CN206988491U - A kind of air-channel system of Pressure Relief Valve and medicine equipment - Google Patents

Abstract

The utility model provides the air-channel system of a kind of Pressure Relief Valve and medicine equipment, and Pressure Relief Valve includes：Valve body, the valve body have a first inner chamber opened up along the valve body bearing of trend and the air inlet and exhaust outlet that are connected with the first inner chamber；Valve element support member, bearing of trend of the valve element support member along the valve body are fixed in the first inner chamber；And valve element, it is connected between the valve element and the valve element support member by axis hole gap, and the valve element can slide along the bearing of trend of the valve body relative to the valve element support member, the valve element is used to block the air inlet or make to connect between the air inlet and the first inner chamber.Pressure Relief Valve provided by the utility model solves the problems, such as that control accuracy caused by being influenceed when the Pressure Relief Valve with valve element is horizontally mounted in the prior art due to the Action of Gravity Field of valve element is low.

Description

A kind of air-channel system of Pressure Relief Valve and medicine equipment

Technical field

The utility model belongs to the air-channel system of valve field, more particularly to a kind of Pressure Relief Valve and medicine equipment.

Background technology

Pressure Relief Valve is a kind of safety valve being installed on the parts such as pressure vessel or valve pipe, when pressure vessel or When the pressure value of valve pipe exceedes the numerical value of Pressure Relief Valve setting, the Pressure Relief Valve can be automatically turned on drainage pressure, Make the pressure in pressure vessel or valve pipe to continue to raise, ensure that the safety of pressure vessel or valve pipe.Work as pressure When pressure value in force container or valve pipe is down to certain numerical value, Pressure Relief Valve is closed automatically again.

In medicine equipment or other field, often use control pressure is smaller (to typically refer to control pressure in 10- In the range of 70mbar) Pressure Relief Valve, such as Anesthesia machine breathing circuit pressure security control, lung ventilator breathing circuit Pressure security control and rescue breathing equipment the field such as circuit pressure security control, due to the pressure releasing in these fields The control pressure of valve is smaller, therefore the requirement to control accuracy is higher.

At present, mainly pressure is controlled using spring Pressure Relief Valve.Spring Pressure Relief Valve typically has Spring and entity valve element, when the gas pressure value outside Pressure Relief Valve reaches certain numerical value, the gas meeting outside Pressure Relief Valve The entity valve element for acting on Pressure Relief Valve moves it, and makes spring-compressed, and the now movement of entity valve element causes pressure to let out Put valve to open, the gas outside Pressure Relief Valve is released from Pressure Relief Valve, so as to avoid the gas of the gas outside Pressure Relief Valve Pressure value is too high；When atmospheric pressure value is reduced to safety value, compression spring can recover deformation so that entity valve element is returned to initial position, Spring Pressure Relief Valve is closed.

When spring Pressure Relief Valve is horizontally mounted, because Action of Gravity Field of the entity valve element by itself is offset downward, Cause spring Pressure Relief Valve not to be turned on and off under the setting pressure of reality, the control of spring Pressure Relief Valve can be influenceed Precision processed, therefore, to ensure control accuracy, for the higher field of medicine equipment or other control accuracy requirements, prior art Middle spring Pressure Relief Valve when in use typically can only be vertically-mounted along gravity direction, makes entity valve element and spring along gravity Direction is set.However, vertically-mounted also bring some problems：On the one hand, for the Medical Devices that some volumes are limited, erect Straight installation causes spring Pressure Relief Valve to occupy more operating spaces；On the other hand, this also constrains spring pressure The use range of bleeder valve.

Utility model content

The purpose of this utility model is, there is provided a kind of Pressure Relief Valve, it is intended to solves Pressure Relief Valve in the prior art When being horizontally mounted due to control accuracy caused by the Action of Gravity Field of entity valve element it is low the problem of.

In order to solve the above technical problems, the utility model provides a kind of Pressure Relief Valve, including：Valve body, the valve body With a first inner chamber opened up along the valve body bearing of trend and the air inlet and exhaust outlet that are connected with the first inner chamber； Valve element support member, bearing of trend of the valve element support member along the valve body are fixed in the first inner chamber；And valve element, institute State and be connected between valve element and the valve element support member by axis hole gap, and the valve element can be along the extension side of the valve body Slided to relative to the valve element support member, the valve element is used to block the air inlet or makes the air inlet and described first Connected between inner chamber.

Further, the valve element support member has one to extend along the second inner chamber that direction opens up, and the one of the valve element Part is equipped with the second inner chamber by axis hole gap.

Further, the valve element has one to extend along the 3rd inner chamber that direction opens up, and the one of the valve element support member Part is equipped with the 3rd inner chamber by axis hole gap.

Further, the Pressure Relief Valve also includes flexible member, and the flexible member is arranged at the first inner chamber It is interior；When being slided when the valve element towards the direction away from the air inlet, the flexible member is compressed by the valve element, the air inlet Mouth between first inner chamber with connecting；When the flexible member recovers deformation, the valve element is in the presence of the flexible member Slided towards the direction of the close air inlet and block the air inlet.

Further, the valve body includes the first bonnet, valve casing and the second bonnet, one end of the valve casing and described first Bonnet is connected, and the other end of the valve casing is connected with second bonnet, and first bonnet, valve casing and the second bonnet enclose shape Into the first inner chamber, the air inlet is opened on second bonnet and connected with the first inner chamber, the exhaust outlet It is opened in the side wall of the valve casing and is connected with the first inner chamber.

Further, one end of first bonnet and the valve casing is detachably connected, second bonnet and the valve The other end of shell is detachably connected or integrated setting.

