阅读说明：本技术 一种高压注射器注射压力的检测方法及其系统 (Method and system for detecting injection pressure of high-pressure injector ) 是由 王宇飞 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种高压注射器注射压力的检测方法,涉及医疗设备的技术领域,解决了使用压力应变片检测注射压力不准确、有延迟,且难于拆装的技术问题。该方法通过在高压注射器推杆定位螺栓的底部旋接一与压力传感器定位螺栓相适配的定位座定位螺栓,所述压力传感器定位螺栓的感应端头定位螺栓贯穿定位座,通过所述压力传感器定位螺栓实时监测当前的实时压力值,将所述实时压力值与设定压力值进行对比；根据对比结果控制高压注射器以设定的压力变化量使注射压力稳定至设定压力值。本发明还公开了一种高压注射器的系统。本发明结构合理,可对压力传感器进行有效的定位,提高了检测精度,且拆装简单,便于维护。(The invention discloses a method for detecting injection pressure of a high-pressure injector, relates to the technical field of medical equipment, and solves the technical problems that injection pressure is inaccurate, delayed and difficult to disassemble and assemble by using a pressure strain gauge. According to the method, a positioning seat positioning bolt matched with a pressure sensor positioning bolt is screwed at the bottom of a high-pressure injector push rod positioning bolt, a sensing end positioning bolt of the pressure sensor positioning bolt penetrates through a positioning seat, a current real-time pressure value is monitored in real time through the pressure sensor positioning bolt, and the real-time pressure value is compared with a set pressure value; and controlling the high-pressure injector to stabilize the injection pressure to the set pressure value according to the comparison result. The invention also discloses a system of the high-pressure injector. The invention has reasonable structure, can effectively position the pressure sensor, improves the detection precision, and has simple disassembly and assembly and convenient maintenance.)

1. The method for detecting the injection pressure of the high-pressure injector is characterized in that a positioning seat (8) matched with a pressure sensor (4) is screwed at the bottom of a push rod (3) of the high-pressure injector, an induction end socket of the pressure sensor (4) penetrates through the positioning seat, the current real-time pressure value is monitored in real time through the pressure sensor (4), and the real-time pressure value is compared with a set pressure value; and controlling the high-pressure injector to stabilize the injection pressure to the set pressure value according to the comparison result.

2. The method for detecting the injection pressure of the high-pressure injector according to claim 6, wherein the set pressure value comprises a normal injection pressure value and a stop injection pressure value, and when the real-time pressure value is equal to or greater than the stop injection pressure value, the high-pressure injector stops injecting.

3. The method for detecting the injection pressure of the high-pressure injector according to claim 7, wherein the injection stopping pressure value is 1.2-1.5 times of the normal injection pressure value.

4. The method for detecting the injection pressure of the high-pressure injector as claimed in claim 6, wherein the pressure variation is 5PSI-20 PSI.

5. A high-pressure injector system comprises a driving mechanism (1) and a pushing mechanism (2), wherein the driving mechanism (1) is connected with the pushing mechanism (2), the pushing mechanism (2) comprises a push rod (3) and a matching sleeve (5), a pressure sensor (4) is arranged at the bottom of the push rod (3), the matching sleeve (5) with only one open end is sleeved outside the push rod (3), the matching sleeve (5) is detachably mounted on the push rod (3), the high-pressure injector system is characterized in that a positioning seat (8) is arranged at the bottom of the push rod (3), a groove (81) matched with the pressure sensor (4) is arranged in the positioning seat (8), a mounting through hole (82) is arranged in the groove (81), a positioning plate (83) is arranged between the groove (81) and the mounting through hole (82), and an induction end of the pressure sensor (4) is inserted into the mounting through hole (82), the end face of the induction end protruding out of the installation through hole (82) is in contact connection with the bottom face of the matching body (5), and the front end face of the pressure sensor (4) is in contact connection with the positioning plate (83).

6. The high-pressure injector system according to claim 5, wherein the outer wall of the positioning seat (8) is provided with an external thread, the bottom of the push rod (3) is provided with a mounting groove, the side wall of the mounting groove is provided with an internal thread, the positioning seat (8) is in threaded connection with the push rod (3), and the upper end surface of the positioning seat (8) is lower than a positioning pin mounted on the pressure sensor (4).

