CN208678053U - Positive pressure is sustained connector - Google Patents
Positive pressure is sustained connector Download PDFInfo
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- CN208678053U CN208678053U CN201820406180.7U CN201820406180U CN208678053U CN 208678053 U CN208678053 U CN 208678053U CN 201820406180 U CN201820406180 U CN 201820406180U CN 208678053 U CN208678053 U CN 208678053U
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- perfusion tube
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Abstract
The positive pressure of the utility model is sustained connector, including hollow shell, piston and perfusion tube, one end of shell is infusion end, liquid storage chamber is surrounded between piston and infusion end, atmospheric pressure cavity is surrounded between piston and the other end of shell, shell offers air inlet, and positive pressing spring is equipped in atmospheric pressure cavity, and shell is equipped with locating part；Perfusion tube is pushed to wear to liquid storage chamber, to form infusion channel " perfusion tube-liquid storage chamber-infusion end "；Perfusion tube bounces back in piston, separates infusion channel, forms micro- bleed-through road " liquid storage chamber-infusion end "；After locating part is released to the limit of piston, positive pressing spring pushes piston to gradually reduce liquid storage chamber, and determines the push-in stroke that power controls piston by the air inflow of quantitative control air inlet.By the quantitative air inlet of air inlet, changes the pressure difference between atmospheric pressure cavity and the external world to realize the span of positive pressing spring, the push-in stroke of piston can be accurately controlled, eliminate micro- infiltration fibre columns of traditional jointing, micro- infiltration of the connector is not influenced by liquor strength.
Description
Technical field
The utility model relates to the field of medical instrument technology, and in particular to positive pressure is sustained connector.
Background technique
With the continuous improvement of nursing technique, the continuous renewal of medical supplies, remaining needle is by world health organisation recommendations
For safest Centesis instrument.It is easy to operate, can reduce and puncture, protects blood vessel and mitigate patient's pain repeatedly, facilitate clinic
Medication and emergency rescue alleviate workload of the nurse, have been widely used in clinic.Venous detaining needle goes out again in clinical position
Some new problems are showed, after each infused, if directly pulling out needle tubing or conehead or infusion apparatus from indwelling instrument
Female Luer will form a cavity, lead to negative pressure, blood backflow is caused to enter in indwelling instrument, forms thrombus blocking, causes
Indwelling instrument is scrapped.Therefore positive pressure connector is often used to prevent blood backflow from blocking, such as Patent No. 201710283803.6
Patent disclose a kind of continuous positive pressure connector, liquid storage chamber is compressed by positive pressing spring, thus formed successively pass through " liquid storage
Micro- bleed-through road of the micro- infiltration device-column channel-delivery outlet of chamber-".Micro- infiltration device is provided with sepage fibre columns, the leaching rate of liquid
It is controlled by sepage fibre columns and the thrust of positive pressing spring, however speed when medical fluid is by sepage fibre columns will receive medicine
The concentration of liquid influences, and big concentration liquid is more many slowly than small concentration liquid by the speed of sepage fibre columns or even sepage limits
Position column can be blocked by big concentration liquid, in addition the pressure of positive pressing spring is not easy to control, so will lead to actual sepage speed with
There are gaps between the parameter of budget, reduce positive pressure anti-return effect.
Utility model content
For the prior art there are above-mentioned technical problem, the utility model provides a kind of sepage speed not by liquor strength shadow
It rings, improves the micro- positive pressure for seeping anti-return effect of positive pressure and be sustained connector.
