CN111481053A - Multifunctional safety valve - Google Patents
Multifunctional safety valve Download PDFInfo
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- CN111481053A CN111481053A CN202010311474.3A CN202010311474A CN111481053A CN 111481053 A CN111481053 A CN 111481053A CN 202010311474 A CN202010311474 A CN 202010311474A CN 111481053 A CN111481053 A CN 111481053A
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- 238000007789 sealing Methods 0.000 claims abstract description 98
- 230000001681 protective effect Effects 0.000 claims description 32
- 238000009434 installation Methods 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/09—Safety devices
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a multifunctional safety valve, which comprises a valve seat and a valve core, wherein the valve seat is of a hollow structure, and the valve core is arranged in the valve seat in a vertically sliding manner; the case includes the valve rod, compression spring and sealing plug, there is the through-hole of vertical setting on the valve rod, there is the mounting groove of radially outwards offering on the through-hole inner wall, the sealing plug slides from top to bottom and sets up in the mounting groove, the lower peristomal of mounting groove can be closed to the sealing plug, and the biggest external diameter of sealing plug is less than the internal diameter of mounting groove, compression spring supports tightly on the last opening epitaxial wall of mounting groove in the upper end, its lower extreme sets up on the sealing plug and promotes the under shed of the closed mounting groove of sealing plug. When the pressure cooker body reaches high pressure, the safety valve can release pressure, so that the pressure in the pressure cooker body is prevented from being continuously increased, and the cooker body or food in the pressure cooker body is prevented from being damaged; the safety valve is provided with ultrahigh pressure protection, and when the pressure in the pressure cooker body reaches the ultrahigh pressure of 190KPa-300KPa, the safety valve can effectively release the pressure.
Description
Technical Field
The invention belongs to the technical field of safety valves, and particularly relates to a multifunctional safety valve.
Background
The safety valve is a valve arranged on the pressure cooker cover and has the functions of: when the pressure in the pressure cooker is higher than the external atmospheric pressure, the safety valve floats upwards under the pressure in the pressure cooker, so that the opening stopping plate arranged in the upper handle of the pressure cooker can be prevented from opening; when the pressure in the pressure cooker is equal to the atmospheric pressure, the safety valve falls back under the action of self gravity, so that a user can push the opening stop plate conveniently and open the cooker cover.
The existing safety valve has single function, for example, Chinese utility model patent with publication number CN2361196 discloses a partial structure of an open-stop valve rod of a pressure cooker, a through hole is arranged on the open-stop valve rod, and an fusible spacer is arranged in the through hole; when the pressure cooker can not release pressure due to high temperature and high pressure generated in the pressure cooker, the high-pressure gas in the pressure cooker can burst the fusible spacer and then rushes out of the cooker body through the through hole, thereby playing the effects of pressure release and exhaust. Although the above-described exhaust method can achieve a certain effect by exhausting air using the fusible spacer, the fusible spacer is a consumable and is easily damaged, and the opening pressure thereof is unstable.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a multifunctional safety valve which is simple in structure, convenient to install, multifunctional, stable in exhaust structure and not easy to damage.
The purpose of the invention is realized as follows: the utility model provides a multifunctional safety valve, the relief valve sets up on the pressure cooker pot lid, the relief valve receives can restrict the pressure cooker pot lid after high pressure and breaks away from the pressure cooker pot body which characterized in that: the safety valve comprises a valve seat and a valve core, the valve seat is fixed on a pressure cooker cover, the valve seat is of a hollow structure, and the valve core is arranged in the valve seat in a vertically sliding manner;
the valve core comprises a valve rod, a pressure spring and a sealing plug, wherein a through hole is vertically arranged on the valve rod, an installation groove which is radially and outwards formed in the inner wall of the through hole is formed in the through hole, the sealing plug is arranged in the installation groove in a vertically sliding mode, the sealing plug can cover the lower opening of the installation groove, the maximum outer diameter of the sealing plug is smaller than the inner diameter of the installation groove, the upper end of the pressure spring abuts against the outer extension wall of the upper opening of the installation groove, and the lower end of the pressure spring is arranged on the sealing plug and pushes the sealing plug to close the lower opening of the installation;
the internal pressure of pressure cooker pot can promote the valve rod come-up, stretch out the upper end of valve rod behind the disk seat, the pressure cooker pot cover locks on the pressure cooker pot body, is greater than at the internal pressure of pressure cooker pot when the decurrent power that the sealing plug received, sealing plug rebound and extrusion pressure spring, the mounting groove under shed is opened, the upper and lower port of valve rod through-hole is linked together.
