CN217207793U - Double-stop sealing pneumatic combination valve - Google Patents
Double-stop sealing pneumatic combination valve Download PDFInfo
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- CN217207793U CN217207793U CN202220962127.1U CN202220962127U CN217207793U CN 217207793 U CN217207793 U CN 217207793U CN 202220962127 U CN202220962127 U CN 202220962127U CN 217207793 U CN217207793 U CN 217207793U
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- 238000007789 sealing Methods 0.000 title claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims description 25
- 238000013329 compounding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 13
- 239000002131 composite material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 238000007142 ring opening reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a double-stop sealed pneumatic combination valve, which relates to the technical field of pneumatic systems and comprises a valve body, a cylinder, a balance connecting plate, a first valve rod and a second valve rod, wherein the valve body is provided with a first valve seat and a second valve seat; the cylinder is connected with an air source; the balance connecting plate is connected with the air cylinder; the first valve rod is connected with the balance connecting plate, a first valve core is arranged at the bottom of the first valve rod, and the first valve core is used for being plugged with a first valve seat to realize sealing; the second valve rod is connected with the balance connecting plate, a second valve core is arranged at the bottom of the second valve rod and used for being plugged with a second valve seat to realize sealing, and the height of the second valve core is lower than that of the first valve core. The application provides a combination valve, first case and second case have certain difference in height to make both have certain time difference when opening or closing, thereby can protect first case all the time, prolong combination valve's life.
Description
Technical Field
The utility model relates to a pneumatic system technical field, more specifically say, relate to a two sealed pneumatic combination valves of section.
Background
The sealing compound valve comprises a hard sealing compound valve and a soft sealing compound valve, wherein the hard sealing compound valve is usually made of metal, such as copper, stainless steel, stellite alloy, nickel-based alloy and the like, has the advantages of high temperature resistance, wear resistance, better mechanical property and the like, and is widely applied to the fields of power generation, aviation, chemical industry, military and the like. The service life of the sealing compound valve in the prior art is short.
In summary, how to solve the problem of short service life of the sealing compound valve is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a double-stop sealing pneumatic combination valve, which can prolong the service life of the combination valve.
In order to achieve the above object, the present invention provides the following technical solutions:
a double block seal pneumatic compounding valve comprising:
the valve body is provided with a first valve seat and a second valve seat;
the cylinder is connected with an air source;
the balance connecting plate is connected with the air cylinder;
the first valve rod is connected with the balance connecting plate, a first valve core is arranged at the bottom of the first valve rod, and the first valve core is used for being plugged with the first valve seat to realize sealing;
the second valve rod is connected with the balance connecting plate, a second valve core is arranged at the bottom of the second valve rod and used for being plugged with the second valve seat to achieve sealing, and the height of the second valve core is lower than that of the first valve core.
Preferably, the valve body is provided with a middle plate, the middle plate is fixedly connected with a first fixing outer sleeve, the upper end of the first valve rod is connected with one end of a first sliding shaft, the other end of the first sliding shaft is connected with the balance connecting plate, the first sliding shaft is sleeved inside the first fixing outer sleeve, and the first sliding shaft and the first fixing outer sleeve are attached to each other.
Preferably, the top end of the first sliding shaft is connected with a first connecting shaft, the first connecting shaft is mounted on the balance connecting plate, and the first connecting shaft and the balance connecting plate are in clearance fit.
Preferably, the top of the second valve rod is connected with a flat spring shaft, the top of the flat spring shaft is connected with the balance connecting plate, and a flat spring is arranged at the joint of the flat spring shaft and the second valve rod.
Preferably, the upper end of the flat spring shaft is connected with one end of a second sliding shaft, the other end of the second sliding shaft is connected with the balance connecting plate, the middle plate is fixedly connected with a second fixing outer sleeve, and the second sliding shaft is sleeved inside the second fixing outer sleeve and is attached to the second fixing outer sleeve.
Preferably, a seal ring for increasing friction force is provided inside the second stationary outer sleeve, and the second sliding shaft slides relative to the seal ring.
Preferably, the top end of the second sliding shaft is connected with a second connecting shaft, the second connecting shaft is mounted on the balance connecting plate, and the second connecting shaft and the balance connecting plate are in clearance fit.
