An infusion pump with bubble detection

Abstract

The present invention relates to the technical field of infusion pump equipment, and discloses an infusion pump with bubble detection, comprising a body, a flip cover rotatably connected to the body, a receiving cavity provided in the body, a bubble detector 1 and a bubble detector 2 provided inside the receiving 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 infusion pump with bubble detection controls the up and down circulation action of the bubble detector 1 by a provided circulation device, so that the bubble detector is in a state of cyclic up and down movement for real-time detection. Compared with the traditional fixed detection, the cyclic detection can be more sensitive because the cyclic action is not a single detection, but the bubbles may be detected in an up and down reciprocating manner during the flow. Even if the bubbles are not detected the first time, the sensitivity and accuracy after the detection can be increased through multiple cyclic detections.

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 become indispensable and important. While providing high-precision control over infusion, medical infusion pumps also feature detection modules, including those for infusion pressure and bubble detection within the tubing, to ensure safe infusion. Tubing installation is a key factor affecting the accuracy and 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. After tiny bubbles pass through the detector, no signal feedback is generated, which leads 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 problems solved

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

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, 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 comprising 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, a cam is fixedly connected to the transmission shaft, 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 of the bubble detector 1 is slidably connected to the machine body through a keyway.

[0010] Preferably, the defoaming device includes shaft rod one and shaft rod two, and shaft rod one and shaft rod two are respectively connected with a convex plate and a slide plate, and the convex plate and the slide plate are both slidably connected to the cam, and 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 body, and the shaft rod 1 and the shaft rod 2 are both rotatably connected in the accommodating cavity of the body.

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

[0013] Preferably, the coil spring sleeve includes a ring sleeve 1 and a ring sleeve 2, the side of the ring sleeve 1 is connected to the side of the ring sleeve 2, the ring sleeve 1 and the ring sleeve 2 are provided with a solution cavity inside, and the two ends of the ring sleeve 1 and the ring sleeve 2 are connected.

[0014] Preferably, the central shaft is fixed in the body, and the interior of the central shaft is divided into an inflow cavity and an outflow cavity, the inflow cavity is communicated with the internal solution cavity of the ring sleeve 1, and the outflow cavity is communicated with the solution cavity of the ring sleeve 2.

[0015] Preferably, the inflow chamber and the outflow chamber are connected with pipe 1 and pipe 2 respectively, one end of the pipe 1 is connected to a heating box, a heating tube is provided 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 the small motor, and a plurality of pump blades are rotatably connected to the pump shaft, and the surface of the pump blades is slidably connected to a pump box, which is fixed inside the machine body, and the pump shaft is located at an eccentric position of the pump box.

[0017] (3) 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 the provided circulation device, so that the bubble detector is in a state of cyclic up and down motion for real-time detection. Compared with the traditional fixed detection, the cyclic detection can be more sensitive because the cyclic action is not a single detection, but the bubbles may be detected in an up and down reciprocating manner during the flow process. Even if the bubble is not detected the first time, the sensitivity and accuracy of the 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, causing the bubbles to float up and gradually disappear without manual ejection, 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, which allows the patient to squeeze the coil spring sleeve through the infusion tube and contract when making sudden hand movements, thereby transferring the pulling force 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 proposed by the present invention;

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

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

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

[0029] Figure 7 This is a schematic structural diagram of a pumping device of an infusion pump with bubble detection proposed by the present invention.

[0030] In the figure: 1. 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. Strike rod; 311. Shaft rod 1; 312. Shaft rod 2; 313. Protruding plate; 314. Slide plate; 315. Coil spring Sleeve; 3151, ring sleeve one; 3152, ring sleeve two; 316, limit plate; 317, center axis; 3171, inflow chamber; 3172, outflow chamber; 318, pipeline one; 319, heating box; 320, heating tube; 321, pumping 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts 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 provided in the body 1, a bubble detector 1 2 and a bubble detector 2 4 are provided inside the receiving cavity, a control device 3 is provided 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 drive device includes a small motor 302. The output end of small motor 302 is connected to a drive shaft 303, which is connected to a crank rod 304. One end of drive shaft 303 is connected to a transmission shaft 305. A cam 306 is fixedly connected to transmission shaft 305. Cam 306 is connected to the defoaming device, and crank rod 304 is connected to the circulation device. The drive device provides 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 via a keyway. The rotation of the small motor 302 will drive the rotation of the crank rod 304, and the rotational motion of the crank rod 304 will drive the pull rod 301 to perform an up and down reciprocating motion, thereby driving the bubble detector 2 to perform an up and down reciprocating circulation detection in the body 1. The use of reciprocating motion detection first increases the number of detections. Because when the syringe is infusing liquid, bubbles will flow with the liquid, and the reciprocating motion of the bubble detector 2 is equivalent to multiple detections of the infusion tube at that position, thereby improving the sensitivity and accuracy of the detection process. The increase in frequency is used to improve the accuracy of bubble detection.

