CN107836999B - Automatic pressure relief exhaust valve - Google Patents
Automatic pressure relief exhaust valve Download PDFInfo
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- CN107836999B CN107836999B CN201710779844.4A CN201710779844A CN107836999B CN 107836999 B CN107836999 B CN 107836999B CN 201710779844 A CN201710779844 A CN 201710779844A CN 107836999 B CN107836999 B CN 107836999B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 195
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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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
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/58—Safety devices
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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
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
- A47J31/462—Dispensing spouts, pumps, drain valves or like liquid transporting devices with an intermediate liquid storage tank
- A47J31/467—Dispensing spouts, pumps, drain valves or like liquid transporting devices with an intermediate liquid storage tank for the infusion
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses an automatic pressure relief exhaust valve, which comprises a valve body, a pressure relief exhaust joint and a valve core, wherein a pressure relief groove is formed in the cavity wall of a pressure relief cavity along the axial direction; the tail part of the first water inlet cavity is communicated with the pressure release cavity, a water passing hole is formed in the side wall of the water passing cavity, and a first water outlet hole is formed in the tail part of the first water outlet cavity; the pressure relief emptying joint is sleeved in the connecting cavity, the head part of the second water inlet cavity is communicated with the reflux cavity through the second water inlet hole, and the tail part of the second water outlet cavity is provided with a second water outlet hole; the core rod is sleeved with a compression spring, two ends of the compression spring are respectively abutted against the rear end face of the connecting rod and the tail end face of the second water inlet cavity, an exhaust channel is arranged on the front end face of the core cap along the radial direction, the core cap is in clearance fit with the pressure release cavity, a first sealing ring used for being in contact sealing with the pressure release cavity is sleeved on the core cap, and a second sealing ring used for being in contact sealing with the cavity wall of the second water inlet cavity is sleeved on the connecting rod. The automatic pressure relief exhaust valve can automatically relieve pressure of the pressure type coffee machine and automatically empty the electromagnetic pump.
Description
Technical Field
The invention relates to a coffee machine accessory, in particular to an automatic pressure relief exhaust valve.
Background
The pressure type coffee machine uses pressurized hot water to extract coffee, generally, an electromagnetic pump is adopted to pressurize the water and then the water is introduced into a boiler of the coffee machine for heating, and then the hot water with pressure in the boiler is introduced into a brewing assembly of the coffee machine for brewing the coffee; after coffee is brewed, the electromagnetic pump stops working, a passage between the electromagnetic pump and the brewing assembly and the interior of the boiler still have great pressure, the pressure in the brewing assembly can influence the next coffee brewing, and at the moment, the pressure relief treatment is needed for the coffee machine; the electromagnetic pump is not suitable for a long time, air exists in the electromagnetic pump, and if the electromagnetic pump is not subjected to evacuation treatment during reuse, the air in the electromagnetic pump can not be discharged easily, and the electromagnetic pump can not be supplied with water to damage the electromagnetic pump; in order to enable the electromagnetic pump and the coffee machine to work normally, the existing pressure type coffee machine generally adopts a three-way electromagnetic valve to automatically release or empty, but the three-way electromagnetic valve occupies large space, has a complex structure and is expensive, the production cost of enterprises can be improved, and the profit of the enterprises is greatly reduced.
