CN212509542U - Normally closed emptying valve - Google Patents
Normally closed emptying valve Download PDFInfo
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- CN212509542U CN212509542U CN202021221138.1U CN202021221138U CN212509542U CN 212509542 U CN212509542 U CN 212509542U CN 202021221138 U CN202021221138 U CN 202021221138U CN 212509542 U CN212509542 U CN 212509542U
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Abstract
The utility model provides a normally closed blow-down valve, which comprises a valve casing, a valve seat, a guide valve cover, a piston valve clack and a valve rod, wherein the valve casing is provided with an air outlet; the valve seat is provided with an air inlet channel, the valve seat is connected with the valve shell, and the air inlet channel can be communicated with the air outlet to form an exhaust channel; one end of the guide valve cover is connected with the valve shell, and the guide valve cover is provided with a socket slot; the socket slot is positioned in the cavity and communicated with the cavity; the piston valve clack is arranged in the cavity, one end of the piston valve clack is abutted against the end face of the valve seat to plug the air outlet of the air inlet channel, the other end of the piston valve clack is inserted into the socket groove, the piston valve clack is tightly matched with the inner wall of the socket groove, the piston valve clack can move along the axial direction of the socket groove, the piston valve clack is provided with a second through hole penetrating through the axial direction of the piston valve clack, and the second through hole is communicated with the air outlet of; the valve rod is connected with the piston valve clack, the valve rod is connected with the adjusting disc, and the valve rod and the piston valve clack are driven by the adjusting disc to move along the axial direction so as to open the piston valve clack; the utility model discloses sealing performance is good, and is safer.
Description
Technical Field
The utility model relates to a novel atmospheric valve specifically relates to a normally closed atmospheric valve.
Background
The emptying valve is widely applied in the technical field of modern manufacturing engineering, and the emptying valve is used for discharging pressurized fluid through the emptying valve in a non-working state or an emergency state so as to avoid other accidents.
Because the air release valve technology is more and more applied to various industries, the performance of the original traditional air release valve is continuously improved, and the development of new air release valve products which meet the market requirements is not easy. One problem often encountered with the blow-down valves currently in use is that: traditional atmospheric valve generally is when the air compressor machine uninstallation is shut down automatic pressure release unloading of machine, when not obtaining release signal, also can appear the simple construction of automatic unloading according to self pressure, adopts the automatic unloading to empty and can bring the potential safety hazard, can't satisfy diversified market demand.
SUMMERY OF THE UTILITY MODEL
To the defects in the prior art, the utility model aims at providing a normally closed atmospheric valve.
According to the utility model provides a normally closed atmospheric valve, include:
the valve shell is a cavity with two open ends, and the cavity is provided with an air outlet;
the valve seat is inserted into one open end of the cavity, an air inlet channel is arranged on the valve seat, and the air inlet channel can be communicated with the air outlet to form an exhaust channel;
one end of the guide valve cover is connected with the other open end of the cavity, and one end of the guide valve cover is inserted into the cavity from the other open end of the cavity; the guide valve cover is provided with a socket slot; the socket slot is positioned in the cavity and communicated with the cavity, and a first through hole is formed in the bottom of the socket slot;
the piston valve clack is arranged in the cavity, one end of the piston valve clack props against the end face of the valve seat to form a sealing face, so that an air outlet of the air inlet channel is blocked, the other end of the piston valve clack is inserted into the socket slot, the piston valve clack is tightly matched with the inner wall of the socket slot, the piston valve clack can move along the axial direction of the socket slot, the piston valve clack is provided with a second through hole which penetrates through the axial direction of the piston valve clack, the second through hole is communicated with the air outlet of the air inlet channel, and part of air to be released enters the other end of the piston valve clack from the second through hole, so that the air pressure of the end face of the;
one end of the valve rod penetrates into the socket slot from the first through hole and is connected with the other end of the piston valve clack, the other end of the valve rod is connected with an adjusting disc, and the valve rod and the piston valve clack are driven to move axially through the adjusting disc; an air outlet channel is arranged at one end, close to the piston valve clack, of the valve rod, an air inlet of the air outlet channel is communicated with the second through hole, and an outlet of the air outlet channel is communicated with the socket groove;
the valve clack cover is sleeved at one end, close to the piston valve clack, of the valve rod and connected with the piston valve clack, and is used for fixing the valve rod and the piston valve clack; an outer tongue locking washer is arranged between the valve clack cover and the piston valve clack and is bent at two sides to tightly clamp the valve clack cover.
