CN210372277U - Abrasive disc type material conveying valve with self-tightening sealing valve rod - Google Patents
Abrasive disc type material conveying valve with self-tightening sealing valve rod Download PDFInfo
- Publication number
- CN210372277U CN210372277U CN201921259924.8U CN201921259924U CN210372277U CN 210372277 U CN210372277 U CN 210372277U CN 201921259924 U CN201921259924 U CN 201921259924U CN 210372277 U CN210372277 U CN 210372277U
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- self
- pressing ring
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model provides a valve rod self-tightening sealing's abrasive disc formula material delivery valve, this material delivery valve has the self-tightening sealing member of self-tightening sealing function through setting up at the valve rod middle part, this self-tightening sealing member includes first clamping ring, the second clamping ring and sets up the seal unit between this first clamping ring and this second clamping ring, this first clamping ring and/or this second clamping ring can promote this seal unit and carry out automatic compensation under the pressure effect that comes from the transported substance material to make this seal unit form self-tightening sealing to this valve rod. The self-tightening sealing member of the material conveying valve can self-adaptively perform automatic compensation compression under the pressure action of conveying materials in the material conveying valve in the working process, so that the radial force applied to the valve rod by the self-tightening sealing member and the contact and attachment tightness degree are changed, the situation that the self-tightening sealing member generates a gap with the valve rod under the external action of abrasion or corrosion and the like is effectively avoided, and the sealing performance of the material conveying valve can be greatly improved.
Description
Technical Field
The invention relates to a material conveying valve, in particular to a material conveying valve applied to a thermal power ash removal system, and further relates to a millstone type material conveying valve with a self-tight sealing valve rod.
Background
The valve rod is a key rotating part in the valve, and the material transmission valve drives the valve plate to move by means of rotation of the valve rod in the opening and closing process, so that the functions of closing the valve and opening the valve are achieved. Meanwhile, the sealing component in the middle of the valve rod tightly holds the valve rod through interference fit, so that the rotary sealing of the valve rod relative to the rotary rotating shaft is realized during working. Therefore, the material and the structure of the sealing part in the middle of the valve rod directly influence whether the valve rod of the material conveying valve can be effectively sealed in the working process, and simultaneously influence whether the conveyed medium material can be leaked to the outside of the valve through the gap of the valve rod.
At present, the problems of medium material leakage, environmental pollution and the like generally exist in a grinding disc type material conveying valve used in a thermal power operation dust removal system, because medium materials such as pulverized coal ash and the like have the characteristics of fine particles and corrosivity, the general valve rod sealing element packing can generate the conditions of abrasion and corrosion after being used for a certain time, so that a gap is generated between a valve rod and a sealing element, the sealing element cannot compensate the gap, and finally the medium material is leaked. The leakage of medium materials such as fly ash and slag not only pollutes the environment, but also seriously affects the health of operators. Therefore, the prior art urgently needs a valve rod sealing structure which can prevent the leakage of medium materials in the long-term use process of the material conveying valve, thereby effectively preventing the leakage of the medium materials such as pulverized coal ash and the like.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
In view of the defects in the prior art, the invention provides a millstone-type material conveying valve with a self-tightening sealing function of a valve rod, the millstone-type material conveying valve is provided with a self-tightening sealing component with the self-tightening sealing function in the middle of the valve rod, the self-tightening sealing component comprises a first pressing ring, a second pressing ring and a sealing unit arranged between the first pressing ring and the second pressing ring, and the first pressing ring and/or the second pressing ring can push the sealing unit to automatically compensate under the pressure from conveyed materials, so that the sealing unit forms self-tightening sealing on the valve rod.
The self-tightening sealing member can self-adaptively perform automatic compensation compression under the pressure action of conveying materials in the material conveying valve in the working process, so that the radial force and the contact close degree exerted on the valve rod by the self-tightening sealing member are changed, the condition that the self-tightening sealing member generates a gap with the valve rod under the external actions of abrasion or corrosion and the like is effectively avoided, and the sealing property of the material conveying valve can be greatly improved.
The invention provides a millstone type material conveying valve with a self-tightening sealing valve rod, which comprises a valve cover and a valve rod,
a valve cover hole is arranged at one side of the valve cover, the valve rod is arranged in the valve cover hole in a penetrating way, a self-tightening sealing component is accommodated in a space between the outer peripheral wall of the valve rod and the inner side wall of the valve cover hole,
the self-tightening sealing member comprises a first pressing ring, a second pressing ring and a sealing unit arranged between the first pressing ring and the second pressing ring;
the first pressing ring and/or the second pressing ring can push the sealing unit to automatically compensate under the pressure from conveyed materials, so that the sealing unit forms self-tightening sealing on the valve rod.
