CN210318570U - Novel detachable pure metal butterfly valve double-included-angle sealing pair - Google Patents
Novel detachable pure metal butterfly valve double-included-angle sealing pair Download PDFInfo
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- CN210318570U CN210318570U CN201921161823.7U CN201921161823U CN210318570U CN 210318570 U CN210318570 U CN 210318570U CN 201921161823 U CN201921161823 U CN 201921161823U CN 210318570 U CN210318570 U CN 210318570U
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Abstract
The utility model discloses a novel detachable pure metal butterfly valve double-included-angle sealing pair, which comprises a valve seat sealing ring, wherein the contour lines of a mounting hole at two ends of a valve seat are an ellipse I and an ellipse II respectively, and two points on the ellipse I, which are radially vertical to the axis of a valve rod, are an A point and a C point respectively; along the axial direction of the valve seat, points corresponding to the point A and the point C on the ellipse II are respectively a point B and a point D, and the distance from the line segment AB to the axis of the valve seat is gradually increasedIncreasing, the distance of the line segment CD from the axis of the valve seat gradually decreases, and the slope k of the straight line segment ABaSlope k of the straight line segment CDb. The utility model can realize forced bidirectional zero-leakage sealing, and completely eliminate scraping phenomenon when the butterfly plate is opened and closed; simultaneously the utility model discloses a vice whole dismantlement formula of sealing is fixed on the valve, and its interchangeability is good, the maintenance is convenient.
Description
Technical Field
The utility model relates to a butterfly valve technical field, concretely relates to novel detachable pure metal butterfly valve double clip angle is sealed vice.
Background
The butterfly valve is used as a part for realizing the on-off and flow control of a pipeline system, is widely applied in various fields of petroleum, chemical industry, metallurgy, water and electricity and the like, the development of the butterfly valve is continuously evolved from a center butterfly valve and double eccentricity to triple eccentricity due to the huge requirements of various working conditions in the market, only a few manufacturers in China can design and manufacture the forced sealing ultralow-temperature butterfly valve so far, the reliability of the manufactured product is low, the sealing grade can only reach FCI/70-2Class V generally, and the working condition requirement of the TSO tightness of the valve cannot be met. Compared with foreign products, the difference is very large no matter the material technology or the design technology, and the domestic market is favored with foreign brands for butterfly valves under severe working conditions such as ultralow temperature.
The butterfly valve sealing pair technology is a key technology of butterfly valve products, and most of the mainstream butterfly valve products in the market at present adopt a multilayer metal sealing structure, and the structure has the main defects of poor wear resistance, short service life, poor low-temperature performance, incapability of realizing bidirectional sealing, large valve torque, poor interchangeability of sealing parts and the like, so the butterfly valve sealing pair technology is not suitable for being used under severe working conditions of bidirectional sealing, low temperature and the like. Meanwhile, the technical problem of zero leakage of bidirectional sealing is not really solved by the ultralow-temperature metal hard sealing butterfly valve in the current market, and especially the reliability of the product is urgently to be improved.
The butterfly valve mainly comprises the following components according to the structure: concentric butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves, and triple eccentric butterfly valves. The butterfly plate of the concentric butterfly valve can extrude with the valve seat to damage the sealing pair. Therefore, to solve the problem of the pressing of the butterfly plate of the concentric butterfly valve against the valve seat, a single eccentric butterfly valve has been produced. The single eccentric butterfly valve is characterized in that a butterfly plate is arranged on the basis of a concentric butterfly valveThe centre line of rotation (i.e. the axis of the valve stem) being arranged to form a dimensional deviation L from the sealing cross-section1I.e. the valve stem axis is offset from the butterfly plate center. The double eccentric butterfly valve is based on single eccentric butterfly valve, the valve rod axis deviates from the center of butterfly plate and valve body, and the valve rod axis and the valve body center form one size deviation L2The triple eccentric butterfly valve is characterized in that one side of the double eccentric butterfly valve is a conical surface seal with two symmetrical sides is changed into a plane seal which is parallel to the axis of the valve body, so that the included angle of the sealing surfaces at the two sides is not on the axis of the valve body and forms an included angle with the axis of the valve body, so that the center line between the sealing surfaces at the two sides in the cross section (namely the bisector of the included angle between the sealing surfaces at the two sides) forms an angular offset with a certain angle β with the center line of the valve seat (namely the center line of the valve body), namely the sealing section of the butterfly plate is not a true circle but an ellipse, the shape of the sealing surface is also asymmetric, one side is inclined to the center line of the valve body, and the other side is parallel to the center line of the valve body.
