Pressure regulating device and gauge

Abstract

The utility model provides a kind of pressure regulating device and instrument, in the device, pressure detection unit is used to detect the inner cavity pressure of instrument in real time, and inner cavity pressure is sent to control unit;Control unit is used to judge the difference of detected inner cavity pressure and external pressure whether exceed preset range, if yes, then first control signal is sent to execution unit;If no, then second control signal is sent to execution unit;Execution unit is connected with sealing component, for driving sealing component to move to first position when receiving first control signal, driving sealing component to move to second position when receiving second control signal;Inner cavity has first opening with outside communication, sealing component is used to separate from first opening in first position, and seals first opening in second position.The scheme can make inner cavity pressure constant, so as to avoid affecting the stability of instrument structure or connecting pipeline, ensure the normal work of instrument.

Description

Technical Field

[0001] This utility model relates to the field of instrumentation, specifically to a pressure regulating device and instrument. Background Technology

[0002] Instruments refer to all instruments that can display numerical values. They are mainly used in the industrial production and manufacturing sector. To meet the monitoring needs of various values ​​in different industrial production processes, they can be divided into various types such as pressure instruments, temperature instruments, flow instruments, and power instruments, thereby providing accurate monitoring data for industrial production.

[0003] When instruments are used for gas data detection in gas pipelines or gas storage equipment, or when affected by changes in ambient temperature, the internal pressure of the instrument may change. Since increased internal pressure can affect the stability of the instrument structure or connecting pipelines, maintaining a constant internal pressure is crucial. This necessitates that the instrument possess an adaptive internal pressure regulation function to automatically adjust and balance the pressure difference between the inside and outside of the instrument, thereby ensuring its normal operation.

[0004] However, existing pressure regulating devices can only adaptively adjust when the internal pressure increases, but cannot adaptively adjust when the internal pressure decreases, thus failing to maintain a constant internal pressure in the instrument. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a pressure regulating device and instrument, which can solve the problem that the prior art cannot perform adaptive adjustment when the internal cavity pressure decreases, thus failing to maintain a constant internal cavity pressure of the instrument.

[0006] To achieve the purpose of this utility model, a pressure regulating device is provided for maintaining a constant internal pressure of an instrument, and includes a sealing component, a pressure detection unit, a control unit, and an execution unit, wherein...

[0007] The pressure detection unit is used to detect the internal pressure of the instrument in real time and send the internal pressure to the control unit;

[0008] The control unit is used to determine whether the difference between the detected internal pressure and the external pressure exceeds a preset range. If so, it sends a first control signal to the execution unit; if not, it sends a second control signal to the execution unit.

[0009] The execution unit is connected to the sealing component and is used to drive the sealing component to a first position when receiving the first control signal, and to drive the sealing component to a second position when receiving the second control signal.

[0010] The inner cavity has a first opening that communicates with the outside, and the sealing member is used to separate from the first opening at the first position and seal the first opening at the second position.

[0011] In some embodiments, the pressure detection unit includes a first detection module and a second detection module, wherein the first detection module and the second detection module are used to detect the internal pressure of the instrument in real time using different detection methods;

[0012] The control unit is used to determine whether the difference between the chamber pressure detected by the first detection module and the external pressure, and the difference between the chamber pressure detected by the second detection module and the external pressure both exceed the preset range. If they do, the control unit sends the first control signal to the execution unit; if they do not, the control unit sends the second control signal to the execution unit.

[0013] In some embodiments, the first detection module includes a measuring cavity, a flexible component, a contact component, a first elastic component, and a pressure sensor, wherein the measuring cavity is sealed to the outer wall of the inner cavity, and the inner cavity communicates with the measuring cavity through a second opening on its outer wall;

[0014] The pressure sensor is disposed within the measuring cavity, and the flexible component is disposed at the second opening and is elastically connected to the contact component via the first elastic component. The contact component abuts against the probe of the pressure sensor. The flexible component is used to change the force on the probe by deforming when the pressure in the cavity changes.

[0015] The pressure sensor is used to generate a change signal based on the magnitude of the force applied to the probe, and then converts it into an analog signal and sends it to the control unit.

[0016] In some embodiments, the second detection module includes a gas-sensitive thin film, a strain resistor, and a signal processor, wherein the gas-sensitive thin film is disposed in the inner cavity and is used to deform when the pressure in the inner cavity changes, thereby causing the resistance value of the strain resistor to change accordingly.

[0017] The strain gauge is used to send a corresponding charge signal to the signal processor when its resistance changes;

[0018] The signal processor is used to convert the charge signal into an analog signal and send it to the control unit.

[0019] In some embodiments, the execution unit includes a switching component, a circuit control component, a second elastic component, an electromagnet, and an iron core, wherein the switching component closes when it receives the first control signal and opens when it receives the second control signal;

[0020] The input terminal of the circuit control component is connected to the power supply, the output terminal of the circuit control component is connected to the electromagnet, and the control terminal of the circuit control component is connected to the switching component. The circuit control component is used to connect the power supply and the electromagnet when the switching component is closed, and to disconnect the power supply and the electromagnet when the switching component is open.

[0021] One end of the iron core is retractably disposed in the inner cavity through the second elastic member, and the other end of the iron core is connected to the sealing member;

[0022] When the electromagnet is connected to the power source, it generates a magnetic field to move the sealing component from the second position to the first position; when the electromagnet is disconnected from the power source, the iron core drives the sealing component to return to the second position under the elastic action of the second elastic component.

