CN215893883U

CN215893883U - Pressure monitoring mechanism and pressure detection device

Info

Publication number: CN215893883U
Application number: CN202121302229.2U
Authority: CN
Inventors: 胡进勋; 吴桐
Original assignee: Nanyang Clear Technology Co Ltd
Current assignee: Nanyang Clear Technology Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-02-22
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a pressure monitoring mechanism and a pressure detection device, and relates to the technical field of pressure detection. The pressure monitoring mechanism comprises a shell and a pressure monitoring assembly; the shell is provided with an inflow port, an outflow port and a channel, the inflow port and the outflow port are respectively communicated with the channel, and the inflow port and the outflow port are respectively connected with a pipeline; the pressure monitoring assembly at least comprises two monitoring elements, each monitoring element is arranged on the shell and circumferentially arranged on the channel along the channel, and the monitoring elements can be deformed by the pressure of fluid in the channel. The utility model solves the technical problem that the mode for monitoring and detecting the fluid pressure in the pipeline is unreliable in the prior art.

Description

Pressure monitoring mechanism and pressure detection device

Technical Field

The utility model relates to the technical field of pressure detection, in particular to a pressure monitoring mechanism and a pressure detection device.

Background

In some pipelines for passing fluid, such as infusion tubes, water tubes, etc., based on safety considerations, for example, when a human body or an animal is injected or infused in vivo, the fluid pressure of the liquid medicine in the infusion tube can have different effects on the human body or the animal; the phenomenon of pipeline rupture can be caused by overlarge fluid pressure in the water pipe; it is necessary to know the pressure of the fluid in the pipeline in real time to ensure the safety of human or animals or to avoid the rupture of the pipeline. The existing pipeline pressure detection method generally monitors or detects the pressure of fluid in a pipeline by installing a pressure sensor on the pipeline, but the method lacks data capable of mutual authentication due to single monitoring or detected data, so that the monitoring or detected result is unreliable.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a pressure monitoring mechanism, which is used to solve the technical problem in the prior art that the way for monitoring or detecting the pressure of fluid in a pipe is not reliable.

A pressure monitoring mechanism comprises a shell and a pressure monitoring assembly; the shell is provided with an inflow port, an outflow port and a channel, the inflow port and the outflow port are respectively communicated with the channel, and the inflow port and the outflow port are respectively connected with a pipeline;

the pressure monitoring assembly at least comprises two monitoring elements, each monitoring element is arranged on the shell and circumferentially arranged on the channel along the channel, and the monitoring elements can be deformed by the pressure of fluid in the channel.

In some embodiments of the pressure monitoring mechanism, the housing is provided with a plurality of cavities, and the cavities are circumferentially arranged on the channel along the channel and are communicated with the channel; each monitoring element corresponds to the cavity in a one-to-one mode and at least partially covers the cavity, so that fluid pressure can enable the monitoring elements to deform relative to the cavity.

In some embodiments of the pressure monitoring mechanism, the housing is circumferentially provided with a plurality of protrusions along the channel, and the cavities are provided in one-to-one correspondence with the protrusions; the monitoring element is attached to one end, far away from the channel, of the protrusion.

In some embodiments of the pressure monitoring mechanism, an end of the protrusion away from the channel is provided with an opening to communicate the cavity with the outside, and the monitoring element covers the opening to seal the opening.

In some embodiments of the pressure monitoring mechanism, the pressure monitoring mechanism further includes a plurality of cover plates, each cover plate presses the monitoring element against the housing one by one corresponding to each monitoring element, and is fastened to the housing to fix the monitoring element.

In some embodiments of the pressure monitoring mechanism, a concave portion matched with the monitoring element is arranged on one side of the monitoring element opposite to the protrusion, the cover plate is provided with a through hole, and the concave portion penetrates through the through hole.

In some embodiments of the pressure monitoring mechanism, a protruding ring is arranged on one side of the monitoring element, which is away from the housing, along the circumferential direction of the monitoring element, a groove matched with the protruding ring is arranged on one side of the cover plate, which is opposite to the monitoring element, the protruding ring extends into the groove, and the monitoring element can be clamped on the cover plate through the through hole and the groove.