By adopting the technical scheme, the valve seat is directly fixed in the mounting port on the pressure cooker during mounting, the valve rod moves downwards under the action of gravity when the air pressure in the pressure cooker is the same as the external atmospheric pressure, and at the moment, the valve rod does not extend out of the valve seat, namely, the stop plate on the cooker cover is not blocked, so that a user can directly take the cooker cover of the pressure cooker off the cooker body of the pressure cooker; when the air pressure in the pressure cooker rises, the valve rod floats upwards under the action of the air pressure, the upper end of the valve rod extends out of the valve seat and blocks the opening stopping plate on the cooker cover, and therefore a user cannot open the pressure cooker to protect the user;
in order to avoid that the pressure in the pressure cooker body is continuously increased to cause the pressure cooker to be damaged or to damage food in the pressure cooker, and to achieve high-pressure air pressure in the pressure cooker body, the pressure cooker needs to exhaust, the invention adopts a pressure spring and a sealing plug to block and conduct a through hole on a valve rod, wherein the elastic force of the pressure spring is F ═ kx, the pressure (air pressure) of the sealing plug separated from the lower port of the mounting groove can be directly calculated through the F value and the quality of the sealing plug, and the service life of the pressure spring is long and is not easy to damage;
after the internal atmospheric pressure of pressure cooker reached high-pressure atmospheric pressure, high-pressure gas in the pressure cooker can promote the sealing plug rebound to compress pressure spring, open the under shed of mounting groove, the internal atmospheric pressure of pressure cooker flows into the mounting groove in from the through-hole, in the exhaust duct flows into again, discharges from the export at last, for current exhaust mode, this exhaust apparatus is though simple structure, but the practicality is strong, life is high, and its gas discharge pressure value can the accurate calculation.
The invention is further configured to: there is the spacing ring of radial inside setting valve seat inner wall below, there are the first spacing portion and the spacing portion of second that set up from top to bottom on the valve rod outer wall, first spacing portion restriction the valve rod breaks away from downwards the valve seat, the spacing portion of second is used for the lid to close the lower port of valve seat and restriction the valve rod upwards breaks away from the valve seat.
By adopting the technical scheme, the valve seat is provided with the limiting ring, and the valve rod is provided with the first limiting part and the second limiting part, so that the valve rod can move up and down on the valve seat within a certain range; the second limiting part can be covered on the lower port of the valve seat, when the valve rod floats to the highest point, the lower port of the valve seat is covered by the second limiting part, so that the phenomenon that gas in the pressure cooker body overflows outwards when the gas pressure in the pressure cooker body does not reach high-pressure gas pressure is avoided, and the rising speed of the gas pressure in the pressure cooker body is improved.
The invention is further configured to: and a first air guide groove which is formed in the outer wall of the valve rod in the vertical direction and used for communicating the upper port with the lower port of the valve seat is formed in the outer wall of the valve rod, and the first air guide groove is positioned above the second limiting part.
Through adopting above-mentioned technical scheme, set up first air guide groove on the valve rod, when the pressure cooker pot body begins to preheat, the inside air conditioning can be followed first air guide groove and outwards discharged, and then can improve the temperature rising speed of the pressure cooker pot body to a certain extent.
The invention is further configured to: the outer wall of the valve rod is provided with a first annular limiting groove which is formed inwards in the radial direction, and the second limiting part is a sealing protective sleeve which is sleeved in the first annular limiting groove; when the internal pressure of pressure cooker pot is the superhigh pressure, the outer wall extrusion of port under the disk seat makes it drop downwards sealed protective sheath, the valve rod is followed the last port of disk seat breaks away from, the superhigh pressure is 190KPa-300 KPa.
By adopting the technical scheme, when the air pressure in the pressure cooker body gradually rises and exceeds the high-pressure air pressure, the air in the pressure cooker body can push the sealing plug to move upwards, when the sealing plug gradually moves to the opening on the mounting groove, the opening is sealed or reduced by the sealing plug, when the rising speed of the air pressure in the pressure cooker body is greater than the pressure relief speed, the air pressure in the pressure cooker body can be further gradually increased, and if the pressure relief is not carried out, the pressure cooker can be damaged; when the air pressure in the pressure cooker reaches the ultrahigh pressure, namely the air pressure is in the range of 190KPa-300KPa, the outer edge wall of the lower port of the valve seat can extrude the sealing protective sleeve and separate the sealing protective sleeve from the valve rod, so that the valve rod is separated from the upper port of the valve seat, a discharge port is enlarged, and the pressure of the pressure cooker can be relieved.
The invention is further configured to: the upper end face and the lower end face of the first annular limiting groove and the arc face of the side wall of the first annular limiting groove are integrated, the inner wall of the sealing protective sleeve is matched with the annular limiting groove, the outer diameter of the outer edge wall of the lower end face of the first annular limiting groove is smaller than that of the outer edge wall of the upper end face of the first annular limiting groove, and the lower end face of the first annular limiting groove and the outer edge wall of the lower end face of the first annular limiting groove are crossed by an arc angle.
