CN218600748U - Pressure detection device and detection system - Google Patents

Abstract

The application relates to the field of pressure detection and discloses a pressure detection device, which comprises: the cylinder body is provided with a cavity and further comprises a first connecting port, and the first connecting port is used for being connected with a container to be detected; the movable component is arranged in the cavity of the barrel and is in contact with the cavity wall of the cavity, the cavity is separated into a first containing cavity and a second containing cavity by the movable component, and the movable component is driven to move towards the second containing cavity when the fluid pressure of the first containing cavity is greater than the fluid pressure of the second containing cavity; the plurality of detection needles are arranged in the second containing cavity, the distances from the plurality of detection needles to the movable component are different, and the plurality of detection needles are used for detecting different pressures. The pressure detection device has the advantages of low manufacturing cost, simple structure, easy maintenance and wide application range.

Description

Pressure detection device and detection system

Technical Field

The application relates to the field of pressure detection, in particular to a pressure detection device and a detection system.

Background

At present, in order to prevent the closed container from being dangerous due to the abnormal pressure, a pressure sensor is generally used to detect the abnormal pressure. The commonly used pressure sensor has high use cost, and when the pressure sensor is used in a closed space of corrosive or polluted gas, special adaptation is needed, so that the cost of enterprise control is not facilitated, and the popularization is also not facilitated. For some containers that do not require high precision pressure detection, only a sensor is needed to monitor pressure anomalies, and therefore, a device with a simple structure, easy maintenance, and low cost needs to be designed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The application provides a pressure detection device and a detection system, the pressure detection device is simple in structure, easy to maintain and low in manufacturing cost, and high cost of using a traditional sensor in pressure anomaly monitoring is reduced.

In a first aspect, the present application provides a pressure detection apparatus, comprising: the container detection device comprises a barrel, a detection device and a control device, wherein the barrel is provided with a cavity and further comprises a first connecting port which is used for being connected with a container to be detected; the movable component is arranged in a cavity of the barrel and is in contact with the cavity wall of the cavity, the cavity is divided into a first containing cavity and a second containing cavity by the movable component, and when the fluid pressure of the first containing cavity is greater than the fluid pressure of the second containing cavity, the movable component is driven to move towards the second containing cavity; a plurality of probe needles disposed in the second chamber, the plurality of probe needles having different distances from the movable member, the plurality of probe needles being configured to detect different pressures.

In a second aspect, the present application further provides a detection system, which includes a container to be detected and the pressure detection device described in any one of the embodiments of the present application, where the first connection port is connected to the container to be detected.

The application provides a pressure detection device, this pressure detection device includes: the cylinder body is provided with a cavity and further comprises a first connecting port, and the first connecting port is used for being connected with a container to be detected; the movable component is arranged in the cavity of the barrel and is in contact with the cavity wall of the cavity, the cavity is separated into a first containing cavity and a second containing cavity by the movable component, and the movable component is driven to move towards the second containing cavity when the fluid pressure of the first containing cavity is greater than the fluid pressure of the second containing cavity; the plurality of detection needles are arranged in the second containing cavity, the distances from the plurality of detection needles to the movable component are different, and the plurality of detection needles are used for detecting different pressures. The pressure detection device has the advantages of low manufacturing cost, simple structure, easy maintenance and wide application range.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pressure detection apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a movable component according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a pressure detection apparatus according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a detection circuit according to an embodiment of the present application;

FIG. 5 is a schematic view of a seal cap according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a detection system according to an embodiment of the present application.

Main part numbers and descriptions:

1. a detection system; 10. a pressure detection device; 11. a container to be tested;

111. a detection port; 100. a barrel; 101. a movable member; 102. a probe pin; 103. a sealing cover;

1000. a cavity; 1001. a first connection port; 1002. a second connection port; 1003. a first cavity; 1004. A second cavity; 1011. a first side surface; 1012. a second side surface; 1021. a first probing pair; 1022. The second probe is aimed at.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

For solving the problem that traditional pressure sensor is with high costs and difficult popularization, the embodiment of the application provides a pressure detection device and monitoring system, and this pressure detection device simple structure, easy to maintain, low in manufacturing cost.

