CN208982710U - One kind is from pressure release type check-valves - Google Patents

Abstract

The utility model discloses one kind from pressure release type check-valves, it is related to a kind of check-valves, including non-return valve body, intake antrum is provided in non-return valve body, water chamber, it is connected to the first passage of intake antrum and water chamber and the non-return structure for separating and opening first passage, it further include the connectivity structure for being connected to intake antrum and water chamber, the partition-type structures that medium circulates in it can be separated and open by being also equipped on connectivity structure, the control terminal of partition-type structures is connected with the adjustable pressure control structure that can control it to unlatch and close, circulation medium is flowed via a conduit to apply pressure inside adjustable pressure control structure and control it and be unlatched and closed in water chamber, when circulation medium pressure reaches setting value, adjustable pressure control structure opens and controls partition-type structures by output end and opens；The utility model realizes the controllable purpose of the releasing pressure automatically of equipment, pressure release starting pressure adjustable, pressure release effect, avoids the drawbacks of traditional equipment can not be adjusted.

Description

One kind is from pressure release type check-valves

Technical field

The utility model relates to a kind of check-valves, more particularly to it is a kind of being capable of check-valves adjustable, from pressure release.

Background technique

Check-valves refers to opening and closing element for round flap and by own wt and pressure medium generation movement to block medium to fall A kind of valve of stream.Belong to automatic valve class, also known as non-return valve, check valve, return valve or isolating valve.Flap motion mode is divided into lifting Formula and swing type.Lift check valve is similar with stop valve structure, only lacks the valve rod for driving flap.Medium from input end (under Side) it flows into, it is flowed out from outlet end (upside).When inlet pressure is greater than the sum of flap weight and its flow resistance, valve is opened It opens.Conversely, valve is then closed when medium is flow backwards.Swing check valve has a flap that is tilting and being pivoted, and work is former It manages similar to lift check valve.Check-valves is commonly used for the bottom valve of water plug, can prevent the reflux of water.Only consolidate valve and cut-off Valve is applied in combination, and can play the role of security isolation.

Existing check-valves is there is no from decompression function, and when ducts upstream pump stops working, main valve upstream pressure disappears, Flap is bonded under the action of downstream pressure with valve seat, forms sealing, but when pipeline is because of cause specific (such as temperature elevating medium Volume expansion or medium is unstable situations such as gas generation) when will lead to shut-off valve water outlet end pressure it is excessive, easily cause Shut-off valve and the junction of water outlet connecting pipe are damaged, and the safe handling of equipment is unfavorable for.

Part has the check-valves of decompression function, and there is no self-relieving functions, but needs are manually opened, lead to work When making low efficiency, and being difficult to timely pressure release, the risk of equipment damage is still difficult to avoid that；Small part has self-relieving non-return Valve, pressure release principle are then by the way of the two-way installation of primary and secondary check-valves, however the check-valves of this mode will lead to Medium back flow amount is excessive, and pressure release effect is uncontrollable, is away from each other with check-valves initial designs purpose, effect is poor；Most equipment Vent pressure is fixed value, non-adjustable, can not adapt to various working environments.

Therefore, how to solve the defect of the prior art is technical problem urgently to be solved.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, one kind is provided from pressure release type check-valves, to solve Check-valves can not releasing pressure automatically, the technical problems such as pressure release is uncontrollable, vent pressure is non-adjustable in the prior art.

The utility model provides a kind of setting from pressure release type check-valves, including non-return valve body, the non-return valve body There are the first passage of intake antrum, water chamber, connection intake antrum and water chamber and the non-return knot for separating and opening first passage Structure further includes the connectivity structure for being connected to the intake antrum and the water chamber, be also equipped on the connectivity structure can separate and Open the partition-type structures that circulate in it of medium, the control terminal of the partition-type structures be connected with can control it to unlatch and close can The input terminal of mode pressure control structure, the adjustable pressure control structure is connect by conduit with water chamber, in water chamber Circulation medium is flowed via a conduit to apply pressure inside adjustable pressure control structure and control it and be unlatched and closed, and works as circulation medium When pressure reaches setting value adjustable pressure control structure open and by output end control partition-type structures open, circulation medium by Water chamber flows into intake antrum through connectivity structure, and partition-type structures are in normally off when circulation medium pressure is not up to setting value, can The starting pressure of mode pressure control structure is arranged by regulating device.

