JP4121485B2 - Chemical interruption valve and chemical injection device - Google Patents

Description

  The present invention relates to a chemical solution injection device. More specifically, after a tube is attached, the chemical solution can be supplied by installing the door so that the chemical solution can be charged only under the condition that the setting is completed by closing the door. The present invention relates to a chemical solution injection device that can safely inject a chemical solution into a patient by including a chemical solution interrupting valve and a detection sensor that detects the clogged state of the tube and notifies the patient.

  As is well known, conventionally, if a doctor prescribes the amount of medicine to be injected into a patient, the nurse will fix the drug container at a position higher than the patient's injection position according to the doctor's prescription, and it will become a twist screw by experience. A valve with a built-in opening / closing part is adjusted so that a certain amount of injection solution is injected into the patient.

  However, when a drug solution such as an analgesic is injected into a patient, convulsions and analgesia often occur intermittently. In such a case, the injection amount must be temporarily increased. At this time, the injection amount must be injected based on the amount prescribed by a specialist doctor. Therefore, if the patient himself / herself adjusts the injection amount, it is quite dangerous. However, depending on the hospital environment, it is very difficult for doctors and nurses to quickly adjust the injection volume of chemicals in response to intermittent pain, and doctors and nurses are time consuming. is there.

  In particular, in the case of an immature nurse at the time of administration of an injection solution, there is a problem that it is difficult to adjust the injection amount per hour so that the drug solution is accurately and quantitatively injected as prescribed. In the case of patients who are not usually injected, but who receive injections only at the onset of a special disease, for example, patients with acute heart attack symptoms, etc. There are many difficulties because an individual must always carry a drug solution and must accurately inject a fixed amount at the time of injection.

  Even if you are a skilled person, there is a risk of failure and excessive injection of chemicals, and the chemicals contain foreign substances and air, or the tube is energized by other objects and the chemicals If the supply is interrupted, there is a problem that poses a risk to the patient.

  Therefore, recently, an automatic chemical solution feeder that automatically supplies a fixed amount of chemical solution has been developed. However, such a conventional automatic chemical solution feeder is a method in which a chemical solution is simply forcedly injected by a pump, and there is a risk of causing an accident because no other sensor is mounted. In addition, when the door is opened, there is a problem that a large amount of chemical solution is supplied to the patient at a time, which is dangerous to life.

  An object of the present invention made in view of such conventional problems is that the chemical solution can be introduced by installing the door so that the chemical solution can be introduced only under the condition that the setting is completed by closing the door after the tube is installed. An object of the present invention is to provide a chemical liquid injection device that can prevent supply of a large amount of chemical liquid by opening a door by providing a chemical liquid intermittent valve that enables supply.

  Another object of the present invention is to detect a clogged tube and detect a clogged state when the drug solution contains foreign substances or air, or when the tube is energized by another object to shut off the supply of the drug solution. It is in providing the chemical | medical solution injection | pouring apparatus which can inject | pour a chemical | medical solution safely to a patient by providing the detection sensor which can alert | report.

In order to achieve the above object, the chemical interrupting valve according to the present invention is provided with an input port and an output port for letting out the chemical solution that has flown into the outside, a valve housing having a space formed therein, and a pressed member A chemical interrupting valve comprising a spool and a spool that is disposed in the valve housing so as to be movable up and down. The spool has elasticity, the center is a small diameter portion, and both ends are large. The diameter of the valve housing increases linearly from the center to both ends, and the space of the valve housing corresponds to the outer peripheral edge of the pressed portion and the opening / closing portion of the spool. The inner peripheral edge of the shape is tapered and gradually increases from the center toward both ends.When the pressed portion of the spool is biased downward, the spool moves downward, and the pressed portion is Within the space The outer peripheral edge of the opening / closing part is in close contact with an edge, and a flow gap is generated between the outer peripheral edge and the inner peripheral edge of the space part, so that the chemical liquid can flow from the input port to the output port through the space part, When the bias to the pressed portion of the spool is released, the spool moves upward due to its own elasticity, and when the pressed portion of the spool is not pressed, the pressed portion and the opening / closing portion of the spool The outer peripheral edge is disposed at a position corresponding to the inner peripheral edge of the space of the valve housing, and the flow gap is closed.