Disclosure of Invention
The invention aims to provide the automatic pressure relief exhaust valve with a simple structure, so as to solve the problems in the prior art, realize the function of automatic pressure relief and exhaust of a coffee machine, have the advantages of simple working principle, convenient assembly and reliable performance, and overcome the defect of greatly increasing the cost of the whole machine by adopting a three-way electromagnetic valve.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an automatic pressure relief exhaust valve, which comprises a valve body, a pressure relief evacuation joint and a valve core, wherein a first water inlet cavity, a first water outlet cavity and a backflow cavity are arranged in the valve body, the backflow cavity comprises a pressure relief cavity, a water passing cavity and a connecting cavity which are sequentially communicated from front to back, a pressure relief groove is formed in the cavity wall of the pressure relief cavity along the axial direction, and the pressure relief groove extends from the front end face of the pressure relief cavity to the rear end face of the pressure relief cavity; the head of the first water inlet cavity is provided with a first water inlet hole so as to be communicated with a water outlet pipe of the electromagnetic pump, the tail of the first water inlet cavity is communicated with the pressure relief cavity through a pressure relief hole, the cross section area of the pressure relief groove is smaller than that of the pressure relief hole, the side wall of the water passing cavity is provided with a water passing hole communicated with the head of the first water outlet cavity, and the tail of the first water outlet cavity is provided with a first water outlet hole so as to be communicated with a water inlet pipe of the boiler; the pressure relief emptying connector is sleeved in the connecting cavity and comprises a second water inlet cavity and a second water outlet cavity which are communicated with each other, the head part of the second water inlet cavity is communicated with the reflux cavity through a second water inlet hole, and a second water outlet hole is formed in the tail part of the second water outlet cavity; the valve core comprises a core cap, a connecting rod and a core rod which are sequentially connected and integrally formed, a compression spring is sleeved outside the core rod, two ends of the compression spring are respectively propped against the rear end face of the connecting rod and the tail end face of the second water inlet cavity in an initial state, the core cap is propped against the pressure release hole, an exhaust channel is arranged on the front end face of the core cap, the exhaust channel extends from the front end face of the core cap to the side wall of the core cap at the contact position of the pressure release hole, the core cap is in clearance fit with the pressure release cavity, a first sealing ring used for being in contact with the pressure release cavity is sleeved on the core cap, a second sealing ring used for being in contact with the cavity wall of the second water inlet cavity is sleeved on the connecting rod, the second sealing ring is located outside the pressure release emptying joint, and the distance between the first sealing ring and the rear end face of the pressure release cavity is not less than that between the second sealing ring and the front end face of the pressure release emptying joint.
Preferably, the pressure relief emptying connector is connected to the cavity wall of the connecting cavity in a sealing manner in a rotary clamping manner.
Preferably, a third sealing ring is sleeved outside the head of the pressure relief emptying connector, and the third sealing ring is in contact sealing with the cavity wall of the connecting cavity.
Preferably, the cavity wall of the pressure relief cavity is provided with a plurality of pressure relief grooves, and the sum of the cross sectional areas of the pressure relief grooves is smaller than the cross sectional area of the pressure relief hole.
Preferably, the diameter of the core cap is larger than that of the connecting rod, the diameter of the connecting rod is larger than that of the core rod, and the connecting rod is in clearance fit with the second water inlet cavity; the core cap is characterized in that a first annular groove is formed in the outer wall of the core cap, a second annular groove is formed in the outer wall of the connecting rod, the first sealing ring is sleeved in the first annular groove, and the second sealing ring is sleeved in the second annular groove.
Preferably, the exhaust passage is a cross-shaped exhaust passage, and the center part of the cross-shaped passage is right opposite to the pressure relief hole.
Preferably, the rear end face of the second water inlet cavity is communicated with an accommodating cavity, the tail end of the accommodating cavity is closed, the core rod is in clearance fit with the accommodating cavity, and the distance between the rear end face of the core rod and the rear end face of the accommodating cavity is greater than the distance from the rear end face of the core cap to the front end face of the pressure relief emptying connector.
Preferably, the first sealing ring, the second sealing ring and the third sealing ring are all O-shaped sealing rings.
Preferably, the pressure relief and evacuation joint is a plastic pressure relief and evacuation joint, the valve body is a plastic valve body, the valve core is a plastic valve core, and the compression spring is a stainless steel spring.
Preferably, the diameter of the water passing cavity is larger than the diameter of the pressure release cavity.