Further, the regulating device is specially adjustment axis, the adjustable pressure control structure specifically by first shell, Second shell, flexible sheet, spring, adjustment axis, output shaft are constituted, and the first shell and the second shell are that one end is opened The open end of the hollow cavity structure of mouth, the open end of the first shell and the second shell is bolted to form one A integral cavity structure, and be folded with flexible sheet therebetween, the flexible sheet is by the inner cavity of the integral cavity structure It is divided into the first cavity close to first shell and the second cavity close to second shell, is provided in first cavity described Spring, the spring are connected with one end of the adjustment axis on one end far from the second shell, the adjustment axis it is another On the outside across first shell setting, the spring is tight close to one end of the flexible sheet and the flexible sheet at end Contiguity touch simultaneously connect with one end of the output shaft, the other end of the output shaft sequentially pass through flexible sheet, the second cavity and Second shell is arranged in the outside of the second shell and connect with the control terminal of partition-type structures, the output shaft and film contact Portion and dividing equally with second shell contact portion seals, and second cavity is connected with one end of the conduit.

Further, the adjustment axis is connect by adjustment disk with the spring, and the two is fixedly connected, and the adjustment axis is set It sets and adjusting knob is installed on one end on the outside of the first shell, and the adjustment axis and the first shell screw thread connect It connects.

Further, the mode that is fixedly connected of the adjustment axis and the adjustment disk is changed to the adjustment disk and is set in institute It states in adjustment axis and the two is threadedly coupled, the connection type that the adjustment axis is threadedly coupled with the first shell is changed to turn Dynamic connection.

Further, the spring is connected to the output shaft by baffle, and the output shaft is specially that the thick one end in one end is thin Cylindrical structure, thinner one end is provided with screw thread, is arranged with sealing element thereon, and the end sequentially passes through flexible sheet and gear Plate is threadedly coupled with fastening nut, and sealing element is arranged in the second cavity and is in close contact with the flexible sheet.

Further, the partition-type structures are specifically made of third shell, partition core and control shaft, the third shell installation On the connectivity structure, the partition core is arranged in the inner cavity of the third shell, it is described partition core one end with it is described Axis connection is controlled, stroke groove is offered in the third shell, the partition core and the control shaft are arranged in the stroke groove Interior and can move reciprocatingly in it, the control shaft drives it to move reciprocatingly and can separate and open medium in the process It is connected to the output shaft in one end of the intracorporal circulation of third shell, the control shaft across the third shell and the two is coaxial Distribution.

Further, the third shell is structure as a whole with the non-return valve body, and the connectivity structure is specially to be connected to The second channel of the intake antrum and the water chamber, and the second channel passes through the third shell, the partition core is set Set in the second channel in the third housing cavity and separate the second channel, the stroke groove with it is described Space connection outside third shell, the outer wall and the stroke groove inner wall of the second shell end being connected to the output shaft It is threadedly coupled.

Further, sealing ring, and the outer wall of the sealing ring are arranged in the control shaft in the stroke groove It is closely connect with the inner wall of the stroke groove.

Further, it is specifically made of third channel and fourth lane in the intracorporal second channel of the third shell, One end of the third channel is connected to the intake antrum, and the other end is connected to the fourth lane, the fourth lane One end is connected to the water chamber, the junction of partition core the partition third channel and fourth lane, and the partition core Set up separately and set in the third channel, remainder is arranged in fourth lane, and the fourth lane can accommodate the partition core Entirety simultaneously drives the partition core to move reciprocatingly in it for the control shaft, and the partition core is far from the third channel One end be connected with the control shaft, when the partition core separates third channel and when fourth lane junction, control shaft is in Part in fourth lane can not separate fourth lane.

