CN217724242U - Pressure detection device and infusion equipment - Google Patents

Abstract

The utility model discloses a pressure detection device and an infusion device, wherein the pressure detection device comprises a base, a limiting groove is arranged on the base; the pressure sensor is arranged in the base; the pressure acquisition unit is accommodated in the limiting groove, and a pressure acquisition part of the pressure acquisition unit can be attached to the sensing surface of the pressure sensor; the cover body is covered on the opening of the limiting groove so as to fix the pressure sensor and the pressure acquisition unit in the base; wherein, the base includes the bottom plate and sets up the pedestal on the bottom plate, and the spacing groove sets up in the pedestal and deviates from one side of bottom plate, and the tank bottom of spacing groove is provided with the through-hole that runs through to the bottom plate, pressure sensor set up in the through-hole. This pressure measurement can acquire the unit to the pressure on the infusion pipe and fix, prevents that the pressure from acquiring the condition that the unit takes off from the base in, makes it to detect the liquid pressure in the infusion pipe better, guarantees the reliability of infusion equipment.

Description

Pressure detection device and infusion equipment

Cross Reference to Related Applications

The present application claims priority based on chinese patent application CN2021229643245 filed on 26/11/2021, the entire contents of which are incorporated herein by reference.

Technical Field

The utility model relates to a pressure detection technical field especially relates to a pressure detection device and infusion equipment.

Background

Infusion equipment is used for carrying or the mechanical equipment of injection liquid to the organism promptly, for the pressure of the liquid that the detection needs the infusion, is provided with pressure measurement on infusion pipe usually, but current pressure measurement is mostly split type structure, the condition of pine taking off appears easily between the spare part in the use, influences normal pressure measurement, reduces infusion equipment's reliability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure measurement and infusion equipment for solve current pressure monitoring module can't cooperate with the pressure conduction unit on the infusion pipe well, the condition that pressure conduction unit and monitoring module pine take off appears easily in the use, influence normal pressure measurement, reduce the problem of infusion equipment's reliability.

To this end, according to a first aspect, an embodiment provides a pressure detection apparatus comprising:

the base is provided with a limiting groove;

the pressure sensor is arranged in the base, and a sensing surface of the pressure sensor faces the opening direction of the limiting groove;

the pressure acquisition unit is accommodated in the limiting groove, and a pressure acquisition part of the pressure acquisition unit can be attached to the sensing surface of the pressure sensor; and

the cover body is covered on the opening of the limiting groove so as to fix the pressure sensor and the pressure acquisition unit in the base;

the base comprises a bottom plate and a base body arranged on the bottom plate, the limiting groove is formed in one side, deviating from the bottom plate, of the base body, the groove bottom of the limiting groove is provided with a mounting hole penetrating through the bottom plate, and the pressure sensor is arranged in the mounting hole.

In some embodiments of the pressure detection apparatus, the pressure obtaining unit includes a liquid inlet portion, a main body portion and a liquid outlet portion which are sequentially communicated; the limiting groove comprises a containing groove, a first clamping groove and a second clamping groove, the first clamping groove and the second clamping groove are respectively located at two ends of the containing groove and communicated with the containing groove, the containing groove is used for containing the main body part, the first clamping groove is used for containing the liquid inlet part, and the second clamping groove is used for containing the liquid outlet part.

In some embodiments of the pressure detection device, the seat body includes a mounting plate and a limiting plate disposed on the mounting plate, the mounting plate has a first side and a second side that are disposed opposite to each other, the limiting plate is annular, the inner side of the limiting plate and the first side enclose to form the accommodating groove, the first slot and the second slot are disposed on a side of the limiting plate that deviates from the first side, and the mounting hole is penetrated to the second side by the first side.