Further, the Pressure Relief Valve also includes the regulation of flexible member and the regulation deformation of elastic components amount Mechanism, the governor motion are connected through first bonnet and with the valve element support member；The flexible member is arranged at institute State in first inner chamber, the both ends of the flexible member are respectively arranged on the governor motion and the valve element, when the valve element When being slided towards the direction away from the air inlet, the flexible member is compressed by the valve element, the air inlet and first inner chamber Between connect；When the flexible member recovers deformation, the valve element enters in the presence of the flexible member towards described in Slide and block the air inlet in the direction of gas port.

Further, the flexible member is spring, and the spring housing is located on the valve element support member and the valve element, Its both ends is respectively arranged on the governor motion and the valve element.

Further, the valve element includes valve rod and is arranged at the bonnet of described valve rod one end, one of the valve rod Divide and be equipped with by axis hole gap in the second inner chamber, another part of the valve rod and the bonnet extend institute Second inner chamber is stated, the flexible member is sheathed on the valve element support member and the valve rod, and one end of the flexible member is set It is placed on the bonnet, the other end is arranged on the governor motion, and the bonnet is used to block the air inlet or made described Connected between air inlet and the first inner chamber.

Further, the valve casing has a connecting interface, the connecting interface two close to the end of second bonnet End connects with the first inner chamber and the air inlet respectively, and the bonnet is used to block the connecting interface or makes the connection Connected between interface and the first inner chamber.

Further, the interface of the first inner chamber and the connecting interface is provided with one first circular protrusion, described Bonnet is cylinder, and the diameter of first circular protrusion is more than the diameter of the connecting interface and is less than the straight of the bonnet Footpath, the bonnet are used in sealing contact or separate with first circular protrusion and do not contact with first circular protrusion.

Further, the governor motion includes adjustment portion and rotating part, and one end of the adjustment portion runs through described first Bonnet is installed on one end of the rotating part, and the other end of the rotating part is connected with the valve element support member, the rotating part The other end be provided with a groove to match with the flexible member, the other end of the flexible member is arranged at the groove In, the adjustment portion moves back and forth its axial direction along the valve body for adjusting the rotating part.

Further, the adjustment portion includes regulation damping ring and adjusting rod, and one end of the adjusting rod is through described the One bonnet is installed on one end of the rotating part, and the regulation damping ring is sheathed on the other end of the adjusting rod.

Further, the rotating part and the valve element support member integrated setting.

Further, the rotating part outer surface is provided with external screw thread, and the first inner chamber is close to the portion of first bonnet Divide and be more than the externally threaded length, the rotation with the internal thread to match with the external screw thread, the length of the internal thread Transfer part is connected with the valve body screw thread, and the adjustment portion is used for the rotation for adjusting the rotating part.

Further, the rotating part offers a hole, the shape of one end of the adjustment portion close to the part of its one end Shape and size and the shape and size of described hole, which match and run through first bonnet, to be arranged in described hole, the tune The one end in section portion is rotated for driving the rotating part to rotate.

Further, the shape of cross section of described hole is ellipse, regular polygon or irregular shape.

Further, the valve element uses the one or more in polytetrafluoroethylene (PTFE), nylon and polyformaldehyde to be mixed.

Further, it is micro- that the surface roughness Rz values on the surface that the valve element support member contacts with the valve element are less than 3.2 Rice.

Further, the gap width that the axis hole gap between the valve element and the valve element support member coordinates is 0- 0.15mm。

Further, the second inner chamber is stepped cylindrical body, and it is included along the valve body bearing of trend and away from institute State the 4th sub- inner chamber of air inlet and close to the 5th sub- inner chamber of the air inlet, the diameter of the 5th sub- inner chamber is more than described The diameter of 4th sub- inner chamber, a part for the valve element are equipped with the 4th sub- inner chamber and described by axis hole gap Intracavitary in five sons.

Further, intermediate location, the transition part are also included between the 5th sub- inner chamber and the 4th sub- inner chamber The diameter of position tapers into along the direction close to the 4th sub- inner chamber.

Further, the part of the 5th sub- inner chamber away from the 4th sub- inner chamber is provided with one second circular protrusion, institute The diameter for stating the second circular protrusion is equal to the diameter of the 4th sub- inner chamber.

Further, the outer surface of the valve element in the 5th sub- inner chamber is provided with one the 3rd circular protrusion, The diameter of 3rd circular protrusion is more than the diameter of second circular protrusion.

Further, second circular protrusion and/or the 3rd circular protrusion are flexible.

The utility model additionally provides a kind of air-channel system of medicine equipment, contains Pressure Relief Valve as described above, institute It is horizontal positioned to state Pressure Relief Valve.

Further, the medical instrument system is Anesthesia machine or lung ventilator.

Compared with prior art, the utility model provides the air-channel system of a kind of Pressure Relief Valve and medicine equipment, institute Pressure Relief Valve is stated by setting valve element support member, the Pressure Relief Valve with valve element is effectively solved and is being horizontally mounted process In the control accuracy caused by being influenceed by valve element gravity it is low the problem of, it is ensured that Pressure Relief Valve can be horizontally mounted, so It can be that user saves more operating spaces, and be horizontally mounted also so that the operational control of Pressure Relief Valve more meets typically Operating habit, in the medicine equipment or other field that may be applicable to high-precision control.

Secondly, valve element is using light weight and the material (such as polytetrafluoroethylene (PTFE)) with self-lubricity is made, and can further reduce Gravity influences, and improves the control accuracy of Pressure Relief Valve.

