Pressure measuring device

Abstract

The utility model provides a pressure measuring device which is used for detecting the pressure of target fluid. The present invention comprises: a substrate having a substrate flow path through which a target fluid flows; the detection unit is provided with a detection end; the mounting assembly is used for connecting the detection unit to the base body and is provided with a detection cavity for inserting the detection end; the flexible film is used for separating the base body flow path from the detection cavity; in the detection process, a conducting medium is filled in the detection cavity and between the detection end and the flexible film; and the pressure of the target fluid in the base body flow path is transmitted to the detection end through the flexible film and the conducting medium, so that the detection unit obtains the pressure of the target fluid. Accordingly, the pressure of the target fluid can be detected, and mutual contamination is avoided.

Description

Technical Field

[0001] The present application relates to a pressure measuring device, and in particular, to a pressure measuring device capable of quickly and accurately detecting the pressure of a target fluid and avoiding mutual contamination. Background Art

[0002] In medical scenarios, it is often necessary to reuse pressure measuring devices to monitor the pressure of the target fluid. The devices must be simple to operate, accurate in pressure measurement, and able to meet the requirements of a medical sterile environment.

[0003] In the prior art, the pressure measuring device is usually brought into contact with the target fluid in the pipeline. Although accurate pressure measurement is possible, the risk of mutual contamination between the target fluid and the detection device is increased, and there are also troubles in subsequent cleaning and disinfection.

[0004] Therefore, in the prior art, there is a technical problem of how to detect the pressure of the target fluid and avoid mutual contamination. Utility Model Content

[0005] The purpose of the present application is to provide a pressure measuring device that can detect the pressure of a target fluid and avoid mutual contamination. In order to achieve the above purpose, one scheme of the present application is a pressure measuring device for detecting the pressure of a target fluid; comprising: a substrate, having a substrate flow path for the target fluid to flow; a detection unit, having a detection end; a mounting assembly, used to connect the detection unit to the substrate, having a detection cavity for the detection end to be inserted; a flexible membrane, used to separate the substrate flow path and the detection cavity; during the detection process, a conductive medium is filled in the detection cavity and between the detection end and the flexible membrane; the pressure of the target fluid in the substrate flow path is transmitted to the detection end via the flexible membrane and the conductive medium, so that the detection unit can obtain the pressure of the target fluid.

[0006] According to the aforementioned technical solution, the flexible membrane separates the target fluid from the detection unit, and transmits the pressure to the detection unit through the flexible membrane and the conductive medium, thereby avoiding mutual contamination between the target fluid and the detection unit and achieving aseptic pressure measurement.

[0007] In a preferred embodiment, the conductive medium is liquid.

[0008] According to the aforementioned technical solution, liquid is convenient for filling the detection cavity to transmit pressure.

[0009] In a preferred embodiment, the mounting assembly is provided with a flow guiding channel connected to the detection cavity; during the process of inserting the detection end into the detection cavity, a portion of the conductive medium is squeezed by the detection end and discharged from the detection cavity along the flow guiding channel.

[0010] According to the aforementioned technical solution, the excess conductive medium and air are discharged so that the detection unit can be smoothly inserted into the detection cavity.

[0011] In a preferred embodiment, a liquid capsule is placed in the detection cavity, and the conductive medium is stored in the liquid capsule; when the detection end is inserted into the detection cavity, the detection end squeezes the liquid capsule to allow the conductive medium to fill the detection cavity.

[0012] According to the aforementioned technical solution, the liquid capsule is placed, which reduces the trouble of injecting the conductive medium into the detection cavity.

[0013] In a preferred embodiment, the detection end is dome-shaped / spire-shaped.

[0014] According to the above technical solution, it is convenient to squeeze or puncture the liquid capsule and to discharge air and excess conductive medium better.

