CN219434267U - Pressure box for calibrating intracranial pressure monitor - Google Patents

Abstract

The utility model provides a pressure box for calibrating an intracranial pressure monitor in the technical field of instrument detection, which includes a box body, an elastic plug and a nut. The outer periphery of the probe installation port of the box has an external thread part, and the inner hole is a tapered surface; the elastic plug has a central through hole matching the outer diameter of the probe connection line, and the outer periphery is a tapered surface; the inner side of the circumferential side wall of the nut It has an internal thread that matches the external thread of the probe mounting port. When in use, first put the central through hole of the elastic plug of the intracranial pressure monitor probe sensor, put the sensor in the box, then put the elastic plug into the probe installation port of the box, and tighten the nut. With the help of the tapered surface, when the nut squeezes the elastic plug, the central through hole of the elastic plug is compressed to squeeze the connecting wire of the intracranial pressure monitor probe, forming a reliable seal for the connecting wire and effectively preventing air leakage , which can meet the tightness requirements of the pressure box in the calibration specification and improve the accuracy of the calibration results.

Description

A pressure chamber for calibrating intracranial pressure monitors

technical field

The utility model relates to the technical field of instrument detection, in particular to a pressure box for calibrating an intracranial pressure monitor.

Background technique

In the national metrology technical specification JJF1693-2018 "Calibration Specifications for Intracranial Pressure Monitors", it is recorded that the pressure tank used to calibrate the pressure parameters of intracranial pressure monitors should be within the range of (-5 ~ 20) kPa, the air leakage rate The pressure change within 10min is not more than 0.02kPa. In actual operation, the connection between the pressure box and the monitor probe is poorly sealed and prone to air leakage, which will affect the accuracy of the calibration results. If the joint between the pressure box and the monitor probe connection line is filled with sealant, it will be difficult to disassemble and affect the secondary use. Therefore, there is an urgent need for a pressure box that can improve the sealing performance of the joint between the pressure box and the monitor probe connection line and can be used repeatedly.

Utility model content

In order to overcome the deficiencies of the above-mentioned prior art, the purpose of this utility model is to provide a pressure box for calibrating an intracranial pressure monitor.

In order to achieve the above object, the technical solution adopted by the utility model to solve the technical problem is: a pressure box for calibrating an intracranial pressure monitor, comprising:

The box body has an inner cavity, and the box body is provided with an inflation interface, a detection interface and a probe installation port, the inflation interface is used to connect with a pressure generator, and the detection interface is used to connect with a standard pressure gauge. The outer circumference of the probe installation port has an external thread portion, and the inner hole of the probe installation port is a tapered surface;

An elastic plug, which has a central through hole matching the outer diameter of the intracranial pressure monitor probe connection line, and the outer periphery of the elastic plug is a tapered surface;

The nut includes a top wall part and a circumferential side wall part, the inner side of the circumferential side wall part has an internal thread part matching the external thread part, and the top wall part is provided with an inner thread part for intracranial pressure monitoring. The hole through which the connecting wire of the instrument probe passes.

Adopting the technical scheme of the utility model, when in use, the probe sensor of the intracranial pressure monitor is passed through the central through hole of the elastic plug, the sensor is placed in the box, and then the elastic plug is put into the probe installation port of the box, and the screw is tightened. cap. With the help of the tapered surface, when the nut squeezes the elastic plug, the central through hole of the elastic plug is compressed to squeeze the connecting wire of the intracranial pressure monitor probe, forming a reliable seal for the connecting wire and effectively preventing air leakage , which can meet the tightness requirements of the pressure box in the calibration specification and improve the accuracy of the calibration results.

Further, the circumferential side wall of the nut is provided with a wire-passing side gap for the intracranial pressure monitor probe to pass through, and the wire-passing side gap extends to the wire-passing hole.

With the above preferred scheme, the nut does not need to pass through the probe connecting wire in advance. After the elastic plug is placed in the probe installation opening, the probe connecting wire passes through the side clearance of the nut, and the nut can be tightened, which is convenient. Installation work.

Further, the elastic plug is made of rubber or silicone.

Further, a gasket is also included, and the gasket is arranged between the elastic plug and the nut.

By adopting the above preferred solution, the smoothness of tightening the nut can be improved through the washer.

Further, the edge of the gasket has a flange, and the flange surrounds the outer periphery of the top of the elastic plug.

By adopting the above-mentioned preferred solution, the regulation on the position of the gasket is formed to prevent shifting.