Compared with the prior art, the invention has the following technical effects:
when the automatic pressure relief exhaust valve provided by the invention is used, the head of the first water inlet cavity of the valve body is connected with the water outlet pipe of the electromagnetic pump, the electromagnetic pump is internally provided with a one-way valve, the electromagnetic pump is connected with the water tank through the water inlet pipe, the tail of the first water outlet cavity is connected with the water inlet pipe of the boiler, the tail of the second water outlet cavity of the pressure relief exhaust joint is connected with the water tank or communicated with the atmosphere, water in the water tank is pressurized by the electromagnetic pump and then is introduced into the boiler through the automatic pressure relief exhaust valve to be heated, and hot water with pressure in the boiler is introduced into the brewing assembly of the coffee machine to brew coffee. If the electromagnetic pump does not work for a long time, air is stored in the electromagnetic pump, if the air is not discharged in time, the electromagnetic pump cannot be pumped with water to damage the electromagnetic pump when the coffee is brewed again, and therefore the air in the electromagnetic pump needs to be exhausted before the coffee is brewed again. When the automatic pressure relief exhaust valve provided by the invention is used, after the electromagnetic pump is opened, residual air in the electromagnetic pump sequentially enters the pressure relief and evacuation joint through the first water inlet cavity, the exhaust channel, the gap between the core cap and the pressure relief cavity, the pressure relief groove and the water passing cavity, and is discharged into a water tank or the atmosphere through the pressure relief and evacuation joint, so that the electromagnetic pump is prevented from being emptied; after the air is discharged, water in the water tank is introduced into the automatic pressure relief exhaust valve through the electromagnetic pump, and because the cross section area of the pressure relief groove is smaller than the cross section area of the pressure relief hole, when high-pressure water passes through, the force born by the valve core can be gradually increased, and when the force born by the valve core is larger than the resilience force of the compression spring, the valve core can move along the aspect of water flow, so that a second sealing ring on the valve core can block the second water inlet hole and the second water inlet cavity, the pressure relief emptying joint is sealed, the first water inlet cavity is communicated with the second water outlet cavity through the pressure relief cavity and the water passing cavity, and at the moment, a channel in the pressure relief emptying joint is closed.
When the coffee machine stops working, the electromagnetic pump stops working at the same time, the first water inlet cavity is not supplied with subsequent pressure, the valve core is restored to the initial state after receiving the resilience force of the compression spring, the two ends of the compression spring are respectively propped against the rear end face of the core cap and the tail end face of the second water inlet cavity, at the moment, the first water inlet cavity, the first water outlet cavity and the reflux cavity are communicated, high-pressure gas in the brewing assembly, the boiler and the corresponding connecting pipeline cannot flow into the electromagnetic pump through the first water inlet cavity due to the fact that the one-way valve is arranged in the electromagnetic pump, and the high-pressure gas in the brewing assembly, the boiler and the corresponding connecting pipeline sequentially passes through the first water outlet cavity, the reflux cavity and enters the pressure relief and evacuation joint, and is relieved to the water tank or the atmosphere through the second water outlet hole on the pressure relief and evacuation joint, so that the automatic pressure relief of the coffee machine is completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic axial sectional view of an automatic pressure relief vent valve according to the present invention in an initial state;
FIG. 2 is a schematic axial sectional view of the second sealing ring of the automatic pressure relief exhaust valve of the present invention when the second sealing ring just seals the second water inlet;
FIG. 3 is an enlarged partial schematic view of FIG. 2A;
FIG. 4 is a schematic view of an axial cross-section structure of the automatic pressure relief vent valve provided by the invention when the rear end face of the core cap contacts with the front end face of the pressure relief evacuation joint;
FIG. 5 is a schematic diagram of a disassembly structure of an automatic pressure relief vent valve provided by the invention;
FIG. 6 is a schematic axial sectional view of a valve body of an automatic pressure relief vent valve according to the present invention;
