Valve position detection device

Abstract

The utility model relates to a valve position detection device, which belongs to the technical field of position feedback switch touch devices and comprises a cylinder, a valve rod, a slide rail and a displacement detection module. A piston rod is arranged in the cylinder and reciprocates relative to the cylinder along the central axis direction of the cylinder; the valve rod is arranged at the end, away from the valve body, of the valve and connected with the piston rod. The valve rod and the piston rod are coaxially arranged and used for opening or closing the valve along with reciprocating motion of the piston rod. The sliding rail is parallel to the valve rod. The first end of the sliding rail is fixedly connected with the air cylinder. And the displacement detection module is arranged on the sliding rail, is in sliding connection with the sliding rail, is fixedly connected with the valve rod and is used for detecting displacement data of the valve rod in real time. According to the valve position detection device, the displacement data of the valve rod are detected in real time through the displacement detection module, the state of the valve can be accurately judged, and the reliability and accuracy of valve position detection are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of position feedback switch actuating devices, and in particular relates to a valve position detection device. Background Art

[0002] The production of carbon black uses coal tar as raw material and potassium carbonate as auxiliary material. Incomplete combustion occurs at a high temperature of 2000℃ in the reactor to generate carbon black tail gas, which is eventually divided into two paths. One path enters the main bag filter and is filtered to generate carbon black products; the other path enters the venting washing tower, which is used to vent the carbon black tail gas in an emergency. The main bag filter and the venting washing tower are both equipped with valves. The switch status of the valve is linked to the entire production line. When the DCS (distributed control system) detects that the valve of the venting washing tower is open, it automatically triggers the production line to stop the chain.

[0003] At present, the valve 4 state is detected by a mechanical stroke feedback switch, such as Figure 1 As shown, the cylinder 1 controls the piston rod 2 to move up and down, the piston rod 2 is connected to the valve stem 3, and the valve stem 3 is connected to the valve 4 used to seal the valve body 5; when the piston rod 2 moves upward, it drives the valve stem 3 and the valve 4 to move in sequence to open the valve 4; when the piston rod 2 moves downward, it drives the valve stem 3 and the valve 4 to move in sequence to close the valve 4; the first stroke switch 601 and the second stroke switch 602 detect the movement of the valve stem 3 through the stroke rod 603 to detect whether the valve 4 is fully opened or fully closed. When the valve 4 of the venting washing tower is fully opened, the DCS parking interlock is triggered. However, the first stroke switch 601 and the second stroke switch 602 are mechanical stroke feedback switches. They will only send an opening or closing signal when the valve stem 3 moves to a certain extent, and there are only opening or closing signals; their reliability is low, and the probability of malfunction causing the production line to stop increases, and the production line stop will cause irreversible damage to the equipment and cause huge economic losses.

[0004] Therefore, how to provide a reliable valve position detection device is a technical problem that urgently needs to be solved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a valve position detection device, which detects the displacement data of the valve stem in real time through a displacement detection module, can accurately determine the state of the valve, avoids the error of mechanical feedback switch, and improves the reliability and accuracy of valve position detection.

[0006] The utility model provides a valve position detection device, comprising:

[0007] A cylinder, wherein a piston rod is arranged in the cylinder, and the piston rod reciprocates relative to the cylinder along the center axis of the cylinder;

[0008] The valve stem is arranged at the end of the valve away from the valve body and connected to the piston rod; the valve stem is arranged coaxially with the piston rod and is used to open or close the valve with the reciprocating motion of the piston rod;

[0009] A slide rail is arranged parallel to the valve stem, and a first end of the slide rail is fixedly connected to the cylinder;

[0010] The displacement detection module is arranged on the slide rail and is slidably connected to the slide rail. The displacement detection module is fixedly connected to the valve stem and is used for real-time detection of the displacement data of the valve stem.

[0011] This technical solution detects the displacement data of the valve stem in real time through the displacement detection module, can accurately determine the state of the valve, avoids the error of mechanical feedback switch, and improves the reliability and accuracy of valve position detection.

[0012] In some embodiments, the valve position detection device further includes a signal conversion module, which is installed at one end of the slide rail close to the cylinder and is used to output a valve state signal according to the displacement data obtained by the displacement detection module. This technical solution converts the displacement data obtained by the displacement detection module into a valve state signal through the setting of the signal conversion module, thereby improving the automation degree and response speed of the device.

[0013] In some embodiments, the displacement data is obtained according to the relative displacement of the displacement detection module relative to the slide rail; when the valve is tight, the relative displacement of the displacement detection module and the slide rail is recorded as 0; when the valve stem moves away from the valve body to the limit position, the relative displacement of the displacement detection module and the slide rail is recorded as 100%; the displacement detection module outputs 0-100% relative displacement data in real time. The relative displacement data of the technical solution accurately reflects the opening and closing degree of the valve.