For ease of understanding, the embodiment of the present application will be described below with reference to a schematic structural diagram of the pressure detection apparatus 10.

As shown in fig. 1, an embodiment of the present application provides a pressure detection apparatus 10, where the pressure detection apparatus 10 includes: a cylinder 100, a movable member 101, and a plurality of probe pins 102.

The cartridge 100 comprises a chamber 1000 and a first connector 1001, the first connector 1001 being adapted to be connected to a container to be tested.

The movable component 101 is installed in the chamber 1000 of the barrel 100 and is in contact with the chamber wall of the chamber 1000, the chamber 1000 is separated into a first chamber 1003 and a second chamber 1004 by the movable component 101, and when the fluid pressure in the first chamber 1003 is greater than the fluid pressure in the second chamber 1004, the movable component 101 is driven to move towards the second chamber 1004.

The plurality of detection needles 102 are arranged in the second cavity 1004, the distances from the movable part 101 to the plurality of detection needles 102 are different, and the plurality of detection needles 102 are used for detecting different pressures.

In some embodiments, the first connection port 1001 has a thread structure for connecting with a container to be tested, and the stability and sealing performance of the connection between the pressure testing device 10 and the container to be tested can be improved by the thread structure. In addition to the screw structure, the first connection port 1001 has an existing connection structure to ensure stable connection of the pressure detection apparatus 10 and the container to be detected.

In some embodiments, the cartridge 100 may comprise one of a rectangular cartridge, a cylindrical cartridge, a prismatic cartridge, and a square cartridge.

In some embodiments, the movable member 101 may comprise a piston, the piston is mounted in the cavity 1000 of the cylinder 100, the cavity 1000 is separated into a first cavity 1003 and a second cavity 1004, and the piston is tightly connected with the cavity wall of the cavity 1000. When there is a pressure difference across the piston, the piston slides on the wall of the chamber 1000 in the direction of the pressure when subjected to the fluid pressure, for example to drive the movable part 101 towards the second chamber 1004 when the fluid pressure in the first chamber 1003 is greater than the fluid pressure in the second chamber 1004.

In some embodiments, the first cavity 1003 is an open cavity, and the first cavity 1003 is connected to the container to be detected through the first connection port 1001, after the connection, the fluid pressure in the first cavity 1003 is equal to the fluid pressure in the container to be detected.

In some embodiments, the second chamber 1004 is a sealed chamber formed by the movable member 101 and the barrel 100, and the second chamber 1004 contains a fluid to be detected, which includes air and a fluid in a container to be detected. The second cavity 1004 is filled with fluid to push the moveable member 101 to an initial position to provide a reference fluid pressure to the moveable member 101.

In some embodiments, the second cavity 1004 is not filled with fluid, and the pressure detection device 10 further comprises an elastic member comprising a spring mounted in the second cavity 1000, the spring being connected to the movable member 101 and the cylinder 100. The pressure detection device 10 supplies the reference fluid pressure to the movable member 101 through a spring.

It should be noted that the fluid in the embodiments of the present application includes gas and liquid.

In some embodiments, the movable member 101 is capable of conducting current.

For example, referring to fig. 2, fig. 2 illustrates a movable member 101. As shown in fig. 2, the movable member 101 includes a first side 1011 and a second side 1012. The first side surface 1011 is in the first cavity 1003, and when the fluid in the container to be detected is a corrosive fluid, the first side surface 1011 is made of a corrosion-resistant material. The second side 1012 within the second cavity 1004 has a conductive metallization on which current can be conducted, the second side 1012 being adapted to form an electrically conductive loop when in contact with the probe pin 102.

For example, the movable member 101 may be a conductor. In order to improve the corrosion resistance, one side of the movable part 101 in the first receiving cavity 1003 is coated with a corrosion-resistant material.