Preferably, the normally closed blow valve comprises:
the spring seat is sleeved on the outer wall of one end, close to the piston valve clack, of the valve rod, and one end of the spring seat is connected with the valve clack cover;
the first spring is sleeved on the outer wall of one end, close to the piston valve clack, of the valve rod, the first spring is located in the bearing slot, one end of the first spring is in contact with the bottom surface of the bearing slot, and the other end of the first spring is sleeved on the periphery of the spring seat.
Preferably, a spring clamping piece and a retaining ring are arranged between the first spring and the bottom surface of the bearing slot, and the spring clamping piece is located between the end part of the first spring and the retaining ring.
Preferably, the normally closed blow valve comprises:
the second spring is sleeved on the outer wall of one end, close to the adjusting disc, of the valve rod, and the second spring is located between the guide valve cover and the adjusting disc.
Preferably, the piston valve clack is provided with a guide ring, and the guide ring is arranged at one end close to the socket groove.
Preferably, the piston valve clack is provided with a Glan ring, so that the piston valve clack is tightly matched with the inner wall of the socket groove.
Preferably, the first through hole is provided with a star-shaped sealing ring and a shaft stett ring at intervals along the axial direction, so that the valve rod is tightly matched with the inner wall of the first through hole.
Preferably, the valve seat is threadedly connected to the valve housing.
Preferably, the connection part of the valve seat and the valve casing is provided with silica gel.
Preferably, the guide valve cover is connected with the valve shell through threads; the guide valve cover with the connection position of valve casing sets up silica gel.
Compared with the prior art, the utility model discloses at least one kind's beneficial effect as follows has:
in the structure of the utility model, the valve clack adopts the piston structure design, and the piston valve clack is movably connected with the valve rod, so that the connection mode is favorable for centering, matching and sealing of the valve clack and the valve seat, and sealing leakage caused by unevenness of the sealing surface of the valve clack and the valve seat due to the deflection of the valve rod can be avoided; after the valve clack cover is locked, the valve clack cover is tightly clamped by arranging an outer tongue stop washer, so that the connection between the piston valve clack and the valve rod is not easy to loosen and fall off; an adjusting disc is arranged at one end of the valve rod, and the adjusting disc is moved by external force (a sensor or a pressure signal detects that opening force is needed), so that the valve rod and the piston valve clack are driven to move, and the piston valve clack is opened to achieve the purpose of opening the emptying valve.
The above structure of the utility model, through set up the glan circle between piston valve clack and direction valve gap to and be equipped with twice seal structure between valve rod and direction valve gap, can prevent working medium's leakage and the invasion of external dust and foreign matter through multichannel seal structure, overall structure's leakproofness is good.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an assembly view of a normally closed dump valve in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a normally closed dump valve according to a preferred embodiment of the present invention;
FIG. 3 is a side schematic view of a normally closed dump valve according to a preferred embodiment of the present invention;
FIG. 4 is a schematic view of the connection of the flap cover to the outer tongue stop washer of a normally closed vent valve in accordance with a preferred embodiment of the present invention;
the scores in the figure are indicated as: the valve comprises a valve seat 1, a valve shell 2, a piston valve clack 3, a guide ring 4, a Glan ring 5, an outer tongue stop washer 6, a valve clack cover 7, a spring seat 8, a first spring 9, a guide valve cover 10, a spring clamping piece 11, a check ring 12, a St ring 13, a star-shaped sealing ring 14, a valve rod 15, a second spring 16, a hexagon nut 17, an adjusting disc 18, an air inlet channel 101, a second through hole 102, an air outlet channel 103 and an air outlet 201.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Referring to fig. 1, which is an assembly diagram of a normally closed emptying valve according to a preferred embodiment of the present invention, the assembly diagram includes a valve housing 2, a valve seat 1, a guide valve cover 10, a piston valve flap 3 and a valve rod 15, wherein the valve seat 1 is fixed to one end of the valve housing 2, and the other end of the valve housing 2 is fixed to the guide valve cover 10; the piston valve clack 3 is arranged in the valve casing 2, and the piston valve clack 3 props against the valve seat 1 and forms a sealing surface; the valve rod 15 is inserted from the guide valve cover 10 into the valve housing 2 and is movably connected to the piston flap 3.
Referring to fig. 2, the valve housing 2 is a cavity with two open ends, and the cavity is provided with an air outlet 201. The air outlet 201 is perpendicular to the upper part of the cavity and is close to one end of the valve housing 2.
