CN112933315A

CN112933315A - Pressure regulating device for hemodialysis machine

Info

Publication number: CN112933315A
Application number: CN202110136794.4A
Authority: CN
Inventors: 徐晓燕; 潘晓琼; 金领微; 郑育�; 赵艳玲; 叶菡洋
Original assignee: Second Affiliated Hospital and Yuying Childrens Hospital of Wenzhou Medical University
Current assignee: Second Affiliated Hospital and Yuying Childrens Hospital of Wenzhou Medical University
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-06-11

Abstract

The invention relates to a pressure regulating device for a hemodialysis machine, which comprises an upper valve body, a lower valve body and a spring, wherein a diaphragm is arranged between the upper valve body and the lower valve body, the diaphragm is matched with the upper valve body to form an upper cavity, the diaphragm is matched with the lower valve body to form a lower cavity, a liquid outlet pipeline communicated with the upper cavity is arranged on the upper valve body, a liquid inlet pipeline communicated with the lower cavity is arranged at the lower end of the lower valve body, the diaphragm is matched and positioned by a cavity wall of the upper valve body and a limiting frame in the lower valve body, an inner cavity at one end, close to the lower valve body, of the upper valve body is arranged in a conical shape, the limiting frame comprises a positioning ring and a plurality of convex ribs distributed around the circumference of the positioning ring, the positioning ring is arranged close to one end of the upper valve body, the lower end of each convex rib. By adopting the technical scheme, the invention provides the pressure regulating device for the hemodialysis machine, which has the advantages of simple and compact structure, small volume, easy assembly and good reliability.

Description

Pressure regulating device for hemodialysis machine

Technical Field

The invention relates to the field of medical dialysis, in particular to a pressure regulating device for a hemodialysis machine.

Background

The pressure reducing valve is an important part on the hemodialysis machine and plays a role in regulating and controlling the pressure of the pipeline. At present, the relief pressure valve that uses on the hemodialysis machine generally comprises valve body and spring case subassembly, and the not enough that exists lies in: the spring can soak in the fluid in the use, easily rust, became invalid or polluted the fluid, and the volume is great, and the processing degree of difficulty is big, and the cost of manufacture is high.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides the pressure regulating device for the hemodialysis machine, which is simple in structure and reliable.

The technical scheme of the invention is as follows: the utility model provides a pressure regulating device for hemodialysis machine, includes valve body, lower valve body and spring, go up the valve body and install the diaphragm down between the valve body, diaphragm and last valve body cooperation constitute the cavity, diaphragm and lower valve body cooperation constitute cavity down, upward be equipped with the liquid outlet pipe who switches on with last cavity on the valve body, the lower extreme of valve body is equipped with the inlet liquid pipeline who switches on with cavity down, the diaphragm is fixed a position by the chamber wall of last valve body and the spacing frame cooperation in the valve body down, the inner chamber that goes up the valve body and be close to lower valve body one end is the toper setting, spacing frame includes the holding ring and around a plurality of protruding muscle of holding ring circumference distribution, the holding ring is close to last valve body one end and sets up, and each protruding muscle lower extreme is connected on the chamber wall of valve body down, and the upper portion of protruding muscle sets up for the lower part leanin, and adjacent protruding muscle interval sets up and forms the through-hole, the, the pressure regulating cover is provided with a supporting seat and a pressure regulating block, the supporting seat is arranged on the pressure regulating cover, the spring is positioned between the supporting seat and the pressure regulating block, and the diaphragm and the pressure regulating plate move synchronously.

By adopting the technical scheme, the diaphragm is controlled to be opened in a single direction under the combined action of the cavity wall of the upper valve body and the limiting frame in the lower valve body, after liquid enters the lower cavity of the lower valve body through the liquid inlet connector, the downward pressure is generated on the diaphragm due to the spring, the diaphragm can move downwards and the middle part of the diaphragm is tightly attached to the positioning ring, the edge of the diaphragm deforms towards the edge of the convex rib under the impact of the liquid, the liquid in the lower cavity can enter the upper cavity through the gap between the edge of the diaphragm and the cavity, and the upward pressure can gradually overcome the downward pressure of the spring and enable the diaphragm to move upwards due to the fact that the entering liquid can generate certain upward pressure on the diaphragm until the diaphragm is attached and sealed with the cavity wall of the upper valve body, so that the upper cavity and the lower cavity are isolated;

the inner cavity of the lower part of the upper valve body is conical and is matched with the edge of the diaphragm, the sealing performance is good, and liquid is effectively prevented from entering the upper valve body.

