CN208670371U - A kind of two-way self-sealing joint and two-way self-sealing flow-stop valve - Google Patents
A kind of two-way self-sealing joint and two-way self-sealing flow-stop valve Download PDFInfo
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- CN208670371U CN208670371U CN201820950654.4U CN201820950654U CN208670371U CN 208670371 U CN208670371 U CN 208670371U CN 201820950654 U CN201820950654 U CN 201820950654U CN 208670371 U CN208670371 U CN 208670371U
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Abstract
The utility model relates to a kind of two-way self-sealing joint, including the first connector, the second connector and two-way self-sealing flow-stop valve, two-way self-sealing flow-stop valve includes two unit flow-stop valves, and two unit flow-stop valves are respectively arranged in the first connector and the second connector.Configuration has the two-way self-sealing flow-stop valve of self-sealing function in the first connector and the second connector, after the first connector is docked with the second connector, the spool of two unit flow-stop valves is to top, two spools overcome the elastic force of respective return springs to move towards, so that the conical surface of two spools is detached from the step structure of valve inner, fluid channel is connected automatically；After first connector is separated with the second connector, two spools relatively move under the action of fluid medium pressure and return springs, so that the conical surface of two spools pushes against the step structure of valve inner, fluid channel self-closed, to which flow path is connected automatically when realizing connector docking, flow path self-closed when connector separates, prevents medium from leaking.
Description
Technical field
The application belongs to hydropneumatic device technical field, and in particular to a kind of two-way self-sealing joint and two-way from close
Seal flow-stop valve.
Background technique
Many flow paths need frequently separation in hydro-pneumatic field, to prevent a large amount of of fluid media (medium) after flow path separation from letting out
Leakage is needed using self sealing structure.Quick coupling is mostly used in fluid piping system at present to realize the self-sealing of disassembly, but
When multiple flow paths need while dismounting or not allowing due to space limitation using piping connection, flow path is usually embedded in part
In, the conducting and truncation of flow path are realized by the docking of part and separation, quick coupling and are not suitable in such cases.
Summary of the invention
In order to solve the above technical problems, the utility model provides a kind of two-way self-sealing joint and two-way self-sealing stops
Valve is flowed, which is configured with the two-way self-sealing flow-stop valve for having self-sealing function, makes zero with the connector
Part flow path in docking is connected automatically, and in separation, flow path and energy self-closed, prevent medium from leaking.
Realize that technical solution used by the utility model aim is a kind of two-way self-sealing joint, including interface phase
It is provided with connector channel in the first connector and the second connector matched, first connector and second connector, further includes double
To self-sealing flow-stop valve, the two-way self-sealing flow-stop valve includes two unit flow-stop valves, two unit flow-stop valve difference
It is installed in first connector and second connector, and two unit flow-stop valves are oppositely arranged；
Two unit flow-stop valves include valve body, spool and return springs, in which:
The valve inner is provided with perforative ladder hole, and the ladder hole connects with the corresponding connector channel
It is logical, there is step structure, the valve body is set on the spool inside the ladder hole；
The spool is multi-diameter shaft, including wide section and thin diameter section, the transition position of the wide section and the thin diameter section are
The conical surface offers mounting groove in the wide section, and it is logical that the spool being connected with the ladder hole is offered in the thin diameter section
Road, the connector channel, the ladder hole and the valve core channel constitute fluid channel；
The return springs are installed in the mounting groove, and under the action of the return springs, the conical surface is supported
The tight step structure, and the thin diameter section of the spool stretches out in outside the valve body.
Preferably, it is provided in the interface of the interface of first connector and second connector and the connector
The part cavities that channel is connected, two unit flow-stop valves are respectively arranged in first connector and second connector
In the part cavities.
Preferably, the internal diameter of the part cavities is greater than the internal diameter of the connector channel, and the part cavities and the connector are logical
The transition face in road constitutes confined planes, and the valve body and the return springs pass through the confined planes and limit.
Preferably, its circumferential direction is provided with 1 or more recirculation hole on the thin diameter section, the valve core channel passes through the stream
Through-hole is connected with the ladder hole；
The sum of flow area of each recirculation hole is not less than the nominal flow area of the corresponding unit flow-stop valve.
