Infusion pump with bubble detection function

Abstract

The invention relates to the technical field of infusion pump equipment, and discloses an infusion pump with bubble detection, which comprises a machine body, the machine body is rotatably connected with a turning cover, the machine body is internally provided with an accommodating cavity, and the accommodating cavity is internally provided with a bubble detector I and a bubble detector II; a control device is arranged between the bubble detector I and the bubble detector II and is used for controlling the bubble detection precision and eliminating bubbles in the injection tube. According to the infusion pump with the bubble detection function, the up-down circulating action of the first bubble detector is controlled through the arranged circulating device, so that the bubble detector is in a circulating up-down movement state, real-time detection is carried out, compared with fixed detection of a traditional mode, circulating detection can be more sensitive, due to the circulating action, single-time detection is avoided, and the detection efficiency is improved. However, the bubbles may be detected up and down in a reciprocating mode in the flowing process, and even if the bubbles are not detected for the first time, the sensitivity and accuracy after detection can be improved through multiple times of circulating detection.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion pump equipment, and in particular to an infusion pump with bubble detection capability. Background Art

[0002] With the rapid development of medical technology, infusion pumps have occupied an indispensable and important position. While performing high-precision control of infusion, medical infusion pumps are also equipped with detection modules, including infusion pressure detection and bubble detection in the infusion tube, to ensure the safety of infusion. Among them, tube loading is one of the important factors affecting the accuracy consistency of infusion pumps.

[0003] In the prior art, while controlling the flow of liquid through an infusion pump, a bubble detector is basically used to detect bubbles in the tube. Generally, the bubble detector is used to firmly clamp the infusion tube. It is possible that after tiny bubbles pass through the detector, no signal feedback is generated, which will lead to reduced detection sensitivity. In addition, when the infusion pump in the prior art is in use, the patient may pull the infusion pump through the infusion tube without paying attention, causing the equipment to fall and be damaged. Therefore, an infusion pump with bubble detection is proposed to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an infusion pump with bubble detection, which solves the problem in the prior art that the bubble detection has poor sensitivity and the patient's movements will pull the infusion tube and the infusion pump, causing the equipment to fall and be damaged.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an infusion pump with bubble detection, comprising a body, a flip cover rotatably connected to the body, a accommodating cavity provided in the body, a bubble detector 1 and a bubble detector 2 provided inside the accommodating cavity, a control device provided between the bubble detector 1 and the bubble detector 2, the control device being used to control the accuracy of bubble detection and eliminate bubbles in the injection tube; the control device comprises a driving device, a circulation device, a winding device and a defoaming device.

[0008] Preferably, the driving device includes a small motor, the output end of the small motor is connected to a driving shaft, the driving shaft is connected to a crank rod, one end of the driving shaft is connected to a transmission shaft, the transmission shaft is fixedly connected to a cam, the cam is connected to the defoaming device, and the crank rod is connected to the circulation device.

[0009] Preferably, the circulation device includes a pull rod, one end of which is rotatably connected to a crank rod, the other end of which is rotatably connected to a bubble detector 1, and the back side of the bubble detector 1 is slidably connected to the machine body via a key slot.

[0010] Preferably, the defoaming device includes shaft rod one and shaft rod two, shaft rod one and shaft rod two are respectively connected with a convex plate and a slide plate, the convex plate and the slide plate are both slidably connected to the cam, one end of shaft rod one and shaft rod two are respectively connected with a left plate and a right plate, and one end of the left plate and the right plate are both connected with a collision rod.

[0011] Preferably, one side of the left plate and the right plate are both connected to a compression spring, one end of the compression spring is connected to the machine body, and the shaft rod 1 and the shaft rod 2 are both rotatably connected in the accommodating cavity of the machine body.

[0012] Preferably, the winding device includes a central axis, a coil spring sleeve is connected to the central axis, a positioning plate is connected to the body, the infusion tube is wound on the coil spring sleeve and passes through the positioning plate, and a limiting plate is also connected to the coil spring sleeve.

[0013] Preferably, the coil spring sleeve includes a ring sleeve one and a ring sleeve two, the side of the ring sleeve one is connected to the side of the ring sleeve two, the ring sleeve one and the ring sleeve two are provided with solution cavities inside, and the two ends of the ring sleeve one and the ring sleeve two are connected.

[0014] Preferably, the central axis is fixed in the body, and the interior of the central axis is divided into an inflow cavity and an outflow cavity, the inflow cavity is connected with the internal solution cavity of the first ring, and the outflow cavity is connected with the solution cavity of the second ring.