Compared with the traditional structure, the invention has the advantages of simple and compact structure, small volume, easy assembly, good reliability and low manufacturing cost; meanwhile, the spring is completely isolated from the fluid, and the rust or the fluid pollution cannot happen.

The invention further provides that: also comprises a joint body, two ends of the joint body are respectively provided with a liquid inlet connecting piece and a liquid outlet connecting piece, the liquid inlet connecting piece is connected with a liquid inlet pipeline of the lower valve body, the liquid outlet connecting piece is connected with a liquid outlet pipeline of the upper valve body, one side of the joint body is provided with an adapter, a first leading-in channel and a first leading-out channel are arranged in the joint body along the axial direction, a second leading-in channel A and a second leading-out channel A are arranged in the radial direction, the second leading-in channel A is communicated with the first leading-in channel, the second leading-out channel A is communicated with the first leading-out channel, the adapter and the adapter body are arranged in a split way, a second leading-in channel B and a second leading-out channel B are arranged in the adapter along the radial direction, the second inlet channel B may be in butt joint with the second inlet channel a, and the second outlet channel B may be in butt joint with the second outlet channel a.

By adopting the above further arrangement, the adapter body is communicated and arranged on the valve body, and the adapter can be disassembled and replaced, so that the product can ensure that the sodium bicarbonate dry powder bag of the Fresenius type can be directly used on the Gambro type after being switched by the adapter.

The invention further provides that: a clamping piece A is arranged in the second leading-in channel B, the clamping piece A comprises a mounting ring A and a plurality of elastic clamping pieces A which are integrally arranged at the outer side end of the mounting ring A, the mounting ring A and the adapter are fixed or integrally arranged, the elastic clamping pieces A are arranged at intervals around the mounting ring A to form a jacket A, the part of the jacket A is positioned outside the second leading-in channel B, a sealing sleeve A is arranged at the inner periphery of the jacket A, a clamping piece B is arranged in the second leading-out channel B, the clamping piece B comprises a mounting ring B and a plurality of elastic clamping pieces B which are integrally arranged at the outer side end of the mounting ring B, the mounting ring B and the adapter are fixed or integrally arranged, the elastic clamping pieces B are arranged at intervals around the mounting ring B to form a jacket B, the part of the jacket B is positioned outside the second leading-out channel B, a sealing sleeve B is arranged at the inner periphery of the jacket B, a, the inner parts of the plugs are provided with a clamping cavity A matched with the clamping sleeve A and a clamping cavity B matched with the clamping sleeve B, the inner walls of the clamping cavity A and the clamping cavity B are both provided with curved surfaces for tightening the corresponding sealing sleeves, and the plugs comprise two arc-shaped plugs connected with each other.

Adopt the aforesaid to further set up again, wear to establish back in seal cover A and the seal cover B respectively with two connecting tubes, establish two arc closure pieces at the outer card of adapter, constitute the end cap after two arc closure pieces are connected, with the end cap to adapter one side screw in, inwards extrude respectively through the curved surface of pressing from both sides chamber A and pressing from both sides chamber B and press from both sides cover A and cover B and make it tighten up the seal cover to realize the seal cover and contradict to two sealed connections switch on.

The invention further provides that: the upper and lower both ends of the connector body are provided with the feed liquor connecting piece respectively and go out the liquid connecting piece, the feed liquor connecting piece including connect A, connect B and connecting pipe, connect A install on the feed liquor pipeline, connect B cover to establish on the connecting pipe, connecting pipe one end is worn out and is connected B back and connect A fixed, connect B and connecting pipe pass through the shoulder rank cooperation and realize connecting B's axial fixity.

By adopting the above further arrangement, the liquid outlet connecting piece has a simple structure, and the first joint B can rotate and is convenient to install.

