CN202302121U

CN202302121U - Serial one-way valve

Info

Publication number: CN202302121U
Application number: CN2011203654714U
Authority: CN
Inventors: 潘振兴; 陆冰
Original assignee: Shanghai Institute of Space Propulsion
Current assignee: Shanghai Institute of Space Propulsion
Priority date: 2011-09-27
Filing date: 2011-09-27
Publication date: 2012-07-04
Anticipated expiration: 2021-09-27

Abstract

The utility model discloses a novel serial one-way valve which is formed by an inlet nozzle, a filter assembly, a primary valve seat, a first sealing ring, a double valve element, a spring, a second sealing ring, a secondary valve seat and an outlet nozzle. The double valve element is formed in a mode that a primary valve element and a secondary valve element are connected into one whole body. The filter assembly is arranged on the inlet nozzle. An outer shell of the one-way valve is formed by the inlet nozzle, the outlet nozzle, the primary valve seat and the secondary valve seat. The double valve element is arranged in the outer shell. The spring is arranged in the primary valve element. The first sealing ring and the second sealing ring are arranged on the double valve element. The novel serial one-way valve is particularly suitable for carrying out reliability management on the working medium flowing direction of a space vehicle propulsion system and preventing a working medium on the downstream from flowing back to the upstream.

Description

The tandem one-way valve

Technical field

The utility model relates to a kind of flow direction control valve, specifically is a kind of one-way valve with series redundancy and double spool coenosarc formula structure, is specially adapted on the higher spacecraft propulsion system of reliability requirement.

Background technique

One-way valve is the management apparatus of spacecraft propulsion system working medium circulating direction, prevents that downstream oxidation agent or fuel are back to the upper reaches and mix, and causes spontaneous combustion, blasts.At present, known one-way valve structures generally is divided into two kinds: 1) single-stage, to form by spool, valve seat and spring basically, and the reverse leak rate sealing of such one-way valve is poor, at the bottom of the reliability; 2) two-stage type (tandem) is generally formed one with two single-stage one-way valves, comprises two spools, two valve seats and two springs, and this kind structure one-way valve is prone to pipeline resonance to take place in the working medium flow process and waits the phenomenon that pipes.In a word; Existing one-way valve or tandem one-way valve applicability on spacecraft are little; At the bottom of the reverse sealing reliability; And the dual spring tandem one-way valve of independently controlling two spool work respectively is prone to take place in the working fluid medium flow process with pipeline the phenomenons that pipe such as resonance, so can't on spacecraft, be used widely.

The one-way valve of series redundancy and double spool coenosarc formula structure has solved the problems referred to above, and present bibliographical information.

The model utility content

The utility model technical problem to be solved provides a kind of one-way valve of novel spool coenosarc formula cascaded structure, is intended to overcome 1) the reverse sealing of existing single-stage one-way valve is poor, at the bottom of the reliability; 2) the existing two-stage dual spring tandem one-way valve of independently controlling two spool work respectively is prone at working medium the resonance grade problem that pipes to take place in flow process with pipeline.The utility model is applicable to long-term work under big flow, the corrosivity working medium.

The utility model for the technological scheme that solves its technical problem and adopt is: a kind of tandem one-way valve, single spring, spool coenosarc formula structure; This one-way valve is realized the reliability management to the working medium circulating direction; Prevent that the downstream working medium is back to the upper reaches, and reduce the tandem one-way valve probability of resonance takes place in the working medium flow process that wherein: this tandem one-way valve comprises inlet nipple, filter assemblies, one-level valve seat, first seal ring, double spool, spring, second seal ring, secondary valve seat and outlet ozzle formation with pipeline; Filter assemblies is installed in the inlet nipple; Inlet nipple, outlet ozzle and one-level valve seat, secondary valve seat have been formed the one-way valve external casing, and double spool is linked into an integrated entity by one-level spool and secondary spool, and double spool is located in the external casing; Spring is located in the one-level spool; Under no working medium situation, play the effect that makes the double spool return, first seal ring is contained on the one-level spool of double spool; Second seal ring is contained on the secondary spool of double spool, seals.

Preferably, in the above-mentioned tandem one-way valve of the utility model, double spool is connected in series through screw thread by one-level spool and secondary spool and is integral, and double spool and bivalve seat series redundancy structure prevent that effectively reliably working medium from refluxing.

