CN111828685A - Isolated two-position three-way valve - Google Patents
Isolated two-position three-way valve Download PDFInfo
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- CN111828685A CN111828685A CN202010864368.8A CN202010864368A CN111828685A CN 111828685 A CN111828685 A CN 111828685A CN 202010864368 A CN202010864368 A CN 202010864368A CN 111828685 A CN111828685 A CN 111828685A
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- valve
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- sealing ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
Abstract
The invention discloses an isolated two-position three-way valve which comprises a valve body, a valve core, a reset spring, a piston and a mandril, wherein the valve core, the reset spring, the piston and the mandril are packaged in the valve body; the valve core and the return spring are both packaged in the medium cavity, the piston is packaged in the control cavity, two ends of the ejector rod are respectively connected with the valve core and the piston, and the piston pushes the valve core through the ejector rod to open or close the valve. The isolated two-position three-way valve provided by the invention has a simple internal structure, and uses air pressure (or hydraulic pressure) to be matched with the return spring as the driving force of the valve action to push the piston to move. And a spring energy storage sealing ring is arranged on the piston to realize dynamic sealing of the control cavity. An isolation cavity is arranged between the medium cavity and the fluid action cavity to realize medium isolation, and leaked fluid is guided away when the medium cavity and the fluid action cavity are leaked, so that the media can be prevented from being mutually crossed.
Description
Technical Field
The application belongs to the technical field of valves, concretely relates to two three-way valves of isolated.
Background
The two-position three-way valve is widely applied to the fields of petrochemical industry and ferrous metallurgy, and has the main structure that three fluid medium interfaces are arranged on a valve body, a valve cavity communicated with the three fluid medium interfaces is arranged inside the valve body, a movable valve core is arranged in the valve cavity, and the on-off of channels between different interfaces on the valve body is controlled by changing the position of the valve core. The valve core moves under the action of injected high-pressure fluid, and if the control fluid is gas, the valve is in a pneumatic control type; if the control fluid is liquid, the valve is in a hydraulic control type.
The problems of valve core damage and medium leakage frequently occur in the use process of the existing two-position three-way valve, and the application of the two-position three-way valve in the high-end industrial field is limited.
Disclosure of Invention
In order to solve the technical problem, the invention provides an isolated two-position three-way valve which has long service life and can prevent a working medium and a control fluid from being mutually connected.
The technical scheme adopted for achieving the purpose of the invention is that the isolated two-position three-way valve comprises a valve body, and a valve core, a return spring, a piston and an ejector rod which are packaged in the valve body, wherein:
a medium cavity and a control cavity are arranged in the valve body, and the medium cavity is communicated with the control cavity through a ejector rod hole; a control port, a discharge port and 3 fluid medium interfaces are arranged on the shell of the valve body; the control port and the discharge port are respectively communicated with the control cavity; the 3 fluid medium interfaces are respectively a fluid inlet, a fluid outlet and a discharge port, and the 3 fluid medium interfaces are respectively communicated with the medium cavity;
the valve core and the return spring are both packaged in the medium cavity; the piston is packaged in the control cavity, a first sealing ring is arranged between the piston and the control cavity, and the control cavity is divided into an isolation cavity communicated with the discharge port and a fluid action cavity communicated with the control port through the piston and the first sealing ring;
the ejector rod is arranged in the ejector rod hole in a penetrating mode, and two ends of the ejector rod are connected with the valve core and the piston respectively; the valve core is driven by the ejector rod and is switched between two states of conducting the fluid inlet and the fluid outlet and conducting the fluid inlet and the drain outlet;
and a second sealing ring is arranged between the ejector rod and the ejector rod hole, and the medium cavity and the control cavity are isolated into two independent cavities through the ejector rod and the second sealing ring.
Optionally, the first sealing ring is a spring energy storage sealing ring; the second sealing ring is a spring energy storage sealing ring.
Optionally, the valve body includes a valve seat and end covers located at two ends of the valve seat, and the discharge port and the control port are respectively disposed on the two end covers.
Optionally, a third sealing ring is arranged between the valve seat and the end cover provided with the control port.
Optionally, the core body of the valve core is a stepped shaft, and the middle part of the stepped shaft is provided with a positioning step for mounting the return spring; the core body is connected with the ejector rod, and the end faces of the two ends of the core body are respectively used for plugging the fluid outlet and the discharge outlet.