The invention further provides that: the connecting pipe is sealed with the joint A through a sealing ring, and the connecting pipe is sealed with the joint B through a sealing ring.

Adopt above-mentioned further setting again, through the sealing washer is sealed, avoid leaking from the gap between two parts.

The invention further provides that: the improved valve is characterized in that an upper annular groove is formed in the pressure regulating cover, an annular sealing piece A is arranged in the upper annular groove, an upper annular abutting block is arranged on the upper valve body and is abutted to the annular sealing piece A, a lower annular groove is formed in the upper valve body, an annular sealing piece B is arranged in the lower annular groove, a lower annular abutting block is arranged on the pressure regulating cover, and the lower annular abutting block is abutted to the annular sealing piece B.

By adopting the above further arrangement, the pressure regulating cover and the upper valve body are sealed by the double steps, so that the liquid in the cavity is prevented from flowing outwards.

The invention further provides that: pressure regulating dish lower part an organic whole is provided with the leather cup, the leather cup facial make-up is equipped with fixed stopper, the one end that fixed stopper is close to the leather cup is equipped with the boss, and the external diameter of boss is greater than fixed stopper external diameter and forms shoulder rank, and leather cup upper portion is equipped with and supplies boss male cavity, the leather cup lower part is equipped with annular conflict platform, thereby annular conflict platform can constitute conflict cooperation with shoulder rank and restrict the boss and break away from the cavity, be connected through the body of rod between diaphragm and the fixed stopper, one of them and the body of rod of fixed stopper and diaphragm are for dismantling and be connected.

Adopt above-mentioned further setting again, fixed stopper and leather cup between connection structure simple, one of them is connected for dismantling with the body of rod for fixed stopper and diaphragm, be convenient for install.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is a block diagram of a connector body in an embodiment of the invention;

figure 3 is an assembly view of a plug and adapter in accordance with an embodiment of the present invention;

FIG. 4 is a diagram of one side of a stop bracket according to an embodiment of the present invention;

FIG. 5 is a block diagram of a feed connection according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion I of FIG. 1;

FIG. 7 is an assembly view of a diaphragm and pressure adjustment disk in an embodiment of the present invention.