7. A high pressure injector system according to claim 5 or 6, characterized in that the outer edge of the positioning socket (8) at one end of the positioning plate (83) is provided with an outwardly extending extension plate (84), the bottom of the adapter sleeve (5) is provided with a socket, and the extension plate (84) is plugged into the socket.

8. A high pressure syringe system according to claim 7, wherein the extension plate (84) is provided with anti-slip texturing on its outside.

9. A high pressure injector system according to claim 5, characterized in that a plurality of positioning bolts (6) are provided on the side of the push rod (3), the positioning bolts (6) mount the adapter (5) on the push rod (3) through long kidney-shaped through holes (7) on the adapter (5), the adapter (5) is mounted on the push rod (3) through the positioning bolts (6); still be equipped with the bar groove that extends to its bottom by push rod (3) top on push rod (3), the bar groove is linked together with the direction logical groove on push rod (3).

Technical Field

The invention relates to the technical field of medical equipment, in particular to a method and a system for detecting injection pressure of a high-pressure injector.

Background

The high pressure syringe is used for injecting medicaments such as contrast agents or physiological saline into a human body for enhancing the medical imaging effect. Therefore, high pressure syringes are a medical device that is often used in medical examinations. The injection pressure of most high-pressure injectors is detected by a pressure strain gauge provided between a drive mechanism and a pushing mechanism of the high-pressure injector. However, the problems of slow response, inaccurate detection and easy damage are easily caused by the detection of the pressure strain gauge, and the installation of the pressure strain gauge is complicated and the operation is not easy.

In order to solve the above problems, researchers have proposed adding a sensor to the needle end of the syringe of the high-pressure syringe or incorporating a sensor in the plunger. Although the two arrangements well avoid the problems, the sensor is added to the needle of the syringe, and the communication line between the sensor and the high-pressure injector greatly hinders the operation of medical personnel and is not convenient for the disassembly and the assembly of the syringe and the connecting pipe. The sensor is arranged in the push rod, but the sensor is directly arranged in the adaptive groove at the bottom of the push rod, and is positioned with the guide through groove on the push rod through the convex positioning pin, and in addition, the sensing end head of the sensor is smaller, so that the sensor is easy to move due to mechanical vibration or gaps among various parts in the use process, and the problem that the sensor is easy to position unstably in the use process, so that the injection pressure of the high-pressure injector is detected inaccurately is caused.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and aims to provide a high-pressure injector which is accurate in detection and convenient to disassemble and assemble.

The invention also aims to provide a method for detecting the injection pressure of the high-pressure injector, which is accurate in detection.

In order to achieve the first purpose, the invention provides a method for detecting the injection pressure of a high-pressure injector, which comprises the steps of screwing a positioning seat matched with a pressure sensor at the bottom of a push rod of the high-pressure injector, enabling an induction end head of the pressure sensor to penetrate through the positioning seat, monitoring the current real-time pressure value through the pressure sensor in real time, and comparing the real-time pressure value with a set pressure value; and controlling the high-pressure injector to stabilize the injection pressure to the set pressure value according to the comparison result.

In a further improvement, the set pressure value includes a normal injection pressure value and a stop injection pressure value, and when the real-time pressure value is equal to or greater than the stop injection pressure value, the high-pressure injector stops injecting.

Further, the stop injection pressure value is 1.2-1.5 times of the normal injection pressure value.

Further, the pressure variation is 5PSI-20 PSI.

In order to achieve the second purpose, the invention provides a high-pressure injector system which comprises a driving mechanism and a pushing mechanism, wherein the driving mechanism is connected with the pushing mechanism, the pushing mechanism comprises a push rod and an adapting sleeve, a pressure sensor is arranged at the bottom of the push rod, the adapting sleeve with only one end open is sleeved outside the push rod, the adapting sleeve is detachably mounted on the push rod, a positioning seat is arranged at the bottom of the push rod, a groove matched with the pressure sensor is formed in the positioning seat, a mounting through hole is formed in the groove, a positioning plate is arranged between the groove and the mounting through hole, an induction end head of the pressure sensor is inserted into the mounting through hole, the end face of the induction end head protruding out of the mounting through hole is in contact connection with the bottom face of the adapting sleeve, and the front end face of the pressure sensor is in contact connection with.

The improved pressure sensor is characterized in that an external thread is arranged on the outer wall of the positioning seat, an installation groove is formed in the bottom of the push rod, an internal thread is arranged on the side wall of the installation groove, the positioning seat is in threaded connection with the push rod, and the upper end face of the positioning seat is lower than a positioning pin arranged on the pressure sensor.