The more eccentric parameters of the butterfly valve, the better the sealing performance, but the more complex the geometrical parameters, the more difficult the manufacture and the more expensive the manufacture.
Disclosure of Invention
The utility model aims to provide a: the utility model provides a novel detachable pure metal butterfly valve double clip angle is sealed vice, has solved the sealed vice of current butterfly valve, for the high-efficient sealing of demand, must increase the technological prejudice of more eccentric parameter. The utility model discloses the sealed position to one side in sealed pair has carried out novelty and ingenious design to make this sealed pair can realize the compulsory sealed effect in the current triple offset butterfly valve, can cancel this eccentric settings of the skew valve body central line in valve rod axle center again, make valve rod axis and valve body central line coincidence, reduce the valve body manufacturing cost who has the compulsory sealed effect, improve its assembly convenience.
The utility model adopts the technical scheme as follows:
a novel detachable double-included-angle sealing pair of a pure metal butterfly valve comprises a valve seat and a sealing ring, wherein the valve seat is installed in a valve cavity of the butterfly valve, the sealing ring is installed on a butterfly plate, the outer side wall of the sealing ring is in sealing fit with the hole wall of an installation hole of the valve seat, the cross section of the installation hole is oval, the contours of the installation hole on the end face, close to a valve rod of the butterfly valve, of the valve seat and on the end face, far away from the valve rod, of the valve seat are oval I and oval II respectively, two points on the oval I, which are radially perpendicular to the axis of the valve rod, are an A point and a C point respectively, and the C; along the axial direction of the valve seat, points corresponding to the point A and the point C on the ellipse II are respectively a point B and a point D, a connecting line between the point A and the point B is a line segment AB, the distance from the line segment AB to the axis of the valve seat is gradually increased from the point A to the point B, a connecting line between the point C and the point D is a line segment CD, the distance from the line segment CD to the axis of the valve seat is gradually decreased from the point C to the point D, and the slope k of the straight line segment AB is gradually decreasedaSlope k of the straight line segment CDb；
The shape and the size of the cross section of the outer side wall of the sealing ring are consistent with those of the corresponding cross section of the mounting hole.
In the three-eccentric butterfly valve in the prior art, the distance between a segment CD and a valve seat axis is unchanged, namely the segment CD is a segment parallel to the valve seat axis, so that the center line of an included angle between the segment CD and a segment AB and the valve body center line form an included angle of a center line with an angle β offsetThe segments AB are tapered and eliminated from each other, and the scratch damage at the segment CD is the most severe of the entire seal. Therefore, in order to reduce the scraping damage, the axis of the valve rod is required to be deviated from the center line of the valve body and is close to the line segment AB, namely, the axis of the valve rod and the center of the valve body form a size deviation L2Therefore, the part matched with the CD on the sealing ring has a higher linear speed, and then when the butterfly plate is opened, the part matched with the CD on the sealing ring obtains a higher speed of leaving the CD, so that the butterfly plate can be separated from the valve seat after the valve is opened, and the scraping phenomenon between the butterfly plate and the valve seat in the opening and closing process is reduced as much as possible.
In the utility model, the line segment CD is set to be a line segment which is gradually reduced from the distance of the valve seat axis, and the line segment is not a line segment which is symmetrical to the line segment AB about the valve seat axis in the concentric, single eccentric and double eccentric valve bodies, and is not a line segment which is parallel to the valve seat axis in the triple eccentric, but is the same with the slant of the line segment AB, but the slope is lower than that of the line segment AB, namely, the utility model discloses a point which is close to the valve seat axis at the line segment CD, namely, a reference line which is parallel to the valve seat axis is made at the point C, and the line segment AB and the reference line form an included angle which is a first included angle and is used for generating the angle offset for the original triple eccentric butterfly valve; meanwhile, the line segment CD and the reference line form an included angle, and the included angle is an included angle two, which is an increased included angle of the utility model.
