CN213189504U

CN213189504U - Non-invasive pipeline temperature measuring device for continuous blood purification equipment

Info

Publication number: CN213189504U
Application number: CN202021017356.3U
Authority: CN
Inventors: 高光勇; 李绍林; 高兴龙; 朱平
Original assignee: Sws Hemodialysis Care Co ltd
Current assignee: Sws Hemodialysis Care Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-05-14
Anticipated expiration: 2030-06-05

Abstract

The utility model belongs to the technical field of medical instrument, specifically disclose a be used for continuous blood clarification plant non-invasive pipeline temperature measuring device, including the inside sealed box body that can open and shut that has pipeline holding passageway, be provided with curved conducting strip on pipeline holding passageway, the conducting strip is connected with at least one temperature sensor, and after pipeline holding passageway was put into to the pipeline, the box body can be closed sealed and compress tightly the laminating with pipeline and conducting strip. By adopting the technical scheme, the temperature in the device is ensured not to be influenced by the outside through the sealing box body, and the accuracy of the temperature detection of the tube wall is ensured through the temperature sensor.

Description

Non-invasive pipeline temperature measuring device for continuous blood purification equipment

Technical Field

The utility model belongs to the technical field of medical instrument, a be used for non-invasive pipeline temperature measuring device of continuous blood purification equipment is related to.

Background

Crrt (continuous renal replacement therapy) is a general term for all treatment modes of continuously and slowly removing water and solutes, and is a blood purification technology supporting the functions of human organs. With the development of blood purification technology, CRRT is not limited to the treatment of acute and chronic renal insufficiency, but has been gradually expanded to the rescue and treatment of patients with acute and severe symptoms such as Multiple Organ Dysfunction Syndrome (MODS), Systemic Inflammatory Response Syndrome (SIRS), fulminant hepatic failure, and severe hemorrhagic necrotizing pancreatitis.

The blood purification technology is similar to that of venous transfusion, but the speed of physiological saline is low during the venous transfusion, generally 40-60 drops/min (160-240 mL/h), the influence on the body temperature of a human body is small, and heating is not needed. However, in the CRRT treatment process, a large amount of replacement fluid (similar to physiological saline, with the speed up to 4000-6000 mL/h) needs to be supplemented into a human body, the replacement fluid needs to be heated to about 37 ℃ before being supplemented into the human body, otherwise, a patient feels cold, and even causes low-temperature disease of the patient.

And the pipeline for replenishing the replacement liquid and the replacement liquid is required to be sterile and closed, a temperature sensor cannot be directly inserted into the pipeline to measure the temperature of the replacement liquid, otherwise bacteria and viruses can enter the human body, and the health of a patient is not good. Thus, it is quite difficult to accurately measure the temperature inside the pipe, and the accuracy of temperature measurement is the basis of heating temperature control. In the prior art, the infrared temperature measuring device is adopted to detect the temperature of the pipeline, but the precision of the infrared temperature measuring device is not high, and the infrared temperature measuring device is easily influenced by the temperature of the external environment, meanwhile, the infrared temperature measuring device is used for measuring the temperature in a non-contact manner, and the distance between the device and the pipeline to be measured can also influence the detection accuracy of the infrared temperature measuring device. Inaccurate temperature measurement can cause hypothermia of the patient due to too low temperature of the replacement liquid for a long time or hemolysis of the patient due to too high temperature (over 40 ℃), which causes harm to the health of the patient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for continuous blood clarification plant non-invasive pipeline temperature measuring device, avoid external environment temperature and measuring distance to influence the measuring accuracy of device, solve the not high problem of temperature measurement accuracy.

In order to achieve the above object, the basic scheme of the utility model is: the utility model provides a be used for continuous blood clarification plant non-invasive pipeline temperature measuring device, includes that inside has the sealed box body that can open and shut of pipeline holding passageway be provided with curved conducting strip on the pipeline holding passageway, the conducting strip is connected with at least one temperature sensor, and after the pipeline was put into pipeline holding passageway, sealed box body can be closed sealed and compress tightly the laminating with pipeline and conducting strip.