Preferably, the periphery at second valve rod top is equipped with flat spring nut, second recess and half ring-opening, just flat spring nut cover is located the bottom of flat spring axle is outside, and both sliding connection, flat spring nut with second valve rod threaded connection, half ring-opening is located inside the second recess, just half ring-opening with the second recess is in the joint in the axial of second valve rod, half ring-opening is located flat spring nut's inside.
Preferably, at least two of the cylinders are arranged in series, and the balance connecting plate is connected with one of the cylinders.
The utility model provides a two stop sealed pneumatic combination valves, including valve body, cylinder, balanced connecting plate, first valve rod and second valve rod.
When needs combination valve closes, the air supply admits air in cylinder piston's upper end, thereby drive balanced connecting plate downstream, because first valve rod and second valve rod are all installed on balanced connecting plate, consequently balanced connecting plate drives first valve rod and the same downstream of second valve rod, because the height that highly is less than first case of second case, consequently when first valve rod and the same downstream of second valve rod, the second case is preferred to be pegged graft with the second valve seat, second case and the preferential realization of second valve seat are sealed promptly, first case and first valve seat lag realize sealed.
When the compound valve is required to be opened, the air source enters air at the lower end of the cylinder piston, so that the balance connecting plate is driven to move upwards, the balance connecting plate drives the first valve rod and the second valve rod to move upwards, and because the height difference exists between the first valve core and the second valve core, the first valve core is preferentially separated from the first valve seat, the second valve core is lagged to be separated from the second valve seat, namely the first valve core is preferentially opened, and the second valve core is lagged to be opened.
Because the first valve core and the second valve core have a height difference and the material passing through the compound valve is high-temperature and high-pressure material, the second valve core is preferentially contacted with the high-temperature and high-pressure material when the compound valve is closed, the material is in a flowing state before the compound valve is closed, the second valve core needs to bear the impact force given by the material, and when the second valve core is sealed with the second valve seat, the flowing speed of the material is reduced, so the impact force borne by the first valve core when the first valve core is sealed with the first valve seat is smaller; when the composite valve is opened, the first valve core and the first valve seat are opened preferentially, the flow speed of the opened substance is increased, the second valve core is opened after delay, and the second valve core bears large impact force.
The application provides a combination valve, first case and second case have the time difference when closing or opening to make the impact force that first case received less all the time, first case receives the protection all the time promptly, consequently even the second case damages, combination valve also can realize closing and opening through first case, thereby the life of extension combination valve, first case and second case make the combination valve obtain the second grade simultaneously and seal, thereby improve combination valve's leakproofness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of the double-stop sealing pneumatic combination valve provided by the present invention.
In fig. 1:
the valve comprises a valve body 1, a first valve seat 2, a first valve core 3, a first valve rod 4, an anti-rotation block 5, a middle plate 6, a first fixing outer sleeve 7, a first sliding shaft 8, a first connecting shaft 9, a balance connecting plate 10, a cylinder shaft 11, a hand wheel 12, a manual part 13, an air pipe 14, an elbow 15, a first cylinder 16, a second cylinder 17, a second connecting shaft 18, a strut rod 19, a second sliding shaft 20, a sealing ring 21, a second fixing outer sleeve 22, a flat spring shaft 23, a flat spring 24, a flat spring nut 25, a semi-open ring 26, a second valve rod 27, a second valve core 28 and a second valve seat 29.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a two stop sealed pneumatic combination valves, can prolong the life of combination valve.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a double-stop sealing pneumatic combination valve.
The application provides a double-stop sealing pneumatic combination valve, which comprises a valve body 1, a cylinder, a balance connecting plate 10, a first valve core 4 and a second valve rod 27, wherein the valve body 1 is provided with a first valve seat 2 and a second valve seat 29; the cylinder is connected with an air source; the balance connecting plate 10 is connected with the air cylinder; the first valve core 4 is connected with the balance connecting plate 10, the bottom of the first valve core 4 is provided with a first valve core 3, and the first valve core 3 is used for being plugged with the first valve seat 2 to realize sealing; the second valve rod 27 is connected with the balance connecting plate 10, a second valve core 28 is arranged at the bottom of the second valve rod 27, the second valve core 28 is used for being plugged with a second valve seat 29 to achieve sealing, and the height of the second valve core 28 is lower than that of the first valve core 3.