Furthermore the second inner chamber of valve element support member uses high bright and clean inner surface (surface roughness Rz values are less than 3.2 microns), The frictional force between valve element and second inner chamber can be further reduced, improves control essence of the Pressure Relief Valve when being horizontally mounted Degree.

In addition, the utility model also by setting governor motion, can quantify to the Opening pressure of Pressure Relief Valve Control.

Brief description of the drawings

Fig. 1 is a kind of structure sectional view schematic diagram for Pressure Relief Valve that the embodiment of the utility model one provides；

Fig. 2 is that a kind of rotating part for Pressure Relief Valve that the embodiment of the utility model one provides is integrated with valve element support member Structural representation during setting；

Fig. 3 is a kind of schematic appearance for Pressure Relief Valve that the embodiment of the utility model one provides；

Description of reference numerals：

1- valve bodies；2- valve element support members；3- valve elements；4- flexible members；5- governor motions；6- intake interfaces；In 10- first Chamber；101- internal threads；11- air inlets；12- exhaust outlets；The bonnets of 13- first；14- valve casings；141- connecting interfaces；The rings of 142- first Shape projection；The bonnets of 15- second；16- sealing rings；20- second inner chambers；The 4th sub- inner chambers of 201-；The 5th sub- inner chambers of 202-；203- mistakes Cross position；The circular protrusions of 204- second；The inner chambers of 30- the 3rd；31- bonnets；32- valve rods；The circular protrusions of 33- the 3rd；51- is adjusted Portion；511- adjusts damping ring；512- adjusting rods；52- rotating parts；521- grooves；522- external screw threads；523- holes.

Embodiment

Below in conjunction with the drawings and specific embodiments to the utility model proposes a kind of Pressure Relief Valve and medicine equipment Air-channel system is described in further detail.According to following explanation and claims, advantages and features of the present utility model will more It is clear.It should be noted that accompanying drawing uses using very simplified form and non-accurately ratio, only to convenient, apparent Ground aids in illustrating the purpose of the utility model embodiment.Same or analogous reference represents same or analogous portion in accompanying drawing Part.

Fig. 1 is a kind of schematic diagram for Pressure Relief Valve that the embodiment of the utility model one provides.Fig. 2 is the utility model one A kind of rotating part for Pressure Relief Valve that embodiment provides and structural representation during valve element support member integrated setting；Fig. 3 is A kind of schematic appearance for Pressure Relief Valve that the embodiment of the utility model one provides.Fig. 1 and Fig. 2 and Fig. 3 are refer to, it is a kind of Pressure Relief Valve, including valve body 1, valve element support member 2 and valve element 3；The valve body 1 has one to be opened along the bearing of trend of valve body 1 If first inner chamber 10 and the air inlet 11 and exhaust outlet 12 that are connected with the first inner chamber 10；The edge of valve element support member 2 The bearing of trend of the valve body 1 is fixed in the first inner chamber 10；Pass through between the valve element 3 and the valve element support member 2 Axis hole gap is connected, and the valve element 3 can slide along the bearing of trend of the valve body 1 relative to the valve element support member 2, The valve element 3 is used to block the air inlet 11 or make to connect between the air inlet 11 and the first inner chamber 10.In this reality Apply in example, the valve body is cylinder, and the air inlet 11 can be arranged at the one end of the valve body 1 vertically, the exhaust Mouthfuls 12 can be arranged on the valve body 1 in its axial side wall, and gas can enter described the from the exhaust outlet 12 One inner chamber 10, then flow out the first inner chamber 10 from the exhaust outlet 12.In another embodiment, the valve body 10 can also For other shapes, such as cube or hexagon cylinder etc..

In the present embodiment, it is connected between the valve element 3 and the valve element support member 2 for axis hole gap, both it Between have gap, the valve element support member 2 can support the valve element 3, enable extension side of the valve element 3 along the valve body 1 To placement, when the Pressure Relief Valve is horizontal positioned, you can realize that valve element 3 has the valve element support member 2 to carry horizontal positioned The support force of confession, the support force can offset influence of the gravity for valve element 3, avoid the valve element downward bias caused by gravity Move, be advantageous to improve control accuracy when Pressure Relief Valve is horizontally mounted.

Wherein, the axis hole gap between the valve element 3 and the valve element support member 2 is connected, and can be the valve element 3 The outside of the valve element support member 2 is socketed in, the valve element 3 has one to extend along the 3rd inner chamber 30 that direction opens up, described A part for valve element support member 2 is equipped with the 3rd inner chamber 30 by axis hole gap.As preferable or The valve element support member 2 is socketed in the outside of the valve element 3, and the valve element support member 2 has one to extend along what direction opened up Second inner chamber 20, a part for the valve element 3 are equipped with the second inner chamber 20 by axis hole gap.The present embodiment is excellent Choosing uses second scheme, and the valve element support member 2 is socketed in the outside of the valve element 3, and a part for so described valve element 3 can To be contained in valve element support member 2 so that the valve element support member 2 can preferably provide support to the valve element 3, reduce valve The gravity of core 3 itself influences.

The valve body 1 may include the first bonnet 13, the bonnet 15 of valve casing 14 and second, one end of the valve casing 14 and described the One bonnet 13 is connected, and the other end of the valve casing 14 is connected with second bonnet 15, first bonnet 13, valve casing 14 and Two bonnets 15 enclose to form the first inner chamber 10, and the air inlet 11 is opened on second bonnet 15 and with described first Inner chamber 10 connects, and the exhaust outlet 12 is opened in the side wall of the valve casing 14 and through the side wall of the valve casing 141, made described Exhaust outlet 12 connects with the first inner chamber 10.One end of first bonnet 13 and the valve casing 14 preferably detachably connects Connect, the other end of second bonnet 15 and the valve casing 14 is preferably detachably connected or integrated setting.Herein, the valve One end of shell 14 and the other end refer to both ends relative on the bearing of trend of valve casing 14.