Preferably, the position close to the conical surface of the thin diameter section is necking segment, and the recirculation hole is distributed in the contracting
On cervical part of esophagus.
Preferably, the return springs be reset spring, the reset spring of two unit flow-stop valves it is rigid
Degree is not identical, and the unit being less than positioned at the rigidity of the reset spring of the unit flow-stop valve of upstream positioned at downstream stops
Flow the rigidity of the reset spring of valve.
Preferably, its circumferential direction is provided with 1 or more oil guiding hole on the wide section, the mounting groove passes through the Oil Guide
Hole is connected with the ladder hole.
Preferably, the outer end face of the valve body is equipped with flat recess.
Preferably, the valve body is connected with corresponding first connector or second joint screw thread；
Its axial direction is provided with 1 or more seal groove on the outer surface of the valve body, sealing is installed in the seal groove
Circle, the sealing ring close the gap between the valve body and corresponding first connector or second connector.
Based on same inventive concept, the utility model additionally provides a kind of two-way self-sealing flow-stop valve, including two lists
First flow-stop valve, two unit flow-stop valves are oppositely arranged；Two unit flow-stop valves include valve body, spool and reset bullet
Property part, in which:
The valve inner is provided with perforative ladder hole, has step structure, the valve inside the ladder hole
Body is set on the spool；
The spool is multi-diameter shaft, including wide section and thin diameter section, the transition position of the wide section and the thin diameter section are
The conical surface offers mounting groove in the wide section, and it is logical that the spool being connected with the ladder hole is offered in the thin diameter section
Road；
The return springs are installed in the mounting groove, and under the action of the return springs, the conical surface is supported
The tight step structure, and the thin diameter section of the spool stretches out in outside the valve body.
As shown from the above technical solution, two-way self-sealing joint provided by the utility model connects in the first connector and second
Configuration has the two-way self-sealing flow-stop valve of self-sealing function in head, which includes two unit fluid stoppings
Valve, two unit flow-stop valves are oppositely arranged, are respectively arranged in the first connector and the second connector.Two unit flow-stop valves wrap
Valve body, spool and return springs are included, valve body is fixed within a fitting and is placed on spool, and valve body and spool opposite can move
Dynamic, return springs provide elastic force for the reset of valve body, and spool stretches out in outside valve body under normal circumstances.Valve core inside setting
For the valve core channel of fluid circulation, the valve core channel and ladder hole and connector channel sequential communication form fluid channel.
After the first connector is docked with the second connector, to top, two spools overcome respectively the spool of two unit flow-stop valves
The elastic forces of return springs move towards so that the conical surface of two spools is detached from the step structure of valve inner, fluid
Channel is connected automatically；After first connector is separated with the second connector, two spools are in fluid medium pressure and respective reset bullet
It is relatively moved under the action of property part, so that the conical surface of two spools pushes against the step structure of valve inner, fluid channel is automatic
Closing, to realize that flow path is connected automatically when docking, in separation, the function of flow path and energy self-closed, prevents medium from leaking.
Since the two-way self-sealing flow-stop valve is directly anchored in connector, the normal use of connector is not influenced and is not take up
Exterior space, the occasion particularly suitable for limited space.Conducting or the movement of closed fluid passages are docked or are separated in connector
When be automatically performed, and multiple two-way self-sealing flow-stop valve parallel connections can be used for multiple flow paths while, is connected and truncation, therefore this pair
Multiple flow paths needs are particularly suitable for self-sealing flow-stop valve while being dismounted or not allowed since space limits using piping connection
And the occasion of quick coupling is not available it.
Detailed description of the invention
Fig. 1 is structure chart of the two-way self-sealing joint under mated condition in the utility model embodiment；
Fig. 2 is structure chart of the two-way self-sealing joint under discrete state in the utility model embodiment；
Fig. 3 is the complete section perspective view of two-way self-sealing fluid stopping valve body in the utility model embodiment；
Fig. 4 is the complete section perspective view of two-way self-sealing fluid stopping valve core in the utility model embodiment.
