CN114483978A - Sealing valve structure with reverse pressure relief function - Google Patents

Sealing valve structure with reverse pressure relief function Download PDF

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Publication number
CN114483978A
CN114483978A CN202111624234.XA CN202111624234A CN114483978A CN 114483978 A CN114483978 A CN 114483978A CN 202111624234 A CN202111624234 A CN 202111624234A CN 114483978 A CN114483978 A CN 114483978A
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CN
China
Prior art keywords
sealing
valve
reverse
pressure relief
outlet
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
CN202111624234.XA
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Chinese (zh)
Inventor
杨少伟
苌城
胡红林
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.)
AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
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AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
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 AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems filed Critical AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority to CN202111624234.XA priority Critical patent/CN114483978A/en
Publication of CN114483978A publication Critical patent/CN114483978A/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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293—Details of fluid inlet or outlet
    • 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
    • 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
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded

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

Abstract

The invention belongs to the technical field of aviation fuel oil, and relates to a sealing valve structure with a reverse pressure relief function. The device comprises an outlet valve with an outlet sealing function and a small sealing valve with reverse pressure relief, wherein two small reverse sealing valves are uniformly distributed on the side wall of the outlet valve, and the included angle of the small reverse sealing valves on the side wall is 15-45 degrees; the small sealing valve comprises a sealing valve seat shell, a spring, a rubber ring, a sealing ball and a sealing valve core body; the reverse sealing small valve and the outlet valve can be in interference fit or in threaded connection; the upper end of the sealed valve seat shell, which is close to the outlet valve, is provided with a sealing groove, a rubber ring is arranged in the sealing groove, a core body of the sealed valve is positioned in the valve seat shell, the upper end of the sealed shell is provided with a spring, and the spring pushes a sealing ball to be in contact sealing with the sealed valve seat shell. Improve the operational reliability of the outlet valve and prolong the service life of the outlet valve. Therefore, the quick-wear parts of the oil tank can be replaced under the condition of no oil drainage, and the maintainability of the fuel pump is greatly improved.