When actual layout, because the setting of contained angle two adopts the utility model discloses a butterfly valve, its valve rod axis is crossing with the valve body axis, has cancelled an eccentric parameter, so that adopts the utility model discloses a butterfly valve structure that sealed is vice is simpler, the complexity of geometric parameter reduces, makes easier, manufacturing cost reduces. Specifically, the utility model discloses when opening the butterfly plate, in case rotate the butterfly plate, the position that corresponds with line segment CD on the sealing washer promptly immediately leaves line segment CD, can realize breaking away from of complete nothing scraping rapidly between the disk seat of line segment CD department promptly and the sealing washer. Specifically, the points corresponding to the point C and the point D on the sealing ring are the point C 'and the point D', respectively, when the butterfly plate is opened, the point C 'rotates around the valve rod axis to the point D, i.e. to the farther position from the valve seat axis on the hole wall of the mounting hole, i.e. when the butterfly plate is closed, the point C' contacts with the closer position from the valve seat axis on the valve seat, and after the butterfly plate is opened, the point C rotates to the farther position from the valve seat axis, so that the sealing ring designed by the utility model can be separated from the valve seat at the moment when the butterfly plate is opened, the scraping phenomenon generated when the butterfly plate is opened and closed is completely eliminated, zero friction in the opening process is realized, the sealing surface is prevented from being scraped and damaged, the high efficiency of the sealing performance between the sealing ring and the valve seat is ensured, the torque required by the opening and closing valve is greatly reduced, thereby facilitating the adoption of an actuator with, and its volume of its executor that the moment of torsion is little also, does benefit to the adoption the utility model discloses an installation of the vice valve of sealing.
To sum up, the utility model discloses seal structure between sealing washer and the disk seat for the butterfly valve carries out innovative design, on having the contained angle one of the line segment AB side originally, so that it keeps the compulsory sealed basis of original position, still through at line segment CD department innovative set up contained angle two, when the butterfly plate is closed, produce the compulsory seal at line segment CD department, thereby make whole disk seat and sealing ring form the conjugate seal pair, namely form the central point of two compulsory seals at line segment AB department and line segment CD department, and from these two central points along the oval contour upper and lower both sides radiation, in order to realize the compulsory two-way zero leakage and seal; when the butterfly plate is opened, the whole sealing ring can be separated from the whole valve seat instantly, the phenomenon of scraping generated when the butterfly plate is opened and closed is completely eliminated, the quality of a sealing surface is ensured, and the stability of the sealing performance is ensured; simultaneously, based on the special setting at line segment CD position, still be convenient for adopt the utility model discloses a skew between valve cancellation valve rod axle center and the valve body central line of sealed pair can make valve rod axis and valve body central line intersect perpendicularly, has eliminated the sealed pair of current butterfly valve, must increase the technological bias of more eccentric parameter for the high-efficient sealed of demand. The utility model discloses a setting to sealed vice structure to make this sealed vice valve of adoption cancel an eccentric parameter, so that adopt the utility model discloses a sealed vice butterfly valve structure is simpler, geometric parameter's complexity reduces, makes easier, manufacturing cost reduces.