To achieve the above object, the utility model the following technical schemes are provided:
Offer positive pressure sustained release connector, the piston including hollow shell and the inside that shell is arranged in, piston and shell
It being sealed between inner wall, shell is equipped with liquid storage chamber, and liquid storage chamber is located at the forward end of piston, and liquid storage chamber is connected to liquid outlet,
Under original state, inlet is not connected to liquid storage chamber, after by external operation inlet be connected to liquid storage chamber, thus formed into
This infusion channel of liquid mouth-liquid storage chamber-liquid outlet, into transfusion state；
Under transfusion state, piston is because positive mobile without energy by limit, and by external operation triggering, first aspect inlet is not
It is connected to liquid storage chamber again, second aspect releases the limit to piston, and piston is able to forward direction and moves into micro- infiltration state；
Under micro- infiltration state, the space in the mobile compression liquid storage chamber of piston forward direction makes to form positive pressure to liquid outlet direction
Medical fluid goes out from the micro- infiltration of liquid outlet；
Equipped with atmospheric pressure cavity, it is located at the other end of piston；
Equipped with quantitative gas input unit --- under transfusion state, triggered by external operation, quantitative gas input unit handle
Quantitative gas is input to atmospheric pressure cavity, so that the gas in atmospheric pressure cavity applies air pressure to piston under micro- infiltration state.
Specifically, realizing connection between inlet and liquid storage chamber by perfusion tube, perfusion tube is arranged in piston, specifically:
The entrance of perfusion tube corresponds to inlet；
Under original state, the outlet of perfusion tube is not connected to liquid storage chamber because being blocked by piston, perfusion tube after by external operation
Outlet forward direction be moved to and no longer blocked by piston to being connected to liquid storage chamber；
Under transfusion state, by external operation trigger first aspect specifically, the outlet reset of perfusion tube or second party
Face piston forward direction is mobile, the outlet of perfusion tube thus blocked no longer to be connected to liquid storage chamber by piston；
Under micro- infiltration state, the outlet of perfusion tube is positive mobile together by piston driving.
Specifically, limit suffered by piston is realized by limit switch, limit switch clasps piston to be formed to piston
Limit, limit switch are not clasped piston then by external operation rotation to release the limit to piston.
Specifically, piston is provided with grab compatible with limit switch, shell is provided with mounting hole, and limit switch can turn
It is arranged in mounting hole dynamicly, is sealed between limit switch and mounting hole, is sealed between limit switch and perfusion tube.
Specifically, the shell is provided with the structure for preventing piston rotation.
Piston is made to generate positive mobile trend specifically, being equipped with positive pressing spring and bestowing positive elastic force to piston.
Specifically, the quantitative gas input unit is to be opened in shell and be connected to the extraneous air inlet with atmospheric pressure cavity.
Specifically, the air inlet is connected with air pump, thus the gas flow that control is input in atmospheric pressure cavity.
Specifically, the outlet reset of perfusion tube is achieved in that and bestows reversed elastic force to perfusion tube equipped with reset spring
So that the outlet of the perfusion tube is moved backward to by piston and is blocked.
Specifically, being equipped with the changeover portion interlocked with piston reciprocating；
Connection is realized by passing through the perfusion tube of piston between liquid storage chamber and liquid outlet, wherein the entrance of perfusion tube is corresponding
The outlet of liquid storage chamber, perfusion tube corresponds to liquid outlet；
Under original state, changeover portion is got lodged between inlet and liquid storage chamber, so that inlet is not connected to liquid storage chamber, by external
Changeover portion, which is got out of the way, after operation makes inlet be connected to liquid storage chamber, to form inlet-liquid storage chamber-perfusion tube-liquid outlet, this is defeated
Liquid channel, into transfusion state；
Under transfusion state, piston cannot be positive mobile due to being limited by changeover portion, is triggered by the external operation, changeover portion
It resets, first aspect, which is got lodged in again between inlet and liquid storage chamber, makes inlet no longer be connected to liquid storage chamber, and second aspect releases
Limit to piston, piston are able to forward direction and move into micro- infiltration state.
The utility model has the beneficial effects that
The positive pressure of the utility model is sustained connector, compared with prior art, the utility model by air inlet it is quantitative into
Gas, i.e., controllable air inflow can more be accurately controlled piston to quantitatively change the pressure difference between atmospheric pressure cavity and the external world
Push-in stroke and fltting speed.And micro- infiltration fibre columns of traditional jointing are eliminated, therefore micro- infiltration of the connector is not dense by medical fluid
The influence of degree.In addition, the upper end that perfusion tube is bounces back in piston, therefore perfusion tube prevents take up under sepage state
The space in the space of liquid storage chamber, entire liquid storage chamber can accommodate medical fluid, therefore liquid storage amount is big, and positive pressure micro- infiltration duration is long.