According to the above-described configuration, by providing the chemical solution interrupting valve that interrupts the supply of the chemical solution depending on the open / closed state of the door, the chemical solution is charged only under the condition that the setting is completed by closing the door after the tube is mounted. Therefore, a large amount of chemical liquid can be prevented from being supplied at a time when the door is opened.
In addition, by providing a detection sensor that can detect the clogged state of the tube and notify the patient, the chemical solution contains foreign substances or air, or the tube is energized by another object to shut off the supply of the chemical solution In some cases, an accident can be prevented by promptly informing the patient of this.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1a and 1b are longitudinal sectional views showing the configuration and operating state of a chemical interrupting valve according to a preferred embodiment of the present invention.

  Referring to these drawings, in the chemical injection device according to a preferred embodiment of the present invention, after the tube is mounted, the door disposed on the upper surface of the valve 51 is closed and the setting is completed only under the conditions. A chemical solution intermittent valve 51 for detecting the mounting state of the door and a detection sensor 44 for detecting the clogged state of the tube are provided so that the chemical solution can be injected, so that the patient can safely inject the chemical solution himself.

  For this purpose, the chemical interrupting valve 51 according to a preferred embodiment of the present invention has a receiving space inside, and tubes (not shown) are connected to both sides to input and output the chemical liquid that flows in to the outside. A valve housing 52 formed with 60, 62 is provided.

  The valve housing 52 includes a space 58 in which the spool 54 can be received. The space 58 has a shape which is tapered toward the upper end and the lower end from the center so as to have a symmetrical shape with respect to the spool 54.

  That is, the spool 54 basically has a cylindrical shape as a bobbin for winding a thread, but its center is a small diameter portion and both ends are large diameter portions. Therefore, the spool 54 has a tapered shape in which the diameter increases linearly from the center toward the upper end and the lower end. At this time, the upper part of the spool 54 operates as the pressed part 55a, and the outer edge of the lower part operates as an opening / closing part 55b for intermittently connecting the chemical flowing through the valve.

  More specifically, the spool 54 has a circular cross section cut horizontally, but has a pincushion shape in which the diameter of the outer periphery 54c increases toward the upper end and the lower end with the center as the center. Further, the upper surface 54a has a center protruding upward, and the lower surface 54b has a flat shape so as to be horizontal with the bottom surface of the mounting groove 34 on which the chemical liquid interrupting valve is mounted.

  At this time, since the diameter of the lower end of the spool 54 is larger than the diameter of the upper end, as will be described later, when the spool 54 is urged downward by closing the door 22, the inner peripheral edge of the valve housing 52 is And a flow gap is generated between the outer periphery of the spool 54 and the chemical liquid can flow.

  Further, since the spool 54 itself has elasticity, when the spool 54 is positioned and pushed into a hole formed in the upper portion of the valve housing 52 at the time of initial coupling to the valve housing 52, the lower end and the outer peripheral edge are set to the inner center. It is pushed into the space 58 inside the valve housing 52 while being compressed.

  After the spool 54 is mounted on the valve housing 52, the flow of the chemical liquid through the output port 60, the input port 62, and the internal space 58 is intermittent depending on whether a biasing force is present on the upper surface of the spool 54. It becomes possible. That is, when the spool 54 is attached to the valve housing 52, the spool 54 flows up and down within a certain distance within the valve housing 52. At the time of flow, the pressed portion 55a of the spool 54 is in close contact with the inner peripheral edge of the valve housing 52 and does not generate a gap through which chemicals can pass. However, the opening / closing portion 55b formed at the lower portion of the spool 54 has an inner peripheral edge of the valve housing 52. Since the flow gap 53 is formed, the chemical liquid can flow into the space 58 through the flow gap 53.

