A barostat

Abstract

This utility model discloses a pneumatically adjustable resistor, including a gas source, a resistor assembly, external wiring, a connecting air path, and a control device. In the resistor assembly, a cylindrical resistor body extends along a first direction, and a slider is slidably mounted within the resistor body along the first direction, dividing its interior into a first chamber and a second chamber. The external wiring includes a first line connected to the slider and a second line connected to one end of the resistor body. The connecting air path connects the gas source to at least one of the first and second chambers. The control device controls the opening and closing of the connecting air path, using pneumatic pressure to drive the slider to move, thereby changing the resistance value of the resistor body connected to the circuit. This utility model replaces traditional mechanical transmission with pneumatic drive, avoiding manual operation. It has a simple and reliable structure, is suitable for harsh environments, and compared to existing motor-driven solutions, has a simpler and more stable structure, solving the problems of inconvenient adjustment and poor environmental adaptability of existing resistors.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to a pressure-regulating resistor. Background Technology

[0002] Existing sliding resistor components typically require manual adjustment of the slider position to change the resistance value as needed. This manual adjustment method has limitations in harsh environments (such as high temperature, high pressure, high dust, or corrosive environments). Manual resistance adjustment is not only inconvenient to operate, but may also cause harm to operators due to environmental risks.

[0003] To address this, some existing technologies attempt to replace manual adjustment with motor-driven mechanisms. However, such solutions have the following drawbacks: First, mechanical drive systems are complex and expensive, hindering equipment miniaturization and low-cost applications. Second, the mechanical components in the motor drive mechanism are susceptible to dust, liquid corrosion, or extreme temperatures, leading to transmission jams, motor burnout, and other malfunctions, making long-term stable resistance adjustment impossible. Utility Model Content

[0004] The present invention aims to provide a gas pressure adjustable resistor with a simple and stable structure, capable of adapting to harsh environments, and requiring no manual operation for resistance adjustment.

[0005] To solve the above-mentioned technical problems, this utility model provides a pneumatically adjustable resistor, comprising:

[0006] Gas source, used to provide inert gas;

[0007] A resistor assembly includes a resistor body and a slider. The resistor body is arranged in a cylindrical shape extending along a first direction, and the slider is slidably mounted in the resistor body along the first direction to separate and form a first chamber and a second chamber arranged sequentially along the first direction.

[0008] The external circuit includes a first circuit connected to the slider and a second circuit connected to one axial end of the resistor.

[0009] A connecting gas path is disposed between the gas source and the resistor assembly, the connecting gas path connecting the gas source and at least one of the first chamber and the second chamber; and...

[0010] A control device is installed on the connecting gas line to control the opening and closing of the connecting gas line.

[0011] Optionally, the gas source includes a gas storage container and a pressure regulating device, the pressure regulating device being used to control the gas pressure in the gas storage container, and the control device including a control valve for controlling the on / off state of the gas connection.

[0012] Optionally, the connecting gas path includes a first connecting gas path connecting the first chamber and a second connecting gas path connecting the second chamber, and the control device includes a first control valve disposed on the first connecting gas path and a second control valve disposed on the second connecting gas path.

[0013] Optionally, the connecting gas path is connected to the first chamber, the resistor assembly further includes a housing and an elastic reset member, the resistor and the slider are installed in the housing, the elastic reset member is disposed in the first chamber or the second chamber, and one end supports the slider and the other end is connected to the housing.

[0014] Optionally, the gas source includes a gas storage container, and the control device includes a gas pump disposed on the connecting gas line, the gas pump being used to pump or draw gas.

[0015] Optionally, the connecting air path includes a first connecting air path connecting the first chamber and a second connecting air path connecting the second chamber, and the air pump includes a first pump body disposed on the first connecting air path and a second pump body disposed on the second connecting air path.

[0016] Optionally, the connecting gas path includes a main gas path connecting the gas storage container, a first connecting gas path connecting the main gas path and the first chamber, and a second connecting gas path connecting the main gas path and the second chamber. The gas pump is disposed on the main gas path. The control device further includes a first control valve disposed on the first connecting gas path and a second control valve disposed on the second connecting gas path.

[0017] Optionally, the connecting gas path is connected to the first chamber, the resistor assembly further includes a housing and an elastic reset member, the resistor and the slider are installed in the housing, the elastic reset member is disposed in the first chamber or the second chamber, and one end supports the slider and the other end is connected to the housing.