Due to the adoption of the technical scheme, the beneficial effects of the utility model are that:
1. the utility model relates to a novel detachable pure metal butterfly valve double clip angle sealing pair, seal structure between sealing washer and the disk seat that is used to butterfly valve carries out innovative design, have the contained angle one of original line segment AB side, on the basis of the compulsory sealed of making it keep the original position, still set up contained angle two through the novelty in line segment CD department, when the butterfly plate is closed, produce the compulsory sealed in line segment CD department, thereby make whole disk seat and sealing ring form the conjugate sealing pair, form the central point of two compulsory sealed in line segment AB department and line segment CD department, and from these two central points along the oval contour upper and lower both sides radiation, in order to realize the two-way zero leakage of force is sealed;
2. the utility model relates to a novel detachable pure metal butterfly valve double clip angle sealing pair, when opening the butterfly plate, can realize the break away from of sealing washer and disk seat instantaneously, can produce the phenomenon of scraping when having eliminated the switching butterfly plate completely, guaranteed the quality of sealed face, guaranteed the stability of sealing performance, greatly reduced the required moment of torsion of switching valve to be convenient for adopt the executor that the moment of torsion is less, reduce the cost of executor, and the executor that the moment of torsion is little its volume is also little, do benefit to adopting the utility model discloses a mounting of the valve of sealing pair;
3. the utility model relates to a novel detachable pure metal butterfly valve double clip angle sealing pair, based on the special setting of line segment CD position, still be convenient for adopt the utility model discloses a valve of sealing pair cancels the skew between valve rod axle center and the valve body central line, can make valve rod axis and the perpendicular crossing of valve body central line, eliminated in the sealing pair of current butterfly valve, must increase the technological bias of more eccentric parameter for the high-efficient sealing of demand, so that the valve that adopts this sealing pair cancels an eccentric parameter, so that the butterfly valve that adopts the sealing pair of the utility model designed structure simpler, the complexity of geometric parameter reduces, it is easier to make, manufacturing cost reduces;
4. the utility model relates to a novel detachable pure metal butterfly valve double clip angle is sealed vice, the sealing ring compresses tightly on the butterfly plate through butterfly plate clamping ring, and the sealing ring passes through first screw fastening on the butterfly plate, when the sealing ring sealed the inefficacy, need not to replace the butterfly plate wholly, only need the pertinence replace the sealing ring that became invalid can, can save maintenance time and cost greatly;
5. the utility model relates to a novel detachable pure metal butterfly valve double-included-angle sealing pair, a butterfly plate compression ring is fastened on a butterfly plate through an inner hexagon screw, and simultaneously, a pretightening force is applied through a first inner hexagon screw to compress a graphite gasket to realize the sealing between a sealing ring and the butterfly plate so as to ensure the high-efficiency sealing between the sealing ring and the butterfly plate;
6. the utility model relates to a novel detachable pure metal butterfly valve double-included-angle sealing pair, when the valve seat sealing is invalid, the whole valve body does not need to be replaced, only the invalid valve seat needs to be replaced in a targeted manner, and the maintenance time and the cost can be greatly saved;
7. the utility model relates to a novel two contained angle of detachable pure metal butterfly valve are sealed vice applies the pretightning force through hexagon socket head cap screw in the second, compresses tightly the disk seat on the graphite gasket, realizes sealing between disk seat and the valve body boss to ensure the high-efficient leakproofness between disk seat and the boss.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts, and the proportional relationship of each component in the drawings in the present specification does not represent the proportional relationship in the actual material selection design, and is only a schematic diagram of the structure or the position, in which:
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic structural view of a longitudinal section of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a schematic structural view of the cross section of the present invention;
FIG. 5 is an enlarged view at B in FIG. 4;
FIG. 6 is an enlarged view at C in FIG. 4;
FIG. 7 is an enlarged view at D of FIG. 6;
FIG. 8 is a schematic view of the valve seat and sealing ring mating;
FIG. 9 is a front view of the valve seat;
FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9;
FIG. 11 is a cross-sectional view taken along line D-D of FIG. 9;
FIG. 12 is an enlarged view at E in FIG. 11;
FIG. 13 is a front view of the seal ring;
FIG. 14 is a cross-sectional view taken along line E-E of FIG. 13;
FIG. 15 is a cross-sectional view taken along line F-F of FIG. 13;
fig. 16 is an eccentric schematic view of the present invention;
FIG. 17 is a schematic view of the butterfly plate at a small angle of opening;
fig. 18 is an enlarged view at F in fig. 17.
Reference numerals in the drawings indicate:
1-valve seat, 2-sealing ring, 3-outer side wall, 4-mounting hole, 5-ellipse I, 6-ellipse II, 7-A point, 8-C point, 9-B point, 10-D point, 11-butterfly plate, 12-step I, 13-valve rod, 14-step II, 15-butterfly plate press ring, 16-first screw, 17-boss, 18-first annular groove, 19-third open ring, 20-second screw, 21-right-angle groove, 22-C 'point, 23-D' point, 24-valve body, 25-plug, 26-bottom flange, 27-valve cavity, 28-graphite gasket, 29-valve seat axis and 30-reference line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
The present invention will be described in detail with reference to fig. 1 to 18.