Furthermore, the outer side of the valve cover is provided with a boss extending outwards, the valve cover hole is a hollow cylinder hole formed in the boss part and the valve cover part, and the inner wall of the hollow cylinder is provided with a stepped accommodating area;
the middle part of the valve rod penetrates through the stepped accommodating area;
the stepped accommodating area comprises a first cylindrical area and a second cylindrical area, and the first cylindrical area is positioned below the second cylindrical area; wherein the content of the first and second substances,
the inner diameter of the first cylindrical region is equal to the diameter of the valve stem;
the second cylindrical region has an inner diameter greater than a diameter of the stem, and an annular gap between the second stepped region and the stem forms the space for accommodating the self-tightening sealing member.
Further, the sealing unit is an annular packing structure with a preset cross-sectional shape, and the annular packing structure comprises a first joint surface and a second joint surface;
the first pressing ring comprises a first pressing ring main body part and a first pressing ring joint part which are integrally formed;
the second pressing ring comprises a second pressing ring main body part and a second pressing ring joint part which are integrally formed;
the first pressing ring joint part has a first surface shape matched with the first joint surface, so that the first pressing ring joint part and the first joint surface are mutually embedded and contacted;
the second clamping ring joint part has a second surface shape matched with the second joint surface, so that the second clamping ring joint part and the second joint surface are mutually embedded and contacted.
Further, the preset cross section of the annular packing structure is in any one of a horizontal V shape, a C shape, an X shape, a star shape, a 'Ji' shape and an O shape.
Further, when the preset cross section is in a horizontal V shape or a horizontal C shape, the first clamping ring joint part and the second clamping ring joint part are both in a wedge-shaped structure, and the first joint surface and the second joint surface are both inclined surfaces matched with the wedge-shaped structure;
alternatively, the first and second electrodes may be,
when the preset cross section is in an X-shaped or star-shaped shape, the first clamping ring joint part and the second clamping ring joint part are both smooth convex structures, and the first joint surface and the second joint surface are both smooth concave surfaces matched with the smooth convex structures;
alternatively, the first and second electrodes may be,
when the preset cross section is in a shape of a Chinese character 'ji', the first pressing ring joint part and the second pressing ring joint part are both in a chamfer structure, and the first joint surface and the second joint surface are both curved concave surfaces matched with the chamfer structure;
alternatively, the first and second electrodes may be,
when the preset cross section is O-shaped, the first pressing ring joint part and the second pressing ring joint part are of concave arc structures, and the first joint surface and the second joint surface are convex arc surfaces matched with the concave arc structures.
Further, the sealing unit comprises a plurality of sealing filler single pieces and at least one spacer ring piece for the plurality of sealing filler single pieces;
the first pressing ring and the second pressing ring are respectively in press fit contact with different sealing filler single pieces in the plurality of sealing filler single pieces.
Further, each of the sealing filler single pieces is provided with a hollow air bag structure, the hollow air bag structure is located inside the sealing filler single piece, and when the sealing filler single piece bears extrusion force, the vertical deformation of the sealing filler single piece is converted into transverse deformation through the hollow air bag structure, so that the sealing filler single piece performs compensation sealing on the valve rod.
Further, the hollow airbag structure at least comprises a hollow traceless airbag and an inner layer structure coating the hollow traceless airbag from inside to outside, and can also comprise an outer layer structure coating the inner layer structure; wherein the content of the first and second substances,
the inner layer structure is made of elastomer materials;
the material of the outer layer structure is thermoplastic material.
Further, the first pressing ring and/or the second pressing ring enabling the sealing unit to form a self-tight seal on the valve rod comprises,
the first pressing ring and/or the second pressing ring push the sealing unit to compress so that the radial force applied by the sealing unit to the valve rod can be changed adaptively, and therefore the specific sealing pressure between the valve rod and the sealing unit is guaranteed to be matched with the pressure from the conveyed material.
Further, the first pressing ring and the second pressing ring are made of elastic organic polymers;
alternatively, the first and second electrodes may be,
the sealing unit is made of an organic material having thermoplasticity and viscoelasticity.
