An ultra-high temperature flue valve

Abstract

The application discloses an ultrahigh-temperature flue valve and relates to the field of high-temperature pipeline accessories. The ultrahigh-temperature flue valve comprises a valve body (1), a valve rod (2) penetrating through the valve body (1), a filler (3) sleeved on the valve rod (2) and filled in the gap between the valve rod (2) and the valve body (1), and a filler gland (4) arranged at the upper end of the gap. The filler (3) comprises a first filler body (31) and a second filler body (32). The first filler body (31) is arranged at the upper and lower ends in the gap, and the first filler body (31) and the second filler body are alternately arranged in the space between the upper and lower ends. The first filler body (31) and the second filler body (32) have a structure with thermal expansion and cold shrinkage compensation in four degrees of freedom, i.e. up, down, left and right. The ultrahigh-temperature flue valve has the advantages that the filler (3) has self-compensation and high-temperature resistance, the problems of excessive friction caused by too close adhesion and jamming after thermal expansion are eliminated, and the service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-temperature pipeline fittings, in particular to a super-high-temperature flue valve. BACKGROUND

[0002] The flue valve is a commonly used fitting in the energy environmental protection, smelting, petroleum, chemical industry, printing and dyeing, electronic basic manufacturing, pharmaceutical, food and other industries. The existing high-temperature flue is made of a spiral pipe, lined with ceramic fiber blanket and insulating castable. The high-temperature flue valve is a device arranged on the high-temperature flue, which is used for adjusting the flue gas volume and discharging the high-temperature flue gas to the dust removal flue.

[0003] The packing is a filling material of dynamic seal, which is often used for the outer seal of the rotating (sliding) part of the valve to prevent the leakage of the flowing medium from the valve stem and the packing space to the outside. The packing seal is one of the key parts of the valve product. In order to achieve good sealing effect, on the one hand, the material quality of the packing itself should be determined, and the structure should be adapted to the needs of the medium working condition, and on the other hand, the reasonable packing installation method and the structure of the packing space should be considered to ensure reliable sealing.

[0004] The inner sealing ring of the packing space is generally composed of several layers of packing, which is pressed by the packing pressing plate to make the packing deform, fully contact with the outer surface of the valve stem and the inner surface of the packing space, and achieve a certain pressure, so as to prevent the medium from leaking out. The pressing force is transmitted from top to bottom, and the pressing force of each layer of packing is weakened, the smaller the deformation of the packing, the worse the sealing performance. The medium with working pressure is easy to overflow from the inside of the valve to the outside, so the medium pressure is easy to pass through the lower packing of the packing space. If the packing is too loose, the valve packing is easy to leak, and if the packing is too tight, the friction between the valve stem and the packing is too large, and the valve is difficult to open and close or not flexible. For the high-temperature flue valve, in the use process, the valve is affected by thermal expansion and cold contraction, which will cause the valve stem and the packing to be locked. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a super-high-temperature flue valve which can effectively prevent the valve stem and the packing from being locked.

[0006] The technical scheme adopted by the present application to solve the technical problem is that the super-high-temperature flue valve comprises a valve body, a valve stem penetrating in the valve body, a packing filled in the gap between the valve stem and the valve body, and a packing gland arranged at the upper end of the gap.

[0007] The packing comprises a first packing body and a second packing body, the first packing body is arranged at the upper and lower ends in the gap, and the first packing body and the second packing body are alternately arranged in the space between the upper and lower ends.

[0008] The first filler body and the second filler body are structures with thermal expansion and cold shrinkage compensation in four degrees of freedom of up, down, left and right.

[0009] Further, the first filler body is annular, and the first filler body comprises a first connecting plate and a second connecting plate arranged in a vertical direction, and a first compensation mechanism is arranged between the first connecting plate and the second connecting plate.

[0010] Further, the first compensation mechanism comprises a V-shaped connecting plate, and two upper ends of the V-shaped connecting plate are connected to upper ends of the first connecting plate and the second connecting plate respectively.

