end, close to the spacer bush, of the interior of the valve body, and a flow guiding device is connected into the reserved groove. When a gas-liquid two-phase medium enters the angle valve assembly, secondary speed reduction is carried out through cooperation of the outwards-extending pipeline and the flow guiding device, the problem that the gas-liquid two-phase medium rapidly scours the corrugated pipe assembly and other components in the valve body is solved, and the problem that the other components in the valve body are uneven in stress is also solved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a pulse back-blow angle valve for silicon chemical industry. Background Art

[0002] Back-blowing angle valves are widely used in filtration systems in coal chemical, polysilicon, metallurgy and other industries. They are placed on top of the filter to generate pulsed airflow to reversely clean the filter cake attached to the filter element.

[0003] The pulse back-blow angle valve is used in the polysilicon cold hydrogenation filtration back-blow system. Because it has no buffering function, it has large on-site vibration. In addition, because the silicon chemical working medium contains liquid medium, the gas-liquid two-phase medium flows and vibrates at high speed, resulting in the pulse back-blow angle valve's internal valve core and valve seat breaking, bellows leakage, resulting in internal and external leakage and failure of the angle valve assembly, thus affecting its service life. Summary of the Invention

[0004] The purpose of the present invention is to provide a silicon chemical pulse back-blowing angle valve to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pulse back-blow angle valve for silicon chemical industry, comprising a self-buffering actuator and an angle valve assembly, wherein the self-buffering actuator and the angle valve assembly are fixedly connected by a spacer bushing and a supporting bolt;

[0007] The self-buffering actuator includes a cylinder lower cover connected to one end of a spacer bushing, the other end of the cylinder lower cover is connected to a cylinder sleeve, the other end of the cylinder sleeve is connected to a cylinder upper cover, a piston is provided inside the cylinder sleeve, a compression spring is further provided between one end of the piston and the cylinder upper cover, and the other end of the piston is connected to a piston rod;

[0008] The angle valve assembly includes a valve body connected to the other end of the spacer bushing, a reserved groove is provided inside the valve body at one end near the spacer bushing, a flow guide device is connected inside the reserved groove, a bellows assembly is provided inside the flow guide device, a valve stem is provided inside the bellows assembly, the end of the valve stem near the spacer bushing is connected to the driving end of the piston rod, a guide sleeve is also provided between the spacer bushing and the valve stem, and a dust cover is also provided on the end of the guide sleeve near the spacer bushing.

[0009] Further preferably, a lower cover center through hole is provided at the center of the cylinder lower cover, and a plurality of lower cover special-shaped grooves are evenly arranged circumferentially on the end surface of the cylinder lower cover close to the piston, wherein a lower cover air hole is provided in one of the lower cover special-shaped grooves.

[0010] Further preferably, a central groove of the cylinder upper cover is provided at the center of the surface of one end close to the piston, and a plurality of special-shaped grooves of the upper cover are evenly provided around the central groove of the upper cover, and an air hole of the upper cover is provided in one of the special-shaped grooves of the upper cover.

[0011] Further preferably, a piston rod is connected through the central through hole of the lower cover, and one end of the piston rod close to the piston is connected to the limiting hole on the surface of the piston.

[0012] Further preferably, the end of the valve body away from the spacer bushing is connected to a connecting flange, and an extended pipe is also provided on the lower side of the valve body. The extended pipe has a cone-shaped structure as a whole, and the end of the valve stem away from the spacer bushing is connected to a valve core, and a valve seat is provided between the valve core and the connecting flange.

[0013] Further preferably, the guide device has an overall cylindrical structure, and the end of the guide device away from the buffer actuator is a solid structure, and the surface of the guide device other than the solid structure is uniformly provided with n small holes along the circumferential direction.

[0014] Further preferably, the flow area of ​​the flow guide device is larger than the flow channel area of ​​the valve body.

[0015] Further preferably, an annular groove is provided between the dust cover and the valve stem, and a dust ring is provided inside the annular groove.

[0016] Further preferably, a stepped cylindrical groove is provided at one end of the piston close to the cylinder upper cover, and a compression spring is provided between the small groove in the center of the cylindrical groove and the central groove of the upper cover.