Compared with the prior art, the millstone-type material conveying valve with the self-tight sealing valve rod adopts the self-tight sealing component with the self-tight sealing characteristic to dynamically seal the valve rod; the self-tightening sealing component can adaptively adjust the sealing specific pressure of the self-tightening sealing component on the valve rod along with the pressure of the conveyed medium material, so that dynamic and active self-tightening sealing adjustment is realized, and the self-tightening sealing function of the valve rod and the component is realized; the self-tightening sealing component also has the function of automatic compensation, and when a gap is generated due to abrasion of a filler corresponding to the valve rod, the self-tightening sealing component can automatically compensate and fill the gap under the pushing of the pressure of the medium material, so that the self-tightening sealing component always forms a tight holding seal on the valve rod; the self-tightening sealing component can effectively ensure that the valve does not have the condition of medium material leakage, so that the valve can not have the problems of environment pollution and influence on the body health of operators due to the leakage of pulverized coal ash slag after long-time operation, and is an optimal environment-friendly product for a thermal power plant; the material performance that this valve rod self-tightening sealed material delivery valve used is excellent, structurally have initiative automatic compensation's function again, and make the self-tightening sealing member have less radial force and do not have wearing and tearing to the valve rod axial region, thereby make material delivery valve's air supply power loss little and leakproofness reliable, this is favorable to prolonging the life of whole machine of valve and reduces the time of machine halt maintenance, in addition, this valve rod self-tightening sealed mill formula material delivery valve still has simple structure, the low price and be convenient for advantages such as maintenance change.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a millstone-type material conveying valve with a self-tightening sealing valve rod provided by the invention;
FIG. 2 is a first structural schematic view (horizontal V-shaped) of a self-tightening sealing member in a millstone-type material conveying valve with a self-tightening seal of a valve rod provided by the invention;
FIG. 3 is a second structural schematic view (C-shaped) of a self-tightening sealing member in the valve stem self-tightening sealing millstone type material conveying valve provided by the invention;
FIG. 4 is a third structural schematic view (X-shaped) of a self-tightening sealing member in the valve stem self-tightening sealing millstone type material conveying valve provided by the invention;
FIG. 5 is a fourth structural schematic diagram (star type) of a self-tightening sealing member in a millstone-type material conveying valve with a self-tightening seal of a valve rod provided by the invention;
FIG. 6 is a fifth structural schematic view (shaped like a Chinese character 'ji') of a self-tightening sealing member in a millstone-type material conveying valve with a self-tightening seal of a valve rod provided by the invention;
FIG. 7 is a sixth structural schematic view (O-shaped) of a self-tightening sealing member in a millstone-type material conveying valve with a self-tightening seal of a valve rod provided by the invention;
FIG. 8 is a schematic structural diagram (schematically represented by an O-shape) of a sealing unit in a valve stem self-tightening sealing millstone type material conveying valve provided by the invention, wherein the sealing unit is composed of a plurality of sealing packing single pieces;
FIG. 9 is a schematic structural diagram (an X-shaped schematic example) of an embodiment of a single sealing packing in a millstone-type material conveying valve with a self-tightening sealing valve rod provided by the invention;
FIG. 10 is a schematic structural view (an example is an O-shaped schematic) of another embodiment of a single sealing packing in a millstone-type material conveying valve with a self-tightening sealing valve rod provided by the invention;
fig. 11 is a schematic structural diagram (illustrated in a C-shape) of another embodiment of a single sealing packing in a valve stem self-tightening sealing millstone type material conveying valve provided by the invention.
Reference numerals: 1. a valve cover; 2. a first clamping ring; 3. a sealing unit; 30. a spacer ring member; 31. a first transition portion; 32. a second transition portion; 33. a lip seal; 4. a second clamping ring; 5. a valve stem; 6. a cylinder connecting plate; 7. a valve body; 8. a rotating arm; 9. a valve plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Finally, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise direct contact between the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a millstone-type material conveying valve with a self-tightening sealing valve rod according to an embodiment of the present invention. The grinding disc type material conveying valve with the self-tightening sealing valve rod comprises a valve body 7 and a valve cover 1, wherein the valve body 7 is fixedly connected with the valve cover 1 to form a valve cavity, the upper end of the valve rod 5 is fixedly connected with a cylinder connecting plate 6, the lower end of the valve rod 5 is fixedly connected with a rotating arm 8, and the rotating arm 8 is movably connected with the valve plate 7. In actual operation, the air cylinder drives the valve rod 5 and the rotating arm 8 to rotate through the air cylinder connecting plate 6, so as to drive the valve plate 9 to operate to open and close the valve.