Example 1
As shown in fig. 1-18, the utility model relates to a novel detachable pure metal butterfly valve double-included angle sealing pair, including valve seat 1 installed in the butterfly valve cavity and sealing ring 2 installed on butterfly plate 11, lateral wall 3 of sealing ring 2 is in sealing fit with the pore wall of mounting hole 4 of valve seat 1, the cross section of mounting hole 4 is oval, the contour of mounting hole 4 on the end face of valve seat 1 close to butterfly valve rod 13 and the end face far away from valve rod 13 is oval i 5 and oval ii 6 respectively, two points on oval i 5 and radially perpendicular to the axis of valve rod 13 are respectively point a 7 and point C8, point C8 is the position where point a5 rotates 180 degrees around the axis of valve seat 1 on oval i 5; along the axial direction of the valve seat 1, points corresponding to the point A7 and the point C8 on the ellipse II 6 are a point B9 and a point D10 respectively, a connecting line between the point A7 and the point B9 is a line segment AB, the distance from the line segment AB to the axis of the valve seat 1 is gradually increased from the point A to the point B, a connecting line between the point C8 and the point D10 is a line segment CD, the distance from the line segment CD to the axis of the valve seat 1 is gradually decreased from the point C to the point D, and the slope k of the straight line segment AB isaSlope k of the straight line segment CDb；
The cross section of the outer side wall 3 of the sealing ring 2 has the same shape and size with the corresponding cross section of the mounting hole 4, and the term "corresponding to the cross section" refers to the cross section of the outer periphery of each cross section of the outer side wall 3 and the outer periphery of the mounting hole 4 which are in fit contact.
In the three-eccentric butterfly valve of the prior art, as shown in fig. 1, the three eccentricities are that the axis of a valve rod deviates from the center of a butterfly plate, the axis of the valve rod deviates from the center of a valve body, and the center line between a sealing surface and the center line of the valve body forms an angle β with the center line of the valve body, in the three-eccentric butterfly valve of the prior art, the distance of a line segment CD from the axis of a valve seat 1 is unchanged, namely, the line segment CD is a line segment parallel to the axis of the valve seat 1, so that the center line of the included angle between the line segment CD and the line segment AB forms an angle β with the center line of the valve body, in the prior art, when the axis of the valve rod is in positive intersection with the axis of the valve body, the valve seat 1 and a sealing ring 2 at the line segment AB can be rapidly separated without scraping, a certain scraping can occur at the line segment CD, the scraping damage is gradually reduced and eliminated from the line segment CD to the line segment AB, the line segment CD is the most serious scraping damage in the whole sealing part, therefore2Therefore, the part matched with the CD on the sealing ring 2 has a higher linear speed, and then when the butterfly plate is opened, the part matched with the CD on the sealing ring obtains a higher speed of leaving the CD, so that the butterfly plate can be separated from the valve seat after the valve is opened, and the scraping phenomenon between the butterfly plate and the valve seat in the opening and closing process is reduced as much as possible.
In the utility model, the line segment CD is set to be a line segment which is gradually reduced from the axis of the valve seat 1, and the line segment is not a line segment which is symmetrical to the line segment AB about the axis of the valve seat in the concentric, single eccentric and double eccentric valve bodies, and is not a line segment which is parallel to the axis of the valve seat 1 in the triple eccentric, but is the same with the slant of the line segment AB, but the slope is lower than the slope of the line segment AB, namely, in the utility model, as shown in fig. 11, a point which is close to the axis of the valve seat 1 is arranged at the line segment CD, namely, a reference line 30 which is parallel to the axis of the valve seat 1 is arranged at the point C8, the line segment AB and the reference line 30 form an included angle, and the included angle is a first included angle which is used; meanwhile, the line segment CD forms an included angle with the reference line 30, and this included angle is an included angle two, which is an increased included angle of the present invention, i.e., an angle γ in fig. 6 and 7.