[0015] In a preferred embodiment, the insertion direction of the detection end is axial, and the direction perpendicular to the axial direction is radial; the mounting assembly includes a radially arranged elastic member and a locking member, one end of the elastic member is connected to the mounting assembly, and the other end is connected to the locking member, and the locking member has an axially arranged through hole; the detection unit is provided with a locking groove matching the locking member, and the locking groove is axially separated from the detection end by a specified distance; when the detection end is not inserted into the detection cavity, the through hole of the locking member is eccentrically arranged with respect to the detection cavity; in the process of inserting the detection end into the detection cavity, the detection end is first inserted into the through hole of the locking member, and the elastic member is squeezed in the radial direction to move the locking member in a direction close to the elastic member; when the locking groove reaches the through hole position of the locking member, the elastic member rebounds and resets and pushes the locking member to fit into the locking groove, thereby realizing axial fixation of the detection unit.

[0016] According to the aforementioned technical solution, the axial fixation of the detection unit can be easily achieved, and when unlocking, it is only necessary to press the locking piece, which is easy to operate.

[0017] In a preferred embodiment, the flexible film is a multi-layer film structure.

[0018] According to the aforementioned technical solution, the multi-layer membrane structure can maintain good structural strength while transmitting pressure, extend the service life, increase the safety margin, and reduce the risk of isolation failure.

[0019] In a preferred embodiment, the detection unit comprises a flow guiding sealing shaft and a flow guiding sealing member sleeved on the flow guiding sealing shaft for sealing the flow guiding channel.

[0020] According to the aforementioned technical solution, the conductive medium in the detection cavity is prevented from flowing out after sealing, so as to ensure the filling effect and further ensure the accuracy of pressure detection.

[0021] In a preferred embodiment, the detection unit is provided with a detection seal for achieving sealing between the detection unit and the detection cavity.

[0022] According to the aforementioned technical solution, the conductive medium in the detection cavity is prevented from flowing out after sealing, so as to ensure the filling effect and further ensure the accuracy of pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the present application, the drawings of the specification of the present application will be described and illustrated below. Obviously, the drawings in the following description only illustrate certain aspects of some exemplary embodiments of the present application, and it is possible for a person of ordinary skill in the art to obtain other drawings based on these drawings without creative work.

[0024] Figure 1 This is an external view of the pressure measuring device.

[0025] Figure 2 It is a transverse cross-sectional view of the pressure measuring device.

[0026] Figure 3 is a side sectional view of the pressure measuring device.

[0027] Figure 4 It is a schematic diagram of the locking mechanism.

[0028] Figure 5 It is a schematic diagram of the structure of the insertion part of the detection unit.

[0029] Caption of the attached figure:

[0030] 1 Matrix

[0031] 10 Matrix flow path

[0032] 11 First pipe connector

[0033] 111 First joint seal

[0034] 12 Second pipe connector

[0035] 121 Second joint seal

[0036] 2 Installing Components

[0037] 21 Detection chamber

[0038] 22 cyst

[0039] 24 Diversion channel

[0040] 241 guide shaft hole

[0041] 25 Mounting kit housing

[0042] 3 Detection unit

[0043] 31 Detection terminal

[0044] 311 Detection end extension

[0045] 312 Locking groove

[0046] 313 Detection chamber sealing groove

[0047] 32 Guide seal shaft

[0048] 321 flow guide seal

[0049] 33 Detecting seals

[0050] 4 Flexible membrane

[0051] 51 Elastic parts

[0052] 52 Locking piece

[0053] 521 Locking protrusion

[0054] 522 Locking hole

[0055] 61 First pipeline

[0056] 62 Second pipeline DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present application are described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present application and its application or use. The present application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present application thorough and complete and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise stated, the relative arrangement of the components and steps, numerical expressions, and numerical values, etc., described in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0058] The words “include” or “comprising” and the like used in this application mean that the elements preceding the words include the elements listed after the words, and do not exclude the possibility of also including other elements.

[0059] All terms (including technical terms or scientific terms) used in this application have the same meaning as those understood by ordinary technicians in the field to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined in this article.

