CN208793714U - A kind of low pressure check valve - Google Patents

Abstract

The utility model discloses a kind of low pressure check valves, including entrance valve body and outlet valve body, it is fixedly connected between the entrance valve body and outlet valve body by protecting crust, the junction of the entrance valve body and outlet valve body is provided with lifting head, the inside of the outlet valve body is equipped with spring, one end of the spring is close to lifting head, and the other end of spring and the inner wall of outlet valve body offset, one end of the outlet valve body is fixed with safety cap, it is threadedly coupled between the entrance valve body and protecting crust by first, it is threadedly coupled between the protecting crust and outlet valve body by second.The utility model passes through inlet porting valve body, the first screw thread, lifting head, spring, outlet valve body, fixture block, protecting crust, O-ring, the second screw thread, safety cap, external seal pad and interior gasket, the check valve solved at this stage is not provided with sensitive low pressure regulating mechanism, cannot be normally-open under low voltage situations and problem that its cost is high.

Description

A kind of low pressure check valve

Technical field

The utility model relates to valve arrangement technical field, specially a kind of low pressure check valve.

Background technique

Currently, check valve is that fluid can only be flowed along water inlet, water outlet medium can not but flow back, and be commonly called as check valve.It is single Check-valves or non-return valve are also known as to valve.For preventing oil stream reverse flow in hydraulic system, or for being prevented in pneumatic system Compressed air reverse flow.Check valve has through type and two kinds of right-angle type.Straight check valve, which is threadedly coupled, is mounted on pipeline On.Angle check valve has threaded connection, board-like connection and three kinds of forms of flanged joint.Air check valve is the one of check valve Kind, gas circulation can be played the role of in special space, the use of cooling gas check valve greatly facilitates industrial production and people Life, cooling gas check valve at this stage can satisfy its basic use function when in use, however in actual use still There is some shortcomings.

Through retrieving, patent announcement number is a kind of minute-pressure check valve disclosed in 205350464 U of CN, including both ends penetrate through Valve shell and be set to the intracorporal valve body of its chamber, the fixed guide of boss and I-shaped is provided in the cavity of valve body Fixed pole, the upper end platform side for being oriented to fixed link contact sealing with the side wall of boss, are oriented on the lower end platform of fixed link and place There is a spring, the bottom surface of spring and boss is oppositely arranged.

Disadvantage possessed by a kind of minute-pressure check valve is insufficient in the prior art:

1. existing unidirectional clear valve diameter is generally directed to the higher situation of pressure, generally in 1000psi-6000psi pressure In range, lack the condition that can stablize unlatching under minute-pressure environment, and minute-pressure regulating mechanism is arranged in the check valve, in minute-pressure item Part lower valve can also normally start, however the sensitivity of the device is bad, cannot play under minute-pressure flow conditions well Autoregulation, in the case where low-pressure air current, the unlatching that valve can not be stable, using effect is bad, and sensitivity is not strong, And then the use of check valve is influenced, use condition is limited；

2. the apparatus structure is cumbersome, cost is higher, and operation difficulty is big, so that the universal and popularization of device is limited, is unfavorable for The use of equipment.

Utility model content

(1) the technical issues of solving

The purpose of this utility model is to provide a kind of low pressure check valve, the check valve solved at this stage is not provided with spirit Quick low pressure regulating mechanism, cannot be normally-open under low voltage situations and problem that its cost is high.

(2) technical solution

To achieve the above object, the utility model provides the following technical solutions: a kind of low pressure check valve, including entrance valve body With outlet valve body, it is fixedly connected between the entrance valve body and outlet valve body by protecting crust, the entrance valve body and outlet valve The junction of body is provided with lifting head, and the inside of the outlet valve body is equipped with spring, one end of the spring close to lifting head, And the other end of spring and the inner wall of outlet valve body offset, one end of the outlet valve body is fixed with safety cap.

Preferably, it is threadedly coupled between the entrance valve body and protecting crust by first, the protecting crust and outlet valve body Between by second be threadedly coupled.

Preferably, the fixed lifting head of O-ring that the outlet valve body passes through internal setting.

Preferably, the entrance valve body is internally provided with fixture block, and one end interval of fixture block and the outlet valve body sets It sets.

Preferably, the outlet valve body is closely connect by external seal pad and interior gasket with one end of the protecting crust.