Further, the gasket has a side opening.

By adopting the above preferred solution, it is convenient for the connecting wire to pass through the spacer laterally.

Further, the box body includes a first half cylinder and a second half cylinder, the first half cylinder and the second half cylinder are connected by threads, and the inner end surfaces of the first half cylinder and the second half cylinder An inner sealing ring is provided at the position, and an outer sealing ring is provided at the outer end surface where the first half cylinder and the second half cylinder meet.

By adopting the above preferred solution, the processing and manufacturing of the box body is facilitated.

Further, the probe installation port is located on the first half cylinder, and the inflation interface and detection interface are located on the second half cylinder.

By adopting the above preferred scheme, the screwing operation of the nut is facilitated.

Further, the box body is provided with an annular groove, and a hoop is arranged in the annular groove.

By adopting the above preferred solution, it is convenient to fix the box body.

Further, the nut is provided with two oppositely arranged D cut surfaces.

By adopting the above preferred solution, it is convenient to use a wrench to tighten the nut and improve the locking force.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view of the utility model.

Fig. 3 is a structural diagram of the utility model and probe installation.

Fig. 4 is a schematic structural view of the hoop of the present invention.

Fig. 5 is an exploded view of the structure of the utility model.

Names of corresponding parts indicated by numbers and letters in the figure:

10-box body; 11-inner cavity; 12-inflatable interface; 13-detection interface; 14-probe installation port; 15-first half cylinder; 16-second half cylinder; 17-inner sealing ring; Ring; 19-ring groove; 20-elastic plug; 21-center through hole; 30-nut; 31-top wall; 32-circumferential side wall; 33-passing hole; 34-passing side clearance ; 35-D section; 40-gasket; 41-flange; 42-side opening; 50-clamp; 60-sensor;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1-5, an embodiment of the present utility model is: a pressure box for calibrating an intracranial pressure monitor, comprising:

The box body 10 has an inner cavity 11. The box body 10 is provided with an inflatable interface 12, a detection interface 13 and a probe installation port 14. The inflatable interface 12 is used to connect with a pressure generator, and the detection interface 13 is used to connect with a standard pressure gauge. , the outer circumference of the probe mounting port 14 has an external thread portion, and the inner hole of the probe mounting port 14 is a tapered surface;

The elastic plug 20 has a central through hole 21 matching the outer diameter of the intracranial pressure monitor probe connection line 61, and the outer circumference of the elastic plug 20 is a tapered surface;

The nut 30 comprises a top wall portion 31 and a circumferential side wall portion 32, the inner side of the circumferential side wall portion 32 has an internal thread portion matched with the external thread portion of the probe installation port 14, and the top wall portion 31 is provided with a The wire hole 33 through which the probe connection wire of the intracranial pressure monitor passes.

The beneficial effect of adopting the above-mentioned technical solution is: as shown in Figure 3, when in use, the probe sensor 60 of the intracranial pressure monitor is first passed through the thread hole body 33 of the nut and the central through hole 21 of the elastic plug, and the sensor 60 Put it in the box body 10, put the elastic plug 20 into the probe installation port 14 of the box body, and tighten the nut 30. With the help of the tapered surface, when the nut squeezes the elastic plug, the central through hole of the elastic plug is compressed to squeeze the connecting wire of the intracranial pressure monitor probe, forming a reliable seal for the connecting wire and effectively preventing air leakage , which can meet the tightness requirements of the pressure box in the calibration specification and improve the accuracy of the calibration results.

As shown in Figures 1 and 5, in other embodiments of the present utility model, the circumferential side wall portion 32 of the nut is provided with a line-passing side gap 34 for the probe connection line 61 of the intracranial pressure monitor to pass through. The wire side gap 34 extends to pass through the wire hole body 33 . The beneficial effect of adopting the above technical solution is that the nut does not need to pass through the probe connection line in advance, after the elastic plug is placed in the probe installation opening, the probe connection line passes through the side clearance of the nut, and the nut can be tightened , to facilitate the installation work.

In other embodiments of the present utility model, the material of the elastic plug 20 can be rubber or silica gel.

As shown in FIGS. 2 and 5 , in some other embodiments of the present invention, a gasket 40 is also included, and the gasket 40 is arranged between the elastic plug 20 and the nut 30 . The beneficial effect of adopting the above technical solution is that the contact friction force between the gasket and the nut is low, and the smoothness of tightening the nut is improved.