Specifically, a bonnet hole is formed at one side of the bonnet 1, the valve rod 5 is inserted into the bonnet hole, and a self-tightening sealing member is accommodated in a space between an outer peripheral wall of the middle portion of the valve rod 5 and an inner side wall of the bonnet hole. Wherein, the self-tightening sealing component comprises a first pressing ring 2, a second pressing ring 4 and a sealing unit 3 arranged between the first pressing ring 2 and the second pressing ring 4; the first pressing ring 2 and/or the second pressing ring 4 can push the sealing unit 3 to automatically compensate under the pressure from the conveyed material, so that the sealing unit 3 forms a self-tightening seal for the valve rod.
Preferably, the valve cover 1 has a boss extending outwards on the outer side, the valve cover hole is a hollow cylinder hole formed in the boss part and the valve cover part, and the inner wall of the hollow cylinder is a stepped accommodating area; the middle part of the valve rod 5 penetrates through the ladder-shaped accommodating area; the stepped accommodating area comprises a first cylindrical area and a second cylindrical area, and the first cylindrical area is positioned below the second cylindrical area; the internal diameter of the first cylindrical region is equal to the diameter of the valve stem 5 (which may not be exactly equal in practice, leaving a clearance for later assembly in a clearance fit); the second cylindrical region has an inner diameter greater than the diameter of the valve stem 5 and an annular gap between the second cylindrical region and the valve stem 5 is formed to accommodate the self-sealing member.
Preferably, the sealing unit 3 is an annular packing structure having a predetermined cross-sectional shape, the annular packing structure including a first engagement surface and a second engagement surface; the first pressing ring 2 comprises a first pressing ring main body part and a first pressing ring joint part which are integrally formed; the second clamping ring 4 includes a second clamping ring main body portion and a second clamping ring engaging portion which are integrally formed. The first pressing ring joint part has a first surface shape matched with the first joint surface so as to be mutually embedded and contacted with the first joint surface; the second pressing ring joint part has a second surface shape matched with the second joint surface, so that the second pressing ring joint part and the second joint surface are mutually embedded and contacted.
Referring to fig. 2-7, the first to sixth structural schematic diagrams of the self-tightening sealing member in the valve stem self-tightening sealing millstone type material conveying valve provided by the invention are shown. Here, fig. 2 to 7 correspond to the case where the predetermined cross-sectional shapes of the annular packing structures of the seal units in the self-tightening seal member are respectively a horizontal V-shape, a C-shape, an X-shape, a star-shape, a "ji" shape, and an O-shape.
In one embodiment, as can be seen from fig. 2 to 3, when the predetermined cross-sectional shape of the sealing unit 3 is a horizontal V-shape or C-shape, the cross section of the annular packing structure of the sealing unit 3 is a trapezoidal shape as a whole, and a horizontal V-shaped groove or C-shaped groove is formed in one bottom surface (a bottom surface facing the side of the valve rod 5) of the trapezoidal shape, and the opening of the horizontal V-shaped groove or C-shaped groove is disposed facing the shaft portion of the valve rod 5, inclined surfaces at two sides of the trapezoidal shape are respectively used as the first joint surface and the second joint surface, and the first clamping ring joint portion and the second clamping ring joint portion are both wedge-shaped structures, and the wedge-shaped surfaces of the wedge-shaped structures are in matching contact with the first joint surface and the second joint surface.
When the preset cross section of the sealing unit 3 is in a horizontal V shape or a C shape, the sealing unit 3 is in a sealing lip structure by removing the residual part of the horizontal V-shaped groove or the C-shaped groove on the surface facing the valve rod 5, after the sealing unit 3 bears the pressure from the pressing ring, the sealing lip structure is easier to deform, the deformation direction enables the lip to cling to the outer circular surface of the valve rod 5, so that the lip part and the valve rod 5 always keep a tight sealing state, and finally the purpose of self-tightening sealing is achieved.