The working principle and the beneficial effects of the basic scheme are as follows: the sealing box body clamps the pipeline in the pipeline accommodating channel through opening and closing actions, and the operation is simple. One section in the pipeline holding passageway is arranged in to the pipeline, receives the seal structure effect of sealed box body, and the outer wall of this section pipeline does not contact with external environment, and the heat of transmission to the pipeline outer wall in the pipeline does not receive external environment temperature to influence, guarantees the accuracy to pipeline outer wall temperature detection. When the sealing box body is closed, the pipeline is tightly attached to the heat conducting fins, so that the distance between the detection device and the pipeline to be detected does not need to be set, the connection is more tight, and the measurement error caused by the measurement distance is avoided. The conducting strip is according to pipeline shape arc design, and increase conducting strip and pipeline outer wall laminating area compare with the direct and pipeline outer wall contact of first temperature sensor: increase the heated area on the one hand and can effectively reduce temperature sensor response lag problem, the heat of on the other hand pipeline outer wall distributes itself inhomogeneous, and the conducting strip can reach the balance with the heat of the pipeline outer wall that it laminated in self, then transmits the temperature after this even balance to first temperature sensor again, improves the accuracy of measurement.

Further, sealed box body includes base and lid, the whole or part of pipeline holding passageway is located the base, the lid is equipped with the briquetting towards one side of base, and when sealed box body lid, the briquetting offseted with the pipeline.

Realize opening and shutting of sealed box body through base and lid, and the lid is fashionable, and the briquetting offsets with the pipeline to this compresses tightly the pipeline to pipeline holding passageway, guarantees that pipeline and conducting strip laminating are inseparable.

Further, a spring is arranged between the pressing block and the cover body, one end of the spring is fixedly connected with one side, facing the cover body, of the pressing block, and the other end of the spring is fixedly connected with the cover body.

The spring can carry on spacingly to the briquetting, avoids the crooked maloperation of briquetting, and when the briquetting offset with the pipeline, the spring is in compression state, and the spring can apply reverse elastic force to the briquetting, guarantees that the briquetting supports with the pipeline and presses closely.

Further, the base is internally provided with a cavity, at least two supporting plates are arranged in the cavity, the supporting plates are perpendicular to the pipeline accommodating channel, and the heat conducting fins are arranged on the supporting plates.

The conducting strip is placed in the backup pad, and the area of contact of conducting strip and backup pad is little, avoids producing a large amount of heat transfer between conducting strip and the backup pad, reduces the conducting strip heat dissipation, guarantees the accuracy of measuring the temperature.

Further, the lower part of the heat conducting sheet is provided with a hidden groove, and the first temperature sensor is placed in the hidden groove.

First temperature sensor places inside the conducting strip, compares at the conducting strip surface with the setting, avoids first temperature sensor and other material contact except that the conducting strip and causes the false detection, also avoids first temperature sensor to occupy extra space and increase device volume simultaneously.

Furthermore, the side surface of the pressing block facing to one side of the pipeline is a curved surface attached to the pipeline.

When briquetting and pipeline offset, the curved surface and the pipeline laminating of briquetting have strengthened the stability when supporting the pressure, and for avoiding the influence of briquetting to pipe wall temperature, the area of curved surface can suitably reduce on the briquetting simultaneously.

And the temperature signal output ends of the first temperature sensor and the second temperature sensor are respectively and correspondingly connected with the temperature signal input end of the processor.

The processor receives the temperature signals transmitted by the first temperature sensor and the second temperature sensor, processes the signals and outputs the temperature of the replacement liquid in the pipeline.

Drawings

FIG. 1 is a schematic structural view of an opened sealed box of an embodiment of a non-invasive device for measuring the temperature of a pipeline of a continuous blood purification apparatus according to the present invention;

FIG. 2 is a schematic view of the sealed box of FIG. 1 in a closed configuration;

FIG. 3 is a schematic diagram of the structure inside the cavity of the base of the non-invasive device for measuring the temperature of the tube of the continuous blood purification apparatus according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of the inside of the cover body of the non-invasive pipe temperature measuring device of the continuous blood purifying equipment.