Optionally, a guide shaft protruding towards the medium cavity is arranged on the valve body, and the discharge port is arranged in the guide shaft; the end part of the guide shaft is provided with a boss, the opening of the discharge port is positioned on the table top of the boss, and the end face of one end of the core body is tightly attached to the table top of the boss so as to seal the discharge port.
Optionally, the valve core comprises the core body and a guide sleeve, and the guide sleeve is sleeved on the guide shaft and can axially move along the guide shaft; the reset spring is sleeved on the guide sleeve and is positioned through the positioning step.
Optionally, the guide sleeve is uniformly provided with more than 2 medium flow through holes along the circumferential direction, and the discharge port is communicated with the medium cavity through the medium flow through holes.
Optionally, a fourth sealing ring is arranged between the core body and the valve body, and the fourth sealing ring is located at the end part of the core body connected with the ejector rod.
Optionally, a circle of protrusions is arranged on a portion of the valve body, which is in contact with the core, and when the core is in contact with the valve body to block the fluid outlet, the protrusions compress the fourth sealing ring.
According to the technical scheme, the isolated two-position three-way valve comprises a valve body, a valve core, a return spring, a piston and a push rod, wherein the valve core, the return spring, the piston and the push rod are packaged in the valve body, a cavity in the valve body comprises a medium cavity for working fluid medium circulation and a control cavity for controlling fluid action, a push rod hole for installing the push rod is formed between the medium cavity and the control cavity, and after the push rod is installed, the medium cavity and the control cavity are isolated into two independent cavities through the push rod and a second sealing ring, so that isolation between the working medium and the control fluid is realized.
Compared with the existing two-position three-way valve, when the valve core is driven by high-pressure control fluid, the high-pressure control fluid directly acts on the valve core, and the direct impact of the high-pressure control fluid is easy to damage the valve core.
The piston is packaged in the control cavity and sealed through the first sealing ring, so that the control cavity is divided into an isolation cavity and a fluid action cavity, the isolation cavity is arranged between the medium cavity and the fluid action cavity, and on one hand, the isolation cavity plays a role in isolating a medium; on the other hand, when the medium cavity and the fluid action cavity are leaked, the leaked working medium or control fluid can be guided away through the discharge port, and therefore mutual media crossing is prevented.
Compared with the prior art, the isolated two-position three-way valve provided by the invention has the advantages that the piston and the ejector rod are arranged to be in contact with a control fluid medium, so that direct impact of the control fluid on the valve core is avoided, and the valve core is prevented from being damaged by direct impact; the isolation cavity is arranged to isolate the working medium from the control fluid, and the leaked medium can be guided away when the working medium or the control fluid leaks, so that the media are prevented from being mutually crossed. The key parts in the isolated two-position three-way valve are not easy to damage, so that the service life is long, the isolation of internal media is good, and the valve is favorable for application in the high-precision industrial field.
Drawings
FIG. 1 is a full-sectional structural view of an isolated two-position three-way valve in a state of conduction at a drain outlet according to an embodiment of the present invention;
fig. 2 is a full-section structural diagram of the isolated two-position three-way valve in the outlet conduction state in the embodiment of the invention.
Description of reference numerals: 100-an isolated two-position three-way valve; 10-valve body, 11-valve seat, 12a/12 b-end cover, 13-guide shaft, 14-boss and 15-bulge; 20-valve core, 21-core body, 22-guide sleeve, 23-positioning step and 24-medium circulation hole; 30-a return spring; 40-ejector pin; 50-a piston; 60-a media chamber; 70-control chamber, 71-isolation chamber, 72-fluid action chamber; 80-ejector pin holes; 91-first seal ring, 92-second seal ring, 93-third seal ring, 94-fourth seal ring.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
An isolated two-position three-way valve 100 is shown in fig. 1 and 2, and mainly includes a valve body 10, and a valve core 20, a return spring 30, a piston 50, and a push rod 40, which are packaged in the valve body 10. The two-position three-way valve refers to that the valve core 20 in the valve has 2 position states (open and close) in total, and three corresponding passage interfaces (A, B, C). When working, the 2 position states can make the 3 interfaces connected in pairs (open: A is connected with B, close: A is connected with C). The structure of each component of the isolated two-position three-way valve 100 according to the embodiment of the present invention is described in detail below with reference to an exemplary embodiment:
the valve body 10 is a mounting base for each part of the isolated two-position three-way valve 100, and the valve core 20, the return spring 30, the piston 50 and the ejector rod 40 are all mounted and fixed through the valve body 10. For the installation of this valve of convenience in inside maintenance, valve body 10 adopts split type structure in this embodiment, refer to fig. 1, and valve body 10 includes disk seat 11 and is located the end cover 12 at disk seat both ends, and discharge opening C and control port F set up respectively on two end covers 12, for the convenience difference, be close to case 20 in two end covers mark as end cover 12a, be close to piston 50 mark as end cover 12 b. A third seal 93 is provided between the valve seat 11 and the end cap 12b to prevent leakage of the control fluid.