It will be arranged to be detachably connected between valve casing 14 described in first bonnet 13, when the Pressure Relief Valve assembles When, first bonnet 13 is opened, after the component in the first inner chamber 10 is installed, you can connection first bonnet 13 With the valve casing 14.

The quantity of the exhaust outlet 12 may be configured as one or more, such as symmetrical two are set on the valve casing 14 Exhaust outlet 12 (i.e. two exhaust outlets 12 are distributed along the radial symmetric of valve casing 14), can make the gas in the first inner chamber 10 rapid Discharge, improve the sensitivity of Pressure Relief Valve.

In the present embodiment, can be connected by screw between second bonnet 15 and the valve casing 14, or It is detachably connected or integrated setting (i.e. the two be integrally formed), certainly, second bonnet 15 and the valve casing 14 Other modes can be used to connect, the utility model is not limited this.Preferably, second bonnet 15 and the valve casing 14 Between in addition to the position that the air inlet 11 connects with the first inner chamber 10, remainder is tightly connected, for example, by Set sealing ring 16 to be tightly connected to realize between second bonnet 15 and the valve casing 14, be so advantageous to prevent it is described enter The connecting portion of the gas of gas port 11 from second bonnet 15 and the valve casing 14 is spilt, and avoids influenceing the control of Pressure Relief Valve Precision processed.

In addition, one and institute can also be installed in the one end of second bonnet 15 away from the valve casing 14 in the present embodiment The intake interface 6 of the connection of air inlet 11 is stated, the purpose for setting the intake interface 6 is in order that ambient atmos pipeline easily leads to The intake interface 6 is crossed to install with Pressure Relief Valve.

In the present embodiment, the Pressure Relief Valve can also include a flexible member 4, and the flexible member 4 is arranged at In the first inner chamber 10.The flexible member 4 can be arranged on the periphery of the valve element 3, in the present embodiment, the elasticity member Part is set around the valve element 3, and both ends are respectively arranged on the valve element 3 and portion of the valve body 1 away from the air inlet 11 On point.

When being slided when the valve element 3 towards the direction away from the air inlet 11, the flexible member 4 is pressed by the valve element 3 Contract and moved with the valve element 3 towards the direction away from the air inlet 11, between the air inlet 11 and first inner chamber 10 Connection；When the flexible member 4 recovers deformation, the valve element 3 is in the presence of the flexible member 4 towards close to the air inlet Slide and block the air inlet 11 in the direction of mouth 11.The flexible member 4 can give the offer effect of valve element 3 when compressing Power, the active force are supplied to the pressure of the valve element 3 to offset with the gas at the air inlet 11, and limitation valve element 3 is unrestricted Towards away from air inlet 11 direction move；On the other hand, when the gas pressure at the air inlet 11 reduces, the elasticity Element 4 can recover deformation and provide thrust to the valve element 3, promote the valve element 3 to be reset to the closure air inlet 11.Another In one embodiment, the flexible member 4 can also be arranged between the valve element 3 and the air inlet 11, and its both ends is set respectively Put on the valve element 3 and the valve body is on the part of the air inlet 11.

With continued reference to shown in Fig. 1, the Pressure Relief Valve may also include the regulation machine for adjusting the deformation quantity of flexible member 4 Structure 5, the governor motion 5 are connected through first bonnet 13 and with the valve element support member 2.The flexible member 4 is distinguished It is arranged on the governor motion 5 and the valve element 3.When being slided when the valve element 3 towards the direction away from the air inlet 11, institute State flexible member 4 to be compressed by the valve element 3, connected between the air inlet 11 and first inner chamber 10；When the flexible member 4 is extensive During complex deformation, the valve element 3 slides towards the direction of the close air inlet 11 in the presence of the flexible member 4 and blocks institute Air inlet 11 is stated, makes to seal between the air inlet 11 and the first inner chamber 10 and does not connect.Wherein, the flexible member 4 Both ends can both be connected and fixed with the valve element 3 and the governor motion 5, can also only with the valve element 3 and described The contact of governor motion 5, which sets to be in, is not connected to fixed state.

The setting of adjustment structure 5 is the initial deformation amount for regulation elasticity element 4, can so be arranged as required to press The Opening pressure of power bleeder valve, for example, after it is compressed using the regulation elasticity element 4 of governor motion 5, flexible member 4 can court The valve element 3 is applied pressure to close to the direction of air inlet 11, so, only when the admission pressure of air inlet 11 is more than elasticity During the pressure that element 4 applies, the valve element 3 can just move towards the direction away from the air inlet 11, so that air inlet 11 Connected with the first inner chamber 10, because the first inner chamber 10 connects with exhaust outlet 12, gas will pass through the exhaust outlet 12 Discharge, so as to complete the work that Pressure Relief Valve opens gas of releasing, therefore, the effect of governor motion 5 is exactly to adjust The deformation quantity of flexible member 4, so as to set the Opening pressure of Pressure Relief Valve.

As a nonrestrictive example, the flexible member 4 can be spring, and the spring housing is located at the valve element On support member 2 and the valve element 3, its both ends is respectively arranged on the governor motion 5 and the valve element 3.Pressure with spring Power bleeder valve can be referred to as spring Pressure Relief Valve, and the spring Pressure Relief Valve in the present embodiment is provided with valve element support member 2, it can be achieved to be horizontally mounted and there is higher control accuracy.For pressure pilot-operated type relief valve, there is valve element Spring Pressure Relief Valve valve general structure it is compacter integrated, and can realize and be horizontally mounted, add such have it is real The advantage and use range of the Pressure Relief Valve of body valve element.

