CN210114674U - Nutrition pump, infusion apparatus and control valve - Google Patents

Abstract

The utility model relates to a nutrition pump, an infusion apparatus and a control valve, which comprises a pump body and an infusion apparatus, wherein the infusion apparatus comprises a control valve, and a pump wheel is arranged on the pump body; the control valve comprises a valve body and a valve core which can be connected with the valve body in a matched mode, the valve body comprises a first input pipe and a second input pipe which are used for being connected with a to-be-infused liquid, a cylindrical structure and an output pipe which is used for outputting the to-be-infused liquid, one end of a switching shaft is connected with a motor, and the other end of the switching shaft is connected with the valve core so that the motor drives the valve core to rotate through the switching shaft. The utility model discloses can realize freely switching of two kinds of liquid, eliminate the cluster liquid risk that the nutrition pump fed the in-process, and with low costs, the precision is high.

Description

Nutrition pump, infusion apparatus and control valve

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a nutrition pump, transfusion system and control valve.

Background

The nutrition pump is a mechanical device for enteral nutrition infusion to a patient, using a disposable enteral nutrition set as a consumable. An automatic infusion device for accurately controlling the infusion speed and volume is used for infusing nutrient solution to a patient through a nutrient pump in clinic. At present, a disposable enteral nutrient solution infusion device generally adopts a single tube, the nutrient solution is generally thick, pipeline blockage easily occurs in the use process, a double-tube nutrient solution infusion device is used, one nutrient solution is infused, and the other cleaning solution is infused, so that the blockage of a pipeline can be effectively prevented, and the water can be supplemented to a patient. Double-barrelled nutrient solution transfusion system on the market at present uses in coordination with the nutrition pump, and the switching of nutrient solution and cleaning solution has two kinds of modes:

in the first mode, one of the extrusion pipelines is adopted to achieve the purpose of infusing the nutrient solution or the cleaning solution, and the scheme has the following defects:

1. in the process of storing the nutrient canal, the Robert clamp is in an open state, and in the process of filling nutrient solution, the Robert clamp must be closed first, otherwise the nutrient solution and the cleaning solution can be mixed. And the check valve is partially added to prevent the risk of liquid mixing caused by human errors, and the cost of pipeline production is increased (the precision requirement of the check valve is high).

2. A part of the nutrition pumps are not provided with a position sensor for detecting the liquid stopping clamp, the condition of stopping liquid in the extrusion pipeline is guaranteed only by a mechanical structure, and the conditions of abrasion and mechanical failure after long-term use are not considered.

The second method comprises the following steps: the three-way valve is adopted, the shaft is connected with the valve core, and the positions of the shaft and the valve core are detected to achieve the purpose of infusing the nutrient solution or the cleaning solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at thoroughly solving the problem of liquid mixing in the infusion process of nutrient solution and cleaning solution in the nutrient pump, simple to operate, easy operation.

The utility model discloses the purpose is realized through following technical scheme:

the utility model discloses a utility model point is to provide a nutrition pump, which comprises a pump body and an infusion apparatus, wherein the infusion apparatus comprises a control valve, and a pump impeller, two motors and two transfer shafts are arranged on the pump body; the control valve comprises a valve body and a valve core which can be matched and connected with the valve body, the valve body comprises a first input pipe and a second input pipe which are used for being connected with the liquid to be infused, a cylindrical structure and an output pipe which is used for outputting the liquid to be infused, and the cylindrical structure comprises a first cylindrical structure and a second cylindrical structure which are arranged in parallel side by side; the valve core comprises a first valve core which can be just accommodated in a first cylindrical structure and can rotate in the first cylindrical structure and a second valve core which can be just accommodated in a second cylindrical structure and can rotate in the second cylindrical structure; one end of the switching shaft is connected with the motor, and the other end of the switching shaft is connected with the valve core so that the motor drives the valve core to rotate through the switching shaft; a first through hole communicated with the first input pipe and a second through hole communicated with the output pipe are formed in the side wall of the first cylindrical structure, and correspondingly, a third through hole communicated with the second input pipe and a fourth through hole communicated with the output pipe are formed in the side wall of the second cylindrical structure; a first hole and a second hole which are communicated with each other are formed in the side wall of the first valve core, and a third hole and a fourth hole which are communicated with each other are formed in the side wall of the second valve core; when the two through holes in the cylindrical structure and the two holes in the valve core are respectively aligned one by one, liquid enters the output pipe through the valve core, and the valve core is opened; when the two through holes on the cylindrical structure are not aligned with the two holes on the valve core one by one, the liquid in the input pipe cannot enter the output pipe, and the valve core is closed.

Furthermore, a bent first communication pipe which is communicated with the first hole and the second hole is arranged in the first valve core so as to lead the liquid to pass through; and a bent second communicating pipe for communicating the third hole and the fourth hole is also arranged in the second valve core so as to allow the liquid to pass through.

Furthermore, the first hole and the second hole on the first valve core are two independent through holes distributed at 90 degrees, and the third hole and the fourth hole on the second valve core are also two independent through holes distributed at 90 degrees; correspondingly, the first through hole and the second through hole on the first tubular structure are two independent through holes distributed at 90 degrees, and the third through hole and the fourth through hole on the second tubular structure are also two independent through holes distributed at 90 degrees.

Furthermore, the centers of one end faces of the first valve core and the second valve core are respectively provided with a flat groove; the first cylindrical structure and the second cylindrical structure are horizontally arranged in the front-back direction, and the first input pipe and the second input pipe are respectively vertically arranged at the top of the first cylindrical structure and the top of the second cylindrical structure and are respectively communicated with the first through hole and the third through hole; the output pipe is vertically arranged in the center of the lower part of the first tubular structure and the second tubular structure, and the top end of the output pipe is positioned between the first tubular structure and the second tubular structure.