[0011] Further, a first connecting plate and a second connecting plate are further arranged on an outer side wall surface of the V-shaped connecting plate and connected to the first connecting plate and the second connecting plate respectively.

[0012] Further, the first connecting plate and the second connecting plate are different in horizontal height.

[0013] Further, the second filler body is annular, and the second filler body comprises a first connecting piece and a second connecting piece arranged alternately, the first connecting piece comprises a barrel with open two ends, and the second connecting piece is an arc-shaped plate.

[0014] The barrel and the arc-shaped plate constitute a second compensation mechanism.

[0015] Further, a cross section of the first connecting piece is fan-shaped, the first connecting piece comprises an inner wall, an outer wall and a side wall connected to the inner wall and the outer wall, and the second connecting piece is connected to the side walls on two sides.

[0016] The inner wall has an arc suitable for a valve rod, and the outer wall has an arc suitable for a gap wall surface.

[0017] Further, the side wall is concave and arc-shaped in the direction of the barrel.

[0018] Further, the second filler body is annular, and two annular first grooves are arranged on an upper surface of the second filler body, and a width of the first grooves is greater than a width of the first connecting plate and the second connecting plate.

[0019] Further, two annular second grooves are arranged on a lower surface of the second filler body, and a width of the second grooves is greater than a width of a connecting part of the first connecting plate, the second connecting plate and the V-shaped connecting plate.

[0020] The super-high-temperature flue valve comprises a first packing body and a second packing body which are alternately arranged in a gap, wherein the first packing body and the second packing body have a structure for compensating thermal expansion and cold contraction, can adapt to high-temperature environment and ordinary normal temperature environment, and have self-compensation in the use process affected by thermal expansion and cold contraction, so that the packing can be adjusted to a certain extent after expansion, and the sticking of the valve rod and the packing is avoided. The super-high-temperature flue valve has self-compensation and high-temperature resistance, eliminates the problems of excessive friction caused by too close fitting and sticking after thermal expansion, and prolongs the service life of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described below in combination with the drawings and examples, wherein:

[0022] Figure 1 is a sectional view of the super-high-temperature flue valve of the embodiment of the application;

[0023] Figure 2 is a structural schematic view of the packing of the embodiment of the application;

[0024] Figure 3 is a structural schematic view of the packing of the embodiment of the application;

[0025] Figure 4 is a structural schematic view of the first packing body and the second packing body of the embodiment of the application;

[0026] Figure 5 is a structural schematic view of the first packing body and the second packing body of the embodiment of the application;

[0027] Figure 6 is a side view of the first packing body and the second packing body of the embodiment of the application;

[0028] Figure 7 is Figure 6 a sectional view along B-B;

[0029] Figure 8 is Figure 7 an enlarged view of A of

[0030] Figure 9 is a structural schematic view of the first packing body of the embodiment of the application;

[0031] Figure 10 is a structural schematic view of the second packing body of the embodiment of the application.

[0032] Explanation of reference signs:

[0033] 1, valve body; 2, valve stem; 3, packing; 31, first packing body; 311, first connecting plate; 312, second connecting plate; 313, V-shaped connecting plate; 314, first connecting plate; 315, second connecting plate; 32, second packing body; 321, first connecting piece; 3211, inner wall; 3212, outer wall; 3213, side wall; 322, second connecting piece; 33, first recess; 34, second recess; 4, packing gland. DETAILED DESCRIPTION

[0034] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings.

[0035] As shown in the drawings, the ultra-high temperature flue valve comprises a valve body 1, a valve stem 2 penetrating the valve body 1, a packing 3 sleeved on the valve stem 2 and filled in the gap between the valve stem 2 and the valve body 1, and a packing gland 4 arranged at the upper end of the gap. Figures 1-10

[0036] The packing 3 comprises a first packing body 31 and a second packing body 32, and the first packing body 31 is arranged at the upper and lower ends in the gap, and the first packing body 31 and the second packing body 32 are alternately arranged in the space between the upper and lower ends.

