CN203090170U - Safety valve for medical equipment - Google Patents
Safety valve for medical equipment Download PDFInfo
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- CN203090170U CN203090170U CN 201320064598 CN201320064598U CN203090170U CN 203090170 U CN203090170 U CN 203090170U CN 201320064598 CN201320064598 CN 201320064598 CN 201320064598 U CN201320064598 U CN 201320064598U CN 203090170 U CN203090170 U CN 203090170U
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- valve
- push rod
- spring
- outer nut
- valve block
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Abstract
The utility model provides a safety valve for medical equipment, and particularly relates to the safety valve with an excess pressure valve value convenient and fast to adjust. The safety valve for the medical equipment is composed of a valve seat, a valve cap, an outer nut, a locking nut, a valve block, a mandril and a spring. The bottom end of the valve cap is fixedly connected with the valve seat in a sealing mode, and the inner cavity of the valve cap is communicated with an air flow channel inside the valve seat. The bottom end of the outer nut is fixedly connected with the top end of the valve cap in a sealing mode through threads. The valve block and the mandril are placed inside the inner cavity of the valve cap, the spring is arranged in the inner cavity of the valve cap and the outer nut, the top end of the spring abuts against the inner wall of the top end of the outer nut, the bottom end of the spring abuts against the bottom end face of the mandril, the valve block is placed between the bottom end of the mandril and the top end of the air flow channel of the valve seat, and the mandril is pressed and sealed at the upper end of the air flow channel of the valve seat in an abutting mode through the valve block under the pressure of the spring. The amount of advancing and retreating of the outer nut is adjusted, and the purpose of adjusting the excess pressure valve value is achieved.
Description
Technical field
This utility model relates to medical respiratory gas valve gear, relates in particular to the relief valve that a kind of medical apparatus and instruments that can regulate the overvoltage threshold values is used.
Background technology
In medical instruments field; an air pressure relief valve is all arranged in the respirator; as: utility model patent: the patent No. is 201120375968.4 " the excessive automatically gas relief valve of a kind of overvoltage protection "; applying date 2011.09.28; Granted publication CN20223675U; Granted publication day 2012.05.30 discloses a kind of respirator relief valve.Relief valve is used for detecting automatically and regulating stream pressure, in conjunction with shown in Figure 1, under the normal condition, under the tension force effect of spring 41, the cover 33 of pegging graft is pressed on gas channel 11 suitable for reading of valve seat 10 with valve block 40, the stream pressure when valve seat 10 in less than spring 41, peg graft and overlap 33 and the active force of valve block 40, when being predefined overvoltage threshold values, valve block 40 compresses the suitable for reading of gas channel 11, and passage is in sealing state, and air leakage hole 21 no gases overflow.The oxygen that air feed equipment produces end of air cavitys in the valve seat 10 reaches air cavity other end breathing apparatus in the valve seat with the patients eupnea; And when stream pressure during greater than the active force of spring 41, peg graft cover 33 and valve block 40; gas pressure overcomes spring 41 in the bottom of valve block 40, the active force of peg graft cover 33 and valve block 40; valve block 40 upwards lifts; part air-flow overflows from air leakage hole 21; stream pressure in the air cavity of valve seat 10 descends like this; after stream pressure diminishes; valve block 40 the suitable for reading of the gas channel 11 that is pressed on valve seat 10 again that under the active force of the spring 41 and the cover 33 of pegging graft, reset; guarantee that like this stream pressure can not surpass the force value of setting, protection patient's breathing safety.
This shows, because the overvoltage threshold values of relief valve mainly is to be provided with by the tension force at different springs 41.For requiring the different equipment that use air pressure, need to regulate different overvoltage threshold values, need to change spring 41 with different stress.Need the spring 41 of alternative multiple stress in the production process, debug process is comparatively loaded down with trivial details.In addition, equipment uses for a long time, and spring 41 has fatigue in various degree, and then can cause the deviant setting value of overvoltage threshold values set, the trouble free service that the equipment that makes can not be reliable and stable.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art, and a kind of relief valve that can convenient adjusting overvoltage threshold values is provided, and eliminates the deficiencies in the prior art, make in different occasions, and different environment is suitable for down.