Furthermore, the first cylindrical structure and the second cylindrical structure are both cylindrical structures with open ends and closed ends, and the inner walls of the first cylindrical structure and the second cylindrical structure are both provided with at least one annular groove; the peripheries of the first valve core and the second valve core are respectively provided with an annular convex strip matched with the annular groove so that the valve cores can be fixedly connected in the cylindrical structure and can freely rotate in the cylindrical structure; the infusion apparatus further comprises a first upper guide pipe, a second upper guide pipe and a lower guide pipe, the first input pipe in the control valve is connected with the first upper guide pipe used for conveying liquid, the second input pipe is connected with the second upper guide pipe used for conveying liquid, and the output pipe is connected with the lower guide pipe so as to output the liquid from the lower guide pipe.

Furthermore, the wall of the opening of the first tubular structure and the wall of the opening of the second tubular structure are both provided with a first notch, the wall of the opening of one end of the first valve core and the wall of the opening of one end of the second valve core are both provided with a second notch, and in an initial state, the first notches of the first tubular structure and the second tubular structure are aligned with the second notches of the first valve core and the second valve core respectively.

Furthermore, the second notch and the flat groove are both positioned on the front side of the valve core, the second notch is communicated with the flat groove, and the depth of the second notch is smaller than that of the flat groove; the valve body further comprises a flat plate which is horizontally arranged, one end of the flat plate is fixedly connected to the peripheries of the first input pipe and the second input pipe and extends backwards to the outside of the first cylindrical structure and the second cylindrical structure, and the bottom surface of the flat plate is fixedly connected with the top end surfaces of the first cylindrical structure and the second cylindrical structure; the lower end face of the flat plate above the output pipe extends downwards to be fixedly connected with the top of the output pipe, and the upper end of the output pipe is located between the first tubular structure and the second tubular structure and is fixedly connected with the two tubular structures so that the control valve is integrated into a whole.

Furthermore, the adapter shaft comprises a body, the top end face of the body is detachably and fixedly connected with the motor, a positioning block protruding out of the bottom end face is transversely arranged in the center of the bottom end face of the body, one end of the positioning block extends outwards out of the body, and a shaft rod is fixedly arranged on the lower end face of the positioning block.

Further, the body includes the front and the back, the upper end of front is equipped with the mounting groove that is used for installing the control valve, the back is equipped with two circular bosss that are used for placing the switching axle corresponding to the place of mounting groove, every the central authorities of boss all are equipped with the fixed orifices that communicate in the mounting groove, the axostylus axostyle of switching axle passes the fixed orifices and is connected with the case in the mounting groove from the body back.

Furthermore, every all be equipped with two centrosymmetric or axisymmetric right angle convex surfaces on the boss, the arris of the right angle department of right angle convex surface flushes with the medial surface of fixed orifices.

Further, the axostylus axostyle sets up in the locating hole, and the locating piece is placed in the up end of boss to can use the axostylus axostyle to rotate at the up end of boss as the axis of rotation, two right-angle faces on the right-angle convex surface make the locating piece can only clockwise or anticlockwise rotation at 90 degrees within ranges.

Furthermore, a sensor is arranged on the outer side of each of the two bosses, the sensor can detect the position of the transfer shaft, and the state (opening/closing) of the valve core can be detected because the transfer shaft is connected with the valve core.

Further, when the positioning block enters the sensor, just one side edge of the positioning block is in contact with one right-angle side surface of the right-angle convex surface.

Further, all set up on the wall of the lower extreme both sides of mounting groove and hold just first tubular structure and second tubular structure's arc fixed slot, then when the control valve was in the mounting groove, the outside of first tubular structure and the outside of second tubular structure joint just in the fixed slot of both sides.

Another utility model is to provide an infusion device as mentioned above.

The utility model discloses a still another utility model is directed at providing a control valve as above.

The utility model has the advantages that:

the utility model discloses a nutrition pump is when case and valve body installation, and the breach of two case corresponds with the breach of valve body, and case one is in closing this moment, and one is in the open mode. No error occurs in mechanical or manual assembly, and the problem of liquid mixing is fundamentally avoided. And in the using process: the program control is to close the valve core first and then open the valve core to be opened, thus avoiding the problem of liquid leakage in the using process. And two kinds of liquid can realize freely switching, with low costs, the precision is high and stop the cluster liquid risk.

The two tubular structures and the control valve structures of the two valve cores ensure that the liquid inlet and the liquid outlet of the two liquids are not provided with one port, and basically no mixing, contamination and the like occur.

Through setting up the ingenious boss of structure, right angle convex surface, locating piece, axostylus axostyle and the mutually supporting between these several parts, can prevent to make mistakes to a great extent, in addition contain the circuit board of control chip or singlechip, the cooperation between the locating piece of sensor and outside extension for any mistake can not appear in the rotation of two spools, the error can not appear even, and the accuracy is very high. In addition, by aligning the second notch on the valve core and the first notch on the cylindrical structure in the initial state, the accurate alignment in the beginning is ensured, and the risk of later error is avoided. Then the potential for cross-flow is avoided.

The utility model provides a control valve integrated level is high, forms a firm organic whole, and dull and stereotyped setting has not only increased the wholeness of control valve and can also supply the user to dismantle control valve, result of use greatly increased as handheld board.