In other embodiments, the second side 1012 may be made of a conductive metal, and the second side 1012 may further include a conductive contact and a buried circuit to achieve conduction current.

In some embodiments, the pressure detection apparatus 10 includes a plurality of probe needles 102, and the probe needles 102 may be retractable metal stylus needles. The probe pins 102 have a conductive function, and taking a probe pair composed of two probe pins 102 as an example, when two probe pins 102 in the probe pair contact a metal conductive layer on the movable member 101, the probe pair and the metal conductive layer constitute an electrical circuit, and if the probe pair is connected to an electrode, a current can flow from one probe pin 102 to the other probe pin 102.

In some embodiments, a plurality of probe pins 102 are provided in the pressure detection apparatus 10, wherein two probe pins 102 constitute probe pairs, each probe pair has a different length, the movable component 101 contacts with a different probe pair at a different position, and each probe pair is connected to a different electrical signal, so as to prompt abnormal pressure conditions with a plurality of different pressure values.

In some embodiments, to increase the contact area of the probe 102 with the movable member 101, the needle portion of the probe 102 may be bent by a predetermined angle, such as 90 °.

In one embodiment, the movable component 101 is grounded, and the detection needle 102 is connected with a protection resistor and a positive electrode of a power supply, so that an electrified loop can be formed when the single detection needle 102 is in contact with the movable component 101, and abnormal pressure indication can be realized through the single detection needle 102.

For further understanding, referring to FIG. 3, FIG. 3 illustrates a pressure sensing device 10. As shown, the pressure detection apparatus 10 includes: a cylinder 100, a movable member 101, a plurality of probe pins 102, and a sealing cap 103.

The cartridge 100 comprises a cavity 1000, a first connector 1001 and a second connector 1002, wherein the first connector 1001 is used for connecting with a container to be detected, and the second connector 1002 is used for installing the sealing cover 103.

The movable component 101 is installed in the chamber 1000 of the barrel 100 and is in contact with the chamber wall of the chamber 1000, the chamber 1000 is separated into a first chamber 1003 and a second chamber 1004 by the movable component 101, and when the fluid pressure in the first chamber 1003 is greater than the fluid pressure in the second chamber 1004, the movable component 101 is driven to move towards the second chamber 1004.

A plurality of probe needles 102, the plurality of probe needles 102 being disposed in the second cavity 1004, in particular, on the sealing cap 103, the plurality of probe needles 102 being at different distances from the movable member 101, the plurality of probe needles 102 being for detecting different pressures.

The sealing cover 103 comprises at least one detection circuit comprising a detection pair, which when contacting the movable part 101 is switched on for enabling an output pressure indication.

Referring to fig. 4, fig. 4 shows a schematic structural diagram of a detection circuit. The detection circuit comprises a first detection pair 1021, a second detection pair 1022, a protection resistor R1 and a protection resistor R2. Wherein the protective resistor R1 and the protective resistor R2 may be disposed in the sealing cover 103; the first detection pair 1021 and the second detection pair 1022 may be disposed outside the sealing cover 103.

In some embodiments, the sealing cap 103 comprises a rubber cap, a metal cap, and a plastic cap, and the sealing cap 103 is used to seal the second connection port 1002 to prevent fluid in the second cavity 1004 from leaking.

Referring to fig. 5, fig. 5 shows a schematic structural diagram of the sealing cover 103. The sealing cover 103 comprises a first detection pair 1021 and a second detection pair 1022, wherein the first detection pair 1021 extends out of the cover body by 1/2L, and the second detection pair 1022 extends out of the cover body by 1/3L.

In some embodiments, to increase the accuracy of detection, multiple sets of probe pairs of different lengths may be provided.

In some embodiments, to make the overall device more compact, the probe pin 102 comprises a stylus with a variable resistance value, the magnitude of which is proportional to the current length of the stylus. When a direct-current power supply is connected to the probe 102, the abnormal prompts of various pressures can be obtained only by detecting the current change in the related circuits, so that one probe 102 can complete the monitoring of the abnormal conditions of various pressures.