Above-mentioned purpose of the present utility model is realized by following technical scheme:
A kind of relief valve that is used for medical apparatus and instruments is made up of interior valve seat 10 by gas channel 11, the valve gap 20 with several air leakage holes 21, outer nut 30, locking nut 31, valve block 42, push rod 40, spring 41.The bottom of described valve gap 20 is by screw thread and valve seat 10 fixed seal connections, and the inner chamber of valve gap 20 is communicated with gas channel 11 and air leakage hole 21 in the valve seat 10.The bottom of described outer nut 30 is by the top fixed seal connection of screw thread and valve gap 20, and the top perforate 32 of outer nut 30 is convenient to that push rod 40 is flexible, and described locking nut 31 is placed in the periphery of outer nut 30, is used to lock the threaded engagement of outer nut 30 and valve gap 20.Described valve block 42, push rod 40 are arranged in the inner chamber of valve gap 20, and described spring 41 is arranged in the inner chamber of valve gap 20 and outer nut 30; The top of spring 41 is pressed on the outer nut 30 vertical inwalls, and the bottom of spring 41 is pressed on the bottom face of push rod 40, and spring 41 forms tension force between this; Valve block 42 is between gas channel 11 tops of push rod 40 bottoms awl end and valve seat 10, and push rod 40 compresses gas channel 11 upper ends that are sealed in valve seat 10 by valve block 42 under the tension force effect of spring 41.
After adopting said structure, it is suitable for reading that this utility model utilizes the tension force of spring 41 to make push rod 40 bottoms press valve block 42 to be pressed on the gas channel 11 of valve seat 10, when the stream pressure in the gas channel 11 that comes from valve seat 10 during less than the combined effect power of spring 41, push rod 40 and valve block 42, valve block 42 is in gas channel 11 states of seal valve seat 10; And work as stream pressure greater than spring 41, during the combined effect power of push rod 40 and valve block 42, the bottom that stream pressure acts on valve block 42 overcomes spring 41, the combined effect power of push rod 40 and valve block 42, make valve block 42 upwards lift, thereby the air-flow in the valve seat 10 is overflowed through the air leakage hole 21 of valve gap 20 from the gas channel 11 of valve seat 10, reduced the stream pressure of valve seat 10 intracavity, after stream pressure diminishes, valve block 42 is at spring 41, again the gas channel 11 that is pressed on valve seat 10 under the combined effect power of push rod 40 and valve block 42 is suitable for reading, the gas channel 11 of seal valve seat 10 has guaranteed that like this stream pressure of gas channel 11 can not surpass the overvoltage threshold values of setting.The adjusting of overvoltage threshold values is by adjusting outer nut 30 collapsing lengths, thereby has regulated the tension force of spring 41, holds by the bottom awl of push rod 40 to be transmitted on the valve block 42.Shorten the length of outer nut 30, make spring 41 be compressed, increase the tension force of spring 41, improved the overvoltage threshold values; The length of elongation outer nut 30 makes spring 41 unfold, and has reduced the tension force of spring 41, has reduced the overvoltage threshold values.Locking nut 31 is used to lock the position of outer nut 30.
Advantage of the present utility model and effect provide a kind of relief valve that can conveniently regulate the overvoltage threshold values.
Description of drawings
Fig. 1 is the sectional structure chart of prior art relief valve.
Fig. 2 is a test connection layout of the present utility model.
Fig. 3 is a sectional structure chart of the present utility model.
Fig. 4 is the sketch map of this utility model push rod high scale.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment this utility model is described in further detail.
