CN111006043A - Power-assisted return seat type check valve - Google Patents

Power-assisted return seat type check valve Download PDF

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Publication number
CN111006043A
CN111006043A CN201911225145.0A CN201911225145A CN111006043A CN 111006043 A CN111006043 A CN 111006043A CN 201911225145 A CN201911225145 A CN 201911225145A CN 111006043 A CN111006043 A CN 111006043A
Authority
CN
China
Prior art keywords
valve
sealing surface
check valve
seat
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911225145.0A
Other languages
Chinese (zh)
Inventor
张世军
赵亮
欧阳中华
胡友情
赵文奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Original Assignee
China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China General Nuclear Power Corp, China Nuclear Power Engineering Co Ltd, CGN Power Co Ltd, Shenzhen China Guangdong Nuclear Engineering Design Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN201911225145.0A priority Critical patent/CN111006043A/en
Publication of CN111006043A publication Critical patent/CN111006043A/en
Pending legal-status Critical Current

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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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

The invention discloses a power-assisted back-seat check valve which comprises a valve seat and a valve clack capable of moving relative to the valve seat to open and close a medium flow channel, wherein the valve seat is provided with a valve seat sealing surface, a sucker electromagnet is arranged on the valve seat sealing surface, and the sucker electromagnet is electrified to generate electromagnetic force when the valve clack is close to the valve seat sealing surface so as to enable the valve clack to be adsorbed on the valve seat sealing surface in a sealing manner. Compared with the prior art, the power-assisted return seat type check valve has the following advantages: when the medium has small flow velocity and even flows in the opposite direction, the valve clack can be quickly closed within a set distance (or angle) with the sealing surface of the valve seat, and the valve clack and the sealing surface of the valve seat can still be well sealed when the pressure difference between the front and the back of the valve is small, so that the leakage is avoided, and the reliability of the equipment is greatly improved. In addition, the normal flow of the medium is not affected in any negative way, and the pressure loss is not increased.