Furthermore, the utility model provides an infusion apparatus collection is as consumptive material part, and each part in the infusion apparatus is convenient to be assembled, and the infusion apparatus is easy with pump body dismouting, excellent in use effect.

The utility model discloses the required precision of pairing rotation angle and stop position need not very accurate, so can further reduce cost, and avoid the emergence of error or mistake, just also avoided the condition of the cluster liquid that probably takes place.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a control valve according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a control valve according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of the valve body;

FIG. 4 is a top view of the valve body;

FIG. 5 is a right side view of the valve body;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a sectional view taken along line A-A of FIG. 5;

FIG. 8 is a perspective view of the first valve core;

FIG. 9 is a top view of the first valve spool;

FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 9;

FIG. 12 is a schematic structural view of an infusion set;

FIG. 13 is another schematic view of the infusion set;

FIG. 14 is a schematic front view of the nutrition pump;

FIG. 15 is a front view of the pump body;

FIG. 16 is a schematic perspective view of the front side of the pump body;

FIG. 17 is a schematic perspective view of the back of the pump body;

FIG. 18 is a schematic structural view of the transfer shaft;

FIG. 19 is a rear elevation view in longitudinal section of the pump body;

FIG. 20 is a schematic view of the connection of the spindle to the sensor;

fig. 21 is a schematic cross-sectional structure diagram of the infusion set.

In the figure, 1, a pump body, 2, a mounting groove, 3, a conduit groove, 4, a fixing hole, 5, a boss, 6, a right-angled convex surface, 7, a U-shaped groove, 8, a circuit board, 9, a fixing groove, 10, a control valve, 11, a first upper conduit, 12, a second upper conduit, 13, a nutrient solution, 14, a cleaning solution, 15, a rubber tube, 16, a first two-way port, 17, a first conduit, 18, a Y-shaped three-way port, 19, a second conduit, 20, a joint, 21, a liquid stopping clamp, 22, a third conduit, 23, a second two-way port, 24, a puncture outfit, 25, a lower conduit, 26, a bearing, 27, a switching shaft, 28, a body, 29, a positioning block, 30, a shaft rod, 31, a flat head, 32, a bubble detection device, 33, a pressure detection device, 34, a pump impeller, 35, a motor, 100, a first valve core, 101, a second valve core, 102, a first connection pipe, 103, a second communication, 104. the first hole, 105, the second hole, 106, the annular convex strip, 107, the second gap, 108, the flat groove, 111, the first cylindrical structure, 112, the second cylindrical structure, 113, the first input tube, 114, the second input tube, 115, the output tube, 116, the flat plate, 117, the convex rib, 118, the annular groove, 119, the first gap, 120, the first through hole, 121, the third through hole, 122, the second through hole, 123, the fourth through hole, 124 and the blocking piece.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the invention.

In the present invention, all the descriptions relating to the "tubular structure" refer to the first tubular structure and/or the second tubular structure; the description relating to "input pipes" refers to the first input pipe and/or the second input pipe; descriptions relating to "spools" all refer to first and/or second spools; the description referring to "through hole" refers to the first through hole, the second through hole, the third through hole and/or the fourth through hole, if the foregoing has specific limitations, the description may refer to the first through hole and/or the second through hole, or the third through hole and/or the fourth through hole, depending on the foregoing limitations; the description referring to "hole" refers to the first hole, the second hole, the third hole and/or the fourth hole, and if specifically defined above, may refer to the first hole and/or the second hole, or to the third hole and/or the fourth hole, depending on the previous definition.

The following is further described with reference to the accompanying drawings: since the second valve spool has the same structure as the first valve spool, only the structural schematic diagram of the first valve spool is shown in fig. 8 and 9, and the second valve spool is omitted. FIG. 16 is a schematic perspective view of the pump body (seen as the front face of the pump body); FIG. 17 is a schematic perspective view of the pump body (seen from the back side of the pump body) without the shaft 27, motor, etc. components; fig. 20 is a schematic diagram of the connection of the adapter shaft 27 to the sensor, wherein the bearing 26 is sleeved on the shaft 30 on the left side, and the bearing 26 is not shown on the shaft 30 on the right side; the control valve in fig. 21 is not shown.

Example 1

1-11, the control valve 10 comprises a valve body and a valve core which can be matched and connected with the valve body, wherein the valve body comprises a first input pipe 113, a second input pipe 114, an output pipe 115, a first cylindrical structure 111 and a second cylindrical structure 112 which are arranged in parallel side by side; the valve spools include a first valve spool 100 capable of being snugly received in a first cylindrical structure 111 and a second valve spool 101 capable of being snugly received in a second cylindrical structure 112; the inner walls of the cross sections of the first cylindrical structure 111 and the second cylindrical structure 112 are both circular, and the outer walls of the cross sections of the first valve spool 100 and the second valve spool 101 are both circular, so that the valve spools can freely rotate in the cylindrical structures.

A first through hole 120 respectively communicated with the first input pipe 113 and a second through hole 122 respectively communicated with the output pipe 115 are arranged on the side wall of the first cylindrical structure 111, and correspondingly, a third through hole 121 respectively communicated with the second input pipe 114 and a fourth through hole 123 respectively communicated with the output pipe 115 are arranged on the side wall of the second cylindrical structure 112.

The first spool 100 is just accommodated in the first cylindrical structure 111, and the first spool 100 is rotatable in the first cylindrical structure 111; the second spool 101 is snugly received in the second cylindrical structure 112, and the second spool 101 is rotatable in the second cylindrical structure 112.

A first hole 104 and a second hole 105 which are communicated with each other are formed on a side wall of the first valve core 100, and a third hole and a fourth hole which are communicated with each other are formed on a side wall of the second valve core 101.