[0023] In some embodiments, the electromagnet includes a first mounting component and at least one set of coils, wherein the first mounting component is disposed through a cavity wall opposite to the first opening in the inner cavity, and the end of the first mounting component facing the first opening has a third opening;

[0024] The iron core and at least one set of coils are both disposed in the first mounting component, and at least one set of coils surrounds the iron core; one end of the iron core is retractably connected to the first mounting component through the second elastic component, and the other end of the iron core is connected to the sealing component through the third opening.

[0025] In some embodiments, the circuit control component includes a path component, a first contact component, and a second contact component, wherein the first contact component is connected to the electromagnet;

[0026] The pathway component is electrically connected to the power supply and is configured to be in a first state when the switch component is closed and in a second state when the switch component is open; in the first state, the pathway component is in electrical contact with the first contact component; in the second state, the pathway component is in contact with the second contact component.

[0027] In some embodiments, the pathway assembly includes a second mounting component, a driving component, a pathway component, and a third resilient component, wherein,

[0028] The second mounting component is fixedly connected to the inner cavity. The driving component, the passage component, and the third elastic component are all disposed in the second mounting component. The driving component is fixed to the second mounting component and is connected to the passage component in a transmission manner, and is insulated from each other. The third elastic component is located between the surface of the passage component away from the driving shaft and the inner wall of the second mounting component, and is in a compressed state.

[0029] The passage component is electrically connected to the power supply, and the first contact component and the second contact component are disposed in the second mounting component and are respectively located on both sides of the passage component away from and close to the drive shaft;

[0030] In the first state, the driving component is energized and drives the passage component to move to a position where it makes electrical contact with the first contact component; in the second state, the driving component is de-energized and the passage component moves to a position where it makes contact with the second contact component under the elastic action of the third elastic component.

[0031] In some embodiments, the pathway assembly further includes a sliding component and a guide rail component, wherein,

[0032] The sliding component and the guide rail component are disposed in the second mounting component, and the two are slidably engaged and electrically contacted; one of the sliding component and the guide rail component is fixedly connected to the second mounting component, and the other is fixedly and electrically connected to the passage component; the one of the sliding component and the guide rail component connected to the second mounting component is electrically connected to the power supply.

[0033] In some embodiments, the surface of the passage component is provided with an insulating layer, and the insulating layer is connected to the driving component via an insulating washer and is mutually insulated.

[0034] In some embodiments, the electromagnet further includes at least one positioning cylinder, each coil group is respectively disposed in each positioning cylinder, and the inner wall of each positioning cylinder is provided with a flame-retardant layer.

[0035] As another technical solution, the instrument provided by this utility model includes an inner cavity and the pressure regulating device mentioned above.

[0036] This utility model has the following beneficial effects:

[0037] In the technical solution of the pressure regulating device and instrument provided by this utility model, the internal cavity pressure is monitored in real time by a pressure detection unit and sent to the control unit. The control unit determines whether adjustment is needed based on the difference between the internal cavity pressure and the external pressure and a preset range of that difference, and sends a corresponding control signal to the execution unit. The execution unit drives the sealing component to move to a first position or a second position according to the control signal, respectively opening or closing the first opening connecting the internal cavity to the outside. In this way, it can adaptively adjust not only when the internal cavity pressure increases, but also when the internal cavity pressure decreases, ensuring that the internal cavity pressure remains constant. Attached Figure Description

[0038] Figure 1 An overall structural diagram of the instrument provided by this utility model when installed in a pipeline;

[0039] Figure 2 This is a structural diagram of the inner surface of the cover in this utility model;

[0040] Figure 3 Internal structural diagram of the instrument provided by this utility model when installed in a pipeline;

[0041] Figure 4 A cross-sectional view of the pressure regulating device provided by this utility model installed on an instrument;

[0042] Figure 5 This is a cross-sectional view of the execution unit in this utility model;

[0043] Figure 6 This is a cross-sectional view of the circuit control component in this utility model. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solution of this utility model, the pressure regulating device and instrument provided by this utility model will be described in detail below with reference to the accompanying drawings.

[0045] This utility model provides a pressure regulating device for maintaining a constant internal pressure in an instrument, specifically, keeping the difference between the internal pressure and the external pressure within a preset range. This ensures that when the instrument is used for gas data detection in gas pipelines or gas storage equipment, or when affected by changes in ambient temperature, maintaining a constant internal pressure prevents disruption to the instrument's structure or connecting pipeline stability, thus guaranteeing the instrument's normal operation. The pressure regulating device provided in this utility model is applicable to pressure gauges, temperature gauges, flow meters, and power meters, as well as other instruments requiring a constant internal pressure. A specific embodiment is described below. Figures 1 to 3The instrument 100 includes an inner cavity 10 formed by a housing 1, an instrument panel 2 disposed on the top of the housing 1, and a cover 3 disposed on the top of the instrument panel 2. The instrument panel 2 is used to display data monitored by the instrument 100. The cover 3 is used to protect the instrument panel 2. Furthermore, as... Figure 2 As shown, an insulation layer 4 and a sealing ring (not shown) located inside the cover 3 and the instrument panel 2, which are opposite to each other, can also be provided for heat insulation and sealing protection of the instrument panel 2. The material of the insulation layer 4 includes, for example, aluminum silicate cotton. Figure 1 and Figure 3 The illustration shows an application scenario where the instrument 100 is installed on the pipeline 200 for gas data detection in the gas pipeline. However, the instrument provided by this utility model is not limited to this application scenario. In practical applications, it can also be applied to any other scenario where various values ​​need to be monitored.