In one embodiment, as can be seen from fig. 4 to 5, when the predetermined cross-sectional shape of the sealing unit 3 is an X-shape or a star-shape, the cross-section of the annular packing structure of the sealing unit 3 is entirely in an X-shape structure or a four-corner star-shape structure, and the X-shape structure or the four-corner star-shape structure has four rounded concave surfaces, two rounded concave surfaces are respectively located right above and right below, the other two rounded concave surfaces are respectively located right left and right, i.e. the rounded concave surface located right left faces the valve stem 5, and the rounded concave surface located right faces the valve cap 1. The smooth concave surfaces positioned right above and right below are respectively used as the first joint surface and the second joint surface, the first pressing ring joint part and the second pressing ring joint part are both smooth convex structures, and the smooth convex structures are in matched contact with the first joint surface and the second joint surface.
When the preset cross section of the sealing unit 3 is in an X-shaped or star-shaped shape, the sealing unit 3 in the shape forms a symmetrical lip structure at the direction side close to the valve rod 5 and the opposite side; after the sealing unit 3 bears the pressure from the pressing ring, the smooth convex structure of the pressing ring joint part is abutted with the bearing force of the smooth concave surface of the sealing unit 3, so that the lips at the four corners of the sealing unit 3 in the shape are easily expanded outwards, the lips are always kept in a tight sealing state with the valve rod 5, and finally the purpose of self-tightening sealing is achieved.
In one embodiment, as can be seen from fig. 6, when the predetermined cross-sectional shape of the sealing unit 3 is "a-letter", the cross-section of the annular packing structure of the sealing unit 3 entirely assumes a "a-letter" structure formed by symmetrically folding a unitary packing block from a central portion, the "a-letter" structure having two curved concave surfaces as the first joint surface and the second joint surface, and the first clamping ring joint portion and the second clamping ring joint portion are both chamfered structures that are in mating contact with the first joint surface and the second joint surface.
Preferably, the sealing unit 3 may further comprise several sealing packing elements and at least one spacer ring 30 for the several sealing packing elements. The first pressing ring 2 and the second pressing ring 4 can be respectively in press contact with different sealing filler single pieces in the plurality of sealing filler single pieces.
That is, the sealing unit 3 may be a combination of a plurality of sealing packing single pieces.
Referring to fig. 8, a one-piece assembly of an O-ring seal packing is shown in fig. 8. It should be understood that although the present application only shows a schematic combination of single pieces of O-shaped packing, it does not imply that the sealing unit 3 formed by combining several single pieces of packing in the technical solution disclosed in the present application is only suitable for O-shaped sealing units, but rather that the combination is also suitable for horizontal V-shaped, C-shaped, X-shaped, star-shaped, "inverted" and O-shaped sealing units.
In a preferred embodiment, and with particular reference to FIGS. 9-10, the present invention provides a seal packing single piece construction of a particular construction, with FIG. 9 showing an X-shape and FIG. 10 showing an O-shape.
The single sealing filler piece in this embodiment has a hollow air bag structure inside the single sealing filler piece, and when the single sealing filler piece is subjected to a pressing force, the hollow air bag structure provides a rebound force, and the rebound force and the pressing ring pressure act on the single sealing filler piece together to better convert the vertical deformation (axial direction) of the single sealing filler piece into the transverse deformation (radial direction), so that the single sealing filler piece performs compensation sealing on the valve rod.
It should be understood that while fig. 9 and 10 only show a single piece of sealing packing having an X-shape and an O-shape of the hollow bladder structure, a single piece of sealing packing having a hollow bladder structure is equally applicable to other shapes disclosed herein, such as a transverse V-shape, a C-shape, etc.
Therefore, as can be seen from the above, the overall shape of the single sealing filler piece (the sealing unit 3 is similar) may be a single structure of a horizontal V-shape, a C-shape, an X-shape, a star-shape, a "ji" shape and an O-shape, or a shape having a hollow air bag structure inside at the same time.
Specifically, the hollow airbag structure at least comprises a hollow traceless airbag and an inner layer structure for coating the hollow traceless airbag from inside to outside in sequence, and can also comprise an outer layer structure for coating the inner layer structure.
Preferably, the material of the inner layer structure may be an elastomeric material capable of maintaining good performance characteristics over a temperature range of-60 ℃ to 325 ℃; the material of the outer layer structure can be a high-molecular thermoplastic material, and the high-molecular thermoplastic material can also keep good working characteristics in the temperature range of-60-325 ℃.