As shown in Figure 2, this utility model test connection layout.The relief valve 80 that is used for medical apparatus and instruments of the present utility model is installed in frock seat 81, and the gas channel 11 in the valve seat 10 communicates with frock seat inner chamber.One end of frock seat 81 is serially connected with left end snap joint 82, effusion meter 83 and source of the gas 84 successively; The other end of frock seat 81 is serially connected with right-hand member snap joint 82 and Pressure gauge 85 successively.The gas of source of the gas 84 is successively through effusion meter 83, left end snap joint 82, frock seat 81, right-hand member snap joint 82 and Pressure gauge 85.Relief valve 80 is installed in and is used to detect and control the gas pressure of frock seat 81 of flowing through on the frock seat 81.
As shown in Figure 3, a kind of relief valve that is used for medical apparatus and instruments is made up of interior valve seat 10 by gas channel 11, the valve gap 20 with several air leakage holes 21, outer nut 30, locking nut 31, valve block 42, push rod 40, spring 41.The bottom of described valve gap 20 is by screw thread and valve seat 10 fixed seal connections, and the gas channel 11 in the inner chamber of valve gap 20 and the valve seat 10 and the airflow connection of frock seat 81.The bottom of described outer nut 30 is by the top fixed seal connection of screw thread and valve gap 20, and the top perforate 32 of outer nut 30 when regulating overvoltage threshold values or relief valve operate as normal, is convenient to push rod 40 axial stretching motions up and down.For the ease of quantizing to regulate the overvoltage threshold values, can indicate scale 401 on push rod 40, scale 401 is a groove structure, is convenient to when push rod 40 moves up and down, can not produce obstruction power in CONTACT WITH FRICTION process with described outer nut (30) top perforate (32), level and smooth and smooth and easy.Described locking nut 31 is placed in the periphery of outer nut 30, is used to lock the threaded engagement of outer nut 30 and valve gap 20.Described valve block 42, push rod 40 are arranged in the inner chamber of valve gap 20, described spring 41 is arranged in the inner chamber of valve gap 20 and outer nut 30, the top of spring 41 is pressed on the outer nut 30 vertical inwalls, the bottom of spring 41 is pressed on the bottom face of push rod 40, spring 41 forms tension force between this, valve block 42 is between gas channel 11 tops of push rod 40 bottoms awl end and valve seat 10, and the awl end of push rod 40 bottoms compresses gas channel 11 upper ends that are sealed in valve seat 10 by the cone-shaped groove above the valve block 42 under the tension force effect of spring 41.Cone-shaped groove above the awl end of push rod 40 bottoms and the valve block 42 compresses and contacts, the form of this some contact the be more convenient for unlatching and the closure of valve block 42.For making the valve block 42 and gas channel 11 upper ends of valve seat 10 that better sealing effectiveness be arranged, the gas channel 11 upper end wall thickness of valve seat 10 are less, and the baseplane of valve block 42 must be ground smooth.Air leakage hole 21 general symmetries on the valve gap 20 are arranged, and are more steady when overflowing gas, generally can be 4 or 6.
After adopting said structure, this utility model utilizes the tension force of spring 41 to make push rod 40 bottoms awl end press valve block 42 to be pressed on gas channel 11 upper ends of valve seat 10, when the stream pressure in the gas channel 11 that comes from valve seat 10 during less than the combined effect power of spring 41, push rod 40 and valve block 42, valve block 42 is in gas channel 11 states of seal valve seat 10; And work as stream pressure greater than spring 41, during the combined effect power of push rod 40 and valve block 42, the bottom that stream pressure acts on valve block 42 overcomes spring 41, the combined effect power of push rod 40 and valve block 42, make valve block 42 upwards lift, thereby the air-flow in the valve seat 10 is overflowed through the air leakage hole 21 of valve gap 20 from the gas channel 11 of valve seat 10, reduced the stream pressure of valve seat 10 intracavity, after stream pressure diminishes, valve block 42 is at spring 41, again the gas channel 11 that is pressed on valve seat 10 under the combined effect power of push rod 40 and valve block 42 is suitable for reading, the gas channel 11 of seal valve seat 10 has guaranteed that like this stream pressure of gas channel 11 can not surpass the overvoltage threshold values of setting.The adjusting of overvoltage threshold values is by adjusting outer nut 30 collapsing lengths, thereby has regulated the tension force of spring 41, holds by the bottom awl of push rod 40 to be transmitted on the valve block 42.Shorten the length of outer nut 30, make spring 41 be compressed, increased the tension force of spring 41, improved the overvoltage threshold values; The length of elongation outer nut 30 makes spring 41 unfold, and has reduced the tension force of spring 41, has reduced the overvoltage threshold values.Locking nut 31 is used to lock the position of outer nut 30, avoids causing because of thread pitch the deviation of overvoltage threshold values.