In some embodiments, the detection circuit comprises a protection resistor and a plurality of electrical signal interfaces, the signal interfaces comprise a signal input interface and a signal output interface, and the protection resistor is used for preventing the detection circuit from being burnt due to short circuit caused by excessive current. The electrical signal interface is used for accessing an external electrical signal, for example, in any group of probe pin pairs, a signal input interface corresponding to one probe pin 102 is accessed to a 5V positive electrode signal, a signal output interface corresponding to the other probe pin 102 is accessed to an external detection device, and the external detection device can judge whether the pressure in the container to be detected is abnormal according to the existence of current in the signal output interface.

In some embodiments, the detection circuit further comprises LED lamps and a power supply, the detection pairs are connected with the LED lamps, one LED lamp is configured for each detection pair, the power supply is configured to provide current to the detection circuit comprising the LED lamps, so that when the detection pair is in contact with the movable part 101, the detection pair is energized to emit light for the corresponding LED lamp, and the LED lamps are used for prompting a user that a pressure anomaly exists in the container to be detected.

In some embodiments, different length detection is directed to configuring different color LED lights so that multiple pressure anomalies can be reflected by the different color LED lights, e.g., a yellow LED light indicating a pressure above normal and a red LED light indicating a pressure above alarm.

In one embodiment, please refer to fig. 3 and 5. The pressure detection device 10 comprises a first detection pair 1021 and a second detection pair 1022, wherein the first detection pair 1021 extends into the second cavity 1004 for a depth of 1/2L, and the second detection pair 1022 extends into the second cavity 1004 for a length of 1/3L. When the air pressure value in the first cavity 1003 is the standard inspection value of the container to be retrieved, the second cavity 1004 is filled with the gas to be detected in the container to be detected, after the gas is filled, the distance between the movable component 101 and the second connecting port 1002 is L, and the air pressure value in the second cavity 1004 is the standard inspection value of the container to be retrieved. The first connection port 1001 is connected with the container to be detected, if the air pressure value in the container to be detected is larger than the air pressure value in the second containing cavity 1004, the movable component 101 moves towards the sealing cover 103 under the action of the fluid pressure of the container to be detected, the volume of the second containing cavity 1004 is reduced, and the movable component 101 stops moving until the pressure value in the second containing cavity 1004 is equal to the pressure value in the container to be detected. When the pressure value in the container to be detected is 2 times of the pressure value in the second accommodating cavity 1004, the volume of the second accommodating cavity 1004 is compressed to be half of the initial value, the distance from the movable part 101 to the second connecting port 1002 is 1/2L, the movable part 101 is in contact with the first detection pair 1021, and the first detection pair 1021 is conducted to the detection circuit corresponding to the 1021, so as to prompt that the air pressure value in the container to be detected is 2 times of the detection standard value. When the pressure value in the container to be detected is 3 times of the pressure value in the second cavity 1004, the volume of the second cavity 1004 is compressed to 1/3 of the initial value, at this time, the distance from the movable component 101 to the second connecting port 1002 is 1/3L, the movable component 101 is in contact with the second detection pair 1022, and the detection circuit corresponding to the second detection pair 1022 is conducted to prompt that the air pressure value in the container to be detected is 3 times of the detection standard value. In this way, monitoring of various pressure abnormalities can be achieved by controlling the length of the probe 102.

The pressure detection device 10 in the embodiment of the application is simple in structure and easy to maintain, realizes monitoring of the pressure abnormal condition of the container to be detected under the condition of low cost, and reduces the use cost and the maintenance cost for users.

As shown in fig. 6, the present embodiment provides a detection system 1, and the detection system 1 includes a container 11 to be detected and a pressure detection device 10, where the pressure detection device 10 is any one of the above embodiments.

The container 11 to be tested is used for storing the fluid to be tested, the container 11 to be tested comprises a testing port 111, and the testing port 111 is connected with the first connecting port 1001 of the pressure testing device 10.

The pressure detection device 10 is used for detecting pressure abnormality in the container 11 to be detected.