In some embodiments of the pressure detection apparatus, the pressure sensor includes a conductive portion and a strain portion, the strain portion is disposed on a side of the conductive portion away from the pressure obtaining unit, the sensing surface is disposed on the conductive portion for sensing pressure, a side of the conductive portion away from the sensing surface is in contact with the strain portion for transmitting the pressure applied to the sensing surface to the strain portion, and the strain portion is configured to output a pressure signal.

In some embodiments of the pressure detection apparatus, the mounting hole is a three-stage stepped hole, the three-stage stepped hole includes a first section, a second section and a third section, which are sequentially disposed from the first side to the second side and have gradually increasing diameters, the conductive portion is a conductive block adapted to the first section and the second section, and the strain portion is disposed in the third section.

In some embodiments of the pressure detection apparatus, the first segment is disposed adjacent to and in communication with the receiving groove, the third segment is disposed away from the receiving groove, and the second segment is disposed between and in communication with the first segment and the third segment.

In some embodiments of the pressure detection device, a groove communicated with the mounting hole is formed in one side of the seat body, which is attached to the bottom plate, and the groove and the bottom plate enclose to form a wiring channel.

In some embodiments of the pressure detection apparatus, the pressure obtaining unit includes a housing, the pressure obtaining portion is an elastic diaphragm, an inflow joint, an outflow joint and a liquid passage are provided on the housing, and the inflow joint and the outflow joint are both communicated with the liquid passage.

In some embodiments of the pressure detection device, an end of the inflow joint and/or the outflow joint away from the liquid channel is provided with a protrusion perpendicular to a flow direction of the fluid in the inflow joint or the flow direction of the fluid in the outflow joint, and an end of the first clamping groove and/or the second clamping groove away from the accommodating groove is provided with a recess matched with the protrusion.

In some embodiments of the pressure detection apparatus, the housing is provided with an opening communicating with the liquid passage, and the elastic diaphragm covers the opening.

In some embodiments of the pressure detecting apparatus, the opening of the housing is covered with a mounting cover, the mounting cover is fixedly connected to the housing, the mounting cover is provided with a mounting hole, and the pressure acquiring portion covers the mounting hole.

In some embodiments of the pressure detection device, a first clamping portion is arranged on one side, close to the liquid channel, of the installation cover, and a second clamping portion matched with the first clamping portion in clamping is arranged on one side edge, far away from the liquid channel, of the pressure acquisition portion.

According to a second aspect, an embodiment provides an infusion device comprising a pressure detection arrangement according to the first aspect of the invention.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

according to the pressure detection device and the infusion equipment in the above embodiments, the pressure detection device can fix the pressure acquisition unit through the matching of the base and the cover body, so that the whole pressure detection device is integrated, the situation that the pressure acquisition part of the pressure acquisition unit is loosened from the sensing surface of the pressure sensor in the use process is prevented, the pressure detection device can better detect the liquid pressure in the infusion catheter, the detection precision is improved, and the reliability of the infusion equipment is ensured;

meanwhile, the pressure sensor and the pressure acquisition unit are fixed in the base through the cover body, so that the pressure acquisition unit can be protected, the pressure acquisition unit is prevented from being damaged due to collision, the service life of the pressure acquisition unit is prolonged, and the detection precision and reliability of the pressure detection device are ensured;

through the tank bottom at the spacing groove set up the mounting hole that runs through the bottom plate, set up pressure sensor in the mounting hole, neither can occupy the space of spacing groove more, can be again through the mounting groove to pressure sensor air flue guard action, further guaranteed pressure measurement device's detection precision and reliability.

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 these drawings without creative efforts.

Wherein:

fig. 1 is a sectional view of a pressure detection device according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of a pressure detecting device according to an embodiment of the present invention;

fig. 3 is a schematic view of a part of a pressure detection device according to an embodiment of the present invention;

FIG. 4 is an exploded view of FIG. 2;

fig. 5 is a schematic structural diagram of a pressure obtaining unit in the pressure detecting device according to an embodiment of the present invention.