Relief valve can be installed by the following method:
1, with 1200 order sand paper, adds little water, draw " 8 " word and firmly evenly grind gas channel 11 upper surfaces of valve seat 10 and the lower plane that valve block 42 is used for blanket gas circulation road 11.
2, with 400 order sand paper, repair and grind push rod 40 bottoms awl end, make its slick and sly no burr.
3, relief valve is installed: valve seat 10 lower end thread belts 705 fluid sealants are installed in it on frock seat 81.Two snap joints 82 about frock seat 81 two ends thread belts 705 fluid sealants respectively connect, the model of snap joint 82 is: PC0601.
4, finish assembly and install after, place the overvoltage threshold values that can test and set relief valve after 24 hours.
5, get 300ml/min effusion meter 83, one termination frock seats 81, another termination source of the gas 84, another termination Pressure gauge 85 of frock seat 81, Pressure gauge 85 parameters are: 60kPa.The adjusting admission pressure is: 0.05MPa, outer nut 30 is screwed in valve gap 20, and make outer nut 30 upper surfaces concordant with locking nut 31, even spring 41 forms maximum tension, effusion meter is closed in dextrorotation.
6, connect source of the gas 84, the knob of slowly regulating effusion meter 83 is observed Pressure gauge 85 readings simultaneously until least significant end.
If 7 Pressure gauges, 85 readings continue to rise to 50kPa, and effusion meter 83 readings are zero, show that then relief valve 80 good seals do not have leakage.Otherwise, show that there is leakage in relief valve 80, must grind again, install.
Can set the overvoltage threshold values of relief valve by the following method: (is example to set overvoltage threshold values 11.5kPa)
1, regulating source of the gas 84 pressure is: 11.5kPa, then Pressure gauge 85 readings are: 11.5kPa, effusion meter 83 readings are: 0.
2, slowly regulate outer nut 30, whether the reading of observing effusion meter 83 and Pressure gauge 85 changes.
If the reading of 3 Pressure gauges 85 is suddenly 0, and the float of effusion meter 83 shows that this moment, pressure at expulsion was: 11.5kPa when rising suddenly.
4, keep outer nut 30 positions, locking nut 31 dextrorotation are locked.The overvoltage threshold values of the relief valve of this moment is required setting: 11.5kPa.
This shows that relief valve of the present utility model as long as carry out simple adjustment outer nut 30, promptly can reach different overvoltage threshold values in the application scenario of different air-flow air pressure.As: in respirator, use, require setting overvoltage threshold air pressure to be: 11.5kPa.In anesthesiaing system, use, require setting overvoltage threshold air pressure to be: 8.0kPa.In positive airway pressure system, use, require setting overvoltage threshold air pressure to be: 2.0kPa.This relief valve highly versatile, it is convenient to regulate the overvoltage threshold values, need not to change any parts, has saved production cost greatly.