In some embodiments of the pressure monitoring mechanism, wherein: the monitoring elements are two in number and are arranged on two opposite sides of the channel in the radial direction.

A pressure detection device comprises the pressure monitoring mechanism in the embodiment, and the pressure monitoring device further comprises a sensor, wherein the sensor detects the deformation quantity of the monitoring element to know the fluid pressure of the same cross section of the channel at different positions along the radial direction.

In some embodiments of the pressure detection apparatus, the pressure detection apparatus further includes a fixing member, the sensor is fixedly disposed on the fixing member, and the fixing member is connected to the pressure monitoring mechanism, so that the sensing surface of the sensor is attached to the monitoring element.

The embodiment of the utility model has the following beneficial effects:

the pressure monitoring mechanism is applied to the pressure detection device, so that the pressure detection device can simultaneously detect the fluid pressure on two sides of the same position, and the fluid pressure can be mutually verified, thereby improving the reliability of the pressure detection device; the pressure monitoring mechanism comprises a shell and a pressure monitoring assembly, wherein the shell is provided with an inflow port, an outflow port and a channel, the inflow port and the outflow port are communicated with the channel and are respectively connected with a pipeline, so that a path for a fluid to pass through can be formed; the pressure monitoring assembly comprises at least two monitoring elements, the monitoring elements are arranged on the shell and are arranged in the channel along the radial direction of the channel in a surrounding mode, the fluid pressure in the flowing process of the fluid in the channel can enable the monitoring elements on the two sides to deform, so that the fluid pressure of the same cross section of the channel at different positions along the radial direction can be monitored, mutual verification can be achieved, the reliability of the pressure monitoring mechanism can be improved, and the technical problem that the mode for monitoring and detecting the fluid pressure in the pipeline in the prior art is unreliable is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an exploded view of the overall structure of a pressure sensing device according to one embodiment;

FIG. 2 is a cross-sectional view of the pressure sensing device of FIG. 1 after installation;

FIG. 3 is a top view of the pressure monitoring mechanism of FIG. 1;

fig. 4 is a cross-sectional view a-a of the pressure monitoring mechanism shown in fig. 3.

Wherein: 10. a pressure monitoring mechanism; 101. a housing; 1011. an inflow port; 1012. an outflow port; 1013. a channel; 1014. a first protrusion; 10141. a first cavity; 1015. a second protrusion; 10151. a second cavity; 102. a first monitoring element; 103. a first cover plate; 104. a second monitoring element; 105. a second cover plate; 20. a first sensor; 30. a second sensor; 40. a third fixing member; 50. a first fixing member; 60. a second fixing member; 70. a pipeline.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The existing pipeline pressure detection mode generally monitors and detects the pressure of fluid in a pipeline by installing a pressure sensor on the pipeline, but the mode lacks data which can be verified mutually due to single monitoring and detected data, so that the monitoring and detected results are unreliable.

Referring to fig. 1-4, in one embodiment of a pressure monitoring mechanism 10, includes a housing 101 and a pressure monitoring assembly; the shell 101 is provided with an inflow port 1011, an outflow port 1012 and a channel 1013, the inflow port 1011 and the outflow port 1012 are respectively communicated with the channel 1013, and the inflow port 1011 and the outflow port 1012 are respectively connected with the pipeline 70;

the pressure monitoring assembly comprises at least two monitoring elements, each monitoring element is mounted to the housing 101 and circumferentially arranged around the channel 1013 in the channel 1013, and the pressure of the fluid in the channel 1013 can deform the monitoring element. Thereby enabling monitoring of the fluid pressure at different positions in the radial direction at the same cross section of the channel 1013.