Description of the main element symbols:

100-a base; 101-a limiting groove; 1011-a receiving groove; 1012-first card slot; 1013-a second card slot; 102-routing channels; 110-a base plate; 120-seat body; 121-a mounting plate; 1211-mounting holes; 12111-first section; 12112-second section; 12113-third stage; 1212-grooves; 122-a limiting plate;

200-a pressure sensor; 210-a conductive portion; 220-a strain section;

300-a cover body;

400-a pressure acquisition unit; 410-a housing; 4101-a liquid channel; 411-inflow connection; 412-an outflow connector; 420-a pressure acquisition section; 430-a boss; 431-a recess; 4311-clamping groove; 432-a first snap-in part; 433-a second clamping part; 434-a first groove; 435-a second groove; 461-mounting cover; 4611-through hole.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention 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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the utility model provides a pressure detection device for liquid pressure to in the transfer line detects.

In one embodiment, as shown in fig. 1 to 5, the pressure detecting apparatus includes a base 100, a pressure sensor 200, a pressure acquiring unit 400, and a cover 300.

The base 100 is provided with a limiting groove 101.

Specifically, the shape of the limiting groove 101 is adapted to the shape of the pressure acquisition unit 400, so that the pressure acquisition unit 400 can be accommodated in the limiting groove 101.

The pressure sensor 200 is disposed in the base 100, and a sensing surface of the pressure sensor 200 faces an opening direction of the limiting groove 101.

The pressure acquisition unit 400 can be housed in the stopper groove 101, and the pressure acquisition portion 420 of the pressure acquisition unit 400 can be bonded to the sensing surface of the pressure sensor 200.

Specifically, the type of the pressure sensor 200 may be a strain type, a piezoresistive type, a capacitive type, an inductive type, or the like, as long as the pressure sensor can sense the pressure signal of the pressure acquisition part 420 of the pressure acquisition unit 400. The pressure sensor 200 is also used to convert the pressure signal into an electrical signal that can be output.

The cover 300 covers the opening of the stopper groove 101 to fix the pressure acquisition unit 400 and the pressure sensor 200 in the base 100.

Specifically, the cover 300 and the base 100 may be connected by a snap connection, a screw connection, an adhesive connection, or the like, so as to fix the pressure obtaining unit 400 in the base 100.

In the embodiment of the present invention, the pressure detecting device can fix the pressure obtaining unit 400 through the base 100 and the cover 300, so that the whole pressure detecting device becomes a whole, thereby preventing the pressure obtaining unit 400 from loosening to cause the poor adhesion between the pressure obtaining part 420 and the sensing surface of the pressure sensor 200 during the use process, and ensuring the accuracy and reliability of pressure monitoring;

meanwhile, the cover 300 fixes the pressure sensor 200 and the pressure obtaining unit 400 in the base 100, so that the pressure obtaining unit 400 can be protected, the pressure obtaining unit 400 is prevented from being damaged due to collision, and the service life of the pressure obtaining unit 400 is prolonged.

In a specific embodiment, as shown in fig. 1 to 3, the position-limiting groove 101 includes a receiving groove 1011 and a first engaging groove 1012 and a second engaging groove 1013 respectively located at two ends of the receiving groove 1011 and communicating with the receiving groove 1011, and the opening directions of the receiving groove 1011, the first engaging groove 1012 and the second engaging groove 1013 are the same.

It can be understood that, since the pressure obtaining unit 400 is required to be disposed on the infusion tube, the pressure obtaining unit 400 is necessarily provided with a liquid inlet portion and a liquid outlet portion communicating with the infusion tube. Therefore, the position-limiting groove 101 is designed to include the receiving groove 1011, the first locking groove 1012 and the second locking groove 1013. The receiving groove 1011 is used for receiving the main body portion, the first engaging groove 1012 is used for receiving the liquid inlet portion, and the second engaging groove 1013 is used for receiving the liquid outlet portion. Specifically, the main body of the pressure obtaining unit 400 is located in the receiving groove 1011, and the liquid inlet portion and the liquid outlet portion of the pressure obtaining unit 400 are respectively located in the first clamping groove 1012 and the second clamping groove 1013, so that the matching between the limiting groove 101 and the pressure obtaining unit 400 is realized, and the pressure obtaining unit 400 can be fixed in the limiting groove 101 after the cover 300 is closed.