Compare with existing one-way valve; The utility model has following innovation and reaches outstanding progress: 1) the tandem one-way valve structures is novel; Double spool is an integral structure; Only need a spring to control under the structure of series connection, prevent that effectively under working medium flows, with pipeline resonance taking place waits the problem that pipes; 2) the one-way valve inside nominal diameter of this kind structure is big, and working flow is big, and the redundant sealing of tandem prevents that working medium from refluxing, and is specially adapted to the spacecraft propulsion system.

Description of drawings

Fig. 1 is the structural principle schematic representation of the utility model tandem one-way valve double spool when closing.

Structural principle schematic representation when Fig. 2 is the unlatching of the utility model tandem one-way valve double spool.

Wherein: 1 is that inlet nipple, 2 is that filter assemblies, 3 is that one-level valve seat, 4 is that first seal ring, 5 is that test port, 6 is that one-level spool, 7 is that double spool, 8 is that spring, 9 is that second seal ring, 10 is that secondary spool, 11 is that secondary valve seat, 12 is to export ozzle.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, further set forth the utility model.These embodiments be interpreted as only being used to the utility model is described and be not used in the restriction the utility model protection domain.After the content of having read the utility model record, those skilled in the art can do various changes or modification to the utility model, and these equivalences change and modification falls into the utility model claim institute restricted portion equally.

As shown in Figure 1; The tandem one-way valve that the utility model preferred embodiment provides; Constitute by inlet nipple 1, filter assemblies 2, one-level valve seat 3, first seal ring 4, test port 5, double spool 7, spring 8, second seal ring 9, secondary valve seat 11, outlet ozzle 12, wherein:

Double spool 7 is made up of one-level spool 6 and secondary spool 10; Filter assemblies 2 is contained on the inlet nipple 1, and inlet nipple 1, outlet ozzle 12 and one-level valve seat 3, secondary valve seat 11 have been formed the one-way valve external casing, and double spool 7 is located in the external casing; Spring 8 is in one-level spool 6; Play the effect that makes double spool 7 returns, first seal ring 4, second seal ring 9 are contained on the double spool 7, seal.

As shown in Figure 1, the tandem one-way valve is the two-stage redundancy structure of one-level valve seat 3, secondary valve seat 11 and double spool 7, by the return of a spring 8 control double spools 7.

As shown in Figure 1, double spool 7 is an integral structure, forms one through being threaded by one-level spool 6 and secondary spool 10, and first seal ring 4 is located on the one-level spool 6, and second seal ring 9 is located on the secondary spool 10, plays seal action.

As shown in Figure 1; Test port is located on the one-level valve seat; Between one-level spool 6 and secondary spool 10, the one, play the sealing situation of testing one-level spool 6 and one-level valve seat 3, the 2nd, play test gas discharge effect in the cavity volume between one-level spool 6 and the secondary spool 10.

Specify the working principle and the course of action of the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, closed position, double spool 7 is in right-hand member, and the downstream working medium can't oppositely flow back to the upper reaches, and the reverse operation medium provides off-position pressure to double spool, guarantees that first seal ring 4, second seal ring 9 fit with one-level valve seat 3, secondary valve seat 11.

As shown in Figure 2, the enable possition, double spool 7 is in left end, and the early-stage work medium flows to downstream, the circulation of Control work medium through the passage between double spool 7 and one-level valve seat 3, the secondary valve seat 11.

As stated, the utility model utilize the double spool structure solved reverse sealing high, under the working medium current intelligence and problem such as the pipeline resonance probability is little, the utility model is specially adapted on the spacecraft propulsion system.

Claims

1. a tandem one-way valve is characterized in that, constitute by inlet nipple [1], filter assemblies [2], one-level valve seat [3], first seal ring [4], double spool [7], spring [8], second seal ring [9], secondary valve seat [11] and outlet ozzle [12],

Double spool [7] is linked into an integrated entity by one-level spool [6] and secondary spool [10]; Filter assemblies [2] is installed on the inlet nipple [1]; Inlet nipple [1], outlet ozzle [12] and one-level valve seat [3], secondary valve seat [11] are formed the one-way valve external casing; Double spool [7] is located in the external casing, and spring [8] is located in the one-level spool [6], and first seal ring [4], second seal ring [9] are installed on the double spool [7].

2. tandem one-way valve according to claim 1 is characterized in that, double spool [7] is connected in series through screw thread by one-level spool [6] and secondary spool [10] and is integral.

3. tandem one-way valve according to claim 1 and 2 is characterized in that, further includes test port [5], and test port is located on the one-level valve seat, between one-level spool [6] and secondary spool [10].