Reference numerals in the drawings of the specification include: the heat-conducting pipe comprises a base 1, a cover body 2, a pipe 3, a pipe accommodating channel 4, a heat-conducting fin 5, a supporting plate 6, a pressing block 7 and a spring 8.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and 2: the utility model discloses a sealed box body that can open and shut including inside pipeline holding passageway that has, sealed box body include base 1 and the lid 2 that can open and shut, and pipeline holding passageway 4's whole or part are located base 1. The side face of the base 1 parallel to the pipeline accommodating channel 4 and the side edge of the cover body 2 can be hinged but not limited to hinged, and the cover body 2 is connected with the base 1 far away from one side of the hinged end in a buckling mode.

This embodiment is preferred, when pipeline holding passageway 4 all sets up on base 1, the opening of pipeline holding passageway 4's top for placing the pipeline, pipeline holding passageway 4's width and highly all equal to or be greater than the outer diameter of pipeline 3, pipeline 3 holds in pipeline holding passageway 4 completely, pipeline holding passageway 4 is inseparabler with being connected of pipeline 3, stability when placing is better, and pipeline holding passageway 4's lateral wall surrounds pipeline 3 side, avoid the heat of pipeline 3 outer wall to disperse, better heat preservation effect has. And another preferred, when pipeline holding passageway 4 part sets up on base 1, pipeline holding passageway 4 highly is less than the outside diameter of pipeline 3, and pipeline 3 part is placed in pipeline holding passageway 4, and the partial pipe shaft of pipeline 3 is located the outside of pipeline holding passageway 4, simple to operate.

As shown in fig. 1 and 3, the pipe accommodating passage 4 includes a heat conducting fin 5, and the heat conducting fin 5 preferably has an arc structure, and more preferably has an arc shape matching with the arc shape of the outer surface of the pipe. The lower part of the heat conducting fin 5 is provided with a hidden groove, at least one first temperature sensor is sealed in the hidden groove, and the temperature of the outer wall of the pipeline is accurately detected through the heat conducting fin and the first temperature sensor. After the pipeline 3 is placed into the pipeline accommodating channel 4, the sealing box body can be closed to enable the pipeline 3 and the heat conducting fins 5 to be tightly pressed and attached in a sealing mode. One or two first temperature sensors can be arranged as required, the two first temperature sensors can be arranged to compare two temperature signals according to the collected two temperature signals, and whether temperature detection is accurate or not is checked.

The inside cavity that is equipped with of base 1 is equipped with two piece at least backup pads 6 in the cavity, and 6 perpendicular to pipeline holding passageways 4 of backup pad, 6 one end of backup pad and cavity inner wall welding, the other end stretch to pipeline holding passageway 4 and be connected with conducting strip 5, and preferred backup pad is the heat-insulating material, and the one end that backup pad 6 is close to conducting strip 5 sets up to the arcwall face, and conducting strip 5 places in backup pad 6, and the arcwall face and the 5 laminating of conducting strip of backup pad 6. The base 1 is provided with a Hall element, the Hall element is installed on a circuit board, the circuit board is welded or bonded with the inner wall of the cavity, the sealing box body covers the circuit board, and the magnetic steel is installed at the position of the cover body 2 corresponding to the Hall element on the base 1 and used for sensing whether the sealing box body is closed or not.

As shown in fig. 1 and 4, a pressing block 7 is arranged on one side of the cover body 2 facing the base 1, and the side of the pressing block 7 facing the pipeline 3 is a curved surface attached to the pipeline 3. More preferably, a spring 8 is arranged between the pressing block 7 and the cover body 2, one end of the spring 8 is welded with one side of the pressing block 7 facing the cover body 2, and the other end of the spring 8 is welded with the cover body 2. When the sealing box body is covered, the pressing block 7 is propped against the pipeline 3, and the spring 8 is in a compressed state. Preferably, when the pipeline accommodating channel 4 is completely arranged on the base 1, the width of the pressing block 7 is equal to or less than that of the pipeline accommodating channel 4, so that the pressing block 7 can be ensured to stretch into the pipeline accommodating channel 4 to compress the pipeline 3.

