Dose precision detection device for high-pressure radiography injection
By introducing a drive assembly and a potentiometer assembly into the high-pressure contrast injection device and connecting them with a lead screw and gear transmission, the problem of easy damage to the sensor circuitry was solved, achieving high-precision dose detection and improved safety.
Patent Information
- Application Number
- CN202520573155.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-29
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-03-29
AI Technical Summary
In existing high-pressure contrast injection devices, the position sensor and power connection cable are easily damaged as the push rod moves, resulting in reduced safety and inaccurate dose detection.
It employs a drive assembly, a potentiometer assembly, and a lead screw assembly, which are connected by a lead screw gear and a potentiometer gear transmission to accurately detect the displacement of the tubular push rod, avoid circuit damage, and improve detection accuracy.
It achieves high-precision dose detection, avoids the safety hazards of line damage, and improves the safety and detection efficiency of the device.
Smart Images
Figure CN223682865U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high pressure contrast injection dose detection technical field, specifically be a kind of dose precision detection device of high pressure contrast injection. BACKGROUND
[0002] At present, the measurement method for the dose precision of high pressure contrast injection is mainly to use a position sensor to measure the movement end of the injection push rod and the fixed end of the support. However, the position sensor and the power connection line will move with the movement of the injection push rod. Since the connection line will reciprocate with the push rod, it is easy to cause line damage and reduce the safety of the high pressure contrast injection device. To solve the above problems, the utility model provides a dose precision detection device for high pressure contrast injection. UTILITY MODEL CONTENT
[0003] In view of the above technical deficiencies, the utility model aims to provide a dose precision detection device for high pressure contrast injection. By setting a driving assembly, a potentiometer assembly and a lead screw assembly, the displacement of the tubular push rod can be accurately detected, i.e. the dose can be accurately detected, to avoid the safety hazard of line damage. The technical problems raised in the background technology are solved.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides a dose precision detection device for high pressure contrast injection, comprising: a driving assembly, a potentiometer assembly and a lead screw assembly mounted on a support plate; the potentiometer assembly comprises a potentiometer and a potentiometer gear, the potentiometer is fixedly installed on the support plate, and the output end of the potentiometer is connected to the potentiometer gear; the lead screw assembly comprises a lead screw, a lead screw gear and a tubular push rod, the lead screw is rotatably installed on the support plate through a bearing, the lead screw gear is coaxially installed on the outside of the lead screw, a nut threadedly connected to the lead screw is connected to the tubular push rod, and the distal end of the tubular push rod is connected to a piston rod in a needle cylinder; the lead screw gear is drivingly connected to the potentiometer gear through a transmission gear; the driving assembly drives the lead screw to rotate, thereby driving the piston rod in the needle cylinder and the potentiometer gear to move synchronously.
[0005] Preferably, the lower side of the support plate is connected to a linear guide rail, a limiting slide block is slidingly installed in the linear guide rail, and the limiting slide block is connected to the outside of the tubular push rod; the linear guide rail is parallel to the lead screw, to ensure that the nut and the tubular push rod can move linearly along the guide rail when the lead screw rotates.
[0006] Preferably, the transmission gear is a double-layer stepped gear rotatably mounted on the support plate, and the transmission gear is composed of a long-pitch gear and a short-pitch gear connected integrally; the long-pitch gear is in meshing connection with the screw rod gear, and the short-pitch gear is in meshing connection with the potentiometer gear; by setting the transmission gear as a long-pitch gear and a short-pitch gear, the number of revolutions of the potentiometer gear is amplified under the same displacement length of the tubular push rod, and the detection accuracy of the potentiometer is improved.
[0007] Preferably, the driving assembly comprises a driving motor, a synchronous wheel A and a synchronous wheel B; the synchronous wheel A is rotatably mounted on the support plate; the synchronous wheel B is fixedly connected with the screw rod coaxially; the synchronous wheel A is fixedly connected with the output end of the driving motor; and the synchronous wheel A and the synchronous wheel B are in transmission connection through a synchronous belt.
[0008] Preferably, the non-threaded part of the screw rod is in rotational connection with the support plate, the screw rod gear and the synchronous wheel B, and the threaded part of the screw rod is in threaded connection with the nut; a pressure sensor is mounted on the outer side of the non-threaded part of the screw rod, and the pressure sensor is located between the support plate and the nut; when the pressure sensor detects the extrusion force of the nut, a signal is sent to the controller, and the controller controls the driving motor to stop rotating, which is convenient and practical.