Specifically, a pillar rod 19 is respectively arranged on two sides of the upper end of the valve body 1, the first valve core 4 and the second valve rod 27 are connected with the pillar rod 19 in a sliding mode, the top ends of the first valve core 4 and the second valve rod 27 are connected with a balance connecting plate 10, the balance connecting plate 10 is a rectangular balance connecting plate 10, the upper end of the balance connecting plate 10 is fixedly connected with a cylinder shaft 11, the cylinder shaft 11 is connected with a piston of a cylinder, a hand wheel 12 and a manual part 13 are arranged above the cylinder, and first filler and second filler are respectively arranged in the first valve seat 2 and the second valve seat 29.
When the compound valve is required to be closed, an air source is fed at the upper end of the cylinder piston, the cylinder piston drives the balance connecting plate 10 to move downwards through the cylinder shaft 11, and the first valve core 4 and the second valve rod 27 are both arranged on the balance connecting plate 10, so that the balance connecting plate 10 drives the first valve core 4 and the second valve rod 27 to move downwards together, and the height of the second valve core 28 is lower than that of the first valve core 3, so when the first valve core 4 and the second valve rod 27 move downwards together, the second valve core 28 is preferably inserted into the second valve seat 29, that is, the second valve core 28 and the second valve seat 29 are preferably sealed, and the first valve core 3 and the first valve seat 2 are lagged to realize sealing.
When the compound valve is required to be opened, an air source enters at the lower end of a piston of the air cylinder, the balance connecting plate 10 is driven to move upwards through the air cylinder shaft 11, the balance connecting plate 10 drives the first valve core 4 and the second valve rod 27 to move upwards, and the first valve core 3 is preferentially separated from the first valve seat 2, the second valve core 28 is lagged to be separated from the second valve seat 29 due to the height difference between the first valve core 3 and the second valve core 28, namely the first valve core 3 is preferentially opened, and the second valve core 28 is lagged to be opened.
Because the first valve core 3 and the second valve core 28 have a height difference and the material passing through the compound valve is high-temperature and high-pressure material, the second valve core 28 is preferentially contacted with the high-temperature and high-pressure material when the compound valve is closed, the material is in a flowing state before the compound valve is closed, so the second valve core 28 needs to bear the impact force given by the material, when the second valve core 28 is sealed with the second valve seat 29, the flowing speed of the material is reduced, and the impact force borne when the first valve core 3 is sealed with the first valve seat 2 is smaller; when the composite valve is opened, the first valve core 3 and the first valve seat 2 are opened preferentially, the flow speed of the opened substance is increased, the second valve core 28 is opened after delay, and the second valve core 28 bears large impact force.
The application provides a compound valve, there is the time difference first case 3 and second case 28 when closing or opening, thereby make the impact force that first case 3 received less all the time, first case 3 receives the protection all the time promptly, consequently even second case 28 damages, compound valve also can realize closing and opening through first case 3, thereby the life of extension compound valve, first case 3 and second case 28 make compound valve obtain the second grade sealed simultaneously, thereby improve compound valve's leakproofness.
Alternatively, the balance connecting plate 10 may have other shapes.
On the basis of the above embodiment, the valve body 1 is provided with the middle plate 6, the middle plate 6 is fixedly connected with a first fixed outer sleeve 7, the upper end of the first valve core 4 is connected with one end of a first sliding shaft 8, the other end of the first sliding shaft 8 is connected with a balance connecting plate 10, the first sliding shaft 8 is sleeved inside the first fixed outer sleeve 7, and the two are attached to each other.
Specifically, the both ends of medium plate 6 are fixed mounting respectively on two prop rods 19, fixed being equipped with first fixed overcoat 7 on the medium plate 6, its cover is located the first slide axle 8 periphery of being connected with first case 4, the through-hole has been seted up to first slide axle 8 inside, the top of first case 4 is the step axle, the path end of step axle is inserted and is located in the through-hole of first slide axle 8, and both pass through pin connection, the bottom surface of first slide axle 8 and the step face butt of first case 4 step axle, the top and the balanced connecting plate 10 of first slide axle 8 are connected, and the periphery of first slide axle 8 and the internal face laminating of first fixed overcoat 7.