[0046] like Figure 3 As shown, the pressure regulating device 5 includes a sealing component 51, a pressure detection unit 52, a control unit 54, and an execution unit 55. The pressure detection unit 52 includes, for example, a first detection module 520a and a second detection module 520b, which will be described in detail later. The pressure detection unit 52 is used to detect the internal pressure of the instrument 100 in real time and send the internal pressure to the control unit 54. The control unit 54 is used to determine whether the difference between the detected internal pressure and the external pressure exceeds a preset range. If so, it sends a first control signal to the execution unit 55; if not, it sends a second control signal to the execution unit 55. The execution unit 55 is connected to the sealing component 51 and is used to drive the sealing component 51 to a first position when it receives the first control signal, and to drive the sealing component 51 to a second position when it receives the second control signal. Figure 3 As shown in the figure; the inner cavity 10 has a first opening 11 that communicates with the outside, and the sealing member 51 is used to separate from the first opening 11 in the first position and seal the first opening 11 in the second position.

[0047] The pressure detection unit 52 monitors the internal cavity pressure in real time and sends the pressure data to the control unit 54. The control unit 54 determines whether adjustment is needed based on the difference between the internal cavity pressure and the external pressure, and a preset range for that difference, and sends a corresponding control signal to the execution unit 55. The execution unit 55 drives the sealing component 51 to either a first or second position according to the control signal, thereby opening or closing the first opening 11 connecting the internal cavity 10 to the outside. This allows for adaptive adjustment not only when the internal cavity pressure increases but also when it decreases, ensuring that the internal cavity pressure remains constant.

[0048] In some embodiments, the pressure detection unit 52 includes a first detection module 520a and a second detection module 520b, which are used to detect the internal pressure of the instrument 100 in real time using different detection methods. The control unit 54 is used to determine whether the difference between the chamber pressure detected by the first detection module 520a and the external pressure, and the difference between the chamber pressure detected by the second detection module 520b and the external pressure, both exceed a preset range. If so, a first control signal is sent to the execution unit 55; otherwise, a second control signal is sent to the execution unit 55.

[0049] Specifically, the first detection module 520a and the second detection module 520b can be respectively disposed on opposite sides of the inner cavity 10. Figure 3 The left and right sidewalls of the inner shell 1. This allows for monitoring of internal cavity pressure changes at different locations, thereby reducing detection blind spots. This layout is particularly advantageous when the inner cavity 10 is large or has a complex shape.

[0050] The first detection module 520a and the second detection module 520b employ different detection methods to monitor the internal pressure of the instrument 100 in real time. This combination of different detection methods ensures the comprehensiveness and accuracy of pressure detection. For example, the first detection module 520a can be based on a mechanical sensor, while the second detection module 520b can be based on an electronic sensor. The two complement each other, effectively reducing the risk of malfunctions or misjudgments due to a single monitoring method. The control unit 54 only triggers the adjustment action when both detection modules detect that the difference between the internal pressure and the external pressure exceeds a preset range. This dual verification mechanism ensures more precise triggering of the adjustment action, avoiding malfunctions caused by errors or interference from a single detection module, thereby improving the accuracy of pressure regulation. Furthermore, the collaborative work of the two detection modules and the dual verification mechanism enable the device to maintain stable operation under various pressure changes. Even if one detection module malfunctions or is interfered with, the other module can still provide reliable data, ensuring the device can still operate normally even with partial failures and enhancing its fault tolerance.

[0051] In some embodiments, the first detection module 520a may be based on a mechanical sensor; specifically, please refer to [link to relevant documentation]. Figure 4The first detection module 520a includes a measuring cavity 521, a flexible component 522, a contact component 523, a first elastic component 524, and a pressure sensor 525. The measuring cavity 521 is sealed to the outer wall of the inner cavity 10, and the inner cavity 10 communicates with the measuring cavity 521 through a second opening 13 on its outer wall. For example, the measuring cavity 521 is located outside the housing 1 and is sealed to the right side wall of the housing 1. The right side wall has a second opening 13, and the measuring cavity 521 also has an opening opposite to the second opening 13, so that the second opening 13 can communicate with the interior of the measuring cavity 521. A pressure sensor 525 is disposed within the measuring cavity 521. A flexible component 522 is disposed at the second opening 13 and is elastically connected to a contact component 523 via a first elastic component 524. The contact component 523 abuts against the probe 525a of the pressure sensor 525. The flexible component 522 is used to change the force on the probe 525a of the pressure sensor 525 by deforming when the internal pressure changes. The pressure sensor 525 is used to generate a change signal based on the force on the probe 525a, convert it into an analog signal, and send it to the control unit 54. The aforementioned change signal is, for example, a resistance change signal.

[0052] Furthermore, in some embodiments, the aforementioned flexible component 522 is spherical, and for example, a soft rubber ball, which has good elasticity and can deform rapidly when pressure changes, thereby enabling timely detection of minute changes in internal cavity pressure and improving the sensor's response speed. In addition, the spherical flexible component 522 can be connected to the first elastic component 524 via an arc-shaped plate 526, the inner surface of which is in contact with the outer surface of the flexible component 522. This allows for more sensitive transmission of force to the contact component 523 when the flexible component 522 deforms due to changes in internal cavity pressure, thus enabling the contact component 523 to respond more sensitively to pressure changes.