Description

Sealing valve structure with reverse pressure relief function
Technical Field
The invention belongs to the technical field of aviation fuel oil, and relates to a sealing valve structure with a reverse pressure relief function.
Background
Aviation fuel pump wide application is in aircraft fuel oil system, and present self sealss aviation fuel pump is more and more popularized, and the business turn over, the export of product have can reverse sealed valve structure, can realize that the oil tank changes vulnerable part under the condition of not blowing oil, improves the maintainability of fuel pump by a wide margin. When a product stops working, impact pressure can be formed at the rear part of the outlet valve to push the outlet valve to be quickly closed, so that the outlet valve is collided with the mounting shell, the problems of damage to the sealing surface of the outlet valve, impact noise and the like can be caused, and the phenomena of working reliability and service life reduction of the outlet valve are caused. The invention designs a small sealing valve structure for reversely releasing pressure on the outlet valve, so that the problems of service life, reliability and noise of the outlet valve at the moment when a product stops working can be solved.
Disclosure of Invention
The purpose of the invention is as follows: a sealing valve structure with reverse pressure relief function is provided. The small reverse valve structure is arranged on the outlet valve, so that impact pressure behind the outlet valve is released, the closing speed of the outlet valve is reduced, and the working reliability of the outlet valve is improved.
The technical scheme of the invention is as follows: the utility model provides a sealed valve structure with reverse pressure release function, valve structure includes the little valve of export valve and the sealed of reverse pressure release of export sealing effect, and the equipartition has two reverse little sealed valves on the lateral wall of export valve, the contained angle of reverse little sealed valve on the lateral wall is 15 to 45. The small sealing valve comprises a sealing valve seat shell, a spring, a rubber ring, a sealing ball and a sealing valve core body. The reverse sealing small valve and the outlet valve can be in interference fit or threaded connection. The upper end of the sealed valve seat shell, which is close to the outlet valve, is provided with a sealing groove, a rubber ring is arranged in the sealing groove, a core body of the sealed valve is positioned in the valve seat shell, the upper end of the sealed shell is provided with a spring, and the spring pushes a sealing ball to be in contact sealing with the sealed valve seat shell.
The reverse small sealing valves are preferably 3-6 in number, more preferably 4 in number and are uniformly distributed on the side wall of the outlet valve;
furthermore, the included angle between the reverse small sealing valve and the outer wall of the outlet valve is preferably 30 degrees;
further, the length of the reverse small sealing valve is 15-30 mm, and the width of the reverse small sealing valve is phi 5-10 mm;
furthermore, three rows of holes are arranged on the outer wall of the valve seat shell and are respectively positioned at the position, close to the outlet valve rod, of the upper end of the rubber ring, at the position of the sealing ball and at the position, close to the outer wall of the outlet valve, of the lower end of the rubber ring;
furthermore, the sizes of the holes at the positions, close to the valve rod of the outlet valve, of the upper end of the rubber ring and the positions, close to the outer wall of the outlet valve, of the lower end of the rubber ring are 0.5-1.5 mm, and the preferable size is 1 mm;
furthermore, the number of the holes at the upper end of the rubber ring close to the position of the valve rod of the outlet valve and at the lower end of the rubber ring close to the position of the outer wall of the outlet valve is 2-4, preferably 4;
furthermore, the rubber ring is nitrile butadiene rubber or fluorine silicon rubber, and can also be vulcanized on the outer side of the valve seat shell, and the compression amount is not more than 0.2 mm;
furthermore, the diameter of the hole at the position of the sealing ball is 1.5-2.5 mm, and the number of the holes is 2;
furthermore, the diameter of the sealing ball is preferably 3-5 mm, and the sealing ball is made of stainless steel;
further, the clearance between the sealing ball and the valve seat shell is 0.5-2 mm, preferably 1 mm;
further, the spring force of the spring is 3-10N, preferably 5N;
furthermore, the diameter of the steel wire of the spring is 0.2-0.5 mm, and the material is preferably 1Cr18Ni 9.
The invention has the advantages that: according to the invention, the small sealing valve with reverse pressure relief is arranged on the outlet sealing valve, so that impact pressure after the outlet valve is closed is released, the closing speed of the outlet valve is slowed down, the impact of the outlet valve on the mounting shell is reduced, the damage to the sealing surface of the outlet valve is reduced, the noise generated by the impact of the outlet valve on the shell is reduced, the working reliability of the outlet valve is improved, and the service life of the outlet valve is prolonged. Therefore, the quick-wear parts of the oil tank can be replaced under the condition of no oil drainage, and the maintainability of the fuel pump is greatly improved.
Description of the drawings:
FIG. 1 is a schematic view of the construction of an outlet shutter of the prior art construction;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic illustration of the operation of the present invention in a product;
FIG. 4 is a schematic illustration of the closed condition of the present invention in a product;