[0018] Optionally, the elastic reset element is a compression spring, and both the compression spring and the outer shell are made of insulating material.

[0019] Optionally, an elastic seal is provided between the slider and the inner wall of the resistor.

[0020] The technical solution provided by this utility model has the following advantages:

[0021] This invention provides a pneumatically adjustable resistor, comprising a gas source, a resistor assembly, external wiring, a connecting air path, and a control device. In the resistor assembly, a cylindrical resistor body extends along a first direction, and a slider is slidably mounted within the resistor body along the first direction, dividing it into a first chamber and a second chamber. The external wiring includes a first line connected to the slider and a second line connected to one end of the resistor body. The connecting air path connects the gas source to at least one of the first and second chambers. The control device controls the opening and closing of the connecting air path, using pneumatic pressure to drive the slider to move, thereby changing the resistance value of the resistor body connected to the circuit. In the embodiments provided by this invention, pneumatic drive replaces traditional mechanical transmission, avoiding manual operation. The structure is simple and reliable, suitable for harsh environments, and compared to existing motor-driven solutions, the structure is simpler and more stable, solving the problems of inconvenient adjustment and poor environmental adaptability of existing resistors. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a structure of an embodiment of the pneumatically adjustable resistor provided by this utility model;

[0024] Figure 2 A schematic diagram of the air circuit structure of the first embodiment of the pneumatic pressure regulating resistor provided by this utility model;

[0025] Figure 3 A schematic diagram of the air circuit structure of the second embodiment of the pneumatic pressure regulating resistor provided by this utility model;

[0026] Figure 4 A schematic diagram of the air circuit structure of the third embodiment of the pneumatic pressure regulating resistor provided by this utility model;

[0027] Figure 5 A schematic diagram of the air circuit structure of the fourth embodiment of the pneumatic pressure regulating resistor provided by this utility model;

[0028] Figure 6 A schematic diagram of the air circuit structure of the fifth embodiment of the air pressure regulating resistor provided by this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Gas source; 11-Gas storage container; 12-Pressure regulating device; 20-Resistor assembly; 21-Resistor element; 22-Sliding plate; 23-First chamber; 24-Second chamber; 25-Outer shell; 26-Elastic reset element; 30-External wiring; 31-First wiring; 32-Second wiring; 40-Connecting air path; 41-First connecting air path; 42-Second connecting air path; 43-Main air path; 50-Control device; 51-Control valve; 511-First control valve; 512-Second control valve; 52-Air pump; 521-First pump body; 522-Second pump body. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] Please see Figures 1 to 6 This utility model provides a pneumatically adjustable resistor 1. Please refer to [link / reference]. Figure 1 The resistor includes a gas source 10, a resistor assembly 20, an external circuit 30, a connecting gas path 40, and a control device 50. The resistor assembly 20 includes a resistor body 21 and a slider 22. The resistor body 21 is cylindrically arranged extending along a first direction. The slider 22 is slidably mounted within the resistor body 21 along the first direction to separate and form a first chamber 23 and a second chamber 24 arranged sequentially along the first direction. The external circuit 30 is electrically connected via a first line 31 connected to the slider 22 and a second line 32 connected to one end of the resistor body 21. The connecting gas path 40 connects the gas source 10 to at least one of the first chamber 23 and the second chamber 24. The control device 50 controls the opening and closing of the connecting gas path 40 to control the air pressure driving the slider 22 to slide relative to the resistor body 21.

[0034] In practice, the gas source 10 provides an inert gas (such as nitrogen). After the control device 50 is activated, the gas enters the first chamber 23 and / or the second chamber 24, pushing the slider 22 to slide and changing the length of the resistor 21 connected to the circuit to adjust the resistance value. For example, when the gas enters the first chamber 23, the slider 22 moves towards the second chamber 24, increasing the resistance value, and vice versa. The gas source 10 can also be bottled compressed gas or an external pipeline, and the gas connection 40 can connect the chambers in one or two directions. In this embodiment, the displacement of the slider 22 is driven by changes in air pressure, changing the resistance value of the resistor 21 connected to the circuit. By replacing traditional mechanical transmission with air pressure drive, manual operation is avoided. The structure is simple and reliable, suitable for harsh environments. Compared with existing motor drive solutions, the structure is simpler and more stable, solving the problems of inconvenient adjustment and poor environmental adaptability of existing resistors.