Detailed description of the invention
Fig. 1 is that the positive pressure in embodiment is sustained the structural schematic diagram of connector in the first operative state.
Fig. 2 is that the positive pressure in embodiment is sustained the structural schematic diagram of connector in a second operative state.
Fig. 3 is that the positive pressure in embodiment is sustained structural schematic diagram of the connector under third working condition.
Fig. 4 is that the positive pressure in another embodiment is sustained the structural schematic diagram of connector in the first operative state.
Fig. 5 is that the positive pressure in another embodiment is sustained the structural schematic diagram of connector in a second operative state.
Fig. 1 is to Fig. 3 appended drawing reference:
Shell 1, liquid storage chamber 11, atmospheric pressure cavity 12, air inlet 13；
Screwed union 2；
Connecting bracket 3；
Positive pressing spring 4；
Reset spring 5；
Limit switch 6, the second sealing ring 61, third sealing ring 62；
Piston 7, the first sealing ring 71, grab 72, pit 73；
Perfusion tube 8, the 4th sealing ring 81, fluid hole 82；
External lug 9.
The appended drawing reference of Fig. 4 and Fig. 5:
Shell 10, seal section 101, active segment 102, liquid storage chamber 103, atmospheric pressure cavity 104, venthole 105, air inlet 106；
Lower connecting base 11, delivery outlet 111；
Perfusion tube 12；
Piston 13, body section 131, changeover portion 132, through hole 133, upper seal 134, lower seal 135；
Positive pressing spring 14；
Helmet 15；
External connector 16.
Specific embodiment
The utility model is described in detail below in conjunction with specific embodiments and drawings.
The positive pressure of the present embodiment is sustained connector, as shown in Fig. 2, including hollow shell 1, the inside that shell 1 is arranged in
Piston 7 and the perfusion tube 8 for being actively located in piston 7, perfusion tube 8 are hard rod-like structure, and the outside setting of piston 7 is fluted,
The first sealing ring 71 is provided in groove, for sealing between piston 7 and the inner wall of shell 1.There is connecting bracket in the upper end of shell 1
3 for being inserted into external lug 9, and the connection of 9 upper end of external connector provides the peripheral unit of medical fluid, the connection infusion of 9 lower end of external lug
Pipe 8.It is liquid that the lower end of shell 1, which is provided with screwed union 2 for connecting the peripheral infusion apparatus of such as remaining needle etc, the end,
End, surrounds liquid storage chamber 11, atmospheric pressure cavity 12, atmospheric pressure cavity 12 is surrounded between piston 7 and the upper end of shell 1 between piston 7 and outlet end
It is inside provided with positive pressing spring 4, positive pressing spring 4 is downwardly applied to thrust to piston 7, and positive pressing spring 4 can be changed to other with elasticity
The elastic component of thrust.The direction for compressing liquid storage chamber 11 is forward direction, and the present embodiment downwardly direction is forward direction.As shown in Figure 1, shell
There is mounting hole in 1 lower end, and mounting hole is equipped with rotatable limit switch 6, and piston 7 is provided with compatible with limit switch 6
Grab 72, the grab 72 that limit switch 6 hooks piston 7 carry out limiting that piston 7 is hindered not pushed down on by positive pressing spring 4,
The outside of limit switch 6 is provided with the second sealing ring 61 and is sealed between limit switch 6 and mounting hole with realizing, limit switch 6
Inside is provided with third sealing ring 62 and is sealed between limit switch 6 and perfusion tube 8 with realizing, rotary spacing switch 6 can make to limit
Bit switch 6 separates to release the limit to piston 7 with grab 72.Shell 1 is provided with the structure for preventing piston 7 from rotating
(not shown), effect are to rotate piston 7 with limit switch 6, allow limit switch 6 to be smoothly staggered with grab 72 and separate.