Referring to fig. 11, as a more preferred embodiment, the single piece of sealing filler may further include a thermoplastic material near the joint surface, and the thermoplastic material of the portion may form a transition portion, specifically, a first transition portion 31 and a second transition portion 32, on the side surface of the single piece of sealing filler; the first pressing ring and the second pressing ring (2 and 4) are utilized to push the sealing lips on the two sides of the single sealing filler piece to move towards the vacancy in the center part to generate the locking of the valve rod, and the vacancy is also beneficial to preventing the valve rod from being locked when the valve rod is sealed in a self-tightening way. Similarly, the lip position can also be compounded with thermoplastic material to form the lip seal 33. In this embodiment, the coefficient of friction of the thermoplastic material is less than the predetermined coefficient of friction threshold, which is about thirty to one-fiftieth of that of a conventional sealing material, so that when the valve is in operation, the sealing packing is in a compressed state, the friction force applied to the working surface is small and the radial force applied to the valve stem is large enough. The sealing element can realize normal sealing without failure under the environment of high temperature of 360 ℃ and low temperature of-60 ℃ because the material is a thermoplastic material with low friction coefficient, and the friction coefficient is only 0.03-0.1, so that the power loss of the sealing element to the valve is low although the radial force is large and the sealing is tight enough, thereby reducing the abrasion between the sealing unit and the valve rod and forming a comprehensive compensation seal.
Preferably, in order to ensure the sealing compensation of the single sealing filler piece, the specific parameters are that the opening dimension D on the sealing surface side of the single sealing filler piece is about 1/3-1/2 of the whole side dimension D, the filling rate of the vacant space and the compression self-tightening state is about 75%, and 25% of filling margin can support the abrasion of the sealing lip, so that the service life of the valve can be kept long enough.
It will be appreciated that the single piece of sealing packing incorporating thermoplastic material is not only suitable for use in a C-shape, but other shapes are equally suitable.
During the intermittent rotation of the valve rod 5, the valve rod 5 and the packing in the sealing unit 3 are worn and have insufficient radial force, and at the moment, under the continuous pushing of the pressure provided by the conveyed medium material, the first clamping ring 2 and/or the second clamping ring 4 can make the packing of the sealing unit 3 automatically compensate adaptively, so that the packing can compensate the packing to the worn area in time, at the same time, the sealing unit 3 is pushed to form radial force with adaptive magnitude to the valve rod so that the sealing unit 3 forms a seal to the pore space of the valve rod in a self-tightening way, i.e. the first pressure ring 2 and/or the second pressure ring 4 push the sealing unit 3 to compress, so that the radial force exerted by the sealing unit 3 on the valve stem 5 is adapted to change, thus ensuring that the specific sealing pressure between the valve rod 5 and the sealing unit 3 is matched to the pressure from the conveying medium material. When the pressure of the conveyed medium material is higher, in order to avoid the medium material from leaking, the sealing specific pressure between the valve rod 5 and the sealing unit 3 needs to be increased, but because the increase of the pressure of the conveyed medium material can form stronger pushing on the first pressing ring 2 and/or the second pressing ring 4, the packing of the sealing unit 3 is further compressed correspondingly, higher sealing specific pressure is naturally generated, and finally, the active automatic sealing effect on the valve rod is realized.
Preferably, the first press ring 2 and the second press ring 4 are made of an elastic organic polymer;
preferably, the sealing unit 3 is made of an organic material having high molecular thermoplasticity and viscoelasticity;
preferably, the materials of the first pressing ring 2, the second pressing ring 4 and the sealing unit 3 have low hardness, low friction coefficient and good heat resistance, which can effectively avoid the first pressing ring 2, the second pressing ring 4 and the sealing unit 3 from wearing the valve rod and ensure that the first pressing ring 2, the second pressing ring 4 and the sealing unit 3 can work normally under high-temperature and high-pressure environment.