FIG. 7 is a schematic axial sectional view of a pressure relief vent fitting of an automatic pressure relief vent valve according to the present invention;
FIG. 8 is a schematic perspective view of an automatic pressure relief vent valve according to the present invention;
fig. 9 is a schematic diagram of a structure of a pressure relief groove of the automatic pressure relief vent valve provided by the invention;
in the figure: 100-valve body; 110-a first water inlet cavity; 111-a first water inlet; 112-a pressure relief vent; 120-a first water outlet cavity; 121-water passing holes; 122-a first water outlet; 130-a reflow chamber; 131-a pressure relief chamber; 132-a water passing chamber; 133-connecting the cavities; 134-pressure relief groove; 200-pressure relief emptying joint; 210-a second water inlet cavity; 211-a second water inlet hole; 220-a second water outlet chamber; 221-a second water outlet hole; 230-a receiving chamber; 300-valve core; 310-core cap; 311-exhaust passage; 320-connecting rods; 330-core bar; 400-compressing a spring; 500-a first sealing ring; 600-a second sealing ring; 700-third sealing ring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide the automatic pressure relief exhaust valve with a simple structure, so as to solve the problems in the prior art, realize the function of automatic pressure relief and exhaust of a coffee machine, have the advantages of simple working principle, convenient assembly and reliable performance, and overcome the defect of greatly increasing the cost of the whole machine by adopting a three-way electromagnetic valve.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides an automatic pressure relief exhaust valve, as shown in figures 1-9, comprising a valve body 100, a pressure relief emptying joint 200 and a valve core 300, wherein a first water inlet cavity 110, a first water outlet cavity 120 and a backflow cavity 130 are arranged in the valve body, the backflow cavity 130 comprises a pressure relief cavity 131, a water passing cavity 132 and a connecting cavity 133 which are sequentially communicated from front to back, a pressure relief groove 134 is axially formed in the cavity wall of the pressure relief cavity 131, the pressure relief groove 134 extends from the front end surface of the pressure relief cavity 131 to the rear end surface of the pressure relief cavity 131, and the diameter of the water passing cavity 132 is larger than that of the pressure relief cavity 131; the head of the first water inlet cavity 110 is provided with a first water inlet hole 111 to be communicated with a water outlet pipe of the electromagnetic pump, the tail of the first water inlet cavity 110 is communicated with a pressure release cavity 131 through a pressure release hole 112, the cross section area of a pressure release groove 134 is smaller than that of the pressure release hole 112, the side wall of the water passing cavity 132 is provided with a water passing hole 121 communicated with the head of the first water outlet cavity 120, and the tail of the first water outlet cavity 120 is provided with a first water outlet hole 122 to be communicated with a water inlet pipe of the boiler; the pressure relief emptying connector 200 is sleeved in the connecting cavity 133, the pressure relief emptying connector 200 comprises a second water inlet cavity 210 and a second water outlet cavity 220 which are communicated, the head part of the second water inlet cavity 210 is communicated with the reflux cavity 130 through a second water inlet hole 211, and a second water outlet hole 221 is formed in the tail part of the second water outlet cavity 220; the valve core 300 comprises a core cap 310, a connecting rod 320 and a core rod 330 which are sequentially connected and integrally formed, a compression spring 400 is sleeved outside the core rod 330, two ends of the compression spring 400 are respectively abutted against the rear end face of the connecting rod 320 and the tail end face of the second water inlet cavity 210 in an initial state, the core cap 310 is abutted against the pressure release hole 112, an exhaust channel 311 is arranged on the front end face of the core cap 310 along the radial direction, the exhaust channel 311 extends to the side wall of the core cap 310 from the contact position of the front end face of the core cap 310 with the pressure release hole 112, the core cap 310 is in clearance fit with the pressure release cavity 131, a first sealing ring 500 used for being in contact seal with the pressure release cavity 131 is sleeved on the core cap 310, a second sealing ring 600 used for being in contact seal with the cavity wall of the second water inlet cavity 210 is sleeved on the connecting rod 320, the second sealing ring 600 is positioned outside the pressure release joint 200, and the distance between the first sealing ring 500 and the rear end face of the pressure release cavity 131 is not smaller than the distance between the second sealing ring 600 and the front end face of the pressure release joint 200.
