CN113350613A

CN113350613A - Chemical liquid control device and chemical liquid supply system

Info

Publication number: CN113350613A
Application number: CN202110627047.0A
Authority: CN
Inventors: 许永松; 郭琦; 唐航; 秦川; 穆磊; 吴健
Original assignee: BEIJING TAIJIE WEIYE TECHNOLOGY CO LTD
Current assignee: Beijing Taijieweiye Technology Co.,Ltd.
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-09-07
Anticipated expiration: 2041-06-04
Also published as: CN113350613B

Abstract

The invention discloses a liquid medicine control device and a liquid medicine supply system, the liquid medicine control device comprises: the valve body is internally provided with a liquid flowing channel, two ends of the liquid flowing channel respectively form a liquid inlet end and a liquid outlet end, and liquid medicine flows in from the liquid inlet end and flows out from the liquid outlet end; an overflow port formed on one side of the liquid passing channel in the radial direction and communicated with the liquid passing channel; the elastic sheet is used for plugging the overflow port, and when the pressure of the liquid medicine in the liquid flowing channel reaches a certain pressure value, the elastic sheet is opened through elastic deformation; and a displacement sensor for detecting a displacement amount of the elastic piece at the overflow port when the elastic piece is elastically deformed to obtain elastic deformation of the elastic piece, and obtaining a pressure condition of the liquid medicine in the liquid passing channel based on the elastic deformation of the elastic piece.

Description

Chemical liquid control device and chemical liquid supply system

Technical Field

The present invention relates to the field of medical equipment, and in particular, to a liquid medicine control device and a liquid medicine supply system.

Background

A medical fluid supply apparatus for continuously supplying a medical fluid to a human tissue generally includes an administration pump and a catheter connected to the administration pump. The drug delivery pump is used for enabling the drug solution to enter tissues of a human body through the catheter.

During the liquid medicine supply process, a phenomenon that the flow of the liquid medicine is blocked may occur, for example, the distal end of the catheter extending into the tissue is displaced so that the liquid medicine in the catheter cannot enter the tissue of the human body, and the phenomenon may cause adverse effects if not discovered or stopped in time.

In order to find and stop the above phenomenon in time, in the prior art, a control device is arranged on the conduit, specifically, a section of the conduit penetrating through the control device is arranged to be a hose with a smaller elastic modulus, a local section of the hose is arranged in the rectangular groove, and part of the hose protrudes out of the notch of the rectangular groove; the control device has a flat plate disposed above the hose bulging portion and a pressure sensor for checking pressure. If the flow of liquid medicine is obstructed, because the pump of dosing still works, lead to the pressure of the fluid in the hose to rise, under the spacing of two cell walls of rectangular channel, the hose is towards the direction deformation of flat board, and then pushes against the flat board to make the flat board support against pressure sensor, this makes pressure sensor detect certain pressure, and then discovers that the liquid medicine is obstructed, then controls the pump of dosing to stop dosing based on the pressure that pressure sensor obtained.

However, the above control device has the following disadvantages:

1. it is difficult to manufacture a hose having a predetermined elastic modulus, and if the elastic modulus of the hose is small or large, erroneous judgment of the control device is likely to be caused.

2. The hose is usually made of a polymer which is easily oxidized, and the elastic property and the elastic modulus of the hose can be changed after long-term use, for example, the hose cannot be reset after being deformed, so that the control device fails.

Disclosure of Invention

In view of the above technical problems in the prior art, embodiments of the present invention provide a chemical liquid control device and a chemical liquid supply system.

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:

a medical fluid control device comprising:

the valve body is internally provided with a liquid flowing channel, two ends of the liquid flowing channel respectively form a liquid inlet end and a liquid outlet end, and liquid medicine flows in from the liquid inlet end and flows out from the liquid outlet end;

an overflow port formed on one side of the liquid passing channel in the radial direction and communicated with the liquid passing channel;

the elastic sheet is used for plugging the overflow port, and when the pressure of the liquid medicine in the liquid flowing channel reaches a certain pressure value, the elastic sheet is opened through elastic deformation;

and a displacement sensor for detecting a displacement amount of the elastic piece at the overflow port when the elastic piece is elastically deformed to obtain elastic deformation of the elastic piece, and obtaining a pressure condition of the liquid medicine in the liquid passing channel based on the elastic deformation of the elastic piece.

Preferably, a guide cavity is formed in the valve body; the guide cavity divides the liquid passing channel into a first flow channel and a second flow channel; a slide valve is arranged in the guide cavity, the slide valve enables the first flow passage and the second flow passage to be communicated through sliding to an upper position, and the slide valve blocks a port of the first flow passage through sliding to a lower position; wherein:

a transition cavity is formed at the periphery of the elastic sheet, and a pressure applying flow passage is formed between the transition cavity and the guide cavity;

a pre-pressing flow channel is formed between the second flow channel and the guide cavity;

and magnets for generating magnetic repulsion force are arranged at the top of the guide cavity and the top of the slide valve.