In a specific embodiment, as shown in fig. 1-3, the base 100 includes a bottom plate 110 and a base body 120 disposed on the bottom plate 110, the limiting groove 101 is disposed on a side of the base body 120 away from the bottom plate 110, a mounting hole 1211 penetrating through the bottom plate 110 is disposed on a bottom of the limiting groove 101, and the pressure sensor 200 is disposed in the mounting hole 1211.

Specifically, the seat body 120 may be formed by machining (e.g., milling), or may be integrally formed by injection molding, and of course, may also be formed by assembling the annular limiting plate 122 and the mounting plate 121 in the following embodiments. The base plate 110 and the base body 120 can be combined by screw connection, adhesive connection, welding, and fastening connection to form the base 100.

By arranging the base 100 as two parts of the seat body 120 and the bottom plate 110, a space for installing the pressure sensor 200 is formed by the cooperation of the bottom plate 110 and the installation hole 1211, and the pressure sensor 200 is installed in the installation hole 1211 and extends into the limiting groove 101, so that the pressure sensor 200 can be protected by the installation groove without occupying too much space of the limiting groove 101.

In a more specific embodiment, as shown in fig. 1 to 4, the seat body 120 includes a mounting plate 121 and a limiting plate 122 disposed on the mounting plate 121, the mounting plate 121 has a first side and a second side opposite to each other, the limiting plate 122 is ring-shaped, an inner side of the limiting plate 122 and the first side enclose to form a receiving groove 1011, a first engaging groove 1012 and a second engaging groove 1013 are disposed on a side of the limiting plate 122 departing from the first side, and the mounting hole 1211 penetrates from the first side to the second side.

It is understood that the first side of the mounting plate 121, i.e., the side of the mounting plate 121 attached to the limiting plate 122 in the drawing, and the second side of the mounting plate 121, i.e., the side of the mounting plate 121 attached to the bottom plate 110 in the drawing.

Specifically, the fastening plate 122 and the mounting plate 121 can be combined by a screw connection, an adhesive connection, a welding connection, a snap connection, and the like to form the seat body 120.

Through forming the seat body 120 by assembling the annular limiting plate 122 and the mounting plate 121, the inner side of the limiting plate 122 and the first side of the mounting plate 121 enclose the accommodating groove 1011 after combination, the accommodating groove 1011 is formed simply and conveniently, and only the parts are required to be produced and then simply assembled.

In some embodiments, as shown in fig. 1 and fig. 4 to 5, the pressure sensor 200 includes a conductive portion 210 and a strain portion 220, the strain portion 220 is disposed on a side of the conductive portion 210 away from the pressure obtaining unit 400, a sensing surface is disposed on the conductive portion 210 for sensing pressure, a side of the conductive portion 210 away from the sensing surface is in contact with the strain portion 220 to conduct the pressure applied to the sensing surface to the strain portion 220, and the strain portion 220 is used for outputting a pressure signal.

The mounting hole 1211 is a three-step hole including a first section 12111, a second section 12112, and a third section 12113, which are sequentially disposed from the first side to the second side and have gradually increasing hole diameters, the conductive portion 210 is a conductive block adapted to the first section 12111 and the second section 12112, and the strain portion 220 is disposed in the third section 12113. The first section is arranged adjacent to and communicated with the accommodating groove, the third section is arranged far away from the accommodating groove, and the second section is arranged between the first section and the third section and communicated with the first section and the third section.