[0017] Further preferably, the air holes in the lower cover and the air holes in the upper cover are both air inlet and air outlet holes.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention uses the upper cover air holes and the lower cover air holes provided on the cylinder upper cover and the cylinder lower cover, based on the gas damping principle, in the final stroke of opening and closing of the angle valve assembly, since the lower cover air holes and the upper cover air holes are both inlet and exhaust holes, and the upper cover air holes and the lower cover air holes are respectively only provided in one upper cover special-shaped groove or one lower cover special-shaped groove, the gas inside the cylinder upper cover, the cylinder lower cover and the piston cannot be discharged in time, which produces a damping effect on the piston, reduces the piston speed in the final stroke of opening / closing the angle valve assembly, thereby reducing the vibration of the angle valve assembly and protecting the valve seat and the bellows assembly.

[0020] The valve body of the present invention is also provided with an extended pipe on the lower side, and the extended pipe has an overall conical structure; a reserved groove is provided at one end of the valve body near the spacer bushing, and a flow guide device is connected to the reserved groove. After the gas-liquid two-phase medium enters the valve body through the extended pipe with a conical structure, it is decelerated for the first time. The gas-liquid two-phase medium flows circumferentially through the small holes of the flow guide device and flows evenly through the valve core, valve seat and other internal parts. When the gas-liquid two-phase medium flows through the flow guide device, it is decelerated for the second time. The flow guide device prevents the gas-liquid two-phase medium from directly rushing towards the bellows assembly, valve core, valve seat, etc., which not only solves the problem of the gas-liquid two-phase medium quickly flushing the bellows assembly and other components in the valve body, but also solves the problem of uneven force on other components in the valve body.

[0021] The dust cover on the left side of the bellows assembly of the present invention prevents the corrosive medium in the environment from corroding the bellows assembly, thereby further improving the service life of the bellows assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the silicon chemical pulse backblowing angle valve in the open state of the present invention;

[0023] Figure 2 This is a schematic diagram of the closed state of the pulse back-blowing angle valve of the silicon chemical industry of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the cylinder lower cover of the present invention;

[0025] Figure 4 For the present invention Figure 3 Schematic diagram of the AA-direction structure;

[0026] Figure 5 It is a schematic structural diagram of the cylinder upper cover of the present invention;

[0027] Figure 6 For the present invention Figure 5 Schematic diagram of the BB structure;

[0028] In the figure: 1. Self-buffering actuator; 2. Angle valve assembly; 11. Cylinder upper cover; 12. Piston; 13. Piston rod; 14. Cylinder lower cover; 15. Compression spring; 16. Cylinder sleeve; 21. Valve body; 22. Flow guide device; 23. Bellows assembly; 24. Guide sleeve; 25. Dust cover; 251. Dust ring; 26. Valve core; 27. Valve seat; 28. Connecting flange; 111. Center groove of upper cover; 112. Special-shaped groove of upper cover; 113. Air hole of upper cover; 141. Center through hole of lower cover; 142. Special-shaped groove of lower cover; 143. Air hole of lower cover. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-6 , the present invention provides a technical solution:

[0031] A pulse back-blow angle valve for silicon chemical industry, comprising a self-buffering actuator 1 and an angle valve assembly 2, wherein the self-buffering actuator 1 and the angle valve assembly 2 are fixedly connected by a spacer bushing and a supporting bolt;

[0032] The self-buffering actuator 1 includes a cylinder lower cover 14 connected to one end of a spacer bushing, the other end of the cylinder lower cover 14 is connected to a cylinder sleeve 16, the other end of the cylinder sleeve 16 is connected to a cylinder upper cover 11, a piston 12 is arranged inside the cylinder sleeve 16, a compression spring 15 is further arranged between one end of the piston 12 and the cylinder upper cover 11, and the other end of the piston 12 is connected to a piston rod 13;

[0033] The angle valve assembly 2 includes a valve body 21 connected to the other end of the spacer bushing, a reserved groove is provided inside the valve body 21 near the end of the spacer bushing, a flow guide device 22 is connected inside the reserved groove, a bellows assembly 23 is provided inside the flow guide device 22, a valve stem is provided inside the bellows assembly 23, and the end of the valve stem near the spacer bushing is connected to the driving end of the piston rod 13, a guide sleeve 24 is also provided between the spacer bushing and the valve stem, and a dust cover 25 is also provided on the end of the guide sleeve 24 near the spacer bushing.

[0034] In the present invention, a central through hole 141 is provided at the center of the cylinder lower cover 14. Multiple circumferentially uniformly arranged lower cover irregular grooves 142 are provided on the surface of the end of the cylinder lower cover 14 near the piston 12. A lower cover air hole 143 is provided within one of the irregular grooves 142. The piston rod 13 extends through the interior of the central through hole 141, and the end of the piston rod 13 near the piston 12 is connected to a stopper hole on the surface of the piston 12.