In practice, limit switch 6 can change other locating parts such as push button into, if can be realized the fixation to piston 7 with separate
?.
Piston 7 is provided with pit 73, and the side wall of the upper end of perfusion tube 8 offers fluid hole 82, fluid hole 82 it is upper
Side and lower section are provided with the 4th sealing ring 81.Atmospheric pressure cavity 12 is equipped with reset spring 5, and 5 one end of reset spring resists perfusion tube 8,
The other end resists piston 7, and external force operates external connector 9, after releasing to the thrust of perfusion tube 8, the 4th under the effect of reset spring 5
In 81 automatic retracted of sealing ring to the pit 73 of piston 7, form structure as shown in Figure 2, under this state the 4th sealing ring 81 with
It is sealed between 73 inner wall of pit, so that separating between fluid hole 82 and liquid storage chamber 11.Since the upper end that perfusion tube 8 is is back
It is reduced in piston 7, therefore perfusion tube 8 prevents take up the space of liquid storage chamber 11, the space between 7 bottom of piston and screwed union 2
Medical fluid can be accommodated, therefore liquid storage amount is big, positive pressure micro- infiltration duration is long.In practice, piston 7 can not also open up pit
73, as long as under the effect of reset spring 5, fluid hole 82 can be tightly against piston 7 fluid hole 82 towards the bottom surface of piston 7
Bottom surface to separating infusion channel.In use, making perfusion tube 8 as shown in Figure 1, push down on perfusion tube 8 with external lug 9
Lower end be pierced by liquid storage chamber 11, fluid hole 82 is connected to liquid storage chamber 11, forms infusion channel " external lug 9- perfusion tube 8- storage
Sap cavity 11- outlet end "；After the completion of being infused, rotary spacing switch 6, limit switch 6 is separated with the grab 72 of piston 7, to solve
Except the limit to piston 7, air inlet 13 provides air toward 12 quantification of atmospheric pressure cavity, and positive pressing spring 4 quantitatively has promotion according to pressure difference
Piston 7 gradually reduces the trend of liquid storage chamber 11, external lug 9 is then withdrawn, under the action of reset spring 5, under perfusion tube 8
End is bounced back to upwards in the pit 73 of piston 7, to separate infusion channel, is formed connector as shown in Figure 2, is formed micro- infiltration
Channel " liquid storage chamber 11- outlet end ", the medical fluid in liquid storage chamber 11 is slowly towards the micro- infiltration in 2 direction of screwed union；It is as shown in Figure 3 until living
Plug 7 reaches the top of shell 1, effectively prevent the formation of thrombus, due to that can not push down on piston 7, meets the one of connector
Secondary property use demand has ensured health care safety.
Air inlet 13 toward 12 quantification of atmospheric pressure cavity provide air be control in this way (quantitatively provide air refer to that air inflow is
It is controllable): shell 1 offers air inlet 13, it is extraneous be only connected to by the air inlet 13 between atmospheric pressure cavity 12, and air pressure
The air inflow of chamber 12 be it is quantitatively controllable, by it is quantitative control atmospheric pressure cavity 12 in air inflow come the pressure in control pressure chamber 12
Power, so that indirect quantification adjusts the extension degree of positive pressing spring 4.Specifically can by these mode control pressure chambers 12 into
Tolerance: the openings of sizes of air inlet 13 be it is adjustable, be either provided at air inlet 13 permeation cotton or permeation fibre columns from
And the air inflow or air inlet 13 of quantitative control pressure chamber 12 are provided with air inlet air-breathing air pump.When using air inlet air-breathing gas
This mode is pumped, positive pressing spring 4 can be removed, being slowly advanced for piston 7 also may be implemented in offer thrust only by blowing.
