CN201866341U - Micropressure check valve - Google Patents
Micropressure check valve Download PDFInfo
- Publication number
- CN201866341U CN201866341U CN 201020592154 CN201020592154U CN201866341U CN 201866341 U CN201866341 U CN 201866341U CN 201020592154 CN201020592154 CN 201020592154 CN 201020592154 U CN201020592154 U CN 201020592154U CN 201866341 U CN201866341 U CN 201866341U
- Authority
- CN
- China
- Prior art keywords
- valve
- flap
- support
- valve body
- clack
- 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.)
- Expired - Fee Related
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- Safety Valves (AREA)
- Check Valves (AREA)
Abstract
The utility model relates to a micropressure check valve, which comprises a valve bonnet, a valve clack, a support, pressure springs, a pressing cover and a valve body. The valve bonnet, the valve body, a valve spool and the support are mounted coaxially, and the pressure springs are sleeved on the valve clack between the valve clack and the pressing cover. The micropressure check valve is characterized in that (1) the valve clack is a reducing valve clack, the diameter of the valve clack corresponding to the position of a medium inflow direction is smaller than that of the valve clack corresponding to the position of a medium outflow direction, a through hole communicated with an inner cavity of the support is manufactured on the pressing cover, and (2) a vent hole communicated with external air is manufactured radially in a valve clack cavity and transversely penetrates through the support and the valve body. The check valve is simple in structure, scientific in design, flexible in action and reliable in operation, has the function of sealing with low differential pressure, and is widely used for various water injection systems.
Description
Technical field
The invention belongs to the valve class, especially a kind of minute-pressure safety check.
Background technique
Safety check has rotary-open type and two kinds of structures of rise-fall type, advantages such as simple in structure, convenient installation that the rotary-open type structure has, but boundary dimension is bigger, and it is more to take up room, and the installation position is equipped with clear and definite specific (special) requirements; And the lifting structure compact structure, and to not having special requirement in the mounting point, but when inlet/outlet end pressure medium difference hour, valve is then difficult realizes sealing.
Above-mentioned existing two kinds of safety check and present patent application structurally reach on the function all to be had than big-difference.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of minute-pressure safety check is provided, this safety check efficiently solves pressure difference tight, problem that can't seal of valve closing when very little.
The object of the present invention is achieved like this:
A kind of minute-pressure safety check comprises valve gap, flap, support, pressure spring, gland, valve body, the coaxial installation of valve gap, valve body, spool and support, and suit pressure spring on the flap between flap and the gland is characterized in that:
(1) described flap is the reducing flap, and the diameter of the flap at corresponding MEDIA FLOW Inbound place is less than the diameter of the flap at MEDIA FLOW outgoing direction place, on gland, be shaped on one be communicated with rack bore through hole.
(2) radially be shaped on a vent that is communicated with outside atmosphere in the flap chamber, this vent crosses support and valve body.
And, between the valve body of vent both sides and support, all adopt the seal ring sealing.
Advantage of the present invention and good effect are:
1, the built-up welding on the valve gap interior edge face of this safety check has valve seat, flap is installed on support, below flap, be coaxially installed with a pressure spring, support is installed on the valve body by screw thread, on support and valve body, be provided with vent, this vent connects space and the extraneous atmosphere between support and the flap, and valve vertical position and horizontal position all can be installed, and are not subjected to the restriction of mounting point.
2, this check valve structure is simple, and design science has the function of low differential pressure sealing, and valve event is flexible, and reliable operation is widely used in various flood patterns.
Description of drawings
Accompanying drawing 1 is a cross section of the present invention sectional structure chart.
Embodiment
Be further described below in conjunction with 1 pair of embodiments of the invention of accompanying drawing, need to prove: present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of minute-pressure safety check, form by main parts size such as valve gap 1, flap 12, support 3, pressure spring 7, gland 9, valve bodies 10, the coaxial installation of valve gap, valve body, spool and support, wherein, seal ring 2 sealings are installed and adopted to valve gap with valve body is coaxial by thread engagement, coaxial by thread engagement mode mounting bracket in valve body, the interior coaxial installation flap of support also adopts seal ring 6,13 sealings, by bolt 11 coaxial installation glands, gland is limited in flap in the rack bore this support at the MEDIA FLOW outgoing direction; Suit pressure spring on the flap between flap and the gland.
Innovative point of the present invention is:
(1) described flap is the reducing flap, and the diameter of the flap at corresponding MEDIA FLOW Inbound place is shaped on the through hole 8 of a connection rack bore less than the diameter of the flap at MEDIA FLOW outgoing direction place on gland.
(2) radially be shaped on a vent 5 that is communicated with outside atmosphere in the flap chamber, this vent crosses support and valve body, and all adopts seal ring 4 sealings between the valve body of vent both sides and support.
Working principle of the present invention is:
On support and valve body, be provided with vent, be communicated with space and extraneous atmosphere between support and the flap, flap can be moved, liquid medium flows into from the valve inlet end, outlet end flows out, when the liquid medium reverse flow, because flap is the reducing flap, it is little at entrance point place area, outlet end place area is big, so when even inlet/outlet end pressure difference is very little, because outlet end place flap area is bigger, have the very big seat power of returning, guaranteed the sealability of valve.
Claims (2)
1. minute-pressure safety check, comprise valve gap, flap, support, pressure spring, gland, valve body, the coaxial installation of valve gap, valve body, spool and support, suit pressure spring on the flap between flap and the gland, it is characterized in that: described flap is the reducing flap, the diameter of the flap at corresponding MEDIA FLOW Inbound place is less than the diameter of the flap at MEDIA FLOW outgoing direction place, on gland, be shaped on one be communicated with rack bore through hole; Radially be shaped on the vent of a connection outside atmosphere in the flap chamber, this vent crosses support and valve body.
2. minute-pressure safety check according to claim 1 is characterized in that: all adopt the seal ring sealing between the valve body of vent both sides and support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020592154 CN201866341U (en) | 2010-11-04 | 2010-11-04 | Micropressure check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020592154 CN201866341U (en) | 2010-11-04 | 2010-11-04 | Micropressure check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201866341U true CN201866341U (en) | 2011-06-15 |
Family
ID=44137497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020592154 Expired - Fee Related CN201866341U (en) | 2010-11-04 | 2010-11-04 | Micropressure check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201866341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975293A (en) * | 2010-11-04 | 2011-02-16 | 天津百利展发集团有限公司 | Micro-pressure check valve |
-
2010
- 2010-11-04 CN CN 201020592154 patent/CN201866341U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975293A (en) * | 2010-11-04 | 2011-02-16 | 天津百利展发集团有限公司 | Micro-pressure check valve |
| CN101975293B (en) * | 2010-11-04 | 2013-01-09 | 天津百利展发集团有限公司 | Micro-pressure check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20131104 |