The valve comprises an upper valve body 100, a lower valve body 200, a spring 300, a diaphragm 400, an upper chamber 110, a lower chamber 210, a liquid outlet pipeline 120, a liquid inlet pipeline 220, a limiting frame 230, a positioning ring 231, a convex rib 232, a through hole 233, a pressure regulating cover 500, a pressure regulating disc 510, a supporting seat 520, a pressure regulating block 530, a connector body 600, a liquid inlet connector 610, a liquid outlet connector 620, a connector 630, a first leading-in channel 621, a first leading-out channel 622, a second leading-in channel A623, a second leading-out channel A624, a second leading-in channel B631, a second leading-out channel B632, a mounting ring A711, an elastic clamping piece A712, a sealing sleeve A810, a mounting ring B721, an elastic clamping piece B722, a sealing sleeve B820, a plug 900, a clamping cavity A910, a clamping cavity; the connecting rod comprises a connector A611, a connector B612, a connecting pipe 613, an annular groove 540, an annular sealing piece A550, an annular pressing block 130, a lower annular groove 140, an annular sealing piece B150, a lower annular pressing block 560, a cup 511, a fixing plug 570, a boss 571, a shoulder 572, a cavity 512, an annular abutting table 513 and a rod body 410.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the descriptions in this invention as to "first", "second", "a", "B", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. In the description of the present invention, "a number" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1-7, the pressure regulating device for hemodialysis machine of the present invention comprises an upper valve body 100, a lower valve body 200 and a spring 300, wherein a membrane 400 is installed between the upper valve body 100 and the lower valve body 200, the membrane 400 cooperates with the upper valve body 100 to form an upper chamber 110, the membrane 400 cooperates with the lower valve body 200 to form a lower chamber 210, the upper valve body 100 is provided with a liquid outlet pipe 120 communicated with the upper chamber 110, the lower end of the lower valve body 200 is provided with a liquid inlet pipe 220 communicated with the lower chamber 210, the membrane 400 cooperates and positions by the cavity wall of the upper valve body 100 and a limiting frame 230 in the lower valve body 200, the inner cavity of the upper valve body 100 near one end of the lower valve body 200 is conically arranged, the limiting frame 230 comprises a positioning ring 231 and a plurality of convex ribs 232 distributed around the circumference of the positioning ring 231, the positioning ring 231 near one end of the upper valve body 100, the lower ends of the convex ribs 232 are connected to, the upper parts of the ribs 232 are arranged inwards obliquely relative to the lower parts, through holes 233 are formed by arranging the adjacent ribs 232 at intervals, a pressure regulating cover 500 is arranged on the upper end part of the upper valve body 100, a pressure regulating disc 510 is arranged between the pressure regulating cover 500 and the upper valve body 100, a supporting seat 520 and a pressure regulating block 530 are arranged in the pressure regulating cover 500, the supporting seat 520 is arranged on the pressure regulating disc 510, the spring 300 is positioned between the supporting seat 520 and the pressure regulating block 530, and the diaphragm 400 and the pressure regulating disc 510 move synchronously; the liquid inlet connector 610 is connected with the liquid inlet pipeline 220 of the lower valve body 200, the liquid outlet connector 620 is connected with the liquid outlet pipeline 120 of the upper valve body 100, a connector 630 is arranged on one side of the connector body 600, a first leading-in channel 621 and a first leading-out channel 622 are axially arranged in the connector body 600, a second leading-in channel A623 and a second leading-out channel A624 are radially arranged, the second leading-in channel A623 is communicated with the first leading-in channel 621, the second leading-out channel A624 is communicated with the first leading-out channel 623, the connector 610 and the connector body 600 are separately arranged, a second leading-in channel B631 and a second leading-out channel B632 are radially arranged in the connector 610, and the second leading-in channel B631 can be in butt joint with the second leading-in channel A623, the second export channel B632 may interface with the second export channel a 624; a clamping piece A is arranged in the second leading-in channel B631, the clamping piece A710 comprises an installation ring A711 and a plurality of elastic clamping pieces A712 integrally arranged at the outer side end of the installation ring A712, the installation ring A712 and the adapter 610 are fixed or integrally arranged, the elastic clamping pieces A712 are arranged at intervals around the installation ring A712 to form a jacket A, the part of the jacket A is positioned outside the second leading-in channel B631, a sealing sleeve A810 is arranged on the inner periphery of the jacket A, a clamping piece B is arranged in the second leading-out channel B632, the clamping piece B720 comprises an installation ring B721 and a plurality of elastic clamping pieces B722 integrally arranged at the outer side end of the installation ring B721, the installation ring B721 and the adapter 610 are fixed or integrally arranged, the elastic clamping pieces B722 are arranged at intervals around the installation ring B721 to form a jacket B, the part of the jacket B is positioned outside the second leading-out channel B, a sealing sleeve B820 is arranged on the inner periphery of a jacket B, a plug 900 is sleeved on the outer periphery of the adapter 610, the plug 900 is in threaded fit with the adapter 610, a clamping cavity A910 capable of being matched with the jacket A and a clamping cavity B920 matched with the jacket B are arranged inside the plug 900, curved surfaces for tightening corresponding sealing sleeves are arranged on the inner walls of the clamping cavity A910 and the clamping cavity B920, and the plug 900 comprises two arc-shaped plugging pieces 940 which are connected with each other; the liquid inlet connector 610 comprises a joint A611, a joint B612 and a connecting pipe 613, the joint A611 is arranged on the liquid inlet pipeline 220, the joint B612 is sleeved on the connecting pipe 613, one end of the connecting pipe 613 penetrates through the joint B612 and then is fixed with the joint A611, and the joint B612 and the connecting pipe 613 are matched through a shoulder step to realize the axial fixation of the joint B612; the connecting pipe 613 and the joint A611 are sealed by a sealing ring, and the connecting pipe 613 and the joint B612 are sealed by a sealing ring; an upper annular groove 540 is formed in the pressure regulating cover 500, an annular sealing piece A550 is arranged in the annular upper groove 540, an upper annular pressing block 130 is arranged on the upper valve body 100, the upper annular pressing block 130 is abutted against the annular sealing piece A550, a lower annular groove 140 is formed in the upper valve body 100, an annular sealing piece B150 is arranged in the lower annular groove 140, a lower annular pressing block 560 is arranged on the pressure regulating cover 500, and the lower annular pressing block 560 is abutted against the annular sealing piece B150; the lower portion of the pressure regulating disc 510 is integrally provided with a leather cup 511, a fixing plug 570 is arranged on the leather cup 511, a boss 571 is arranged at one end, close to the leather cup 511, of the fixing plug 570, the outer diameter of the boss 571 is larger than that of the fixing plug 570 to form a shoulder 572, a cavity 512 into which the boss 571 is inserted is arranged at the upper portion of the leather cup 511, an annular abutting table 513 is arranged at the lower portion of the leather cup 511, the annular abutting table 513 can be in abutting fit with the shoulder 572 to limit the boss 571 from being separated from the cavity 512, the diaphragm 400 is connected with the fixing plug 570 through a rod body 410, and one of the fixing plug 570 and the diaphragm 400 is detachably connected with the rod body 410.