Compared with prior art, the present embodiment passes through the quantitative air inlet of air inlet 13, to quantitatively change between atmospheric pressure cavity 12 and the external world
Pressure difference realize the span of positive pressing spring 4, can more be accurately controlled the push-in stroke and fltting speed of piston 7, go
In addition to micro- infiltration fibre columns of traditional jointing, therefore under micro- infiltration state, do not influenced by liquor strength.It should be noted that passing
The connector of system could be connected to infusion channel due to needing to be pressed downward piston, and the air inlet of shell contributes to balance pressure difference, institute
With air inlet must open it is bigger could be vented, not so piston just can not downlink, can not just form infusion channel normal infusion
, so traditional connector can not achieve quantitative air inlet, traditional connector is generally by the spring for selecting suitable types, knot
The frictional force between piston and shell is closed to realize slowly moving for piston, be cannot achieve and is continued controllable effect.And this reality
Fltting speed and the push-in stroke for applying the piston 7 of example are only related with the air inflow of atmospheric pressure cavity 12, and entire positive pressure sustained release process is ok
Continue controllable.
As another embodiment of the utility model, the embodiment is disclosed interior with Patent No. 201710283803.6
Hold maximum difference and is that the present embodiment eliminates micro- infiltration device and liquid-passing hole, and the atmospheric pressure cavity of the present embodiment is provided with air inlet
106 realize quantitative Controllable Income Air, and specific structure is as shown in Figure 4 and Figure 5, and shell 10 includes the seal section set gradually up and down
101 and active segment 102, the diameter of seal section 101 is smaller than the diameter of active segment 102, and the lower end of shell 10 is fixed with lower connection
Seat 11, lower connecting base 11 are provided with delivery outlet 111 for being connected to external remaining needle, the lower end of perfusion tube 12 be plugged and fixed in
Delivery outlet 111.Piston 13 includes body section 131 and the changeover portion 132 being arranged in above body section 131, body section 131 and transition
Section 132 is integral for combination, in practice can be non-integral composite structure, and body section 131 and changeover portion 132 are mutual
It is can meeting the requirements for gearing.Body section 131 matches with active segment 102, and changeover portion 132 is wanted to match with seal section 101,
The longitudinal section of piston 13 is in " convex " shape, and the top surface inclination of changeover portion 132 is situated so as to form infusion notch.Changeover portion 132 is set
It is equipped with seal groove, upper seal groove is connected with the company of sealing between the upper end for making changeover portion 132 and the inner wall of seal section 101
The upper seal 134 connect, body section 131 are provided with lower seal groove cavity, and lower seal groove cavity is connected with the lateral wall for making body section 131
The lower seal 135 being tightly connected between the inner wall of active segment 102.Liquid storage chamber is formed between piston 13 and active segment 102
103, the side wall of changeover portion 132 is provided with the through hole 133 of connection liquid storage chamber 103 and perfusion tube 12.Perfusion tube 12 is arranged with energy
Enough to provide the positive pressing spring 14 towards the restoring force in 101 direction of seal section to piston 13, one end of positive pressing spring 14 resists piston 13
Lower end, the other end of positive pressing spring 14 resists lower connecting base 11.Compress liquid storage chamber 103 direction be forward direction, the present embodiment to
On direction be forward direction.Gas is formed between 12 outer wall of 10 inner wall of shell and perfusion tube, in conjunction between piston 13 and lower connecting base 11
Chamber 104 is pressed, lower connecting base 11 is provided with connection atmospheric pressure cavity 104 and extraneous venthole 105, and venthole 105 is provided with check valve
For prevent the venthole 105 can only outlet from air inlet, which is made bigger so that external connector 16 push
When 13 downlink of piston, gas is quickly discharged, and the smooth downlink of piston 13 is to form infusion channel.Shell 10 is additionally provided with connection
Atmospheric pressure cavity 104 and extraneous air inlet 106, the air inlet 106 are as with the effect of the air inlet of a upper embodiment being
Change the pressure difference between atmospheric pressure cavity 104 and the external world quantitatively to realize the span of positive pressing spring 14, can more be accurately controlled
The push-in stroke and fltting speed of piston 13.In order to which the gas that enters from air inlet 106 is not leaked from venthole 105, control from
The gas pressure that air inlet 106 enters is not enough to open the check valve of venthole 105.The embodiment is due to needing to open respectively
Set out stomata 105 and air inlet 106, the changeover portion 132 of piston 13 occupies 103 larger space of liquid storage chamber, but operation side
Just, micro- infiltration state can be entered after releasing external lug 16, it is not necessary that separately rotary spacing switchs as a upper embodiment.