Description

Power-assisted return seat type check valve
Technical Field
The present invention relates to fluid process piping systems, and more particularly, to a power-assisted back-seating check valve.
Background
The check valve is a valve in which the opening and closing piece mainly acts by self gravity and medium pressure to block the backflow of the medium, and belongs to the automatic valve class. The check valve only allows medium to flow in one direction and prevents medium from flowing in the opposite direction, and mainly has the functions of preventing medium backflow, preventing reverse rotation of the pump and the driving motor, discharging container medium and the like. The check valve is self-operating: under the action of fluid pressure flowing in one direction, the valve clack is opened; when the fluid flows in the opposite direction, the closing valve flap acts on the valve seat by the fluid pressure and the self-weight of the valve flap, thereby shutting off the flow.
The check valve is divided into a lifting type and a swing type according to the motion mode of the valve clack. The swing check valve is provided with a hinge mechanism and a door-like flap that rests freely against the inclined valve seat surface. In order to ensure that the valve flap reaches the appropriate position of the valve seat surface each time, the valve flap is designed with a hinge mechanism so that the valve flap has sufficient pivoting space and is in true, full-face contact with the valve seat. The swing check valve is in a fully open condition, with little obstruction to fluid pressure, and therefore a relatively small pressure drop across the valve.
The lifting check valve is similar to the stop valve in structure, and is not provided with a valve rod for driving the valve clack. The medium flows in from the lower inlet end and the upper side flows out from the outlet end. The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. The valve flap of the lift check valve sits on the valve seat sealing surface on the valve body, except that the valve flap can freely lift, the rest of the valve flap is the same as the stop valve, the fluid pressure lifts the valve flap from the valve seat sealing surface, and the medium backflow causes the valve flap to fall back on the valve seat and cut off the flow. Like a check valve, the passage of fluid through the lift check valve is also narrow, so that the pressure drop through the lift check valve is greater than that of the swing check valve, and the flow rate of the swing check valve is less restricted.
However, the main drawbacks of the return seat type check valves of the prior art are: however, when the pressure difference is small, the valve flap is not closed tightly, and the valve may leak and flow backwards. In view of the above, it is necessary to provide a reliable sealing check valve of the power-assisted return seat type.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, and the power-assisted return seat type check valve reliable in sealing is provided.
In order to achieve the above object, the present invention provides a power-assisted back-seating type check valve, which includes a valve seat and a valve flap movable relative to the valve seat to open and close a medium flow passage, wherein the valve seat is provided with a valve seat sealing surface, a suction cup electromagnet is provided on the valve seat sealing surface, and when the valve flap approaches the valve seat sealing surface, the suction cup electromagnet is energized to generate an electromagnetic force, so that the valve flap is sealingly attracted to the valve seat sealing surface.
As an improvement of the power-assisted recoating check valve of the present invention, the power-assisted recoating check valve is a lift check valve, the valve flap moves up and down relative to the valve seat sealing surface, and when the distance between the valve flap and the valve seat sealing surface is less than or equal to a set value, the suction cup electromagnet is energized to generate electromagnetic force, so that the valve flap is sealingly adsorbed on the valve seat sealing surface.
As an improvement of the power-assisted recoating check valve, when the distance between the valve clack and the sealing surface of the valve seat is less than or equal to 1-5 mm, the electromagnet of the sucking disc is electrified.
As an improvement of the power-assisted return-seat type check valve, when the valve clack is subjected to positive through-flow pressure which is greater than or equal to a fixed value pressure, the electromagnet of the sucking disc is powered off.
As an improvement of the power-assisted return-seat type check valve of the present invention, the valve flap is made of carbon steel or stainless steel material.
As an improvement of the power-assisted recoil check valve, the power-assisted recoil check valve is a swing check valve, and when the angle between the valve flap and the valve seat sealing surface is smaller than or equal to a set value, the suction cup electromagnet is electrified to generate electromagnetic force, so that the valve flap is sealed and adsorbed on the valve seat sealing surface.
As an improvement of the power-assisted recoating check valve, when the angle between the valve clack and the sealing surface of the valve seat is less than or equal to 1-3 degrees, the electromagnet of the sucking disc is electrified.
As an improvement of the power-assisted return-seat type check valve, when the valve clack is subjected to positive through-flow pressure which is greater than or equal to a fixed value pressure, the electromagnet of the sucking disc is powered off.
As an improvement of the power-assisted return-seat type check valve of the present invention, the valve flap is made of carbon steel or stainless steel material.
As an improvement of the power-assisted recoating check valve, when the forward through-flow pressure borne by the valve clack is greater than or equal to a set value, the electromagnet of the sucker is powered off, the electromagnetic force disappears, and the recoating check valve opens normal through-flow.
As an improvement of the power-assisted return seat type check valve, the sucker electromagnet is arranged into a ring disk shape or an arc disk shape divided into a plurality of sections and attached to the sealing surface of the valve seat, the electromagnet is magnetized when being electrified, no remanence exists when the electromagnet is powered off, and the disk surface is subjected to waterproof and antiseptic treatment.
Compared with the prior art, the power-assisted return seat type check valve has the following advantages:
firstly, when the medium has small flow velocity and even flows in the opposite direction, the valve clack can be quickly closed within a set distance (or angle) with a valve seat sealing surface, and the valve can still ensure good sealing between the valve clack and the valve seat sealing surface when the pressure difference between the front and the back of the valve is small, thereby avoiding leakage and greatly improving the reliability of equipment;
secondly, the power-assisted return seat type check valve does not have any negative influence on the normal flow of a medium, and the pressure loss cannot be increased.
Drawings
The present invention will be described in detail with reference to the drawings and the detailed description, wherein:
fig. 1 is a schematic view of the construction of one embodiment of the power-assisted recoil check valve of the present invention.
Fig. 2 is a schematic view of another embodiment of a power-assisted back-seating check valve of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the present invention provides a power-assisted recoating check valve, which includes a valve seat 10 and a valve flap 20 movable relative to the valve seat 10 to open and close a medium flow passage, wherein the valve seat 10 is provided with a valve seat sealing surface 100, the valve seat sealing surface 100 is provided with a suction cup electromagnet (not shown), and when the valve flap 20 approaches the valve seat sealing surface 100, the suction cup electromagnet is energized to sealingly adhere the valve flap 20 to the valve seat sealing surface 100.
FIG. 1 shows a lift check valve in which a valve flap 20 made of carbon steel or stainless steel moves up and down with respect to a sealing surface 100 of a valve seat 10, and when a distance between the valve flap 20 and the sealing surface 100 of the valve seat is equal to or less than a predetermined value, a suction cup electromagnet is energized to generate an electromagnetic force FnThe valve clack 20 is adsorbed on the valve seat sealing surface 100 in a sealing mode, the sealing force is increased, and the situation that a medium is not poured due to leakage is guaranteedAnd (4) streaming. When the valve clack 20 is subjected to the positive through-flow pressure which is greater than or equal to the fixed value pressure, the electromagnet of the suction cup is powered off. For example, when the distance between the valve flap 20 and the valve seat sealing surface 100 is 1mm to 5mm or less, the suction cup electromagnet is energized.
When the check valve is transited from the open normal through-flow state to the closed state, the check valve has
When a is more than n, electromagnetic force Fe0; (a is the distance between the valve flap 20 and the valve seat sealing surface 100)
When a is less than or equal to n, Fe＝FnF, in the case that the structure and material of the electromagnet of the sucking disc are determinednIs a single valued function of the energizing current. Constant value F of electromagnetic forcenAny value (or other value deemed appropriate by the user) from 0 to the range of pressure values generated by the flap 20 for normal flow of the medium may be set according to the needs of the user system. The position setting n of the flap 20 can be set to any value between 0 and the normal flow-through position of the valve, depending on the system requirements of the user.
For a closed check valve, the valve flap 20 is subjected to a positive throughflow pressure FlGreater than or equal to a certain value FmTime-out of power, electromagnetic force FeAnd when the flow disappears, the valve is opened to be in normal through flow. That is, when the check valve transits from the closed state to the normal flow-passing state, there are
Fl＜FmWhen F is presente＝FnWhen the valve is closed;
Fl≥Fmwhen F is presenteWhen 0, the valve is open. Constant value F of medium positive through-flow pressuremGenerally set equal to a constant value F of the electromagnetic forcenOther values may be set as deemed appropriate by the user.
FIG. 2 shows a swing check valve in which a valve flap 20 is rotatable with respect to a sealing surface 100 of a valve seat 10, and when an angle between the valve flap 20 and the sealing surface 100 is equal to or smaller than a predetermined value, an electromagnet of a suction cup is energized to generate an electromagnetic force FnThe valve flap 20 is sealingly attached to the valve seat sealing surface 100. For example, when the angle between the valve flap 20 and the valve seat sealing surface 100 is 1 ° to 3 °, the suction cup electromagnet is energized. When the valve clack 20 is subjected to positive through-flow pressure which is greater than or equal to a fixed valueWhen the pressure is applied, the electromagnet of the sucker is powered off. In the illustrated embodiment, the valve flap 20 is made of a carbon steel or stainless steel material.
It should be noted that, the structure of the valve seat sealing surface 100 of the valve flap 20 and the valve seat 10 is modified only to increase the adsorption force, and other structures of the power-assisted back-seat type check valve are substantially the same as those of the power-assisted back-seat type check valve in the prior art, and are not described again.
As can be seen from the above detailed description of the embodiments of the present invention, the power-assisted return-seat type check valve of the present invention has the following advantages over the prior art:
firstly, when the medium flow rate is small and even flows in the opposite direction, the valve clack 20 can be quickly closed within a set value distance (or angle) from the valve seat sealing surface 100, and the good sealing between the valve clack 20 and the valve seat sealing surface 100 can be still ensured when the pressure difference between the front and the back of the valve is small, so that the leakage is avoided, and the reliability of the equipment is greatly improved;
secondly, the power-assisted return seat type check valve does not have any negative influence on the normal flow of a medium, and the pressure loss cannot be increased.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (11)

