Valve rod of pneumatic valve
By installing multiple layers of bent packing rings and disc springs on the valve stem of the pneumatic valve, the problem of valve packing leakage in polysilicon production was solved, and the valve's sealing performance and adjustment sensitivity were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-24
AI Technical Summary
In polysilicon production, leakage of the packing inside the valve can lead to scaling of the medium, causing the valve to jam or its adjustment sensitivity to decrease.
A pneumatic valve stem is designed to enhance sealing by incorporating two sets of packing assemblies, including multi-layered bent packing rings, outside the stem body, and to provide preload by incorporating disc springs on the bolts, allowing for secondary tightening to prevent leakage.
Effectively prevents media leakage, ensures valve sealing and adjustment sensitivity, and provides a tightening allowance to address potential leakage problems.
Smart Images
Figure CN224033222U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely relates to a pneumatic valve valve stem. BACKGROUND
[0002] Polysilicon is a form of elemental silicon. When molten elemental silicon solidifies under supercooling conditions, silicon atoms arrange in a diamond lattice form to form many crystal nuclei. If these crystal nuclei grow into grains with different crystal plane orientations, these grains combine to form polysilicon.
[0003] At present, when the packing in the valve leaks in the polysilicon production, chlorosilane, silicon tetrachloride and other media will scale at the valve stem, causing the valve to jam or causing the valve to adjust sensitivity to decline. CONTENT OF THE UTILITY MODEL
[0004] The utility model discloses a kind of pneumatic valve valve stems, which can be secondarily fastened when packing leaks to avoid packing leakage.
[0005] The utility model discloses the following technical solutions to achieve:
[0006] A pneumatic valve valve stem, comprising:
[0007] A valve body;
[0008] A valve cover bolted to the valve body;
[0009] A valve stem body provided in the valve cover;
[0010] A gland bolted to the top of the valve cover;
[0011] Among them, the first packing assembly is provided on the outer side of the valve stem body in the valve cover, the first packing assembly is arranged at the lower part in the valve cover, the first packing assembly comprises a plurality of first packing rings arranged in overlap, and the cross section of the first packing ring is in a bent shape.
[0012] Optionally, the first packing ring is bent upwards at the bent portion, and the outer bend and the inner bend of the bent portion are both rounded.
[0013] Optionally, the cross section of the first packing ring comprises an inner ring and an outer ring, the inner ring is close to the valve stem body, the outer ring is close to the valve cover, the cross sections of the inner ring and the outer ring are both inclined surfaces, and the part where the inner ring and the outer ring meet is the high end of them.
[0014] Optionally, the included angle of the inclined surfaces of the inner ring and the outer ring is obtuse.
[0015] Optionally, the outer sidewalls of the inner ring and the outer ring are both vertical planar structures, and the height of the outer sidewall of the inner ring is half the width of the horizontal projection of the first packing ring.
[0016] Optionally, the bottom of the outer edge of the outer ring has a horizontally arranged smooth section, which is a horizontal plane and is arranged along the bottom of the outer edge of the outer ring and is in the shape of a ring.
[0017] Optionally, a second packing assembly is arranged outside the valve rod body in the valve cover, the second packing assembly is arranged at the top in the valve cover, and the first packing assembly and the second packing assembly are both made of graphite.
[0018] Optionally, the second packing assembly is in the shape of a ring and comprises a plurality of second packing rings, a third packing ring is arranged between any two adjacent second packing rings, a fourth packing ring is arranged on the second packing ring at the top, and a fifth packing ring is arranged on the second packing ring at the bottom.
[0019] Optionally, the second packing ring comprises a horizontal part, first and second vertical parts extending vertically downward and upward at two ends of the horizontal part respectively, the third packing ring is shaped to fit the gap region between the two second packing rings, the fourth packing ring is in contact with the horizontal part and the second vertical part of the second packing ring at the top, and the fifth packing ring is in contact with the horizontal part and the first vertical part of the second packing ring at the bottom.
[0020] Optionally, a disc spring is arranged on the bolt connecting the valve cover and the valve body and on the bolt connecting the gland and the valve cover, and the disc spring is sleeved on the bolt.