By adopting the technical scheme, the lower end face of the first annular limiting groove is smaller than the upper end face of the first annular limiting groove, and when the air pressure is within the range of 190KPa-300KPa, the outer edge wall of the lower port of the valve seat can extrude the sealing protective sleeve and enable the sealing protective sleeve to be separated from the lower end face of the first annular limiting groove; the lower end face of the first annular limiting groove and the outer edge wall of the lower end face are crossed by an arc angle, so that the sealing protective sleeve is prevented from being scratched when falling off.
The invention is further configured to: the outer wall of the lower end of the valve rod is provided with a radially outward arranged anti-drop ring, the outer diameter of the anti-drop ring is larger than the outer diameter of the lower end face of the first annular limiting groove, the outer wall of the valve rod is provided with a second annular limiting groove which is radially inward arranged and is positioned between the first annular limiting groove and the anti-drop ring, the lower end of the second annular limiting groove extends to the anti-drop ring, the sealing protective sleeve drops on the second annular limiting groove after being separated from the first annular limiting groove, the side wall of the second annular limiting groove is provided with a second air guide groove which is vertically arranged, and the lower end of the second air guide groove extends to the lower end face of the valve rod; the valve rod floats to the sealing protection sleeve drops in behind the annular spacing inslot of second, the second air guide groove the terminal surface is outer along the wall under the first annular spacing groove and first annular spacing groove with the spacing ring inner wall the clearance between the disk seat inner wall forms superhigh pressure exhaust passage.
By adopting the technical scheme, under ultrahigh pressure, in order to exhaust gas quickly, the exhaust efficiency needs to be higher than the gas generation efficiency; the ultrahigh pressure protection is arranged, the ultrahigh pressure protection is carried out in a mode that the sealing protection sleeve is separated from the valve rod, and the valve rod is discharged from the upper port of the valve seat, so that the purpose of pressure relief is achieved, however, the mode has certain problems, although the exhaust efficiency is far higher than the efficiency of gas generation, the pressure relief can be carried out quickly, the sealing protection sleeve can fall into the pressure cooker body after being separated from the valve rod, not only can certain pollution be caused to food in the pressure cooker body, but also the valve core can be ejected from the upper port of the valve seat under the action of ultrahigh pressure gas because the valve core is not limited at the moment, so that certain potential safety hazards exist in the pressure relief mode;
in the invention, the valve rod is provided with the anti-drop ring, the second annular limiting groove and the second air guide groove, the outer diameter of the anti-drop ring is larger than the outer diameter of the outer edge wall of the lower end surface of the first annular limiting groove, and the outer diameter of the second air guide groove is smaller than the minimum outer diameter of the first air guide groove; under the ultrahigh pressure, the sealing protection sleeve drops on the second annular limiting groove and the anti-slip ring after being separated from the first annular limiting groove, and the valve rod can float upwards again under the ultrahigh pressure, so that the upper end face of the sealing protection sleeve is abutted against the outer edge wall of the lower port of the valve seat, and the lower end face of the sealing protection sleeve is abutted against the upper end face of the anti-slip ring.
The invention is further configured to: the lower end of the sealing plug is provided with a guide pillar with the lower end extending out of the lower port of the through hole, the guide pillar is prismatic, a third air guide groove is formed in a gap between the outer wall of the guide pillar and the inner wall of the through hole, and after the sealing plug is separated from the lower opening of the mounting groove, the lower port of the through hole is communicated with the mounting groove through the third air guide groove.
By adopting the technical scheme, in order to avoid dislocation of the sealing plug when the compression spring rebounds, the lower end of the sealing plug is provided with the guide pillar embedded into the through hole, the sealing plug is limited and guided by the guide pillar, and the third air guide groove on the guide pillar plays a role in air guide and exhaust; the lower end of the guide post extends out of the lower port of the through hole to prevent the through hole from being blocked by objects in the pressure cooker body, so that gas is difficult to discharge.
The invention is further configured to: and the adjacent side walls of the guide pillars are crossed by round corners.
Through adopting above-mentioned technical scheme, at the in-process that the guide pillar reciprocated, avoid the inner wall of fish tail valve rod through-hole.
The invention is further configured to: the valve core further comprises a warning rod located above the valve seat, the sealing protective sleeve on the valve rod is tightly abutted to the bottom of the valve seat, the sealing protective sleeve is located in the first annular limiting groove, the warning rod extends out of the pressure cooker cover, the lower end of the warning rod is in threaded connection with the upper end of the valve rod, and an exhaust pipeline communicated with the upper port of the through hole is further arranged above the warning rod.