[0014] In some embodiments, when the relative displacement data is less than a preset value, the signal conversion module outputs a valve state signal as a closed signal; when the relative displacement data is greater than or equal to the preset value, the signal conversion module outputs a valve state signal as an open signal. This technical solution achieves clear judgment of the valve state and reduces misjudgment and malfunction by setting a preset value.

[0015] In some embodiments, the slide rail includes a variable resistance slide rail, the displacement detection module includes a magnetic ring, and the signal conversion module includes a signal conditioning circuit. This technical solution has strong adaptability and flexibility, and meets the detection requirements under different working conditions.

[0016] In some embodiments, the valve position detection device further includes a connecting rod, one end of which is connected to the valve stem, and the other end is connected to the displacement detection module, for fixedly connecting the displacement detection module to the valve stem. This technical solution ensures that the displacement detection module accurately follows the movement of the valve stem through the setting of the connecting rod, thereby improving the accuracy and reliability of displacement detection.

[0017] In some embodiments, the valve position detection device further includes a fixing member for fixing the slide rail, the fixing member is installed at the first end of the slide rail and is fixedly connected to the cylinder. This technical solution stabilizes the position of the slide rail and ensures the fixed connection between the slide rail and the cylinder through the setting of the fixing member, thereby further improving the stability and reliability of the entire valve position detection device.

[0018] Based on the above scheme, the valve position detection device in the embodiment of the utility model detects the displacement data of the valve stem in real time through the displacement detection module, can accurately judge the state of the valve, avoids the error of the mechanical feedback switch, and improves the reliability and accuracy of the valve position detection, thereby reducing the possibility of production line stoppage due to false operation and reducing the risk of economic loss due to equipment damage; and has strong adaptability and flexibility to meet the detection needs under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the application of a mechanical travel feedback switch in the prior art;

[0021] Figure 2 It is a structural schematic diagram of the valve position detection device of the utility model.

[0022] In the figure:

[0023] 1. Cylinder; 2. Piston rod; 3. Valve stem; 4. Valve; 5. Valve body;

[0024] 601, first travel switch; 602, second travel switch; 603, travel rod;

[0025] 701, fixing part; 702, signal conversion module; 703, displacement detection module; 704, slide rail; 705, connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The terms "device", "unit" and "module" used in this document are a method for distinguishing different components, elements, parts, portions or assemblies at different levels, and these terms may be replaced by other expressions that can achieve the same purpose.

[0031] like Figure 2As shown, in one embodiment of the valve position detection device of the utility model, the valve position detection device includes a cylinder 1, a valve stem 3, a slide rail 704 and a displacement detection module 703; wherein a piston rod 2 is provided inside, and the piston rod 2 reciprocates relative to the cylinder 1 along the central axis direction of the cylinder 1; the valve stem 3 is arranged at the end of the valve 4 away from the valve body 5, and is connected to the piston rod 2; the valve stem 3 is coaxially arranged with the piston rod 2, and is used to open or close the valve 4 with the reciprocating motion of the piston rod 2; the slide rail 704 is arranged parallel to the valve stem 3, and the first end of the slide rail 704 is fixedly connected to the cylinder 1; the displacement detection module 703 is arranged on the slide rail 704 and is slidably connected to the slide rail 704, and the displacement detection module 703 is fixedly connected to the valve stem 3, and is used to detect the displacement data of the valve stem 3 in real time.

[0032] In the above-mentioned schematic embodiment, the valve position detection device detects the displacement data of the valve stem 3 in real time through the displacement detection module 703, can accurately determine the state of the valve 4, avoids the error of the mechanical feedback switch, and improves the reliability and accuracy of the valve 4 position detection, thereby reducing the possibility of production line stoppage due to false operation and reducing the risk of economic losses caused by equipment damage.

[0033] In some embodiments, Figure 2 As shown, the valve position detection device also includes a signal conversion module 702, which is installed at one end of the slide rail 704 close to the cylinder 1, and is used to output a valve 4 state signal according to the displacement data obtained by the displacement detection module 703. Through the setting of the signal conversion module 702, the displacement data obtained by the displacement detection module 703 is converted into a valve 4 state signal, thereby improving the automation degree and response speed of the device. As an illustrative embodiment, the signal conversion module 702 is connected to the DCS system for communication, and the DCS system monitors and controls the valve 4 state in real time according to the valve 4 state signal output by the signal conversion module 702.

[0034] In some embodiments, Figure 2 As shown, the displacement data is obtained according to the relative displacement of the displacement detection module 703 relative to the slide rail 704; when the valve 4 is tight, the relative displacement of the displacement detection module 703 and the slide rail 704 is recorded as 0; when the valve stem 3 moves away from the valve body 5 to the limit position, the relative displacement of the displacement detection module 703 and the slide rail 704 is recorded as 100%; the displacement detection module 703 outputs 0-100% relative displacement data in real time. The opening and closing degree of the valve 4 is accurately reflected through the relative displacement data.