During assembly, the conductive block is firstly installed into the first section 12111 and the second section 12112 of the three-stage stepped hole from the second side, the strain part 220 is then installed into the third section 12113 of the three-stage stepped hole from the second side and is contacted with the conductive block, and finally the bottom plate 110 is fixed on the second side of the mounting plate 121, because the inner diameter of the first section 12111 is smaller than that of the second section 12112, the conductive block cannot be separated from the first section 12111, because the bottom plate 110 is fixed on the second side of the mounting plate 121, the strain part 220 cannot be separated from the third section 12113, and the pressure sensor 200 can be well fixed in the mounting hole 1211 by the design of the three-stage stepped hole and the bottom plate 110.

In some more specific embodiments, as shown in fig. 1 to 4, a groove 1212 communicating with the mounting hole 1211 is disposed on a side of the base 120 attached to the bottom plate 110, and the groove 1212 and the bottom plate 110 enclose to form the routing channel 102.

By providing the groove 1212 communicating with the mounting hole 1211 on the base 120, after the base 120 and the bottom plate 110 are fixed, the groove 1212 and the bottom plate 110 can enclose the routing channel 102 for passing the cable on the pressure sensor 200. This manner is simpler and more convenient than the manner in which the wiring hole is formed by drilling on the body 120.

In a specific embodiment, as shown in fig. 1 and 5, the pressure obtaining unit 400 includes a housing 410, a pressure obtaining portion 420 is an elastic membrane, the housing 410 is provided with an inflow connector 411, an outflow connector 412 and a liquid channel 4101, the inflow connector 411 and the outflow connector 412 are both communicated with the liquid channel 4101, and the inflow connector 411 and the outflow connector 412 are respectively used for connecting infusion catheters; the elastic diaphragm is disposed on the housing 410 and attached to the sensing surface of the pressure sensor 200, and the elastic diaphragm is deformed by the pressure of the liquid in the liquid passage 4101.

Specifically, the housing 410 is provided with an opening communicating with the liquid passage 4101, and the elastic diaphragm covers the opening.

In a specific embodiment, as shown in fig. 1 and 5, an opening of the housing 410 is covered with a mounting cover 461, the mounting cover 461 is fixedly connected with the housing, a through hole 4611 is formed on the mounting cover 461, and the pressure obtaining portion 420 covers the through hole 4611.

Specifically, a first engaging portion 432 is provided on the side of the mounting cover 461 close to the liquid passage 4101, and a second engaging portion 433 is provided on the side of the pressure acquiring portion 420 remote from the liquid passage 4101 to engage with the first engaging portion 432. The first engaging portion 432 is disposed near the through hole 4611 and surrounds the through hole 4611. In one embodiment, a first groove 434 is formed on one side surface of the mounting cover 461, which is close to the liquid passage 4101, the first groove 434 is disposed around the through hole 4611, and the first groove 434 serves as the first clamping portion 432; a side surface of the elastic membrane away from the liquid passage 4101 is provided with a second groove 435, the second groove 435 is disposed on a periphery of the elastic membrane, and the second groove 435 serves as a second clamping portion 433. The side wall of the second groove 435 away from the center of the elastic membrane extends into the first groove 434, and the side wall of the first groove 434 close to the center of the through hole 4611 extends into the second groove 435, so that the first clamping portion 432 and the second clamping portion 433 can be clamped in a matching manner. Through the fixed connection of first joint portion 432 and second joint portion 433, can realize the fixed connection with elastic diaphragm and casing 410. In other alternative embodiments, the fixed connection of the elastic diaphragm to the housing 410 may be achieved in other ways. For example, a snap connection, a screw connection, an adhesive connection, etc. may be implemented by other structures to secure the elastic diaphragm within the housing 410.

It can be understood that when the detection device is used for detecting the hydraulic pressure in the infusion catheter, the detection device is connected in series on the infusion catheter, the pressure of the liquid in the infusion catheter can enable the elastic diaphragm to arch outwards, the deformation of the elastic diaphragm is transmitted to the strain part 220 through the conduction part 210, and the strain part 220 converts the deformation of the elastic diaphragm into an electric signal and outputs the electric signal outwards.