  Accordingly, the chemical liquid flowing in through the output port 60 is intermittently moved toward the input port 62 through the space 58 depending on whether the spool 54 is biased downward or returned to its original position. Is done.

That is, if the biasing projection 26 provided on the lower surface of the door 22 closes while the door 22 is closed, the spool 54 is biased downward, and the flow gap 53 is generated while the spool 54 is biased downward. As shown in FIG. 1b, the chemical liquid that has flowed in through the outlet is discharged from the output port 60 via the space 58. On the other hand, when the spool 54 is not biased downward, the outer peripheral edge of the spool is Since it is disposed at a position corresponding to the inner peripheral edge of the space portion of the valve housing and the flow gap 53 is closed and the chemical liquid flowing in through the input port 62 is prevented from flowing into the space portion 58, The discharge of chemicals is blocked.

  FIG. 2 is a longitudinal sectional view showing the arrangement of the membrane and the detection sensor 44 provided at the lower part of the chemical interruption valve according to a preferred embodiment of the present invention.

  Referring to this, in a preferred embodiment of the present invention, a membrane 56 is disposed below the space 58 of the chemical interrupt valve 51. The membrane 56 is attached to the lower edge of the valve housing 52 to form the lower surface of the space 58.

  The membrane 56 is a fine film and has elasticity in itself, but does not perform another expansion and contraction operation when the chemical solution flows. Therefore, when the middle of a valve (not shown) connected to the input port 62 is bent or pressed by another object and normal discharge of the chemical through the valve cannot be performed, the chemical accumulates in the space 58 by the chemical. It expands downward by the applied pressure.

  In addition, as shown in FIG. 2, detection sensors 44 that generate an electrical signal from liquid, metal, or the like are disposed at a predetermined interval below the membrane 56. If a part of the tube is pressed by an object and the chemical liquid does not flow normally, the membrane 56 is expanded toward the detection sensor 44, so that the detection sensor 44 can detect the clogged state of the tube.

  The detection sensor 44 is installed in the main body 4 and detects the proximity state of the membrane 56 and outputs the detection signal to a microchip (not shown). Based on the signal from the detection sensor 44, the microchip activates an alarm buzzer 31, which will be described later, to generate an alarm sound. Therefore, the patient can notify through the alarm sound from the alarm buzzer 31 whether the door 22 is correctly closed or whether the tube connected to the output port 60 is pressed and the chemical liquid is not normally supplied.

  At this time, the microchip can drive the alarm buzzer 31 and at the same time display information related to the abnormal supply of the chemical solution through the LCD 11 described later.

FIG. 3 is a perspective view showing an outer shape of a chemical liquid injector to which the chemical interrupt valve according to the present invention is applied.
Referring to this, the chemical solution injection device 2 according to a preferred embodiment of the present invention is provided with a tube inside the device, so that the chemical solution can be charged only under the condition that the door is closed and the setting is completed. Since the door detection sensor for detecting the mounting state of the door and the detection sensor for detecting the clogged state of the tube are provided, the patient can safely inject the medical solution himself.

  For this reason, the chemical interruption valve 51 exemplified in the present invention can be used by being applied to the chemical injection device 2 configured as shown in FIG. The chemical injection device 2 is provided with a housing 4 that forms the outer shape of the device, and the housing 4 is divided into three compartments. Among the three compartments, the uppermost compartment is a chemical storage chamber 6 in which a chemical pack is stored, and the lower part controls the injection amount and injection cycle of the chemical solution, and the setting state is displayed on the screen. A control room 8 having an LCD 11 attached thereto is provided.

  Further, a driving chamber 12 is provided in the lower part of the control chamber 8 for pumping and discharging the chemical liquid through the tube 16 and intermittently charging the chemical liquid.