When two through holes on the first cylindrical structure 111 and two holes on the first valve core 100 are aligned one by one, the liquid in the first input pipe 113 enters the output pipe 115 through the first valve core 100 to open the valve core; when the two through holes on the first cylindrical structure 111 are not aligned with the two holes on the first valve core 100 one by one, the liquid in the first input pipe 113 cannot enter the output pipe 115 to close the valve core; correspondingly, when the two through holes on the second cylindrical structure 112 and the two holes on the second valve core 101 are aligned one by one, the liquid in the second input pipe 114 enters the output pipe 115 through the second valve core 101 to realize the opening of the valve core; when the two through holes of the second cylindrical structure 112 are not aligned with the two holes of the second valve spool 101, the liquid in the second input pipe 114 cannot enter the output pipe 115 to close the valve spool.

A first bent communication pipe 102 communicating the first hole 104 and the second hole 105 is provided in the first valve body 100 to allow liquid to pass therethrough; a bent second communication pipe 103 communicating the third port and the fourth port is also provided in the second valve body 101 to allow the liquid to pass therethrough.

The first hole 104 and the second hole 105 on the first valve core 100 are two independent through holes distributed at 90 degrees, and the third hole and the fourth hole on the second valve core 101 are also two independent through holes distributed at 90 degrees; as shown in fig. 11, two holes correspond to two ends distributed in a quarter of a circular arc.

Correspondingly, the first through hole 120 and the second through hole 122 on the first cylindrical structure 111 are two independent through holes distributed at 90 degrees, and the third through hole 121 and the fourth through hole 123 on the second cylindrical structure 112 are also two independent through holes distributed at 90 degrees;

this enables the valve cartridge and the bore in the barrel to be aligned one-to-one.

The bending angle α of the communicating pipe is 90-130 degrees, such as 90 degrees, 95 degrees, 100 degrees, when flowing into the output pipe 115 from the bending position of the communicating pipe, the communicating pipe flows in a parallel or oblique downward mode, no effusion is generated, the flowing smoothly passes through the communicating pipe, the effusion is generated when the angle is too small, or the flow rate is slow, and the flow rate is too large when the angle is too large, so that the effect is not controlled well.

Two holes on the valve core are arranged on the wall, and the two holes are distributed at 90 degrees, and compared with a vertical distribution mode, a bending process is carried out from one hole to the other hole, namely, a bent communicating pipe is arranged inside the valve core, so that the flow velocity of body fluid has an important buffering effect, especially before the liquid enters an output pipe, the trend of the whole liquid is easier to control by proper flow velocity control, the liquid can smoothly flow along the output pipe when entering the output pipe, and if the liquid cannot splash to the second through hole or other places, the effect consistency of the falling speed of all the body fluid is good, and the liquid is not easy to mix with another liquid flowing down at the back. The liquid moves downwards completely in the output pipe, and the inner wall of the output pipe is basically lyophobic at present, so that the liquid cannot be retained on the wall, and the mixing of the two liquids is basically avoided in all aspects. The liquid mixing is effectively avoided.

The first tubular structure 111 and the second tubular structure 112 are both horizontally arranged in the front-back direction, the first input pipe 113 and the second input pipe 114 are respectively vertically arranged at the top of the first tubular structure 111 and the top of the second tubular structure 112, the first through hole 120 is arranged at the top of the first tubular structure 111, and the third through hole 121 is arranged at the top of the second tubular structure 112, so that the first input pipe 113 and the second input pipe 114 are respectively communicated with the first through hole 120 and the third through hole 121.

The output pipe 115 is vertically arranged in the center below the first cylindrical structure 111 and the second cylindrical structure 112, and the top end of the output pipe 115 is positioned between the first cylindrical structure 111 and the second cylindrical structure 112;

the second through hole 122 is arranged at the position of the first cylindrical structure 111 connected with the output pipe 115, and the fourth through hole 123 is arranged at the position of the second cylindrical structure 112 connected with the output pipe 115.

The output pipe 115 is provided with a first hole 104 and a second hole communicated with the second through hole 122 and the fourth through hole 123 at the connection position of the first cylindrical structure 111 and the second cylindrical structure 112, so that the liquid can directly enter the output pipe 115 after coming out of the first cylindrical structure 111 or the second cylindrical structure 112.

The first tubular structure 111 and the second tubular structure 112 are both a cylindrical structure with an open end and a closed end, i.e. the front end is open, and the rear end is closed, referring to fig. 2-3, at least one ring of annular groove 118 is arranged on the inner walls of the first tubular structure 111 and the second tubular structure 112;

the peripheries of the first valve core 100 and the second valve core 101 are both provided with annular convex strips 106 which are matched with the annular grooves 118, so that when the first valve core 100 is positioned in the first cylindrical structure 111, the annular convex strips 106 are just positioned in the annular grooves 118, the first valve core 100 can be fixed in the first cylindrical structure 111, can rotate in the first cylindrical structure 111, and can be connected with the first cylindrical structure in the same way, and the second valve core 101 can be fixed in the second cylindrical structure 112, and can rotate in the second cylindrical structure 112.

The first notch 119 is formed in the wall of the opening of each of the first cylindrical structure 111 and the second cylindrical structure 112, the second notch 107 is formed in the wall of the opening of each of the first valve core 100 and the second valve core 101, and in an initial state, the second notch 107 of the first valve core 100 is aligned with the first notch 119 of the first cylindrical structure 111, and the second notch 107 of the second valve core 101 is also aligned with the first notch 119 of the second cylindrical structure 112.