Further, the conduit is specially the pressure guiding pipe being made of stainless steel.

The utility model has the following beneficial effects:

It is provided by the utility model a kind of from pressure release type check-valves, by adjustable pressure control structure by conduit with After the connection of non-return valve body water chamber, determine whether to reach setting pressure according to the pressure medium at non-return valve body water chamber Value, control partition-type structures are opened after its automatic opening when reaching setup pressure value, and circulation medium can be by water chamber through connectivity structure Intake antrum is flowed into, the purpose from pressure release has been achieved, and partition-type structures are closed when pressure medium is less than setting value in water chamber The drawbacks of closing, no longer pressure release, and then realizing the controllable purpose of pressure release effect, avoid conventional check valves；By will be adjustable Pressure control structure is set as the device being made of structures such as first shell, second shell, springs, third shell in partition-type structures The setting that is structure as a whole with non-return valve body, connectivity structure are set as open up in third shell and non-return valve body second Channel, significantly reduces the manufacturing cost of equipment, and by adjusting adjustment axis adjustable springs to the pressure of flexible sheet, into And the cracking pressure of partition core can be effectively adjusted, when being discharged cavity pressure and being transferred in the second cavity through conduit to flexible sheet Pressure, when pressure medium is greater than pressure of the spring to flexible sheet, compressed spring separates core movement to drive through output shaft, Second channel is opened, flow of media realizes the purpose from pressure release；Likewise, pressure medium reduce when, spring reset, push every Disconnected core separates second channel, realizes the controllable purpose of pressure release effect, by the setting of adjustment axis, the pressure adjustable of spring is in turn Realize the purpose of opening of device pressure adjustable.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram from pressure release type check-valves in embodiment one；

Fig. 2 is a kind of structural schematic diagram from pressure release type check-valves in embodiment two.

In figure: non-return valve body；2, intake antrum；3, water chamber；4, first passage；5, non-return structure；6, connectivity structure；7, Partition-type structures；8, adjustable pressure control structure；9, conduit；10, first shell；11, second shell；12, flexible sheet；13, Spring；14, adjustment axis；15, output shaft；16, bolt；17, adjustment disk；18, adjusting knob；19, sealing element；20, fastening nut； 21, third shell；22, separate core；23, control shaft；24, stroke groove；25, sealing ring；26, third channel；27, fourth lane； 28, baffle.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Embodiment one

Referring to Fig. 1, the present embodiment provides one kind from pressure release type check-valves, including non-return valve body 1, non-return valve body 1 It is inside provided with the first passage 4 of intake antrum 2, water chamber 3, connection intake antrum 2 and water chamber 3 and leads to for separating and opening first The non-return structure 5 in road 4, further includes the connectivity structure 6 for being connected to intake antrum 2 and water chamber 3, and connectivity structure 6 is only required to reach It is connected to the purpose of intake antrum 2 and water chamber 3, the outside that may be provided at non-return valve body 1 can also be on non-return valve body 1 It opens up；

The partition-type structures 7 that medium circulates in it can be separated and open by being also equipped on connectivity structure 6, partition-type structures 7 It is required to achieve the purpose that separate connectivity structure 6, partition-type structures 7 can be mechanical structure (such as iris type valve or company Rod-type valve etc.) it can also only need to meet adjustable pressure with control electronics (such as solenoid valve), the type selecting of partition-type structures 7 Control structure 8 can controller unlatch and close；