Referring to fig. 1, the valve seat 1 is a hollow cylinder, and the hollow cylinder is inserted into and fixed to an open end of the cavity. The hollow cavity of the hollow cylinder forms the air inlet passage 101 of the valve seat 1. When the piston valve clack 3 is separated from the valve seat 1, the air inlet channel 101 of the valve seat 1 can be communicated with the air outlet 201 to form an exhaust channel.
Referring to fig. 1 and 3, one end of the pilot valve cover 10 is connected to the other open end of the cavity, and one end of the pilot valve cover 10 is inserted into the cavity from the other open end of the cavity. The guide valve cover 10 is provided with a socket groove, and the socket groove has a certain accommodating space, can accommodate the piston valve rod 15 and can provide an axial moving space for the piston valve rod 15. The socket is positioned in the cavity and communicated with the cavity, an insertion hole of the socket faces to one side of the piston valve clack 3, and a first through hole is formed in the bottom of the socket and used for penetrating through the valve rod 15.
Referring to fig. 1, the two ends of the piston valve flap 3 are different-shaped members, one end of which is formed into a plate-shaped member, and the other end of which is a columnar member, the diameter of the plate-shaped member is slightly larger than that of the columnar member, and the diameter of the plate-shaped member matches with the outer diameter of the outlet of the intake passage 101. The plate-like member is connected to the columnar member by a connecting section having a diameter smaller than that of the columnar member. The piston valve clack 3 is arranged in the cavity. One end (plate-shaped part) of the piston valve flap 3 abuts against the end face of the valve seat 1, so that the air outlet 201 of the air inlet channel 101 is blocked, and one end face of the piston valve flap 3 and the valve seat 1 form a sealing surface. The other end (the columnar part) of the piston valve clack 3 is inserted into the socket groove, the piston valve clack 3 is tightly matched with the inner wall of the socket groove, and the piston valve clack 3 can move along the axial direction of the socket groove. The piston valve clack 3 is provided with a second through hole 102 which is axially communicated, the second through hole 102 is communicated with an air outlet 201 of the air inlet channel 101, so that air entering from the air inlet channel 101 of the valve seat 1 is divided into one path and enters the other end of the piston valve clack from the second through hole, and the air pressure of the end surface of the piston valve clack is larger than that of the sealing surface.
Preferably, a recess is provided at the end of the cylindrical part remote from the connecting section, which recess is used for connecting the valve rod 15. The internal diameter of the recess is sized to match the external diameter of the valve stem 15 so that one end of the valve stem 15 can be inserted into the recess.
One end of the valve rod 15 penetrates into the socket from the first through hole and is connected with a groove of a columnar component of the piston valve clack 3, the other end of the valve rod 15 is connected with the adjusting disc 18 through the hexagon nut 17, the valve rod 15 and the piston valve clack 3 are driven to move axially through the adjusting disc 18, the piston valve clack 3 is opened, the air inlet channel 101 is communicated with the air outlet 201 to form an exhaust channel, namely, the required opening force can be detected through a sensor or a pressure signal, and then the piston valve clack 3 is opened actively through external force. An air outlet channel 103 is arranged at one end of the valve rod 15 close to the piston valve clack 3, an air inlet of the air outlet channel 103 is communicated with the second through hole 102, an outlet of the air outlet channel 103 is communicated with the socket groove, and therefore air in the air inlet channel 101 can enter the air outlet channel 103 from the second channel and then enter the socket groove. Referring to the arrows near the two end faces of the piston valve flap 3 in fig. 1, that is, there is gas pressure on the sealing surface between the piston valve flap 3 and the valve seat 1 and on the other side of the piston valve flap 3, and the gas pressure on the other side of the piston valve flap 3 is greater than the gas pressure on the sealing surface between the piston valve flap 3 and the valve seat 1, so that the piston valve flap 3 cannot be separated from the valve seat 1 all the time to open the vent valve, and automatic exhaust cannot be performed. The structure ensures that the static pressure at the inlet is not larger any more, and the valve clack cannot be opened to release pressure. The potential safety hazard of personnel that the automatic mode of disappointing of having solved traditional atmospheric valve brought prevents to cause personnel's injury.
Referring to fig. 1, a flap cover 7 is provided between the piston flap 3 and the valve rod 15 in order to lock the piston flap 3 and the valve rod 15. The valve clack cover 7 is sleeved at one end, close to the piston valve clack 3, of the valve rod 15 and is connected with a groove of a columnar component of the piston valve clack 3, an outer tongue stop washer 6 is arranged between the valve clack cover 7 and the piston valve clack 3, the outer tongue stop washer 6 is bent at two sides and tightly clamps the valve clack cover 7, so that movable connection is formed between the piston valve clack 3 and the valve rod 15, the connection mode is favorable for centering, matching and sealing of the valve clack and the valve seat 1, and sealing leakage caused by unevenness of a sealing surface of the valve clack and the valve seat 1 due to deflection. Referring to fig. 4, after the valve clack cover 7 is locked, the valve clack cover 7 is tightly clamped by arranging an outer tongue stop washer 6, so that the connection between the piston valve clack 3 and the valve rod 15 is not easy to loosen and fall off.