When the automatic pressure relief exhaust valve provided by the invention is used for automatic pressure relief of a pressure type coffee machine after coffee is boiled and automatic evacuation of an electromagnetic pump, the head of a first water inlet cavity 110 of a valve body 100 is connected with a water outlet pipe of the electromagnetic pump, the electromagnetic pump is connected with a water tank through a water inlet pipe, the tail of a first water outlet cavity 120 is connected with a water inlet pipe of a boiler, the tail of a second water outlet cavity 220 of a pressure relief evacuation joint 200 is connected with the water tank or is communicated with the atmosphere, water in the water tank is pressurized by the electromagnetic pump and then is introduced into the boiler through the automatic pressure relief exhaust valve to heat, hot water with pressure in the boiler is introduced into a brewing assembly of the coffee machine to brew coffee, and a one-way valve is arranged in the electromagnetic pump to enable water flow to flow into the coffee machine only from the electromagnetic pump through the automatic pressure relief exhaust valve. If the electromagnetic pump does not work for a long time, air is stored in the electromagnetic pump, if the air is not discharged in time, the electromagnetic pump cannot be filled with water to damage the electromagnetic pump when the coffee is brewed again, and therefore the air in the electromagnetic pump needs to be discharged before the coffee is brewed again. When the automatic pressure relief exhaust valve provided by the invention is used, after the electromagnetic pump is opened, residual air in the electromagnetic pump sequentially enters the pressure relief and evacuation joint 200 through the first water inlet cavity 110, the exhaust channel 311, the gap between the core cap 310 and the pressure relief cavity 131, the pressure relief groove 134 and the water passing cavity 132, and is discharged into a water tank or the atmosphere through the pressure relief and evacuation joint 200, so that the electromagnetic pump is prevented from being emptied; after the air in the electromagnetic pump is exhausted, water in the water tank is introduced into the automatic pressure relief exhaust valve through the electromagnetic pump, because the cross section area of the pressure relief groove 134 is smaller than that of the pressure relief hole 112, when high-pressure water is introduced into the pressure relief cavity 131 from the pressure relief hole 112, the water flow can only pass through the pressure relief groove 134, the valve core 300 is acted by the pressure left by the user and the force exerted by the valve core can be gradually increased, when the force exerted by the valve core 300 is greater than the resilience force of the compression spring 400, the valve core 300 moves along the aspect of the water flow, so that the second water inlet hole 211 and the second water inlet cavity 210 are blocked by the second sealing ring 600 on the valve core 300, the pressure relief emptying joint 200 is sealed, and the first water inlet cavity 110 is communicated with the first water outlet cavity 120 through the pressure relief cavity 131 and the water passing cavity 132, and at this time, the channel in the pressure relief emptying joint 200 is closed.
When the coffee machine stops working, the electromagnetic pump stops working at the same time, the first water inlet cavity 110 has no subsequent pressure supply, the valve core 300 is restored to the initial state after receiving the resilience force of the compression spring 400, the two ends of the compression spring 400 are respectively pressed against the rear end face of the core cap 310 and the tail end face of the second water inlet cavity 210, at this time, the first water inlet cavity 110, the first water outlet cavity 120 and the reflux cavity 130 are communicated, and because the electromagnetic pump is internally provided with the check valve, the high-pressure gas in the brewing assembly, the boiler and the corresponding connecting pipeline does not flow into the electromagnetic pump through the first water inlet cavity 110, and the high-pressure gas in the brewing assembly, the boiler and the corresponding connecting pipeline sequentially passes through the first water outlet cavity 120, the reflux cavity 130 and enters the pressure relief emptying joint 200, and is decompressed to the water tank or the atmosphere through the second water outlet hole 221 on the pressure relief emptying joint 200, so that the automatic pressure relief of the coffee machine is completed.