[0060] Components not described in detail in this section, parameters such as specific models of components, relationships between components, and control circuits may be considered as technologies, methods, and equipment known to ordinary technicians in the relevant fields, but in appropriate circumstances, such technologies, methods, and equipment should be considered as part of the specification.

[0061] Overall structure

[0062] The following reference Figure 1 and Figure 2 The overall structure of the pressure measuring device of the present application is described. Figure 1 This is the appearance view of the pressure measuring device. Figure 2 It is a transverse cross-sectional view of the pressure measuring device.

[0063] The pressure measuring device of the present application is used to detect the pressure of the target fluid. In medical scenarios, it is often necessary to repeatedly use the pressure measuring device in a sterile environment to monitor the pressure of the target fluid. If traditional technical means are used, the detection device needs to be in contact with the target fluid, which increases the risk of contamination between the fluid and the equipment and the trouble of cleaning and disinfection.

[0064] For this purpose, see Figure 1 , Figure 2 The pressure measuring device of the present application comprises a substrate 1 capable of bearing high pressure, an installation component 2, and a detection unit 3. The substrate 1 is provided with a substrate flow path 10 for the target fluid to flow, the detection unit 3 is provided with a detection end 31, the installation component 2 is used to connect the detection unit 3 to the substrate 1, and is provided with a detection cavity 21 for inserting the detection end 31. The substrate 1 is provided with a first pipeline joint 11 and a second pipeline joint 12 for connecting an external pipeline, the substrate flow path 10 is connected to the first pipeline joint 11 and the second pipeline joint 12 respectively, and the first pipeline joint 11 and the second pipeline joint 12 are sealed and connected to the substrate flow path 10 via a first joint seal 111 and a second joint seal 121 respectively. During the detection process, the target fluid flows from the first pipeline 61 into the first pipeline joint 11 and then into the substrate flow path 10, and then enters the second pipeline 62 through the substrate flow path 10 and is transported to the outside.

[0065] Among them, a flexible membrane 4 is arranged between the mounting assembly 2 and the substrate 1 to separate the substrate flow path 10 and the detection cavity 21. As an example, the flexible membrane 4 uses elastic sensitive polymer materials or elastic metal materials to isolate and transmit pressure. Considering the difference between the target fluid and the conductive medium, corrosion-resistant diaphragms are preferably selected. In addition, the flexible membrane 4 can be implemented by a single-layer or multi-layer composite structure. When a multi-layer composite structure is adopted, the structural strength can be ensured while transmitting pressure, the service life can be extended, and the safety margin can be increased to reduce the risk of isolation failure. In actual use, the flexible membrane 4 can also be pre-fixed to a hard frame, and then the hard frame can be pasted between the detection cavity 21 and the substrate flow path 10 to facilitate the loading and unloading of the flexible membrane 4, which will not be elaborated here.

[0066] A conductive medium is filled in the detection cavity 21 between the detection end 31 and the flexible membrane 4 to transmit pressure. For example, the conductive medium is a liquid such as water, but is not limited thereto and may also be an elastic body or a solid as long as it can transmit pressure. For simplicity, the conductive medium is only described as a liquid.

[0067] In this embodiment, the matrix flow path 10 and the detection cavity 21 are both provided with openings at positions corresponding to the flexible membrane 4, so that one side of the flexible membrane 4 contacts the target fluid in the matrix flow path 10, and the other side contacts the conductive medium in the detection cavity 21. Thus, the pressure of the target fluid in the matrix flow path 10 is transmitted to the conductive medium via the flexible membrane 4, and then transmitted to the detection end 31 via the conductive medium, so that the detection unit 3 can obtain the pressure of the target fluid. It can be understood that the pressure of the target fluid described in this application can also refer to the pressure of the target fluid in a common application scenario.