[0035] It is understood that a sealing structure should be provided between the slider 22 and the resistor 21 to isolate the first chamber 23 and the second chamber 24. In this embodiment, an elastic seal is provided between the slider 22 and the inner wall of the resistor 21. Specifically, the elastic seal can be a rubber sealing ring, a polytetrafluoroethylene ring, etc., which can be installed on the outer periphery of the slider 22 and form an airtight seal by making close contact with the inner wall of the resistor 21. In this embodiment, the elastic seal is used to fill the gap by deformation and prevent gas leakage, so that the air pressure can effectively act on the slider 22, ensuring high airtightness between the first chamber 23 and the second chamber 24, ensuring air pressure driving efficiency, avoiding adjustment failure, and reducing the entry of dust and liquid to protect internal components and extend service life.

[0036] Based on the previous embodiment, please continue to refer to... Figure 2 and Figure 3 In an optional embodiment, the gas source 10 further includes a gas storage container 11 and a pressure regulating device 12. The pressure regulating device 12 is used to control the gas pressure in the gas storage container 11, and the control device 50 includes a control valve 51 that controls the opening and closing of the gas connection 40. In this embodiment, the gas storage container 11 stores inert gas at a certain pressure, the pressure regulating device 12 (such as a pressure reducing valve) regulates the output gas pressure, and the control valve 51 is installed on the gas connection 40 to control the opening and closing of the gas supply. For example, the pressure regulating device 12 is set to output a constant gas pressure. After the control valve 51 is opened, the gas pushes the slider 22 to the corresponding position with a constant pressure to achieve quantitative resistance adjustment. The pressure regulating device 12 can also be an electric pressure regulating valve that adjusts the pressure in real time through an electronic control signal, and the control valve 51 can be a solenoid valve. Thus, by limiting the pressure of the gas source 10 through the pressure regulating device 12 and controlling the opening and closing of the gas path with the control valve 51, the resistance adjustment is made to correspond to the gas pressure, thereby accurately controlling the moving distance of the slider 22 to achieve precise resistance adjustment. The gas storage container 11 provides a stable gas source 10 to ensure the stability and repeatability of the adjustment process.

[0037] Furthermore, such as Figure 2As shown, in the first embodiment provided by this utility model, the connecting gas path 40 includes a first connecting gas path 41 connecting the first chamber 23 and a second connecting gas path 42 connecting the second chamber 24. The control device 50 includes a first control valve 511 disposed on the first connecting gas path 41 and a second control valve 512 disposed on the second connecting gas path 42. In specific implementation, the first connecting gas path 41 and the second connecting gas path 42 are independently controlled. When the first control valve 511 is opened, gas enters the first chamber 23 and pushes the slide plate 22 to move towards the second chamber 24. When the second control valve 512 is opened, gas enters the second chamber 24 and pushes the slide plate 22 to move in the opposite direction. When both valves are closed, the slide plate 22 remains in its original position. Preferably, a one-way valve can also be added to the connecting gas path 40 to prevent gas backflow or to connect the two chambers to different pressure gas sources 10 for pressure differential drive.

[0038] In the first embodiment, by independently controlling the air intake state of the first chamber 23 and the second chamber 24, the slider 22 is moved bidirectionally and its position is precisely controlled by utilizing the air pressure difference. This bidirectional drive allows the slider 22 to be adjusted within the full stroke range of the resistor 21, expanding the resistance adjustment range and improving adjustment flexibility to meet the resistance change requirements in different directions.

[0039] In the optional second embodiment, please refer to [reference needed]. Figure 1 and Figure 3 The connecting air passage 40 is only connected to the first chamber 23. The resistor assembly 20 also includes a housing 25 and an elastic reset member 26. The resistor 21 and the slider 22 are installed in the housing 25. The elastic reset member 26 is disposed in the first chamber 23 or the second chamber 24, and one end supports the slider 22, while the other end is connected to the housing 25.

[0040] Specifically, the outer shell 25 encloses all internal components. An elastic reset element 26 (preferably a compression spring) is located in the first chamber 23 or the second chamber 24. When the air passage is open, the air pressure in the first chamber 23 pushes the slider 22 to compress the spring. When the air passage is closed, the spring force causes the slider 22 to reset. For example, in its normal state, the spring keeps the slider 22 at one end of the resistor 21. When air pressure is introduced, the slider 22 moves; when the pressure is lost, the spring resets. In this embodiment, air pressure overcomes the spring force to drive the slider 22, and the spring force resets it after the air passage is disconnected, forming a "air pressure driven - spring force reset" mechanism. The advantage is that the elastic reset element 26 simplifies the reset structure and reduces costs.