The temperature signal output ends of the first temperature sensor and the second temperature sensor are respectively and correspondingly connected with the temperature signal input end of the processor. The first and second temperature sensors may preferably, but not exclusively, be PT1000, the processor may optionally be an 8086 series conventional microprocessor, supplemented with a heat transfer calculation routine to calculate the temperature in the conduit 3, the heat transfer equation q ═ λ a (T)₁-T₂)。

The displacement fluid within the tube 3 transfers heat to the outer surface of the tube by first convective heat transfer and then to the capsule environment by thermal radiation and second convective heat transfer. Determination of material and wall thickness of the pipe 3, and determination of distance between the second temperature sensor for detecting the temperature of the enclosed environment and the surface of the pipe 3Then, the proportionality constant λ and the heat conducting area a will be fixed values. Measuring the temperature T from the first temperature sensor₁And a second temperature sensor measuring T₂And the heat transfer formula can accurately calculate the temperature in the pipeline.

The operation process during the specific use is as follows: firstly, the cover body 2 is turned over, the sealed box body is controlled to be opened, the pipeline 3 is placed in the pipeline accommodating channel 4, and the cover body 2 is buckled. At the moment, the pressing block 7 abuts against the pipeline 3, the spring 8 is in a compressed state and exerts reverse acting force on the pressing block 7, and the pipeline 3 is pressed by the pressing block 7 and is close to the heat conducting strip 5. The heat of the replacement fluid in the pipeline 3 is transferred to the outer wall of the pipeline 3, the heat is transferred between the heat-conducting fins 5 and the outer wall of the pipeline 3, the first temperature sensor detects the temperature of the heat-conducting fins 5, and temperature signals are generated and transmitted to the processor. Meanwhile, the second temperature sensor detects the temperature signal of the internal environment of the closed box and transmits the temperature signal to the processor, and the processor calculates and outputs the temperature of the fluid in the pipeline 3 by utilizing the heat transfer characteristic.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The non-invasive pipeline temperature measuring device for the continuous blood purifying equipment is characterized by comprising a openable sealing box body with a pipeline accommodating channel inside, wherein an arc-shaped heat conducting fin is arranged on the pipeline accommodating channel and connected with at least one first temperature sensor, and after a pipeline is placed into the pipeline accommodating channel, the sealing box body can be closed and sealed to tightly press and attach the pipeline and the heat conducting fin.

2. The non-invasive tube temperature measuring device for the continuous blood purification apparatus according to claim 1, wherein the sealing case comprises a base and a cover, all or part of the tube receiving channel is located on the base, a pressing block is provided on a side of the cover facing the base, and the pressing block abuts against the tube when the sealing case is covered.

3. The non-invasive tube temperature measuring device for continuous blood purification equipment according to claim 2, wherein a spring is provided between the pressing block and the cover, one end of the spring is fixedly connected with one side of the pressing block facing the cover, and the other end of the spring is fixedly connected with the cover.

4. The non-invasive tube temperature measuring device for a continuous blood purification apparatus according to claim 2, wherein the base has a cavity therein, at least two support plates are disposed in the cavity, the support plates are perpendicular to the tube receiving passage, and the heat conductive fins are disposed on the support plates.

5. The non-invasive tube temperature measuring device for use in a continuous blood purification apparatus according to claim 1, wherein the lower portion of the heat conductive sheet is provided with a dark channel, and the first temperature sensor is disposed in the dark channel.

6. The non-invasive tube temperature measuring device for a continuous blood purification apparatus according to claim 2, wherein the side of the pressure block facing the tube is curved to conform to the tube.

7. The non-invasive tube temperature measuring device for continuous blood purification apparatus according to claim 1, further comprising a processor and a second temperature sensor for detecting the ambient temperature inside the closed box, wherein the temperature signal output terminals of the first temperature sensor and the second temperature sensor are respectively connected with the temperature signal input terminal of the processor.