Preferably, the overflow port extends to the transition chamber; the bottom of the transition cavity is provided with a mounting surface, the tail part of the elastic sheet is fixed on the mounting surface, and the head part of the elastic sheet is a planar plate part to cover the overflow port; a bent portion is formed between the plate portion and the tail portion.

Preferably, the port of the overflow port is provided with a sealing ring.

Preferably, the valve body comprises a valve seat and a valve cover buckled on the valve seat; the valve cover and the valve seat enclose the transition cavity.

Preferably, the displacement sensor is mounted on the valve cover and extends into the transition cavity and faces the elastic sheet.

Preferably, a sealing gasket is arranged between the valve cover and the valve seat.

Preferably, the elastic sheet is made of an alloy material.

The present invention also discloses a liquid medicine supply system, comprising:

an administration pump having an outlet;

the above-mentioned liquid medicine control device;

a first conduit connected between the drug solution control device and an outlet of the drug delivery pump;

and the proximal end of the second catheter is connected to the liquid medicine control device, and the distal end of the second catheter is used for extending into human tissues.

Preferably, the medical fluid supply system further comprises a display device for communicating with the displacement sensor to display the flow condition of the medical fluid in the conduit based on the electrical signal sent by the displacement sensor.

Compared with the prior art, the liquid medicine control device and the liquid medicine supply system disclosed by the invention have the beneficial effects that:

1. in the manufacturing process of the elastic sheet, the elastic modulus of the elastic sheet is easy to control, so that the elastic sheet closer to a set value can be obtained, and important points are that: in the long-term use process, the elastic performance and the elastic modulus of the elastic sheet are constant, so that misjudgment and failure can be avoided to a greater extent.

2. The elastic sheet is directly contacted with the liquid medicine and directly pressed by the liquid medicine to deform, so that the pressure feedback through the hose is avoided.

3. When the liquid medicine is blocked, the system not only displays and alarms through the display device, but also can block the liquid medicine through the matching of the components such as the slide valve, the guide cavity, the pressing flow channel and the like, thereby avoiding the shutdown of the administration pump.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic structural view of a chemical liquid supply system according to an embodiment of the present invention.

Fig. 2 is a view showing a state of use of the liquid medicine control apparatus according to the embodiment of the present invention (liquid medicine is normally supplied to human tissue).

Fig. 3 is a view showing a use state of the chemical liquid control device according to the embodiment of the present invention (the chemical liquid is blocked).

Reference numerals:

10-a valve body; 11-a valve seat; 111-liquid inlet end; 112-liquid outlet end; 12-valve cover; 13-a gasket; 21-a first flow channel; 22-a second flow channel; 30-a guide cavity; 40-a slide valve; 51-a pressure applying flow channel; 52-a pre-pressing flow channel; 53-a transition chamber; 54-rubber stopper; 60-an overflow port; 61-sealing ring; 70-an elastic sheet; 80-a displacement sensor; 90-a magnet; 100-liquid medicine control device; 200-a dosing pump; 201-a thrust piston; 202-a spring; 203-an outlet; 301-a first conduit; 302-a second conduit; 400-display device.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.

As shown in fig. 1 to 3, the embodiment of the present invention discloses a medical fluid control device 100 and a medical fluid supply system including the same, the medical fluid supply system further including an administration pump 200, a first conduit 301, a second conduit 302, and a display device 400.

The administration pump 200 is provided with a push piston 201 in it, a spring 202 is provided on one side of the push piston 201, a drug solution is contained on the other side of the push piston 201, and an outlet 203 is formed in the region on the same side as the drug solution. The spring 202 has a smaller spring constant and is compressed to a greater extent.

As shown in fig. 2 and 3, the chemical liquid control apparatus 100 includes: the valve comprises a valve body 10, an overflow port 60, an elastic sheet 70, a liquid passing flow passage, a transition cavity 53, a guide cavity 30, a slide valve 40, a magnet 90, a pressure applying flow passage 51 and a pre-pressing flow passage 52.

The liquid passing channel is formed in the valve body 10, a liquid inlet end 111 is formed at one end of the liquid passing channel, a liquid outlet end 112 is formed at the other end of the liquid passing channel, and two ends of the first conduit 301 are respectively connected to the outlet 203 of the administration pump 200 and the liquid inlet end 111 of the valve body 10; the proximal end of the second conduit 302 is connected to the outlet end 112 of the valve body 10, and the distal end of the second conduit 302 is used for extending into the human tissue.