[0009] The dose precision detection device for high-pressure contrast injection has the advantages that:
[0010] 1、The nut on the screw rod is connected with the tubular push rod, the tail end of the tubular push rod moving along the linear guide rail is connected with the piston rod in the needle cylinder, the screw rod gear on the screw rod is in transmission connection with the potentiometer gear, the potentiometer can accurately detect the displacement of the tubular push rod when the driving assembly drives the screw rod to rotate, that is, accurately detect the dose, avoid the safety hazard of line damage, and be convenient and efficient.
[0011] 2、The transmission gear is set as a long-pitch gear and a short-pitch gear, the number of revolutions of the potentiometer gear is amplified under the same displacement length of the tubular push rod, and the detection accuracy of the potentiometer is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.
[0013] Figure 1 The structure diagram of the dose precision detection device for high-pressure contrast injection provided by the present application.
[0014] Figure 2 The dose precision detection device for high-pressure contrast injection provided by the present application.Figure 1 isometric view.
[0015] Figure 3 is Figure 2 sectional view along A-A in Fig.
[0016] Figure 4 is Figure 1 schematic structural view of the angle of elevation.
[0017] Figure 5 is Figure 4 enlarged view of A.
[0018] BRIEF DESCRIPTION OF DRAWINGS
[0019] 1 - support plate, 2 - potentiometer, 21 - potentiometer gear, 3 - lead screw, 31 - lead screw gear, 32 - nut, 33 - tubular push rod, 4 - transmission gear, 5 - needle cylinder, 61 - drive motor, 62 - synchronous wheel A, 63 - synchronous wheel B, 7 - pressure sensor. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0021] Embodiment one:
[0022] As Figures 1 to 5 shown, the present embodiment provides a dose precision detection device for high-pressure contrast injection, comprising: a driving assembly, a potentiometer assembly and a lead screw assembly mounted on a support plate 1. The potentiometer assembly comprises a potentiometer 2 and a potentiometer gear 21, the potentiometer 2 is fixedly installed on the support plate 1, and the output end of the potentiometer 2 is connected to the potentiometer gear 21; the potentiometer 2 is located below the support plate 1, and the output shaft of the potentiometer 2 extends above the support plate 1 and is fixedly connected to the potentiometer gear 21; in actual detection, when the potentiometer gear 21 rotates, the potentiometer 2 can obtain the number of rotations of the potentiometer gear 21 according to the change of the resistance value in it, and then linearly converts the moving distance of the tubular push rod 33 in the following text, which is accurate and efficient.
[0023] Please refer to Figure 1 , Figure 3 and Figure 5As shown, the screw rod assembly includes a screw rod 3, a screw rod gear 31 and a tubular push rod 33, the screw rod 3 is rotatably installed on the support plate 1, the screw rod 3 is coaxially installed with the screw rod gear 31 outside, the nut 32 threaded on the screw rod 3 is connected with the tubular push rod 33, and the end of the tubular push rod 33 is connected with the piston rod in the needle cylinder 5; in use, the position of the needle cylinder 5 is fixed, that is, fixed relative to the support plate 1. Specifically, the lower side of the support plate 1 is connected with a linear guide rail, a limiting sliding block is slidably installed in the linear guide rail, and the limiting sliding block is connected with the outside of the tubular push rod 33; this part is not shown in the figure and is a prior art, the linear guide rail is parallel to the screw rod 3, and is used to ensure that the nut 32 and the tubular push rod 33 can linearly move along the guide rail direction when the screw rod 3 rotates. Specifically, please refer to Figure 3 As shown, the non-threaded part of the screw rod 3 is rotatably connected with the support plate 1, the screw rod gear 31 and the synchronous wheel B63, and the threaded part of the screw rod 3 is threaded with the nut 32; the non-threaded part of the screw rod 3 is installed with a pressure sensor 7 outside, and the pressure sensor 7 is located between the support plate 1 and the nut 32; when the pressure sensor 7 detects the extrusion force of the nut 32, a signal is sent to the controller, and the controller controls the driving motor 61 to stop rotating, which is convenient and practical.