By adopting the technical scheme, when the valve rod floats upwards, the warning rod on the valve rod can extend out of the pressure cooker cover, so that a user can visually know that the pressure cooker body is in a high-pressure state at the moment, the pressure cooker cover cannot be opened, and probing is not needed; when the air pressure in the pressure cooker body is consistent with the outside air pressure, the valve rod and the warning rod sink simultaneously, so that a user can know that the air pressure in the pressure cooker body is completely discharged at the moment, and the pressure cooker can be opened; wherein, be connected valve rod and warning pole through the screw thread to installation and dismantlement are convenient for.
The invention is further configured to: there is the handle that radially outwards sets up on the outer wall of warning pole upper end, exhaust duct's outer port is located on the up end or the lateral wall of handle.
Through adopting above-mentioned technical scheme, set up the handle on warning pole in order to facilitate the user installation case, set up exhaust duct's outer port on the up end of handle or the side to gas emission is convenient for.
The invention has the beneficial effects that: 1. when the pressure in the pressure cooker body reaches a safe pressure value, the valve rod floats upwards, and the warning rod is arranged on the valve rod, so that the warning rod extends out of the pressure cooker cover, and a warning effect can be further played for a user; 2. when the pressure cooker body reaches high pressure, the safety valve can release pressure, so that the pressure in the pressure cooker body is prevented from being continuously increased, and the cooker body or food in the pressure cooker body is prevented from being damaged; 3. the safety valve is provided with ultrahigh pressure protection, and when the pressure in the pressure cooker body reaches the ultrahigh pressure of 190KPa-300KPa, the safety valve can effectively release the pressure; 4. the valve rod is provided with the first air guide groove, when the pressure cooker body begins to be preheated, cold air in the valve rod can be discharged outwards from the first air guide groove, and the temperature rising speed of the pressure cooker body can be further improved to a certain degree.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic illustration of the construction of the valve stem of the present invention;
FIG. 4 is a schematic view of the structure of the present invention mounted on the lid of a pressure cooker;
FIG. 5 is a schematic view of the high pressure relief state of the present invention;
FIG. 6 is a schematic diagram illustrating the state of ultra-high pressure relief according to the present invention;
the reference numbers in the figures are: 1. a valve seat; 11. a limiting ring; 2. a valve core; 21. a valve stem; 211. a through hole; 212. mounting grooves; 213. a first limiting part; 214. sealing a protective sleeve; 215. a first gas guiding groove; 216. a first annular limiting groove; 217. the anti-drop ring; 218. a second annular limiting groove; 219. a second gas guiding groove; 22. a warning lever; 221. an exhaust duct; 222. a handle; 23. a pressure spring; 24. a sealing plug; 241. a guide post; 2411. and a third air guide groove.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description clearly and completely describes the technical solution in the embodiments of the present invention with reference to the accompanying drawings:
a multifunctional safety valve is arranged on a pressure cooker cover, and can limit the pressure cooker cover to be separated from the pressure cooker body after being pressurized, wherein as shown in figures 1 and 2, the safety valve comprises a valve seat 1 and a valve core 2, the valve seat 1 is fixed on the pressure cooker cover, the valve seat 1 is of a hollow structure, and the valve core 2 is arranged in the valve seat 1 in a vertically sliding manner;
the valve core 2 comprises a valve rod 21, a pressure spring 23 and a sealing plug 24, wherein the valve rod 21 is provided with a through hole 211 which is vertically arranged, the inner wall of the through hole 211 is provided with a mounting groove 212 which is radially outwards opened, the sealing plug 24 is vertically and slidably arranged in the mounting groove 212, the sealing plug 24 can cover the lower opening of the mounting groove 212, the maximum outer diameter of the sealing plug 24 is smaller than the inner diameter of the mounting groove 212, the upper end of the pressure spring 23 is abutted against the outer extension wall of the upper opening of the mounting groove 212, and the lower end of the pressure spring is arranged on the sealing plug 24 and pushes the sealing;
the pressure in the pressure cooker body can push the valve rod 21 to float upwards, after the upper end of the valve rod 21 extends out of the valve seat 1, the pressure cooker cover is locked on the pressure cooker body, when the pressure in the pressure cooker body is larger than the downward force borne by the sealing plug 24, the sealing plug 24 moves upwards and extrudes the pressure spring 23, the lower opening of the mounting groove 212 is opened, and the upper port and the lower port of the through hole 211 of the valve rod 21 are communicated.