[0041] Preferably, the elastic reset element 26 is a compression spring, and both the compression spring and the outer shell 25 are made of insulating materials. In implementation, the two ends of the compression spring abut against the slider 22 and the outer shell 25. When the air pressure pushes the slider 22, the compression spring is compressed and stores potential energy. After the pressure is lost, the potential energy is released to reset. The outer shell 25 and the compression spring are made of insulating materials (such as engineering plastics, ceramics, etc.) to avoid short circuits, ensure electrical safety, and avoid conductive failures. The compression spring has a simple structure and a stable reset force to ensure the reliability and repeatability of adjustment.

[0042] In another alternative implementation, please refer to Figures 4 to 6 The gas source 10 includes a gas storage container 11, and the control device 50 includes a gas pump 52 installed on the connecting gas path 40. The gas pump 52 is used to pump or draw gas.

[0043] In this embodiment, the gas source 10 is a gas storage container 11, and the control device 50 is equipped with a gas pump 52 to pump the gas. During implementation, the gas storage container 11 stores atmospheric pressure gas, and the gas pump 52 pumps the gas into the chambers through suction or compression. For example, when pumping gas into the first chamber 23, it pushes the slide vane 22 to move. After the pump stops, the chamber maintains the gas pressure and fixes the position of the slide vane 22. When pumping into the second chamber 24 in the reverse direction, the slide vane 22 moves in the opposite direction. The gas pump 52 can also be a bidirectional pump or a gas storage tank can be added to the gas path to stabilize the gas pressure. In this embodiment, the gas pump 52 is controlled to actively generate a pressure difference to drive the slide vane 22, and the position of the slide vane 22 is adjusted by controlling the start, stop, and direction of the pump. Thus, adjustment can be achieved under low-pressure gas source 10, adapting to scenarios where the gas source 10 pressure is insufficient, and the active pumping makes the adjustment more sensitive and dynamically continuous.

[0044] Based on the previous embodiment, further in the third embodiment provided by this utility model, such as Figure 4 As shown, the connecting air passage 40 includes a first connecting air passage 41 connecting the first chamber 23 and a second connecting air passage 42 connecting the second chamber 24. The air pump 52 includes a first pump body 521 disposed on the first connecting air passage 41 and a second pump body 522 disposed on the second connecting air passage 42.

[0045] In practice, each of the two pumps pumps gas into the corresponding first chamber 23 and / or second chamber 24. When the first pump 521 operates, it pushes the slide vane 22 to move towards the second chamber 24. When the second pump 522 operates, it pushes the slide vane 22 to move in the opposite direction. The simultaneous operation of the two pumps balances the gas pressure, keeping the slide vane 22 stationary. In this embodiment, by independently controlling the gas pressure in the two chambers using the first pump 521 and the second pump 522, the position of the slide vane 22 is precisely adjusted using the pressure difference. This makes the movement of the slide vane 22 smoother, allows for controllable adjustment rate, and avoids gas crosstalk, thereby improving adjustment accuracy and reliability.

[0046] Optionally, in the fourth embodiment provided by this utility model, as Figure 5 As shown, the connecting gas path 40 includes a main gas path 43 connecting the gas storage container 11, a first connecting gas path 41 connecting the main gas path 43 and the first chamber 23, and a second connecting gas path 42 connecting the main gas path 43 and the second chamber 24. The air pump 52 is disposed on the main gas path 43. The control device 50 also includes a first control valve 511 disposed on the first connecting gas path 41 and a second control valve 512 disposed on the second connecting gas path 42.

[0047] In practical implementation, the main gas path 43 connects the gas storage container 11 and the gas pump 52. The first connecting gas path 41 and the second connecting gas path 42 branch off from the main gas path 43 to the chambers, respectively. The gas pump 52 continuously generates pressure and introduces gas into the chambers by opening the corresponding control valve 51. For example, when the first control valve 511 is opened, gas enters the first chamber 23 and drives the slide vane 22. When the second control valve 512 is switched, the slide vane 22 moves in the opposite direction. In this way, a single pump drives dual-chamber control by providing a continuous gas source 10 through the gas pump 52 and switching the gas flow direction through the control valve 51. The advantages are that the single pump structure reduces costs, the control valve 51 enables bidirectional adjustment to simplify the gas path layout, and the design of the main gas path 43 facilitates unified gas pressure management and improves system integration.