1. A power-assisted back-seating check valve comprises a valve seat and a valve clack capable of moving relative to the valve seat to open and close a medium flow channel, and is characterized in that the valve seat is provided with a valve seat sealing surface, a sucker electromagnet is arranged on the valve seat sealing surface, and when the valve clack is close to the valve seat sealing surface, the sucker electromagnet is electrified to generate electromagnetic force to enable the valve clack to be adsorbed on the valve seat sealing surface in a sealing mode.
2. A power-assisted back-seating check valve according to claim 1, wherein the power-assisted back-seating check valve is a lift type check valve, the valve flap moves up and down with respect to the valve seat sealing surface, and when the distance between the valve flap and the valve seat sealing surface is equal to or less than a predetermined value, the suction cup electromagnet is energized to generate electromagnetic force, and the valve flap is sealingly attracted to the valve seat sealing surface.
3. A power-assisted return-seat check valve according to claim 2 wherein the suction cup electromagnet is energized when the distance between the flap and the seat sealing surface is 1mm to 5mm or less.
4. A power-assisted return-seat check valve according to claim 2 wherein the suction cup electromagnet is de-energized when the flap is subjected to a positive through-flow pressure equal to or greater than a fixed pressure.
5. A power return check valve as defined in claim 2 wherein said flap is made of carbon steel or stainless steel material.
6. A power-assisted back-seating check valve according to claim 1, wherein the power-assisted back-seating check valve is a swing check valve, and when the angle between the valve flap and the valve seat sealing surface is equal to or smaller than a predetermined value, the suction cup electromagnet is energized to generate electromagnetic force to sealingly attract the valve flap to the valve seat sealing surface.
7. A power-assisted back-seat check valve according to claim 6 wherein the suction cup electromagnet is energized when the angle between the flap and the seat sealing surface is 1 ° to 3 °.
8. A power-assisted return-seat check valve according to claim 6 wherein the suction cup electromagnet is de-energized when the flap is subjected to a positive through-flow pressure equal to or greater than a fixed pressure.
9. A power-assisted return-seat check valve according to claim 6 wherein the flap is made of carbon steel or stainless steel material.
10. A power-assisted return-seat check valve according to any one of claims 1 to 9, wherein when the positive through-flow pressure to which the flap is subjected is equal to or greater than a set value, the suction cup electromagnet is de-energized, the electromagnetic force disappears, and the return-seat check valve opens normal through-flow.
11. A power-assisted return-seat type check valve according to any one of claims 1 to 9, wherein the suction cup electromagnet is provided in a ring-disk type or an arc-disk type divided into several sections, and is attached to a sealing surface of the valve seat, and when the suction cup electromagnet is energized, the suction cup electromagnet is magnetized, and when the suction cup electromagnet is de-energized, the suction cup electromagnet does not have residual magnetism, and the disk surface is subjected to waterproof and antiseptic treatment.
CN201911225145.0A 2019-12-04 2019-12-04 Power-assisted return seat type check valve Pending CN111006043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911225145.0A CN111006043A (en) 2019-12-04 2019-12-04 Power-assisted return seat type check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911225145.0A CN111006043A (en) 2019-12-04 2019-12-04 Power-assisted return seat type check valve