Description of symbols: the first connector of 100-；The second connector of 200-；101- connector channel；102- part cavities；103- connects
Mouthful；104- confined planes；1- valve body, 11- ladder hole, 12- step structure, 13- seal groove, 14- flat recess；2- spool, 21-
Thin diameter section, 22- wide section, the 23- conical surface, 24- valve core channel, 25- mounting groove, 26- recirculation hole, 27- oil guiding hole, 28- necking segment；
3- return springs；4- sealing ring.
Specific embodiment
In order to make the application the technical staff in the technical field be more clearly understood that the application, with reference to the accompanying drawing,
Technical scheme is described in detail by specific embodiment.
In the utility model embodiment, referring to Fig. 1 and Fig. 2, a kind of two-way self-sealing joint, including 103 phase of interface
The first connector 100 and the second connector 200 matched, the first connector 100 and the second connector 200 can be the connector of any part,
Shape is unrestricted, is provided with connector channel 101 in the first connector 100 and the second connector 200, the stream for fluid media (medium)
It is logical.The interface 103 of the first connector 100 and the second connector 200 is cooperated using step axle hole machine in the present embodiment, so that the first connector
100 and second connector 200 have higher assembly concentricity.
Two-way self-sealing flow-stop valve is installed in two-way self-sealing joint, referring to Fig. 1 and Fig. 2, two-way self-sealing fluid stopping
Valve includes two unit flow-stop valve 300a, 300b, two unit flow-stop valves 300a, 300b be respectively arranged in the first connector 100 with
And second in connector 200, and two unit flow-stop valves 300a, 300b are oppositely arranged (spool 2 is oppositely installed).First connector
The part cavities 102 being connected with connector channel 101, part are provided in the interface of 100 interface and the second connector 200
The internal diameter of chamber 102 is greater than connector channel 101, therefore the transition face between connector channel 101 and part cavities 102 forms a limit
Face 104,300a, 300b are installed on the part cavities 102 and second connector 200 of the first connector 100 to two unit flow-stop valves respectively
In part cavities 102.
Two unit flow-stop valves 300a, 300b include valve body 1, spool 2 and return springs 3, and valve body 1 is set in spool
On 2, inner end is limited by the confined planes 104, and the outer surface of valve body 1 is provided with screw thread, valve body 1 and corresponding part when installation
The cavity wall of chamber 102 is threadedly coupled, and valve body 1 is fixed when connector docks, and spool 2 can move axially in valve body 1, to seal
Close or be connected two connectors.
Referring to Fig. 3, valve body 1 is internally provided with the ladder hole 11 through valve body 1, and ladder hole 11 is logical with corresponding connector
Road 101 is connected to, and a step structure 12 is formed inside ladder hole 11, and the outer end face of valve body 1 is equipped with flat recess 14, is used as and screws in
The operative position of valve body 1.Its axial direction is provided with 1 or more seal groove 13 on the outer end outer surface of valve body 1, is installed in seal groove 13
There is sealing ring 4, the gap between 4 closed valve 1 of sealing ring and corresponding 102 cavity wall of part cavities prevents fluid media (medium) from leaking.This
In embodiment, sealing ring 4 selects O-ring seal, and corresponding seal groove 13 is annular groove, the axial direction of the quantity view valve body 1 of sealing ring
Depending on length.To guarantee that O-ring seal has good sealing effect, the concentricity requirement of the external screw thread and seal groove 13 of valve body 1
Not less than 0.03.
Referring to fig. 4, spool 2 is multi-diameter shaft, including thin diameter section 21 and wide section 22, the transition of thin diameter section 21 and wide section 22
Place is the conical surface 23, and the surface roughness of the conical surface 23 is not higher than Ra1.6, improves sealing when unit flow-stop valve 300a, 300b closing
Performance.
The valve core channel 24 being connected with ladder hole 11 is offered in thin diameter section 21, valve core channel 24 is located at thin diameter section 21
Center, and valve core channel 24 and thin diameter section 21 are coaxial, and connector channel 101, ladder hole 11 and valve core channel 24 constitute stream
Body channel, is provided with 1 or more recirculation hole 26 along its circumferential direction on thin diameter section 21, and valve core channel 24 passes through recirculation hole 26 and ladder
Through-hole 11 is connected, and the sum of flow area of each recirculation hole is not less than the nominal flow area of corresponding unit flow-stop valve, guarantees
Fluid media (medium) will not generate the excessive pressure loss when flowing at recirculation hole.In order to facilitate fluid media (medium) flowing, thin diameter section 21
The position of the close conical surface 23 be necking segment 28, each recirculation hole 26 is uniformly distributed circumferentially in necking segment 28.