[0024] Please refer to Figure 5 As shown, the screw rod gear 31 is drivingly connected with the potentiometer gear 21 through the transmission gear 4; specifically, the transmission gear 4 is a double-layer stepped gear rotatably installed on the support plate 1, the transmission gear 4 is composed of a long-diameter gear and a short-diameter gear which are integrally connected and coaxial; the long-diameter gear is meshingly connected with the screw rod gear 31, and the short-diameter gear is meshingly connected with the potentiometer gear 21; by arranging the long-diameter gear and the short-diameter gear through the transmission gear 4, the number of rotations of the potentiometer gear 21 is amplified under the same displacement length of the tubular push rod 33, and the detection accuracy of the potentiometer 2 is improved.
[0025] Please refer to Figure 1 As shown, the driving assembly drives the screw rod 3 to rotate, and further drives the piston rod in the needle cylinder 5 and the potentiometer gear 21 to move synchronously. Specifically, the driving assembly includes a driving motor 61, a synchronous wheel A62 and a synchronous wheel B63, the synchronous wheel A62 is rotatably installed on the support plate 1, the synchronous wheel B63 is fixedly connected with the screw rod 3 coaxially, the synchronous wheel A62 is fixedly connected with the output end of the driving motor 61, and the synchronous wheel A62 is drivingly connected with the synchronous wheel B63 through a synchronous belt.
[0026] In actual use, the nut 32 on the screw rod 3 is connected with the tubular push rod 33, the end of the linear guide moving tubular push rod 33 is connected with the piston rod in the needle cylinder 5; the screw rod gear 31 on the screw rod 3 is in transmission connection with the potentiometer gear 21, when the driving assembly drives the screw rod 3 to rotate, the potentiometer 2 can accurately detect the displacement of the tubular push rod 33, that is, accurately detect the dose, avoid the security risk of line damage, convenient and efficient. In addition, by setting the transmission gear 4 into long radius gear and short radius gear, under the same displacement length of the tubular push rod 33, the number of rotations of the potentiometer gear 21 is amplified, the detection accuracy of the potentiometer 2 is improved.
[0027] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. A dose accuracy detection device for high pressure contrast injection, characterized in that, Include: The driving assembly, potentiometer assembly and screw rod assembly are installed on the support plate (1); The potentiometer assembly includes potentiometer (2) and potentiometer gear (21), the potentiometer (2) is fixedly installed on the support plate (1), and the output end of the potentiometer (2) is connected with the potentiometer gear (21); The screw rod assembly includes screw rod (3), screw rod gear (31) and tubular push rod (33), the screw rod (3) is rotatably installed on the support plate (1) through a bearing, the screw rod (3) is coaxially installed with the screw rod gear (31) outside, the nut (32) threaded on the screw rod (3) is connected with the tubular push rod (33), and the tubular push rod (33) is connected with the piston rod in the needle cylinder (5) at the end; The screw rod gear (31) is drivingly connected with the potentiometer gear (21) through the transmission gear (4); the driving assembly drives the screw rod (3) to rotate, and then drives the piston rod in the needle cylinder (5) and the potentiometer gear (21) to move synchronously.
2. The dose accuracy detection device for high pressure contrast injection of claim 1, wherein, The lower side of the support plate (1) is connected with a linear guide rail, a limiting sliding block is slidably installed in the linear guide rail, and the limiting sliding block is connected with the outer side of the tubular push rod (33).
3. A dose accuracy detection device for high pressure contrast injection as defined in claim 2, characterized in that The transmission gear (4) is a double-layer stepped gear rotatably installed on the support plate (1), and is composed of a long-pitch gear and a short-pitch gear connected integrally; the long-pitch gear is meshedly connected with the screw rod gear (31), and the short-pitch gear is meshedly connected with the potentiometer gear (21).
4. A dose accuracy detection device for high pressure contrast injection as defined in claim 3, characterized in that The driving assembly includes driving motor (61), synchronous wheel A (62) and synchronous wheel B (63), the synchronous wheel A (62) is rotatably installed on the support plate (1), the synchronous wheel B (63) is fixedly connected with the screw rod (3) coaxially, the synchronous wheel A (62) is fixedly connected with the output end of the driving motor (61), and the synchronous wheel A (62) and the synchronous wheel B (63) are drivingly connected through a synchronous belt.
5. A dose accuracy detection device for high pressure contrast injection as defined in claim 4, wherein The non-threaded part of the screw rod (3) is rotatably connected with the support plate (1), the screw rod gear (31) and the synchronous wheel B (63), and the threaded part of the screw rod (3) is threadedly connected with the nut (32); the non-threaded part of the screw rod (3) is externally provided with a pressure sensor (7), and the pressure sensor (7) is located between the support plate (1) and the nut (32).