[0035] In the present invention, a central groove 111 is provided at the center of the surface of one end of the cylinder cover 11 near the piston 12. A plurality of special-shaped grooves 112 are evenly arranged around the central groove 111, one of which is provided with a cover air hole 113. A stepped cylindrical groove is provided at the end of the piston 12 near the cylinder cover 11, and a compression spring 15 is provided between the small groove at the center of the cylindrical groove and the central groove 111. The central groove 111 is used to install the circular compression spring 15. Four special-shaped grooves 112 are provided on the outside of the central groove 111, one of which is provided with a cover air hole 113. The different special-shaped grooves 112 divide the cylinder cover 11 into different areas, and an O-ring sealing groove is provided on the outer periphery of the cylinder cover 11 according to conventional treatment. A large groove outside the cylindrical groove is used to increase gas volume. A cylindrical groove is provided on the surface of piston 12 on the side away from cylinder cover 11 to increase gas volume. A cylindrical through-hole is conventionally provided in the center of piston 12 for mounting piston rod 13. A sealing ring and guide strip are conventionally designed around the outer circumference of piston 12. The large groove outside the cylindrical groove is as large as possible to achieve effective gas damping.

[0036] In the present invention, the end of the valve body 21 away from the spacer bushing is connected to a pipe flange 28. An extended pipe is also provided on the underside of the valve body 21. The extended pipe has an overall tapered structure. The end of the valve stem away from the spacer bushing is connected to a valve core 26. A valve seat 27 is provided between the valve core 26 and the pipe flange 28. The extended pipe has a fixed tapered angle of 14°.

[0037] In the present invention, the guide device 22 has an overall cylindrical structure, and the end of the guide device 22 away from the self-buffering actuator 1 is a solid structure. The surface of the guide device 22 other than the solid structure is uniformly provided with n small holes along the circumferential direction.

[0038] In the present invention, the flow area of ​​the flow guide device 22 is larger than the flow channel area of ​​the valve body 21. If the diameter of the small hole is too large, the flow velocity cannot be reduced; if the diameter of the small hole is too small, the flow resistance is too large, which affects the backflush effect.

[0039] In the present invention, an annular groove is further provided between the dust cover 25 and the valve stem, and a dust ring 251 is provided inside the annular groove.

[0040] In the present invention, the lower cover air hole 143 and the upper cover air hole 113 are both air inlet and air outlet holes.

[0041] Example: Figures 1-6 As shown, the inner diameter D of the flow guide device 22 i For example, the outer diameter D0 is φ96, the length L is 121, the solid structure L1 is 40, the diameter d of the arranged small holes is φ10, and the number n is 75.

[0042] During use, after the gas-liquid two-phase medium enters the valve body 21 through the extended pipe with a fixed cone angle of 14°, it undergoes a first deceleration. The gas-liquid two-phase medium flows circumferentially through the small holes on the surface of the flow guide device 22 and evenly flows through the valve core 26, valve seat 27 and other internal components of the valve body 21. When flowing through the flow guide device 22, the flow area of ​​the flow guide device 22 is larger than the flow channel area of ​​the valve body 21. If the diameter of the small hole is too large, the flow velocity cannot be reduced. If the diameter of the small hole is too small, the flow resistance is too large, which affects the backflushing effect. The flow guide device 22 performs a second deceleration. The flow guide device 22 prevents the gas-liquid two-phase medium from directly rushing towards the bellows assembly 23, valve core 26, valve seat 27, etc., which not only solves the problem of the gas-liquid two-phase medium quickly flushing the bellows assembly 23 and other components in the valve body 21, but also solves the problem of uneven force on other components in the valve body 21.

[0043] At the same time, through the upper cover air holes 113 and the lower cover air holes 143 set on the cylinder upper cover 11 and the cylinder lower cover 14, based on the gas damping principle, the angle valve assembly 2 is opened and closed in the final stroke. Since the lower cover air holes 143 and the upper cover air holes 113 are both air inlet and exhaust holes, and the upper cover air holes 113 and the lower cover air holes 143 are respectively only set in an upper cover special-shaped groove 112 or a lower cover special-shaped groove 142, the gas inside the cylinder upper cover 11 and the cylinder lower cover 14 and the piston 12 cannot be discharged in time, which produces a damping effect on the piston 12, reduces the speed of the piston 12 in the final opening / closing stroke of the angle valve assembly 2, and thereby reduces the vibration of the angle valve assembly 2, and protects the valve seat 27 and the bellows assembly 23.