In one embodiment, as shown in fig. 2-5, the end of the inflow connector 411 and/or the outflow connector 412 of the housing 410 away from the liquid channel 4101 is provided with a protrusion 430, and the end of the first card slot 1012 and/or the second card slot 1013 away from the receiving slot 1011 is provided with a recess 431 matching with the protrusion 430. Wherein the recess 431 is in communication with the first card slot 1012. Through the matching and clamping of the convex part 430 and the concave part 431, the pressure acquisition unit 400 can be prevented from shaking back and forth along the setting direction of the first clamping groove 1012, the accommodating groove 1011 and the second clamping groove 1013, the detection result of the pressure acquisition unit 400 is prevented from being affected, and the detection precision and reliability of the pressure detection device are improved.

Specifically, a portion of the inflow joint 411 of the pressure acquisition unit 400 distant from the liquid passage 4101 extends in a direction perpendicular to the liquid flow direction to form the convex portion 431. The portion of the first locking groove 1012 away from the receiving groove 1011 forms a locking groove 4311, the locking groove 4311 serves as the recess 431, and the locking groove 4311 is used for locking the protrusion 430 on the inflow connector 411. In another embodiment, the fastening groove 4311 may also be disposed at a middle position of the first fastening groove 1012 and/or a position close to the receiving groove 1011, and the fastening groove 4311 and the receiving groove 1011 are disposed at an interval. The setting position of the specific protruding portion 430 matches with the setting position of the clamping groove 4311.

The width of the card slot 4311 is greater than the width of the first card slot 1012. The width direction of the card slot 4311 is the same as the width direction of the first card slot 1012 and is perpendicular to the arrangement direction of the first card slot 1012. In another alternative embodiment, the portion of the outflow joint 412 of the pressure obtaining unit 400 away from the liquid passage 4101 extends in a direction perpendicular to the liquid flow direction to form the convex portion 431. The end of the second locking groove 1013 away from the receiving groove 1011 serves as a locking groove 4311. The width of the locking groove 4311 is greater than the width of the second locking groove 1013. The width direction of the engaging groove 4311 is the same as the width direction of the second engaging groove 1013, and is perpendicular to the arrangement direction of the second engaging groove 1013.

Further, the central axis of the clamping groove 4311 coincides with the central axis of the first clamping groove 1012 and the central axis of the second clamping groove 1013. The bottom of the clamping groove 4311 is coplanar with the bottoms of the first and second clamping grooves 1012, 1013. The shape and size of the protruding portion 430 are matched with the shape and size of the clamping groove 4311, so that the protruding portion 430 is conveniently clamped with the clamping groove 4311, the position of the pressure acquisition unit 400 and the position of the base 100 are relatively fixed, the influence on the measurement accuracy of the pressure detection device is avoided, and the reliability of the detection result is improved.

The embodiment of the utility model provides an infusion equipment is still provided for carry or injection liquid, like medical syringe, act on the purpose that infusion pipe reaches control infusion speed through the pump, be commonly used for the condition that needs strict control infusion volume and dose, if be applied to injection contrast medium, the medicine that steps up, anti arrhythmia medicine, infant venous transfusion or intravenous anesthesia etc.. The infusion device comprises the pressure detection means in the above described embodiments. By using the pressure detection device, the infusion device can accurately and reliably detect the pressure of the infusion liquid, and the safety and stability of infusion are ensured.

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 are merely illustrative of several embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (13)

1. Pressure detection device, its characterized in that includes:

the base is provided with a limiting groove;

the pressure sensor is arranged in the base, and the sensing surface of the pressure sensor faces the opening direction of the limiting groove;

the pressure acquisition unit is accommodated in the limiting groove, and a pressure acquisition part of the pressure acquisition unit can be attached to the sensing surface of the pressure sensor; and

the cover body is covered on the opening of the limiting groove so as to fix the pressure sensor and the pressure acquisition unit in the base;

wherein, the base include the bottom plate with set up in pedestal on the bottom plate, the spacing groove set up in the pedestal deviates from one side of bottom plate, the tank bottom of spacing groove be provided with run through to the mounting hole of bottom plate, pressure sensor set up in the mounting hole.