As a further preferred embodiment, a baffle 124 is vertically arranged at the center of the upper end of the output pipe 115, two faces of the baffle 124 respectively face the second through hole 122 and the fourth through hole 123, so as to prevent the liquid from one of the cylindrical structures from splashing to the outlet of the other cylindrical structure, if the baffle 124 is not added, the liquid from one cylindrical structure may splash to the outlet of the other cylindrical structure when the flow rate is high, the normal falling time of the liquid is increased, even the liquid may be retained at the other outlet, and the liquid is very likely to be mixed with the liquid coming out from the other cylindrical structure. Therefore, a baffle plate 124 can be arranged, the situation is prevented, the possibility of mixing two liquids can be further avoided, the using effect is better, and the baffle plate 124 is simple in arrangement, simple in process and low in cost.

In a further preferred embodiment, a flat groove 108 is formed in the center of each of the first and second valve spools 100 and 101 at one end surface thereof. The second notch 107 and the flat groove 108 are located in the same direction, that is, both are located on the front side of the valve element, the front and rear directions are shown in fig. 2, the second notch 107 is communicated with the flat groove 108, and the depth of the second notch 107 is smaller than that of the flat groove 108, so that the adapter shaft 27 can be connected with the valve element more firmly, and the overall rotating effect is more accurate.

The valve body further comprises a flat plate 116 which is horizontally arranged, namely, the flat plate is parallel to the surfaces of the first tubular structure 111 and the second tubular structure 112, one end of the flat plate 116 is fixedly connected to the peripheries of the first input pipe 113 and the second input pipe 114 and extends backwards to the outside of the first tubular structure 111 and the second tubular structure 112, the bottom surface of the flat plate 116 is fixedly connected with the top end surfaces or the upper end surfaces of the first tubular structure 111 and the second tubular structure 112, namely, the flat plate 116 is fixed with the two input pipes and the two tubular structures at the same time at the position where the input pipes are connected with the tubular structures, and the positions of the tubular structures where the flat plate 116 passes through are fixed with the top end surfaces of the tubular structures.

In addition, the lower end surface of the flat plate 116 above the output pipe 115 extends downwards to be fixedly connected with the top of the output pipe 115, and as mentioned above, the upper end of the output pipe 115 is fixedly connected with the two tubular structures, and the top of the output pipe is fixedly connected with the flat plate 116, so that the flat plate 116 is not only convenient for a user to install or disassemble the control valve 10, but also more importantly, the flat plate 116 integrates the two tubular structures and the two input pipes into a whole, and the use effect is greatly increased.

Preferably, the flat plate 116 is provided with a rib 117 parallel to the axis of the first cylindrical structure 111 or the second cylindrical structure 112, which can enhance the strength of the flat plate 116, provide an acting point for a user to hold in hand, and prevent the user from slipping.

In this embodiment, the two valve cores are preferably identical in structure, and in the initial state, as shown in fig. 1, the two valve cores can be installed in the same direction, that is, the two valve cores are placed one after the other, and two holes in one valve core are aligned with two through holes in the corresponding cylindrical structure one by one, as shown in the right side of fig. 1, then the liquid can be communicated and enter the output pipe 115 from the input pipe; the hole in the other valve core is staggered with the through hole in the corresponding cylindrical structure, as shown in the left side of fig. 1, that is, the liquid cannot enter the output pipe 115 from the input pipe, and the liquid can enter the output pipe 115 to realize the connection state only by rotating the valve core clockwise by 90 degrees.

Preferably, in fig. 1, the first notches 119 on the two cylindrical structures are located at the lowest end of the opening wall, and the second notches 107 on the two valve cores are also located at the lowest end of the opening wall, so that the first notches 119 and the second notches 107 are aligned, that is, in an original state of factory shipment, the valve cores are rotated to make the second notches 107 located at the lowest end and aligned with the first notches 119, and at this time, one valve core is turned on (right side is turned on) and one valve core is turned off (left side is turned off); if the two valve cores rotate clockwise by 90 degrees at the same time, the two valve cores are just opposite, namely the right valve core is closed, the left valve core is opened, the two valve cores rotate anticlockwise by 90 degrees at the same time, the two valve cores return to the right side to be connected and the left valve core is closed, and finally the two liquids are alternated.

Example 2

An enteral feeding solution infusion apparatus, as shown in fig. 12, comprises the control valve 10 of embodiment 1, wherein the first input tube 113 of the control valve 10 is connected with the first upper conduit 11 for delivering liquid, the second input tube 114 is connected with the second upper conduit 12 for delivering liquid, the output tube 115 is connected with the lower conduit 25 for outputting liquid from the lower conduit 25, the lower conduit 25 is connected with the connector 20 for connecting with human body, and the connector 20 is connected with human body for inputting liquid into human body. The connector 20 is preferably a luer connector, and is convenient to use and good in effect.

The first and second upper ducts 11, 12 may be connected to a nutrient liquid 13 and a cleaning liquid 14, respectively, to allow the two liquids to enter the control valve 10 through respective ducts.

The lower guide pipe 25 comprises a rubber pipe 15, a first guide pipe 17 and a second guide pipe 19, one end of the rubber pipe 15 is connected with the output pipe 115, the other end of the rubber pipe is connected with the first guide pipe 17 through a first two-way connector 16, the first guide pipe 17 is connected with the second guide pipe 19 through a Y-shaped three-way connector 18, and the second guide pipe 19 is further connected with a liquid stopping clamp 21. The speed that the nutrition pump exported liquid can be made more stable by the setting of rubber tube.