Mounting groove 25 is offered in wide section 22, the cavity when spool 2 is mobile, between mounting groove 25 and confined planes 104
Volume changes, and hinders connector docking in order to avoid fluid media (medium) is pressurized, its circumferential direction is provided with 1 or more on wide section 22
Oil guiding hole 27, mounting groove are connected by oil guiding hole 27 with ladder hole 11, when spool 2 is mobile, are balanced by oil guiding hole 27
25 inside and outside differential pressure of mounting groove.
Referring to Fig. 1, return springs 3 are installed in mounting groove 25, and both ends push against 25 slot bottom of mounting groove and limit respectively
Face 104, return springs 3 are reset spring, the rigidity of the reset spring of two unit flow-stop valves 300a, 300b in the present embodiment
It is not identical, the reset spring of the unit flow-stop valve positioned at downstream is less than positioned at the rigidity of the reset spring of the unit flow-stop valve of upstream
Rigidity, it is ensured that the unit flow-stop valve of fluid channel upstream is first closed, and reduces the outer discharge of fluid media (medium) to greatest extent.Referring to fig. 2,
Under the action of return springs 3, the conical surface 23 pushes against step structure 12, and the thin diameter section 21 of spool 2 stretches out in outside valve body 1.
In order to guarantee that the first connector 100 is smoothly docked with the second connector 200, one of unit flow-stop valve 300a, 300b
Spool 2 should stretch out corresponding interface 103.In the present embodiment, the first connector 100 is upstream, 103 evagination of interface；Second connects
First 200 be downstream, and the spool 2b stretching of 103 indent of interface, the unit flow-stop valve 300b in corresponding second connector 200 connects
It is mouthful outer, as shown in Fig. 2, and spool 2b be inserted into the depth of the first connector 100 and should be greater than two unit flow-stop valves 300a, 300b
Spool 2 is by being conducting to the sum of closed stroke.The length of the spool 2b of unit flow-stop valve 300b is longer, the sealing ring being arranged thereon
Quantity is also corresponding more, and in the present embodiment, 4 sealing rings 4 are arranged on the valve body 1b of unit flow-stop valve 300b altogether.
The two-way self-sealing joint of the present embodiment use process is as follows:
1, connector docks:
When the first connector 100 and the second connector 200 dock, the spool 2b of unit flow-stop valve 300b is inserted into the first connector
In 100 (as shown in Figure 2), spool 2b and spool 2a are to top, the valve core channel 24 of spool 2b and the valve core channel 24 of spool 2a
Connection；
Since the spool 2b depth for being inserted into the first connector 100 is greater than two unit flow-stop valve 300a, 300b spools 2 by being connected
The sum of to closed stroke, after spool 2b and spool 2a are to top, spool 2b overcomes the resilient force of return springs 3a first
Spool 2a continues to move along a distance, which take off the conical surface 23 of spool 2a and the step structure 12 of valve body 1a gradually
From the fluid channel inside the first connector 100 is connected；
The resilient force that return springs 3a is generated by deformation in spool 2b, while spool 2b compress downstream it is multiple
Position elastic component 3b, compression return springs 3b progressively disengage the conical surface 23 of spool 2b and the step structure 12 of valve body 1b, the
Fluid channel conducting inside two connectors 200, and be connected to the fluid channel inside the first connector 100, the first connector 100
With the second conducting automatically of connector 200；
After spool 2b continues to move along a distance, the first connector 100 is docked with the interface 103 of the second connector 200,
Docking is completed at this time, rigid less than the return springs 3b positioned at downstream due to being located at the rigidity of return springs 3a of upstream
Degree, the deflection of return springs 3a are greater than the deflection of return springs 3b, the structure of the two-way self-sealing joint after docking
As shown in Figure 1.
2, connector separates:
When the first connector 100 and the second connector 200 separate, spool 2b is separated with spool 2a, return springs 3a and is answered
Position elastic component 3b is gradually restored to normal condition under the effect of selfer power and the double action of fluid medium pressure；
Fluid media (medium) and return springs 3a in first connector 100 push spool 2a to move downstream, so that
The conical surface 23 of spool 2a is pressed on the step structure of valve body 1a, forms sealing surface, closes the fluid inside the first connector 100
Channel；
Fluid media (medium) and return springs 3b in second connector 200 push spool 2b upstream direction mobile, so that
The conical surface 23 of spool 2b is pressed on the step structure of valve body 1b, forms sealing surface, and the fluid closed inside the second connector 200 is logical
Road；
Rigidity due to being located at the return springs 3a of upstream is less than the rigidity of the return springs 3b positioned at downstream, the
When one connector 100 and the second connector 200 separate, the unit flow-stop valve 300a positioned at upstream is first closed, and reduces medium to greatest extent
The structure of outer discharge, the two-way self-sealing joint after separation is as shown in Figure 2.
Through the foregoing embodiment, the utility model has the advantages that or advantage:
1) two-way self-sealing joint provided by the utility model, configuration has self-sealing in the first connector and the second connector
The two-way self-sealing flow-stop valve of function, after the first connector is docked with the second connector, the spools of two unit flow-stop valves is to top, and two
A spool overcomes the elastic force of respective return springs to move towards, so that the conical surface of two spools is detached from valve inner
Step structure, fluid channel are connected automatically；After first connector is separated with the second connector, two spools in fluid medium pressure and
It is relatively moved under the action of respective return springs, so that the conical surface of two spools pushes against the step structure of valve inner,
Fluid channel self-closed, to realize that flow path is connected automatically when docking, in separation, the function of flow path and energy self-closed, prevents
Only fluid media (medium) leaks.
2) two-way self-sealing flow-stop valve provided by the utility model is directly anchored in connector, does not influence normally making for connector
With and be not take up exterior space, particularly suitable for the occasion of limited space, conducting or the movement of closed fluid passages are to connect
It is automatically performed when head docking or separation, and multiple two-way self-sealing flow-stop valve parallel connections can be used for being connected and cutting while multiple flow paths
It is disconnected, therefore the two-way self-sealing flow-stop valve is particularly suitable for multiple flow paths and needs while dismounting or not allowing to make since space limits
With piping connection and the occasion of quick coupling is not available it.
3) two-way self-sealing flow-stop valve provided by the utility model, using the conical surface to the hard sealing means on pinnacle, and its is close
Envelope is more directly proportional to pressure medium than pressing, i.e. pressure more high sealing is more reliable, therefore two-way self-sealing provided by the utility model stops
It flows valve and is suitable for the higher application of pressure.
Although the preferred embodiment of the application has been described, but one of ordinary skilled in the art once knows substantially
Creative concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (10)
1. a kind of two-way self-sealing joint, including the first connector and the second connector that interface matches, first connector and institute
It states in the second connector and is provided with connector channel, it is characterised in that: further include two-way self-sealing flow-stop valve, the two-way self-sealing
Flow-stop valve includes two unit flow-stop valves, and two unit flow-stop valves are respectively arranged in first connector and described second
In connector, and two unit flow-stop valves are oppositely arranged；
Two unit flow-stop valves include valve body, spool and return springs, in which:
The valve inner is provided with perforative ladder hole, and the ladder hole is connected to the corresponding connector channel, institute
Stating has step structure inside ladder hole, the valve body is set on the spool；
The spool is multi-diameter shaft, including wide section and thin diameter section, and the transition position of the wide section and the thin diameter section is the conical surface,
Mounting groove is offered in the wide section, and the valve core channel being connected with the ladder hole, institute are offered in the thin diameter section
It states connector channel, the ladder hole and the valve core channel and constitutes fluid channel；
The return springs are installed in the mounting groove, and under the action of the return springs, the conical surface pushes against institute
Step structure is stated, and the thin diameter section of the spool stretches out in outside the valve body.
2. two-way self-sealing joint as described in claim 1, it is characterised in that: the interface of first connector and described the
The part cavities being connected with the connector channel are provided in the interface of two connectors, two unit flow-stop valves are pacified respectively
In the part cavities loaded on first connector and second connector.
3. two-way self-sealing joint as claimed in claim 2, it is characterised in that: the internal diameter of the part cavities is greater than the connector
The transition face of the internal diameter in channel, the part cavities and the connector channel constitutes confined planes, the valve body and the reset bullet
Property part passes through the confined planes and limits.
4. two-way self-sealing joint as described in claim 1, it is characterised in that: its circumferential direction is provided with 1 on the thin diameter section
A above recirculation hole, the valve core channel are connected by the recirculation hole with the ladder hole；
The sum of flow area of each recirculation hole is not less than the nominal flow area of the corresponding unit flow-stop valve.
5. two-way self-sealing joint as claimed in claim 4, it is characterised in that: the portion close to the conical surface of the thin diameter section
Position is necking segment, and the recirculation hole is distributed in the necking segment.
6. two-way self-sealing joint as described in claim 1, it is characterised in that: the return springs are reset spring, two
The rigidity of the reset spring of a unit flow-stop valve is not identical, positioned at the reset of the unit flow-stop valve of upstream
The rigidity of spring is less than the rigidity of the reset spring of the unit flow-stop valve positioned at downstream.
7. two-way self-sealing joint as described in claim 1, it is characterised in that: its circumferential direction is provided with 1 on the wide section
A above oil guiding hole, the mounting groove are connected by the oil guiding hole with the ladder hole.
8. two-way self-sealing joint as described in claim 1, it is characterised in that: the outer end face of the valve body is equipped with a word
Slot.
9. two-way self-sealing joint as described in claim 1, it is characterised in that: the valve body and corresponding first connector
Or the second joint screw thread connection；
Its axial direction is provided with 1 or more seal groove on the outer surface of the valve body, sealing ring is installed in the seal groove, institute
It states sealing ring and closes gap between the valve body and corresponding first connector or second connector.
10. a kind of two-way self-sealing flow-stop valve, it is characterised in that: including two unit flow-stop valves, two unit flow-stop valves
It is oppositely arranged；Two unit flow-stop valves include valve body, spool and return springs, in which:
The valve inner is provided with perforative ladder hole, has step structure, the valve body set inside the ladder hole
It is located on the spool；
The spool is multi-diameter shaft, including wide section and thin diameter section, and the transition position of the wide section and the thin diameter section is the conical surface,
Mounting groove is offered in the wide section, and the valve core channel being connected with the ladder hole is offered in the thin diameter section；
The return springs are installed in the mounting groove, and under the action of the return springs, the conical surface pushes against institute
Step structure is stated, and the thin diameter section of the spool stretches out in outside the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950654.4U CN208670371U (en) | 2018-06-20 | 2018-06-20 | A kind of two-way self-sealing joint and two-way self-sealing flow-stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950654.4U CN208670371U (en) | 2018-06-20 | 2018-06-20 | A kind of two-way self-sealing joint and two-way self-sealing flow-stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208670371U true CN208670371U (en) | 2019-03-29 |
Family
ID=65824454
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820950654.4U Active CN208670371U (en) | 2018-06-20 | 2018-06-20 | A kind of two-way self-sealing joint and two-way self-sealing flow-stop valve |
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| Country | Link |
|---|---|
| CN (1) | CN208670371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075382A (en) * | 2019-05-29 | 2019-08-02 | 浙江伏尔特医疗器械股份有限公司 | A kind of multi-functional non-PVC material infusion apparatus |
| CN112493846A (en) * | 2020-12-23 | 2021-03-16 | 广东乘心电器实业有限公司 | Liquid supply system of steam heating cabinet |
-
2018
- 2018-06-20 CN CN201820950654.4U patent/CN208670371U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075382A (en) * | 2019-05-29 | 2019-08-02 | 浙江伏尔特医疗器械股份有限公司 | A kind of multi-functional non-PVC material infusion apparatus |
| CN110075382B (en) * | 2019-05-29 | 2024-04-19 | 浙江伏尔特医疗器械股份有限公司 | Multifunctional non-PVC material transfusion system |
| CN112493846A (en) * | 2020-12-23 | 2021-03-16 | 广东乘心电器实业有限公司 | Liquid supply system of steam heating cabinet |
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