[0015] Preferably, the inflow chamber and the outflow chamber are connected with pipeline 1 and pipeline 2 respectively, one end of the pipeline 1 is connected to a heating box, a heating pipe is arranged inside the heating box, and one end of the heating box is connected to a pumping device.

[0016] Preferably, the pumping device includes a pump shaft, which is fixed on the output shaft of a small motor, and a plurality of pump blades are rotatably connected to the pump shaft, and a pump box is slidably connected to the surface of the pump blades, and the pump box is fixed inside the machine body, and the pump shaft is located at an eccentric position of the pump box.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an infusion pump with bubble detection, which has the following features:

[0019] Beneficial effects:

[0020] 1. The infusion pump with bubble detection controls the up and down circulation action of the bubble detector through a circulating device, so that the bubble detector is in a state of circulating up and down movement for real-time detection. Compared with the traditional fixed detection, the circulating detection can be more sensitive because the circulating action is not a single detection, but the bubble may be detected up and down during the flow process. Even if it is not detected for the first time, the sensitivity and accuracy after detection can be increased through multiple cyclic detections.

[0021] 2. The infusion pump with bubble detection can simulate manual ejection through the provided defoaming device, so that the bubbles float up and gradually disappear, without the need for manual ejection to eliminate them, thereby improving the safety and convenience of infusion injection. The subsequent heating of the infusion tube can indirectly heat the internal infusion liquid, which will also assist in defoaming.

[0022] 3. The infusion pump with bubble detection has a coil spring sleeve, so that when the patient makes sudden hand movements, the coil spring sleeve will be squeezed through the infusion tube to contract, so the pulling force is transferred to the coil spring sleeve, thereby avoiding direct pulling on the equipment. When the coil spring contracts, the patient will definitely react and will know that the hand is actually in the infusion state, thereby further improving the patient's infusion safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an infusion pump with bubble detection provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of an infusion pump circulation device with bubble detection provided by the present invention;

[0025] Figure 3 This is a schematic structural diagram of a defoaming device of an infusion pump with bubble detection provided by the present invention;

[0026] Figure 4 This is a schematic diagram of a coil spring sleeve connection structure of an infusion pump with bubble detection provided by the present invention;

[0027] Figure 5 This is a structural schematic diagram of a coil spring sleeve and a central shaft of an infusion pump with bubble detection provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the connection structure of pipeline 1 and pipeline 2 of an infusion pump with bubble detection provided by the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a pump suction device of an infusion pump with bubble detection provided by the present invention.

[0030] In the figure: 1, machine body; 2, bubble detector 1; 3, control device; 301, pull rod; 302, small motor; 303, drive shaft; 304, crank rod; 305, transmission shaft; 306, cam; 307, left side plate; 308, right side plate; 309, compression spring; 310, striker; 311, shaft rod 1; 312, shaft rod 2; 313, convex plate; 314, slide plate; 315, coil spring Sleeve; 3151, ring sleeve one; 3152, ring sleeve two; 316, limit plate; 317, center axis; 3171, inflow cavity; 3172, outflow cavity; 318, pipeline one; 319, heating box; 320, heating tube; 321, pump suction device; 3211, pump blade; 3212, pump box; 3213, pump shaft; 322, pipeline two; 4, bubble detector two; 5, positioning piece; 6, flip cover. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 7 An infusion pump with bubble detection includes a body 1, a flip cover 6 is rotatably connected to the body 1, a receiving cavity is arranged inside the body 1, a bubble detector 1 2 and a bubble detector 2 4 are arranged inside the receiving cavity, a control device 3 is arranged between the bubble detector 1 2 and the bubble detector 2 4, and the control device 3 is used to control the accuracy of bubble detection and eliminate bubbles in the injection tube; the control device 3 includes a driving device, a circulation device, a winding device and a defoaming device.

[0033] In this embodiment, the driving device includes a small motor 302, the output end of the small motor 302 is connected to a driving shaft 303, the driving shaft 303 is connected to a crank rod 304, one end of the driving shaft 303 is connected to a transmission shaft 305, the transmission shaft 305 is fixedly connected to a cam 306, the cam 306 is connected to the defoaming device, and the crank rod 304 is connected to the circulation device. The driving device is provided to provide rotational power to the circulation device, the defoaming device and the subsequent pumping cycle.