From the above description of the embodiments, the valve stem self-sealing material delivery valve adopts the self-sealing component with self-sealing property to dynamically seal the valve stem; the self-tightening sealing component can adaptively adjust the sealing specific pressure of the self-tightening sealing component on the valve rod along with the pressure of the conveyed medium material, so that dynamic and active self-tightening sealing adjustment is realized, and the self-tightening sealing function of the valve rod and the component is realized; the self-tightening sealing component also has the function of automatic compensation, and when a gap is generated due to abrasion of a filler corresponding to the valve rod, the self-tightening sealing component can automatically compensate and fill the gap under the pushing of the pressure of the medium material, so that the self-tightening sealing component always forms a tight holding seal on the valve rod; the self-tightening sealing component can effectively ensure that the valve does not have the condition of medium material leakage, so that the valve can not have the problems of environment pollution and influence on the body health of operators due to the leakage of pulverized coal ash slag after long-time operation, and is an optimal environment-friendly product for a thermal power plant; the material performance that this valve rod self-tightening sealed material delivery valve used is excellent, structurally has initiative automatic compensation's function again, and make the self-tightening sealing member have less radial force and do not have wearing and tearing to the valve rod axial region, thereby make material delivery valve's air supply power loss little and leakproofness reliable, this is favorable to prolonging the life of whole machine of valve and reduces the time of machine halt maintenance, in addition, this valve rod self-tightening sealed material delivery valve still has simple structure, the low price and be convenient for advantages such as maintenance change.
Claims (10)
1. The millstone type material conveying valve with the self-tightening sealing valve rod comprises a valve cover and a valve rod,
the valve cover is provided with a valve cover hole, the valve rod penetrates through the valve cover hole, a self-tightening sealing component is accommodated in a space between the outer peripheral wall of the valve rod and the inner side wall of the valve cover hole,
the method is characterized in that:
the self-tightening sealing member comprises a first pressing ring, a second pressing ring and a sealing unit arranged between the first pressing ring and the second pressing ring;
the first pressing ring and/or the second pressing ring can push the sealing unit to automatically compensate under the pressure from conveyed materials, so that the sealing unit forms self-tightening sealing on the valve rod.
2. The burr type material transfer valve of claim 1, wherein:
the outer side of the valve cover is provided with a boss extending outwards, the valve cover hole is a hollow cylinder hole formed in the boss part and the valve cover part, and the inner wall of the hollow cylinder hole is provided with a step-shaped accommodating area;
the middle part of the valve rod penetrates through the stepped accommodating area;
the stepped accommodating area comprises a first cylindrical area and a second cylindrical area, and the first cylindrical area is positioned below the second cylindrical area; wherein the content of the first and second substances,
the inner diameter of the first cylindrical region is equal to the diameter of the valve stem;
the second cylindrical region has an inner diameter larger than a diameter of the valve stem, and an annular gap between the second cylindrical region and the valve stem forms the space for accommodating the self-tightening sealing member.
3. The burr type material transfer valve of claim 1, wherein:
the sealing unit is an annular packing structure with a preset cross-sectional shape, and the annular packing structure comprises a first joint surface and a second joint surface;
the first pressing ring comprises a first pressing ring main body part and a first pressing ring joint part which are integrally formed;
the second pressing ring comprises a second pressing ring main body part and a second pressing ring joint part which are integrally formed;
the first pressing ring joint part has a first surface shape matched with the first joint surface, so that the first pressing ring joint part and the first joint surface are mutually embedded and contacted;
the second clamping ring joint part has a second surface shape matched with the second joint surface, so that the second clamping ring joint part and the second joint surface are mutually embedded and contacted.
4. The burr type material transfer valve of claim 3, wherein:
the preset cross section of the annular packing structure is in any one of a horizontal V shape, a C shape, an X shape, a star shape, a 'Ji' shape and an O shape.
5. The burr type material transfer valve of claim 4, wherein:
when the preset cross section is in an inverted V shape or a C shape, the first clamping ring joint part and the second clamping ring joint part are both in a wedge-shaped structure, and the first joint surface and the second joint surface are both inclined surfaces matched with the wedge-shaped structure;
alternatively, the first and second electrodes may be,
when the preset cross section is in an X-shaped or star-shaped shape, the first clamping ring joint part and the second clamping ring joint part are both smooth convex structures, and the first joint surface and the second joint surface are both smooth concave surfaces matched with the smooth convex structures;
alternatively, the first and second electrodes may be,
when the preset cross section is in a shape of a Chinese character 'ji', the first pressing ring joint part and the second pressing ring joint part are both in a chamfer structure, and the first joint surface and the second joint surface are both curved concave surfaces matched with the chamfer structure;
alternatively, the first and second electrodes may be,
when the preset cross section is O-shaped, the first pressing ring joint part and the second pressing ring joint part are of concave arc structures, and the first joint surface and the second joint surface are convex arc surfaces matched with the concave arc structures.
6. The millstone-type material conveying valve according to any one of claims 1 to 5, characterized in that:
the sealing unit comprises a plurality of sealing filler single pieces and at least one spacer ring piece for the sealing filler single pieces;
the first pressing ring and the second pressing ring are respectively in press fit contact with different sealing filler single pieces in the plurality of sealing filler single pieces.