The diaphragm is controlled to be opened in a single direction under the combined action of the cavity wall of the upper valve body and the limiting frame in the lower valve body, after liquid enters the lower cavity of the lower valve body through the liquid inlet connector, because the spring can generate downward pressure on the diaphragm, the diaphragm can move downward under the pressure, the middle part of the diaphragm is tightly attached to the positioning ring, the edge of the diaphragm deforms towards the edge of the convex rib under the impact of the liquid, the liquid in the lower cavity can enter the upper cavity through a gap between the edge of the diaphragm and the cavity, and because the entering liquid can generate certain upward pressure on the diaphragm, the upward pressure can gradually overcome the downward pressure of the spring and enable the diaphragm to move upward until the diaphragm is attached and sealed with the cavity wall of the upper valve body, so that the upper cavity and the lower cavity are isolated;

The adapter is detachably replaced by the connector body which is communicated with the valve body, so that the product can ensure that the sodium bicarbonate dry powder bag of the Fresenius model can be directly used on the Gambro model after being switched by the adapter.

Wear to establish back in seal cover A and the seal cover B respectively with two connecting tube, establish two arc closure pieces at the outer card of adapter, constitute the end cap after two arc closure pieces are connected, with the end cap to adapter one side screw in, inwards extrude respectively through the curved surface of pressing from both sides chamber A and pressing from both sides chamber B and press from both sides cover A and cover B and make it tighten up the seal cover to realize the seal cover and connect the sealed conflict that switches on to two connections.

Claims

1. The utility model provides a pressure regulating device for hemodialysis machine, includes valve body, lower valve body and spring, its characterized in that: the upper valve body and the lower valve body are provided with a diaphragm, the diaphragm and the upper valve body are matched to form an upper cavity, the diaphragm and the lower valve body are matched to form a lower cavity, the upper valve body is provided with a liquid outlet pipeline communicated with the upper cavity, the lower end of the lower valve body is provided with a liquid inlet pipeline communicated with the lower cavity, the diaphragm is matched and positioned by the cavity wall of the upper valve body and a limiting frame in the lower valve body, the inner cavity of the upper valve body close to one end of the lower valve body is in a conical shape, the limiting frame comprises a positioning ring and a plurality of convex ribs distributed around the circumference of the positioning ring, the positioning ring is close to one end of the upper valve body, the lower ends of the convex ribs are connected to the cavity wall of the lower valve body, the upper parts of the convex ribs are inclined inwards relative to the lower part, the adjacent convex ribs are arranged at intervals to form through holes, the upper end part of the, the pressure regulating cover is internally provided with a supporting seat and a pressure regulating block, the supporting seat is arranged on the pressure regulating plate, the spring is positioned between the supporting seat and the pressure regulating block, and the diaphragm and the pressure regulating plate synchronously move.

