Special pneumatic super-wear-resistant cut-off valve for polycrystalline silicon

Abstract

The utility model belongs to the technical field of cut-off valves, particularly relates to a pneumatic super-wear-resistant cut-off valve special for polycrystalline silicon, and aims to solve the problem that in the prior art, in the polycrystalline silicon conveying process, after cut-off is carried out through a cut-off plate, the sealing performance is low due to a gap between the cut-off plate and an inner cavity of a valve body, and the following scheme is provided: the pneumatic super-wear-resistant cut-off valve comprises a valve body, a convex groove is formed in the valve body, a valve rod is rotationally connected into the convex groove, a cut-off plate is fixedly connected to the bottom end of the valve rod, a reset cavity is formed in the valve body, an inlet pipe and an outlet pipe are arranged on the two sides of the valve body respectively, a controller is arranged on the outlet pipe, a connector is arranged at one end of the outlet pipe, and two protection boxes and two contraction boxes are fixedly arranged in the outlet pipe. And a quantity control assembly is arranged in the outlet pipe. The stop valve is simple in structure, and can seal the cut-off plate and the valve body after the valve body is cut off by the cut-off plate, so that the sealing performance is improved, and the stop valve is convenient for people to use.

Description

Technical Field

[0001] The utility model relates to the technical field of cut-off valves, in particular to a pneumatic super-wear-resistant polysilicon special cut-off valve. Background Art

[0002] Pneumatic shut-off valves all have the function of rapid shut-off, and have the characteristics of simple structure, sensitive response, reliable operation, etc. At present, a pneumatic ultra-wear-resistant polysilicon-specific shut-off valve is used in the process of transporting polysilicon in pipelines, and most of its shut-off valves rely on a shut-off block to realize the shut-off operation of polysilicon.

[0003] In the prior art, during the polysilicon transportation process, after being cut by a cutting plate, the sealing performance is low due to the gap between the cutting plate and the inner cavity of the valve body. Utility Model Content

[0004] The utility model aims to solve the disadvantage of low sealing performance due to the gap between the cutting plate and the inner cavity of the valve body in the prior art during the polysilicon transportation process after the cutting is carried out by the cutting plate, and proposes a pneumatic super wear-resistant polysilicon special cutting valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pneumatic super wear-resistant polysilicon special cut-off valve comprises a valve body, a convex groove is provided in the valve body, a valve stem is rotatably connected in the convex groove, a cut-off plate is fixedly connected to the bottom end of the valve stem, a reset chamber is provided in the valve body, an inlet pipe and an outlet pipe are respectively provided on both sides of the valve body, a controller is provided on the outlet pipe, a connector is provided at one end of the outlet pipe, two protection boxes and two contraction boxes are fixedly provided in the outlet pipe, a quantity control component is provided in the outlet pipe, and a sealing mechanism is provided in the valve body.

[0007] Preferably, the volume control component includes two electric push rods, which are respectively fixed in two protective boxes, one end of the two electric push rods is fixedly connected to a push plate, the two push plates are hinged with connecting rods, one end of the two connecting rods is hinged with slides, the two slides are respectively slidably connected to the two contraction boxes, and the bottom ends of the two slides are fixedly connected to a volume control plate.

[0008] Preferably, the sealing mechanism includes a spring plate, which is arranged in the reset chamber, the bottom end of the spring plate is fixedly connected to a sealing frame, one end of the spring plate is fixedly connected to a rack, a cam is fixedly connected to the valve stem, the cam is fitted with the rack, a screw is rotatably connected in the reset chamber, a gear is fixedly connected to the screw, the gear is meshed with the rack, a drag plate is threadedly connected to the screw, one end of the drag plate is fixedly connected to a sealing sleeve, and the sealing sleeve slides on the valve stem.

[0009] Compared with the prior art, the advantages of the utility model are:

[0010] (1) In this scheme, the two slide plates drive the two control plates to move closer to each other, thereby adjusting the discharge amount of the outlet pipe;

[0011] (2) In this solution, the valve stem drives the cam to rotate and moves the raised portion of the cam away from the rack, thereby releasing the elastic force of the spring plate and driving the sealing frame to approach the cut-off plate to seal between the valve body and the cut-off plate.

[0012] The utility model has a simple structure and can seal the cutting plate and the valve body after the cutting plate cuts off the valve body, thereby improving the sealing performance and being convenient for people to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a pneumatic ultra-wear-resistant polysilicon special cut-off valve proposed by the utility model;

[0014] Figure 2 The utility model proposes a pneumatic ultra-wear-resistant polysilicon special cut-off valve Figure 1 Schematic diagram of the structure of part A in FIG.

[0015] Figure 3 The utility model proposes a pneumatic ultra-wear-resistant polysilicon special cut-off valve Figure 1 Schematic diagram of the structure of part B;

[0016] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of a cut-off plate of a pneumatic super-wear-resistant polysilicon special cut-off valve.

[0017] In the figure: 1. valve body; 2. convex groove; 3. valve stem; 4. cut-off plate; 5. reset chamber; 6. outlet pipe; 7. controller; 8. connector; 9. protection box; 10. contraction box; 11. electric push rod; 12. push plate; 13. connecting rod; 14. slide plate; 15. volume control plate; 16. spring plate; 17. sealing frame; 18. rack; 19. cam; 20. screw; 21. gear; 22. drag plate; 23. sealing sleeve. DETAILED DESCRIPTION

[0018] The technical solution of this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, rather than all of the embodiments.