In some other embodiments of the present invention, the edge of the gasket 40 has a flange 41 , and the flange 41 surrounds the outer periphery of the top of the elastic plug 20 . The beneficial effect of adopting the above-mentioned technical solution is: to form a regulation on the position of the gasket and prevent shifting.

In other embodiments of the present utility model, the gasket 40 is provided with a side opening 42 . The beneficial effect of adopting the above technical solution is: it is convenient for the connecting wire to pass through the spacer laterally.

As shown in Figure 2, in other embodiments of the present utility model, the box body 10 includes a first half cylinder 15 and a second half cylinder 16, and the first half cylinder 15 and the second half cylinder 16 are connected by threads, An inner sealing ring 17 is provided at the inner end surface where the first half cylinder 15 and the second half cylinder 16 meet, and an outer sealing ring 18 is provided at the outer end surface where the first half cylinder 15 and the second half cylinder 16 meet. The beneficial effect of adopting the above technical solution is that the processing and manufacturing of the box body is facilitated.

As shown in FIG. 2 , in some other embodiments of the present invention, the probe installation port 14 is located on the first half cylinder 15 , and the inflation interface 12 and the detection interface 13 are located on the second half cylinder 16 . The beneficial effect of adopting the above-mentioned technical solution is that the screwing operation of the nut is facilitated.

As shown in FIG. 4 , in other embodiments of the present utility model, an annular groove 19 is provided on the box body 10 , and a hoop 50 is arranged in the annular groove 19 . The beneficial effect of adopting the above technical solution is that it is convenient to fix the box body.

As shown in FIG. 1 , in other embodiments of the present invention, the nut 30 is provided with two opposite D cut surfaces 35 . The beneficial effect of adopting the above technical solution is that it is convenient to use a wrench to tighten the nut and improve the locking force.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the utility model should be covered within the protection scope of the utility model.

Claims (10)

1. A pressure chamber for calibrating an intracranial pressure monitor, characterized in that, comprising: The box body has an inner cavity, and the box body is provided with an inflation interface, a detection interface and a probe installation port, the inflation interface is used to connect with a pressure generator, and the detection interface is used to connect with a standard pressure gauge. The outer circumference of the probe installation port has an external thread portion, and the inner hole of the probe installation port is a tapered surface; The elastic plug has a central through hole matching the outer diameter of the intracranial pressure monitor probe connection line, and the outer periphery of the elastic plug is a tapered surface; The nut includes a top wall part and a circumferential side wall part, the inner side of the circumferential side wall part has an internal thread part matching the external thread part, and the top wall part is provided with an inner thread part for intracranial pressure monitoring. The hole through which the connecting wire of the instrument probe passes. 2. The pressure box for calibrating the intracranial pressure monitor according to claim 1, wherein the circumferential side wall of the nut has a passage for the probe connecting wire of the intracranial pressure monitor to pass through. A wire side gap, the wire passing side gap extending to the wire passing hole body. 3. The pressure box for calibrating an intracranial pressure monitor according to claim 1, wherein the elastic plug is made of rubber or silica gel. 4. The pressure box for calibrating an intracranial pressure monitor according to claim 1, further comprising a gasket, the gasket being arranged between the elastic plug and the nut. 5 . The pressure box for calibrating an intracranial pressure monitor according to claim 4 , wherein the edge of the gasket has a flange, and the flange surrounds the outer periphery of the top of the elastic plug. 6 . 6 . The pressure box for calibrating an intracranial pressure monitor according to claim 5 , wherein a side opening is opened on the gasket. 7. The pressure box for calibrating an intracranial pressure monitor according to claim 1, wherein the box body comprises a first half cylinder and a second half cylinder, and the first half cylinder and the second half cylinder The cylinders are connected by threads, and an inner sealing ring is provided at the inner end surface of the first half cylinder and the second half cylinder, and an outer sealing ring is provided at the outer end surface of the first half cylinder and the second half cylinder. . 8. The pressure box for calibrating an intracranial pressure monitor according to claim 7, wherein the probe installation port is located on the first half cylinder, and the inflation interface and detection interface are located on the second half cylinder. on the barrel. 9 . The pressure box for calibrating an intracranial pressure monitor according to claim 1 , wherein a ring groove is arranged on the box body, and a hoop is arranged in the ring groove. 10 . 10 . The pressure box for calibrating an intracranial pressure monitor according to claim 1 , wherein two oppositely arranged D cut surfaces are formed on the nut. 11 .