Furthermore, an extending plate extending outwards is arranged on the outer edge of the positioning seat at one end of the positioning plate, an inserting groove is formed in the bottom of the matching body, and the extending plate is inserted into the inserting groove.

Furthermore, the outer side of the extension plate is provided with anti-skid lines.

Furthermore, a plurality of positioning bolts are arranged on the side surface of the push rod, the positioning bolts are used for installing the adaptive sleeve on the push rod through the long waist-shaped through holes on the adaptive sleeve, and the adaptive sleeve is installed on the push rod through the positioning bolts; still be equipped with the bar groove that extends to its bottom by the push rod top on the push rod, the bar groove is linked together with the direction logical groove on the push rod.

Advantageous effects

The invention has the advantages that: the bottom of a push rod of the high-pressure injector is screwed with a positioning seat matched with a pressure sensor, the current injection pressure value is monitored in real time through the pressure sensor, the injection pressure value is compared with a set pressure value, and the high-pressure injector is injected according to the set injection pressure value. Compared with the prior art, the pressure sensor is well positioned in the injection process, the problem of inaccurate measurement caused by mechanical vibration or movement of gaps among parts is avoided, the pressure sensor arranged at the end part of the push rod can more effectively detect the injection pressure, and the detection precision is higher and the feedback speed is high. The positioning seat is screwed at the lower end of the push rod, so that the pressure sensor is convenient to maintain and replace, and the convenience of maintaining and repairing the high-pressure injector is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the mounting structure of the push rod and the adapter of the present invention;

fig. 4 is a schematic sectional view of the positioning seat structure of the present invention.

Wherein: 1-driving mechanism, 2-pushing mechanism, 3-push rod, 4-pressure sensor, 5-matching set, 6-positioning bolt, 7-long waist-shaped through hole, 8-positioning seat, 81-groove, 82-installation through hole, 83-positioning plate and 84-extension plate.

Detailed Description

The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.

A method for detecting injection pressure of a high-pressure injector comprises the steps that a positioning seat 8 matched with a pressure sensor 4 is screwed at the bottom of a push rod 3 of the high-pressure injector, an induction end socket of the pressure sensor 4 penetrates through the positioning seat 8, the current real-time pressure value is monitored in real time through the pressure sensor 4, and the real-time pressure value is compared with a set pressure value; and controlling the high-pressure injector to stabilize the injection pressure to the set pressure value according to the comparison result. Namely, a positioning seat 8 matched with a pressure sensor 4 is screwed at the bottom of a push rod 3 of the high-pressure injector, the current injection pressure value is monitored by the pressure sensor 4 in real time, the injection pressure value is compared with a set pressure value, and the high-pressure injector is injected at the set injection pressure value. Compare and use prior art, pressure sensor 4 has obtained fine location at the injection in-process, has avoided making the inaccurate problem of measurement because of there is the removal that the clearance produced between mechanical vibration or each parts, uses to install pressure sensor 4 at 3 tip of push rod can more effectively detect injection pressure, and detects that the precision is higher, the feedback is fast. The positioning seat 8 is screwed at the lower end of the push rod 3, so that the pressure sensor 4 is convenient to maintain and replace, and the convenience of maintaining and repairing the high-pressure injector is improved.

The set pressure value comprises a normal injection pressure value and a stop injection pressure value, and when the real-time pressure value is equal to or greater than the stop injection pressure value, the high-pressure injector stops injecting. By setting the injection stopping pressure value, the damage to the high-pressure injector caused by continuous injection after the injection is finished is avoided, and meanwhile, the problem of medical accidents caused by sudden injection pressure change in the injection process is also avoided. Preferably, the stop injection pressure value is 1.2 to 1.5 times the normal injection pressure value. By setting the stop injection pressure value to be 1.2-1.5 times of the normal injection pressure value, if the injection pressure is suddenly changed, the sudden change of the injection pressure is not too large, so that great harm is brought to a patient. Preferably, the pressure change is 5PSI-20 PSI. The injection pressure to the patient is mostly 150PSI-300PSI at present, but if the injection pressure is changed too much, the patient is easy to be uncomfortable. Through setting the pressure variation between 5PSI-20PSI, thereby make the slow change of pressure reach the setting value, make the better adaptation of patient inject, played better guard action to the patient.