[0053] The first elastic member 524 is in a compressed state, used to keep the contact member 523 in contact with the probe 525a of the pressure sensor 525. When the flexible member 522 deforms due to changes in the internal pressure, the length of the first elastic member 524 changes under its own elastic force, thereby changing the pressure applied by the contact member 523 to the probe 525a, that is, changing the magnitude of the force on the probe 525a of the pressure sensor 525. The first elastic member 524 is, for example, a compression spring. When the internal pressure increases, the flexible member 522 deforms towards the pressure sensor 525, at which time the pressure applied by the contact member 523 to the probe 525a increases; when the internal pressure decreases, the flexible member 522 deforms away from the pressure sensor 525, at which time the pressure applied by the contact member 523 to the probe 525a decreases.

[0054] The probe 525a of the pressure sensor 525 includes, for example, a piezoresistive element and a signal processor (neither shown in the figure). The piezoresistive element abuts against the contact member 523. When the flexible member 522 deforms due to changes in internal pressure, the contact member 523 moves with the flexible member 522 towards or away from the piezoresistive element. At this time, the piezoresistive element generates a resistance change signal due to the change in force, and sends this signal to the signal processor. The signal processor converts this signal into an analog signal and sends it to the control unit 54.

[0055] The combination of the flexible component 522, the contact component 523, and the first elastic component 524 enables highly sensitive detection of changes in internal cavity pressure. The flexible component 522 alters the pressure applied to the probe 525a by the contact component 523 when the internal cavity pressure changes; this mechanical transmission method precisely converts deformation into pressure change. Furthermore, the combination of the flexible component 522 and the first elastic component 524 adapts to bidirectional changes in internal cavity pressure. Whether the pressure increases or decreases, it precisely changes the pressure applied to the probe 525a by the contact component 523, ensuring that the pressure sensor 525 accurately detects pressure changes.

[0056] The aforementioned mechanical sensors exhibit high stability and anti-interference capabilities, enabling them to operate reliably in complex industrial environments. Compared to electronic sensors, mechanical sensors are less affected by external factors such as temperature changes and electromagnetic interference, thereby improving system reliability.

[0057] In some embodiments, the second detection module 520b may be based on an electronic sensor. Specifically, the second detection module 520b includes a gas-sensitive thin film 531, a strain gauge 532, and a signal processor 533. The gas-sensitive thin film 531 is disposed within the inner cavity 10 and electrically connected to the strain gauge 532. It deforms when the pressure in the inner cavity changes, causing a change in the resistance of the strain gauge 532. The strain gauge 532 sends a corresponding charge signal to the signal processor 533 when its resistance changes. The signal processor 533 converts the charge signal into an analog signal and sends it to the control unit 54. The gas-sensitive thin film 531, disposed within the inner cavity 10, can directly sense changes in the pressure in the inner cavity. When the pressure in the inner cavity changes, the gas-sensitive thin film 531 deforms, and this deformation is quickly transmitted to the strain gauge 532. The strain gauge 532, electrically connected to the gas-sensitive thin film 531, can quickly respond to the deformation of the gas-sensitive thin film 531, generating a corresponding change in resistance. This rapid response capability enables the second detection module 520b to sensitively detect minute changes in the internal pressure. Changes in the resistance of the strain gauge 532 trigger corresponding charge signals, which are then sent to the signal processor 533. The combination of the gas-sensitive thin film 531 and the strain gauge 532 reduces errors caused by mechanical transmission or the sensor itself, thereby improving the accuracy of pressure detection. Furthermore, the combination of the gas-sensitive thin film 531 and the strain gauge 532 can adapt to a wide pressure range, accurately detecting pressure changes whether they are increasing or decreasing.

[0058] In some embodiments, the control unit 54 includes, for example, a microprocessor module. This microprocessor module may include a circuit board and an MCU (Microcontroller Unit) chip structure mounted on the circuit board. The MCU chip, for example, is a single-chip microcomputer module used to execute control logic and output control signals. Specifically, the microprocessor module may also include an analog-to-digital converter (ADC) and a digital signal processor (DSP). The ADC converts the analog signals regarding the change in internal cavity pressure sent by the first detection module 520a and the second detection module 520b into digital signals. The DSP processes the digital signals and inputs the digital signals corresponding to the pressure changes into the MCU chip. The MCU chip receives the processed digital signals and outputs level signals (i.e., a first control signal or a second control signal) through an I / O port to control the execution unit 55 to perform corresponding actions.

[0059] The execution unit 55 is connected to the sealing member 51 and is used to drive the sealing member 51 to a first position when a first control signal is received, and to drive the sealing member 51 to a second position when a second control signal is received. The execution unit 55, which implements this function, includes a switching member (not shown), a circuit control component 550, a second elastic member 551, an electromagnet, and an iron core 553. The switching member closes when the first control signal is received and opens when the second control signal is received. This switching member is, for example, a relay, which can be closed or opened under the control of a level signal output by the MCU chip.

[0060] The input terminal of the circuit control component 550 is connected to the power supply (not shown in the figure), the output terminal of the circuit control component 550 is connected to the electromagnet, and the control terminal of the circuit control component 550 is connected to the switching component. The circuit control component 550 is used to connect the power supply and the electromagnet when the switching component is closed, so that the power supply provides electrical energy to the electromagnet, causing the electromagnet to generate a magnetic field that attracts the iron core 553 to move. When the switching component is open, the power supply and the electromagnet are disconnected, so that the electromagnet is de-energized and the magnetic field disappears.