In the embodiment use process, when needing to be infused, as shown in figure 4, then the external connector of external liquid infusion apparatus
Inside 16 insertion seal sections 101, piston 13 is pushed to move down, positive pressing spring 14 is compressed, and pressure chamber is compressed, pressure chamber
Gas be discharged from venthole 105, until upper seal 134, when falling back on liquid storage chamber 103, liquid storage chamber 103 is no longer by piston at this time
13 block, and external connector 16 is connected to liquid storage chamber 103, and as shown in dotted arrow in Fig. 4, the liquid of external infusion apparatus successively passes through
External connector 16, input port, seal section 101, liquid storage chamber 103, perfusion tube 12 and delivery outlet 111, have liquid from output when seeing
Behind hole 111, i.e., the air inside connector is discharged from delivery outlet 111, lower connecting base 11 is then connected to external stay again
Needle is set to be infused.It after infusion, extracts external connector 16 and stops infusion, tighten helmet 15 in input port, form such as Fig. 5
Shown structure provides air toward 104 quantification of atmospheric pressure cavity by air inlet 106, and positive pressing spring 14 quantitatively pushes work according to pressure difference
Gradually upward forward direction compresses liquid storage chamber 103 to plug 13, while positive pressing spring 14 drives moving up for changeover portion 132 to restore to liquid storage
Chamber 103 block, inside formed successively by liquid storage chamber 103, through hole 133, perfusion tube 12, external remaining needle micro- bleed-through road.
Air inlet 106 is not necessarily set in the present embodiment, can realize that air-breathing is blown by peripheral auxiliary air pump as a upper embodiment
Gas can be realized through 105 Quick air-discharge of venthole and quantitative air inlet, can also select unidirectionally controlled check valve, i.e. outlet not
Controlled, the controlled check valve of air inlet, also or the adjustable setting of venthole 105, in outlet, venthole 105 is tuned up, into
Venthole, which is turned down, when gas to satisfy the use demand.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (10)
1. positive pressure is sustained connector, the piston including hollow shell and the inside that shell is arranged in, the inner wall of piston and shell it
Between seal, shell is equipped with liquid storage chamber, and liquid storage chamber is located at the forward end of piston, liquid storage chamber connection liquid outlet,
Under transfusion state, piston is because positive mobile without energy by limit, and by external operation triggering, first aspect inlet no longer connects
Logical liquid storage chamber, second aspect release the limit to piston, and piston is able to forward direction and moves into micro- infiltration state；
Under micro- infiltration state, the space in the mobile compression liquid storage chamber of piston forward direction makes medical fluid to form positive pressure to liquid outlet direction
Go out from the micro- infiltration of liquid outlet；
It is characterized in that:
Equipped with atmospheric pressure cavity, it is located at the other end of piston；
Equipped with quantitative gas input unit --- it under transfusion state, is triggered by external operation, quantitative gas input unit is quantitative
Gas be input to atmospheric pressure cavity so that under micro- infiltration state, the gas in atmospheric pressure cavity applies air pressure to piston.
2. positive pressure according to claim 1 is sustained connector, it is characterized in that: inlet is not connected to liquid storage chamber under original state,
Inlet is connected to liquid storage chamber after by external operation, to form this infusion channel of inlet-liquid storage chamber-liquid outlet, entrance is defeated
Liquid status；Connection is realized between inlet and liquid storage chamber by perfusion tube, perfusion tube is arranged in piston, specifically:
The entrance of perfusion tube corresponds to inlet；
Under original state, the outlet of perfusion tube is not connected to liquid storage chamber because being blocked by piston, and perfusion tube is gone out after by external operation
Mouth forward direction, which is moved to, no longer to be blocked to be connected to liquid storage chamber by piston；
Under transfusion state, specifically, the outlet reset of perfusion tube or second aspect are living for the first aspect triggered by external operation
Plug is positive mobile, the outlet of perfusion tube thus blocked no longer to be connected to liquid storage chamber by piston；
Under micro- infiltration state, the outlet of perfusion tube is positive mobile together by piston driving.