[0044] A stepped cylindrical hole is provided at the left end of the bellows assembly 23 near the piston rod 13, into which a guide sleeve 24 and a dust cover 25 are sequentially installed. The guide sleeve 24 is made of a hard non-metallic wear-resistant material. A cylindrical through hole is provided in the center of the dust cover 25, and a circular groove is provided on the side of the cylindrical through hole. A dust ring 251 is installed in the circular groove. A bolt hole is designed above the dust cover 25 for fixing it to prevent the corrosive media in the environment from corroding the bellows assembly 23, further extending the service life of the bellows assembly 23. The above dustproof structure can also be adopted in other ways.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pulse back-blowing angle valve for silicon chemical industry, characterized in that: It comprises a self-buffering actuator (1) and an angle valve assembly (2), wherein the self-buffering actuator (1) and the angle valve assembly (2) are fixedly connected via a spacer bushing and supporting bolts; The self-buffering actuator (1) comprises a cylinder lower cover (14) connected to one end of a spacer bushing, the other end of the cylinder lower cover (14) is connected to a cylinder sleeve (16), the other end of the cylinder sleeve (16) is connected to a cylinder upper cover (11), a piston (12) is arranged inside the cylinder sleeve (16), a compression spring (15) is further arranged between one end of the piston (12) and the cylinder upper cover (11), and the other end of the piston (12) is connected to a piston rod (13); The angle valve assembly (2) includes a valve body (21) connected to the other end of the spacing bushing, a reserved groove is provided inside the valve body (21) at one end close to the spacing bushing, a flow guide device (22) is connected inside the reserved groove, a bellows assembly (23) is provided inside the flow guide device (22), a valve stem is provided inside the bellows assembly (23), the end of the valve stem close to the spacing bushing is connected to the driving end of the piston rod (13), a guide sleeve (24) is further provided between the spacing bushing and the valve stem, and a dust cover (25) is further provided on the end of the guide sleeve (24) close to the spacing bushing.

2. A pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: A lower cover center through hole (141) is provided at the center of the cylinder lower cover (14), and a plurality of lower cover special-shaped grooves (142) are evenly arranged circumferentially on an end surface of the cylinder lower cover (14) close to the piston (12), wherein a lower cover air hole (143) is provided in one of the lower cover special-shaped grooves (142).

3. A pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: The cylinder upper cover (11) is provided with an upper cover center groove (111) at the center of one end surface close to the piston (12), and a plurality of upper cover special-shaped grooves (112) are evenly arranged around the upper cover center groove (111), wherein an upper cover air hole (113) is provided in one of the upper cover special-shaped grooves (112).

4. A pulse back-blow angle valve for silicon chemical industry according to claim 2, characterized in that: A piston rod (13) is connected to the interior of the central through hole (141) of the lower cover, and one end of the piston rod (13) close to the piston (12) is connected to a limiting hole on the surface of the piston (12).

5. The pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: The end of the valve body (21) away from the spacing bushing is connected to a connecting flange (28), and an extended pipe is also provided on the lower side of the valve body (21). The extended pipe is in a cone-shaped structure as a whole. The end of the valve stem away from the spacing bushing is connected to a valve core (26), and a valve seat 27 is provided between the valve core (26) and the connecting flange (28).

6. The pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: The guide device (22) is an overall cylindrical structure, and the end of the guide device (22) away from the self-buffering actuator (1) is a solid structure. The surface of the guide device (22) other than the solid structure is uniformly provided with n small holes along the circumferential direction.

7. The pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: The flow area of ​​the flow guide device (22) is larger than the flow channel area of ​​the valve body (21).

8. The pulse back-blow angle valve for silicon chemical industry according to claim 1, characterized in that: An annular groove is further provided between the dust cover (25) and the valve stem, and a dust ring (251) is provided inside the annular groove.

9. The pulse back-blow angle valve for silicon chemical industry according to claim 3, characterized in that: A stepped cylindrical groove is provided at one end of the piston (12) close to the cylinder upper cover (11), and a compression spring (15) is provided between the small groove in the center of the cylindrical groove and the central groove (111) of the upper cover.

10. A pulse back-blow angle valve for silicon chemical industry according to any one of claims 2 or 3, characterized in that: The lower cover air hole (143) and the upper cover air hole (113) are both air inlet and air outlet holes.

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