When actual layout, because the setting of contained angle two, adopt the utility model discloses a butterfly valve, its valve rod axis is crossing with valve body axis is normal, as shown in fig. 4. Specifically, the utility model discloses when opening the butterfly plate, in case rotate the butterfly plate, as shown in fig. 17 and fig. 18, the position that corresponds with line segment CD on the sealing washer 2 promptly immediately leaves line segment CD, can realize breaking away from of no scraping completely rapidly between the disk seat 1 of line segment CD department and the sealing washer 2 promptly. Specifically, the points on the sealing ring corresponding to the point C8 and the point D10 are a point C '22 and a point D' 23, respectively, when the butterfly plate is opened, the point C 'rotates around the axis of the valve stem to the point D, that is, to the farther part of the hole wall of the mounting hole from the axis of the valve seat 1, that is, when the butterfly plate is closed, the point C' contacts the closer part of the valve seat from the axis of the valve seat 1, and after the butterfly plate is opened, the point C rotates to the farther part from the axis of the valve seat 1, so that the sealing ring designed by the utility model can be separated from the valve seat at the same moment when the butterfly plate is opened, the scraping phenomenon generated when the butterfly plate is opened and closed is completely eliminated, zero friction in the opening process is realized, the sealing surface is prevented from being scraped and damaged, the high efficiency of the sealing performance between the sealing ring 2 and the valve seat 1 is ensured, the torque required by opening and closing the valve, reduce the cost of executor, and its volume that the moment of torsion is little is also little, does benefit to the adoption the utility model discloses an installation of sealed vice valve.
To sum up, the utility model discloses seal structure between sealing washer 2 and the disk seat 1 to the butterfly valve carries out innovative design, have the contained angle one of the line segment AB side originally, so that on the basis of the compulsory sealed of keeping original position, still through at line segment CD department novelty setting contained angle two, when the butterfly plate is closed, produce the compulsory sealed at line segment CD department, thereby make whole disk seat 1 and sealing ring 2 form the conjugate seal pair, form the central point of two compulsory sealed in line segment AB department and line segment CD department promptly, and from these two central points along the upper and lower both sides radiation of ellipse contour, in order to realize the two-way zero leakage of force and seal; when the butterfly plate is opened, the whole sealing ring can be separated from the whole valve seat instantly, the phenomenon of scraping generated when the butterfly plate is opened and closed is completely eliminated, the quality of a sealing surface is ensured, and the stability of the sealing performance is ensured; simultaneously, based on the special setting at line segment CD position, still be convenient for adopt the utility model discloses a skew between valve cancellation valve rod axle center and the valve body central line of sealed pair can make valve rod axis and valve body central line intersect perpendicularly, has eliminated the sealed pair of current butterfly valve, must increase the technological bias of more eccentric parameter for the high-efficient sealed of demand. The utility model discloses a setting to sealed vice structure to make this sealed vice valve of adoption cancel an eccentric parameter, so that adopt the utility model discloses a sealed vice butterfly valve structure is simpler, geometric parameter's complexity reduces, makes easier, manufacturing cost reduces.
Example 2
In this embodiment, a structure for fixing the seal ring 2 is explained based on embodiment 1.
As shown in fig. 2 and 3, the utility model discloses in the one end of butterfly plate 11 of butterfly valve is provided with the cylindrical step I12 that is used for supporting sealing ring 2, the cover is established on step I12 to sealing ring 2 one side of keeping away from butterfly valve rod 13 on step I12 is provided with the cylindrical step II 14 that the diameter is less than step I12 the cover is equipped with on step II 14 and compresses tightly butterfly plate clamping ring 15 on butterfly plate 11 with sealing ring 2, butterfly plate clamping ring 15 is fixed on step I12 through the first screw 16 of a plurality of.
Further, a graphite gasket is arranged between the sealing ring 2 and the butterfly plate 11.
The butterfly plate pressing ring 15 is fastened on the butterfly plate through the inner hexagon screws, and pretightening force is applied through the first inner hexagon screws to compress the graphite gasket, so that sealing between the sealing ring and the butterfly plate is realized, and efficient sealing between the sealing ring and the butterfly plate is ensured.
Preferably, the first screw 16 is a socket head cap screw.
Example 3
In the present embodiment, a fixing structure of the valve seat 1 is explained based on the above-described embodiments.
As shown in fig. 2 and 3, in the utility model, the position that just is located between disk seat 1 and the valve rod 13 on the inner wall of valve chamber is provided with the annular boss 17 that prevents disk seat 1 and remove to valve rod 13, and the one side that just is located disk seat 1 and keeps away from valve rod 13 on the inner wall of valve chamber is provided with first ring channel 18, installs three ring-opening 19 in first ring channel 18, and threaded connection has a plurality of second screws 20 on three ring-opening 19, the screw rod end pressure of second screw 20 is on disk seat 1.