  On the other hand, a bolus switch 14 is connected to a predetermined position on the side surface of the housing 4 via an electric wire. The user can temporarily increase the amount of chemical solution input by operating the bolus switch 14. In addition, an air filter 18 is disposed at an intermediate portion between the injection needle 20 and the tube 16. The air filter 18 filters the air contained in the chemical liquid flowing through the tube 16 and discharges it to the outside. A button unit 10 for changing various settings through key operations is provided outside the control room 8.

  Therefore, since the patient can always carry a predetermined amount of liquid medicine regardless of time and place while always carrying the liquid medicine injection device 2 in which the multi-sensor is installed, it is very convenient. In order to ensure safety, various sensors can be combined organically to control the chemical injection, so there is no need for a separate nurse in daily life.

  FIG. 4 is a partial perspective view showing in detail the configuration of the chemical liquid injector to which the chemical interrupt valve according to the present invention is applied.

  Referring to this, the chemical injection device 2 is provided with a drive chamber 12 in the lower part of the housing 4 for receiving a chemical injection control signal and generating a driving force so that the chemical can be supplied. A door 22 is provided on the upper surface of the drive chamber 12 by a hinge so as to be freely opened and closed. A lower surface of the door 22 includes a support base 24 that protrudes at a predetermined length to urge the tube 16 and a tube 16. A biasing protrusion 26 is provided for biasing the check valve so as to keep it open.

  A pressure pump 28 is provided inside the drive chamber 12. The pressure pump 28 includes a motor (not shown) that generates a rotational driving force at a constant rotational speed by electrical control, and a plurality of biasing pieces 30 that are connected in the horizontal direction so as to be movable up and down by the rotational driving force of the motor. .

  Further, the biasing piece 30 moves up and down in the form of a sine group by the rotational force of a cam (not shown). Therefore, the urging piece 30 urges the lower surface of the main tube (not shown) in the form of a sign, and the chemical solution in the tube 16 flows in one direction through this.

  On the other hand, a guide groove 32 is formed on the upper surface of the housing 4 to which the door 22 of the drive chamber 12 is connected to guide the tube 16 with the tube 16 mounted therein. The mounting groove 34 is formed.

Accordingly, when the chemical liquid interrupting valve 51 is inserted into the drive chamber 12 and the door 22 is closed with the chemical liquid pack (not shown) received in the chemical liquid storage chamber 6, the lower surface of the door 12 is the spool of the chemical liquid interrupting valve 51. By energizing 54, a flow path for the chemical solution is formed. On the other hand, when the door 22 is opened, the spool 54 moves upward by its own elasticity and returns so that the outer peripheral edge of the spool is disposed at a position corresponding to the inner peripheral edge of the space portion of the valve housing . The fluid flow path is closed. Further, if the middle of the tube is pressed by an object or the chemical liquid does not flow normally, the membrane 56 expands toward the detection sensor 44, so that the detection sensor 44 can detect the clogged state of the tube. Therefore, the patient can safely put the chemical solution alone.

That is, since the detection sensor 44 comes to detect the pressing state of the tube, when the pressing state of the tube is detected, the alarm buzzer 31 is driven and an alarm sound is generated. Therefore, it is possible to notify the patient that the door 22 cannot be closed correctly or that the tube connected to the output port 60 is pressed and normal supply of chemical liquid is not performed.
FIG. 5 is a perspective view showing another example of use of the chemical liquid injector according to the present invention.

  Referring to this, the chemical injection device 2 to which the chemical interruption valve 51 of the present invention is applied can have a chemical storage chamber 6 in which another chemical pack is stored, as shown in FIG. As shown in FIG. 5, the connection tube 72 can be directly coupled to a specific chemical pack 70 for use.

  In such a case, it is preferable that the slot 102 for inserting the connecting tube 72 is formed in the longitudinal direction on the outer surface of the housing 4 of the chemical liquid injector 2. Therefore, any kind of liquid medicine pack 70 can be connected to the liquid medicine injection device 2 using the connection tube 72, and a predetermined amount of liquid medicine set in the liquid medicine injection device 2 can be put into the patient.