fig. 5 is a partially enlarged view of the drawing.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings, referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5.
Embodiment 1, the invention designs a sealing valve structure with a reverse pressure relief function, which comprises an outlet valve with an outlet sealing function and a small sealing valve with reverse pressure relief, wherein two small reverse sealing valves are uniformly distributed on the side wall of the outlet valve, and an included angle of the small reverse sealing valves on the side wall is 15-45 degrees. The small sealing valve comprises a sealing valve seat shell 1, a spring 2, a rubber ring 3, a sealing ball 4 and a sealing valve core body 5. The reverse sealing small valve and the outlet valve can be in interference fit or threaded connection. A sealing groove is formed in the upper end, close to the outlet valve, of the sealing valve seat shell 1, a rubber ring 3 is arranged in the sealing groove, a sealing valve core body is located inside the valve seat shell, a spring 2 is arranged at the upper end of the sealing shell, and the spring 2 abuts against a sealing ball to be in contact sealing with the sealing valve seat shell.
The reverse small sealing valves are preferably 3-6 in number, more preferably 4 in number, and are uniformly distributed on the side wall of the outlet valve, and the weight and the processing complexity are improved due to the fact that the reverse small sealing valves are too many;
furthermore, the included angle between the reverse small sealing valve and the outer wall of the outlet valve is preferably 30 degrees;
further, the length of the reverse small sealing valve is 15-30 mm, and the width of the reverse small sealing valve is phi 5-10 mm;
furthermore, three rows of holes are arranged on the outer wall of the valve seat shell 1 and are respectively positioned at the position, close to the valve rod of the outlet valve, of the upper end of the rubber ring 3, the position of the sealing ball 4 and the position, close to the outer wall of the outlet valve, of the lower end of the rubber ring;
furthermore, the size of the hole at the position, close to the valve rod of the outlet valve, of the upper end of the rubber ring 3 and the position, close to the outer wall of the outlet valve, of the lower end of the rubber ring is 0.5-1.5 mm, preferably 1mm, leakage can be caused when the hole diameter is too large, the product performance is influenced, and the pressure relief function is influenced when the hole diameter is too small;
furthermore, the number of the holes at the positions, close to the valve rod of the outlet valve, of the upper end of the rubber ring 3 and the positions, close to the outer wall of the outlet valve, of the lower end of the rubber ring is 2-4, and the number of the holes is preferably 4;
further, the rubber ring 3 is nitrile butadiene rubber or fluorine silicon rubber, and can also be vulcanized on the outer side of the valve seat shell, the compression amount is 0.1-0.25 mm, the sealing is influenced when the compression amount is small, and the disassembly and assembly are influenced when the compression amount is large;
furthermore, the diameter of the hole at the position of the sealing ball 4 is 1.5-2.5 mm, the number of the holes is 2, when the pressure of a product is too high, the sealing valve ball is pressed on the sealing valve core body, and high-pressure fluid can flow through the hole around the sealing ball body, so that the pressure relief function can be realized;
furthermore, the diameter of the sealing ball 4 is preferably 3-5 mm, the sealing ball is made of stainless steel and is mainly used for sealing, when the pressure flowing into the valve is low, the sealing ball 4 is connected with the valve seat shell 1 under the action of spring force, the upper end sealing can be realized, when the pressure of a product is too high, the valve sealing ball 4 is pressed on the sealing valve core body 5, the lower end sealing can be realized, and the leakage amount is reduced;
further, the clearance between the sealing ball 4 and the valve seat shell 1 is 0.5-2 mm, preferably 1 mm;
further, the spring force of the spring 2 is 3-10N, preferably 5N, the spring force is too small, the sealing capability is poor, and the opening pressure of the valve is increased due to the fact that the spring force is large, so that the pressure relief effect is affected;
furthermore, the diameter of the steel wire of the spring 2 is 0.2-0.5 mm, and the material is preferably 1Cr18Ni 9.
Embodiment 2 provides a sealed valve structure with reverse pressure release function, and the valve is installed at the entrance point of fuel pump, and the rated boost pressure value of this fuel pump is 420kPa, the reverse seal pressure 20kPa of self sealss, and the experiment on the product of installing export valve original structure shows: the impact pressure at the outlet valve reaches 1.6MPa when the product is closed, the closing time can be calculated to be 0.001s according to the closing stroke of 19cm, the instantaneous noise of the valve impacting the mounting shell reaches 100 decibels, and the physical and psychological health of the crew is seriously influenced. After using this structure, the circumference sets up 4 pressure release valves, and reverse little valve is opened pressure 40kPa (guarantee the oil-tight when reverse sealed), and the experiment shows on the product of installation outlet valve new construction: when the product is closed, the impact pressure at the outlet valve is about 0.6MPa, the closing time can be calculated to be 0.03s according to the closing stroke of 19cm, and the noise at the moment when the valve impacts the mounting shell is reduced to 80 decibels; the working reliability of the outlet valve is ensured.