[0037] The first packing body 31 and the second packing body 32 have a structure of thermal expansion and contraction compensation in four degrees of freedom of up, down, left and right.

[0038] The ultra-high temperature flue valve comprises the first packing body 31 and the second packing body 32 alternately arranged in the gap, wherein the first packing body 31 and the second packing body 32 have a structure of thermal expansion and contraction compensation, which can adapt to high-temperature environment and ordinary normal temperature environment. In the use process, the valve is affected by thermal expansion and contraction, and the packing 3 has self-compensation, so that it can be adjusted to a certain extent after expansion, and the wall surface causes the valve stem 2 and the packing 3 to be locked. The ultra-high temperature flue valve of the present application has self-compensation and high-temperature resistance, and eliminates the problems of excessive friction caused by too close fitting and jamming after thermal expansion, prolonging the service life of the valve.

[0039] ​The first packing body 31 is annular, and comprises a first connecting plate 311 and a second connecting plate 312 which are arranged in a vertical direction and are provided with a first compensation mechanism. In the embodiment, the first connecting plate 311 and the second connecting plate 312 are annular plates with the same height. The first compensation mechanism comprises a V-shaped connecting plate 313, and the two upper ends of the V-shaped connecting plate 313 are connected to the upper ends of the first connecting plate 311 and the second connecting plate 312 respectively. The first connecting plate 311, the V-shaped connecting plate 313 and the second connecting plate 312 are connected at the ends and have an M-shaped cross section as a whole, and form a ring. After being heated and expanded, the first connecting plate 311 and the second connecting plate 312 on both sides increase in length and thickness, and the V-shaped connecting plate 313 in the middle is slightly deformed under pressure, thereby extruding the valve rod 2 and preventing the valve rod 2 from being stuck to a certain extent. At the same time, the deformation does not affect the change of the sealing property.

[0040] The V-shaped connecting plate 313 is further provided with a first connecting plate 314 and a second connecting plate 315 on the outer side wall surface, which are connected to the first connecting plate 311 and the second connecting plate 312 respectively. In the embodiment, the first connecting plate 314 and the second connecting plate 315 have different horizontal heights. The first connecting plate 314 and the second connecting plate 315 can effectively enhance the connection strength of the first connecting plate 311, the V-shaped connecting plate 313 and the second connecting plate 312, and at the same time, the deformation space of the plate parts is reserved, so that the valve rod 2 and the gap inner wall 3211 are not excessively extruded after thermal expansion. Further, the first connecting plate 314 and the second connecting plate 315 are asymmetrically arranged at different heights to avoid interference caused by the same deformation direction.

[0041] The second packing body 32 is annular, and comprises first connecting pieces 321 and second connecting pieces 322 which are arranged alternately, the first connecting piece 321 comprises a hollow cylinder with open ends, and the second connecting piece 322 is an arc-shaped plate; the cylinder and the arc-shaped plate form a second compensation mechanism. The hollow cylinder structure of the first connecting piece 321 provides a deformation space after being heated, and the arc-shaped plate of the second connecting piece 322 is used to connect the cylinder to provide an adjustment space for the deformation of the adjacent two cylinders, thereby avoiding the complete application of the pressure after the deformation between the packing gap and the valve rod 2 to cause the valve rod 2 to be stuck.

[0042] The cross section of the first connecting piece 321 is fan-shaped, and the first connecting piece 321 comprises an inner wall 3211, an outer wall 3212 and a side wall 3213 connected to the inner wall 3211 and the outer wall 3212, and the second connecting piece 322 is connected to the side walls 3213 on both sides; the inner wall 3211 has an arc suitable for the valve rod 2, and the outer wall 3212 has an arc suitable for the gap wall surface. In the embodiment, the side wall 3213 is recessed in the direction of the cylinder and is arc-shaped.

[0043] The second filler body 32 is annular, and two annular first grooves 33 are formed on the upper surface of the second filler body 32, and the width of the first grooves 33 is greater than the width of the first connecting plate 311 and the second connecting plate 312.