In other partially preferred embodiments, the normally closed vent valve includes a spring seat 8 and a first spring 9; the spring seat 8 is sleeved on the outer wall of the valve rod 15 close to one end of the piston valve clack 3, and one end of the spring seat 8 is connected with the valve clack cover 7; the spring seat 8 plays a role in limiting and buffering the first spring 9. The first spring 9 is sleeved on the outer wall of one end, close to the piston valve clack 3, of the valve rod 15, the first spring 9 is located in the socket, one end of the first spring 9 is in contact with the bottom surface of the socket, and the other end of the first spring 9 is sleeved on the periphery of the spring seat 8. The first spring 9 has a check function. Preferably, a spring clamping piece 11 and a retaining ring 12 are arranged between the first spring 9 and the bottom surface of the socket groove, and the spring clamping piece 11 is positioned between the end part of the first spring 9 and the retaining ring 12.
In other preferred embodiments, the normally closed vent valve includes a second spring 16, the second spring 16 is sleeved on the outer wall of the valve rod 15 near one end of the adjusting disk 18, and the second spring 16 is located between the guide valve cover 10 and the adjusting disk 18. The second spring 16 has a check function.
In other partially preferred embodiments, and as shown in fig. 1, the piston flap 3 is provided with a guide ring 4, and the guide ring 4 is disposed near one end of the socket. An annular groove for installing the guide ring 4 is formed in the outer wall of the piston valve clack 3. The piston valve clack 3 is provided with a guide ring 4 which can play a role in supporting and guiding. The piston valve clack 3 and the valve seat 1 are aligned, matched and sealed.
In other preferred embodiments, the piston valve flap 3 is provided with the flange ring 5, so that the piston valve flap 3 is tightly matched with the inner wall of the socket groove, the sealing performance of the piston valve flap 3 and the socket groove is ensured, and gas in the guide valve cover 10 is prevented from leaking, so that the sealing surface between the piston valve flap 3 and the valve seat 1 is automatically opened. The Glan ring 5 is formed by combining a rubber O-shaped ring and a polytetrafluoroethylene ring. The flange ring 5 can play a role of double-acting piston sealing by applying force through the O-shaped ring. It has the advantages of low friction, high pressure resistance, etc.
In other preferred embodiments, in order to prevent leakage of the working medium and intrusion of external dust and foreign matter, a star-shaped packing 14 and a shaft steckel ring 13 are axially spaced from each other in the first through hole, and two sealing structures are formed between the valve stem 15 and the guide bonnet 10 so that the valve stem 15 is tightly fitted to the inner wall of the first through hole. Further ensure the leakproofness of guide valve lid 10, prevent that the gas in guide valve lid 10 from leaking, and result in the sealed face automatic opening between piston valve clack 3 and the valve seat 1.
In other partially preferred embodiments, the valve seat 1 and the valve housing 2 may be threadably connected. The outer wall of the valve seat 1 is provided with external threads, and the inner wall of the valve shell 2 is provided with internal threads; coating silica gel at the joint of the valve seat 1 and the valve shell 2, wherein the coating letai 596# high-temperature-resistant silica gel can be adopted; further ensuring the sealing performance of the joint of the valve seat 1 and the valve housing 2.
In other preferred embodiments, the guide valve cover 10 is connected with the valve housing 2 through threads and is provided with silica gel, the outer wall of the guide valve cover 10 is provided with external threads, and the inner wall of the valve housing 2 is provided with internal threads; silica gel is coated at the joint of the guide valve cover 10 and the valve casing 2, and the high-temperature resistant silica gel of Tulatai 596# can be adopted; further ensuring the sealing performance of the connection of the guide valve cover 10 and the valve housing 2.