Through the laminating setting of first sliding shaft 8 and first fixed overcoat 7, when the composite valve is opened or closed, first sliding shaft 8 when sliding for first fixed overcoat 7, can guarantee that first sliding shaft 8 slides on vertical direction to avoid first sliding shaft 8 to incline at the in-process that removes and lead to balanced connecting plate 10 excessively to incline and block, thereby lead to the unable opening of composite valve or close.
In addition, in the closing process of the combination valve, the pressure applied to the first sliding shaft 8 by the balance connecting plate 10 is large, so that the bottom surface of the first sliding shaft 8 is abutted against the step surface of the first valve core 4, the first valve core 4 can be stably moved, and the damage of the pin caused by the transmission force of the pin between the first valve core 4 and the first sliding shaft 8 is avoided.
Alternatively, the first sliding shaft 8 and the first spool 4 may be connected in other ways.
On the basis of the above embodiment, the top end of the first sliding shaft 8 is connected with the first connecting shaft 9, the first connecting shaft 9 is installed on the balance connecting plate 10, and the two are in clearance fit.
Specifically, the top of the first sliding shaft 8 is connected with the first connecting shaft 9 through a pin, the first connecting shaft 9 is a T-shaped connecting shaft, the balance connecting plate 10 is provided with a T-shaped through hole, the first connecting shaft 9 is connected with the T-shaped through hole in an inserting mode, and the first connecting shaft and the T-shaped through hole are in clearance fit.
Because the first valve core 4 and the second valve rod 27 have a certain time difference when being opened or closed, the force given by the first valve core 4 and the second valve rod 27 on the balance connecting plate 10 is uneven, so the balance connecting plate 10 can have small-amplitude inclination when being opened or closed, and the first connecting shaft 9 and the balance connecting plate 10 are in clearance fit, so that the first connecting shaft 9 has a certain degree of freedom, and the balance connecting plate 10 cannot move continuously due to the fact that the first connecting shaft 9 and the balance connecting plate 10 are clamped.
Alternatively, the first connecting shaft 9 may have other shapes.
On the basis of the above embodiment, the flat spring shaft 23 is connected to the top of the second valve rod 27, the top of the flat spring shaft 23 is connected to the balance connecting plate 10, and the flat spring 24 is arranged at the connection position of the flat spring shaft 23 and the second valve rod 27.
Specifically, the top of the second valve rod 27 is provided with a flat spring shaft 23, the bottom end of the flat spring shaft 23 is provided with a groove, a flat spring 24 is installed in the groove, and the flat spring 24 is in contact with the top surface of the second valve rod 27.
When the combination valve is closed, the balance connecting plate 10 drives the flat spring shaft 23 to move downwards, the flat spring shaft 23 gives pressure to the second valve rod 27 through the flat spring 24 at the bottom so as to enable the second valve rod 27 to move downwards, and the flat spring 24 cannot be compressed or the compression amount is small before the second valve core 28 contacts with the second valve seat 29 due to the fact that the force required for compressing and deforming the flat spring 24 is large; when the second valve core 28 is in contact with the second valve seat 29, because the second valve seat 29 is provided with the packing which gives a certain resistance to the second valve core 28, when the flat spring shaft 23 continues to move downwards, the flat spring 24 can be compressed, under the resistance of the packing, the flat spring 24 is gradually compressed, and the second valve rod 27 continues to move downwards until the second valve core 28 is completely sealed with the second valve seat 29, because the second valve core 28 is preferentially contacted and sealed with the second valve seat 29, the first valve core 3 is contacted and sealed with the first valve seat 2 in a lagging way during the compression of the flat spring 24, and under the action of the flat spring 24, the sealing speed of the second valve core 28 and the second valve seat 29 is slower than that of the first valve core 3 and the first valve seat 2, so when the second valve core 28 is completely sealed with the second valve seat 29, the first valve core 3 and the first valve seat 2 are also completely sealed.