7. The burr type material transfer valve of claim 6, wherein:
each of the sealing filler single pieces is provided with a hollow air bag structure, the hollow air bag structure is located inside the sealing filler single piece, and when the sealing filler single piece bears extrusion force, the vertical deformation of the sealing filler single piece is converted into transverse deformation through the hollow air bag structure, so that the sealing filler single piece can compensate and seal the valve rod.
8. The burr type material transfer valve of claim 7, wherein:
the hollow air bag structure at least comprises a hollow traceless air bag and an inner layer structure for coating the hollow traceless air bag from inside to outside; wherein, the material of the inner layer structure is an elastomer material.
9. The burr type material transfer valve of claim 1, wherein:
the first and/or second clamping ring causing the sealing unit to form a self-sealing seal against the valve stem comprises,
the first pressing ring and/or the second pressing ring push the sealing unit to compress so that the radial force applied by the sealing unit to the valve rod can be changed adaptively, and therefore the specific sealing pressure between the valve rod and the sealing unit is guaranteed to be matched with the pressure from the conveyed material.
10. The burr type material transfer valve of claim 1, wherein:
the first pressing ring and the second pressing ring are made of elastic organic polymers;
alternatively, the first and second electrodes may be,
the sealing unit is made of an organic material having thermoplasticity and viscoelasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259924.8U CN210372277U (en) | 2019-08-06 | 2019-08-06 | Abrasive disc type material conveying valve with self-tightening sealing valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259924.8U CN210372277U (en) | 2019-08-06 | 2019-08-06 | Abrasive disc type material conveying valve with self-tightening sealing valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210372277U true CN210372277U (en) | 2020-04-21 |
Family
ID=70248952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921259924.8U Active CN210372277U (en) | 2019-08-06 | 2019-08-06 | Abrasive disc type material conveying valve with self-tightening sealing valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210372277U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307392A (en) * | 2019-08-06 | 2019-10-08 | 四川省科能工业设备制造有限公司 | The millstone type material conveying valve of valve rod self-tightening sealing |
-
2019
- 2019-08-06 CN CN201921259924.8U patent/CN210372277U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307392A (en) * | 2019-08-06 | 2019-10-08 | 四川省科能工业设备制造有限公司 | The millstone type material conveying valve of valve rod self-tightening sealing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210372277U (en) | Abrasive disc type material conveying valve with self-tightening sealing valve rod | |
| CN203880093U (en) | Sealing ring | |
| CN201027978Y (en) | Container type mechanical seal with sealing ring | |
| CN109780212A (en) | Sealing element | |
| CN203670792U (en) | Elastic filler and valve using the filler | |
| CN102588610A (en) | Hydraulic cylinder with sealing follow-up device | |
| CN208686993U (en) | A kind of ball valve with valve body self-sealing mechanism | |
| CN204755916U (en) | Exoskeletal rubber oil seal of lips mouth J type | |
| CN206299844U (en) | A kind of high-pressure check valve of low leakage | |
| CN115126877A (en) | Low-leakage long-life floating ring sealing device | |
| CN212273242U (en) | Sliding type valve rod sealing device of gate valve of hot blast stove not prone to leakage | |
| CN208041208U (en) | A kind of sealing structure of ultralow temperature ball valve base and valve body | |
| CN207213167U (en) | A kind of piston rod sealing ring | |
| CN105443785A (en) | Energy-increased elastic sealing valve structure and double-eccentric butterfly valve applying same | |
| CN105864439A (en) | Regulating type metal sealed butterfly valve | |
| CN221075213U (en) | Mechanical seal structure in horizontal filter tank | |
| CN219932951U (en) | Rotary shaft sealing element | |
| CN205013842U (en) | Air damper is compound bearing seal of sound for axle | |
| CN204805610U (en) | Removable self -tightening high temperature valve seat seal structure of track ball valve | |
| CN213332373U (en) | Flexible sealing structure of movable part | |
| CN2210974Y (en) | Automatic-compensation v-shaped combination sealing unit | |
| CN205780884U (en) | A kind of efficient shaft mechanical seal structure | |
| CN212986035U (en) | High-pressure oil seal | |
| CN204922151U (en) | Big lid of rotary valve seals packing | |
| CN210034444U (en) | Novel flue gas valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |