CN201996893U - Self-resetting pressure reducing valve for hemodialysis - Google Patents
Self-resetting pressure reducing valve for hemodialysis Download PDFInfo
- Publication number
- CN201996893U CN201996893U CN2011200271414U CN201120027141U CN201996893U CN 201996893 U CN201996893 U CN 201996893U CN 2011200271414 U CN2011200271414 U CN 2011200271414U CN 201120027141 U CN201120027141 U CN 201120027141U CN 201996893 U CN201996893 U CN 201996893U
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- valve body
- fixed cup
- pivot pin
- spring
- fixed
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Abstract
The utility model discloses a self-resetting pressure reducing valve for hemodialysis. An upper cavity and a lower cavity of a lower valve body are communicated with each other through a hole, a fixed cup is mounted in the hole, the lower end of the fixed cup is embedded into an inner cavity of a fixing seat, a pin penetrates through a central hole of the fixed cup, the central hole of the fixed cup can be plugged by a nose of the pin, a second spring is sleeved on the pin, the upper end of the pin is butted upon the lower end of a fixed block, the upper end of the fixed block is butted upon the lower end of a first spring, an annular groove is arranged in the middle of the fixed block, and a diaphragm is mounted in the annular groove. The self-resetting pressure reducing valve has fine biological performance, is anti-rust and effectively avoids medial fluid contamination. A conventional rubber diaphragm is replaced by the springs to realize resetting and sealing, high reliability in pressure reduction can be guaranteed after long-term use, and the defect of noise generation caused by resonance of the conventional structures is eliminated.
Description
Technical field
This utility model belongs to the hemodialysis technology field, and specifically, particularly hemodialysis is with from the air relief valve that resets.
Background technology
Air relief valve is the vitals on the haemodialysis control unit, plays a part to regulate and control piper pressure.At present, the air relief valve that uses on the haemodialysis control unit generally is made of valve body and core assembly, and existing deficiency is:
1) adopt metal to make valve body usually, valve body easily gets rusty, and perhaps pollutes medical fluid because of the precipitating metal ion.
2) mode that adopts rubber diaphragm to reset and seal usually, rubber diaphragm are easily aging, can reduce the reliability of air relief valve after rubber diaphragm is nonelastic.
3) poor sealing appears in the poor reliability of valve body import department sealing ring easily, and it is bad to occur effect of easing stress once in a while, or the bigger situation of noise occurs because of producing resonance with feed liquor.
The utility model content
The hemodialysis that technical problem to be solved in the utility model is to provide a kind of good reliability is with from resetting air relief valve.
The technical solution of the utility model is as follows: a kind of hemodialysis is with from the air relief valve that resets, the fixing valve body (2) down in the lower end of upper valve body (1), the top of upper valve body (1) is equipped with from top to bottom adjusts screw (3), the inner chamber of upper valve body (1) is stretched in the lower end of this adjustment screw (3), and be pressed on the end face of pressure pad (4), the upper end of the lower end of pressure pad (4) and first spring (5) is fixed, be provided with liquid inlet joint (6) and fluid joint (7) on the valve body (2) down described, have upper chamber (2a) and lower chamber (2b) in the following valve body (2), wherein upper chamber (2a) is communicated with the endoporus of fluid joint (7), lower chamber (2b) is communicated with the endoporus of liquid inlet joint (6), and on, lower chamber (2a, communicate by aperture 2b), its key is: fixed cup (8) is installed in described aperture, the lower end of this fixed cup (8) embeds in the inner chamber of holder (9), holder (9) is positioned at lower chamber (2b), and the inner chamber of holder (9) is communicated with the endoporus of liquid inlet joint (6); In the centre bore of described fixed cup (8), be equipped with pivot pin (10), the centre bore matched in clearance of this pivot pin (10) and fixed cup (8), the spindle nose of pivot pin (10) is arranged in the inner chamber of holder (9), and can be with the centre bore shutoff of fixed cup (8), on described pivot pin (10), be set with second spring (11), step surface butt in the lower end of this second spring (11) and fixed cup (8) centre bore, the snap ring (12) that the upper end of second spring (11) and pivot pin (10) top are provided with connects, the lower end butt of the upper end of described pivot pin (10) and fixed block (13), the lower end butt of the upper end of fixed block (13) and first spring (5); Middle part at described fixed block (13) is provided with annular groove, and diaphragm (14) is installed in this annular groove, and the edge of described diaphragm (14) is compressed by upper and lower valve body (1,2).
Adopt above technical scheme, liquid enters down the lower chamber of valve body by liquid inlet joint, because first spring can produce a downward pressure to pivot pin by fixed block, the elastic force that this pressure surpasses second spring allows pivot pin move down with fluid pressure with joint efforts, and the spindle nose that makes pivot pin is opened the centre bore of fixed cup, so upper chamber that the liquid that liquid inlet joint enters can enter down valve body by the centre bore of fixed cup, can produce certain upward pressure (suppose this fluid joint of valve body stop up fully) at present to diaphragm owing to enter the liquid of upper chamber, fluid pressure that should be upwards and the elastic force of second spring is formed can overcome the downward pressure of first spring with joint efforts gradually and pivot pin is moved up, up to the spindle nose of pivot pin with the complete shutoff of the centre bore of fixed cup, the upper chamber of following valve body and lower chamber are isolated (when following valve body fluid joint stopped up, upper chamber was the maximum pressure in air relief valve exit to the pressure of fluid joint); When if open in the fluid joint exit of following valve body, because the pressure in the valve body upper chamber descends down, the equilibrium point of first spring force and second spring, fluid pressure is destroyed, so first spring can make pivot pin move down, make the flow direction fluid joint at liquid inlet joint place, pressure in valve body fluid joint exit can be less than the pressure of outlet be stopped up fully the time at present for this.
The maximum pressure (maximum pressure when promptly descending the outlet of valve body fluid joint to stop up) that enters down the liquid generation of valve body upper chamber can only be less than or equal to the pressure of valve body liquid inlet joint down, and when the outlet of fluid joint was not stopped up, the pressure in exit more can be less than the pressure at liquid inlet joint place; When the adjustment screw was adjusted downwards, this maximum pressure can increase, and when the adjustment screw adjusted upward, this maximum pressure can reduce.
Have this as seen, this utility model has been realized the reduction of inlet pressure to outlet pressure, and outlet pressure can be in the certain limit adjustment.When the adjustment screw makes first spring in a fixed position, owing to first spring force does not change (the minimum elastic force that second spring makes progress is relative fixed also), so even the fluid pressure of import department constantly increases, the maximum pressure in exit also can be constant.When adjusting screw first spring is unclamped, second spring can promote pivot pin and move up automatically, guarantees that the maximum pressure of air relief valve is constant all the time, and then makes the air relief valve all the time can reliably working.
In order to strengthen sealing, prevent to leak between fixed cup and the following valve body, between described fixed cup (8) and following valve body (2), first sealing ring (15) is installed.
Between described fixed cup (8) and holder (9), second sealing ring (16) is installed, the centre bore of this second sealing ring (16) is over against the centre bore of fixed cup (8), and the spindle nose of described pivot pin (10) cooperates by the centre bore of the conical surface with second sealing ring (16).Above structure has strengthened the sealing between fixed cup and the holder on the one hand, and on the other hand, opening with shutoff of pivot pin control fixed cup centre bore is sensitiveer, reliable, and the sealing effectiveness can guarantee shutoff by cone match the time.
In order to strengthen sealing, prevent to leak between holder and the following valve body, between described holder (9) and following valve body (2), the 3rd sealing ring (17) is installed, the 3rd sealing ring (17) is lower than the endoporus of liquid inlet joint (6).
For simplified structure, convenient for assembly, be fixed with shrouding (18) in the described bottom of valve body (2) down, this shrouding (18) is with the lower port sealing of lower chamber (2b), and the lower end of described holder (9) embeds in the shrouding (18), and both are fixed together.
The beneficial effects of the utility model are:
1) can adopt medical grade rubber and plastic production, biology performance is good, can not get rusty, and has effectively avoided the medical fluid pollution.
2) replace the rubber diaphragm sealing that resets with spring, life-time service also can guarantee the reliability height that reduces pressure.
3) good airproof performance can not leak, and has eliminated traditional structure produces noise because of resonance disadvantage.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, the utlity model has upper valve body 1 and following valve body 2, upper and lower valve body 1,2 is made by medical grade rubber or plastics, and on the upper valve body 1 spiral-lock infra valve body 2, is fixed together by many screws.One side of infra valve body 2 is formed with liquid inlet joint 6, and opposite side is formed with fluid joint 7.Described have upper chamber 2a and lower chamber 2b in the valve body 2 down, upper chamber 2a and lower chamber 2b are circle, wherein the bottom opening of upper chamber 2a is communicated with the endoporus of fluid joint 7, the side-wall hole of lower chamber 2b is communicated with the endoporus of liquid inlet joint 6, and communicates by aperture between upper and lower part chamber 2a, the 2b.
As can be known from Fig. 1, in the aperture between upper and lower part chamber 2a, 2b fixed cup 8 is installed, first sealing ring, 15, the first sealing rings 15 is housed between this fixed cup 8 and the following valve body 2 is higher than liquid inlet joint 6.The lower end of described fixed cup 8 embeds in the inner chamber of holder 9, and is spacing by the step surface in holder 9 inner chambers.Second sealing ring 16 is installed between fixed cup 8 and holder 9, and the centre bore of this second sealing ring 16 is over against the centre bore of fixed cup 8, and aperture, the lower end equal and opposite in direction of the centre bore of second sealing ring 16 and fixed cup 8 centre bores.Described holder 9 is positioned at lower chamber 2b, and the inner chamber of holder 9 is communicated with by the endoporus of cross through hole with liquid inlet joint 6.The lower end of holder 9 embeds in the shrouding 18, and both are fixed together.Shrouding 18 is by the bottom of bolting in following valve body 2, and this shrouding 18 is with the lower port sealing of lower chamber 2b.The endoporus that the 3rd sealing ring 17, the three sealing rings 17 are lower than liquid inlet joint 6 is installed between described holder 9 and following valve body 2.
From Fig. 1 also as can be known, in the centre bore of fixed cup 8, be equipped with pivot pin 10, the centre bore matched in clearance of this pivot pin 10 and fixed cup 8, the integrally formed spindle nose in pivot pin 10 bottoms is arranged in the inner chamber of holder 9, the conical surface between pivot pin 10 spindle noses and the axle body can stretch in the centre bore of second sealing ring 16, with the centre bore shutoff of fixed cup 8.On described pivot pin 10, be set with second spring 11, the step surface butt in the lower end of this second spring 11 and fixed cup 8 centre bores, the snap ring 12 that the upper end of second spring 11 and pivot pin 10 tops are provided with connects, and snap ring 12 is arranged in upper chamber 2a.The lower end butt of the upper end of described pivot pin 10 and fixed block 13, middle part at fixed block 13 is provided with annular groove, diaphragm 14 is installed in this annular groove, and the edge of described diaphragm 14 is compressed by upper and lower valve body 1,2, and diaphragm 14 is separated the inner chamber of upper valve body 1 and the upper chamber 2a of following valve body 2.The lower end butt of the upper end of described fixed block 13 and first spring 5, the lower end of the upper end of first spring 5 and pressure pad 4 is fixed.Be equipped with adjustment screw 3 from top to bottom at the top of described upper valve body 1, this adjusts screw 3 and upper valve body 1 threaded engagement, adjusts the lower end of screw 3 and stretches into the inner chamber of upper valve body 1, and be pressed on the end face of pressure pad 4.
Operation principle of the present utility model is as follows:
Liquid enters down the lower chamber 2b of valve body 2 by liquid inlet joint 6, because first spring 5 can produce a downward pressure by 13 pairs of pivot pins of fixed block 10, the elastic force that this pressure surpasses second spring 11 allows pivot pin 10 move down with fluid pressure with joint efforts, and second sealing ring 16 can not be sealed, the spindle nose of pivot pin 10 is opened the centre bore of fixed cup 8 at this moment, so the liquid that liquid inlet joint 6 enters can enter down the upper chamber 2a of valve body 2 by the centre bore of fixed cup 8, can produce certain upward pressure (suppose this fluid joint 7 of valve body 2 stop up fully) at present to diaphragm 14 owing to enter the liquid of upper chamber 2a, fluid pressure that should be upwards and the elastic force of second spring 11 is formed can overcome the downward pressure of first spring 5 with joint efforts gradually and pivot pin 10 is moved up, the conical surface between pivot pin 10 spindle noses and axle body stretches in the centre bore of second sealing ring 16, with the complete shutoff of the centre bore of fixed cup 8, the upper chamber 2a of following valve body 2 and lower chamber 2b isolate (when following valve body fluid joint 7 stopped up, upper chamber 2a was the maximum pressure in air relief valve exit to the pressure at fluid joint 7 places); When if open in fluid joint 7 exits of following valve body 2, because the pressure in the valve body upper chamber 2a descends down, the equilibrium point of first spring force and second spring, fluid pressure is destroyed, so first spring 5 can make pivot pin 10 move down, make the flow direction fluid joint 7 at liquid inlet joint 6 places, pressure in valve body fluid joint 7 exits can be less than the pressure of outlet be stopped up fully the time at present for this.
Claims (5)
1. a hemodialysis is with from resetting air relief valve, the fixing valve body (2) down in the lower end of upper valve body (1), the top of upper valve body (1) is equipped with from top to bottom adjusts screw (3), the inner chamber of upper valve body (1) is stretched in the lower end of this adjustment screw (3), and be pressed on the end face of pressure pad (4), the upper end of the lower end of pressure pad (4) and first spring (5) is fixed, be provided with liquid inlet joint (6) and fluid joint (7) on the valve body (2) down described, have upper chamber (2a) and lower chamber (2b) in the following valve body (2), wherein upper chamber (2a) is communicated with the endoporus of fluid joint (7), lower chamber (2b) is communicated with the endoporus of liquid inlet joint (6), and on, lower chamber (2a, communicate by aperture 2b), it is characterized in that: fixed cup (8) is installed in described aperture, the lower end of this fixed cup (8) embeds in the inner chamber of holder (9), holder (9) is positioned at lower chamber (2b), and the inner chamber of holder (9) is communicated with the endoporus of liquid inlet joint (6); In the centre bore of described fixed cup (8), be equipped with pivot pin (10), the centre bore matched in clearance of this pivot pin (10) and fixed cup (8), the spindle nose of pivot pin (10) is arranged in the inner chamber of holder (9), and can be with the centre bore shutoff of fixed cup (8), on described pivot pin (10), be set with second spring (11), step surface butt in the lower end of this second spring (11) and fixed cup (8) centre bore, the snap ring (12) that the upper end of second spring (11) and pivot pin (10) top are provided with connects, the lower end butt of the upper end of described pivot pin (10) and fixed block (13), the lower end butt of the upper end of fixed block (13) and first spring (5); Middle part at described fixed block (13) is provided with annular groove, and diaphragm (14) is installed in this annular groove, and the edge of described diaphragm (14) is compressed by upper and lower valve body (1,2).
2. hemodialysis according to claim 1 is characterized in that: between described fixed cup (8) and following valve body (2) first sealing ring (15) is installed with from resetting air relief valve.
3. hemodialysis according to claim 1 and 2 is with from the air relief valve that resets, it is characterized in that: between described fixed cup (8) and holder (9), second sealing ring (16) is installed, the centre bore of this second sealing ring (16) is over against the centre bore of fixed cup (8), and the spindle nose of described pivot pin (10) cooperates by the centre bore of the conical surface with second sealing ring (16).
4. hemodialysis according to claim 1 is with from the air relief valve that resets, and it is characterized in that: between described holder (9) and following valve body (2) the 3rd sealing ring (17) is installed, the 3rd sealing ring (17) is lower than the endoporus of liquid inlet joint (6).
According to claim 1 or 4 described hemodialysis with from resetting air relief valve, it is characterized in that: be fixed with shrouding (18) in the described bottom of valve body (2) down, this shrouding (18) is with the lower port sealing of lower chamber (2b), the lower end of described holder (9) embeds in the shrouding (18), and both are fixed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200271414U CN201996893U (en) | 2011-01-27 | 2011-01-27 | Self-resetting pressure reducing valve for hemodialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200271414U CN201996893U (en) | 2011-01-27 | 2011-01-27 | Self-resetting pressure reducing valve for hemodialysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201996893U true CN201996893U (en) | 2011-10-05 |
Family
ID=44699673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200271414U Expired - Lifetime CN201996893U (en) | 2011-01-27 | 2011-01-27 | Self-resetting pressure reducing valve for hemodialysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201996893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125706A (en) * | 2011-01-27 | 2011-07-20 | 重庆山外山科技有限公司 | Self reset pressure relief valve for hemodialysis |
-
2011
- 2011-01-27 CN CN2011200271414U patent/CN201996893U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125706A (en) * | 2011-01-27 | 2011-07-20 | 重庆山外山科技有限公司 | Self reset pressure relief valve for hemodialysis |
| CN102125706B (en) * | 2011-01-27 | 2012-10-10 | 重庆山外山科技有限公司 | Self reset pressure relief valve for hemodialysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20121010 |