The valve element 3 may include valve rod 32 and be arranged on the bonnet 31 of described one end of valve rod 32.The one of the valve rod 32 Part is equipped with the second inner chamber 20 by axis hole gap, another part and the bonnet 31 of the valve rod 32 Extend the second inner chamber 20, the flexible member 4 (such as spring) is sheathed on the valve element support member 2 and the valve rod 32 On, one end of the flexible member 4 (such as spring) and it is arranged on the bonnet 31, can be connected with the bonnet 31, Setting can also be only contacted with the bonnet 31, contact, which is set, can equally enable the bonnet 31 to provide active force to institute Stating flexible member 4 makes its compression, and the other end is arranged on the governor motion 5, and the bonnet 31 is used to block the air inlet 11 or make to connect between the air inlet 11 and the first inner chamber 10.

The bonnet 31 be, for example, cylindrical-shaped structure, rectangular configuration or hexgonal structure, as long as can realize valve element 3 with The sealing of air inlet 11.The radial dimension of the bonnet 31 is more than the flexible member 4 (such as spring) and the air inlet 11 radial dimension, so that the flexible member 4 can contact with the bonnet 31, and enter in the bonnet 31 towards away from described in During the direction movement of gas port 11, the flexible member 4 can be compressed by the bonnet 31, meanwhile, in the bonnet 31 towards close During the direction movement of the air inlet 11, the bonnet 31 can block the air inlet 11 completely.It should be understood that valve element 3 is not Be only limitted to the structure of bonnet and valve rod, if valve element 3 can realize closure air inlet 31 and valve element 3 away from air inlet 31 make into Gas port 31 connects with the first inner chamber 10, such as, the valve element 3 can also be single cylindrical structural, its diameter More than the radial width of the air inlet 11, meanwhile, flexible member 4 (such as spring) is connected with the end of the valve element of cylinder, is made When cylindrical spool moves away from the air inlet 11, flexible member 4 can be compressed.

Preferably, the valve element 3 in the present embodiment can be hollow, to mitigate the overall weight of valve element 3, So that valve element 3 when horizontal positioned by gravity factor influenceed further reduction.

Fig. 1 is refer to, the valve casing 14 has a connecting interface 141, the company close to the end of second bonnet 15 The both ends of connection interface 141 connect with the first inner chamber 10 and the air inlet 11 respectively, and the bonnet 31 is used to block the company Connection interface 141 makes to connect between the connecting interface 141 and the first inner chamber 10.

Specifically, the size of bonnet 31 described in the present embodiment is more than the size of the connecting interface 141.When the valve Towards when being slided close to the direction of the air inlet 11, the bonnet 31 can cover bearing of trend (axial direction) of the core 3 along the valve body 1 Cover and block the connecting interface 141 and do not connected so that being sealed between the connecting interface 141 and the first inner chamber 10, from And cause the air inlet 11 also seals between the first inner chamber 10 not connect；When the bonnet 31 is towards away from the air inlet During the direction movement of mouth 11, connected between the connecting interface 141 and the first inner chamber 10, so as to also cause the air inlet Connected between 11 and the second inner chamber 10.

In the present embodiment, by setting connecting interface 141, can cause the valve casing 14 and second bonnet 15 it Between contact site become smaller, 31 need of bonnet of so described valve element 3 block i.e. salable after the connecting interface 141 The air inlet 11 and the first inner chamber 10, beneficial to the sealed connection between the valve casing 14 and second bonnet 15, prevent Only the gas of air inlet 11 is spilt from connecting portion.

Wherein, can be dashed forward on interface of the first inner chamber 10 with the connecting interface 141 provided with one first ring-type 142 are played, the diameter of first circular protrusion 142 is more than the diameter of the connecting interface 141 and less than the chi of the bonnet 31 Very little, when the bonnet 31 is cylinder, the diameter of first circular protrusion 142 is less than the diameter of the bonnet 31.It is described Bonnet 31 is used in sealing contact or separate with first circular protrusion 142 and do not contact with first circular protrusion 142.Set When the purpose of first circular protrusion 142 is in order that valve element 3 seals the connecting interface 141, valve element 3 only need to be with first ring Shape projection 142 is in sealing contact to be can be achieved to seal the connecting interface 141, reduces contact area, and further reinforcement is close Seal effect.

In the present embodiment, the governor motion 5 may include adjustment portion 51 and rotating part 52, and the adjustment portion 51 is used to adjust The rotating part 52 is so that its axial direction along the valve body 1 moves back and forth.Specifically, one end of the adjustment portion 51 is along valve One end for axially penetrating through first bonnet 13 and being installed on the rotating part 52 of body 1, the other end of the rotating part 52 and institute State valve element support member 2 to connect, the other end of the rotating part 52 is provided with a groove 521 to match with the flexible member 4, institute The other end for stating flexible member 4 is arranged in the groove 521.In the present embodiment by the advance of the rotating part 52 (i.e. to Moved close to the direction of air inlet 11) pressure is applied to the flexible member 4, realize the mesh for improving pressure releasing valve opening pressure , meanwhile, when the rotating part 52 is retreated and (moved to the direction away from air inlet 11), the flexible member 4 can be gradually extensive Complex deformation, realize the purpose for reducing pressure releasing valve opening pressure.