[0035] Furthermore, if Figure 2As shown, when the relative displacement data is less than the preset value, the signal conversion module 702 outputs the valve 4 state signal as a closing signal; when the relative displacement data is greater than or equal to the preset value, the signal conversion module 702 outputs the valve 4 state signal as an opening signal. By setting the preset value, a clear judgment of the valve 4 state is achieved, reducing misjudgment and malfunction. In this embodiment, the preset value is set to 10%.

[0036] In some embodiments, Figure 2 As shown, the slide rail 704 includes a variable resistor slide rail 704, the displacement detection module 703 includes a magnetic ring, and the signal conversion module 702 includes a signal conditioning circuit. In this embodiment, the variable resistor slide rail 704 can provide continuous resistance changes, the magnetic ring can accurately sense displacement changes, and the signal conditioning circuit converts these changes into stable electrical signals, thereby improving the accuracy of displacement detection; the design of the variable resistor slide rail 704 and the magnetic ring is suitable for various environmental conditions, and the signal conditioning circuit can be adjusted according to different application requirements, with strong adaptability and flexibility, meeting the detection requirements under different working conditions.

[0037] In some embodiments, Figure 2 As shown, the valve position detection device further includes a connecting rod 705, one end of which is connected to the valve stem 3, and the other end is connected to the displacement detection module 703, and is used to fix the displacement detection module 703 to the valve stem 3. By setting the connecting rod 705, it is ensured that the displacement detection module 703 accurately follows the movement of the valve stem 3, thereby improving the accuracy and reliability of displacement detection and avoiding detection errors caused by looseness or misalignment.

[0038] In some embodiments, Figure 2 As shown, the valve position detection device further includes a fixing member 701 for fixing the slide rail 704, and the fixing member 701 is installed at the first end of the slide rail 704 and fixedly connected to the cylinder 1. By setting the fixing member 701, the position of the slide rail 704 is stabilized, and the fixed connection between the slide rail 704 and the cylinder 1 is ensured, so as to further improve the stability and reliability of the entire valve position detection device and avoid detection errors caused by the movement of the slide rail 704.

[0039] Through the description of multiple embodiments of the valve position detection device of the utility model, it can be seen that the embodiments of the valve position detection device of the utility model have at least one or more of the following advantages:

[0040] 1. The valve position detection device provided by the utility model can accurately determine the state of the valve 4 by detecting the displacement data of the valve stem 3 in real time through the displacement detection module 703, thereby avoiding the error of the mechanical feedback switch and improving the reliability and accuracy of the valve 4 position detection;

[0041] 2. The valve position detection device provided by the utility model converts the displacement data obtained by the displacement detection module 703 into a valve 4 state signal through the setting of the signal conversion module 702, thereby improving the automation degree and response speed of the device;

[0042] 3. The valve position detection device provided by the utility model has strong adaptability and flexibility, and can meet the detection requirements under different working conditions.

[0043] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0044] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A valve position detection device, characterized in that: include: A cylinder, wherein a piston rod is disposed in the cylinder, and the piston rod reciprocates relative to the cylinder along the center axis of the cylinder; A valve stem, which is arranged at one end of the valve away from the valve body and connected to the piston rod; the valve stem is coaxially arranged with the piston rod and is used to open or close the valve with the reciprocating motion of the piston rod; A slide rail, which is arranged parallel to the valve stem, and a first end of the slide rail is fixedly connected to the cylinder; A displacement detection module is disposed on the slide rail and is slidably connected to the slide rail. The displacement detection module is fixedly connected to the valve stem and is used for real-time detection of displacement data of the valve stem.

2. The valve position detection device according to claim 1, characterized in that: It also includes a signal conversion module, which is installed at one end of the slide rail close to the cylinder and is used to output a valve state signal according to the displacement data obtained by the displacement detection module.

3. The valve position detection device according to claim 2, characterized in that: The displacement data is obtained based on the relative displacement of the displacement detection module relative to the slide rail; when the valve is tight, the relative displacement between the displacement detection module and the slide rail is recorded as 0; when the valve stem moves to the extreme position in the direction away from the valve body, the relative displacement between the displacement detection module and the slide rail is recorded as 100%; the displacement detection module outputs 0-100% relative displacement data in real time.

4. The valve position detection device according to claim 3, characterized in that: When the relative displacement data is less than a preset value, the signal conversion module outputs a valve state signal as a closing signal; when the relative displacement data is greater than or equal to the preset value, the signal conversion module outputs a valve state signal as an opening signal.

5. The valve position detection device according to claim 4, characterized in that: The slide rail includes a variable resistance slide rail, the displacement detection module includes a magnetic ring, and the signal conversion module includes a signal conditioning circuit.

6. The valve position detection device according to claim 1, characterized in that: It also includes a connecting rod, one end of which is connected to the valve stem, and the other end of which is connected to the displacement detection module, so as to fix the displacement detection module to the valve stem.

7. The valve position detection device according to claim 1, characterized in that: It also includes a fixing member for fixing the slide rail, wherein the fixing member is installed at the first end of the slide rail and is fixedly connected to the cylinder.

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