The control terminal of partition-type structures 7 is connected with the adjustable pressure control structure 8 that can control it to unlatch and close, adjustable The input terminal of pressure control structure 8 is connect by conduit 9 with water chamber 3, and adjustable pressure control structure 8 can be mechanical equipment It can also only need to reach to judge whether to reach according to the pressure medium inputted in conduit 9 in it for electronic operating device etc. to set Then definite value controls unlatching and closing for partition-type structures 7 according to judging result output action；

Circulation medium flows into application pressure inside adjustable pressure control structure 8 by conduit 9 and controls it i.e. in water chamber 3 It unlatches and closes, when circulation medium pressure reaches setting value, adjustable pressure control structure 8 is opened and controlled by output end Partition-type structures 7 are opened, and circulation medium flows into intake antrum 2 through connectivity structure 6 by water chamber 3, and circulation medium pressure is not up to set Partition-type structures 7 are in normally off when value；

The starting pressure of adjustable pressure control structure 8 is arranged by regulating device.

Connectivity structure 6 is specially the pipeline that 1 outside of non-return valve body is arranged in the present embodiment, and partition-type structures 7 are specific For solenoid valve, hydraulic pressure sensor (this that the pressure medium entered in adjustable pressure control structure 8 through conduit 9 is arranged inside In embodiment select model ELE801 hydraulic pressure sensor) detection after, the microcontroller to set within it (selects in the present embodiment With the programmable controller of model FX3U-16MR/ES-A) judge whether pressure medium reaches setting value, when reaching setting value It controls solenoid valve to open, and can adjust the cracking pressure value of solenoid valve by setting microcontroller, realize releasing pressure automatically, pressure release Effect is controllable and can effectively adjust the purpose of pressure release condition.

Embodiment two

Equipment manufacturing costs in embodiment one are higher, therefore in order to reduce the manufacturing cost of equipment, and set to realize Standby stable operation (equipment when containing electronic equipment easily damage, and be highly prone to external power supply etc. influence), therefore, this reality Applying example is to be improved equipment.

Example regulating device is specially adjustment axis 14 in this embodiment, and adjustable pressure control structure 8 is specifically by first shell 10, second shell 11, flexible sheet 12, spring 13, adjustment axis 14, output shaft 15 are constituted, first shell 10 and second shell 11 It is hollow cavity structure open at one end, the open end of first shell 10 and the open end of second shell 11 are connected by bolt 16 It connects to form an integral cavity structure, and is folded with flexible sheet 12 therebetween, flexible sheet 12 is by integral cavity structure Inner cavity is divided into the first cavity close to first shell 10 and the second cavity close to second shell 11, and flexible sheet 12 can have The junction of the sealing of effect ground first shell 10 and second shell 11；

Spring 13 is provided in first cavity, spring 13 is connected with the one of adjustment axis 14 on one end far from second shell 11 End, the other end of adjustment axis 14 pass through first shell 10 and are arranged on the outside, the one end and bullet of spring 13 close to flexible sheet 12 Property diaphragm 12 be in close contact and connect with one end of output shaft 15, the other end of output shaft 15 sequentially passes through flexible sheet 12, the Two cavitys and second shell 11 are arranged in the outside of second shell 11 and connect with the control terminal of partition-type structures 7, output shaft 15 with Film contact portion and dividing equally with 11 contact portion of second shell seals, and the second cavity is connected with one end of conduit 9；

Further, for the size for the pressure that effectively adjustment spring 13 generates flexible sheet 12, adjustment axis 14 is logical It overregulates disk 17 to connect with spring 13, and the two is fixedly connected, adjustment axis 14 is arranged on the one end in 10 outside of first shell and pacifies Equipped with adjusting knob 18, and adjustment axis 14 is threadedly coupled with first shell 10；

By above-mentioned setting, adjustment axis 14 can be driven to rotate by rotating adjusting knob 18, and itself and 10 spiral shell of first shell Line connection, and then adjustment axis 14 can be threaded in or out first shell 10, can pass through 17 compressed spring 13 of adjustment disk when screwing in；When The pressure to spring 13 can be reduced when back-out by adjustment disk 17；