When the pressure cooker cover is installed, as shown in fig. 4, the valve seat 1 is directly fixed in the installation opening on the pressure cooker cover, when the air pressure in the pressure cooker is the same as the external atmospheric pressure, the valve rod 21 moves downwards under the action of gravity, and at the moment, because the valve rod 21 does not extend out of the valve seat 1, namely, the stop plate on the pressure cooker cover is not blocked, a user can directly take the pressure cooker cover off the pressure cooker body; when the air pressure in the pressure cooker rises, the valve rod 21 floats upwards under the action of the air pressure, the upper end of the valve rod extends out of the valve seat 1 and blocks the opening stopping plate on the cooker cover, and therefore a user cannot open the pressure cooker to protect the user;
as shown in fig. 2 and 5, in order to avoid that the pressure in the pressure cooker body is continuously increased to cause the pressure cooker to be damaged or to damage food in the pressure cooker, and to avoid the situation that the pressure cooker body needs to be exhausted when reaching high pressure, the invention adopts the pressure spring 23 and the sealing plug 24 to block and conduct the through hole 211 on the valve rod 21, wherein F is-kx, the pressure (air pressure) of the lower port of the mounting groove 212 of the sealing plug 24 can be directly calculated by the F value and the mass of the sealing plug 24, and the service life of the pressure spring 23 is long and is not easy to damage;
after the pressure in the pressure cooker body reaches the high-pressure, the high-pressure gas in the pressure cooker can push the sealing plug 24 to move upwards, the pressure spring 23 is compressed, the lower opening of the mounting groove 212 is opened, the pressure in the pressure cooker body flows into the mounting groove 212 from the through hole 211, then flows into the exhaust pipeline 221, and finally is discharged from the outlet.
As shown in fig. 2, a radially inward limiting ring 11 is disposed below an inner wall of the valve seat 1, an upper and a lower first limiting portions 213 and a lower second limiting portion are disposed on an outer wall of the valve rod 21, the first limiting portion 213 limits the valve rod 21 to be separated from the valve seat 1, and the second limiting portion is used for covering a lower port of the valve seat 1 and limiting the valve rod 21 to be separated from the valve seat 1.
The valve seat 1 is provided with a limit ring 11, and the valve rod 21 is provided with a first limit part 213 and a second limit part, so that the valve rod 21 can move up and down on the valve seat 1 within a certain range; the second limiting part can be arranged at the lower port of the valve seat 1 in a covering mode, when the valve rod 21 floats upwards to the highest point, the lower port of the valve seat 1 is covered by the second limiting part, so that the phenomenon that gas in the pressure cooker body overflows outwards when the gas pressure in the pressure cooker body does not reach high-pressure gas pressure is avoided, and the rising speed of the gas pressure in the pressure cooker body is improved.
As shown in fig. 3, a first air guide groove 215 that is opened along the vertical direction and is used for communicating the upper and lower ports of the valve seat 1 is formed on the outer wall of the valve rod 21, and the first air guide groove 215 is located above the second limiting portion.
Through the first air guide groove 215 formed on the valve rod 21, when the pressure cooker body starts to be preheated, cold air in the pressure cooker body can be discharged outwards from the first air guide groove 215, and the temperature rising speed of the pressure cooker body can be further improved to a certain extent.
As shown in fig. 2 and 3, a first annular limiting groove 216 is formed in the outer wall of the valve rod 21 and radially inwardly opened, and the second limiting portion is a sealing protective sleeve 214 sleeved in the first annular limiting groove 216, wherein the sealing protective sleeve 214 is made of high-temperature-resistant food-grade plastic; when the pressure in the pressure cooker body is ultrahigh pressure, the outer edge wall of the lower port of the valve seat 1 extrudes the sealing protective sleeve 214 and enables the sealing protective sleeve to fall off downwards, the valve rod 21 is separated from the upper port of the valve seat 1, and the ultrahigh pressure is 190-300 KPa.
As shown in fig. 6, when the air pressure in the pressure cooker body gradually rises and exceeds the high-pressure air pressure, the air in the pressure cooker body pushes the sealing plug 24 to move upwards, when the sealing plug 24 gradually moves to the upper opening of the mounting groove 212, the sealing plug 24 seals or reduces the opening, when the rising rate of the air pressure in the pressure cooker body is greater than the pressure relief rate, the air pressure in the pressure cooker body further gradually increases, and if the pressure is not relieved, the pressure cooker is damaged; when the air pressure in the pressure cooker reaches the ultrahigh pressure, namely the air pressure is in the range of 190KPa-300KPa, the outer edge wall of the lower port of the valve seat 1 extrudes the sealing protective sleeve 214 and enables the sealing protective sleeve 214 to be separated from the valve rod 21, so that the valve rod 21 is separated from the upper port of the valve seat 1, a drainage port is enlarged, and the pressure of the pressure cooker can be relieved.