Further specify advantage of the present utility model and beneficial effect below:
1, single variety assembly adapts to multiple occasion, and equipment repair and maintenance need not to change assembly, reduces material stock, reduces enterprise and produces and maintenance cost.In the prior art, spring 41 is to be pressed between the inwall of the peg graft tube 34 and 33 two the parallel fixed distance of cover of pegging graft, and during this time apart from the tensile method of interior change spring 41, has only the spring 41 of changing different model.Just, the overvoltage threshold values of relief valve mainly is to be provided with by the tension force at different springs 41.For requiring to use different pneumatic compression devices, need to regulate different overvoltage threshold values, need to change spring 41 with differential tension.Need alternative multiple tensile spring 41 in the production process, debug process is comparatively loaded down with trivial details.In addition, equipment uses for a long time, and spring 41 has fatigue in various degree, and then the overvoltage threshold values that can cause having set departs from typical set value, the equipment that makes can not be reliable and stable trouble free service, make equipment return to normal operating conditions, have only the replacing parts.This utility model being provided with can regulating spring 41 between the structure of distance, be the distances of outer nut 30 vertical inwalls to the bottom face of push rod 40, thereby the relaxation degree of regulating spring 41 reaches the tension force that changes spring 41, and then has changed the purpose of overvoltage threshold values.
2, simple in structure, dependable performance, be convenient to processing.Compared with prior art, the spool part is grafting cover 33, the tube 34 of pegging graft, and valve block 42 and the grafting cover 33 I shape draw-in grooves that interlock, complex structure, and difficulty of processing is bigger, and reliability is lower.This utility model only has the unijunction member of push rod 40, has simplified internal structure greatly, has improved reliability and has been convenient to processing.
3, sensitivity is opened in overvoltage, has eliminated hysteresis phenomenon.In the prior art, the face contact that adopt on the last plane of valve block 42 is pegged graft and is overlapped 33, just the tension force of spring 41 is that plane, bottom surface by the cover 33 of pegging graft passes to the last planar of valve block 42, this structure is when air-flow has disturbance in gas channel 11, perhaps valve block 42 lower planes contact when having the processing technique error with the last planar sealing of gas channel 11, in the closing course hysteresis phenomenon is arranged after overvoltage unlatching and the pressure release, promptly the unlatching of valve block 42 and closure are sensitive inadequately.In this utility model, cone-shaped groove above the awl end of push rod 40 bottoms and the valve block 42 compresses and contacts, the contact of this point but not the form of face contact is more convenient for valve block 42 when being subjected to from gas channel 11 unbalanced and unsettled stream pressure, easier in certain direction jack-up and close up valve block 42 downwards in advance, improved overvoltage unlatching sensitivity greatly.
4, the overvoltage threshold values is more stable.In the prior art, on the assembling mode of the valve block 42 and the cover 33 of pegging graft, what valve block 42 necessarily adopted is the pliability material, as: the rubber material.Spring 41 is pressed on the cover 33 of pegging graft for a long time, feasible and cover 33 valve blocks that are assembled together 42 of pegging graft are pressed on the last plane of gas channel 11 for a long time, and the area of plane is less on the gas channel 11, be that contact surface is less, so can cause the lower plane depressed deformation of valve block 42, even produce bonding force.Can learn that from mechanics analysis pre-set overvoltage threshold values increases.In the present invention, valve block 42 adopts the hard material, as: plastics can also be duralumin material, copper material or the like, and valve seat 10 also adopts the hard material, and the two is pressed on together for a long time, and contact surface can not be out of shape.When the force value of gas channel 11 surpassed the overvoltage threshold values of setting, there was not any sluggish resistance in valve block 42 immediate unlocks, and promptly actual opening pressure value and setting overvoltage threshold values equate.Provable thus overvoltage threshold values is more reliable and more stable.