Publications (1)

Publication Number Publication Date
CN111006043A true CN111006043A (en) 2020-04-14

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ID=70114748

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Application Number Title Priority Date Filing Date
CN201911225145.0A Pending CN111006043A (en) 2019-12-04 2019-12-04 Power-assisted return seat type check valve

Country Status (1)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201363461Y (en) * 2009-03-23 2009-12-16 何岱东 Electromagnetic flue check valve
CN106609872A (en) * 2015-10-26 2017-05-03 德阳九鼎智远知识产权运营有限公司 Automatic one-way valve
CN206503978U (en) * 2017-01-23 2017-09-19 安徽斯瑞尔阀门有限公司 A kind of lift check valve suitable for low-pressure fluid
CN207421406U (en) * 2017-04-11 2018-05-29 天津市盛亿德阀门有限公司 A kind of Novel swing check valve
CN208503573U (en) * 2018-05-15 2019-02-15 苏素珍 A kind of boxing formula solid forging lift check valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201363461Y (en) * 2009-03-23 2009-12-16 何岱东 Electromagnetic flue check valve
CN106609872A (en) * 2015-10-26 2017-05-03 德阳九鼎智远知识产权运营有限公司 Automatic one-way valve
CN206503978U (en) * 2017-01-23 2017-09-19 安徽斯瑞尔阀门有限公司 A kind of lift check valve suitable for low-pressure fluid
CN207421406U (en) * 2017-04-11 2018-05-29 天津市盛亿德阀门有限公司 A kind of Novel swing check valve
CN208503573U (en) * 2018-05-15 2019-02-15 苏素珍 A kind of boxing formula solid forging lift check valve

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Application publication date: 20200414