Further, the connection type of spring 13 and adjustment disk 17 can also be set in adjustment axis 14 and two for adjustment disk 17 Person is threadedly coupled, while adjustment axis 14 and first shell 10 are rotation connection；

By above-mentioned setting, when by rotation adjusting knob 18, adjustment axis 14 and adjustment disk 17 generate relative motion, in turn It can opposite compression or mode spring 13；

The mode for selecting adjustment axis 14 to be threadedly coupled with first shell 10 in the present embodiment is as the two connection relationship；

Further, in order to expand the forced area of flexible sheet 12, spring 13 is connect by baffle 28 with output shaft 15, Output shaft 15 is specially the thin cylindrical structure in the thick one end in one end, and thinner one end is provided with screw thread, is arranged with sealing element thereon 19, and the end sequentially passes through flexible sheet 12 and baffle 28 is threadedly coupled with fastening nut 20, and sealing element 19 and flexible sheet 12 are in close contact；

Effectively sealing element 19 and flexible sheet 12 can be mutually compressed when fastening fastening nut 20 in this way, realized effective Sealing avoids and enters in the first cavity in the intracorporal medium of the second chamber；

Further, in the present embodiment, partition-type structures 7 are specifically by third shell 21, partition core 22 and 23 structure of control shaft At, third shell 21 is mounted on connectivity structure 6, and partition core 22 is arranged in the inner cavity of third shell 21, and the one of partition core 22 End is connect with control shaft 23, and stroke groove 24 is offered in third shell 21, separates core 22 and control shaft 23 is arranged in stroke groove 24 Interior and can move reciprocatingly in it, control shaft 23 drives it to move reciprocatingly and can separate in the process and open medium to exist One end of circulation in third shell 21, control shaft 23 is connect across third shell 21 with output shaft 15 and the two is coaxially distributed.

Further, in order to be effectively reduced the manufacture difficulty of equipment and improve the intensity of equipment, in the present embodiment the Three shells 21 are structure as a whole with non-return valve body 1, and connectivity structure 6 is specially to be connected to the second of intake antrum 2 and water chamber 3 to lead to Road, and second channel passes through third shell 21, partition core 22 is set in the second channel in 21 inner cavity of third shell simultaneously Separate second channel, stroke groove 24 is connected to the space outside third shell 21,11 end of second shell connecting with output shaft 15 Outer wall connect with 24 inner thread of stroke groove.

Further, in the present embodiment, the control shaft in order to effectively seal against partition-type structures 7, in stroke groove 24 Sealing ring 25 is arranged on 23, and the outer wall of sealing ring 25 is closely connect with the inner wall of stroke groove 24；

Further, in order to effectively separate connectivity structure 6, in the present embodiment, second in third shell 21 Channel is specifically made of third channel 26 and fourth lane 27, and one end of third channel 26 is connected to intake antrum 2, the other end with Fourth lane 27 is connected to, and one end of fourth lane 27 is connected to water chamber 3, and partition core 22 separates third channel 26 and fourth lane 27 junction, and separate 22 part of core and be arranged in third channel 26, remainder is arranged in fourth lane 27, four-way Road 27 can accommodate 22 entirety of partition core and drive partition core 22 to move reciprocatingly in it for control shaft 23, and partition core 22 is separate One end of third channel 26 is connected with control shaft 23；

It can effectively be increased by the active strokes that above-mentioned setting separates core 22, be convenient for pressure release；

Further, separate third channel 26 and when 27 junction of fourth lane when separating core 22, control shaft 23 is in the Part in four-way 27 can not separate fourth lane 27；

It can be full of fourth lane 27 by above-mentioned setting circulation medium, and then can effectively balance circulation in fourth lane and be situated between Matter acts on the power on partition core 22；

Further, conduit 9 is specially the pressure guiding pipe being made of stainless steel.