The structure of the valve body 10 limits the "access" and "service position" of the valve. Specifically, referring to fig. 1, the valve body 10 has a hollow valve cavity including three cavity medium chambers 60, a control chamber 70 and a tappet hole 80, wherein the medium chamber 60 is a region through which a working medium is in fluid communication, the control chamber 70 is a region through which a control fluid flows, the medium chamber 60 and the control chamber 70 are in communication through the tappet hole 80, and the tappet hole 80 is used for mounting the tappet 40.
The casing of the valve body 10 is provided with 5 ports for communicating the valve chamber with the outside, which are shown in fig. 1 and 2 as a control port F, a discharge port T and 3 fluid medium ports. The control port F and the discharge port T communicate with the control chamber 70, respectively. The 3 fluid medium ports are respectively a fluid inlet A for fluid medium inflow, a fluid outlet B for fluid medium outflow and a drain outlet C for fluid medium drain, and the 3 fluid medium ports are respectively communicated with the medium cavity 60.
Referring to fig. 1 and 2, the valve core 20 and the return spring 30 are both enclosed in the medium chamber 60, the piston 50 is enclosed in the control chamber 70, the push rod 40 is installed in the push rod hole 80 in a penetrating manner, and two ends of the push rod 40 are respectively connected with the valve core 20 and the piston 50. The valve body 20 is driven by the plunger 40, and switches between two states of conducting the fluid inlet a and the fluid outlet B and conducting the fluid inlet a and the drain outlet C. Specifically, when the control fluid applies force to the piston 50, the piston 50 pushes the valve spool 20 forward by the push rod against the elastic force of the return spring 30. When the control fluid is discharged, the valve spool 20 is pushed to return to the original position by the elastic force of the return spring 30. The control fluid does not contact the valve spool 20 during the entire operation.
Referring to fig. 1, in order to prevent the control fluid from leaking, a first sealing ring 91 is provided between the piston 50 and the control chamber 70, and a second sealing ring 92 is provided between the stem 40 and the stem hole 80. The control chamber 70 is divided by the piston 50 and the first seal ring 91 into two separate chambers, a separation chamber 71 and a fluid working chamber 72, wherein the separation chamber 71 is communicated with the discharge port T, and the fluid working chamber 72 is communicated with the control port F. The medium chamber 60 and the control chamber 70 are separated into two independent chambers by the push rod 40 and the second seal ring 92. That is, the whole isolated two-position three-way valve 100 has 3 independent and mutually sealed and isolated cavities inside: a medium cavity 60, an isolation cavity 71 and a fluid action cavity 72, wherein the isolation cavity 71 is positioned in the medium cavity 60 and the fluid action cavity 72 and isolates media and prevents the media from mutually crossing.
The first sealing ring 91 and the second sealing ring 92 can adopt any existing sealing form such as an O-shaped rubber sealing ring and a metal corrugated pipe. In this embodiment, the first seal ring 91 and the second seal ring 92 are both spring energy storage seal rings. The spring energy storage sealing ring comprises a sealing shell and a spring arranged in the sealing shell, the spring is arranged in a groove, the spring is pressed to form outward tension to enable a sealing lip to be tightly attached to the sealing groove, and the spring permanently provides elastic force for the sealing lip, so that abrasion of the sealing shell and eccentricity of a matched part can be compensated, and sealing in a range from vacuum to low pressure is formed. In addition, the system pressure can assist the spring to store energy, and the larger the pressure is, the more fully the sealing lip is attached to the groove, so that a high-pressure seal is formed. The sealing shell is made of PTFE, filled PTFE, PEEK, filled PEEK, PVDF, PPS or other high-performance polymer materials through mechanical processing, and the materials determine that the spring energy storage sealing ring is suitable for sealing almost all liquid, chemicals and gas within the temperature range from minus 268 ℃ to plus 427 ℃. And can be stored indefinitely without aging problems. The metal spring has various forms to choose, and has O type spring, V type spring, U type spring, satisfies the sealed requirement of different motion forms.