According to the automatic pressure relief exhaust valve provided by the invention, the valve core 300 reciprocates in the pressure relief cavity 131, the water passing cavity 132 and the second water inlet cavity 210 under the action of the elasticity of the compression spring 400 and the action of high-pressure water introduced by the electromagnetic pump; as shown in fig. 2 to 3, when the valve core 300 is moved towards the tail end of the second water inlet chamber 210 by the high pressure water introduced by the electromagnetic pump, the first sealing ring 500 arranged on the valve core cap 310 and the second sealing ring 600 arranged on the connecting rod 320 move together with the valve core 300, the distance between the first sealing ring 500 and the rear end surface of the pressure release cavity 131 is not smaller than the distance between the second sealing ring 600 and the front end surface of the pressure release emptying joint 200, after the second sealing ring 600 seals the second water inlet hole 211 and the second water inlet chamber 210, the first sealing ring 500 and the cavity wall of the pressure release cavity 131 are separated from contact, so that the water flow passage communicating the first water inlet chamber 110 and the first water outlet chamber 120 is enlarged, most of the water with higher pressure is enlarged, enters the water outlet chamber 132 and enters the boiler through the first water outlet chamber 120, and a sufficient water source is provided for the boiler, and more water is prevented from flowing out of the pressure release emptying joint 200.
In a further scheme, the pressure relief emptying connector 200 is connected to the cavity wall of the connecting cavity 133 in a sealing manner through a rotary clamping manner, and when the pressure relief emptying connector 200 is installed, the pressure relief emptying connector 200 is inserted into the valve body 100 first, and then the pressure relief emptying connector 200 is clamped on the cavity wall of the connecting cavity 133 of the valve body in a rotary manner by a certain angle, so that the installation is convenient and simple.
In a further scheme, as shown in fig. 1, the connection cavity 133 includes a stepped expansion hole, the head of the pressure relief evacuation connector 200 has a stepped side wall matching the stepped expansion hole, a third sealing ring 700 is disposed between the stepped side wall of the pressure relief evacuation connector 200 and the abutting surface of the stepped expansion hole of the connection cavity 133, and the third sealing ring 700 is in contact sealing with the cavity wall of the connection cavity 133.
In a further embodiment, as shown in fig. 9, a plurality of pressure relief grooves 134 are formed on the wall of the pressure relief cavity 131, and the sum of the cross-sectional areas of the pressure relief grooves 134 is smaller than the cross-sectional area of the pressure relief hole 112.
In a specific scheme, the diameter of the core cap 310 is larger than the diameter of the connecting rod 320, the diameter of the connecting rod 320 is larger than the diameter of the core rod 330, the diameter of the core cap 310 is larger than the diameter of the second water inlet hole 211, and the connecting rod 320 is in clearance fit with the second water inlet cavity 210; the outer side wall of the core cap 310 is provided with a first annular groove, the outer side wall of the connecting rod 320 is provided with a second annular groove, the first annular groove is sleeved with the first sealing ring 500, and the second annular groove is sleeved with the second sealing ring 600. The rear end surface of the second water inlet cavity 210 is communicated with an accommodating cavity 230, the tail end of the accommodating cavity 230 is closed, the core rod 330 is in clearance fit with the accommodating cavity 230, and the distance between the rear end surface of the core rod 330 and the rear end surface of the accommodating cavity 230 is greater than the distance from the rear end surface of the core cap 310 to the front end surface of the pressure relief evacuation joint 200.