In the present embodiment, the two monitoring elements may be a first monitoring element 102 and a second monitoring element 104, and preferably, the first monitoring element 102 and the second monitoring element 104 are oppositely disposed on two radial sides of the channel 1013. The fluid pressure in the fluid flowing process in the channel 1013 can deform the first monitoring element 102 and the second monitoring element 104 on two sides, so that the fluid pressures on two opposite sides can be monitored, and the fluid pressures on two opposite sides can be verified mutually, so that the reliability of the pressure monitoring mechanism 10 can be improved, and the technical problem that the mode for monitoring and detecting the fluid pressure in the pipeline in the prior art is unreliable is solved.

In a further embodiment of the above-mentioned pressure monitoring mechanism 10, the housing 101 is provided with a plurality of cavities, and the cavities are circumferentially arranged in the channel 1013 along the channel 1013 and are communicated with the channel 1013; the monitoring elements correspond to the cavities one by one and at least partially cover the cavities, so that the fluid pressure in the cavities can deform the monitoring elements relative to the cavities.

In this embodiment, the cavities include a first cavity 10141 and a second cavity 10151, the first cavity 10141 corresponds to the first monitoring element 102, the second cavity 10151 corresponds to the second monitoring element 104, preferably, the first cavity 10141 and the second cavity 10151 are oppositely disposed at two sides of the housing 101 along the radial direction of the channel 1013, by providing the first cavity 10141 and the second cavity 10151 opposite to each other on the housing 101 and communicating the first cavity 10141 with the second cavity 10151, the fluid can flow into the first cavity 10141 and the second cavity 10151, the first cavity 10141 and the second cavity 10151 can reduce the thickness of the inner wall of the housing 101, thereby reducing the monitoring errors of the first monitoring element 102 and the second monitoring element 104, and improving the accuracy of the monitoring data.

Preferably, the first cavity 10141 and the second cavity 10151 are completely open, that is, one end of the first cavity 10141 and one end of the second cavity 10151 are communicated with the channel 1013, and the other end far from the channel 1013 is communicated with the external space, the first monitoring element 102 covers the port of the first cavity 10141 far from the channel 1013, and seals the first cavity 10141, so that the fluid flowing into the first cavity 10141 can directly contact the first monitoring element 102, thereby deforming the first monitoring element 102, greatly improving the accuracy of the data monitoring of the first monitoring element 102, and eliminating the remaining interference; the second monitoring element 104 and the second cavity 10151 are also of the same structure, so that the accuracy of the fluid pressure data monitored on both sides can be improved, and the reliability can be improved.

Specifically, the first monitoring element 102 and the second monitoring element 104 may be diaphragms, such as silicone diaphragms, capable of deforming when being pressed by impact to achieve the purpose of monitoring the fluid pressure, and specifically, detecting the magnitude of the deformation amount through a pressure detection device to determine the magnitude of the fluid pressure.

In a further embodiment of the pressure monitoring mechanism 10, as shown in fig. 4, the housing 101 is provided with a plurality of protrusions circumferentially surrounding the channel 1013, and the cavities are provided in one-to-one correspondence with the protrusions; the monitoring element is engaged with an end of the projection remote from the channel 1013.

In the embodiment of the pressure monitoring mechanism 10 described above, the end of the projection remote from the channel 1013 is provided with an opening to communicate the cavity with the outside, and the monitoring element covers the opening to seal the opening.