2. The pressure regulating device for a hemodialysis machine according to claim 1, wherein: also comprises a joint body, two ends of the joint body are respectively provided with a liquid inlet connecting piece and a liquid outlet connecting piece, the liquid inlet connecting piece is connected with a liquid inlet pipeline of the lower valve body, the liquid outlet connecting piece is connected with a liquid outlet pipeline of the upper valve body, one side of the joint body is provided with an adapter, a first leading-in channel and a first leading-out channel are arranged in the joint body along the axial direction, a second leading-in channel A and a second leading-out channel A are arranged in the radial direction, the second leading-in channel A is communicated with the first leading-in channel, the second leading-out channel A is communicated with the first leading-out channel, the adapter and the adapter body are arranged in a split way, a second leading-in channel B and a second leading-out channel B are arranged in the adapter along the radial direction, the second inlet channel B may be in butt joint with the second inlet channel a, and the second outlet channel B may be in butt joint with the second outlet channel a.

3. The pressure regulating device for a hemodialysis machine according to claim 2, wherein: a clamping piece A is arranged in the second leading-in channel B, the clamping piece A comprises a mounting ring A and a plurality of elastic clamping pieces A which are integrally arranged at the outer side end of the mounting ring A, the mounting ring A and the adapter are fixed or integrally arranged, the elastic clamping pieces A are arranged at intervals around the mounting ring A to form a jacket A, the part of the jacket A is positioned outside the second leading-in channel B, a sealing sleeve A is arranged at the inner periphery of the jacket A, a clamping piece B is arranged in the second leading-out channel B, the clamping piece B comprises a mounting ring B and a plurality of elastic clamping pieces B which are integrally arranged at the outer side end of the mounting ring B, the mounting ring B and the adapter are fixed or integrally arranged, the elastic clamping pieces B are arranged at intervals around the mounting ring B to form a jacket B, the part of the jacket B is positioned outside the second leading-out channel B, a sealing sleeve B is arranged at the inner periphery of the jacket B, a, the inner parts of the plugs are provided with a clamping cavity A matched with the clamping sleeve A and a clamping cavity B matched with the clamping sleeve B, the inner walls of the clamping cavity A and the clamping cavity B are both provided with curved surfaces for tightening the corresponding sealing sleeves, and the plugs comprise two arc-shaped plugs connected with each other.

4. The pressure regulating device for a hemodialysis machine according to claim 2 or 3, wherein: the feed liquor connecting piece including connect A, connect B and connecting pipe, connect A install on the feed liquor pipeline, connect B cover to establish on the connecting pipe, connecting pipe one end is worn out and is connected B back and fixed with connecting A, connect B and connecting pipe pass through shoulder rank cooperation and realize connecting B's axial fixity.

5. The pressure regulating device for a hemodialysis machine according to claim 4, wherein: the connecting pipe is sealed with the joint A through a sealing ring, and the connecting pipe is sealed with the joint B through a sealing ring.

6. The pressure regulating device for a hemodialysis machine according to any one of claims 1 to 3, wherein: the improved valve is characterized in that an upper annular groove is formed in the pressure regulating cover, an annular sealing piece A is arranged in the upper annular groove, an upper annular abutting block is arranged on the upper valve body and is abutted to the annular sealing piece A, a lower annular groove is formed in the upper valve body, an annular sealing piece B is arranged in the lower annular groove, a lower annular abutting block is arranged on the pressure regulating cover, and the lower annular abutting block is abutted to the annular sealing piece B.

7. The pressure regulating device for a hemodialysis machine according to any one of claims 1 to 3, wherein: pressure regulating dish lower part an organic whole is provided with the leather cup, the leather cup facial make-up is equipped with fixed stopper, the one end that fixed stopper is close to the leather cup is equipped with the boss, and the external diameter of boss is greater than fixed stopper external diameter and forms shoulder rank, and leather cup upper portion is equipped with and supplies boss male cavity, the leather cup lower part is equipped with annular conflict platform, thereby annular conflict platform can constitute conflict cooperation with shoulder rank and restrict the boss and break away from the cavity, be connected through the body of rod between diaphragm and the fixed stopper, one of them and the body of rod of fixed stopper and diaphragm are for dismantling and be connected.