Working principle: by equipment integral installation when on external pipe, intake antrum 2 is connect with the input terminal of external pipe, Circulation medium enters water chamber 3 through first passage after intake antrum 2 enters in non-return valve body 1, and non-return structure 5 can be effectively prevent Medium back flow, when causing the pressure of water chamber 3 to be greater than the pressure of intake antrum 2 because of heating or the reasons such as medium is unstable, circulation Medium enters in adjustable pressure control structure 8 through conduit 9, enters in the second cavity in the present embodiment, and medium is full of second After cavity, press to flexible sheet 12, when pressure medium is greater than the pressure that spring 13 presses to flexible sheet 12 through baffle 28, Medium pushes baffle 28 to carry out compressed spring 13 through flexible sheet 12, and then drives control shaft 23 towards spring 13 through output shaft 15 Movement, after driving partition core 22 to move, second channel connection, medium enters intake antrum 2 through second channel by water chamber 3, reaches The purpose of pressure release.

When needing to set pressure release starting pressure, adjustment axis 14 is made to be threaded in or out first by rotation of adjustment knob 18 Shell 10, can be by 17 compressed spring 13 of adjustment disk when screwing in, and then improves the starting pressure of equipment；It can pass through when screwing out Adjustment disk 17 reduces the pressure to spring 13, and then reduces the starting pressure of equipment, improves the adaptation range of equipment.

Claims (10)

1. a kind of be provided with intake antrum from pressure release type check-valves, including non-return valve body (1), the non-return valve body (1) (2), water chamber (3), connection intake antrum (2) and water chamber (3) first passage (4) and for separating and opening first passage (4) non-return structure (5), which is characterized in that further include the connectivity structure for being connected to the intake antrum (2) and the water chamber (3) (6), the partition-type structures (7) that can separate and open medium and circulate in it, the partition are also equipped on the connectivity structure (6) The control terminal of structure (7) is connected with the adjustable pressure control structure (8) that can control it to unlatch and close, the adjustable pressure The input terminal of control structure (8) is connect by conduit (9) with water chamber (3), and water chamber (3) interior circulation medium passes through conduit (9) Application pressure controls it and unlatches and closes inside inflow adjustable pressure control structure (8), when circulation medium pressure reaches setting Adjustable pressure control structure (8) is opened and is opened by output end control partition-type structures (7) when value, and circulation medium is by water chamber (3) intake antrum (2) are flowed into through connectivity structure (6), partition-type structures (7) are in normally closed shape when circulation medium pressure is not up to setting value The starting pressure of state, adjustable pressure control structure (8) is arranged by regulating device.

2. according to claim 1 a kind of from pressure release type check-valves, which is characterized in that the regulating device is specially to adjust Axis (14), the adjustable pressure control structure (8) specifically by first shell (10), second shell (11), flexible sheet (12), Spring (13), adjustment axis (14), output shaft (15) are constituted, and the first shell (10) and the second shell (11) are one end The hollow cavity structure of opening, the open end of the first shell (10) and the open end of the second shell (11) pass through bolt (16) it is connected to form a whole cavity structure, and is folded with flexible sheet (12) therebetween, the flexible sheet (12) will The inner cavity of the integral cavity structure is divided into the first cavity close to first shell (10) and the close to second shell (11) Two cavitys are provided with the spring (13) in first cavity, the spring (13) far from the second shell (11) one One end of the adjustment axis (14) is connected on end, the other end of the adjustment axis (14) is arranged across the first shell (10) On the outside, the spring (13) close to the flexible sheet (12) one end and the flexible sheet (12) be in close contact and with One end of the output shaft (15) connects, and the other end of the output shaft (15) sequentially passes through flexible sheet (12), the second cavity It is connect in the outside of the second shell (11) and with the control terminal of partition-type structures (7) with second shell (11) setting, it is described defeated Shaft (15) divides equally sealing with film contact portion and with second shell (11) contact portion, and second cavity is connected with described lead Manage the one end of (9).