[0034] Furthermore, the circulation device includes a pull rod 301, one end of which is rotatably connected to a crank rod 304, the other end of which is rotatably connected to a bubble detector 2, and the back of the bubble detector 2 is slidably connected to the body 1 through a keyway. The rotation of the small motor 302 will drive the rotation of the crank rod 304, and the rotational movement of the crank rod 304 will drive the pull rod 301 to move up and down, thereby driving the bubble detector 2 to perform a reciprocating up and down circulation detection in the body 1. The reciprocating motion detection is adopted, and the number of detections is first increased, because when the syringe is infusing, the bubbles will flow with the liquid, and when the bubble detector 2 reciprocates, it is equivalent to performing multiple detections on the infusion tube at that position, thereby improving the sensitivity and accuracy in the detection process, and using the increase in frequency to further improve the accuracy of bubble detection.

[0035] Furthermore, the defoaming device includes a shaft rod 1 311 and a shaft rod 2 312, and the shaft rod 1 311 and the shaft rod 2 312 are respectively connected with a convex plate 313 and a slide plate 314, and the convex plate 313 and the slide plate 314 are both slidably connected to the cam 306, and one end of the shaft rod 1 311 and the shaft rod 2 312 is respectively connected with a left plate 307 and a right plate 308, and one end of the left plate 307 and the right plate 308 is connected with a striker 310. One side of the left plate 307 and the right plate 308 is connected with a compression spring 309, and one end of the compression spring 309 is connected to the body 1, and the shaft rod 1 311 and the shaft rod 2 312 are both rotatably connected in the accommodating cavity of the body 1. When the driving shaft 303 rotates, it will also drive the transmission shaft 305 to rotate, and the transmission shaft 305 will drive the cam 306 to rotate. Every time the cam 306 rotates one circle, it will form abutment with the convex plate 313 and the slide plate 314, thereby driving the left plate 307 and the right plate 308 to rotate counterclockwise and clockwise by a certain angle respectively, thereby realizing the compression of the compression spring 309 by the left plate 307 and the right plate 308. When the cam 306 disengages from the convex plate 313 and the slide plate 314, the compression spring 309 will instantly release its elastic force, controlling the impact rod 310 of the left plate 307 and the right plate 308 to hit the infusion tube, thereby forming a ejection effect on the human hand, and finally popping the bubbles upward until they are eliminated, thereby improving the safety and convenience during infusion.

[0036] In addition, the winding device includes a central axis 317, a coil spring sleeve 315 is connected to the central axis 317, a positioning piece 5 is connected to the body 1, the infusion tube is wound on the coil spring sleeve 315 and passes through the position of the positioning piece 5, and the coil spring sleeve 315 is also connected to a limit plate 316. During the infusion process, many patients actually have sudden hand movements and forget that they are in the infusion state. Traditional equipment may be pulled by the infusion tube and cause the equipment to fall, which may cause damage, so a coil spring sleeve 315 is provided, and the coil spring sleeve 315 is similar to the structure of a coil spring. When the infusion tube is wound around the coil spring sleeve 315 for several turns, if the patient's hand has sudden movements, the infusion tube will transfer the pulling force to the coil spring sleeve 315 to shrink, thereby extending the retractable length of the infusion tube and realizing pulling protection.

[0037] In addition, the coil spring sleeve 315 includes a ring sleeve 1 3151 and a ring sleeve 2 3152. The side of the ring sleeve 1 3151 is connected to the side of the ring sleeve 2 3152. The ring sleeve 1 3151 and the ring sleeve 2 3152 are provided with solution cavities inside, and the two ends of the ring sleeve 1 3151 and the ring sleeve 2 3152 are connected. The central shaft 317 is fixed in the body 1. The interior of the central shaft 317 is divided into an inflow cavity 3171 and an outflow cavity 3172. The inflow cavity 3171 is connected to the internal solution cavity of the ring sleeve 1 3151, and the outflow cavity 3172 is connected to the solution cavity of the ring sleeve 2 3152. The inflow cavity 3171 and the outflow cavity 3172 are connected to the pipeline 1 318 and the pipeline 2 322 respectively. One end of the pipeline 1 318 is connected to the heating box 319. The heating box 319 is provided with a heating pipe 320. One end of the heating box 319 is connected to the pumping device 321. The water inside the heating box 319 is heated by electric heating using the heating tube 320, and the pumping device 321 performs suction reflux on the liquid, and the heated water is transported through the pipe 2 322 into the interior of the inflow chamber 3171, and then enters the interior of the ring sleeve 1 3151, and then enters the interior of the ring sleeve 2 3152 from the connection point on the end face, and then flows out from the end face of the outflow chamber 3172, and re-enters the heating box 319 for heating through the reflux of the pipe 1 318. Therefore, the coil spring sleeve 315 is in a heated state at this time, and the infusion tube wound on the coil spring sleeve 315 will be indirectly heated, so the liquid flowing into the patient's hands will be relatively warm, and the patient will not have cold hands for a long time during infusion.