[0061] The iron core 553 is, for example, an armature core 553. One end of the iron core 553 is telescopically disposed in the inner cavity 10 via a second elastic member 551, and the other end of the iron core 553 is connected to the sealing member 51. Under the elastic action of the second elastic member 551, the iron core 553 can automatically reset when the electromagnet is de-energized. Specifically, when the electromagnet is powered on, it generates a magnetic field that attracts the iron core 553 to move, causing the iron core 553 to move the sealing member 51 from the second position to the first position. At this time, the sealing member 51 separates from the first opening 11 of the inner cavity 10, and the inner cavity 10 is connected to the outside. When the electromagnet is disconnected from the power supply, the electromagnet no longer generates a magnetic field. At this time, under the elastic action of the second elastic member 551, the iron core 553 drives the sealing member 51 to reset to the second position, thereby causing the sealing member 51 to reseal the first opening 11 and isolate the inner cavity 10 from the outside. This elastic reset mechanism ensures that the device can reliably return to its initial state when the electromagnet is de-energized, improving the stability and reliability of the device. Moreover, it can adapt to bidirectional changes in internal pressure. Whether the pressure increases or decreases, it can achieve precise pressure regulation through the magnetic field control of the electromagnet and the elastic reset mechanism.

[0062] Furthermore, in some embodiments, please refer to Figure 5 and combined Figure 4The electromagnet includes a first mounting component 554 and at least one set of coils 552. The first mounting component 554 is disposed through the cavity wall of the inner cavity 10 opposite to the first opening 11. Taking the shell 1 constituting the inner cavity 10 as a rectangular shell as an example, the first opening 11 and the first mounting component 554 are respectively disposed on two opposite side walls on the left and right sides of the rectangular shell. The end of the first mounting component 554 facing the first opening 11 has a third opening 555a. At least one set of coils 552 and an iron core 553 are disposed in the first mounting component 554. Specifically, the first mounting component 554 is provided with a first accommodating space 555, which has a third opening 555a opposite to the first opening 11; at least one set of coil groups 552 and iron core 553 are both disposed in the first accommodating space 555, and at least one set of coil groups 552 surrounds the iron core 553; one end of the iron core 553 is retractably connected to the first mounting component 554 through a second elastic member 551, and the other end of the iron core 553 is connected to the sealing member 51 through the third opening 555a.

[0063] For example, there are at least two coil groups 552. Using at least two coil groups 552 can significantly enhance the magnetic field strength generated by the electromagnet. Multiple coil groups 552 can be connected in parallel or series to increase the total current and thus enhance the magnetic field strength. A stronger magnetic field can more effectively attract the iron core 553, ensuring that the iron core 553 can quickly move to a designated position when needed. Furthermore, by evenly distributing at least two coil groups 552 around the iron core 553, a more uniform magnetic field can be generated. A uniform magnetic field can more precisely control the movement of the iron core 553, reducing the problem of iron core 553 offset or jamming caused by uneven magnetic field, and improving the stability and reliability of the system. In one specific embodiment, there are two coil groups 552, located on opposite sides of the first accommodating space 555, for example... Figure 4 The first accommodating space 555 is located at the top and bottom in the vertical direction, and the iron core 553 is disposed between the two sets of coil groups 552.

[0064] In some embodiments, the electromagnet further includes at least one positioning cylinder 556, each positioning cylinder 556 being disposed in the first accommodating space 555 and fixedly connected to the first mounting component 554. The internal spaces of each positioning cylinder 556 are independent, and each coil group 552 is respectively disposed in its respective positioning cylinder 556. The positioning cylinder 556 is used to fix the corresponding coil group 552 at a corresponding position in the first accommodating space 555, thereby facilitating the installation and positioning of the coil group 552 around the iron core 553. Furthermore, by disposing of the coil groups 552 in independent positioning cylinders 556, electromagnetic interference between the coil groups 552 can be effectively reduced, further improving the uniformity and stability of the magnetic field.

[0065] In some embodiments, the inner wall of each positioning cylinder 556 is provided with a flame-retardant layer 556a. The flame-retardant layer 556a effectively prevents the risk of fire caused by overheating or short circuits during operation of the coil assembly 552, improving the safety of the device, especially in high-temperature or flammable environments. The flame-retardant layer 556a not only has fire-retardant properties but also provides a certain degree of insulation and protection, reducing mechanical damage and chemical corrosion to the coil assembly 552 during operation, thereby extending the service life of the coil assembly 552 and improving the reliability of the system. The flame-retardant layer 556a is, for example, a halogen flame-retardant layer 556a.

[0066] The specific way in which one end of the iron core 553 is telescopically connected to the first mounting component 554 via the second elastic component 551 is as follows: at least one guide post 557 is provided on the inner wall of the first mounting component 554 opposite to the third opening 555a, and at least one guide cylinder 558 is provided on the end of the iron core 553 opposite to the inner wall. Each guide post 557 can be inserted into each guide cylinder 558 in a corresponding manner, and the outer peripheral surface of each guide post 557 slides in cooperation with the inner peripheral surface of each guide cylinder 558, thereby limiting the movement direction of the iron core 553 and preventing it from deviating or getting stuck.