In one specific example, referring to fig. 3 and 5, the pressure detection apparatus 10 includes a first detection pair 1021 and a second detection pair 1022, wherein the first detection pair 1021 extends into the second cavity 1004 by a depth of 1/2L, and the second detection pair 1022 extends into the second cavity 1004 by a length of 1/3L. Under the condition that the air pressure value in the first containing cavity 1003 is the standard inspection value of the container to be retrieved, the gas to be detected in the container to be detected 11 is filled into the second containing cavity 1004, after the gas is filled, the distance between the movable part 101 and the second connecting port 1002 is L, and the air pressure value in the second containing cavity 1004 is the standard inspection value of the container to be retrieved. The first connection port 1001 is connected to the container 11 to be detected, and if the air pressure value in the container 11 to be detected is greater than the air pressure value in the second accommodating cavity 1004, the movable member 101 moves toward the sealing cover 103 under the action of the fluid pressure of the container 11 to be detected, so as to reduce the volume of the second accommodating cavity 1004, and the movable member 101 stops moving until the pressure value in the second accommodating cavity 1004 is equal to the pressure value in the container 11 to be detected. When the pressure value in the container 11 to be detected is 2 times of the pressure value in the second cavity 1004, the volume of the second cavity 1004 is compressed to be half of the initial value, at this time, the distance from the movable component 101 to the second connecting port 1002 is 1/2L, the movable component 101 is in contact with the first detection pair 1021, and the first detection pair 1021 is conducted to the detection circuit corresponding to the 1021, so as to prompt that the air pressure value in the container 11 to be detected is 2 times of the detection standard value. When the pressure value in the container 11 to be detected is 3 times of the pressure value in the second accommodating cavity 1004, the volume of the second accommodating cavity 1004 is compressed to be 1/3 of the initial value, at this time, the distance from the movable component 101 to the second connecting port 1002 is 1/3L, the movable component 101 is in contact with the second detection pair 1022, and the detection circuit corresponding to the second detection pair 1022 is conducted, so as to prompt that the air pressure value in the container 11 to be detected is 3 times of the detection standard value.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A pressure detection apparatus, characterized by comprising:

the container detection device comprises a barrel, a detection device and a control device, wherein the barrel is provided with a cavity and further comprises a first connecting port which is used for being connected with a container to be detected;

the movable component is arranged in a cavity of the cylinder body and is in contact with the cavity wall of the cavity, the cavity is divided into a first containing cavity and a second containing cavity by the movable component, and when the fluid pressure of the first containing cavity is larger than the fluid pressure of the second containing cavity, the movable component is driven to move towards the second containing cavity;

a plurality of probe needles disposed in the second chamber, the plurality of probe needles having different distances from the movable member, the plurality of probe needles being configured to detect different pressures.

2. The pressure detection device of claim 1, further comprising a detection circuit comprising a detection pair, the detection pair outputting a pressure indication when contacting the movable member.

3. The pressure sensing device of claim 1, wherein the probe is a retractable stylus.

4. The pressure sensing apparatus of claim 1, further comprising a second connection port to which a sealing cap is connected, the plurality of probe pins being disposed on the sealing cap.

5. The pressure sensing device of claim 2, further comprising a sealing cover, wherein the sensing circuit is disposed within the sealing cover.

6. The pressure detection apparatus according to claim 1, characterized in that the pressure detection apparatus comprises: a plurality of probe pairs, a plurality of the probe pairs differing in length.

7. The pressure sensing device of claim 2, wherein the sensing circuit further comprises a signal output interface for outputting an electrical signal indicative of a pressure anomaly.

8. The pressure sensing device of claim 2, wherein the sensing circuit further comprises LED lights, wherein any of the probing pairs is connected to an LED light, and wherein the probing pair energizes the corresponding LED light to emit light when contacting the movable member.

9. The pressure sensing device of claim 1, wherein the movable member comprises a piston.

10. A test system comprising a container to be tested and a pressure test device according to any of claims 1-9, said first connection port being connected to said container to be tested.

Images