2. The pressure detection device according to claim 1, wherein the pressure acquisition unit comprises a liquid inlet part, a main body part and a liquid outlet part which are communicated in sequence; the limiting groove comprises a containing groove and a first clamping groove and a second clamping groove, the first clamping groove and the second clamping groove are respectively located at two ends of the containing groove and are communicated with the containing groove, the containing groove is used for containing the main body part, the first clamping groove is used for containing the liquid inlet part, and the second clamping groove is used for containing the liquid outlet part.

3. The pressure detection device of claim 2, wherein the seat body comprises a mounting plate and a limiting plate arranged on the mounting plate, the mounting plate has a first side and a second side which are opposite to each other, the limiting plate is annular, the inner side of the limiting plate and the first side enclose the accommodating groove, the first clamping groove and the second clamping groove are arranged on the surface of the limiting plate, which is away from the first side, and the mounting hole is formed by penetrating from the first side to the second side.

4. The pressure detecting device according to claim 3, wherein the pressure sensor includes a conducting portion and a strain portion, the strain portion is disposed on a side of the conducting portion away from the pressure obtaining unit, the sensing surface is disposed on the conducting portion for sensing pressure, a side of the conducting portion away from the sensing surface contacts the strain portion to conduct pressure applied to the sensing surface to the strain portion, and the strain portion is configured to output a pressure signal.

5. The pressure detection device of claim 4, wherein the mounting hole is a three-stage stepped hole, the three-stage stepped hole comprises a first section, a second section and a third section, the first section, the second section and the third section are sequentially arranged from the first side to the second side, the hole diameter of the first section is gradually increased, the conduction portion is a conduction block matched with the first section and the second section, and the strain portion is arranged in the third section.

6. The pressure detection device of claim 5, wherein the first segment is disposed adjacent to and in communication with the receiving slot, the third segment is disposed away from the receiving slot, and the second segment is disposed between and in communication with the first segment and the third segment.

7. The pressure detecting device according to any one of claims 3 to 6, wherein a groove communicating with the mounting hole is disposed on one side of the base body attached to the bottom plate, and the groove and the bottom plate enclose to form a wiring channel.

8. The pressure detection apparatus according to any one of claims 2 to 6,

the pressure acquisition unit comprises a shell, the pressure acquisition part is an elastic membrane, an inflow joint, an outflow joint and a liquid channel are arranged on the shell, and the inflow joint and the outflow joint are communicated with the liquid channel.

9. The pressure detection device according to claim 8, wherein an end of the inflow connector and/or the outflow connector, which is away from the liquid channel, is provided with a protrusion perpendicular to a flow direction of the fluid in the inflow connector or the flow direction of the fluid in the outflow connector, and an end of the first locking groove and/or the second locking groove, which is away from the receiving groove, is provided with a recess matched with the protrusion.

10. The pressure detection apparatus of claim 8, wherein the housing is provided with an opening communicating with the liquid passage, and the elastic diaphragm covers the opening.

11. The pressure detecting device of claim 10, wherein the opening of the housing is covered with a mounting cover, the mounting cover is fixedly connected to the housing, the mounting cover is provided with a mounting hole, and the pressure obtaining portion covers the mounting hole.

12. The pressure detection device of claim 11, wherein a first clamping portion is disposed on one side of the mounting cover close to the liquid channel, and a second clamping portion matched with the first clamping portion is disposed on an edge of one side of the pressure acquisition portion away from the liquid channel.

13. Infusion device, characterized in that it comprises a pressure detection device according to any of claims 1-12.

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