As one embodiment, as shown in fig. 13, the downcomer 25 further includes a third conduit 22, one end of the third conduit 22 is connected to the output pipe 115, and the other end of the third conduit 22 is communicated with the rubber tube 15 through a second two-way port 23. The connection of the rear part of the rubber tube 15 is the same as above and will not be described in detail here.

In the present embodiment, the nutrient solution bag 13 and the cleaning solution bag 14 may be replaced by two puncture instruments 24, as shown in fig. 13, and the puncture instruments 24 may be used for infusion of different liquid medicines with different liquid medicines, nutrient solution 13 and/or cleaning solution 14, etc.

In this embodiment, the infusion set is complete, and when in use, it is only necessary to connect the motor and the circuit board 8, for example, two motors are prepared, and output shafts of the two motors are respectively connected with the flat grooves 108 on the first valve core 100 and the second valve core 101, that is, the output shaft part connected with the flat groove 108 is also flat so that it can be just accommodated in the flat groove 108. The circuit board can be integrated with a control chip or connected with a processor/controller, so that control is realized. When the valve core rotates, the motor rotates to drive the output shaft of the motor to rotate, the output shaft rotates to drive the valve core to rotate, the valve core rotates to align or stagger the hole in the valve core and the through hole in the cylindrical structure, and liquid is communicated (the control valve is opened) or blocked (the control valve is closed).

Example 3

As shown in fig. 14-20, a nutrition pump includes a pump body 1 and an infusion set as described in example 2.

The infusion set comprises a control valve 10 as described in embodiment 1.

The pump body 1 is provided with a pump wheel 34, and the lower guide pipe bypasses the pump wheel and penetrates out of the pump body 1.

Two motors and two transfer shafts 27, wherein one end of one transfer shaft 27 is connected with the first valve core 100 to enable the transfer shaft 27 to drive the valve core to rotate, the other end of the transfer shaft 27 is connected with one motor to enable the motor to drive the transfer shaft 27 to rotate, and similarly, the other transfer shaft 27 is connected with the second valve core 101 and the other motor to enable the motor to drive the valve core to rotate.

The adapter shaft 27 comprises a body 28, the top end face of the body 28 is fixedly connected with a motor, a positioning block 29 protruding out of the bottom end face is transversely arranged in the center of the bottom end face of the body 28, one end of the positioning block 29 extends outwards to the outside of the body 28, the bottom end face and two side faces of the positioning block 29 are both horizontal planes or vertical planes, a shaft rod 30 is fixedly arranged on the lower end face of the positioning block 29, and the free end of the shaft rod 30 is a flat head 31 and is used for extending into a flat groove 108 of the valve core to drive the valve core to rotate. The flat head 31 and the flat groove 108 are arranged in a matching way so as to be conveniently driven to rotate.

The pump body 1 includes a front surface and a rear surface, the front surface is provided at an upper end thereof with a mounting groove 2 for mounting the control valve 10 and a guide groove 3 for placing a downcomer 25 and the like, and the front surface is provided at a lower end thereof with the pump impeller 34. The duct tank 3 is used for placing the downcomer 25, and the duct tank 3 is provided with a bubble detecting means 32 and a pressure detecting means 33 for detecting bubbles, pressure, and the like generated by the liquid flowing through the downcomer, and the bubble detecting means 32 may be a bubble sensor and the pressure detecting means 33 may be a pressure sensor.

Two circular bosses 5 for placing the adapting shaft 27 are arranged at the back corresponding to the mounting groove 2, the center of each boss 5 is provided with a fixing hole 4 communicated with the mounting groove 2, and the shaft rod 30 of the adapting shaft 27 can penetrate into the mounting groove 2 from the back through the fixing hole 4 and is connected with the control valve 10 in the mounting groove 2.

Each boss 5 is provided with two centrosymmetric or axisymmetric right-angle convex surfaces 6, as shown in fig. 17 and 19, the edge of the right-angle vertex of the right-angle convex surface 6 (i.e. the right-angle edge at the right angle connected with the boss 5) is flush with the inner side surface of the fixing hole 4.

The shaft rod 30 extends into the positioning hole, the positioning block 29 is placed on the upper end face of the boss 5, the shaft rod 30 can be used as a rotating shaft to rotate on the upper end face of the boss 5, the two right-angle sides of the right-angle convex surface 6 have limiting effect, the positioning block 29 can only rotate clockwise or anticlockwise within a 90-degree range, and the maximum rotating angle is 90 degrees. The range of rotation of the spool is limited and the accuracy of the rotation is increased.

Preferably, a bearing 26 is arranged in the positioning hole, the height of the bearing 26 is consistent with the depth of the positioning hole, the shaft rod 30 is connected into the bearing 26, and the flat head 31 on the shaft rod 30 extends out of the positioning hole and is connected with the flat groove 108 on the valve core in the mounting groove 2.

Two adjacent side surfaces of the two bosses 5 are connected into a whole, a sensor is respectively arranged on the outer sides of the two bosses 5, the sensor detects the position of the transfer shaft, and the position of the valve core or the opening and closing of the valve core is judged according to the position of the transfer shaft.

In a further preferred embodiment, the sensor is configured as a U-shaped groove 7 opening toward the boss 5 so that the positioning block 29 can enter and exit the U-shaped groove 7 during rotation, the U-shaped groove 7 is formed by two parallel connecting edges connecting the two parallel edges, one of the parallel edges is fixedly connected to the back surface of the pump body 1, when the adapter shaft 27 is mounted, during rotation on the boss 5, the side of the positioning block 29 extending out of the body 28 faces the sensor, and during rotation of the adapter shaft 27, the positioning block 29 extending out of the body 28 enters or exits the sensor configured as the U-shaped groove 7, and the sensor can detect the signal of the entering and exiting of the positioning block 29. The sensor is connected to the circuit board 8 to enable the transmission of signals.