[0035] Furthermore, the defoaming device includes a first shaft 311 and a second shaft 312, each connected to a convex plate 313 and a slide plate 314, each of which is slidably connected to the cam 306. One end of the first shaft 311 and the second shaft 312 is connected to the left plate 307 and the right plate 308, respectively, and one end of the left plate 307 and the right plate 308 is connected to the striker 310. One side of the left plate 307 and the right plate 308 is connected to a compression spring 309, one end of which is connected to the body 1. The first shaft 311 and the second shaft 312 are both rotatably connected to the accommodating chamber of the body 1. 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. 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 catapult 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 reeling device includes a central axis 317, to which a coil spring sleeve 315 is connected. 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. The coil spring sleeve 315 is also connected to a limit plate 316. During the infusion process, many patients actually make sudden hand movements and forget that they are in the infusion state. Traditional equipment may be pulled by the infusion tube, causing the equipment to fall over and possibly cause damage. Therefore, the coil spring sleeve 315 is provided. 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 several times, if the patient's hand makes a sudden movement, the infusion tube will transfer the pulling force to the coil spring sleeve 315, causing it to contract, thereby extending the retractable length of the infusion tube and achieving pull protection.

[0037] In addition, the coil spring sleeve 315 includes a first ring 3151 and a second ring 3152. The side of the first ring 3151 is connected to the side of the second ring 3152. The first and second rings 3151 and 3152 are provided with solution chambers, and the ends of the first and second rings 3151 and 3152 are connected. The central shaft 317 is fixed within the body 1. The interior of the central shaft 317 is divided into an inflow chamber 3171 and an outflow chamber 3172. The inflow chamber 3171 is connected to the solution chamber inside the first ring 3151, and the outflow chamber 3172 is connected to the solution chamber of the second ring 3152. The inflow chamber 3171 and the outflow chamber 3172 are connected to the first pipe 318 and the second pipe 322, respectively. One end of the first pipe 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 heating tube 320 in the heating box 319 is electrically heated to heat the water flow inside the heating box 319. The pumping device 321 will suction and reflux the liquid, and the heated water flow will be transported through the pipe 2 322 into the interior of the inflow chamber 3171, and then into the interior of the ring sleeve 1 3151, and then into the interior of the ring sleeve 2 3152 from the connection point on the end face, and then out from the end face of the outflow chamber 3172, and re-enter 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.

[0038] It is worth noting that the pumping device 321 includes a pump shaft 3213, which is fixed to 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 also drives the rotation of the pump shaft 3213, which in turn drives the rotation of the three pump blades 3211. 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 interior of the second pipe 322, realizing reflux suction of the liquid.

[0039] The working principle is as follows: first, when the infusion pump is in operation, 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. The fluid passes through the detector, which is equivalent to only one passage. The bubbles passing through the detector are small, and the detection process of the detector is not sensitive, so tiny bubbles are directly missed, resulting in no signal alarm of the device. However, a reciprocating motion detection is adopted. First, the number of detections is increased. Because the syringe is infusing, the bubbles will flow with the liquid. 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. By increasing the frequency, the accuracy of bubble detection is improved. At the same time, when the drive shaft 303 rotates, it also drives the transmission shaft 305 to rotate, and the transmission shaft 305 in turn drives the rotation of the cam 306. Each 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 striker 310 of the left plate 307 and the right plate 308 to hit the infusion tube, thereby forming a catapult effect of the human hand, and finally ejecting the bubbles upward until they are eliminated. This cycle ensures that the probability of bubbles in the pipeline during infusion is reduced. During the infusion process, many patients may make sudden hand movements and forget that they are in the infusion state. Traditional equipment may be pulled by the infusion tube, causing the equipment to fall over and possibly be damaged. Therefore, a coil spring sleeve 315 is provided. 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 makes 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 achieving pulling protection. After the hand is retracted, the coil spring sleeve 315 will recover through elastic force, thereby ensuring that the infusion tube is straightened and infusion is carried out.At the same time, the device 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 rotation of the pump blades 3211 will drive a part of the internal water flow to enter the interior of the pipe 2 322, and then the heated water flow is transported through the pipe 2 322 into the interior of the inflow chamber 3171, and then into 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 2 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 to be heated. 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 the infusion, thereby improving the patient's comfort during the infusion. If heating is not required, 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 document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

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 provided in the body (1), a bubble detector (2) and a bubble detector (4) are provided inside the receiving cavity, a control device (3) is provided between the bubble detector (2) and the bubble detector (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 reeling device and a defoaming device; 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 circulation device includes a pull rod (301), one end of the pull rod (301) is rotatably connected to a crank rod (304), the other end of the crank rod (304) 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 defoaming device includes a shaft rod (311) and a shaft rod (312), and the shaft rod (311) and the shaft rod (312) are respectively connected to 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 (311) and the shaft rod (312) are respectively connected to 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 to a collision rod (310).

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

3. The infusion pump with bubble detection according to claim 2, characterized in that: The reeling device comprises a central shaft (317), a coil spring sleeve (315) is connected to the central shaft (317), a positioning piece (5) is connected to the body (1), the infusion tube is coiled on the coil spring sleeve (315) and passes through the position of the positioning piece (5), and a limiting plate (316) is also connected to the coil spring sleeve (315).

4. The infusion pump with bubble detection according to claim 3, characterized in that: 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), and a solution cavity is provided inside the ring sleeve 1 (3151) and the ring sleeve 2 (3152), and the two ends of the ring sleeve 1 (3151) and the ring sleeve 2 (3152) are connected.

5. The infusion pump with bubble detection according to claim 4, 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). The inflow chamber (3171) is connected to the internal solution chamber of the ring sleeve (3151), and the outflow chamber (3172) is connected to the solution chamber of the ring sleeve (3152).

6. The infusion pump with bubble detection according to claim 5, 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 provided inside the heating box (319); and one end of the heating box (319) is connected to a pumping device (321).

7. The infusion pump with bubble detection according to claim 6, characterized in that: The pumping device (321) includes a pump shaft (3213), which is fixed to 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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