In the isolated two-position three-way valve 100 of the present embodiment, the valve core 20 adopts a special structure, referring to fig. 1, the valve core 20 includes a core body 21 and a guide sleeve 22, the core body 21 is used for connecting the return spring 30 and the push rod 40, and blocking the fluid outlet B and the drain outlet C. Specifically, the core body 21 is a stepped shaft with a convex section, the middle part of the core body is provided with a positioning step 23 for installing the return spring 30, the end surfaces of two shaft sections of the core body 21 are respectively used for plugging the fluid outlet B and the discharge outlet C, and the ejector rod 40 is connected with the large shaft section of the core body 21.
In order to realize effective blocking and prevent medium leakage or pressure release, a guide shaft 13 protruding towards the medium cavity 60 is arranged on the end cover 12a of the valve body 10 at the small shaft end of the core body 21, namely, at one side of the blocking discharge port C, the discharge port C is arranged in the guide shaft 13, and the guide shaft 13 increases the extending length of the discharge port C. The end of the guide shaft 13 is provided with a boss 14, and the opening of the discharge port C is located on the top of the boss 14, as shown in fig. 2. By processing the boss 14 table surface with higher surface flatness, the small shaft end surface of the core body 21 can be ensured to be tightly attached to the boss 14 table surface under the pressure action of the control fluid, so that the working medium is prevented from leaking.
In order to realize effective blocking, and prevent medium leakage or pressure release, a fourth sealing ring 94 is disposed at the large axial end of the core body 21, i.e. at the side for blocking the fluid outlet B, the fourth sealing ring 94 is specifically mounted in a sealing groove formed at the large axial end of the core body 21, and a circle of protrusions 15 is disposed at the portion of the valve seat 11 contacting with the core body 21, as shown in fig. 2. When the core body 21 contacts the valve body 10 and blocks the fluid outlet B, the protrusion 15 presses the fourth sealing ring 94, as shown in fig. 1.
The guide sleeve 22 is used for improving the movement precision of the valve core 20, the guide sleeve 22 is sleeved on the guide shaft 13 and can axially move along the guide shaft 13, the guide sleeve 22 and the guide shaft 13 are preferably in clearance fit, the movement precision is guaranteed, and a working medium can serve as a lubricant between the guide sleeve 22 and the guide shaft 13. More than 2 medium flow through holes 24 are uniformly arranged on the guide sleeve 22 along the circumferential direction, and the discharge hole C is communicated with the medium cavity 60 through the medium flow through holes 24. The return spring 30 is sleeved on the guide sleeve 22, one end of the return spring abuts against the inner end face of the end cover 12a, and the other end of the return spring is positioned through the positioning step 23.
The isolated two-position three-way valve provided by the embodiment of the invention can adopt any one of the following working forms: 1. the working medium is liquid; 2. the working medium is gas; 3. the working medium is gas; 4. the working medium of the hydraulic control valve is liquid.
Taking a first working form of 'pneumatic control valve, working medium is liquid' as an example, the working principle of the isolated two-position three-way valve provided by the embodiment of the invention is as follows:
A. when high-pressure gas in the valve pneumatic control port F leaks out, the return spring 30 pushes the valve core 30 to move towards the right side, the right end face of the valve core 30 is landed on the protrusion 15 of the valve seat 11, the valve is in a closed state, the fluid inlet a is communicated with the drain port C and is isolated from the fluid outlet B, the flow path of the working fluid medium is shown as a dotted line a in fig. 1, and the flow direction is shown as an arrow in fig. 1.
B. When the high-pressure gas in the valve pneumatic control port F is pressurized, the high-pressure gas pushes the piston 50 to move left, the piston 50 pushes the valve element 30 to move to the left side through the ejector rod 40, the left end face of the valve element 30 falls on the end cover 12a, the valve is in an open state, the fluid inlet a is communicated with the fluid outlet B and isolated from the discharge port C, the flow path of the working fluid medium is shown by a dotted line B in fig. 2, and the flow direction is shown by an arrow in fig. 2.
Application example:
in the liquid rocket engine, valves with different functions are needed to control the circulation of propellant, cut off and reverse so as to control the working state of the rocket engine. Compared with a two-position two-way valve (stop valve), the two-position three-way valve is relatively complex in structure and relatively high in failure rate, so that the two-position three-way valve is less applied to a low-temperature engine, and generally one stop valve is installed on each passage. This is one of the factors that limit the application of two-position three-way valves in cryogenic engines.