[0067] In some embodiments, the second elastic member 551 is, for example, a compression spring, which is sleeved around the slidingly fitted guide cylinder 558 and guide post 557, with its two ends abutting against the inner wall and the end face of the iron core 553 opposite to the inner wall, respectively. The compression spring is in a compressed state so that the sealing member 51 can be held in a second position sealing the first opening 11 under the elastic force of the compression spring. It is readily understood that the driving force of the magnetic field generated by the electromagnet when connected to a power source acting on the iron core 553 should be greater than the elastic force of the compression spring in order to allow the sealing member 51 to overcome the elastic force and separate from the first opening 11.

[0068] In some embodiments, such as Figure 4 As shown, the sealing component 51 may include a valve stem 511 and a spherical valve core 512. One end of the valve stem 511 is connected to the iron core 553, and the other end is connected to the spherical valve core 512. A sealing ring 12 is provided at the end of the first opening 11 facing the spherical valve core 512. When the sealing component 51 is in the first position, the spherical valve core 512 is in sealing contact with the sealing ring 12 to seal the first opening 11. When the sealing component 51 is in the second position, the spherical valve core 512 separates from the sealing ring 12 to open the first opening 11.

[0069] The circuit control assembly 550 is used to connect the power supply to the electromagnet when the switching component is closed, and to disconnect the power supply from the electromagnet when the switching component is open. Figure 5 and Figure 6As shown, the circuit control component 550 that implements this function includes, for example, a circuit component 550a, a first contact component 5507, and a second contact component 5508. The first contact component 5507 is connected to an electromagnet. The circuit component 550a is electrically connected to a power supply (not shown) and is configured to be in a first state when the switch component is closed and in a second state when the switch component is open. In the first state, the circuit component 550a is in electrical contact with the first contact component 5507 to conduct the power supply to the electromagnet, causing the electromagnet to generate a magnetic field. In the second state, the circuit component 550a is in contact with the second contact component 5508, at which time the power supply is disconnected from the electromagnet, and the electromagnet does not generate a magnetic field.

[0070] The passage component 550a that achieves the above functions includes, for example, a second mounting component 5501, a driving component 5502, a passage component 5503, and a third elastic component 5504. The second mounting component 5501 is fixedly connected to the inner cavity 10. In an embodiment where the first mounting component 554 is disposed through the cavity wall of the inner cavity 10 opposite to the first opening 11, as shown... Figure 4 As shown, a portion of the first mounting component 554 is located inside the inner cavity 10, and another portion is located outside the inner cavity 10. In this case, as... Figure 5 As shown, the second mounting component 5501 can be fixed to the portion of the first mounting component 554 located outside the inner cavity 10 to facilitate the connection between the corresponding component mounted on the second mounting component 5501 and the electromagnet. Furthermore, the control unit 54 can also be fixed to the portion of the first mounting component 554 located outside the inner cavity 10 to facilitate its connection with the circuit control assembly 550.

[0071] The driving component 5502, the passage component 5503, and the third elastic component 5504 are all disposed in the second mounting component 5501. Specifically, the second mounting component 5501 is provided with a second accommodating space 5509, and the driving component 5502, the passage component 5503, and the third elastic component 5504 are all disposed in the second accommodating space 5509. In some embodiments, a fixing seat 5510 is further provided in the second accommodating space 5509. The fixing seat 5510 is provided with a fixing seat cavity 5511, and the driving component 5502 and the third elastic component 5504 can both be installed in the fixing seat cavity 5511. In this case, the fixing seat cavity 5511 is parallel to the moving direction of the iron core 553 (i.e., Figure 6Vertical grooves (not shown in the figure) are also provided through the two side walls of the cavity (in the horizontal direction). The passage component 5503 is, for example, strip-shaped. The middle part of the passage component 5503 is disposed in the fixed seat cavity 5511, and the two ends of the passage component 5503 extend to the outside of the fixed seat cavity 5511 through the vertical grooves on the two side walls of the fixed seat cavity 5511. With the help of the fixed seat 5510, the components located inside and outside the fixed seat cavity 5511 can be separated, reducing mechanical and electromagnetic interference between components. This isolation effect improves the stability and reliability of the device.

[0072] The drive component 5502 is, for example, a linear cylinder; to reduce space requirements, it can be a miniature cylinder. The drive component 5502 is energized when the switch component is closed and de-energized when the switch component is open. The drive component 5502 is fixed to the second mounting component 5501 and is drive-connected to the passage component 5503, but they are insulated from each other. Specifically, the drive component 5502 is insulated from the passage component 5503 and is used to drive the passage component 5503 to move when energized and to stop driving the passage component 5503 to move when de-energized. The drive shaft 5502a of the drive component 5502 is drive-connected to the passage component 5503, and the insulation between them can take various forms. For example, the surface of the passage component 5503 is provided with an insulating layer, and this insulating layer is fixedly connected to the drive component 5502 (e.g., its drive shaft 5502a) by an insulating washer. The insulating layer can cover the entire surface of the passage component 5503.

[0073] The third elastic member 5504 is located between the surface of the passage member 5503 away from the drive shaft 5502a and the inner wall of the second mounting member 5501, and is in a compressed state. In the embodiment with the aforementioned fixing seat 5510, the third elastic member 5504 is disposed in the fixing seat cavity 5511, located between the surface of the passage member 5503 away from the drive shaft 5502a and the top wall of the fixing seat cavity 5511, and is in a compressed state. When the drive member 5502 is de-energized, the passage member 5503 can be reset to its initial position under the elastic force of the third elastic member 5504. The third elastic member 5504 is, for example, a compression spring, and there can be one or more third elastic members 5504.