The valve body 10 includes a valve seat 11 and a valve cover 12, and the valve cover 12 is fastened on the valve seat 11 and sealed by a sealing gasket 13. The guide cavity 30 is arranged in the valve seat 11, and the top of the guide cavity 30 is sealed by the valve cover 12; the guide cavity 30 divides the liquid flow passage into two sections, namely a first flow passage 21 and a second flow passage 22, wherein the liquid inlet end 111 is formed at the port of the first flow passage 21, and the second flow passage 22 is formed at the port of the second flow passage 22; the first flow channel 21 and the second flow channel 22 are both linear flow channels and are arranged in a staggered manner.

The overflow port 60 is formed on one side of the second flow passage 22 in the radial direction and is communicated with the second flow passage 22, and the transition cavity 53 is formed above the overflow port 60, and the port of the overflow port 60 extends into the transition cavity 53; the transition chamber 53 is defined by the valve seat 11 and the valve cover 12.

The elastic sheet 70 is made of a metal material, for example, the elastic sheet 70 is made of a titanium alloy having a good affinity with living organisms and biological liquids. The head of the elastic piece 70 is a flat plate part, the tail is also a flat plate part, and a bending part is formed between the head and the tail; the bottom of the transition cavity 53 at one side of the overflow port 60 is provided with a mounting surface, the tail part of the elastic sheet 70 is attached and fixed at the mounting surface, and the head part of the elastic sheet 70 is covered on the port of the overflow port 60; furthermore, a sealing ring 61 is provided at the port of the overflow 60, which allows the elastic sheet 70 to seal the overflow 60 in a more rigid manner. As shown in fig. 2, when the liquid medicine passes through the second flow passage 22 under normal conditions, since the pressure of the liquid medicine is less than the pre-tightening force of the elastic sheet 70 on the overflow port 60, the elastic sheet 70 maintains the sealing state on the overflow port 60, as shown in fig. 2, after the liquid medicine is blocked and the pressure of the liquid medicine in the second flow passage 22 is increased, the pressure of the liquid medicine can make the elastic sheet 70 deform toward the transition cavity 53, so that the elastic sheet 70 is opened, and the head of the elastic sheet 70 is bound to displace. The medical fluid in the second flow passage 22 at least partially enters the transition chamber 53 through the overflow port 60.

The displacement sensor 80 is arranged on the valve cover 12, a probe of the displacement sensor 80 extends into the transition cavity 53 and faces the head of the elastic sheet 70, when the elastic sheet 70 is elastically deformed to open the overflow port 60, the displacement sensor 80 detects the displacement of the head of the elastic sheet 70 to know that the elastic sheet 70 is deformed, and the displacement sensor 80 sends an electric signal; the display device 400 is electrically connected to the displacement sensor 80, and the display device 400 acquires the electrical signal and displays it on the display screen of the display device 400, and makes the alarm device alarm by installing the alarm device on the display device 400.

The pre-pressing flow passage 52 is arranged in the valve seat 11, and two ends of the pre-pressing flow passage 52 are respectively communicated with the first flow passage 21 and the bottom of the guide cavity 30; the pressurizing flow passage 51 is opened in the valve cap 12, and both ends of the pressurizing flow passage 51 are respectively communicated with the transition chamber 53 and the top of the guide chamber 30.

The valve cover 12 is further provided with a mounting hole which penetrates the pressurizing flow path 51, and a rubber stopper 54 is mounted in the mounting hole.

The spool valve 40 is installed in the pilot chamber 30 and can slide up and down in the pilot chamber 30; when the spool valve 40 slides to the upper position, the first flow passage 21 and the second flow passage 22 are communicated through the guide cavity 30, and when the spool valve 40 slides to the lower position, the inner port of the second flow passage 22 is blocked by the spool valve 40, so that the liquid medicine can enter the second flow passage 22 differently.

Magnets 90 are provided at an upper portion of the guide chamber 30 and an upper end of the spool valve 40, and the two magnets 90 act on the spool valve 40 to form a magnetic repulsive force.

The operation of the chemical liquid supply system is described as follows:

before the administration pump 200 is operated, the downward magnetic repulsion of the magnet 90 of the drug solution control device 100 to the spool 40 causes the spool 40 to be in the lower position, at which time the spool 40 blocks the first flow passage 21 from the second flow passage 22, and at which time the drug solution control device 100 prevents the drug solution from flowing out of the second conduit 302.

