A high-pressure syringe flow and pressure detection device

Abstract

The utility model relates to a kind of high-pressure syringe flow and pressure detection device, comprising: container, for containing liquid in high-pressure syringe;Pipeline assembly, including liquid inlet pipeline, liquid outlet pipeline, detection pipeline and first valve body and second valve body, liquid inlet pipeline has with the import of high-pressure syringe connection, first liquid inlet and second liquid inlet, liquid outlet pipeline has outlet and first liquid outlet and second liquid outlet, first valve body can make import selectively with first liquid inlet or second liquid inlet communication, second valve body is suitable for controlling the conduction of second liquid inlet and second liquid outlet;Flow detection module includes celestial balance and timing unit, celestial balance can detect the weight change of liquid in container in real time, timing unit can be synchronized timing;Pressure detection module is used to detect the pressure in high-pressure syringe, to realize the flow detection and pressure detection of high-pressure syringe on the same device, without setting two detection devices, function sharing is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-pressure injector flow and pressure detection device. BACKGROUND

[0002] In the medical field, high-pressure injectors play an important role in various examinations and treatments. However, there is currently a lack of integrated detection equipment for key parameters such as injection flow, injection pressure, and injection dose of high-pressure injectors.

[0003] Therefore, it is necessary to improve the prior art to overcome the deficiencies in the prior art. INVENTION CONTENTS

[0004] In view of the above, the present application provides a high-pressure injector flow and pressure detection device to solve at least one problem in the background art, comprising:

[0005] A housing having a receiving space;

[0006] A container located in the receiving space for containing the liquid in the high-pressure injector;

[0007] A pipe assembly including a liquid inlet pipe, a liquid outlet pipe, a detection pipe, a first valve body disposed on the liquid inlet pipe, and a second valve body disposed on the liquid outlet pipe. The liquid inlet pipe has an inlet connected to the high-pressure injector, a first liquid inlet, and a second liquid inlet in communication with the inlet. The liquid outlet pipe has an outlet and a first liquid outlet and a second liquid outlet in communication with the outlet. The first liquid inlet and the first liquid outlet are in communication with the container. The detection pipe communicates the second liquid inlet and the second liquid outlet. The first valve body allows the inlet to selectively communicate with the first liquid inlet or the second liquid inlet. The second valve body is adapted to control the conduction of the second liquid inlet and the second liquid outlet.

[0008] A flow detection module is disposed below the container and includes a master balance connected to a control unit and a timing unit. The master balance can detect the weight change of the liquid in the container in real time. The timing unit can synchronize timing.

[0009] A pressure detection module is connected to the controller and is disposed on the detection pipe between the first valve body and the second valve body for detecting the pressure in the high-pressure injector.

[0010] Optionally, the high-pressure injector flow and pressure detection device described above has a first liquid inlet axis parallel to the horizontal plane.

[0011] Optionally, the high-pressure injector flow and pressure detection device, the detection device further comprises a flow guide structure connected with the first liquid inlet, and the flow guide structure has a flow outlet arranged close to the side wall of the container to make the liquid flow along the side wall of the container.

[0012] Optionally, the high-pressure injector flow and pressure detection device, the flow guide structure comprises a communication pipe connected with the first liquid inlet and a flow guide wall connected with the communication pipe, the flow guide wall comprises a first wall body connected with the communication pipe and a second wall body located below the first wall body, a flow guide channel is formed between the first wall body and the second wall body, one end of the flow guide channel is communicated with the communication pipe, and the other end is provided with the flow outlet.

[0013] The flow guide wall is in a trumpet shape.

[0014] Optionally, the high-pressure injector flow and pressure detection device, the flow guide wall has a first end and a second end arranged oppositely, and the first end is communicated with the communication pipe.

[0015] The second end of the second wall body protrudes out of the first wall body.

[0016] Optionally, the high-pressure injector flow and pressure detection device, the container is in a cylindrical shape.