[0068] In other words, the present application allows the target fluid to flow into the matrix flow path 10 in the matrix 1, and then transmits the fluid pressure via the flexible membrane 4 and the conductive medium, thereby avoiding direct contact between the detection unit 3 and the target fluid. This can not only accurately detect the pressure, but also avoid mutual contamination and achieve aseptic operation. In addition, the detection unit 3 is very convenient to disassemble and assemble, and is easy to reuse.

[0069] Installing Components

[0070] Next, combine Figure 1-3 The installation component 2 is described in detail. Figure 3 is a side sectional view of the pressure measuring device.

[0071] For the sake of convenience, the insertion and removal direction of the detection end 31 relative to the detection cavity 21 is taken as the axial direction, and the direction perpendicular to the axial direction is taken as the radial direction. In the axial direction, the detection unit 3 is inserted into the detection cavity 21 from top to bottom. In the radial direction, Figure 2 The direction from the first pipe connector 11 to the second pipe connector 12 is shown as the transverse direction. Figure 3The direction indicated by the double-headed arrows and perpendicular to both the axial direction and the transverse direction is the lateral direction. Unless otherwise specified below, the description of the direction is the same.

[0072] See also Figure 1-3 , the mounting assembly 2 is fixedly connected to the base 1. The end of the detection cavity 21 away from the base 1 is open for the detection end 31 to be inserted, and the radial cross-section of the detection cavity 21 can be cylindrical, polygonal, etc., as long as the shape and size are adapted to the insertion part of the detection unit 3. For simplicity, only the cylindrical detection cavity 21 is used as an example for description.

[0073] In this embodiment, since the space between the flexible membrane 4 and the detection end 31 needs to be filled with liquid to transmit pressure, before the detection end 31 is inserted into the detection cavity 21, a conductive medium must be injected into the detection cavity 21. However, it is difficult to quantify the amount of liquid that is filled, and during the process of inserting the detection end 31 into the detection cavity 21, the conductive medium in the detection cavity 21 is squeezed, which will also hinder the insertion of the detection end 31. For this reason, the installation component 2 is provided with Figure 3 The guide channel 24 is shown. One end of the guide channel 24 is connected to the detection chamber 21, and the other end is connected to the outside.

[0074] Thus, as the detection end 31 is inserted, a portion of the conductive medium is squeezed by the detection end 31 and discharged along the guide channel 24, and the excess air in the detection cavity 21 is also discharged along the guide channel 24. After the detection end 31 is inserted to the predetermined position, the conductive medium is filled between the detection end 31 and the flexible film 4, and the excess conductive medium has been discharged outside the detection cavity 21. Preferably, a soft plastic bag is connected to the outside of the guide channel 24, and the excess conductive medium will be collected in the soft plastic bag to ensure the cleanliness and safety of the operation process.

[0075] However, the conductive medium needs to be filled before insertion each time, which increases the trouble of operation, and the amount of filling is not easy to accurately control. Therefore, as a preferred method, a liquid capsule 22 is placed in the detection cavity 21 in advance, and the required conductive medium is stored in the liquid capsule 22. During the insertion of the detection end 31 into the detection cavity 21, the detection end 31 squeezes / punctures the liquid capsule 22 to allow the conductive medium to flow out and fill between the detection end 31 and the flexible membrane 4, and the excess conductive medium will still be discharged from the diversion channel 24 to the outside of the detection cavity 21.

[0076] In order to facilitate the bursting of the liquid capsule 22 and to better discharge the air and excess conductive medium in the detection cavity 21, the detection end 31 is preferably dome-shaped / spire-shaped. Figure 3 The device is also shown to have a detection end extension portion 311 , and the description here is made by taking the detection end 31 being dome-shaped as an example.

[0077] Through the installation component 2 of this embodiment, the detection unit 3 can be connected to the base 1 by plugging and unplugging operations, and a pressure transmission channel is established between the detection end 31 and the base flow path 10 through the detection cavity 21. The provision of the liquid capsule 22 also reduces the trouble of injecting the conductive medium each time. The structure is simple, the operation is convenient and the detection is accurate.