The three open rings 19, with their own structural characteristics, are engaged in the first annular groove 18 and are pressed against the valve seat 1 by means of second screws 20 screwed thereto. When the valve seat 1 fails in sealing, the whole valve body does not need to be replaced, and only the failed valve seat 1 needs to be replaced in a targeted manner, so that the maintenance time and cost can be greatly saved. Specifically, the three-open ring is disassembled by utilizing the structure of the three-open ring, the three-open ring is taken out of the first annular groove 18, the damaged valve seat 1 is taken down, a new valve seat 1 is fixed in the valve cavity, the end face of the valve rod 13 of the new valve seat is in contact with the boss 17, the three-open ring 19 is installed, and the second screw 20 is screwed down.
Further, the details regarding the fit between the valve seat 1 and the boss 17 are as follows: an annular right-angle groove 21 is formed in one side, close to the boss 17, of the valve seat 1, and the boss 17 is clamped in the right-angle groove 21 and is in contact with the groove walls on two sides of the right-angle groove 21.
Further, a graphite gasket is arranged between a groove wall which is perpendicular to the axis of the valve seat on the right-angle groove 21 and the boss 17.
Pretightening force is applied through the second socket head cap screws, the valve seat 1 is pressed on the graphite gasket, sealing between the valve seat 1 and the valve body boss is achieved, and efficient sealing between the valve seat 1 and the boss is guaranteed.
Preferably, the second screw 20 is a socket head cap screw.
Example 4
The present embodiment is an embodiment of the fitting structure between the seal ring 2 and the valve seat 1 on the basis of the above-described embodiments.
As shown in fig. 2 and 3, in the present invention, the thickness dimension of the sealing ring 2 in the axial direction is smaller than the thickness dimension of the valve seat 1 in the axial direction.
Further, the slope kbProportional to the outer diameter of the valve seat 1. When the valve body is larger, the valve seat 1 corresponding to the valve body is larger, and the thickness of the corresponding sealing ring is larger; and the slope kbThe increase of the sealing ring can facilitate the rapid separation of the matching surfaces of the valve body and the sealing ring at the line segment CD; meanwhile, when the valve body is larger, the valve seat 1 corresponding to the valve body is larger, and meanwhile, the sealing force required by the valve body is larger; and the slope kbThe increase increases the mating surface of the valve body and the sealing ring at the line segment CD, and then a larger forced sealing force is obtained.
Example 5
This embodiment is to implement and explain the material selection of the present invention.
The utility model discloses a sealing washer 2 and disk seat 1 all preferably adopt pure metal construction.
When the utility model discloses an operating mode is when low temperature environment, and disk seat and sealing ring body adopt the good austenite stainless steel material of low temperature performance, and the method that the plasma spray welding sclerosis layer was all adopted on the surface of sealing ring and disk seat sets up the one deck protective layer to increase its wear-resisting corrosion resisting property, thereby can be applied to the abominable operating mode of all kinds of ultra-low temperature high pressure.
Compared with the prior art, the utility model discloses simple structure, the design of pure metal double clip angle sealing ring and double clip angle valve block has solved because metal and non-metallic material coefficient of contraction are different under the low temperature and has leaded to the problem of sealed inefficacy, has simple structure, characteristics stable performance under the ultra-low temperature operating mode.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can be covered within the protection scope of the present invention without the changes or substitutions conceived by the inventive work within the technical scope disclosed by the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (10)
1. The utility model provides a novel detachable pure metal butterfly valve double clip angle is sealed vice, is including installing disk seat (1) in the butterfly valve chamber and installing sealing ring (2) on butterfly plate (11), lateral wall (3) of sealing ring (2) and the pore wall seal fit of mounting hole (4) of disk seat (1), the cross section of mounting hole (4) is oval, its characterized in that: the mounting hole (4) is oval I (5) and oval II (6) respectively at disk seat (1) terminal surface that is close to butterfly valve rod (13) and the contour on the terminal surface of keeping away from valve rod (13) oval I (5) go up and two points that radially are perpendicular with the axis of valve rod (13) are A point (7) and C point (8) respectively, along the axial of disk seat (1), the point that corresponds with A point (7) and C point (8) on oval II (6) is B point (9) and D point (10) respectively, the line between A point (7) and B point (9) is line segment AB, the distance of line segment AB distance disk seat (1) axis increases gradually, the line between C point (8) and D point (10) is line segment CD, the distance of line segment CD distance disk seat (1) axis reduces gradually, and the slope k of straight line segment ABaSlope k of the straight line segment CDb；
The shape and the size of the cross section of the outer side wall (3) of the sealing ring (2) are consistent with those of the corresponding cross section on the mounting hole (4).