In the above embodiment, a specific structure is provided, specifically, the protrusions include a first protrusion 1014 and a second protrusion 1015, preferably, the first protrusion 1014 and the second protrusion 1015 are disposed at two sides of the channel 1013 in the radial direction, the housing 101 may be in a cylindrical or rectangular structure, and an inflow pipe and an outflow pipe are mounted on the housing 101, and the caliber of the outflow pipe may be set smaller than that of the inflow pipe to communicate with the inflow port 1011 and the outflow port 1012 formed on the housing 101, respectively, and preferably, the inflow port 1011 and the outflow port 1012 are disposed on a straight line, so as to more smoothly flow back the fluid in the channel 1013. On opposite sides of the channel 1013 in the direction of fluid flow, such as when the housing 101 is of cylindrical configuration, the inlet 1011 and the outlet 1012 are provided on both sides of the casing 101 in the radial direction, so that the flow direction of the fluid is parallel to the radial direction of the casing 101, and a first protrusion 1014 and a second protrusion 1015 are respectively arranged on two end faces of the shell 101, preferably, the first protrusion 1014 and the second protrusion 1015 may be circular ring structures arranged along the circumference of the shell 101, thereby enabling the formation of openings, the volume of the first and second cavities 10141 and 10151 can be increased by providing the first and second protrusions 1014 and 1015, so that when the fluid enters the first cavity 10141 and the second cavity 10151, the walking path is lengthened, therefore, the problem that the fluid pressure is unstable due to the fact that the fluid impacts the cavity walls of the first cavity 10141 and the second cavity 10151 is avoided, and therefore the problem that the monitored fluid pressure is inaccurate is avoided; the additional provision of first protrusion 1014 and second protrusion 1015 allows for a height differential that facilitates first monitoring element 102 and second monitoring element 104 sealing the openings of first protrusion 1014 and second protrusion 1015 to prevent fluid from flowing out of channel 1013.

In an embodiment of the pressure monitoring mechanism 10, the pressure monitoring mechanism 10 further includes a plurality of cover plates, each cover plate corresponds to each monitoring element, and presses the monitoring element to the housing 101, and is fastened with the housing 101 to fix the monitoring element.

In the present embodiment, specifically, the cover plate includes a first cover plate 103 and a second cover plate 105, the first monitoring element 102 and the second monitoring element 104 are pressed onto the housing 101 through the first cover plate 103 and the second cover plate 105, and the first monitoring element 102 can cover the first cavity 10141, and the second monitoring element 104 can cover the second cavity 10151. The first cover plate 103 and the second cover plate 105 can also function as a seal, and the first monitoring element 102 and the second monitoring element 104 can be tightly attached to the housing 101 by pressing the first monitoring element 102 and the second monitoring element 104 against the housing 101, so that a sealing effect can be achieved.

In a further embodiment of the above pressure monitoring mechanism 10, a concave portion matching with the monitoring element is disposed on a side of the monitoring element opposite to the protrusion, the cover plate is provided with a through hole, and the concave portion is disposed through the through hole.

Specifically, in the present embodiment, the first monitoring element 102 is provided with a first recess, the first monitoring element 102 is a structure matching with the housing 101 and the first protrusion 1014, such as a circular plate structure, and the first recess is a cylindrical recess, as shown in fig. 4, the cross-sectional shape of the first recess is U-shaped, so as to match with the first protrusion 1014, and it can be understood that the first recess refers to a recess opposite to the first protrusion 1014. The first cover plate 103 is an annular structure, a circular first through hole is formed in the center of the first cover plate 103, the first concave portion extends into the first through hole, and then the first cover plate 103 presses the rest of the first monitoring element 102 against the housing 101, and can be connected with the housing 101 in a snap-fit manner, so that the first monitoring element 102 can be fixed on the housing 101. The second cover plate 105 cooperates with the second monitoring element 104 in the same way.

In an embodiment of the pressure monitoring mechanism 10, a protruding ring is arranged on one side of the monitoring element, which is away from the shell 101, along the circumferential direction of the monitoring element, a groove matched with the protruding ring is arranged on one side of the cover plate, which is opposite to the monitoring element, the protruding ring extends into the groove, and the through hole and the groove are used for clamping the monitoring element on the cover plate.

Specifically, the first convex ring is disposed on the outer edge of the first monitoring element 102, that is, the edge of the first monitoring element 102 is provided with an annular first convex ring, an annular groove matched with the shape of the first convex ring is formed on the surface of the first cover plate 103 opposite to the first monitoring element 102, that is, the annular groove is a first groove, the first convex ring can be clamped by the first groove, so that the first monitoring element 102 can be clamped on the first cover plate 103, and by the design of the first groove and the first convex ring, the sealing performance between the first cover plate 103 and the first convex ring can be further increased, and the fluid in the channel 1013 is prevented from overflowing.