The upper end surface, the lower end surface and the side wall of the first annular limiting groove 216 are arc surfaces which are integrated, the inner wall of the sealing protective sleeve 214 is matched with the annular limiting groove, the outer diameter of the outer edge wall of the lower end surface of the first annular limiting groove 216 is smaller than that of the outer edge wall of the upper end surface of the first annular limiting groove, and the lower end surface of the first annular limiting groove 216 and the outer edge wall of the lower end surface are crossed by an arc angle.
The lower end surface of the first annular limiting groove 216 is smaller than the upper end surface thereof, and when the air pressure is within the range of 190KPa-300KPa, the outer edge wall of the lower port of the valve seat 1 can extrude the sealing protective sleeve 214 and make the sealing protective sleeve break away from the lower end surface of the first annular limiting groove 216; the lower end surface of the first annular limiting groove 216 and the outer edge wall of the lower end surface are crossed by an arc angle, so as to avoid scratching when the sealing protective sleeve 214 falls off.
As shown in fig. 1, 2 and 3, an anti-drop ring 217 is arranged on an outer wall of a lower end of the valve rod 21 and radially outward, an outer diameter of the anti-drop ring 217 is larger than an outer diameter of a lower end face of the first annular limiting groove 216, a second annular limiting groove 218 is arranged on an outer wall of the valve rod 21 and radially inward and located between the first annular limiting groove 216 and the anti-drop ring 217, a lower end of the second annular limiting groove 218 extends to the anti-drop ring 217, the sealing protective sleeve 214 drops on the second annular limiting groove 218 after separating from the first annular limiting groove 216, a second air guide groove 219 is arranged on a side wall of the second annular limiting groove 218 in a vertical direction, and a lower end of the second air guide groove 219 extends to a lower end face of the valve rod 21; after the valve rod 21 floats to the sealing protection sleeve 214 and falls into the second annular limiting groove 218, the outer edge wall of the lower end surface of the second air guide groove 219 and the first annular limiting groove 216 and the gap between the first annular limiting groove 216 and the inner wall of the limiting ring 11 and the inner wall of the valve seat 1 form an ultrahigh pressure exhaust channel.
Under ultrahigh pressure, in order to enable rapid exhaust, the efficiency of exhaust needs to be greater than that of gas generation; the ultrahigh pressure protection is arranged, the ultrahigh pressure protection is carried out in a mode that the sealing protection sleeve 214 is separated from the valve rod 21, and the valve rod 21 is discharged from the upper port of the valve seat 1, so that the purpose of pressure relief is achieved, however, the mode has a certain problem, although the exhaust efficiency is far higher than the efficiency of gas generation, the pressure relief can be carried out quickly, the sealing protection sleeve 214 can fall into a pressure cooker body after being separated from the valve rod 21, not only can certain pollution be caused to food in the pressure cooker body, but also the valve core 2 can be ejected from the upper port of the valve seat 1 under the action of ultrahigh pressure gas because the valve core 2 is not limited, so that certain potential safety hazard exists in the pressure relief mode;
for the purpose, the valve rod 21 is provided with an anti-drop ring 217, a second annular limiting groove 218 and a second air guide groove 219, the outer diameter of the anti-drop ring 217 is larger than the outer diameter of the outer edge wall of the lower end surface of the first annular limiting groove 216, and the outer diameter of the second air guide groove 219 is smaller than the minimum outer diameter of the first air guide groove 215; under ultrahigh pressure, the sealing protection sleeve 214 falls on the second annular limiting groove 218 and the anti-drop ring 217 after separating from the first annular limiting groove 216, and the valve rod 21 floats upwards again under ultrahigh pressure, so that the upper end surface of the sealing protection sleeve 214 abuts against the outer edge wall of the lower port of the valve seat 1, and the lower end surface abuts against the upper end surface of the anti-drop ring 217, at this time, ultrahigh pressure gas in the pressure cooker pot body flows to the outer edge wall of the lower end surface of the first annular limiting groove 216 and the first annular limiting groove 216 along the second annular limiting groove 218 and the second gas guide groove 219, and is finally discharged from the upper port of the valve seat 1, thereby achieving the purpose of pressure relief.
As shown in fig. 2, the lower end of the sealing plug 24 is provided with a guide post 241, the lower end of which extends out of the lower port of the through hole 211, the guide post 241 is prism-shaped, a third air guide groove 2411 is formed by a gap between the outer wall of the guide post 241 and the inner wall of the through hole 211, and after the sealing plug 24 is separated from the lower opening of the mounting groove 212, the lower port of the through hole 211 is communicated with the mounting groove 212 by the third air guide groove 2411.