Because the flat spring 24 is in a compressed state in the closed state of the combination valve, when the combination valve is opened, the cylinder shaft 11 drives the balance connecting plate 10 to move upwards, the balance connecting plate 10 drives the first valve core 4 to move upwards through the first connecting shaft 9 and the first sliding shaft 8, and the balance connecting plate 10 drives the flat spring shaft 23 to move upwards, because the flat spring 24 is in a compressed state, when the flat spring shaft 23 moves upwards to reset the flat spring 24, the flat spring shaft 23 can drive the second valve rod 27 to move upwards, and in the process of resetting the flat spring 24, the first valve core 3 and the first valve seat 2 are preferentially separated and opened, and after the flat spring 24 resets, the second valve core 28 and the second valve seat 29 are delayed and separated and opened.
Through the arrangement of the flat spring 24, the first valve core 3 and the first valve seat 2, and the second valve core 28 and the second valve seat 29 can be completely sealed when the compound valve is closed, and the time difference between the opening of the first valve core 3 and the opening of the second valve core 28 can be increased when the compound valve is opened, so that the first valve core 3 is further protected, and the sealing performance of the compound valve can be improved.
On the basis of the above embodiment, the upper end of the flat spring shaft 23 is connected to one end of the second sliding shaft 20, the other end of the second sliding shaft 20 is connected to the balance connection plate 10, the middle plate 6 is fixedly connected to the second fixing outer sleeve 22, and the second sliding shaft 20 is sleeved inside the second fixing outer sleeve 22 and is attached to the second fixing outer sleeve 22.
Specifically, a through hole is formed in the second sliding shaft 20, a step shaft is arranged at the upper end of the flat spring shaft 23, the small diameter end of the step shaft is connected with the through hole in an inserting mode and is connected with the through hole through a pin, the bottom surface of the second sliding shaft 20 is abutted to the step surface of the flat spring shaft 23, the second fixing outer sleeve 22 is arranged on the periphery of the second sliding shaft 20, and the second fixing outer sleeve and the second sliding shaft are attached to each other.
Through the arrangement of the second sliding shaft 20 and the second fixed outer sleeve 22 in an attaching manner, when the composite valve is opened or closed, and the second sliding shaft 20 slides relative to the second fixed outer sleeve 22, the second sliding shaft 20 can be ensured to slide in the vertical direction, so that the phenomenon that the balance connecting plate 10 is excessively inclined and clamped due to the inclination of the second sliding shaft 20 in the moving process, and the composite valve cannot be opened or closed is avoided.
In addition, because the pressure of the balance connecting plate 10 is large in the closing process of the combination valve, the bottom surface of the second sliding shaft 20 is abutted against the step surface of the flat spring shaft 23, so that the flat spring shaft 23 can stably move, and the pin damage caused by the transmission force of the flat spring shaft 23 and the first sliding shaft 8 through the pin is avoided.
Alternatively, the flat spring shaft 23 can be connected to the second sliding shaft 20 in another way.
In addition to the above embodiment, the second fixing outer jacket 22 is provided with the seal ring 21 for increasing the frictional force therein, and the second sliding shaft 20 slides relative to the seal ring 21.
Specifically, two rectangular grooves are formed in the second fixing outer sleeve 22, rubber seal rings are arranged in the two rectangular grooves, and because the flat spring 24 is arranged between the second valve rod 27 and the flat spring shaft 23, and in a closed state of the composite valve, the flat spring 24 is in a compressed state, when the composite valve is opened, one side, close to the flat spring 24, of the balance connecting plate 10 needs to additionally bear the acting force of the flat spring 24, when the composite valve is opened, the height, close to the second valve rod 27, of the balance connecting plate 10 is higher than that, close to the first valve element 4, of the balance connecting plate 10, and a certain inclination angle is formed between the balance connecting plate 10 and the flat spring shaft.
The sliding resistance of the second sliding shaft 20 during sliding can be increased through the arrangement of the rubber sealing ring, so that the acting force of the flat spring 24 is offset through the resistance, the inclination angle of the balance connecting plate 10 is reduced, and the phenomenon that the balance connecting plate 10 is excessively inclined to block and cannot move is avoided.
Alternatively, the seal ring 21 may be a seal ring 21 made of other materials.
Alternatively, one or more sealing rings 21 may be provided in the second stationary outer jacket 22, depending on the resistance offered by the sealing rings 21.