Preferably, when the positioning block 29 enters the sensor, just one side edge of the positioning block 29 is in contact with one right-angle side surface of the right-angle convex surface 6, so that the positioning effect is better, and the accuracy is higher. The position of the sensor and the several right-angled convexities 6 is shown in fig. 19.

As a further preferred embodiment, the mounting groove 2 is a structure with an open top and a reduced bottom, the open top is used for placing two cylindrical structures and two input pipes of the control valve 10, and the reduced bottom is used for placing the output pipe 115; offer on open lower extreme both sides wall and hold just first tubular structure 111 and second tubular structure 112's arc fixed slot 9, then control valve 10 when in mounting groove 2, the outside of first tubular structure and the outside of second tubular structure are the joint in the fixed slot 9 of both sides, make fixing in mounting groove 2 that control valve 10 can be better like this.

In addition, in this embodiment, the valve core can be directly and manually screwed to rotate without adopting a motor and a transfer shaft to realize control. Of course, it is preferable to adopt the motor control method for saving labor, material resources, and accuracy.

Example 4

As shown in fig. 21, the operation of the nutrition pump is as follows: installing the valve core in the cylindrical structure, wherein the notch of the valve core is aligned with the notch of the cylindrical structure; the switching shaft 27 is connected with the valve core, the two direct current motors are respectively connected with the corresponding switching shafts, and the direct current motors drive the corresponding valve cores to synchronously rotate in the cylindrical structure through the corresponding switching shafts, so that the nutrient solution 13 and the cleaning solution 14 are alternately output. Specifically, when nutrient solution is needed, a valve core corresponding to the nutrient solution is opened, and the nutrient solution passes through the valve core and enters an output pipe; when the cleaning solution is needed, the valve core corresponding to the nutrient solution is closed firstly, and then the valve core of the cleaning solution is opened, so that the cleaning solution enters the output pipe through the valve core. Thus, the liquid mixing phenomenon can be absolutely avoided.

Because the positioning block of the transfer shaft can go in and out of the sensor in the rotating process, the position of the transfer shaft can be detected, namely the position of the valve core is reflected.

1) If the output result of the sensor is that the valve core of the cleaning liquid is closed and the valve core of the nutrient solution is opened, the direct current motors 35a and 35b do not rotate, and the pump wheel 34 is controlled to rotate, so that the infusion of the nutrient solution is realized;

2) if the valve core of the cleaning solution is closed and the valve core of the nutrient solution is closed, controlling a direct current motor 35a connected with the valve core of the nutrient solution to rotate for a certain time, opening the valve core of the nutrient solution, detecting a signal of a detection sensor 7a at the nutrient solution side, controlling the pump impeller to rotate to realize the infusion of the nutrient solution if the valve core of the nutrient solution is opened, and giving an alarm if the valve core of the nutrient solution is closed;

3) if the valve core of the cleaning liquid is opened and the valve core of the nutrient solution is closed, firstly controlling the direct current motor 35b connected with the cleaning liquid to rotate for a certain time, closing the valve core of the cleaning liquid, then detecting the signal of the cleaning liquid side detection sensor 7b, if the valve core of the cleaning liquid is closed, controlling the pump impeller to rotate to realize the infusion of the nutrient solution, and if the valve core of the cleaning liquid is still opened, sending an alarm;

4) if the valve core of the cleaning liquid is opened and the valve core of the nutrient solution is opened, the malposition alarm is carried out.

The utility model discloses in, nutrient solution bag 13 and cleaning solution bag 14 can be replaced by two puncture outfits 24, and the puncture outfit can with different liquid medicine, nutrient solution and/or cleaning solution etc. realize the infusion of different liquid medicines.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (15)

1. A nutrition pump comprises a pump body and an infusion apparatus which can be connected to the pump body, wherein the infusion apparatus comprises a control valve, and a pump wheel is mounted on the pump body; the method is characterized in that:

the control valve comprises a valve body and a valve core which can be matched and connected with the valve body, the valve body comprises a first input pipe, a second input pipe, a cylindrical structure and an output pipe for outputting liquid, and the cylindrical structure is composed of a first cylindrical structure and a second cylindrical structure which are arranged side by side; the valve core comprises a first valve core which can be just accommodated in a first cylindrical structure and can rotate in the first cylindrical structure and a second valve core which can be just accommodated in a second cylindrical structure and can rotate in the second cylindrical structure;

a first through hole communicated with the first input pipe and a second through hole communicated with the output pipe are formed in the side wall of the first cylindrical structure, and correspondingly, a third through hole communicated with the second input pipe and a fourth through hole communicated with the output pipe are formed in the side wall of the second cylindrical structure;

a first hole and a second hole which are communicated with each other are formed in the side wall of the first valve core, and a third hole and a fourth hole which are communicated with each other are formed in the side wall of the second valve core;

when the two through holes in the cylindrical structure and the two holes in the valve core are respectively aligned one by one, liquid enters the output pipe through the valve core, and the valve core is opened; when the two through holes on the cylindrical structure and the two holes on the valve core are staggered, the liquid in the input pipe cannot enter the output pipe, and the valve core is closed.