In order to avoid the dislocation of the sealing plug 24 when the compression spring rebounds, a guide post 241 embedded in the through hole 211 is arranged at the lower end of the sealing plug 24, the sealing plug 24 is limited and guided by the guide post 241, and the third air guide groove 2411 on the guide post 241 plays a role in guiding air and exhausting air; the lower end of the guide post 241 extends out of the lower port of the through hole 211 to avoid the blockage of the through hole 211 by the objects in the pressure cooker body, which leads to the difficulty of exhausting gas.
Preferably, the adjacent side walls of the guide pillar 241 are crossed by round corners. In the process of moving the guide post 241 up and down, the inner wall of the through hole 211 of the valve rod 21 can be prevented from being scratched.
As shown in fig. 1, fig. 2, fig. 4 and fig. 5, the valve core 2 further includes a warning rod 22 located above the valve seat 1, the sealing protective sleeve 214 on the valve rod 21 abuts against the bottom of the valve seat 1, and when the sealing protective sleeve 214 is located in the first annular limiting groove 216, the warning rod 22 extends out of the pressure cooker lid, the lower end of the warning rod 22 is in threaded connection with the upper end of the valve rod 21, and an exhaust duct 221 communicating with the upper port of the through hole 211 is further arranged above the warning rod 22.
When the valve rod 21 floats upwards, the warning rod 22 on the valve rod can extend out of the pressure cooker cover, so that a user can intuitively know that the pressure cooker body is in a high-pressure state at the moment, the pressure cooker cover cannot be opened, and probing is not needed; when the air pressure in the pressure cooker body is consistent with the outside air pressure, the valve rod 21 and the warning rod 22 sink simultaneously, so that a user can know that the air pressure in the pressure cooker body is completely discharged at the moment, and the pressure cooker can be opened; wherein, the valve rod 21 and the warning rod 22 are connected by screw threads for convenient installation and disassembly.
The outer wall of the upper end of the warning rod 22 is provided with a handle 222 which is arranged radially outwards, and the outer port of the exhaust pipe 221 is positioned on the upper end surface of the handle 222.
The handle 222 is provided on the warning lever 22 to facilitate the user to install the valve cartridge 2, and the outer port of the exhaust pipe 221 is provided on the upper end surface of the handle 222 to facilitate the gas discharge.
Optimally, in order to avoid the user when observing the safety valve, the gas discharged from the outer port of the exhaust pipeline 221 is upwards sprayed and applied to the human body, and the outer port of the exhaust pipeline 221 is arranged on the side surface of the handle 222, so that the exhaust efficiency is improved, the outer ports of the exhaust pipeline 221 can be arranged in four, and the four outer ports are circumferentially and uniformly distributed on the side wall of the handle 222.
The above-mentioned embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained by those skilled in the art based on the above-mentioned embodiments should also belong to the protection scope of the present invention without any creative effort, so that: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a multifunctional safety valve, the relief valve sets up on the pressure cooker pot lid, the relief valve receives can restrict the pressure cooker pot lid after high pressure and breaks away from the pressure cooker pot body which characterized in that: the safety valve comprises a valve seat (1) and a valve core (2), the valve seat (1) is fixed on a pressure cooker cover, the valve seat (1) is of a hollow structure, and the valve core (2) is arranged in the valve seat (1) in a vertically sliding mode;
the valve core (2) comprises a valve rod (21), a pressure spring (23) and a sealing plug (24), wherein a through hole (211) is vertically formed in the valve rod (21), an installation groove (212) which is radially and outwards formed in the inner wall of the through hole (211), the sealing plug (24) is arranged in the installation groove (212) in a sliding mode up and down, the sealing plug (24) can cover the lower opening of the installation groove (212), the maximum outer diameter of the sealing plug (24) is smaller than the inner diameter of the installation groove (212), the upper end of the pressure spring (23) is tightly abutted to the outer extending wall of the upper opening of the installation groove (212), and the lower end of the pressure spring is arranged on the sealing plug (24) and pushes the sealing plug (24) to close the lower opening of the installation groove (212);
the internal pressure of pressure cooker can promote valve rod (21) come-up, stretch out the upper end of valve rod (21) disk seat (1) back, the pressure cooker pot cover locks on the pressure cooker pot body, and internal pressure at the pressure cooker is greater than during the decurrent power that sealing plug (24) received, sealing plug (24) rebound and extrusion pressure spring (23), mounting groove (212) under shed is opened, the upper and lower port of valve rod (21) through-hole (211) is linked together.
2. A multi-functional safety valve according to claim 1, characterized in that: there is spacing ring (11) of radial inward setting valve seat (1) inner wall below, there are first spacing portion (213) and the spacing portion of second that sets up from top to bottom on valve rod (21) outer wall, first spacing portion (213) restriction valve rod (21) break away from downwards valve seat (1), the spacing portion of second is used for the lid to close the lower port and the restriction of valve seat (1) valve rod (21) upwards break away from valve seat (1).