On the basis of the above embodiment, the top end of the second sliding shaft 20 is connected to the second connecting shaft 18, and the second connecting shaft 18 is mounted on the balance connecting plate 10 with a clearance fit.
Specifically, the top end of the second sliding shaft 20 is connected with the second connecting shaft 18 through a pin, the second connecting shaft 18 is a T-shaped connecting shaft, the balance connecting plate 10 is provided with a T-shaped through hole, the second connecting shaft 18 is inserted into the T-shaped through hole, and the two are in clearance fit.
Because the first valve core 4 and the second valve rod 27 have a certain time difference when being opened or closed, the force given by the first valve core 4 and the second valve rod 27 on the balance connecting plate 10 is uneven, so the balance connecting plate 10 can have small-amplitude inclination when being opened or closed, and the second connecting shaft 18 can have a certain degree of freedom by the clearance fit of the second connecting shaft 18 and the balance connecting plate 10, so that the balance connecting plate 10 cannot move continuously due to the fact that the second connecting shaft 18 and the balance connecting plate 10 are clamped.
Alternatively, the second connecting shaft 18 may have other shapes.
On the basis of the above-mentioned embodiment, the periphery at the top of second valve rod 27 is equipped with flat spring nut 25, second recess and half-open ring 26, and flat spring nut 25 overlaps the bottom outside of locating flat spring shaft 23, and both sliding connection, and flat spring nut 25 and second valve rod 27 threaded connection, and half-open ring 26 locates inside the second recess, and half-open ring 26 and second recess are at the epaxial joint of second valve rod 27, and half-open ring 26 is located flat spring nut 25's inside.
Specifically, the top periphery of second valve stem 27 is equipped with the second recess, be equipped with half-open ring 26 in the second recess, and the external diameter of half-open ring 26 is greater than the diameter of second valve stem 27, half-open ring 26's part protrusion is in the outside of second recess promptly, the top periphery of second valve stem 27 is located to flat spring nut 25, and flat spring nut 25's one end and half-open ring 26 joint on the axial, flat spring nut 25 and second valve stem 27 threaded connection, flat spring shaft 23's periphery is equipped with the third recess along the axial, flat spring nut 25's the other end slidable is located in the third recess, flat spring nut 25's tip can with the inner wall of third recess joint on the axial.
When the compound valve is closed, the balance connecting plate 10 drives the flat spring shaft 23 to move downwards through the second sliding shaft 20, and drives the second valve rod 27 to move downwards through the flat spring 24 until the second valve core 28 and the second valve seat 29 are completely sealed; when the composite valve is opened, the balance connecting plate 10 drives the flat spring shaft 23 to move upwards through the second sliding shaft 20, when the flat spring 24 is reset, the flat spring nut 25 slides downwards in the third groove, after the flat spring 24 is reset, the flat spring nut 25 is clamped with the inner wall surface below the third groove, at the moment, the flat spring shaft 23 continues to move upwards, the flat spring nut 25 can be driven to move upwards through the third groove, and the semi-open ring 26 is located inside the flat spring nut 25 and clamped in the axial direction, so that when the flat spring nut 25 moves upwards, the lower end of the flat spring nut upwards drives the semi-open ring 26 to move upwards, and the second valve rod 27 is driven to move upwards until the composite valve is opened.
Through the arrangement of the flat spring nut 25, the second groove and the semi-open ring 26, the second valve rod 27 can be driven by the flat spring shaft 23 to move up and down, so that the second valve core 28 and the second valve seat 29 can be opened or closed.
Alternatively, a peripheral projection may be provided directly on the top of the second valve stem 27.
On the basis of any one of the above schemes, at least two cylinders are arranged in series, and the balance connecting plate 10 is connected with one of the cylinders.
Specifically, because the balance connecting plate 10 needs to drive the first valve core 4 and the second valve rod 27 to move, at least two cylinders are required to be connected in series to provide enough acting force to drive the two valve rods to move, and the first cylinder 16 and the second cylinder 17 are formed by connecting the air pipe 14 and the elbow 15 in series.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above is to the utility model provides a two stop seal pneumatic combination valves have been introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. A double block seal pneumatic compounding valve, comprising:
a valve body (1) provided with a first valve seat (2) and a second valve seat (29);
the cylinder is connected with an air source;
a balance connecting plate (10) connected with the cylinder;
the first valve rod (4) is connected with the balance connecting plate (10), a first valve core (3) is arranged at the bottom of the first valve rod (4), and the first valve core (3) is used for being plugged with the first valve seat (2) to realize sealing;
the second valve rod (27) is connected with the balance connecting plate (10), a second valve core (28) is arranged at the bottom of the second valve rod (27), the second valve core (28) is used for being plugged with the second valve seat (29) to achieve sealing, and the height of the second valve core (28) is lower than that of the first valve core (3).