[0078] Locking mechanism

[0079] Next, combine Figure 1 , Figure 2 and Figure 4 , Figure 5 The locking mechanism will be described in detail. Figure 4 is a schematic diagram of the locking mechanism. Figure 5 It is a schematic structural diagram of the insertion part of the detection unit 3.

[0080] See also Figure 4 The locking mechanism comprises a radially arranged elastic member 51 and a locking member 52. One end of the elastic member 51 is connected to the mounting assembly 2, and the other end is connected to the locking member 52. The locking member 52 has a locking protrusion 521 and an axially arranged locking through hole 522.

[0081] As an example, the elastic member 51 and the locking member 52 both extend in the transverse direction, and the guide channel 24 and the guide sealing shaft 32 described later are located at the lateral positions of the mounting assembly 2 and the detection unit 3 respectively to avoid interference between the locking member 52 and the guide sealing shaft 32 .

[0082] Correspondingly, such as Figure 5 As shown, the detection unit 3 is provided with a locking groove 312 matching the locking member 52 at a position close to the detection end 31, and the locking groove 312 is axially spaced a predetermined distance from the detection end 31. Preferably, the locking groove 312 surrounds the axis of the detection unit 3, but the locking groove 312 may be provided only on one side of the detection unit 3 facing the elastic member 51, as long as the elastic member 51 can be engaged with the locking member 52 after rebounding.

[0083] When the detection end 31 is not inserted into the detection cavity 21, the locking through hole 522 of the locking member 52 is eccentrically arranged with respect to the detection cavity 21. In other words, when the elastic member 51 is in a stress-free state, the locking protrusion 521 of the locking member 52 is Figure 1 The detection end 31 extends out of the mounting assembly housing 25, and the center of the locking through hole 522 is also eccentrically arranged relative to the axis of the detection cavity 21. When the detection end 31 is inserted into the detection cavity 21, the detection end 31 is first inserted into the locking through hole 522, and presses the elastic member 51 in the lateral direction, so that the locking member 52 moves toward the direction close to the elastic member 51, and the locking protrusion 521 retracts into the detection cavity 21.

[0084] As the detection end 31 gradually goes deeper, when the locking groove 312 reaches a position flush with the locking through hole 522 in the axial direction, the elastic member 51 rebounds and pushes the locking member 52 to snap into the locking groove 312, and the locking protrusion 521 is also reset, thereby achieving axial fixation of the detection unit 3.

[0085] When it is necessary to release the fixation of the detection unit 3, the locking protrusion 521 is manually pressed to compress the elastic member 51 so that the center of the locking through hole 522 is gradually aligned with the axis of the detection cavity 21 in the horizontal direction until the locking member 52 withdraws from the locking groove 312, and then the detection unit 3 can be pulled out.

[0086] The locking mechanism of this embodiment can automatically realize axial clamping and fixing during the insertion of the detection unit 3, and when it needs to be pulled out, the locking protrusion 521 can be manually pressed. It has a simple structure and is easy to operate.

[0087] seal

[0088] Next, combine Figure 3 and Figure 5 The sealing of the detection cavity 21 and the flow guiding channel 24 will be described in detail.

[0089] See also Figure 3 and Figure 5 The portion of the detection unit 3 inserted into the detection cavity 21 is provided with a detection cavity sealing groove 313 located above the detection end 31, and the detection cavity sealing groove 313 surrounds the axis of the detection unit 3. Figure 3 The detection seal 33 shown is used to achieve sealing between the detection unit 3 and the detection cavity 21 after the detection end 31 is inserted into the detection cavity 21 .