[0074] The passage component 5503 is electrically connected to a power source. The first contact component 5507 and the second contact component 5508 are disposed in the second mounting component 5501, i.e., in the second accommodating space 5509, and are located on opposite sides of the passage component 5503, away from and near the drive shaft 5502a, respectively. In the embodiment with the aforementioned fixing base 5510, both the first contact component 5507 and the second contact component 5508 are located outside the fixing base cavity 5511 and are positioned opposite each other on opposite sides of the passage component 5503 in the direction of movement of the drive shaft 5502a. The first contact component 5507 is connected to an electromagnet. In the first state, the drive component 5502 is energized, driving the passage component 5503 to move to a position electrically contacting the first contact component 5507. In the second state, the drive component 5502 is de-energized, and under the elastic force of the third elastic component 5504, the passage component 5503 can reset to the position contacting the second contact component 5508 (i.e., the initial position).

[0075] In an embodiment where the electromagnet includes two sets of coil groups 552, the first contact component 5507 may include two pass contacts located on both sides of the fixed base 5510 and electrically connected to the input terminals of the two sets of coil groups 552, respectively. The output terminals of the two sets of coil groups 552 are electrically connected to the negative terminal of the power supply. Furthermore, two first contact heads 5512 may be provided on the surface of the pass component 5503 away from the drive shaft 5502a, for electrical contact with the two pass contacts of the first contact component 5507 when the drive component 5502 is energized. The second contact component 5508 may include two disconnect contacts, and two second contact heads 5513 may be provided on the surface of the pass component 5503 near the drive shaft 5502a, for contact with the two disconnect contacts of the second contact component 5508 when the drive component 5502 is de-energized.

[0076] To ensure that the passage component 5503 maintains electrical connection with the power supply during movement, in some embodiments, the passage assembly further includes a sliding component 5505 and a guide rail component 5506, both disposed in the second mounting component 5501, i.e., disposed in the second accommodating space 5509. The sliding component 5505 and the guide rail component 5506 are used to slide and engage, enabling the passage component 5503 to maintain electrical connection with the power supply during movement. Specifically, the sliding component 5505 and the guide rail component 5506 are disposed in the second accommodating space 5509, and they slide and engage, making electrical contact. In embodiments where the first contact component 5507 may include two passage contacts, there are two sets of sliding components 5505 and guide rail components 5506, respectively disposed on both sides of the passage component 5503, and both located between the passage contact of the first contact component 5507 and the circuit breaker contact of the second contact component 5508. One of the sliding component 5505 and the guide rail component 5506 is fixedly connected to the second mounting component 5501, and the other is fixedly and electrically connected to the passage component 5503. The one of the sliding component 5505 and the guide rail component 5506 connected to the second mounting component 5501 is electrically connected to a power source. For example, in this embodiment, the guide rail component 5506 is fixedly connected to the second mounting component 5501 and electrically connected to a power source, while the sliding component 5505 is fixedly and electrically connected to the passage component 5503. The sliding component 5505 is, for example, a conductive electrode plate, and the guide rail component 5506 is, for example, a conductive slide rod.

[0077] When the switch is closed, the circuit assembly 550a is in the first state. At this time, the drive component 5502 is energized, driving the circuit assembly 5503 to move to a position where it makes electrical contact with the first contact component 5507 (the two first contact heads 5512 respectively make electrical contact with the two circuit contacts). At this point, the current output from the positive terminal of the power supply can sequentially flow through the guide rail component 5506, the sliding component 5505, the two first contact heads 5512, and the two circuit contacts into the two sets of coil groups 552, and is output from the output terminals of the two sets of coil groups 552 to the negative terminal of the power supply, thus forming a power supply circuit. When the switch is open, the circuit assembly 550a is in the second state. At this time, the drive component 5502 is de-energized, and the circuit assembly 5503 moves to a position where it makes contact with the second contact component 5508 (the two second contact heads 5513 respectively make electrical contact with the two circuit breakers) under the elastic action of the third elastic component 5504. At this point, the aforementioned power supply circuit is disconnected. Specifically, several terminals can be provided on the circuit board of the control unit 54 for electrically connecting the negative terminal of the power supply and the output terminal of the coil group 552 through several wires, and electrically connecting the positive terminal of the power supply to the guide rail component 5506.

[0078] As another technical solution, this utility model embodiment also provides an instrument 100, which includes an inner cavity 10 and the pressure regulating device 5 provided in this utility model embodiment.

[0079] The instrument 100 provided in this embodiment of the present invention can maintain a constant internal pressure by using the pressure regulating device 5 provided in this embodiment of the present invention, thereby avoiding affecting the stability of the instrument 100 structure or connecting pipeline and ensuring the normal operation of the instrument 100.

[0080] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A pressure regulating device, characterized by, Used to maintain a constant internal pressure in the instrument, and includes sealing components, a pressure detection unit, a control unit, and an execution unit, wherein, The pressure detection unit is used to detect the internal pressure of the instrument in real time and send the internal pressure to the control unit; The control unit is used to determine whether the difference between the detected internal pressure and the external pressure exceeds a preset range. If so, it sends a first control signal to the execution unit; if not, it sends a second control signal to the execution unit. The execution unit is connected to the sealing component and is used to drive the sealing component to a first position when receiving the first control signal, and to drive the sealing component to a second position when receiving the second control signal. The inner cavity has a first opening that communicates with the outside, and the sealing member is used to separate from the first opening at the first position and seal the first opening at the second position.