[0019] Embodiment 1

[0020] Reference Figure 1-Figure 4A pneumatic super wear-resistant polysilicon special cut-off valve comprises a valve body 1, a convex groove 2 is provided in the valve body 1, a valve stem 3 is rotatably connected in the convex groove 2, a cut-off plate 4 is fixedly connected to the bottom end of the valve stem 3, a reset chamber 5 is provided in the valve body 1, an inlet pipe and an outlet pipe 6 are respectively provided on both sides of the valve body 1, a controller 7 is provided on the outlet pipe 6, a connector 8 is provided at one end of the outlet pipe 6, two protection boxes 9 and two contraction boxes 10 are fixedly provided in the outlet pipe 6, a quantity control component is provided in the outlet pipe 6, and a sealing mechanism is provided in the valve body 1.

[0021] In this embodiment, the quantity control component includes two electric push rods 11, and the two electric push rods 11 are respectively fixed in two protective boxes 9. One end of the two electric push rods 11 is fixedly connected to a push plate 12, and the two push plates 12 are hinged with connecting rods 13. One end of the two connecting rods 13 is hinged with a slide plate 14. The two slide plates 14 are respectively slidably connected to the two contraction boxes 10, and the bottom ends of the two slide plates 14 are fixedly connected to a quantity control plate 15.

[0022] In this embodiment, the sealing mechanism includes a spring plate 16, which is arranged in the reset chamber 5. The bottom end of the spring plate 16 is fixedly connected to a sealing frame 17, one end of the spring plate 16 is fixedly connected to a rack 18, a cam 19 is fixedly connected to the valve stem 3, the cam 19 is fitted with the rack 18, a screw 20 is rotatably connected in the reset chamber 5, a gear 21 is fixedly connected to the screw 20, the gear 21 is meshed with the rack 18, a drag plate 22 is threadedly connected to the screw 20, one end of the drag plate 22 is fixedly connected to a sealing sleeve 23, and the sealing sleeve 23 slides on the valve stem 3.

[0023] In this embodiment, the controller 7 is used to drive two electric push rods to drive two push plates 12 to move. The two push plates 12 drive two slide plates 14 to approach each other through two connecting rods 13. The two slide plates 14 drive two control plates 15 to approach each other, thereby adjusting the discharge amount of the outlet pipe 6. The valve stem 3 drives the cutting plate 4 to rotate for cutting. At the same time, the valve stem 3 drives the cam 19 to rotate, and makes the raised part of the cam 19 away from the rack 18, so that the spring plate 16 releases the elastic force, drives the sealing frame 17 to approach the cutting plate 4 to seal between the valve body 1 and the cutting plate 4, and at the same time, the rack 18 drives the screw 20 to rotate through the gear 21, and the screw 20 drives the sealing sleeve 23 to move downward through the drag plate 22 to seal the convex groove 2.

[0024] Embodiment 2

[0025] In this embodiment, the outlet pipe 6 and the inlet pipe are both covered with protective sleeves, and a cotton body is arranged inside the protective sleeves.

[0026] The difference between this embodiment and the first embodiment is that when the temperature is below zero in winter, the cotton body in the protective cover can prevent the outlet pipe 6 and the inlet pipe from freezing. All structures in this application can be selected in terms of material and length according to actual usage. The accompanying drawings are all schematic structural diagrams, and the specific actual dimensions can be appropriately adjusted.

[0027] The above is only a preferred specific implementation of this embodiment, but the protection scope of this embodiment is not limited to this. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of this embodiment within the technical scope disclosed in this embodiment, which should be covered by the protection scope of this embodiment.

Claims

1. A pneumatic ultra-wear-resistant polysilicon-specific cut-off valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a convex groove (2), a valve stem (3) is rotatably connected in the convex groove (2), a cut-off plate (4) is fixedly connected to the bottom end of the valve stem (3), a reset chamber (5) is provided in the valve body (1), an inlet pipe and an outlet pipe (6) are respectively provided on both sides of the valve body (1), a controller (7) is provided on the outlet pipe (6), a connector (8) is provided at one end of the outlet pipe (6), two protection boxes (9) and two contraction boxes (10) are fixedly provided in the outlet pipe (6), a volume control component is provided in the outlet pipe (6), and a sealing mechanism is provided in the valve body (1).

2. A pneumatic ultra-wear-resistant polysilicon-specific cut-off valve according to claim 1, characterized in that: The control assembly comprises two electric push rods (11), the two electric push rods (11) are respectively fixedly arranged in two protective boxes (9), one end of the two electric push rods (11) is fixedly connected to a push plate (12), the two push plates (12) are hinged with a connecting rod (13), and one end of the two connecting rods (13) is hinged with a slide plate (14).

3. A pneumatic ultra-wear-resistant polysilicon-specific cut-off valve according to claim 2, characterized in that: The two slide plates (14) are slidably connected to the two shrink boxes (10) respectively, and the bottom ends of the two slide plates (14) are fixedly connected to a volume control plate (15).

4. The pneumatic ultra-wear-resistant polysilicon-specific cut-off valve according to claim 1 is characterized in that: The sealing mechanism comprises a spring plate (16), the spring plate (16) being arranged in the reset chamber (5), the bottom end of the spring plate (16) being fixedly connected to a sealing frame (17), one end of the spring plate (16) being fixedly connected to a rack (18), a cam (19) being fixedly connected to the valve stem (3), the cam (19) being in contact with the rack (18), a screw rod (20) being rotatably connected in the reset chamber (5), a gear (21) being fixedly connected to the screw rod (20), the gear (21) being in mesh with the rack (18).

5. The pneumatic ultra-wear-resistant polysilicon-specific cut-off valve according to claim 4 is characterized in that: The screw rod (20) is threadedly connected to a drag plate (22), one end of the drag plate (22) is fixedly connected to a sealing sleeve (23), and the sealing sleeve (23) slides on the valve stem (3).

Images