[0017] The distance between the second end of the second wall body and the side wall of the container is 0.3-1 cm.

[0018] Optionally, the high-pressure injector flow and pressure detection device, the second wall body is an inner concave arc-shaped plate.

[0019] Optionally, the high-pressure injector flow and pressure detection device, a detachable flexible filter is further arranged between the communication pipe and the flow guide wall.

[0020] Optionally, the high-pressure injector flow and pressure detection device, a buffer pad is further arranged between the container and the flow detection module.

[0021] Optionally, the high-pressure injector flow and pressure detection device, a liquid level sensor is arranged in the container.

[0022] Compared with the prior art, the application has the following beneficial effects: the application is provided with the pipeline assembly, the flow detection module and the pressure detection module, the flow detection module is connected with the control unit to realize real-time detection of the weight change of the liquid in the container, realize detection of different flow points, and the flow detection module is provided with the timing unit to avoid human error caused by manual timing; the inlet is selectively communicated with the first liquid outlet or the second liquid outlet, flow detection and pressure detection of the high-pressure syringe can be realized on the same device, two detection devices are not needed, and function sharing is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the high-pressure syringe flow and pressure detection device shown in the embodiment;

[0024] Figure 2 is a schematic diagram of the flow guide structure in the high-pressure syringe flow and pressure detection device shown in the embodiment;

[0025] Figure 3 is a structural schematic diagram of the flexible filter screen shown in the embodiment;

[0026] Figure 4 is a circuit block diagram of the flow detection module and the pressure detection module shown in the embodiment.

[0027] REFERENCE SIGNS:

[0028] 1 - shell, 2 - container, 3 - pipeline assembly, 31 - liquid inlet pipeline, 311 - inlet, 312 - first liquid inlet, 313 - second liquid inlet, 32 - liquid outlet pipeline, 321 - first liquid outlet, 322 - second liquid outlet, 33 - detection pipeline, 34 - first valve body, 35 - second valve body, 4 - flow detection module, 5 - pressure detection module, 6 - flow guide structure, 61 - communication pipe, 62 - flow guide wall, 621 - first wall body, 622 - second wall body, 7 - flexible filter, 71 - support, 72 - filter screen. DETAILED DESCRIPTION

[0029] The exemplary embodiments disclosed by the application will be described in more detail below. In the following description, numerous specific details are given to provide a more thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without one or more of these specific details. In other instances, well-known features are not described in detail to avoid obscuring the application. In this description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features are not described in detail to avoid obscuring the application.

[0030] It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application. Similarly, a second element, component, region, layer or section discussed below could be termed a first element, component, region, layer or section without departing from the teachings of the present application.

[0031] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or

[0032] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] For a thorough understanding of the present application, reference should be made to the following detailed description together with the accompanying drawings, in which:

[0034] In the medical field, high-pressure injectors are widely used in medical examinations such as enhanced scanning, which can quickly inject contrast agents and other liquids into the patient's body at a high pressure. However, since the high-pressure injector needs different flow outputs in different scenarios, the different flow points and pressures of the high-pressure injector need to be detected to ensure that the high-pressure injector can output the required flow in different situations.

[0035] Please refer to Figure 1 and Figure 2 The high-pressure injector flow and pressure detection device shown in a preferred embodiment of the present application is used to detect the injection flow, injection pressure, etc. of the high-pressure injector to calibrate it.

[0036] In the industry, flow detection usually includes mass method and volume method. However, the problem of volume method for detecting flow is that the constant volume detection method used by volume method will cause large errors due to the differences in temperature, density of the medium, accuracy of the detection instrument and detection environment. The mass method calculates the flow according to the detected liquid mass, and compared with the mass method, the mass method has fewer influencing factors through weighing, which can improve the accuracy and precision of the detection results.