As shown in fig. 2 to 3, when the valve core 300 moves toward the tail end of the second water inlet chamber 210 under the action of the high pressure water introduced by the electromagnetic pump, after the second sealing ring 600 seals the second water inlet hole 211 and the second water inlet chamber 210, the first sealing ring 500 and the cavity wall of the pressure release cavity 131 are separated from contact, and the high pressure water enters the boiler through the water passing cavity 132 and the first water outlet cavity 120; as shown in fig. 4, the valve core 300 continues to move towards the tail end of the second water inlet cavity 210 under the action of the high-pressure water introduced by the electromagnetic pump, the connecting rod 320 drives the second sealing ring 600 to move inside the second water inlet cavity 210, and the second sealing ring 600 keeps in sealing contact with the second water inlet cavity 210, so that a channel formed by the valve core 300 and the second water inlet cavity 210 keeps in a blocking state, and when the rear end surface of the core cap 310 is in contact with the front end surface of the pressure relief emptying joint 200, the valve core 300 stops moving; in the process that the valve core 300 moves toward the tail end of the second water inlet cavity 210, the accommodating cavity 230 can provide a large enough movement space for the movement of the core rod 330, so that the tail end of the core rod 330 also moves toward the rear end surface of the accommodating cavity 230 in the accommodating cavity 230.
In more specific solution, as shown in fig. 5, the exhaust channel 311 is a cross-shaped exhaust channel, and the center of the cross-shaped channel is opposite to the pressure release hole 112, when the electromagnetic pump is emptied, the air in the electromagnetic pump can be discharged to the gap between the core cap 310 and the pressure release cavity 131 through the cross-shaped channel, and then discharged through the pressure release groove 134.
The first seal ring 500, the second seal ring 600 and the third seal ring 700 are all O-ring type seal rings.
The pressure relief and evacuation joint 200 is a plastic pressure relief and evacuation joint 200, the valve body 100 is a plastic valve body, the valve core 300 is a plastic valve core 300, and the compression spring 400 is a stainless steel spring. The pressure relief and evacuation joint 200, the valve body and the valve core 300 of the automatic pressure relief and evacuation valve are all made of plastic materials, so that the production cost can be greatly reduced, and the profit of enterprises can be improved; however, the pressure relief and evacuation joint 200, the valve body 100 and the valve core 300 are not limited to plastic materials, and may be made of stainless steel materials, so that the evacuation and automatic pressure relief functions of the automatic pressure relief and evacuation valve can be satisfied.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (10)
1. An automatic pressure release discharge valve which characterized in that: comprising the following steps:
the valve body is internally provided with a first water inlet cavity, a first water outlet cavity and a backflow cavity, the backflow cavity comprises a pressure relief cavity, a water passing cavity and a connecting cavity which are sequentially communicated from front to back, a pressure relief groove is axially formed in the cavity wall of the pressure relief cavity, and the pressure relief groove extends from the front end face of the pressure relief cavity to the rear end face of the pressure relief cavity; the head of the first water inlet cavity is provided with a first water inlet hole so as to be communicated with a water outlet pipe of the electromagnetic pump, the tail of the first water inlet cavity is communicated with the pressure relief cavity through a pressure relief hole, the cross section area of the pressure relief groove is smaller than that of the pressure relief hole, the side wall of the water passing cavity is provided with a water passing hole communicated with the head of the first water outlet cavity, and the tail of the first water outlet cavity is provided with a first water outlet hole so as to be communicated with a water inlet pipe of the boiler;
the pressure relief emptying connector is sleeved in the connecting cavity and comprises a second water inlet cavity and a second water outlet cavity which are communicated with each other, the head part of the second water inlet cavity is communicated with the backflow cavity through a second water inlet hole, and a second water outlet hole is formed in the tail part of the second water outlet cavity;
and the valve core comprises a core cap, a connecting rod and a core rod which are sequentially connected and integrally formed, a compression spring is sleeved outside the core rod, two ends of the compression spring are respectively propped against the rear end face of the connecting rod and the tail end face of the second water inlet cavity in an initial state, the core cap is propped against the pressure release hole, an exhaust channel is arranged on the front end face of the core cap, the exhaust channel extends from the contact position of the front end face of the core cap with the pressure release hole to the side wall of the core cap, the core cap is in clearance fit with the pressure release cavity, a first sealing ring used for being in contact with the pressure release cavity is sleeved on the core cap, a second sealing ring used for being in contact with the cavity wall of the second water inlet cavity is sleeved on the connecting rod, the second sealing ring is positioned outside the pressure release emptying joint, and the distance between the first sealing ring and the rear end face of the pressure release cavity is not less than the distance between the second sealing ring and the front end face of the pressure release emptying joint.