(3) beneficial effect

The utility model provides a kind of low pressure check valve, have it is following the utility model has the advantages that

1, the utility model passes through inlet porting valve body, the first screw thread, lifting head, spring, outlet valve body, fixture block, protection Shell, O-ring, the second screw thread, external seal pad and interior gasket, the entrance valve body and outlet valve body of the utility model pass through protection Shell connection, and lifting head is set between entrance valve body and outlet valve body, which can limit air-flow when in use, in low pressure When air-flow passes through, lifting head cooperation spring needle adjusts minute-pressure environment, to guarantee the normally-open of check valve and close, protects The normal use of card check valve increases the sensitivity of device with this so that the sensitivity of device is more preferable, can be obtained using functionality It to guarantee, is applied under more Space, Places and environment, the scope of application is wider, is convenient for the use of device with this.

2, the utility model passes through inlet porting valve body, the first screw thread, lifting head, spring, outlet valve body, fixture block, protection Shell, O-ring, the second screw thread, external seal pad and interior gasket, the low pressure check valve are used relative to traditional low pressure check valve Sensitivity is good, and present apparatus structure is simple, cost is lower, and the operation difficulty in production is small, therefore the present apparatus is produced into This is small, convenient for its promotion and popularization.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the explosive view of the utility model.

In figure: 1, entrance valve body；2, the first screw thread；3, lifting head；4, spring；5, valve body is exported；6, fixture block；7, it protects Shell；8, O-ring；9, the second screw thread；10, safety cap；11, external seal pad；12, interior gasket.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figs. 1-2, a kind of embodiment provided by the utility model: a kind of low pressure check valve, including 1 He of entrance valve body Valve body 5 is exported, is fixedly connected between entrance valve body 1 and outlet valve body 5 by protecting crust 7, entrance valve body 1 and protecting crust when installation It is connected, is connected between protecting crust 7 and outlet valve body 5 by the second screw thread 9, and entrance valve body 1 by the first screw thread 2 between 7 Be internally provided with fixture block 6, and one end interval of fixture block 6 and outlet valve body 5 is arranged, and the setting of fixture block 6 can increase inlet valve The mounting stability of body 1, it is not easily to fall off, while the junction of entrance valve body 1 and outlet valve body 5 is provided with lifting head 3, lifting head 3 be the control element inside check valve, and when use can control air-flow, the O-ring that outlet valve body 5 passes through internal setting when use 8 fixed lifting heads 3, enhance its stability, and the inside for exporting valve body 5 is equipped with spring 4, and one end of spring 4 is close to lifting head 3, and the other end of spring 4 and export the inner wall of valve body 5 and offset, outlet valve body 5 by external seal pad 11 and interior gasket 12 with One end of protecting crust 7 closely connects, and the one end for increasing its leakproofness, and exporting valve body 5 is fixed with safety cap 10.

When in use, the entrance valve body 1 of the utility model and outlet valve body 5 are connected by protecting crust 7, and entrance valve body 1 Lifting head 3 is set between outlet valve body 5, which can limit air-flow when in use, when low-pressure air current passes through, mention Dynamic head 3 cooperates spring 4 to adjust for minute-pressure environment, to guarantee entrance valve body 1 and export the normally-open of valve body 5 and close It closes, guarantees the normal use of check valve, so that the sensitivity of device is more preferable, increase the sensitivity of device with this.

It can to sum up obtain, the utility model passes through inlet porting valve body 1, the first screw thread 2, lifting head 3, spring 4, outlet valve body 5, fixture block 6, protecting crust 7, O-ring 8, the second screw thread 9, safety cap 10, external seal pad 11 and interior gasket 12, solve existing rank The check valve of section is not provided with sensitive low pressure regulating mechanism, cannot normally-open and its cost is high asks under low voltage situations Topic.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of low pressure check valve, including entrance valve body (1) and outlet valve body (5), it is characterised in that: the entrance valve body (1) It is fixedly connected between outlet valve body (5) by protecting crust (7), the entrance valve body (1) and the junction of outlet valve body (5) are set It is equipped with lifting head (3), the inside of outlet valve body (5) is equipped with spring (4), and one end of the spring (4) is close to lifting head (3), and the other end of spring (4) and the inner wall of outlet valve body (5) offset, and one end of outlet valve body (5) is fixed with safety Cap (10).

2. a kind of low pressure check valve according to claim 1, it is characterised in that: the entrance valve body (1) and protecting crust (7) Between by the first screw thread (2) connect, the protecting crust (7) with outlet valve body (5) between pass through the second screw thread (9) connect.

3. a kind of low pressure check valve according to claim 1, it is characterised in that: the outlet valve body (5) is set by inside The O-ring (8) set is fixed lifting head (3).

4. a kind of low pressure check valve according to claim 1, it is characterised in that: the inside of the entrance valve body (1) is arranged Have fixture block (6), and one end interval of fixture block (6) and outlet valve body (5) is arranged.

5. a kind of low pressure check valve according to claim 1, it is characterised in that: the outlet valve body (5) passes through external seal Pad (11) and interior gasket (12) are closely connect with one end of the protecting crust (7).