[0048] Optionally, in the fifth embodiment provided by this utility model, please refer to the following: Figure 1 and Figure 6 The connecting air passage 40 is only connected to the first chamber 23. The resistor assembly 20 also includes a housing 25 and an elastic reset member 26. The resistor 21 and the slider 22 are installed in the housing 25. The elastic reset member 26 is disposed in the first chamber 23 or the second chamber 24, and one end supports the slider 22, while the other end is connected to the housing 25.

[0049] In this embodiment, when the air pump 52 pumps gas into the first chamber 23, it pushes the slide 22 to compress the spring. After the pump stops, the spring force causes the slide 22 to reset. Preferably, a pressure relief valve can be added to the air path to accelerate the reset. In this way, the air pump 52 provides air pressure to overcome the spring force and drive the slide 22. After the pressure is lost, the spring force resets the slide 22, forming a unidirectional drive cycle. The advantages are that the single air path design simplifies the structure and reduces the risk of air leakage. The elastic reset component 26 ensures reset after pressure loss to improve safety, and the outer shell 25 enhances the protective performance.

[0050] Ideally, the elastic reset element 26 is a compression spring, and both the compression spring and the outer casing 25 are made of insulating material. Its specific operation and beneficial effects can be found in the aforementioned second embodiment, and will not be repeated here.

[0051] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A pressure-regulated resistor, characterized in that, include: Gas source, used to provide inert gas; A resistor assembly includes a resistor body and a slider. The resistor body is arranged in a cylindrical shape extending along a first direction, and the slider is slidably mounted in the resistor body along the first direction to separate and form a first chamber and a second chamber arranged sequentially along the first direction. The external circuit includes a first circuit connected to the slider and a second circuit connected to one axial end of the resistor. A connecting gas path is disposed between the gas source and the resistor assembly, the connecting gas path being connected to the gas source and at least one of the first chamber and the second chamber; as well as, A control device is installed on the connecting gas line to control the opening and closing of the connecting gas line.

2. The pressure-regulating resistor as described in claim 1, characterized in that, The gas source includes a gas storage container and a pressure regulating device. The pressure regulating device is used to control the gas pressure in the gas storage container. The control device includes a control valve that controls the on / off state of the gas connection.

3. The pneumatically adjustable resistor as described in claim 2, characterized in that, The connecting gas path includes a first connecting gas path connecting the first chamber and a second connecting gas path connecting the second chamber. The control device includes a first control valve disposed on the first connecting gas path and a second control valve disposed on the second connecting gas path.

4. The pressure-regulating resistor as described in claim 2, characterized in that, The connecting gas path is connected to the first chamber. The resistor assembly also includes a housing and an elastic reset member. The resistor and the slider are installed in the housing. The elastic reset member is disposed in the first chamber or the second chamber, and one end supports the slider and the other end is connected to the housing.

5. The pressure-regulating resistor as described in claim 1, characterized in that, The gas source includes a gas storage container, and the control device includes a gas pump installed on the connecting gas line, the gas pump being used to pump or draw gas.

6. The pneumatically adjustable resistor as described in claim 5, characterized in that, The connecting air path includes a first connecting air path connecting the first chamber and a second connecting air path connecting the second chamber, and the air pump includes a first pump body disposed on the first connecting air path and a second pump body disposed on the second connecting air path.

7. The pneumatically adjustable resistor as described in claim 5, characterized in that, The connecting gas path includes a main gas path connecting the gas storage container, a first connecting gas path connecting the main gas path and the first chamber, and a second connecting gas path connecting the main gas path and the second chamber. The gas pump is disposed on the main gas path. The control device further includes a first control valve disposed on the first connecting gas path and a second control valve disposed on the second connecting gas path.

8. The pressure-regulating resistor as described in claim 5, characterized in that, The connecting gas path is connected to the first chamber. The resistor assembly also includes a housing and an elastic reset member. The resistor and the slider are installed in the housing. The elastic reset member is disposed in the first chamber or the second chamber, and one end supports the slider and the other end is connected to the housing.

9. The pressure-regulating resistor as described in claim 4 or 8, characterized in that, The elastic reset component is a compression spring, and both the compression spring and the outer shell are made of insulating material.

10. The pressure-regulating resistor as described in any one of claims 1 to 8, characterized in that, An elastic seal is provided between the slider and the inner wall of the resistor.

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