2. The nutrition pump of claim 1, wherein: a bent first communication pipe which is communicated with the first hole and the second hole is arranged in the first valve core so as to lead liquid to pass through; and a bent second communicating pipe for communicating the third hole and the fourth hole is also arranged in the second valve core so as to allow the liquid to pass through.

3. The nutrition pump of claim 1, wherein: the first hole and the second hole on the first valve core are two independent through holes distributed at 90 degrees, and the third hole and the fourth hole on the second valve core are also two independent through holes distributed at 90 degrees;

correspondingly, the first through hole and the second through hole on the first tubular structure are two independent through holes distributed at 90 degrees, and the third through hole and the fourth through hole on the second tubular structure are also two independent through holes distributed at 90 degrees.

4. The nutrition pump of claim 1, wherein: the first cylindrical structure and the second cylindrical structure are horizontally arranged in the front-back direction, and the first input pipe and the second input pipe are respectively vertically arranged at the top of the first cylindrical structure and the top of the second cylindrical structure and are respectively communicated with the first through hole and the third through hole;

the output pipe is vertically arranged in the center of the lower part of the first tubular structure and the second tubular structure, and the top end of the output pipe is positioned between the first tubular structure and the second tubular structure.

5. The nutrition pump of claim 4, wherein: the first cylindrical structure and the second cylindrical structure are both cylindrical structures with open ends and closed ends, and at least one annular groove is formed in the inner walls of the first cylindrical structure and the second cylindrical structure;

the peripheries of the first valve core and the second valve core are respectively provided with an annular convex strip matched with the annular groove, so that the valve cores can be fixedly connected in the cylindrical structure and can freely rotate in the cylindrical structure.

6. The nutrition pump of claim 1, wherein: the infusion apparatus further comprises a first upper guide pipe, a second upper guide pipe and a lower guide pipe, the first input pipe in the control valve is connected with the first upper guide pipe used for conveying liquid, the second input pipe is connected with the second upper guide pipe used for conveying liquid, and the output pipe is connected with the lower guide pipe so as to output the liquid from the lower guide pipe.

7. The nutrition pump of claim 6, wherein: the first notch on the first cylindrical structure and the second notch on the second cylindrical structure are aligned with the second notches on the first valve core and the second valve core respectively in the initial state.

8. The nutrition pump of claim 1, wherein: the pump body is also provided with a motor and a switching shaft; one end of the switching shaft is connected with the motor, and the other end of the switching shaft is connected with the valve core so that the motor drives the valve core to rotate through the switching shaft;

the switching shaft comprises a body, the top end face of the body is detachably and fixedly connected with the motor, a positioning block protruding out of the bottom end face is transversely arranged in the center of the bottom end face of the body, one end of the positioning block extends outwards to the outside of the body, and a shaft rod is fixedly arranged on the lower end face of the positioning block.

9. The nutrition pump of claim 1, wherein: the valve body further comprises a flat plate which is horizontally arranged, one end of the flat plate is fixedly connected to the peripheries of the first input pipe and the second input pipe and extends backwards to the outside of the first cylindrical structure and the second cylindrical structure, and the bottom surface of the flat plate is fixedly connected with the top end surfaces of the first cylindrical structure and the second cylindrical structure;

the lower end face of the flat plate above the output pipe extends downwards to be fixedly connected with the top of the output pipe, and the upper end of the output pipe is located between the first tubular structure and the second tubular structure and is fixedly connected with the two tubular structures so that the control valve is integrated into a whole.

10. The nutrition pump of claim 7, wherein: the pump body comprises a front face and a back face, wherein the upper end of the front face is provided with a mounting groove for mounting the control valve, the back face is provided with two circular bosses for placing the switching shaft corresponding to the mounting groove, the center of each boss is provided with a fixing hole communicated with the inside of the mounting groove, and the shaft rod of the switching shaft penetrates through the fixing hole from the back face of the body and is connected with the valve core in the mounting groove.

11. The nutrition pump of claim 10, wherein: each boss is provided with two centrosymmetric or axisymmetric right-angle convex surfaces, and edges at the right angles of the right-angle convex surfaces are flush with the inner side surfaces of the fixing holes;

the axostylus axostyle sets up in the locating hole, and the locating piece is placed in the up end of boss to can use the axostylus axostyle to rotate at the up end of boss as the axis of rotation, and two right-angle faces of right-angle convex surface can control the locating piece can only clockwise or anticlockwise rotation at 90 degrees within ranges.

12. The nutrition pump of claim 10, wherein: and a sensor for detecting the position of the transfer shaft is arranged on the outer side of each of the two bosses so as to judge the opening and closing of the valve core.

13. The nutrition pump of claim 11, wherein: arc-shaped fixing grooves which just accommodate the first cylindrical structure and the second cylindrical structure are formed in the walls of the two sides of the lower end of the mounting groove, so that when the control valve is arranged in the mounting groove, the outer side of the first cylindrical structure and the outer side of the second cylindrical structure are just clamped in the fixing grooves on the two sides;

the centers of one end faces of the first valve core and the second valve core are respectively provided with a flat groove; the second notch and the flat groove are both positioned on the front side of the valve core, the second notch is communicated with the flat groove, and the depth of the second notch is smaller than that of the flat groove;

the free end of the shaft lever is a flat head and is used for extending into a flat groove of the valve core to drive the valve core to rotate;

the upper end of the front surface of the body is also provided with a conduit groove for placing a lower conduit and the like, and the pump wheel is arranged at the lower end of the front surface of the body.

14. An infusion set is characterized in that: which is an infusion set in a nutrition pump according to any one of claims 1-13.

15. A control valve, characterized by: which is a control valve in a nutritional pump according to any of claims 1-13.

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