[0044] Two annular second grooves 34 are formed on the lower surface of the second filler body 32, and the width of the second grooves 34 is greater than the width of the connecting position of the first connecting plate 311 and the second connecting plate 312 and the V-shaped connecting plate 313.

[0045] In the embodiment, the first connecting plate 311 and the second connecting plate 312 are provided with stepped end portions at the bottom, the width of the stepped end portions is slightly smaller than the width of the first grooves 33, and the first filler body 31 and the second filler body 32 are tightly matched through the first grooves 33 and the second grooves 34.

[0046] The first grooves 33 and the second grooves 34 are effectively matched with the lower end and the upper end of the first filler body 31, and after deformation, the first connecting plate 311 and the second connecting plate 312 can be deformed within a preset range in the first grooves 33, that is, a relatively small displacement within the width range of the first grooves 33; similarly, the connecting position of the first connecting plate 311 and the second connecting plate 312 and the V-shaped connecting plate 313 is slightly deformed in the second grooves 34, so that the sealing and matching effect of the valve rod 2 and the filler 3 is better.

[0047] Finally, it should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0048] Obviously, the above embodiments are only examples for the sake of clarity, and are not limiting to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An ultra-high temperature flue valve characterized by, The utility model relates to a valve, which comprises a valve body (1), a valve stem (2) arranged in the valve body (1), a packing (3) arranged on the valve stem (2) and filling the gap between the valve stem (2) and the valve body (1), and a packing gland (4) arranged at the upper end of the gap. The packing (3) comprises a first packing body (31) and a second packing body (32), the first packing body (31) is arranged at the upper and lower ends of the gap, and the first packing body (31) and the second packing body are alternately arranged in the space between the upper and lower ends. The first packing body (31) and the second packing body (32) have a structure capable of compensating thermal expansion and cold contraction in four degrees of freedom, i.e., up, down, left and right. The first packing body (31) is annular, and comprises a first connecting plate (311) and a second connecting plate (312) arranged in a vertical direction, and a first compensation mechanism arranged between the first connecting plate (311) and the second connecting plate (312). The first compensation mechanism comprises a V-shaped connecting plate (313), and the two upper ends of the V-shaped connecting plate (313) are connected to the upper ends of the first connecting plate (311) and the second connecting plate (312), respectively. First and second connecting plates (314) and (315) are further arranged on the outer side wall surface of the V-shaped connecting plate (313) and connected to the first and second connecting plates (311) and (312), respectively. The first and second connecting plates (314) and (315) have different horizontal heights. The second packing body (32) is annular, and comprises a first connecting piece (321) and a second connecting piece (322) arranged alternately, the first connecting piece (321) comprises a barrel with open ends, and the second connecting piece (322) is an arc-shaped plate. The barrel and the arc-shaped plate constitute a second compensation mechanism.

2. The ultra-high-temperature damper valve of claim 1, wherein, The first connecting piece (321) has a fan-shaped cross section, and comprises an inner wall (3211), an outer wall (3212) and a side wall (3213) connected to the inner wall (3211) and the outer wall (3212), and the second connecting piece (322) is connected to the side walls (3213) on both sides. The inner wall (3211) has a curvature matched with the valve stem (2), and the outer wall (3212) has a curvature matched with the wall surface of the gap.

3. The ultra-high-temperature damper valve of claim 2, wherein, The side wall (3213) is recessed and arc-shaped towards the barrel.

4. The ultra-high-temperature damper valve of claim 1, wherein, The second packing body (32) is annular, and two annular first grooves (33) are arranged on the upper surface of the second packing body (32), and the width of the first grooves (33) is greater than the thickness of the first and second connecting plates (311) and (312).

5. The ultra-high-temperature damper valve of claim 4, wherein, Two annular second grooves (34) are arranged on the lower surface of the second packing body (32), and the width of the second grooves (34) is greater than the thickness of the connecting parts of the first and second connecting plates (311) and (312) and the V-shaped connecting plate (313).

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