2. The novel detachable double-included-angle sealing pair of the pure metal butterfly valve according to claim 1, characterized in that: the one end of butterfly plate (11) of butterfly valve is provided with cylindrical step I (12) that are used for supporting sealing ring (2), sealing ring (2) cover is established on step I (12) one side of keeping away from butterfly valve rod (13) on step I (12) is provided with cylindrical step II (14) that the diameter is less than step I (12) the cover is equipped with butterfly plate clamping ring (15) that compresses tightly sealing ring (2) on butterfly plate (11) on step II (14), butterfly plate clamping ring (15) are fixed on step I (12) through a plurality of first screw (16).
3. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve is characterized in that: and a graphite gasket is arranged between the sealing ring (2) and the butterfly plate (11).
4. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve is characterized in that: the first screw (16) is a socket head cap screw.
5. The novel detachable double-included-angle sealing pair of the pure metal butterfly valve according to claim 1, characterized in that: the utility model discloses a valve seat, including valve seat (1), valve rod (13), ring-shaped boss (17) that prevent that valve seat (1) from removing to valve rod (13) are provided with at the position that just is located between valve seat (1) and valve rod (13) on the inner wall of valve chamber, and the one side that just is located valve seat (1) and keeps away from valve rod (13) on the inner wall of valve chamber is provided with first ring channel (18), installs three ring-opening (19) in first ring channel (18), and threaded connection has a plurality of second screws (20) on three ring-opening (19), the terminal pressure of screw rod of second screw (20) is on valve seat (1.
6. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve is characterized in that: one side of the valve seat (1) close to the boss (17) is provided with an annular right-angle groove (21), and the boss (17) is clamped into the right-angle groove (21) and is contacted with the groove walls on the two sides of the right-angle groove (21).
7. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve is characterized in that: and a graphite gasket is arranged between the groove wall which is vertical to the axis of the valve seat on the right-angle groove (21) and the boss (17).
8. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve is characterized in that: the second screw (20) is a socket head cap screw.
9. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve according to any one of claims 1 to 8, wherein: the thickness dimension of the sealing ring (2) in the axial direction is smaller than that of the valve seat (1) in the axial direction.
10. The novel double-included-angle sealing pair of the detachable pure metal butterfly valve according to any one of claims 1 to 8, wherein: the slope kbIs proportional to the outer diameter of the valve seat (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921161823.7U CN210318570U (en) | 2019-07-23 | 2019-07-23 | Novel detachable pure metal butterfly valve double-included-angle sealing pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921161823.7U CN210318570U (en) | 2019-07-23 | 2019-07-23 | Novel detachable pure metal butterfly valve double-included-angle sealing pair |
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| Publication Number | Publication Date |
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| CN210318570U true CN210318570U (en) | 2020-04-14 |
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| CN201921161823.7U Active CN210318570U (en) | 2019-07-23 | 2019-07-23 | Novel detachable pure metal butterfly valve double-included-angle sealing pair |
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| CN (1) | CN210318570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360992A (en) * | 2020-10-21 | 2021-02-12 | 大连康维科技有限公司 | Valve gate |
-
2019
- 2019-07-23 CN CN201921161823.7U patent/CN210318570U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360992A (en) * | 2020-10-21 | 2021-02-12 | 大连康维科技有限公司 | Valve gate |
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| CP03 | Change of name, title or address |
Address after: No. 3281, HANGGANG 4th Road, xihanggang, Shuangliu District, Chengdu, Sichuan 610200 Patentee after: Sichuan Suke Fluid Control Equipment Co.,Ltd. Address before: No. 3281, Konggang 4th Road, Xihanggang, Shuangliu District, Chengdu City, Sichuan Province, 610200 Patentee before: SICHUAN SUC FLOW CONTROL EQUIPMENT Co.,Ltd. |
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