2. The automatic pressure relief vent valve of claim 1, wherein: the pressure relief emptying connector is connected to the cavity wall of the connecting cavity in a sealing mode through a rotary clamping mode.
3. The automatic pressure relief vent valve of claim 2, wherein: and a third sealing ring is sleeved outside the head part of the pressure relief emptying joint and is in contact sealing with the cavity wall of the connecting cavity.
4. The automatic pressure relief vent valve of claim 1, wherein: the pressure relief cavity is characterized in that a plurality of pressure relief grooves are formed in the cavity wall of the pressure relief cavity, and the sum of the cross sectional areas of the pressure relief grooves is smaller than the cross sectional area of the pressure relief hole.
5. The automatic pressure relief vent valve of claim 1, wherein: the diameter of the core cap is larger than that of the connecting rod, the diameter of the connecting rod is larger than that of the core rod, and the connecting rod is in clearance fit with the second water inlet cavity; the core cap is characterized in that a first annular groove is formed in the outer wall of the core cap, a second annular groove is formed in the outer wall of the connecting rod, the first sealing ring is sleeved in the first annular groove, and the second sealing ring is sleeved in the second annular groove.
6. The automatic pressure relief vent valve of claim 1, wherein: the exhaust passage is a cross-shaped exhaust passage, and the center part of the cross-shaped passage is right opposite to the pressure relief hole.
7. The automatic pressure relief vent valve of claim 1, wherein: the second water inlet cavity is communicated with the rear end face of the second water inlet cavity, the tail end of the accommodating cavity is closed, the core rod is in clearance fit with the accommodating cavity, and the distance between the rear end face of the core rod and the rear end face of the accommodating cavity is larger than the distance from the rear end face of the core cap to the front end face of the pressure relief emptying connector.
8. The automatic pressure relief vent valve of claim 3, wherein: the first sealing ring, the second sealing ring and the third sealing ring are all O-shaped sealing rings.
9. The automatic pressure relief vent valve of claim 1, wherein: the pressure relief and evacuation joint is a plastic pressure relief and evacuation joint, the valve body is a plastic valve body, the valve core is a plastic valve core, and the compression spring is a stainless steel spring.
10. The automatic pressure relief vent valve of claim 1, wherein: the diameter of the water passing cavity is larger than that of the pressure relief cavity.
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| CN201710779844.4A CN107836999B (en) | 2017-09-01 | 2017-09-01 | Automatic pressure relief exhaust valve |
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| CN201710779844.4A CN107836999B (en) | 2017-09-01 | 2017-09-01 | Automatic pressure relief exhaust valve |
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| CN107836999B true CN107836999B (en) | 2023-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108518511B (en) * | 2018-05-19 | 2023-08-22 | 中山市美图塑料工业有限公司 | Flushing valve with automatic switching function |
| CN113685580B (en) * | 2021-08-11 | 2024-07-30 | 深圳华星恒泰泵阀有限公司 | Hydraulic two-position three-way valve |
| CN114868545B (en) * | 2022-05-25 | 2023-07-25 | 安徽蓝瑞农林科技有限公司 | Microporous check quick sucking needle type trunk medicine injection device for pine wood nematode disease |
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