[0021] The utility model discloses the beneficial effect is:
[0022] The utility model discloses through lengthening valve rod body, and setting two groups of packing assembly outside valve rod body, the sealing property of valve rod body is strengthened, and the medium leakage is avoided, and the packing assembly of setting is by multilayer packing ring superposition, and the first packing ring among them is bended, and the packing has the force of pre -tension to valve rod body after packing compression, and when primary fastening, the force of fastening guarantees that packing does not leak, and packing still has fastening surplus, if finding packing leakage in the use process, can carry out secondary fastening of packing, guarantee the sealing property of valve rod body. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.
[0024] Fig. 1 It is a structural diagram of the utility model;
[0025] Fig. 2 It is a first packing ring structure diagram;
[0026] Fig. 3 Figure 2 is a structural diagram of a second packing assembly.
[0027] Reference numerals: 1, valve body; 2, valve cover; 3, valve stem body; 4, gland; 5, disc spring; 6, first packing assembly; 61, first packing ring; 611, outer ring; 612, inner ring; 613, smooth section; 7, second packing assembly; 71, third packing ring; 72, second packing ring; 73, fourth packing ring; 74, fifth packing ring. DETAILED DESCRIPTION
[0028] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.
[0029] In the description of the present invention, it needs to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present invention.
[0030] In addition, the terms "first", "second" are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0031] The embodiments of the present utility model will be described in detail below in combination with the drawings.
[0032] As Figs. 1-3 shown, the utility model discloses a pneumatic valve valve stem, including the bolt connection on the valve body 1 valve cover 2, be equipped with valve stem body 3 in valve cover 2, valve stem body 3 lengthens, and the bolt connection of valve cover 2 top has gland 4.
[0033] The outer side of the valve stem body 3 in the valve cover 2 is provided with a first packing assembly 6 and a second packing assembly 7 made of graphite material, the first packing assembly 6 is arranged at the lower part in the valve cover 2, and the second packing assembly 7 is arranged at the top part in the valve cover 2.
[0034] The first packing assembly 6 comprises a plurality of first packing rings 61 arranged in superposition, the first packing ring 61 is in the shape of a cross section of a bend, the bend part is upwardly bent, and the outer bend and the inner bend of the bend part are both rounded. Specifically, the first packing ring 61 is in the shape of a cross section comprising an inner ring 612 and an outer ring 611, the inner ring 612 is close to the valve stem body 3, and the outer ring 611 is close to the valve cover 2, the cross sections of the inner ring 612 and the outer ring 611 are both bevels, the part where the inner ring 612 and the outer ring 611 meet is the high end of them, and the included angle of the bevels of the inner ring 612 and the outer ring 611 is obtuse. The outer side walls of the inner ring 612 and the outer ring 611 are both vertical planar structures, the height of the outer side wall of the inner ring 612 is half of the width of the first packing ring 61 in the horizontal projection, the bottom of the outer edge of the outer ring 611 has a smooth section 613 arranged horizontally, the smooth section 613 is a horizontal plane and is arranged along the bottom of the outer edge of the outer ring 611 in the shape of a circular ring. When the plurality of first packing rings 61 are superimposed, the outer bend of the bend part of the lower first packing ring 61 is clamped into the inner bend of the bend part of the upper first packing ring 61.
[0035] The second packing assembly 7 is in the shape of a circular ring, comprising two second packing rings 72, a third packing ring 71 is arranged between the two second packing rings 72, a fourth packing ring 73 is arranged on the top second packing ring 72, and a fifth packing ring 74 is arranged on the bottom second packing ring 72.
[0036] The second packing ring 72 is in the shape of a Z, comprising a horizontal part, one end of the horizontal part is connected with a first vertical part extending vertically downward, and the other end of the horizontal part is connected with a second vertical part extending vertically upward. The shape of the third packing ring 71 is adapted to the gap region between the two second packing rings 72, the third packing ring 71 is filled between the two second packing rings 72, and the third packing ring 71 comprises two horizontal sections arranged one above the other, and the two horizontal sections are partially overlapped and connected.
[0037] The fourth packing ring 73 is in the shape of a circular ring, and is filled on the top of the horizontal part of the top second packing ring 72, and the fourth packing ring 73 is in contact with the horizontal part and the second vertical part of the second packing ring 72.