3. positive pressure according to claim 1 is sustained connector, it is characterized in that: limit suffered by piston is by limit switch Lai real
Existing, limit switch clasps piston and limits to be formed to piston, limit switch by external operation rotation do not clasp then piston to
Release the limit to piston.
4. positive pressure according to claim 3 is sustained connector, it is characterized in that: piston is provided with card compatible with limit switch
Hook, shell are provided with mounting hole, and limit switch is rotatably penetrated and arranged in mounting hole, seals between limit switch and mounting hole, limit
It is sealed between bit switch and perfusion tube.
5. positive pressure according to claim 4 is sustained connector, it is characterized in that: the shell is provided with for preventing piston rotation
Structure.
6. positive pressure according to claim 1 is sustained connector, it is characterized in that: being equipped with positive pressing spring bestows positive elastic force to piston
So that piston generates positive mobile trend.
7. positive pressure according to claim 1 or 6 is sustained connector, it is characterized in that: the quantitative gas input unit is to open up
In shell and it is connected to the extraneous air inlet with atmospheric pressure cavity.
8. positive pressure according to claim 7 is sustained connector, it is characterized in that: the air inlet is connected with air pump, to control
The gas flow being input in atmospheric pressure cavity.
9. positive pressure according to claim 2 is sustained connector, it is characterized in that: the outlet reset of perfusion tube is achieved in that
Reversed elastic force is bestowed to perfusion tube equipped with reset spring the outlet of the perfusion tube is moved backward to by piston and blocks.
10. positive pressure according to claim 1 is sustained connector, it is characterized in that: being equipped with the changeover portion interlocked with piston reciprocating；
Connection is realized by passing through the perfusion tube of piston between liquid storage chamber and liquid outlet, wherein the entrance of perfusion tube corresponds to liquid storage
The outlet of chamber, perfusion tube corresponds to liquid outlet；
Under original state, changeover portion is got lodged between inlet and liquid storage chamber, so that inlet is not connected to liquid storage chamber, by external operation
Changeover portion, which is got out of the way, afterwards makes inlet be connected to liquid storage chamber, so that it is logical to form inlet-liquid storage chamber-perfusion tube-liquid outlet this infusion
Road, into transfusion state；
Under transfusion state, piston cannot be positive mobile due to being limited by changeover portion, is triggered by the external operation, changeover portion is multiple
Position, first aspect, which is got lodged in again between inlet and liquid storage chamber, makes inlet no longer be connected to liquid storage chamber, second aspect releasing pair
The limit of piston, piston are able to forward direction and move into micro- infiltration state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820406180.7U CN208678053U (en) | 2018-03-23 | 2018-03-23 | Positive pressure is sustained connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820406180.7U CN208678053U (en) | 2018-03-23 | 2018-03-23 | Positive pressure is sustained connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208678053U true CN208678053U (en) | 2019-04-02 |
Family
ID=65875950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201820406180.7U Active CN208678053U (en) | 2018-03-23 | 2018-03-23 | Positive pressure is sustained connector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421113A (en) * | 2018-03-23 | 2018-08-21 | 广东先来医疗器械有限公司 | Positive pressure is sustained connector |
-
2018
- 2018-03-23 CN CN201820406180.7U patent/CN208678053U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421113A (en) * | 2018-03-23 | 2018-08-21 | 广东先来医疗器械有限公司 | Positive pressure is sustained connector |
| CN108421113B (en) * | 2018-03-23 | 2024-02-20 | 广东先来医疗器械有限公司 | Positive pressure slow release joint |
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