[0038] It is worth noting that the pumping device 321 includes a pump shaft 3213, which is fixed on the output shaft of the small motor 302. A plurality of pump blades 3211 are rotatably connected to the pump shaft 3213. The surface of the pump blades 3211 is slidably connected to the pump box 3212. The pump box 3212 is fixed inside the body 1, and the pump shaft 3213 is located at an eccentric position of the pump box 3212. The rotation of the small motor 302 will also drive the rotation of the pump shaft 3213, and then drive the three pump blades 3211 to rotate. Because the pump blades 3211 are in an eccentric state, the pump blades 3211 will slowly squeeze and rotate at the connection of their end faces while rotating. When gradually approaching the position of the second pipe 322, the pump blades 3211 will squeeze the liquid into the inside of the second pipe 322 to achieve reflux suction of the liquid.

[0039] Working principle: first, when the infusion pump is running as a whole, the rotation of the small motor 302 will drive the rotation of the crank rod 304, and the rotation of the crank rod 304 will drive the pull rod 301 to move up and down, thereby driving the bubble detector 2 to perform up and down reciprocating cycle detection in the body 1. The traditional technology is to fix the detector on the body 1, and the fluid passes through the detector, which is equivalent to only passing once. The bubbles are small, and the detector detection process is not sensitive, so the tiny bubbles are directly missed, resulting in no signal alarm of the device. Reciprocating motion detection is adopted, and the number of detections is first increased, because when the syringe is infusing, the bubbles will flow with the liquid, and when the bubble detector 2 reciprocates, it is equivalent to multiple detections of the infusion tube at that position, thereby improving the sensitivity and accuracy of the detection process, and using the increase in frequency to improve the accuracy of bubble detection. At the same time, when the drive shaft 303 rotates, it will also drive the transmission shaft 305 to rotate, and the transmission shaft 305 will drive the rotation of the cam 306, and each rotation of the cam 306 will form abutment with the convex plate 313 and the slide plate 314, thereby driving the left plate 307 and the right plate 308 to rotate counterclockwise and clockwise by a certain angle respectively, thereby realizing the compression of the compression spring 309 by the left plate 307 and the right plate 308. When the cam 306 is separated from the convex plate 313 and the slide plate 314, the compression spring 309 will instantly release the elastic force, and the impact rod 310 of the left plate 307 and the right plate 308 will hit the infusion tube, thereby forming a catapult effect of the human hand, and finally ejecting the bubbles upward until they are eliminated. In this cycle, the probability of reducing bubbles in the pipeline during infusion is guaranteed. In fact, during the infusion process, many patients will have sudden hand movements and forget that they are in the infusion state. Traditional equipment will be pulled by the infusion tube, causing the equipment to topple over and possibly be damaged. Therefore, a coil spring sleeve 315 is provided, and the coil spring sleeve 315 has a structure similar to a coil spring. When the infusion tube is wound around the coil spring sleeve 315 for several turns, if the patient's hand has sudden movements, the infusion tube will transmit the pulling force to the coil spring sleeve 315 to contract, thereby extending the retractable length of the infusion tube and realizing pulling protection. After the hand is retracted, the coil spring sleeve 315 will be restored by elastic force, thereby ensuring that the infusion tube is in a straightened state for infusion.At the same time, the equipment is also provided with a heating circulation device, which uses the heating tube 320 in the heating box 319 for electric heating to heat the water flow inside the heating box 319. At this time, the rotation of the small motor 302 will also drive the rotation of the pump shaft 3213, and then drive the three pump blades 3211 to rotate. Because the pump blades 3211 are in an eccentric state, each time the pump blades 3211 rotate, it will drive a part of the internal water flow to scoop into the interior of the second pipe 322, and then the heated water flow is transported through the second pipe 322 into the interior of the inflow chamber 3171, and then enters the interior of the ring sleeve 1 3151, and then from The connecting part of the end face enters the interior of the ring sleeve 3152, then flows out from the end face of the outflow cavity 3172, and re-enters the heating box 319 through the reflux of the pipe 1 318 for heating. Therefore, the coil spring sleeve 315 is in a heated state at this time, and the infusion tube wound on the coil spring sleeve 315 will be indirectly heated, so the liquid flowing into the patient's hands will be relatively warm, and the patient will not have cold hands for a long time during infusion, thereby improving the patient's comfort during infusion. If heating is not needed, the heating switch of the heating tube 320 can be directly turned off, so medical staff can also perform convenient operation.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An infusion pump with bubble detection, characterized in that: The invention comprises a body (1), a flip cover (6) is rotatably connected to the body (1), a receiving cavity is arranged inside the body (1), a bubble detector 1 (2) and a bubble detector 2 (4) are arranged inside the receiving cavity, a control device (3) is arranged between the bubble detector 1 (2) and the bubble detector 2 (4), and the control device (3) is used to control the accuracy of bubble detection and eliminate bubbles in the injection tube; The control device (3) comprises a driving device, a circulation device, a winding device and a defoaming device.