The second monitoring element 104 is identical in structure to the first monitoring element 102, and the second cover plate 105 is identical in structure to the first cover plate 103. The first monitoring element 102 and the second monitoring element 104 are designed to be of the same structure, the first cover plate 103 and the second cover plate 105 are also designed to be of the same structure, the whole shell 101 can also be designed to be of a symmetrical structure with the upper side and the lower side, so that the first monitoring element 102 and the second monitoring element 104 as well as the first cover plate 103 and the second cover plate 105 are respectively symmetrically arranged on two opposite sides, the structure is the same, the installation positions are symmetrical, the fluid pressure on two sides of the same monitoring position can be monitored, the interference can be eliminated, the monitoring data of the first monitoring element 102 and the second monitoring element 104 tend to be the same, and the mutual verification effect can be achieved.

In one embodiment of the pressure monitoring mechanism 10, the aperture of the inflow port 1011 is larger than the outflow port 1012. The pressure monitoring mechanism 10 can be installed at the middle position of the pipeline 70, such as the infusion tube, the caliber of the inlet 1011 is large, the liquid can flow into the channel 1013 rapidly, the flow rate is controlled by the narrow outlet 1012, and the discomfort of the patient caused by the too fast flow rate is avoided when the injection is performed.

As shown in fig. 1 and 2, in an embodiment of the pressure detecting device, which includes the pressure monitoring mechanism 10 in the above embodiment, the pressure monitoring device further includes a sensor for detecting the deformation of the monitoring element to obtain the fluid pressures at different positions in the radial direction of the same cross section of the channel 1013.

In the present embodiment, the sensors include the first sensor 20 and the second sensor 30, and the deformation amounts of the first monitoring element 102 and the second monitoring element 104 are detected by the first sensor 20 and the second sensor 30, respectively, so that the fluid pressures on the two sides of the channel 1013 in the radial direction can be known, and the data of the fluid pressures on the two sides can be verified with each other, thereby improving the reliability of the pressure detection device.

In a specific embodiment of the pressure detection device, the sensing surface of the first sensor 20 is attached to the first monitoring element 102; the sensing surface of the second sensor 30 is attached to the second monitoring element 104.

In this embodiment, the sensing surface of the first sensor 20 is directly attached to the first monitoring element 102, and the sensing surface of the second sensor 30 is directly attached to the second monitoring element 104, and the first monitoring element 102 and the second monitoring element 104 are in a membrane structure, so that the sensing surface is attached to the membrane, and deformation can be directly sensed, thereby achieving a more accurate detection effect.

In an embodiment of the pressure detecting device, the pressure detecting device further includes a fixing member, the sensor is fixedly disposed on the fixing member, and the fixing member is connected to the pressure monitoring mechanism 10, so that the sensing surface of the sensor is attached to the monitoring element.

Specifically, the fixing member includes a first fixing member 50 and a second fixing member 60; the first sensor 20 is fixedly arranged on the first fixing piece 50; the second sensor 30 is fixedly arranged on the second fixing member 60; the first fixing member 50 is connected with the pressure monitoring mechanism 10 to make the first sensor 20 fit to the first monitoring element 102; the second fixing member 60 is connected to the pressure monitoring mechanism 10 so that the second sensor 30 is attached to the second monitoring element 104.

The first fixing member 50 is a U-shaped plate structure, an opening of the first fixing member 50 faces the first sensor 20, the first sensor 20 is accommodated in an opening area of the first fixing member 50, and the first sensor 20 and the first fixing member 50 are fixed by a fastener such as a bolt; the structure of the second fixing member 60 is the same as that of the first fixing member 50, the first sensor 20 and the second sensor 30 are pressure sensors of the same structure and type, the first fixing member 50 and the second fixing member 60 can fix the first sensor 20 and the second sensor 30 on the first fixing member 50 and the second fixing member 60, and then the first fixing member 50 and the second fixing member 60 are respectively connected with the pressure monitoring mechanism 10, preferably, the first fixing member 50 and the second fixing member 60 are also symmetrically installed, so that the first sensor 20 and the second sensor 30 can be attached to the first monitoring element 102 and the second monitoring element 104. Through the use of the first fixing member 50 and the second fixing member 60, the first sensor 20 and the second sensor 30 can be more firmly fixed, and the occurrence of movement, which causes inaccuracy of data, is prevented.