[0038] The fifth packing ring 74 is in the shape of a circular ring, and is filled on the bottom of the horizontal part of the bottom second packing ring 72, and the fifth packing ring 74 is in contact with the horizontal part and the first vertical part of the second packing ring 72.
[0039] In addition to the embodiment, the number of the second packing ring 72 can also be more than two, as long as the third packing ring 71 is filled between the two adjacent second packing rings 72.
[0040] The disc spring 5 is arranged on the bolt connecting the valve cover 2 and the valve body 1, and the disc spring 5 is also arranged on the bolt connecting the gland 4 and the valve cover 2, and the disc spring 5 is sleeved on the bolt.
[0041] The utility model discloses a valve stem body 3 is lengthened, and two groups of packing assemblies are set up outside valve stem body 3, and the sealing property at valve stem body 3 is enhanced, medium leakage is avoided, the packing assembly set up is by multilayer packing ring superposition, and the first packing ring 61 among them is bended, and packing will have the force of pre -tension to valve stem body 3 after packing compression, and when primary fastening, the force of fastening guarantees that packing does not leak, and packing still has fastening surplus, if finding packing leakage in the use process, can carry out the secondary fastening of packing, guarantee the sealing property of valve stem body 3.
[0042] The above examples are only preferred embodiments of the utility model, and are not a limitation on the technical scheme of the utility model, and as long as the technical scheme can be realized on the basis of the above examples without creative labor, it should be considered to fall within the protection scope of the utility model patent.
Claims
1. A pneumatic valve stem, characterized in that, include: Valve body; The valve cover is bolted to the valve body; The valve stem body is located inside the valve cover; The gland is bolted to the top of the valve cover; The valve cover has a first packing assembly located on the outer side of the valve stem body. The first packing assembly is located in the lower part of the valve cover and includes multiple overlapping first packing rings with a bent cross-section.
2. The pneumatic valve stem according to claim 1, characterized in that, The first packing ring has an upward-bent section, with both the outer and inner bends rounded.
3. The pneumatic valve stem according to claim 2, characterized in that, The first packing ring cross-section includes an inner ring and an outer ring. The inner ring is close to the valve stem body, and the outer ring is close to the valve cover. Both the inner ring and the outer ring cross-section are inclined planes, and the part where the inner ring and the outer ring meet is their high end.
4. The pneumatic valve stem according to claim 3, characterized in that, The angle between the inner and outer ring inclined planes is an obtuse angle.
5. The pneumatic valve stem according to claim 4, characterized in that, The outer walls of both the inner and outer rings are vertical planar structures, and the height of the outer wall of the inner ring is half the width of the projection of the first packing ring onto the horizontal plane.
6. The pneumatic valve stem according to claim 5, characterized in that, The bottom of the outer edge of the outer ring has a horizontally arranged smooth section, which is a horizontal plane and arranged along the bottom of the outer edge of the outer ring in a circular shape.
7. The pneumatic valve stem according to any one of claims 1 to 6, characterized in that, The valve cover has a second packing assembly on the outside of the valve stem body. The second packing assembly is located at the top inside the valve cover. Both the first packing assembly and the second packing assembly are made of graphite.
8. The pneumatic valve stem according to claim 7, characterized in that, The second packing assembly is annular in shape and includes multiple second packing rings. A third packing ring is provided between two adjacent second packing rings, a fourth packing ring is provided on the top second packing ring, and a fifth packing ring is provided on the bottom second packing ring.
9. The pneumatic valve stem according to claim 8, characterized in that, The second packing ring includes a horizontal portion, and the two ends of the horizontal portion are respectively connected to a first vertical portion extending downward and a second vertical portion extending upward. The shape of the third packing ring is adapted to the gap area between the two second packing rings. The fourth packing ring contacts the horizontal portion and the second vertical portion of the top second packing ring. The fifth packing ring contacts the horizontal portion and the first vertical portion of the bottom second packing ring.
10. The pneumatic valve stem according to claim 7, characterized in that, Disc springs are provided on the bolts connecting the valve cover and the valve body, as well as on the bolts connecting the gland and the valve cover, and the disc springs are sleeved on the bolts.