CN205190847U - Backpressure formula check valve - Google Patents
Backpressure formula check valve Download PDFInfo
- Publication number
- CN205190847U CN205190847U CN201521026585.0U CN201521026585U CN205190847U CN 205190847 U CN205190847 U CN 205190847U CN 201521026585 U CN201521026585 U CN 201521026585U CN 205190847 U CN205190847 U CN 205190847U
- Authority
- CN
- China
- Prior art keywords
- valve
- seat
- gap
- spring
- check valve
- 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
Links
Abstract
The utility model discloses a backpressure formula check valve belongs to the check valve, aim at providing the check valve of a steerable opening time or dominant discharge. It is including the case that is arranged in the valve body, the valve body comprises valve gap (7) with disk seat (1) fixed connection, has on valve gap (7) through inlet port (9) of valve opening with disk seat (1) intercommunication, the case is by being located valve (5) in the valve opening, valve seat (2) that are arranged in disk seat (1) and spring (3) constitute, and push up valve (5) tightly in inlet port (9) through valve seat (2) spring (3), have annular (6) on valve gap (7), this annular corresponds the intercommunication through oil outlet (11), orifice (12) of establishing on valve gap (7) with inlet port (9), disk seat (1) respectively. The utility model discloses the motion of simple structure, valve strike little, operate steadily, be the check valve of a steerable opening time or dominant discharge.
Description
Technical field
The utility model relates to a kind of one-way valve, particularly relates to a kind of back pressure type one-way valve.
Background technique
As everyone knows, duplex gear pump is in series by the gear pump of two-stage synchronous axial system.Due to initial start stage, the fluid of first order gear pump not yet arrives the pump chamber of second level gear pump, and therefore second level gear pump is in dry condition, and gear easily damages.For this reason, usually need increase an one-way valve low pressure oil at first order gear pump inlet place is caused in the pump chamber of second level gear pump to lubricate between two-stage gear pump.
Traditional one-way valve is made up of valve body, spool and spring usually.Its working principle is: rely on the pressure oil of forward flow push open by the valve of spring compression on valve base and realize one-way conduction, automatically close when the pressure of positive pressure oil is less than the pressure of spring pressure or backpressure oil.But the one-way valve of this conventional construction only could be closed automatically when the pressure of pressure oil is less than predetermined value, if open the pressure remained constant of the positive pressure oil of valve or continue to strengthen, valve then cannot be closed.
One-way valve according to above-mentioned traditional mechanism provides lubricant oil to second level gear pump, and only have when the pressure oil that first order gear pump exports arrives second level gear pump, valve just can be closed because backpressure raises.Obviously, owing to adds additional a large amount of lubricant oil, easily cause the difference in flow of two-stage gear pump to increase, cause the load imbalance of two-stage gear pump.Therefore a kind of one-way valve that can control the opening time or control flow must be developed.
Summary of the invention
For the above-mentioned defect existed in prior art, the utility model aims to provide a kind of back pressure type one-way valve controlling the opening time or control flow.
To achieve these goals, the utility model by the following technical solutions: it comprises the spool being arranged in valve body; Described valve body is made up of the valve gap be fixedly connected with valve seat, valve gap has the oil inlet hole be communicated with valve seat by valve opening; Described spool is formed by being arranged in the valve of described valve opening, the valve base being arranged in valve seat and spring, and valve holds out against in oil inlet hole by valve base by spring; Valve gap has annular groove, this annular groove respectively by the oil outlet be located on valve gap, throttle orifice and oil inlet hole, valve seat is corresponding is communicated with.
Spring seat is fixed with in valve seat; It is sphere-contact between valve and valve base.
Compared with the prior art, the utility model is owing to have employed technique scheme, the basis of conventional construction adds annular groove, and add the throttle orifice be communicated with valve body by annular groove, therefore when valve is pushed open and flow to the pump chamber of second level gear pump by annular groove by pressure oil, part pressure oil then can inject valve body through throttle orifice, and when being greater than the positive pressure oil in valve opening when the back pressure in valve body, valve is closed automatically; Thus can avoid causing the difference in flow of two-stage gear pump to increase because injecting lubricant oil extra in a large number.The utility model has the advantages such as structure is simple, valve elliptical gear is little, operate steadily.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
In figure: valve seat 1, valve base 2, spring 3, spring seat 4, valve 5, annular groove 6, valve gap 7, mounting plate 8, oil inlet hole 9, Sealing 10, oil outlet 11, throttle orifice 12.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
As shown in Figure 1: in valve body, have spool, described valve body is made up of the valve gap 7 be fixedly connected with the valve seat 1 of tubular structure, valve gap 7 has the oil inlet hole 9 be communicated with valve seat 1 by valve opening (not indicating in figure); Described spool is formed by being arranged in the valve 5 of described valve opening, the valve base 2 being arranged in valve seat 1 and spring 3, and valve 5 holds out against in oil inlet hole 9 by valve base 2 by spring 3; Valve gap 7 has annular groove 6, this annular groove respectively by the oil outlet 11 be located on valve gap 7, throttle orifice 12 and oil inlet hole 9, valve seat 1 is corresponding is communicated with.
In order to avoid being convenient to position spring 3, in valve seat 1, be fixed with spring seat 4; In order to ensure that valve 5 moves freely, avoid producing jam, be sphere-contact between valve 5 and valve base 2.
During use, the utility model is fixed on mounting plate 8 by screw thread, in order to avoid leakage of oil, between valve gap 7 and mounting plate 8, is provided with Sealing 10; Can form an airtight ring-shaped chamber between annular groove 6 and mounting plate, this cavity volume is conducive to being formed in valve body and forms back pressure.
Claims (3)
1. a back pressure type one-way valve, comprises the spool being arranged in valve body; It is characterized in that: described valve body is made up of the valve gap (7) be fixedly connected with valve seat (1), valve gap (7) has the oil inlet hole (9) be communicated with valve seat (1) by valve opening; Described spool is formed by being arranged in the valve (5) of described valve opening, the valve base (2) being arranged in valve seat (1) and spring (3), and valve (5) holds out against in oil inlet hole (9) by valve base (2) by spring (3); Valve gap (7) has annular groove (6), this annular groove respectively by the oil outlet (11) be located on valve gap (7), throttle orifice (12) and oil inlet hole (9), valve seat (1) is corresponding is communicated with.
2. back pressure type one-way valve according to claim 1, is characterized in that: be fixed with spring seat (4) in valve seat (1).
3. back pressure type one-way valve according to claim 1 and 2, is characterized in that: be sphere-contact between valve (5) and valve base (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521026585.0U CN205190847U (en) | 2015-12-14 | 2015-12-14 | Backpressure formula check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521026585.0U CN205190847U (en) | 2015-12-14 | 2015-12-14 | Backpressure formula check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205190847U true CN205190847U (en) | 2016-04-27 |
Family
ID=55783837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521026585.0U Expired - Fee Related CN205190847U (en) | 2015-12-14 | 2015-12-14 | Backpressure formula check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205190847U (en) |
-
2015
- 2015-12-14 CN CN201521026585.0U patent/CN205190847U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20181214 |