The working principle of the normally closed emptying valve is as follows:
referring to fig. 1, as indicated by an arrow near the air inlet channel 101 in the figure, when the air pressure to be released into the air enters the piston valve flap 3 from the air inlet channel 101 of the valve seat 1, two paths of air pressure occur, the first path of air pressure flows to the sealing surface of the valve flap, the second path of air pressure flows to the second through hole 102 of the piston valve flap 3, the second path of air pressure directly rushes to the other end surface of the piston valve flap 3, and the air pressure on the reverse surface of the piston valve flap 3 is greater than the air pressure on the sealing surface of the piston valve flap 3, so the piston valve flap 3 cannot be separated from the valve seat 1 all the time to open the release valve, and only when the valve rod 15 on the.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A normally closed dump valve, comprising:
the valve shell is a cavity with two open ends, and the cavity is provided with an air outlet;
the valve seat is inserted into one open end of the cavity, an air inlet channel is arranged on the valve seat, and the air inlet channel can be communicated with the air outlet to form an exhaust channel;
one end of the guide valve cover is connected with the other open end of the cavity, and one end of the guide valve cover is inserted into the cavity from the other open end of the cavity; the guide valve cover is provided with a socket slot; the socket slot is positioned in the cavity and communicated with the cavity, and a first through hole is formed in the bottom of the socket slot;
the piston valve clack is arranged in the cavity, one end of the piston valve clack props against the end face of the valve seat to form a sealing face, so that an air outlet of the air inlet channel is blocked, the other end of the piston valve clack is inserted into the socket slot, the piston valve clack is tightly matched with the inner wall of the socket slot, the piston valve clack can move along the axial direction of the socket slot, the piston valve clack is provided with a second through hole which penetrates through the axial direction of the piston valve clack, the second through hole is communicated with the air outlet of the air inlet channel, and part of air to be released enters the other end of the piston valve clack from the second through hole, so that the air pressure of the end face of the;
one end of the valve rod penetrates into the socket slot from the first through hole and is connected with the other end of the piston valve clack, the other end of the valve rod is connected with an adjusting disc, and the valve rod and the piston valve clack are driven to move axially through the adjusting disc; an air outlet channel is arranged at one end, close to the piston valve clack, of the valve rod, an air inlet of the air outlet channel is communicated with the second through hole, and an outlet of the air outlet channel is communicated with the socket groove;
the valve clack cover is sleeved at one end, close to the piston valve clack, of the valve rod and connected with the piston valve clack, and is used for fixing the valve rod and the piston valve clack; an outer tongue locking washer is arranged between the valve clack cover and the piston valve clack and is bent at two sides to tightly clamp the valve clack cover.
2. The normally closed blow-off valve of claim 1 further comprising:
the spring seat is sleeved on the outer wall of one end, close to the piston valve clack, of the valve rod, and one end of the spring seat is connected with the valve clack cover;
the first spring is sleeved on the outer wall of one end, close to the piston valve clack, of the valve rod, the first spring is located in the bearing slot, one end of the first spring is in contact with the bottom surface of the bearing slot, and the other end of the first spring is sleeved on the periphery of the spring seat.
3. The normally closed vent valve of claim 2, wherein a spring clip and a retainer ring are disposed between the first spring and the bottom surface of the socket, the spring clip being located between the first spring end and the retainer ring.
4. The normally closed blow-off valve of claim 1 further comprising:
the second spring is sleeved on the outer wall of one end, close to the adjusting disc, of the valve rod, and the second spring is located between the guide valve cover and the adjusting disc.
5. The normally closed vent valve of claim 1, wherein the piston flap is provided with a guide ring, and wherein the guide ring is disposed proximate an end of the socket.
6. A normally closed vent valve as defined in claim 5 wherein the piston flap is provided with a gram ring to mate the piston flap with the inner wall of the socket.
7. A normally closed vent valve as defined in any one of claims 1 to 6, wherein the first through hole is provided with a star-shaped seal ring and a shaft steckel ring at an interval in the axial direction so that the valve stem is closely fitted to the inner wall of the first through hole.
8. A normally closed blow off valve according to any of claims 1 to 6 wherein the valve seat is threadedly connected to the valve housing.
9. The normally closed vent valve of claim 8, wherein the connection between the valve seat and the valve housing is made of silicone.
10. A normally closed blow off valve according to any of claims 1 to 6 wherein the pilot valve cap is threadably connected to the valve housing; the guide valve cover with the connection position of valve casing sets up silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021221138.1U CN212509542U (en) | 2020-06-28 | 2020-06-28 | Normally closed emptying valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021221138.1U CN212509542U (en) | 2020-06-28 | 2020-06-28 | Normally closed emptying valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212509542U true CN212509542U (en) | 2021-02-09 |
Family
ID=74439050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021221138.1U Active CN212509542U (en) | 2020-06-28 | 2020-06-28 | Normally closed emptying valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212509542U (en) |
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2020
- 2020-06-28 CN CN202021221138.1U patent/CN212509542U/en active Active
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