The second factor limiting the application of the two-position three-way valve in the low-temperature engine is the sealing form of the valve, and the traditional liquid rocket engine valve adopts an O-shaped rubber sealing ring (normal-temperature propellant) and a metal corrugated pipe (low-temperature propellant) as the dynamic sealing form of the traditional liquid rocket engine valve. The O-shaped rubber sealing ring is difficult to be used for low-temperature propellants at present, the pressure application range is narrow, and the O-shaped rubber sealing ring has the advantages of simple structure and is the most common normal-temperature sealing form; the metal corrugated pipe has the advantages that zero leakage can be achieved, but for valves with high medium pressure and large size, the metal corrugated pipe is difficult to manufacture, high in production cost, long in period, large in structural space and less in application to two-position three-way valves.
The isolated two-position three-way valve provided by the embodiment of the invention can be perfectly applied to liquid rocket engines and other low-temperature engines. On one hand, the isolated two-position three-way valve provided by the embodiment of the invention has a simple internal structure, and the valve core is not directly contacted with a control fluid, so that the fault rate is low. On the other hand, in the isolated two-position three-way valve provided by the embodiment of the invention, the two key sealing rings are both spring energy storage sealing rings, and compared with an O-shaped rubber sealing ring, the spring energy storage sealing ring can be used in a higher pressure range and a wider temperature range, especially on a low-temperature liquid rocket engine and on ultra-low-temperature valves such as liquid hydrogen, liquid methane, liquid oxygen and the like; compared with a metal corrugated pipe sealing structure, the high-pressure metal corrugated pipe sealing structure can solve the problems of high development difficulty, long production period and high cost of the high-pressure metal corrugated pipe, occupies a smaller space structure, and can reduce the whole volume and weight of the valve.
In addition, when the isolated two-position three-way valve provided by the embodiment of the invention is applied to liquid rocket engines and other low-temperature engines, one two-position three-way valve plays the role of two stop valves, so that one valve is saved, and members such as pipelines, joints, connections and the like are saved, which is very important for load reduction of aircrafts and aerospace equipment.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) according to the isolated two-position three-way valve provided by the invention, the piston and the ejector rod are arranged to be in contact with a control fluid medium, so that direct impact of the control fluid on the valve core is avoided, and the valve core is prevented from being damaged by direct impact. The key parts in the isolated two-position three-way valve are not easy to damage, so that the service life is long, the isolation of internal media is good, and the valve is favorable for application in the high-precision industrial field.
2) The isolated two-position three-way valve provided by the invention can meet the requirement of a liquid rocket engine on the two-position three-way valve, save the number of valves and optimize a system pipeline; the problems of narrow temperature application range, high-pressure large-size development difficulty, long production period and high cost of the traditional two-position three-way valve are solved.
3) The isolated two-position three-way valve provided by the invention has a simple internal structure, and uses air pressure (or hydraulic pressure) to be matched with the spring as the driving force of the valve action to push the piston to move. And a spring energy storage sealing ring is arranged on the piston to realize dynamic sealing of the control cavity. An isolation cavity is arranged between the medium cavity and the fluid action cavity to realize medium isolation, and leaked fluid is guided away when the medium cavity and the fluid action cavity are leaked, so that the media can be prevented from being mutually crossed.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. The utility model provides a two three-way valves of isolated, its characterized in that: including the valve body, and encapsulate in case, reset spring, piston and the ejector pin in the valve body, wherein:
a medium cavity and a control cavity are arranged in the valve body, and the medium cavity is communicated with the control cavity through a ejector rod hole; a control port, a discharge port and 3 fluid medium interfaces are arranged on the shell of the valve body; the control port and the discharge port are respectively communicated with the control cavity; the 3 fluid medium interfaces are respectively a fluid inlet, a fluid outlet and a discharge port, and the 3 fluid medium interfaces are respectively communicated with the medium cavity;
the valve core and the return spring are both packaged in the medium cavity; the piston is packaged in the control cavity, a first sealing ring is arranged between the piston and the control cavity, and the control cavity is divided into an isolation cavity communicated with the discharge port and a fluid action cavity communicated with the control port through the piston and the first sealing ring;
the ejector rod is arranged in the ejector rod hole in a penetrating mode, and two ends of the ejector rod are connected with the valve core and the piston respectively; the valve core is driven by the ejector rod and is switched between two states of conducting the fluid inlet and the fluid outlet and conducting the fluid inlet and the drain outlet;
and a second sealing ring is arranged between the ejector rod and the ejector rod hole, and the medium cavity and the control cavity are isolated into two independent cavities through the ejector rod and the second sealing ring.