3. according to claim 2 a kind of from pressure release type check-valves, which is characterized in that the adjustment axis (14) passes through adjusting Disk (17) is connect with the spring (13), and the two is fixedly connected, and the adjustment axis (14) is arranged in the first shell (10) It is equipped on the one end in outside adjusting knob (18), and the adjustment axis (14) is threadedly coupled with the first shell (10).

4. according to claim 3 a kind of from pressure release type check-valves, which is characterized in that by the adjustment axis (14) with it is described The mode that is fixedly connected of adjustment disk (17) is changed to the adjustment disk (17) and is set on the adjustment axis (14) and the two screw thread Connection, the connection type that the adjustment axis (14) is threadedly coupled with the first shell (10) is changed to be rotatablely connected.

5. any described a kind of from pressure release type check-valves according to claim 3 or 4, which is characterized in that the spring (13) is logical Baffle (28) to be crossed to connect with the output shaft (15), the output shaft (15) is specially the thin cylindrical structure in the thick one end in one end, Thinner one end is provided with screw thread, is arranged with thereon sealing element (19), and the end sequentially passes through flexible sheet (12) and baffle (28) it is threadedly coupled with fastening nut (20), sealing element (19) setting is in the second cavity and close with the flexible sheet (12) Contact.

6. according to claim 5 a kind of from pressure release type check-valves, which is characterized in that the partition-type structures (7) specifically by Third shell (21), partition core (22) and control shaft (23) are constituted, and the third shell (21) is mounted on the connectivity structure (6) On, partition core (22) is arranged in the inner cavity of the third shell (21), one end of partition core (22) and the control Axis (23) connection processed, the third shell (21) is interior to be offered stroke groove (24), the partition core (22) and the control shaft (23) setting can move reciprocatingly in the stroke groove (24) and in it, and the control shaft (23) drives it to move reciprocatingly And can separate and open circulation of the medium in third shell (21) in the process, one end of the control shaft (23) passes through institute State that third shell (21) is connect with the output shaft (15) and the two is coaxially distributed.

7. according to claim 6 a kind of from pressure release type check-valves, which is characterized in that the third shell (21) with it is described Non-return valve body (1) is structure as a whole, and the connectivity structure (6) is specially to be connected to the intake antrum (2) and the water chamber (3) Second channel, and the second channel passes through the third shell (21), and the partition core (22) is set at described the In the second channel in three shells (21) inner cavity and separate the second channel, the stroke groove (24) and the third shell The space connection of body (21) outside, the outer wall and the stroke of the second shell (11) end being connect with the output shaft (15) The connection of slot (24) inner thread.

8. according to claim 7 a kind of from pressure release type check-valves, which is characterized in that in the stroke groove (24) It is arranged with sealing ring (25) on the control shaft (23), and the inner wall of the outer wall of the sealing ring (25) and the stroke groove (24) Close connection.

9. according to claim 8 a kind of from pressure release type check-valves, which is characterized in that in the third shell (21) The second channel be specifically made of third channel (26) and fourth lane (27), one end of the third channel (26) and institute State intake antrum (2) connection, the other end be connected to the fourth lane (27), one end of the fourth lane (27) with it is described out Water cavity (3) connection, the junction of partition core (22) partition third channel (26) and fourth lane (27), and the partition core (22) part setting is in the third channel (26), and remainder setting is in fourth lane (27), the fourth lane (27) partition core (22) entirety can be accommodated and done in it for the control shaft (23) drive partition core (22) past Multiple movement, partition core (22) are connected with the control shaft (23) far from the one end of the third channel (26), when it is described every When disconnected core (22) partition third channel (26) and fourth lane (27) junction, control shaft (23) is in fourth lane (27) Part can not separate fourth lane (27).

10. according to claim 9 a kind of from pressure release type check-valves, which is characterized in that the conduit (9) is specially by not Become rusty pressure guiding pipe made of steel.