[0037] However, the injection rate of the high-pressure injector is usually greater than 1.0 mL / s (much larger than the ordinary medical injection pump), and due to the relatively large injection rate, it is difficult to detect. In the prior art, the method simultaneously operates the high-pressure injector injection and simultaneously uses a stopwatch to manually time the flow of the high-pressure injector at different time points, but this way will produce human error, and too many standard devices will cause transportation inconvenience, low detection efficiency, and may not be able to well carry out on-site calibration.

[0038] In order to solve the above problems, in the embodiment, the high-pressure injector flow and pressure detection device includes a housing 1 with a containing space, a container 2 located in the containing space, a pipeline assembly 3, a flow detection module 4 and a pressure detection module 5. The container 2 is used to contain the liquid in the high-pressure injector, the flow detection module 4 is arranged below the container 2 and connected with the control unit, which can detect the weight change of the liquid in the container 2 in real time, thereby reducing the error caused by manual timing.

[0039] It should be noted that in the embodiment, reference Figure 1 and Figure 4As shown, the flow detection module 4 includes a high-precision balance connected with the control unit, a timing unit, an amplification unit and a filter unit. The high-precision balance can detect the weight change of the liquid in the container 2 in real time. The timing unit can synchronize timing. The high-precision balance is connected with the amplification unit, the amplification unit is connected with the filter unit, and the filter unit is connected with the controller, so that the high-precision balance amplifies the detection signal through the amplification unit, and the detection signal is finally output from the controller after being filtered by the filter unit. The filter unit is a FIR filter, which is used to reduce the high-frequency signal interference generated by the outside world, ensure that the output of the sensor is a constant direct current voltage, and thus improve the stability and accuracy of the signal.

[0040] Further, the pipeline assembly 3 includes a liquid inlet pipeline 31, a liquid outlet pipeline 32, a detection pipeline 33, a first valve body 34 arranged on the liquid inlet pipeline 31, and a second valve body 35 arranged on the liquid outlet pipeline 32. The liquid inlet pipeline 31 has an inlet 311 connected with the high-pressure injector, a first liquid inlet 312 and a second liquid inlet 313 in communication with the inlet 311 respectively. The liquid outlet pipeline 32 has an outlet, a first liquid outlet 321 and a second liquid outlet 322 in communication with the outlet. The first liquid inlet 312 and the first liquid outlet are in communication with the container 2 respectively. The detection pipeline 33 is in communication with the second liquid inlet 313 and the second liquid outlet. The first valve body 34 can selectively connect the inlet 311 with the first liquid inlet 312 or the second liquid inlet 313. The second valve body 35 is adapted to control the conduction of the second liquid inlet 313 and the second liquid outlet 322.

[0041] It can be understood that by arranging the first liquid inlet 312 and the second liquid inlet 313 connected with the inlet 311, the inlet 311 can be selectively connected with the first liquid inlet 312 or the second liquid inlet 313, so that the same device can realize flow detection and pressure detection of the high-pressure injector. When the flow of the high-pressure injector needs to be detected, the inlet 311 is connected with the first liquid inlet 312, and the liquid in the high-pressure injector enters the container 2 from the first liquid inlet 312. At the same time, the flow detection module 4 below the container 2 performs timing and weighing to obtain the flow at different time points. After the detection is completed, the liquid in the container 2 is discharged from the first liquid outlet. When the pressure of the high-pressure injector needs to be detected, the inlet 311 is connected with the second liquid inlet 313, so that the liquid enters the detection pipeline 33. The pressure detection module 5 arranged on the detection pipeline 33 can detect the pressure and convert the pressure value into an electrical signal output from the controller.

[0042] Moreover, by integrating the pressure detection module 5 and the flow detection module 4, the size of the entire detection device is 50*15*20cm, which is smaller than the prior art, facilitating transportation and on-site operation.