The adjustment portion 51 further may include to adjust damping ring 511 and adjusting rod 512, one end of the adjusting rod 512 One end of the rotating part 52 is installed on through first bonnet 13, the regulation damping ring set 511 is located at the adjusting rod On 512 other end.The regulation damping ring 511 is set, the Opening pressure of Pressure Relief Valve demarcation can be subjected to and shown Come, further facilitate the use of Pressure Relief Valve.

In the present embodiment, the rotating part 52 and the integrated setting of valve element support member 2, i.e., the two is to be integrally formed So that more compact structure.It should be noted that being not limited to integrated setting between rotating part 52 and the valve element support member 2, also may be used By by making the rotating part 52 be linked together with the valve element support member 2 in a manner of snapping connection, weld etc., for reality The existing rotating part 52 is synchronized with the movement with the valve element support member 2.

With reference to shown in Fig. 1 and Fig. 2, the outer surface of rotating part 52 is provided with external screw thread 522, and the first inner chamber 10 is close to institute The part for stating the first bonnet 13 is big with the internal thread 101 to match with the external screw thread 522, the length of the internal thread 101 In the length of the external screw thread 522, the rotating part 52 is threadedly coupled with the valve body 1, and the adjustment portion 51 is used to adjust institute Rotating part 52 is stated to rotate.When the adjustment portion 51 is used to adjusting the rotating part 52 and rotated, may be such that the external screw thread 522 with Matching is screwed or unscrewed between the internal thread 101, so as to realize that the rotating part 52 is straight on the axial direction of valve body 1 Line moves, because the groove 521 on the rotating part 52 contacts setting with the flexible member 4, therefore the rotating part 52 Linear motion can drive the flexible member 4 to compress or recover deformation.

Primary Reference Fig. 2, the rotating part 52 offer a hole 523, the adjustment portion 51 close to the part of its one end One end shape and size and the shape and size of described hole 523 match, one end of the adjustment portion 51 is through described First bonnet 13 enters in described hole 523, and one end of the adjustment portion 51 is rotated for driving the rotating part 52 to rotate.Institute The shape of cross section for stating hole 523 is preferably ellipse, regular polygon or irregular shape, by setting hole 523, and by institute State hole 523 cross section be arranged to it is non-circular, when the adjustment portion 51 rotates, due to described hole 523 shape limit, The rotation of adjustment portion 51 can drive the rotating part 52 to rotate.

In preferred scheme, the valve element 3 is using light weight and the material with self-lubricity is made.The quality of the valve element 3 is got over Small, it is influenceed smaller by gravity factor, during simultaneous with self-lubricity, can further reduce valve element 3 and the valve element support member 2 Between frictional force so that substantially reduced during valve core movement by External force interference factor, improve the control accuracy of Pressure Relief Valve. Typical light weight and material with self-lubricity feature is polytetrafluoroethylene (PTFE) (PTFE), nylon and polyformaldehyde (POM), can be used The valve element 3 is made in one or more combination in above-mentioned three kinds of materials, and the valve element 3 is preferably made of polytetrafluoroethylene (PTFE), Certainly, other known light weights also can be used and the valve element 3 is made in the material with self-lubricity.

Further, the surface roughness Rz values on the surface that the valve element support member 2 contacts with the valve element 3 are less than 3.2 Micron.The valve element support member 2 is arranged to high smooth finish surface with the surface that the valve element 3 contacts, can reduce the valve element 3 with Frictional force between it, further improve the control accuracy of Pressure Relief Valve.

The gap width that axis hole gap between the valve element 3 and the valve element support member 2 coordinates is 0-0.15mm.By gap Value is arranged on 0-0.15mm, on the basis of machining accuracy is ensured the valve element support member 2 can be enabled to support as far as possible The valve element 3, makes the keep level of valve element 3, reduce valve element 3 in motion process by gravity factor is influenceed, improve and press The control accuracy of power bleeder valve.

Further, the second inner chamber 20 is preferably stepped cylindrical body, and it is included along the valve body bearing of trend simultaneously 5th sub- inner chamber 202 of the 4th sub- inner chamber 201 and close air inlet 11 away from the air inlet 11, the 5th sub- inner chamber 202 diameter is more than the diameter of the described 4th sub- inner chamber 201, the part of the valve element 3 by axis hole gap be equipped with In the 4th sub- inner chamber 201 and the 5th sub- inner chamber 202.The second inner chamber 20 is arranged to two parts, and it is described The diameter of 5th sub- inner chamber 202 is more than the diameter of the described 4th sub- inner chamber 201, is to further reduce the valve element 3 and institute The contact area between second inner chamber 20 is stated, the valve element 3 being arranged in the second inner chamber 20 divide into two parts, one Divide and be located in the described 4th sub- inner chamber 201 and be in contact with it, the 4th sub- inner chamber 201 supports the valve element 3, another part position In the described 5th sub- inner chamber 202, but by the diameter of the described 5th sub- inner chamber 202 is more than the described 4th sub- inner chamber 201 and institute The diameter of valve element 3 is stated, therefore this part valve element in the described 5th sub- inner chamber 202 is in vacant state, reduces the valve Contact area between core 3 and the second inner chamber 20, so as to reduce the friction between the valve element 3 and the second inner chamber 20 Power, improve the control accuracy of Pressure Relief Valve.

In preferred scheme, also include intermediate location 203 between the 5th sub- inner chamber 202 and the 4th sub- inner chamber 201, The diameter of the intermediate location 203 tapers into along the direction close to the described 4th sub- inner chamber 201.The presence of intermediate location 203 Be in order that interface between the 5th sub- inner chamber 202 and the 4th sub- inner chamber 201 is more smooth, prevent the valve By excessive drag effects when the end of core 3 touches the intermediate location 203 in motion process.