2. The double-stop sealed pneumatic combination valve according to claim 1, wherein the valve body (1) is provided with a middle plate (6), the middle plate (6) is fixedly connected with a first fixed outer sleeve (7), the upper end of the first valve rod (4) is connected with one end of a first sliding shaft (8), the other end of the first sliding shaft (8) is connected with the balance connecting plate (10), and the first sliding shaft (8) is sleeved inside the first fixed outer sleeve (7) and is attached to the first fixed outer sleeve.
3. Double block seal pneumatic combination valve according to claim 2, characterized in that the top end of the first sliding shaft (8) is connected with a first connecting shaft (9), the first connecting shaft (9) being mounted to the balancing connecting plate (10) with a clearance fit.
4. A double block seal pneumatic combination valve according to claim 3, characterized in that a flat spring shaft (23) is connected to the top of the second valve rod (27), the top of the flat spring shaft (23) is connected to the balance connecting plate (10), and a flat spring (24) is arranged at the connection of the flat spring shaft (23) and the second valve rod (27).
5. The double-stop sealed pneumatic combination valve according to claim 4, wherein the upper end of the flat spring shaft (23) is connected with one end of a second sliding shaft (20), the other end of the second sliding shaft (20) is connected with the balance connecting plate (10), the middle plate (6) is fixedly connected with a second fixed outer sleeve (22), and the second sliding shaft (20) is sleeved inside the second fixed outer sleeve (22) and is attached to the second fixed outer sleeve.
6. Double block seal pneumatic combination valve according to claim 5, characterized in that the second fixed outer sleeve (22) is internally provided with a sealing ring (21) for increasing the friction force, and the second sliding shaft (20) slides with respect to the sealing ring (21).
7. Double block seal pneumatic combination valve according to claim 6, characterized in that the top end of the second sliding shaft (20) is connected with a second connecting shaft (18), the second connecting shaft (18) being mounted to the balancing connection plate (10) with a clearance fit.
8. The double-stop sealed pneumatic combination valve according to claim 7, wherein a flat spring nut (25), a second groove and a semi-open ring (26) are arranged on the periphery of the top of the second valve rod (27), the flat spring nut (25) is sleeved outside the bottom end of the flat spring shaft (23) and is slidably connected with the flat spring nut and the flat spring nut, the flat spring nut (25) is in threaded connection with the second valve rod (27), the semi-open ring (26) is arranged inside the second groove, the semi-open ring (26) is in clamping connection with the second groove in the axial direction of the second valve rod (27), and the semi-open ring (26) is arranged inside the flat spring nut (25).
9. Double block sealed pneumatic compound valve according to any of the claims 1 to 8, characterised in that at least two of said cylinders are arranged in series, said balancing connection plate (10) being connected to one of said cylinders.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220962127.1U CN217207793U (en) | 2022-04-24 | 2022-04-24 | Double-stop sealing pneumatic combination valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220962127.1U CN217207793U (en) | 2022-04-24 | 2022-04-24 | Double-stop sealing pneumatic combination valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419729A (en) * | 2022-09-15 | 2022-12-02 | 上海大通仪表有限公司 | Linkage type fine regulating valve |
| CN115435118A (en) * | 2022-08-18 | 2022-12-06 | 上海大通仪表有限公司 | Linkage type adjusting valve and adjusting method thereof |
-
2022
- 2022-04-24 CN CN202220962127.1U patent/CN217207793U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115435118A (en) * | 2022-08-18 | 2022-12-06 | 上海大通仪表有限公司 | Linkage type adjusting valve and adjusting method thereof |
| CN115419729A (en) * | 2022-09-15 | 2022-12-02 | 上海大通仪表有限公司 | Linkage type fine regulating valve |
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