  While the invention has been described in terms of several preferred embodiments within the present specification, many variations and modifications will occur to those skilled in the art without departing from the scope and spirit of the invention as disclosed in the appended claims. It should be understood that can be made.

  As described above, according to the present invention, by providing a chemical liquid intermittent valve that interrupts the supply of chemical liquid depending on the open / closed state of the door, the chemical liquid is installed only under the condition that the setting is completed by closing the door after mounting the tube. Therefore, a large amount of chemical liquid can be prevented from being supplied at a time when the door is opened.

  In addition, by providing a detection sensor that can detect the clogged state of the tube and notify the patient, the chemical solution contains foreign substances or air, or the tube is energized by another object to shut off the supply of the chemical solution In some cases, an accident can be prevented by promptly informing the patient of this.

FIG. 1A and FIG. 1B are longitudinal sectional views showing a configuration and an operating state of a chemical liquid interrupting valve according to a preferred embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view showing a state in which a membrane and a detection sensor are mounted on a chemical interrupt valve according to a preferred embodiment of the present invention. FIG. 3 is a perspective view showing the outer shape of the chemical liquid injector according to the present invention. FIG. 4 is a partial perspective view showing in detail the configuration of the chemical liquid injector according to the present invention. FIG. 5 is a perspective view showing another example of use of the chemical liquid injector according to the present invention.

Explanation of symbols

4 Housing 16 Drain tube 22 Door 44 Detection sensor 51 Chemical interrupt valve 52 Valve housing 54 Spool 56 Membrane 58 Space 60 Output port 62 Output port

Claims (4)

An input port and an output port for discharging the chemical solution flowing into the outside to the outside are provided, and a valve housing in which a space portion is formed,
A chemical interrupting valve comprising a pressed portion and an opening / closing portion and a spool disposed in the valve housing so as to be movable up and down;
The spool has elasticity, the center is a small diameter part, both ends are large diameter parts, and the shape is such that the diameter increases linearly from the center to both ends,
The space portion of the valve housing has an inner peripheral edge having a shape corresponding to the outer peripheral edge of the pressed portion and the opening / closing portion of the spool, and has a taper that gradually increases from the center toward both ends .
When the pressed portion of the spool is biased downward, the spool moves downward, the pressed portion is in close contact with the inner peripheral edge of the space portion, and the outer peripheral edge of the opening / closing portion is the inner peripheral edge of the space portion. A flow gap is generated between the input port and the output port through the space, and the chemical solution can flow.
When the bias to the pressed portion of the spool is released, the spool moves upward due to its own elasticity,
When the pressed portion of the spool is not pressed, the outer peripheral edge of the pressed portion of the spool and the opening / closing portion is disposed at a position corresponding to the inner peripheral edge of the space portion of the valve housing, and the flow gap is closed. A chemical interruption valve characterized by
A chemical storage chamber for storing a chemical pack inside,
A pressure chamber and a door for driving discharge of the chemical liquid through the tube by pumping the chemical liquid, and a drive chamber for intermittently charging the chemical liquid;
A housing for supporting the outside of the drug solution storage chamber and the drive chamber;
A chemical solution injection apparatus using the chemical solution interrupting valve according to claim 1, comprising a tube extending from the inside of the drive chamber to the outside and transferring the chemical solution from the chemical solution pack to an injection needle.
The chemical solution interrupting valve is received inside the drive chamber, a tube connected to the chemical solution pack is connected to the input port, a tube connected to an injection needle is connected to the output port,
The pressed portion of the spool is biased downward by the door when the door of the driving chamber is closed. A membrane disposed at a predetermined distance from the spool at a lower portion of the space of the valve housing and expanding downward due to clogging of the tube by its own elasticity;
The chemical injection device according to claim 2 , further comprising a detection sensor disposed at a lower portion of the membrane and detecting a clogged state of the tube according to the expansion of the membrane. The chemical injection device according to claim 2, further comprising a bolus switch connected to the housing via an electric wire to generate an additional chemical injection instruction signal.

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