5, the scale 401 of push rod 40 design can be fast and regulate the overvoltage threshold values easily.General spring 41 is under same material, same size, same manufacturing condition, its physical parameter is unanimous on the whole, in the process of regulating the overvoltage threshold values, can be earlier according to scale 401 indications, coarse adjustment outer nut 30 positions, the scope of tentatively definite overvoltage threshold values, pass through the indication of effusion meter 83 and Pressure gauge 85 again, the overvoltage threshold values is accurately located in the position of accurate adjustment outer nut 30, thereby realizes regulating fast and easily the overvoltage threshold values.
Claims (5)
1. a relief valve that is used for medical apparatus and instruments has the valve seat (10) of gas channel (11), the valve gap (20) with several air leakage holes (21), outer nut (30), valve block (42), push rod (40), spring (41) to form by interior; The bottom of described valve gap (20) is communicated with gas channel (11) in the valve seat (10) by the inner chamber of screw thread and valve seat (10) fixed seal connection and valve gap (20); Described valve block (42), push rod (40) are arranged in the inner chamber of valve gap (20); Described spring (41) is arranged in the inner chamber of valve gap (20) and outer nut (30), and the top of spring (41) is pressed on the vertical inwall of outer nut (30), and the bottom of spring (41) is pressed on the bottom face of push rod (40); Valve block (42) is positioned between gas channel (11) top of push rod (40) bottom awl end and valve seat (10), and push rod (40) compresses gas channel (11) upper end that is sealed in valve seat (10) by valve block (42) under the tension force effect of spring (41);
It is characterized in that of the top fixed seal connection of the bottom of described outer nut (30) by screw thread and valve gap (20), the stroke of outer nut (30) in described valve gap (20) can be regulated, and it is flexible that the top of described outer nut (30) has perforate (32) to be convenient to push rod (40).
2. the relief valve that is used for medical apparatus and instruments according to claim 1, it is characterized in that also including locking nut (31), described locking nut (31) is placed in the periphery of outer nut (30), is used to lock the threaded engagement of outer nut (30) and valve gap (20).
3. the relief valve that is used for medical apparatus and instruments according to claim 1 and 2 is characterized in that: described push rod (40) is marked with scale (401), is used to indicate the stroke of push rod (40) outside outer nut (30) top perforate (32).
4. the relief valve that is used for medical apparatus and instruments according to claim 3, it is characterized in that: the scale (401) on the described push rod (40) is a groove structure, up and down during axially-movable, can not produce obstruction power at described push rod (40) in CONTACT WITH FRICTION process with described outer nut (30) top perforate (32).
5. the relief valve that is used for medical apparatus and instruments according to claim 1 and 2 is characterized in that: the cooperation that contacts of the top cone-shaped groove of the bottom of described push rod (40) awl end and valve block (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064598 CN203090170U (en) | 2012-10-15 | 2013-01-29 | Safety valve for medical equipment |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220525790 | 2012-10-15 | ||
| CN201220525790.1 | 2012-10-15 | ||
| CN 201320064598 CN203090170U (en) | 2012-10-15 | 2013-01-29 | Safety valve for medical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203090170U true CN203090170U (en) | 2013-07-31 |
Family
ID=48841618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320064598 Expired - Fee Related CN203090170U (en) | 2012-10-15 | 2013-01-29 | Safety valve for medical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203090170U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103083777A (en) * | 2012-10-15 | 2013-05-08 | 南京蓝泰医疗器械有限公司 | Safety valve used for medical instrument |
| WO2017005030A1 (en) * | 2015-07-06 | 2017-01-12 | 北京谊安医疗系统股份有限公司 | Ejector rod automatic alignment concentric device |
-
2013
- 2013-01-29 CN CN 201320064598 patent/CN203090170U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103083777A (en) * | 2012-10-15 | 2013-05-08 | 南京蓝泰医疗器械有限公司 | Safety valve used for medical instrument |
| WO2017005030A1 (en) * | 2015-07-06 | 2017-01-12 | 北京谊安医疗系统股份有限公司 | Ejector rod automatic alignment concentric device |
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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 |
Granted publication date: 20130731 Termination date: 20170129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |