Air cylinder control device for analytical instrument

Abstract

The utility model provides an air cylinder control device for an analytical instrument, which belongs to the technical field of control devices, and comprises a three-way electromagnetic valve I and a three-way electromagnetic valve II which are used for controlling the lifting of an air cylinder; the magnet is mounted on a piston in the air cylinder; the magnetic switch is mounted on the outer wall of the air cylinder and used for sensing the position of the piston; and the control panel is used for reading a signal of the magnetic switch and directly driving the three-way electromagnetic valve I and the three-way electromagnetic valve II to act. According to the control device, the lower air cylinder can be actively stopped at the middle position through the arrangement of the three-way electromagnetic valve, parts such as a crucible are prevented from being stressed and abraded, and the control device is simple in structure and operation.

Description

Technical Field

[0001] This utility model relates to the field of control device technology, and in particular to a cylinder control device for analytical instruments. Background Technology

[0002] A carbon-sulfur analyzer is a scientific instrument specifically designed for analyzing carbon and sulfur in samples. It typically involves burning the sample in pure oxygen, converting carbon and sulfur into carbon dioxide and sulfur dioxide, respectively, which are then analyzed using infrared absorption. The combustion process takes place in a crucible or a ceramic boat, and the ignition device can be a tube furnace, electric arc furnace, or high-frequency furnace.

[0003] An oxygen, nitrogen, and hydrogen analyzer is a scientific instrument used to analyze oxygen, nitrogen, and hydrogen elements in materials. Using helium, nitrogen, or argon as carrier gases, the sample is melted in a graphite crucible heated by an electrode pulse furnace under an inert atmosphere, undergoing a series of reactions. Each element is converted into a measurable gaseous component, which is then carried by the carrier gas to an infrared detector and a thermal conductivity detector for quantitative analysis.

[0004] The power air circuit of the aforementioned analytical instrument consists of a pressure reducing valve, a cylinder control valve, a cylinder, and pipelines. After the external air source enters the instrument, it generally needs to be adjusted to the working pressure through the built-in pressure reducing valve to avoid fluctuations in the working pressure due to changes in the external air source. The cylinder control valve (also known as the power air valve island) generally consists of multiple sets of two-position five-way solenoid valves. Under the control of the electrical system, each set of two-position five-way valves can independently control one cylinder to achieve reciprocating action.

[0005] A typical cylinder has two working states: the cylinder rod fully extended and fully retracted. However, some instruments require the cylinder to be in an intermediate working position to complete necessary operations. For example, in a carbon-sulfur analyzer, the cylinder needs to be stopped at... Figure 1 There are three locations in the middle to enable the automatic cleaning function.

[0006] The existing control method involves extending the upper cylinder and pressing the oxygen lance against the crucible. Under the pressure of the upper cylinder, the lower cylinder is compressed, thus stopping at position three.

[0007] On the one hand, such as Figure 1 As shown, this implementation method requires the participation of the upper cylinder, and the crucible, oxygen lance, and other components are subjected to stress, which may lead to some wear. Furthermore, this method also requires complex control devices and corresponding control processes. For example, when the lower cylinder is compressed, the gas inside it is also compressed, thus increasing the cylinder's output. To avoid this, a dedicated lower cylinder control device is needed to unload the pressure in the lower cylinder. This is typically achieved using a pressure-reducing valve with a pressure relief function, or by actively cutting off the gas supply to the lower cylinder. Utility Model Content

[0008] In view of this, in order to provide a simple cylinder control device to solve the above-mentioned shortcomings caused by the complex control devices of existing analytical instruments, this utility model provides a cylinder control device for analytical instruments. By setting a three-way solenoid valve, the lower cylinder can be actively stopped in the middle position to avoid stress and wear on parts such as crucibles. Moreover, the control device is simple in structure and operation.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A cylinder control device for an analytical instrument, comprising:

[0011] Three-way solenoid valve one and three-way solenoid valve two are used to control the lifting and lowering of the cylinder;

[0012] A magnet is mounted on the piston in the cylinder;

[0013] A magnetic switch is installed on the outer wall of the cylinder to sense the position of the piston;

[0014] The control board is used to read the signal from the magnetic switch and directly drive the three-way solenoid valve one and the three-way solenoid valve two to operate.

[0015] Preferably, the analytical instrument is a carbon-sulfur analyzer or an oxygen-nitrogen-hydrogen analyzer.

[0016] Preferably, the three-way solenoid valve one and the three-way solenoid valve two are replaced by a three-position five-way valve.

[0017] Compared with the prior art, this utility model has the following beneficial effects:

[0018] The analytical instrument cylinder control device provided by this utility model can actively stop the lower cylinder in the middle position by setting a three-way solenoid valve, so as to avoid the crucible and other parts being subjected to force and wear. Moreover, the control device is simple in structure and operation.

[0019] This cylinder control device achieves precise control of cylinder movement through a three-way solenoid valve, ensuring appropriate clamping force between the oxygen lance and the crucible and preventing wear caused by excessive pressure. Furthermore, the use of a three-way solenoid valve allows the cylinder to automatically stop when it reaches the intermediate position, eliminating the need for additional mechanical limit devices and simplifying the overall control system structure. This simplified design not only reduces costs but also improves system reliability and ease of maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the control device of an existing analytical instrument;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the three-position five-way valve used in this utility model;

[0023] In the diagram: 1. Three-way solenoid valve one; 2. Three-way solenoid valve two; 3. Cylinder; 4. Magnetic switch; 5. Control board; 6. Solenoid coil one; 7. Solenoid coil two. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 2 As shown, this utility model provides a control device for a cylinder 3 in an analytical instrument, comprising:

[0028] Three-way solenoid valve 1 and three-way solenoid valve 2 are used to control the lifting and lowering of cylinder 3; a magnet is installed on the piston in cylinder 3.

[0029] A magnetic switch 4 is installed on the outer wall of the cylinder 3 to sense the position of the piston.

[0030] The control board 5 is used to read the signal from the magnetic switch 4 and directly drive the three-way solenoid valve 1 and the three-way solenoid valve 2 to operate.

[0031] The analytical instrument cylinder 3 control device provided by this utility model, when the three-way solenoid valve 1 is energized and the three-way solenoid valve 2 is de-energized, the piston of cylinder 3 will move along... Figure 2 The piston of cylinder 3 moves downwards; when the three-way solenoid valve 2 is energized and the three-way solenoid valve 1 is de-energized, the piston of cylinder 3 will move downwards. Figure 2 The cylinder moves in the upward direction; when both the three-way solenoid valve 1 and the three-way solenoid valve 2 are de-energized, the cylinder 3 stops moving.

[0032] The cylinder 3 control device provided by this invention enables the cylinder 3 in the analytical instrument to move with high flexibility and precision. By controlling the energization and de-energization of the solenoid valve, the movement direction and stopping position of the piston in cylinder 3 can be precisely controlled, thereby achieving efficient and accurate operation of the analytical instrument. At the same time, this control device has a simple structure and is easy to operate, contributing to improved working efficiency and performance of the analytical instrument.

[0033] This utility model, through the logic circuit on the control board 5, can switch between the following four working states according to the settings of the host computer software:

[0034] (1) When cylinder 3 descends to the middle position, the three-way solenoid valve 1 is energized. When the control board 5 detects the signal from the magnetic switch 4 (indicating that cylinder 3 has reached the middle position), it immediately cuts off the power supply to the three-way solenoid valve 1, and cylinder 3 stops at the middle position.

[0035] (2) When cylinder 3 descends to the lowest position, control board 5 blocks the signal from magnetic switch 4, three-way solenoid valve 1 remains energized, and cylinder 3 stops at the lowest position.

[0036] (3) When cylinder 3 rises to the middle position, the three-way solenoid valve 2 is energized. When the control board 5 detects the signal from the magnetic switch 4 (indicating that cylinder 3 has reached the middle position), it immediately cuts off the power supply to the three-way solenoid valve 2, and cylinder 3 stops at the middle position.

[0037] (4) When cylinder 3 rises to the highest position, control board 5 blocks the signal from magnetic switch 4, three-way solenoid valve 2 remains energized, and cylinder 3 stops at the highest position.

[0038] Magnetic switch 4 is used to detect the position of cylinder 3 and transmit the signal to control board 5 to ensure that cylinder 3 can accurately stop at the set position. The implementation of the cylinder 3 control device of the analytical instrument provided by this utility model improves the working efficiency and accuracy of the analytical instrument.

[0039] In this invention, the analytical instrument is a carbon-sulfur analyzer or an oxygen-nitrogen-hydrogen analyzer.

[0040] In this invention, the three-way solenoid valve 1 and the three-way solenoid valve 2 are replaced by a three-position five-way valve. The three-position five-way valve has five channels and three working positions, allowing for more flexible control of the cylinder 3's on / off state and direction of movement. In this new configuration, the three-position five-way valve replaces the original three-way solenoid valve 1 and the three-way solenoid valve 2, thus achieving control of the cylinder 3.

[0041] Two-position solenoid valves are the most widely used type. Figure 2 The three-way valve shown is of this type. "Two-position" means the valve core has two working positions, corresponding to two states of the solenoid valve. A three-position five-way solenoid valve, on the other hand, has three working positions, meaning it has three states. To achieve this control method, a "three-position" solenoid valve is generally equipped with two solenoid coils, namely solenoid coil 6 and solenoid coil 7 in the diagram. For this invention, solenoid coil 6 functions as equivalent to (two-position) three-way solenoid valve 1, and solenoid coil 7 functions as equivalent to (two-position) three-way solenoid valve 2; the functions of other parts are completely identical.

[0042] like Figure 3 As shown, this utility model provides a control device for a cylinder 3 in an analytical instrument, comprising:

[0043] Electromagnetic coil 6 and electromagnetic coil 7 are used to control the lifting and lowering of cylinder 3; a magnet is installed on the piston in cylinder 3.

[0044] A magnetic switch 4 is installed on the outer wall of the cylinder 3 to sense the position of the piston.

[0045] The control board 5 is used to read the signal from the magnetic switch 4 and directly drive the electromagnetic coil 6 and electromagnetic coil 2 to operate.

[0046] The analytical instrument cylinder 3 control device provided by this utility model, when the first electromagnetic coil 6 is energized and the second electromagnetic coil 7 is de-energized, the piston of the cylinder 3 will move along... Figure 2 The piston of cylinder 3 moves downwards; when the three-way solenoid valve 2 is energized and the solenoid coil 6 is de-energized, the piston of cylinder 3 will move along... Figure 2 The cylinder moves in the upward direction; when both electromagnetic coil 6 and electromagnetic coil 7 are de-energized, cylinder 3 stops moving.

[0047] When the three-position five-way valve is in a specific working position, it can connect a certain channel to the cylinder 3, control the entry and exit of gas in the cylinder 3, and thus push the piston to move in the cylinder 3.

[0048] By changing the working position of the three-position five-way valve, the direction and on / off state of the airflow can be flexibly adjusted, controlling the piston of cylinder 3 to move in different directions or stop moving.

[0049] The cylinder 3 control device, utilizing a three-position five-way valve, offers greater flexibility and precision, adapting to more complex cylinder 3 movement requirements. By precisely controlling the operating state of the three-position five-way valve, efficient and accurate operation of the analytical instrument can be achieved, improving its working efficiency and performance.

[0050] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A cylinder control device for an analytical instrument, characterized in that, include: Three-way solenoid valve one and three-way solenoid valve two are used to control the lifting and lowering of the cylinder; A magnet is mounted on the piston in the cylinder; A magnetic switch is installed on the outer wall of the cylinder to sense the position of the piston; The control board is used to read the signal from the magnetic switch and directly drive the three-way solenoid valve one and the three-way solenoid valve two to operate.

2. The cylinder control device for an analytical instrument according to claim 1, characterized in that, The analytical instrument is a carbon-sulfur analyzer or an oxygen-nitrogen-hydrogen analyzer.

3. A cylinder control device for an analytical instrument according to claim 1 or 2, characterized in that, The three-way solenoid valve one and three-way solenoid valve two are replaced by a three-position five-way valve.

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