In addition, in an embodiment of the pressure detection apparatus, the fixing member further includes a third fixing member 40, the third fixing member 40 has a rectangular plate-shaped structure, an installation groove is formed in the third fixing member 40, the shape of the installation groove matches the shape of the housing 101, the housing 101 and the pressure monitoring mechanism 10 can be accommodated in the installation groove, the pipeline 70 can penetrate through the third fixing member 40, and the third fixing member 40 is fixedly connected to the first fixing member 50 and the second fixing member 60, respectively, so as to connect the pressure monitoring mechanism 10 to the first sensor 20 and the second sensor 30. In addition, a hole can be formed in the bottom of the mounting groove, and the size of the hole can be larger than the sensing surface of the sensor, so that the sensing surface can be attached to the diaphragm.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pressure monitoring mechanism, characterized by: comprises a shell and a pressure monitoring assembly;

the shell is provided with an inflow port, an outflow port and a channel, the inflow port and the outflow port are respectively communicated with the channel, and the inflow port and the outflow port are respectively connected with a pipeline;

2. The pressure monitoring mechanism of claim 1, wherein: the shell is provided with a plurality of cavities, and the cavities are circumferentially arranged on the channel along the circumferential direction of the channel and are communicated with the channel; each monitoring element corresponds to the cavity in a one-to-one mode and at least partially covers the cavity, so that fluid pressure can enable the monitoring elements to deform relative to the cavity.

3. The pressure monitoring mechanism of claim 2, wherein: the shell is provided with a plurality of bulges in a circumferential direction along the channel, and the cavities are correspondingly arranged on the bulges one by one; the monitoring element is attached to one end, far away from the channel, of the protrusion.

4. The pressure monitoring mechanism of claim 3, wherein: an opening is formed in one end, far away from the channel, of the protrusion, so that the cavity is communicated with the outside, and the monitoring element covers the opening to seal the opening.

5. The pressure monitoring mechanism of claim 4, wherein: the pressure monitoring mechanism further comprises a plurality of cover plates, each cover plate corresponds to each monitoring element one by one, the monitoring elements are pressed and attached to the shell and buckled with the shell, and therefore the monitoring elements are fixed.

6. The pressure monitoring mechanism of claim 5, wherein: the monitoring element is relative protruding one side be equipped with monitoring element assorted depressed part, the apron is equipped with the through-hole, the depressed part is worn to locate the through-hole.

7. The pressure monitoring mechanism of claim 6, wherein: the monitoring element deviates from casing one side is followed monitoring element circumference is equipped with the bulge loop, the apron is relative monitoring element one side be equipped with bulge loop assorted recess, the bulge loop stretch into in the recess, through the through-hole with the recess with can with monitoring element joint in the apron.

8. The pressure monitoring mechanism of any one of claims 1-7, wherein: the monitoring elements are two in number and are arranged on two opposite sides of the channel in the radial direction.

9. A pressure detection device, characterized in that: the pressure monitoring mechanism comprises the pressure monitoring mechanism as claimed in any one of claims 1 to 8, and the pressure monitoring mechanism further comprises a sensor, wherein the sensor detects the deformation quantity of the monitoring element to know the fluid pressure at different positions in the radial direction of the same cross section of the channel.

10. The pressure detection device of claim 9, wherein: the pressure detection device further comprises a fixing piece, the sensor is fixedly arranged on the fixing piece, and the fixing piece is connected with the pressure monitoring mechanism, so that the sensing surface of the sensor is attached to the monitoring element.