2. An infusion pump with bubble detection according to claim 1, characterized in that: The driving device comprises a small motor (302), the output end of the small motor (302) is connected to a driving shaft (303), the driving shaft (303) is connected to a crank rod (304), one end of the driving shaft (303) is connected to a transmission shaft (305), the transmission shaft (305) is fixedly connected to a cam (306), the cam (306) is connected to a defoaming device, and the crank rod (304) is connected to a circulation device.

3. An infusion pump with bubble detection according to claim 2, characterized in that: The circulation device comprises a pull rod (301), one end of which is rotatably connected to a crank rod (304), the other end of which is rotatably connected to a bubble detector (2), and the back side of the bubble detector (2) is slidably connected to the machine body (1) via a keyway.

4. The infusion pump with bubble detection according to claim 3, characterized in that: The defoaming device comprises a shaft rod 1 (311) and a shaft rod 2 (312), wherein the shaft rod 1 (311) and the shaft rod 2 (312) are respectively connected with a convex plate (313) and a slide plate (314), wherein the convex plate (313) and the slide plate (314) are both slidably connected with the cam (306), and one end of the shaft rod 1 (311) and the shaft rod 2 (312) are respectively connected with a left side plate (307) and a right side plate (308), and one end of the left side plate (307) and the right side plate (308) are both connected with a collision rod (310).

5. The infusion pump with bubble detection according to claim 4, characterized in that: A compression spring (309) is connected to one side of the left plate (307) and the right plate (308), one end of each of the compression springs (309) is connected to the machine body (1), and the shaft rod 1 (311) and the shaft rod 2 (312) are rotatably connected to the accommodating cavity of the machine body (1).

6. The infusion pump with bubble detection according to claim 5, characterized in that: The reeling device comprises a central axis (317), a coil spring sleeve (315) is connected to the central axis (317), a positioning plate (5) is connected to the body (1), the infusion tube is coiled on the coil spring sleeve (315) and passes through the positioning plate (5), and a limiting plate (316) is also connected to the coil spring sleeve (315).

7. An infusion pump with bubble detection according to claim 6, characterized in that: The coil spring sleeve (315) includes a ring sleeve one (3151) and a ring sleeve two (3152), the side of the ring sleeve one (3151) is connected to the side of the ring sleeve two (3152), the ring sleeve one (3151) and the ring sleeve two (3152) are provided with solution cavities inside, and the two ends of the ring sleeve one (3151) and the ring sleeve two (3152) are connected.

8. The infusion pump with bubble detection according to claim 7, characterized in that: The central shaft (317) is fixed in the body (1), and the interior of the central shaft (317) is divided into an inflow chamber (3171) and an outflow chamber (3172), wherein the inflow chamber (3171) is connected to the internal solution chamber of the first ring (3151), and the outflow chamber (3172) is connected to the solution chamber of the second ring (3152).

9. An infusion pump with bubble detection according to claim 8, characterized in that: The inflow chamber (3171) and the outflow chamber (3172) are respectively connected to a pipe 1 (318) and a pipe 2 (322); one end of the pipe 1 (318) is connected to a heating box (319); a heating pipe (320) is arranged inside the heating box (319); and one end of the heating box (319) is connected to a pumping device (321).

10. An infusion pump with bubble detection according to claim 9, characterized in that: The pumping device (321) comprises a pump shaft (3213), wherein the pump shaft (3213) is fixed on the output shaft of the small motor (302), a plurality of pump blades (3211) are rotatably connected to the pump shaft (3213), the surfaces of the pump blades (3211) are slidably connected to a pump box (3212), the pump box (3212) is fixed inside the machine body (1), and the pump shaft (3213) is located at an eccentric position of the pump box (3212).

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