[0043] In fact, the researchers through high-precision electronic balance to detect a 10 ml / s, 5s time flow (medium water), with high sensitivity camera to shoot the mass change, every 0.5s record a data, these data are plotted as a curve, as shown in Figure 4 It is found that the shorter the injection time, the higher the curve slope, and the greater the error. With the increase of injection time, the curve slope will slowly decrease, and the error will also slowly decrease. After many experiments, it is found that the reason for this situation is that the injection of liquid at the beginning of injection will produce impact pressure on the balance, resulting in the balance detection value being too high. With the increase of the volume of the liquid in the container 2, the impact pressure will become smaller and smaller, and the error of the balance detection value will also decrease accordingly.

[0044] In order to solve the above technical problems, in one embodiment, the central axis of the first liquid inlet 312 is arranged parallel to the horizontal plane, and preferably, the first liquid inlet 312 is arranged close to the bottom of the container 2, so that the liquid in the high-pressure injector can flow smoothly into the container 2, avoiding the impact pressure of the liquid on the container 2, thereby improving the detection accuracy.

[0045] In another embodiment, the detection device further comprises a flow guide structure 6 connected with the first liquid inlet 312, the flow guide structure 6 having a flow outlet arranged close to the side wall of the container 2, so that the liquid flows along the side wall of the container 2, which can also avoid the impact pressure on the container 2, thereby improving the detection accuracy.

[0046] Specifically, referring to Figure 1 and Figure 2 The flow guide structure 6 comprises a communication pipe 61 connected with the first liquid inlet 312 and a flow guide wall 62 connected with the communication pipe 61, the flow guide wall 62 comprising a first wall body 621 connected with the communication pipe 61 and a second wall body 622 located below the first wall body 621, a flow guide channel being formed between the first wall body 621 and the second wall body 622, one end of the flow guide channel being in communication with the communication pipe 61, and the other end being provided with the flow outlet. It should be noted that in this embodiment, the flow guide wall 62 is in the shape of a horn, so as to facilitate the flow of liquid, so that the liquid enters the flow guide channel from the communication pipe 61 and flows out to the side wall of the container 2 along the flow guide channel.

[0047] More specifically, the flow guide wall 62 has a first end and a second end arranged opposite to each other, the first end being in communication with the communication pipe 61; the second end of the second wall body 622 protrudes out of the first wall body 621, so that the second wall body 622 can be as close as possible to the side wall of the container 2, avoiding the impact force caused by splashing of the liquid.

[0048] In this embodiment, the container 2 is cylindrical; the distance between the second end of the second wall 622 and the side wall of the container 2 is 0.3-1cm, so that the liquid can flow along the side wall of the container 2. It will not lose the guiding and buffering effect due to the excessive distance, nor will it cause blockage or affect the flow of liquid due to the insufficient distance, thereby improving the applicability and reliability of the detection device.

[0049] In this embodiment, the second wall 622 is configured as a concave arc-shaped plate, specifically, the arc-shaped plate forms a concave portion from top to bottom. The advantages of this configuration are twofold: firstly, the liquid flows more smoothly downwards along the sidewall of container 2 under the influence of gravity, improving flow stability and preventing turbulence and splashing; secondly, when the liquid flows on the concave arc-shaped plate from top to bottom, gravity plays an auxiliary role, making the impact force of the liquid on the sidewall of container 2 relatively balanced, which can also reduce the possibility of splashing caused by the liquid hitting the sidewall.

[0050] Further, refer to Figure 3 As shown, a detachable flexible filter element 7 is also provided between the connecting pipe 61 and the guide wall 62. The flexible filter element 7 includes a support 71 and a filter screen 72 connected to the support, so as to be installed between the connecting pipe and the guide channel through the support 71. When the liquid impacts the flexible filter element 7, the filter screen 72 will undergo slight deformation and vibration, thereby converting the kinetic energy of the liquid into the elastic potential energy and thermal energy of the filter screen 72 and other forms of energy, reducing the impact force of the liquid on the container 2; and, when the liquid passes through the filter screen 72, its irregular movement and splashing tendency will be weakened, making the liquid more inclined to flow or penetrate smoothly along the surface of the filter screen, thereby avoiding the impact force generated by the liquid due to excessive kinetic energy.