As shown in fig. 2, after the distal end of the second conduit 302 extends into the human body tissue and the administration pump 200 is operated, the drug solution flows out from the outlet 203 of the administration pump 200, passes through the first conduit 301 and enters the first flow channel 21 of the drug solution control device 100, the drug solution entering the first flow channel 21 enters the cavity bottom of the guide cavity 30 through the pre-pressure flow channel 52 and exerts an upward force on the lower end of the slide valve 40, so that the slide valve 40 slides upward to be in its upper position against the magnetic force of the magnet 90, and thereafter, the first flow channel 21 and the second flow channel 22 are communicated, and the drug solution flows into the second flow channel 22 from the first flow channel 21 and flows into the human body tissue through the second conduit 302 to provide the drug solution to the human body tissue. At this time, the pressure of the chemical solution flowing through the second flow path 22 is not sufficient to deform the elastic piece 70 and open the overflow port 60.

As shown in fig. 3, when the medical fluid in the second conduit 302 is obstructed, for example, the second conduit 302 extends into the human tissue and displaces to make the medical fluid unable to be injected into the human tissue, the pressure of the medical fluid in the second conduit 302 and the second flow channel 22 rises, at this time, the medical fluid in the second flow channel 22 overcomes the pre-tightening force of the elastic sheet 70 on the overflow port 60 to make the elastic sheet 70 elastically deform, at this time, the displacement sensor 80 obtains the information that the elastic sheet 70 elastically deforms, and transmits the information to the display device 400 to display the phenomenon that the medical fluid is obstructed, and the display device 400 simultaneously gives an alarm. Meanwhile, the liquid medicine enters the transition chamber 53 through the overflow port 60, and enters the guide chamber 30 above the slide valve 40 through the pressure applying flow passage 51, the liquid medicine generates downward pressure on the slide valve 40 and combines with the magnetic force of the magnet 90 to make the slide valve 40 slide downward and slide to the lower position, so that the first flow passage 21 is separated from the second flow passage 22 to prevent the administration pump 200 from continuing to administer the medicine, thereby facilitating the judgment of the user or the professional on the reason that the liquid medicine in the second conduit 302 is blocked and the conduit is unblocked.

After the medical fluid in the second conduit 302 is smoothly circulated after being treated by the user, the rubber stopper 54 of the installation hole is opened to release the pressure of the guide chamber 30 above the slide valve 40, so that the slide valve 40 slides up again to enable the whole system to operate normally again.

The chemical liquid control device 100 and the chemical liquid supply system provided by the invention have the following advantages:

1. the elastic sheet 70 has an elastic modulus that can be easily controlled during the manufacturing process, and thus the elastic sheet 70 can be obtained closer to a set value, and it is important that: in the long-term use process, the elastic performance and the elastic modulus of the elastic sheet 70 are relatively constant, so that misjudgment and failure can be avoided to a greater extent.

2. The elastic piece 70 is directly contacted with the medical solution and is directly pressed by the medical solution to deform, thereby avoiding pressure feedback through the hose.

3. When the liquid medicine is blocked, the system not only displays and alarms through the display device 400, but also the liquid medicine control device 100 can block the liquid medicine through the matching of the slide valve 40, the guide cavity 30, the pressurizing flow passage 51 and other parts, so that the dosing pump 200 is prevented from being stopped.

Moreover, although exemplary embodiments have been described herein, the scope of the present invention includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or alterations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above-described embodiments, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A liquid medicine control device, comprising:

2. The medical fluid control device according to claim 1, wherein a guide chamber is formed in the valve body; the guide cavity divides the liquid passing channel into a first flow channel and a second flow channel; a slide valve is arranged in the guide cavity, the slide valve enables the first flow passage and the second flow passage to be communicated through sliding to an upper position, and the slide valve blocks a port of the first flow passage through sliding to a lower position; wherein:

3. The medical fluid control device according to claim 2, wherein the overflow port extends to the transition chamber; the bottom of the transition cavity is provided with a mounting surface, the tail part of the elastic sheet is fixed on the mounting surface, and the head part of the elastic sheet is a planar plate part to cover the overflow port; a bent portion is formed between the plate portion and the tail portion.

4. The liquid medicine control device according to claim 3, wherein a seal ring is provided at a port of the overflow port.

5. The liquid medicine control device according to claim 2, wherein the valve body comprises a valve seat and a valve cover fastened on the valve seat; the valve cover and the valve seat enclose the transition cavity.

6. The fluid control device according to claim 5, wherein the displacement sensor is mounted on the valve cap and extends into the transition chamber and toward the elastic sheet.

7. The medical fluid control device according to claim 5, wherein a gasket is provided between the valve cover and the valve seat.

8. The medical fluid control device according to claim 1, wherein the elastic sheet is made of an alloy material.

9. A chemical liquid supply system, comprising:

an administration pump having an outlet;

the liquid medicine control device according to any one of claims 2 to 8;

10. The medical fluid supply system according to claim 9, further comprising a display device for communicating with the displacement sensor to display a flow condition of the medical fluid in the conduit based on an electrical signal generated by the displacement sensor.