2. The pressure regulating device according to claim 1, characterized in that, The pressure detection unit includes a first detection module and a second detection module, which are used to detect the internal pressure of the instrument in real time using different detection methods. The control unit is used to determine whether the difference between the chamber pressure detected by the first detection module and the external pressure, and the difference between the chamber pressure detected by the second detection module and the external pressure both exceed the preset range. If they do, the control unit sends the first control signal to the execution unit; if they do not, the control unit sends the second control signal to the execution unit.

3. The pressure regulating device according to claim 2, characterized in that, The first detection module includes a measuring cavity, a flexible component, a contact component, a first elastic component, and a pressure sensor, wherein the measuring cavity is sealed to the outer wall of the inner cavity, and the inner cavity communicates with the measuring cavity through a second opening on its outer wall; The pressure sensor is disposed within the measuring cavity, and the flexible component is disposed at the second opening and is elastically connected to the contact component via the first elastic component. The contact component abuts against the probe of the pressure sensor. The flexible component is used to change the force on the probe by deforming when the pressure in the cavity changes. The pressure sensor is used to generate a change signal based on the magnitude of the force applied to the probe, and then converts it into an analog signal and sends it to the control unit.

4. The pressure regulating device according to claim 2, characterized in that, The second detection module includes a gas-sensitive thin film, a strain resistor, and a signal processor. The gas-sensitive thin film is disposed in the inner cavity and is used to deform when the pressure in the inner cavity changes, so that the resistance value of the strain resistor changes accordingly. The strain gauge is used to send a corresponding charge signal to the signal processor when its resistance changes; The signal processor is used to convert the charge signal into an analog signal and send it to the control unit.

5. The pressure regulating device according to any one of claims 1-4, characterized in that, The execution unit includes a switching component, a circuit control assembly, a second elastic component, an electromagnet, and an iron core, wherein the switching component closes when it receives the first control signal and opens when it receives the second control signal; The input terminal of the circuit control component is connected to the power supply, the output terminal of the circuit control component is connected to the electromagnet, and the control terminal of the circuit control component is connected to the switching component. The circuit control component is used to connect the power supply and the electromagnet when the switching component is closed, and to disconnect the power supply and the electromagnet when the switching component is open. One end of the iron core is retractably disposed in the inner cavity through the second elastic member, and the other end of the iron core is connected to the sealing member; When the electromagnet is connected to the power source, it generates a magnetic field to move the sealing component from the second position to the first position; when the electromagnet is disconnected from the power source, the iron core drives the sealing component to return to the second position under the elastic action of the second elastic component.

6. The pressure regulating device according to claim 5, characterized in that, The electromagnet includes a first mounting component and at least one set of coils, wherein the first mounting component is disposed through the cavity wall opposite to the first opening in the inner cavity, and the end of the first mounting component facing the first opening has a third opening; The iron core and at least one set of coils are both disposed in the first mounting component, and at least one set of coils surrounds the iron core; one end of the iron core is retractably connected to the first mounting component through the second elastic component, and the other end of the iron core is connected to the sealing component through the third opening.

7. The pressure regulating device according to claim 5, characterized in that, The circuit control component includes a path component, a first contact component, and a second contact component, wherein the first contact component is connected to the electromagnet. The pathway component is electrically connected to the power supply and is configured to be in a first state when the switch component is closed and in a second state when the switch component is open; in the first state, the pathway component is in electrical contact with the first contact component; in the second state, the pathway component is in contact with the second contact component.

8. The pressure regulating device according to claim 7, characterized in that, The pathway assembly includes a second mounting component, a driving component, a pathway component, and a third elastic component, wherein, The second mounting component is fixedly connected to the inner cavity. The driving component, the passage component, and the third elastic component are all disposed in the second mounting component. The driving component is fixed to the second mounting component and is drivenly connected to the passage component, and is insulated from each other. The driving component includes a driving shaft, which is drivenly connected to the passage component. The third elastic component is located between the surface of the passage component away from the driving shaft and the inner wall of the second mounting component, and is in a compressed state. The passage component is electrically connected to the power supply, and the first contact component and the second contact component are disposed in the second mounting component and are respectively located on both sides of the passage component away from and close to the drive shaft; In the first state, the driving component is energized and drives the passage component to move to a position where it makes electrical contact with the first contact component; in the second state, the driving component is de-energized and the passage component moves to a position where it makes contact with the second contact component under the elastic action of the third elastic component.

9. The pressure regulating device according to claim 8, characterized in that, The pathway assembly further includes a sliding component and a guide rail component, wherein... The sliding component and the guide rail component are disposed in the second mounting component, and the two are slidably engaged and electrically contacted; one of the sliding component and the guide rail component is fixedly connected to the second mounting component, and the other is fixedly and electrically connected to the passage component; the one of the sliding component and the guide rail component connected to the second mounting component is electrically connected to the power supply.

10. The pressure regulating device according to claim 8, characterized in that, The surface of the passage component is provided with an insulating layer, and the insulating layer is connected to the driving component through an insulating washer and is mutually insulated.

11. The pressure regulating device according to claim 6, characterized in that, The electromagnet also includes at least one positioning cylinder, each of the coil groups is respectively disposed in each of the positioning cylinders, and the inner wall of each positioning cylinder is provided with a flame-retardant layer.

12. An instrument comprising an inner cavity, characterized in that, It also includes the pressure regulating device as described in any one of claims 1-11.

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