Wherein, the described 5th part of the sub- inner chamber 202 away from the described 4th sub- inner chamber 201 is provided with one second circular protrusion 204, the diameter of second circular protrusion 204 is equal to the diameter of the described 4th sub- inner chamber 201.Second circular protrusion 204 Effect be and the described 4th sub- inner chamber 201 coordinates and supports the valve element 3 so that the valve element portion in the second inner chamber 20 There is support at the both ends divided.

In the present embodiment, the outer surface of the valve element 3 in the described 5th sub- inner chamber 202 is provided with one and described the The 3rd circular protrusion 33 that one annular projection 204 matches, the diameter of the 3rd circular protrusion 33 are more than second ring-type The diameter of projection 204.The effect of 3rd circular protrusion 33 is the valve element 3 to be carried out spacing, prevents the 3rd ring-type Projection 33 deviates from the described 5th sub- inner chamber 202, so as to control the valve element 3 to be moved to close to the direction of air inlet 11 Distance, prevent the valve element 3 from deviating from the described 5th sub- inner chamber 202.

With reference to Fig. 1 and Fig. 2, second circular protrusion 204 and/or the 3rd circular protrusion 33 use elastomeric material system Into.One or two in both is arranged into elastomeric material to be made, can conveniently when mounted, by the 3rd circular protrusion 33 squeeze into the 4th sub- inner chamber via second circular protrusion 204.

The utility model additionally provides a kind of air-channel system of medicine equipment, contains Pressure Relief Valve as described above, institute It is horizontal positioned to state Pressure Relief Valve.Wherein, the medical instrument system is preferably Anesthesia machine or lung ventilator.

In summary, the utility model provides a kind of Pressure Relief Valve, effective to solve by setting valve element support member Have the Pressure Relief Valve of valve element in the control accuracy caused by being influenceed by valve element gravity during being horizontally mounted low Problem, it is ensured that Pressure Relief Valve can be horizontally mounted, and so can be that user saves more operating spaces, and be horizontally mounted Also so that the operational control of Pressure Relief Valve more meets in general operating habit, it may be applicable to the Medical treatment device of high-precision control In tool or other field.

Secondly, valve element is using light weight and the material with self-lubricity is made, and can further reduce gravity influence, improve pressure The control accuracy of power bleeder valve.

Furthermore the surface that valve element support member contacts with valve element uses high smooth finish surface, can further reduce valve element and valve element Frictional force between support member, improve control accuracy of the Pressure Relief Valve when being horizontally mounted.

In addition, the utility model also by setting governor motion, can quantify to the Opening pressure of Pressure Relief Valve Control.

Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the scope of the utility model Calmly, any change, the modification that the those of ordinary skill in the utility model field does according to the disclosure above content, belonging to right will Seek the protection domain of book.

Claims (27)

1. A kind of 1. Pressure Relief Valve, it is characterised in that including：

   Valve body, the valve body have a first inner chamber opened up along the valve body bearing of trend and connected with the first inner chamber Air inlet and exhaust outlet；

   Valve element support member, bearing of trend of the valve element support member along the valve body are fixed in the first inner chamber；And