[0090] In addition, in this embodiment, a guide shaft hole 241 thinner than the guide channel 24 is provided at the opening of the guide channel 24, and the detection unit 3 is provided with an axially extending guide sealing shaft 32 and a guide sealing member 321 sleeved on the guide sealing shaft 32. In the process of inserting the detection end 31 into the detection cavity 21, after the excess conductive medium is discharged through the guide channel 24 and the guide shaft hole 241, the guide sealing shaft 32 is inserted into the guide shaft hole 241, and the guide shaft hole 241 is sealed via the guide sealing member 321, thereby sealing the guide channel 24.

[0091] In summary, the present application separates the target fluid and the detection unit 3 by the flexible membrane 4, and transmits the pressure of the target fluid to the detection unit 3 via the flexible membrane 4 and the conductive medium, which not only realizes accurate detection of the target fluid pressure, but also avoids contamination between the target fluid and the detection unit 3, and realizes aseptic operation. The arrangement of the liquid capsule 22 and the locking mechanism further improves the convenience of detection and disassembly, and is convenient for repeated use.

[0092] It should be understood that the specific embodiments described above are only used to explain the present application, and the protection scope of the present application is not limited thereto. Any technical personnel familiar with the technical field can make changes, substitutions, and combinations within the technical scope disclosed in the present application according to the technical solution and concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A pressure measuring device for detecting the pressure of a target fluid; characterized in that: Include: A substrate having a substrate flow path for the target fluid to flow; A detection unit, having a detection terminal; A mounting assembly, used to connect the detection unit to the base, and having a detection cavity for the detection end to be inserted; A flexible membrane, used to separate the matrix flow path and the detection cavity; During the detection process, a conductive medium is filled in the detection cavity and between the detection end and the flexible membrane; the pressure of the target fluid in the matrix flow path is transmitted to the detection end via the flexible membrane and the conductive medium, so that the detection unit can obtain the pressure of the target fluid.

2. The pressure measuring device according to claim 1, characterized in that: The conductive medium is liquid.

3. The pressure measuring device according to claim 2, characterized in that: The mounting assembly is provided with a flow guide channel communicating with the detection cavity; During the process of inserting the detection end into the detection cavity, a portion of the conductive medium is squeezed by the detection end and discharged from the detection cavity along the guide channel.

4. The pressure measuring device according to claim 3, characterized in that: A liquid capsule is placed in the detection cavity, and the conductive medium is stored in the liquid capsule; During the process of inserting the detection end into the detection cavity, the detection end squeezes the liquid capsule to allow the conductive medium to fill the detection cavity.

5. The pressure measuring device according to claim 4, characterized in that: The detection end is dome-shaped / spire-shaped.

6. The pressure measuring device according to any one of claims 1 to 5, characterized in that: The insertion direction of the detection end is taken as the axial direction, and the direction perpendicular to the axial direction is taken as the radial direction; The mounting assembly comprises a radially arranged elastic member and a locking member, one end of the elastic member is connected to the mounting assembly, and the other end is connected to the locking member, and the locking member has an axially arranged through hole; The detection unit is provided with a locking groove matching the locking member, and the locking groove is spaced apart from the detection end by a specified distance in the axial direction; When the detection end is not inserted into the detection cavity, the through hole of the locking member is eccentrically arranged with respect to the detection cavity; During the process of inserting the detection end into the detection cavity, the detection end is first inserted into the through hole of the locking member, and radially squeezes the elastic member to move the locking member toward the direction close to the elastic member; when the locking groove reaches the through hole position of the locking member, the elastic member rebounds and resets and pushes the locking member to fit into the locking groove, thereby realizing axial fixation of the detection unit.

7. The pressure measuring device according to any one of claims 1 to 5, characterized in that: The flexible film is a multi-layer film structure.

8. The pressure measuring device according to any one of claims 3 to 5, characterized in that: The detection unit comprises a flow guiding sealing shaft and a flow guiding sealing member sleeved on the flow guiding sealing shaft, and is used for sealing the flow guiding channel.

9. The pressure measuring device according to any one of claims 1 to 5, characterized in that: The detection unit is provided with a detection seal for achieving sealing between the detection unit and the detection cavity.

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