[0051] A buffer pad is also provided between the container 2 and the flow detection module 4 to further reduce the impact of the liquid flow on the detection results. For example, the buffer pad can be made of rubber. It should be noted that the container 2 needs to be fixed during detection to prevent it from shaking and affecting the detection results.

[0052] It should be noted that in other embodiments, the flow guiding structure 6 can also be configured in other forms, as long as the outlet is set close to the side wall of the container 2 so that the liquid can flow along the side wall of the container 2. For example, the flow guiding structure 6 can also be configured as a spiral shape, but these will not be listed one by one here.

[0053] In this embodiment, a liquid level sensor is installed inside the container 2. This liquid level sensor is positioned at 90% of the height of the container 2 and is used to detect the liquid level inside the container 2 to prevent overflow. The above is merely one specific embodiment of this application; any improvements made based on the concept of this application are considered to be within the scope of protection of this application.

Claims

1. A high-pressure injector flow and pressure detection device, characterized in that, include: The casing has accommodating space; A container, located within the accommodating space, is used to contain the liquid in the high-pressure injector; A piping assembly includes an inlet pipe, an outlet pipe, a detection pipe, a first valve body disposed on the inlet pipe, and a second valve body disposed on the outlet pipe. The inlet pipe has an inlet connected to the high-pressure injector, a first inlet port and a second inlet port respectively connected to the inlet port. The outlet pipe has an outlet and a first outlet port and a second outlet port connected to the outlet port. The first inlet port and the first outlet port are respectively connected to the container. The detection pipe connects the second inlet port and the second outlet port. The first valve body enables the inlet port to be selectively connected to either the first inlet port or the second inlet port. The second valve body is adapted to control the connection between the second inlet port and the second outlet port. A flow detection module is located below the container and includes a balance and a timing unit connected to the control unit. The balance can detect the weight change of the liquid in the container in real time, and the timing unit can keep time synchronously. A pressure detection module, connected to the control unit, is installed on the detection pipeline and located between the first valve body and the second valve body, for detecting the pressure in the high-pressure injector.

2. The high-pressure injector flow and pressure detection device according to claim 1, characterized in that, The central axis of the first liquid inlet is set parallel to the horizontal plane.

3. The high-pressure injector flow and pressure detection device according to claim 1, characterized in that, The detection device further includes a flow guiding structure connected to the first liquid inlet, the flow guiding structure having an outlet disposed close to the side wall of the container, so that the liquid flows along the side wall of the container.

4. The high-pressure injector flow and pressure detection device according to claim 3, characterized in that, The flow guiding structure includes a connecting pipe connected to the first liquid inlet and a flow guiding wall connected to the connecting pipe. The flow guiding wall includes a first wall body connected to the connecting pipe and a second wall body located below the first wall body. A flow guiding channel is formed between the first wall body and the second wall body. One end of the flow guiding channel is connected to the connecting pipe, and the other end is provided with the flow outlet. The guide wall is funnel-shaped.

5. The high-pressure injector flow and pressure detection device according to claim 4, characterized in that, The guide wall has a first end and a second end disposed opposite to each other, and the first end is connected to the connecting pipe; The second end of the second wall protrudes out of the first wall.

6. The high-pressure injector flow and pressure detection device according to claim 5, characterized in that, The container is cylindrical; The distance between the second end of the second wall and the side wall of the container is 0.3-1cm.

7. The high-pressure injector flow and pressure detection device according to claim 4, characterized in that, The second wall is a concave arc-shaped plate.

8. The high-pressure injector flow and pressure detection device according to claim 4, characterized in that, A detachable flexible filter element is also provided between the connecting pipe and the guide wall.

9. The high-pressure injector flow and pressure detection device according to any one of claims 1-8, characterized in that, A buffer pad is also provided between the container and the flow detection module.

10. The high-pressure injector flow and pressure detection device according to any one of claims 1-8, characterized in that, A liquid level sensor is installed inside the container.

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