Referring to fig. 1-4, a high pressure injector system includes a driving mechanism 1 and a pushing mechanism 2, wherein the driving mechanism 1 is connected with the pushing mechanism 2. The device also comprises a shell and a control unit, wherein the driving mechanism 1, the pushing mechanism 2 and the control unit are all arranged in the shell, and the driving mechanism 1 and the pressure sensor 4 are all connected with the control unit. Wherein, the pushing mechanism 2 comprises a push rod 3 and an adapting sleeve 5. The bottom of the push rod 3 is provided with a pressure sensor 4. Specifically, be equipped with a locating pin on pressure sensor 4, the bottom of push rod 3 is equipped with one with the adaptation groove of 4 looks adaptations of pressure sensor, is equipped with the logical groove of the direction in a vertical through adaptation groove on the lateral wall in adaptation groove, and pressure sensor 4 installs in the adaptation groove, and the locating pin is arranged the logical inslot of direction in. The outer sleeve of the push rod 3 is provided with an adaptive sleeve 5 with only one end opened, and the adaptive sleeve 5 is detachably arranged on the push rod 3. The bottom of push rod 3 is equipped with a locating seat 8, is equipped with the recess 81 with pressure sensor 4 looks adaptation in the locating seat 8, is equipped with an installation through-hole 82 in the recess 81, and is equipped with locating plate 83 between recess 81 and the installation through-hole 82, and pressure sensor 4's response end alternates in installation through-hole 82, and the terminal surface of response end protrusion and installation through-hole 82 is connected with the bottom surface contact of adaptation cover 5, and pressure sensor 4's preceding terminal surface is connected with locating plate 83 contact. Through the positioning effect of the positioning seat 8 on the pressure sensor 4, the problem that the pressure sensor 4 is inaccurate in measurement due to mechanical vibration or movement caused by gaps among parts is avoided, the measurement effect on the injection pressure is better, and the detection precision is higher.

The outer wall of positioning seat 8 is equipped with the external screw thread, and the bottom of push rod 3 is equipped with a mounting groove, and the lateral wall of mounting groove is equipped with the internal thread, and positioning seat 8 and 3 threaded connection of push rod make positioning seat 8 and pressure sensor 4 can be quick dismantle from push rod 3, are convenient for maintain the change to pressure sensor 4, have improved the convenience of the maintenance to this high pressure syringe. The upper end face of the positioning seat 8 is lower than a positioning pin arranged on the pressure sensor 4, so that the influence of the positioning pin on the positioning seat 8 in the installation process is avoided. Preferably, the outer edge of the positioning seat 8 at one end of the positioning plate 83 is provided with an extending plate 84 extending outwards, the bottom of the adapting sleeve 5 is provided with an inserting groove, the extending plate 84 is inserted into the inserting groove, and a gap is formed between the extending plate 84 and the bottom of the inserting groove. The bottom of the extension plate is not contacted with the bottom of the insertion groove, so that the sensing end head of the pressure sensor 4 is effectively contacted with the bottom end face of the adapting sleeve 5, and the injection pressure is effectively detected. Through extension plate 84, positioning seat 8 can be conveniently disassembled and assembled. Preferably, the outer side of the extension plate 84 is provided with anti-slip lines, so that the positioning seat 8 can be easily disassembled.

Specifically, a plurality of positioning bolts 6 are arranged on the side surface of the push rod 3 for high-pressure injection, the matching sleeve 5 is installed on the push rod 3 through long waist-shaped through holes 7 on the matching sleeve 5 by the positioning bolts 6, and the matching sleeve 5 is installed on the push rod 3 through the positioning bolts 6. When the pressure sensor is disassembled, the matching sleeve 5 can be taken down only by screwing down the positioning bolt 6 on the push rod 3, the disassembly and the assembly are convenient, and the maintenance and the repair of the pressure sensor 4 are easy. Still be equipped with the bar groove that extends to its bottom by 3 tops of push rod on the push rod 3, the bar groove is linked together with the logical groove of direction on the push rod 3. In this embodiment, the wire that pressure sensor 4 and the control unit communicate can be drawn forth through the locating pin, then installs in the bar inslot, avoids the influence of wire to high-pressure syringe injection process.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the invention, which will not affect the effect of the invention and the practicability of the patent.