Claims (10)

1. A sealing valve structure with a reverse pressure relief function is characterized by comprising an outlet valve with an outlet sealing function and a small sealing valve with reverse pressure relief function, wherein two small reverse sealing valves are uniformly distributed on the side wall of the outlet valve, and the included angle of the small reverse sealing valves on the side wall is 15-45 degrees; the small sealing valve comprises a sealing valve seat shell, a spring, a rubber ring, a sealing ball and a sealing valve core body; the reverse sealing small valve and the outlet valve can be in interference fit or in threaded connection; the upper end of the sealed valve seat shell, which is close to the outlet valve, is provided with a sealing groove, a rubber ring is arranged in the sealing groove, a core body of the sealed valve is positioned in the valve seat shell, the upper end of the sealed shell is provided with a spring, and the spring pushes a sealing ball to be in contact sealing with the sealed valve seat shell.
2. The sealing valve structure with reverse pressure relief function according to claim 1, wherein preferably 3-6, more preferably 4, are uniformly distributed on the side wall of the outlet valve.
3. A sealing shutter construction with reverse pressure relief according to claim 1, characterized in that the angle between the small reverse sealing shutter and the outer wall of the outlet shutter is preferably 30 °.
4. The sealing valve structure with reverse pressure relief function as claimed in claim 1, wherein the reverse small sealing valve has a length of 15-30 mm and a width of 5-10 mm.
5. The sealing valve structure with reverse pressure relief function according to claim 1, wherein three rows of holes are disposed on the outer wall of the valve seat housing, and are respectively located at the upper end of the rubber ring near the valve rod of the outlet valve, the sealing ball and the lower end near the outer wall of the outlet valve.
6. The sealing valve structure with reverse pressure relief function as claimed in claim 1, wherein the size of the hole at the upper end of the rubber ring near the valve rod of the outlet valve and at the lower end near the outer wall of the outlet valve is 0.5-1.5 mm, preferably 1 mm.
7. The sealing valve structure with reverse pressure relief function as claimed in claim 1, wherein the number of holes at the upper end of the rubber ring near the valve rod of the outlet valve and at the lower end near the outer wall of the outlet valve is 2-4, preferably 4.
8. The sealing valve structure with reverse pressure relief function as claimed in claim 1, wherein the rubber ring is nitrile butadiene rubber or fluorosilicone rubber, and can also be vulcanized on the outside of the valve seat housing, and the compression amount is not greater than 0.2 mm.
9. The sealing valve structure with the reverse pressure relief function according to claim 1, wherein the diameter of the hole at the position of the sealing ball is 1.5-2.5 mm, and the number of the holes is 2; the diameter of the sealing ball is preferably 3-5 mm, and the sealing ball is made of stainless steel; the clearance between the sealing ball and the valve seat shell is 0.5-2 mm, and preferably 1 mm.
10. The sealing valve structure with the reverse pressure relief function according to claim 1, wherein the spring force of the spring is 3-10N, preferably 5N; the diameter of the steel wire of the spring is 0.2-0.5 mm, and the material is 1Cr18Ni 9.
CN202111624234.XA 2021-12-28 2021-12-28 Sealing valve structure with reverse pressure relief function Pending CN114483978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111624234.XA CN114483978A (en) 2021-12-28 2021-12-28 Sealing valve structure with reverse pressure relief function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111624234.XA CN114483978A (en) 2021-12-28 2021-12-28 Sealing valve structure with reverse pressure relief function

Publications (1)

Publication Number Publication Date
CN114483978A true CN114483978A (en) 2022-05-13

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ID=81496116

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111624234.XA Pending CN114483978A (en) 2021-12-28 2021-12-28 Sealing valve structure with reverse pressure relief function

Country Status (1)

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CN (1) CN114483978A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2325558Y (en) * 1998-02-27 1999-06-23 李朝元 Automatic sealing active door for air compressor
CN207500558U (en) * 2017-12-05 2018-06-15 浙江立致金属制品科技有限公司 A kind of threeway multifunctional non-return valve
CN111306354A (en) * 2020-04-02 2020-06-19 江苏宏泰石化机械有限公司 Lifting type check valve capable of reducing water hammer damage
CN211599643U (en) * 2019-12-06 2020-09-29 江西洪都航空工业集团有限责任公司 Heat release pressure one-way valve for fuel pipeline
CN113685590A (en) * 2021-10-26 2021-11-23 南通长江阀门制造有限公司 High-strength explosion-proof valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2325558Y (en) * 1998-02-27 1999-06-23 李朝元 Automatic sealing active door for air compressor
CN207500558U (en) * 2017-12-05 2018-06-15 浙江立致金属制品科技有限公司 A kind of threeway multifunctional non-return valve
CN211599643U (en) * 2019-12-06 2020-09-29 江西洪都航空工业集团有限责任公司 Heat release pressure one-way valve for fuel pipeline
CN111306354A (en) * 2020-04-02 2020-06-19 江苏宏泰石化机械有限公司 Lifting type check valve capable of reducing water hammer damage
CN113685590A (en) * 2021-10-26 2021-11-23 南通长江阀门制造有限公司 High-strength explosion-proof valve

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