3. A multi-functional safety valve according to claim 2, characterized in that: and a first air guide groove (215) which is formed in the outer wall of the valve rod (21) along the vertical direction and used for communicating the upper port with the lower port of the valve seat (1), wherein the first air guide groove (215) is positioned above the second limiting part.
4. A multi-functional safety valve according to claim 2 or 3, characterized in that: a first annular limiting groove (216) formed in the outer wall of the valve rod (21) in the radial inward direction, and the second limiting part is a sealing protective sleeve (214) sleeved in the first annular limiting groove (216); when the internal pressure of pressure cooker pot is the superhigh pressure, the outer wall extrusion of port under disk seat (1) sealed protective sheath (214) and make it drop downwards, valve rod (21) are followed the last port of disk seat (1) breaks away from, the superhigh pressure is 190KPa-300 KPa.
5. The multi-functional safety valve of claim 4, wherein: the upper end face, the lower end face and the side wall of the first annular limiting groove (216) are arc faces which are integrated, the inner wall of the sealing protective sleeve (214) is matched with the annular limiting groove, the outer diameter of the outer edge wall of the lower end face of the first annular limiting groove (216) is smaller than that of the outer edge wall of the upper end face of the first annular limiting groove, and the lower end face of the first annular limiting groove (216) and the outer edge wall of the lower end face of the first annular limiting groove are crossed by an arc angle.
6. The multi-functional safety valve of claim 5, wherein: an anti-falling ring (217) which is arranged outwards in the radial direction is arranged on the outer wall of the lower end of the valve rod (21), the outer diameter of the anti-falling ring (217) is larger than the outer diameter of the lower end face of the first annular limiting groove (216), a second annular limiting groove (218) which is arranged inwards in the radial direction and is positioned between the first annular limiting groove (216) and the anti-falling ring (217) is arranged on the outer wall of the valve rod (21), the lower end of the second annular limiting groove (218) extends onto the anti-falling ring (217), the sealing protective sleeve (214) falls onto the second annular limiting groove (218) after separating from the first annular limiting groove (216), a second air guide groove (219) which is arranged in the vertical direction is arranged on the side wall of the second annular limiting groove (218), and the lower end of the second air guide groove (219) extends to the lower end face of the valve rod (21); the valve rod (21) floats to the sealing protective sleeve (214) drops in the second annular limiting groove (218), and then the second air guide groove (219) is formed in the lower end face of the first annular limiting groove (216), along the outer wall of the lower end face of the first annular limiting groove (218), and the gap between the first annular limiting groove (218) and the inner wall of the limiting ring (11) and the inner wall of the valve seat (1) forms an ultrahigh pressure exhaust channel.
7. The multi-functional safety valve of claim 6, wherein: the lower end of the sealing plug (24) is provided with a guide post (241) of which the lower end extends out of the lower port of the through hole (211), the guide post (241) is prism-shaped, a gap between the outer wall of the guide post and the inner wall of the through hole (211) forms a third air guide groove (2411), and after the sealing plug (24) is separated from the lower opening of the mounting groove (212), the lower port of the through hole (211) is communicated with the mounting groove (212) through the third air guide groove (2411).
8. A multi-functional safety valve according to claim 7, characterized in that: and the adjacent side walls of the guide columns (241) are crossed by round corners.
9. A multi-functional safety valve according to claim 8, characterized in that: valve core (2) still including being located warning pole (22) of disk seat (1) top, sealing protective sleeve (214) on valve rod (21) support tightly disk seat (1) bottom, just sealing protective sleeve (214) are located during in first annular spacing groove (216), warning pole (22) are stretched out from the pressure cooker pot lid, the lower extreme of warning pole (22) with the upper end threaded connection of valve rod (21), the top of warning pole (22) still is provided with the intercommunication exhaust duct (221) of port on through-hole (211).
10. A multi-functional safety valve according to claim 9, characterized in that: the outer wall of the upper end of the warning rod (22) is provided with a handle (222) which is arranged outwards in the radial direction, and the outer port of the exhaust pipeline (221) is positioned on the upper end face or the side wall of the handle (222).
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| CN202010311474.3A CN111481053B (en) | 2020-04-20 | 2020-04-20 | Multifunctional safety valve |
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| CN202010311474.3A CN111481053B (en) | 2020-04-20 | 2020-04-20 | Multifunctional safety valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111904864A (en) * | 2020-09-03 | 2020-11-10 | 温州医科大学附属第一医院 | Traditional Chinese medicine decocting device |
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| CN111481053B (en) | 2024-08-20 |
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