2. The isolated two-position, three-way valve of claim 1, wherein: the first sealing ring is a spring energy storage sealing ring; the second sealing ring is a spring energy storage sealing ring.
3. The isolated two-position, three-way valve of claim 1, wherein: the valve body comprises a valve seat and end covers positioned at two ends of the valve seat, and the discharge port and the control port are respectively arranged on the two end covers.
4. An isolated two-position three-way valve according to claim 3, wherein: and a third sealing ring is arranged between the valve seat and the end cover provided with the control port.
5. An isolated two-position three-way valve according to any one of claims 1 to 4, wherein: the core body of the valve core is a stepped shaft, and the middle part of the stepped shaft is provided with a positioning step for mounting the return spring; the core body is connected with the ejector rod, and the end faces of the two ends of the core body are respectively used for plugging the fluid outlet and the discharge outlet.
6. An isolated two-position three-way valve according to claim 5, wherein: the valve body is provided with a guide shaft protruding towards the medium cavity, and the discharge port is arranged in the guide shaft; the end part of the guide shaft is provided with a boss, the opening of the discharge port is positioned on the table top of the boss, and the end face of one end of the core body is tightly attached to the table top of the boss so as to seal the discharge port.
7. The isolated two-position, three-way valve of claim 6, wherein: the valve core comprises the core body and a guide sleeve, and the guide sleeve is sleeved on the guide shaft and can axially move along the guide shaft; the reset spring is sleeved on the guide sleeve and is positioned through the positioning step.
8. The isolated two-position, three-way valve of claim 7, wherein: more than 2 medium flow through holes are uniformly formed in the guide sleeve along the circumferential direction, and the discharge port is communicated with the medium cavity through the medium flow holes.
9. An isolated two-position three-way valve according to claim 5, wherein: and a fourth sealing ring is arranged between the core body and the valve body, and the fourth sealing ring is positioned on the end part of the core body connected with the ejector rod.
10. An isolated two-position three-way valve according to claim 9, wherein: and a circle of bulges are arranged on the part of the valve body, which is in contact with the core body, and when the core body is in contact with the valve body and blocks the fluid outlet, the bulges compress the fourth sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864368.8A CN111828685A (en) | 2020-08-25 | 2020-08-25 | Isolated two-position three-way valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864368.8A CN111828685A (en) | 2020-08-25 | 2020-08-25 | Isolated two-position three-way valve |
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| CN111828685A true CN111828685A (en) | 2020-10-27 |
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| CN202010864368.8A Pending CN111828685A (en) | 2020-08-25 | 2020-08-25 | Isolated two-position three-way valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108097A (en) * | 2021-04-06 | 2021-07-13 | 西安航天动力研究所 | Differential double-valve-core valve structure |
| CN113431710A (en) * | 2021-05-19 | 2021-09-24 | 蓝箭航天技术有限公司 | Reversing valve of liquid rocket engine and liquid rocket engine |
| CN115234705A (en) * | 2022-09-22 | 2022-10-25 | 西安热工研究院有限公司 | Throttle valve with good vibration resistance |
| CN116045047A (en) * | 2023-03-31 | 2023-05-02 | 江苏深蓝航天有限公司 | Safety valve and rocket storage tank |
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2020
- 2020-08-25 CN CN202010864368.8A patent/CN111828685A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108097A (en) * | 2021-04-06 | 2021-07-13 | 西安航天动力研究所 | Differential double-valve-core valve structure |
| CN113431710A (en) * | 2021-05-19 | 2021-09-24 | 蓝箭航天技术有限公司 | Reversing valve of liquid rocket engine and liquid rocket engine |
| CN115234705A (en) * | 2022-09-22 | 2022-10-25 | 西安热工研究院有限公司 | Throttle valve with good vibration resistance |
| CN116045047A (en) * | 2023-03-31 | 2023-05-02 | 江苏深蓝航天有限公司 | Safety valve and rocket storage tank |
| CN116045047B (en) * | 2023-03-31 | 2023-07-21 | 江苏深蓝航天有限公司 | Safety valve and rocket storage tank |
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