   Valve element, it is connected between the valve element and the valve element support member by axis hole gap, and the valve element can be along described The bearing of trend of valve body slides relative to the valve element support member, and the valve element is used to block the air inlet or makes the air inlet Mouth between the first inner chamber with connecting.
2. 2. a kind of Pressure Relief Valve according to claim 1, it is characterised in that the valve element support member has one to prolong along it The second inner chamber that direction opens up is stretched, a part for the valve element is equipped with the second inner chamber by axis hole gap.
3. 3. a kind of Pressure Relief Valve according to claim 1, it is characterised in that the valve element has one to extend along direction The 3rd inner chamber opened up, a part for the valve element support member are equipped with the 3rd inner chamber by axis hole gap.
4. 4. a kind of Pressure Relief Valve according to claim 2, it is characterised in that also including flexible member, the elasticity member Part is arranged in the first inner chamber；When being slided when the valve element towards the direction away from the air inlet, the flexible member quilt The valve element compression, is connected between the air inlet and first inner chamber；When the flexible member recovers deformation, the valve element exists Slided in the presence of the flexible member towards the direction of the close air inlet and block the air inlet.
5. 5. a kind of Pressure Relief Valve according to claim 2, it is characterised in that the valve body includes the first bonnet, valve casing With the second bonnet, one end of the valve casing is connected with first bonnet, and the other end of the valve casing connects with second bonnet Connect, first bonnet, valve casing and the second bonnet enclose to form the first inner chamber, and the air inlet is opened in second valve Cover and connected with the first inner chamber, the exhaust outlet is opened in the side wall of the valve casing and connected with the first inner chamber It is logical.
6. A kind of 6. Pressure Relief Valve according to claim 5, it is characterised in that first bonnet and the one of the valve casing End is detachably connected, and the other end of second bonnet and the valve casing is detachably connected or integrated setting.
7. 7. a kind of Pressure Relief Valve according to claim 5, it is characterised in that also including described in flexible member and regulation The governor motion of deformation of elastic components amount, the governor motion are connected through first bonnet and with the valve element support member； The flexible member is arranged in the first inner chamber, and the both ends of the flexible member are respectively arranged at the governor motion and institute State on valve element, when being slided when the valve element towards the direction away from the air inlet, the flexible member is compressed by the valve element, institute State and connected between air inlet and first inner chamber；When the flexible member recovers deformation, the valve element is in the flexible member Slided under effect towards the direction of the close air inlet and block the air inlet.
8. 8. a kind of Pressure Relief Valve according to claim 7, it is characterised in that the flexible member is spring, the bullet Spring is sheathed on the valve element support member and the valve element, and its both ends is respectively arranged on the governor motion and the valve element.
9. 9. a kind of Pressure Relief Valve according to claim 8, it is characterised in that the valve element includes valve rod and is arranged at The bonnet of described valve rod one end, the part of the valve rod is equipped with the second inner chamber by axis hole gap, described Another part of valve rod and the bonnet extend the second inner chamber, and the flexible member is sheathed on the valve element support member On the valve rod, one end of the flexible member is arranged on the bonnet, and the other end is arranged on the governor motion, institute Bonnet is stated to be used to block the air inlet or make to connect between the air inlet and the first inner chamber.
10. 10. a kind of Pressure Relief Valve according to claim 9, it is characterised in that the valve casing is close to second bonnet End there is a connecting interface, the connecting interface both ends connect with the first inner chamber and the air inlet respectively, described Bonnet is used to block the connecting interface or make to connect between the connecting interface and the first inner chamber.
11. 11. a kind of Pressure Relief Valve according to claim 10, it is characterised in that the first inner chamber connects with described The interface of mouth is provided with one first circular protrusion, and the bonnet is cylinder, and the diameter of first circular protrusion is more than institute State the diameter of connecting interface and less than the bonnet diameter, the bonnet be used for first circular protrusion it is in sealing contact or Separate with first circular protrusion and do not contact.
12. A kind of 12. Pressure Relief Valve according to claim 8, it is characterised in that the governor motion include adjustment portion and Rotating part, one end of the adjustment portion are installed on one end of the rotating part through first bonnet, the rotating part it is another One end is connected with the valve element support member, and the other end of the rotating part is provided with a groove to match with the flexible member, The other end of the flexible member is arranged in the groove, and the adjustment portion makes it along the valve for adjusting the rotating part The axial direction of body moves back and forth.
13. 13. a kind of Pressure Relief Valve according to claim 12, it is characterised in that the adjustment portion includes regulation damping ring And adjusting rod, one end of the adjusting rod are installed on one end of the rotating part, the regulation damping through first bonnet Ring set is on the other end of the adjusting rod.
14. 14. a kind of Pressure Relief Valve according to claim 12, it is characterised in that the rotating part supports with the valve element Part integrated setting.
15. 15. a kind of Pressure Relief Valve according to claim 12, it is characterised in that the rotating part outer surface is provided with outer spiral shell Line, the first inner chamber have the internal thread to match with the external screw thread, the interior spiral shell close to the part of first bonnet The length of line is more than the externally threaded length, and the rotating part is connected with the valve body screw thread, and the adjustment portion is used to adjust The rotation of the rotating part.
16. 16. a kind of Pressure Relief Valve according to claim 15, it is characterised in that the rotating part is close to the portion of its one end A hole is separately provided with, the shape and size of one end of the adjustment portion and the shape and size of described hole match and run through First bonnet is arranged in described hole, and one end of the adjustment portion is rotated for driving the rotating part to rotate.
17. 17. a kind of Pressure Relief Valve according to claim 16, it is characterised in that the shape of cross section of described hole is ellipse Circular, regular polygon or irregular shape.
18. 18. a kind of Pressure Relief Valve according to claim 1, it is characterised in that the valve element is using polytetrafluoroethylene (PTFE), Buddhist nun One or more in dragon and polyformaldehyde are mixed.
19. 19. a kind of Pressure Relief Valve according to claim 1, it is characterised in that the valve element support member and the valve element The surface roughness Rz values on the surface of contact are less than 3.2 microns.
20. 20. a kind of Pressure Relief Valve according to claim 1, it is characterised in that the valve element and the valve element support member Between axis hole gap coordinate gap width be 0-0.15mm.
21. 21. a kind of Pressure Relief Valve according to claim 2, it is characterised in that the second inner chamber is stepped cylindrical Body, it includes along the valve body bearing of trend and the 4th sub- inner chamber away from the air inlet and the 5th close to the air inlet Sub- inner chamber, the diameter of the 5th sub- inner chamber are more than the diameter of the 4th sub- inner chamber, and a part for the valve element passes through axis hole Gap is equipped with intracavitary in the 4th sub- inner chamber and the 5th son.
22. A kind of 22. Pressure Relief Valve according to claim 21, it is characterised in that the 5th sub- inner chamber and the described 4th Also include intermediate location between sub- inner chamber, the diameter of the intermediate location gradually becomes along the direction close to the 4th sub- inner chamber It is small.
23. 23. a kind of Pressure Relief Valve according to claim 21, it is characterised in that the 5th sub- inner chamber is away from described The part of four sub- inner chambers is provided with one second circular protrusion, and the diameter of second circular protrusion is equal to the straight of the 4th sub- inner chamber Footpath.
24. A kind of 24. Pressure Relief Valve according to claim 23, it is characterised in that the institute in the 5th sub- inner chamber The outer surface for stating valve element is provided with one the 3rd circular protrusion, and the diameter of the 3rd circular protrusion is more than second circular protrusion Diameter.
25. 25. a kind of Pressure Relief Valve according to claim 24, it is characterised in that second circular protrusion and/or institute It is flexible to state the 3rd circular protrusion.
26. 26. a kind of air-channel system of medicine equipment, contain the Pressure Relief Valve as described in claim any one of 1-25, the pressure Power bleeder valve is horizontal positioned.
27. A kind of 27. air-channel system of medicine equipment according to claim 26, it is characterised in that the medical instrument system For Anesthesia machine or lung ventilator.