Cylinder position detection device and detection system

Abstract

The utility model relates to an air cylinder position detection device and system, the air cylinder position detection device comprises an air cylinder and a reed pipe remote transmitter, the air cylinder comprises an air cylinder body extending in the first direction and a piston which is movably arranged in the air cylinder body in the first direction and connected with a piston rod, and a magnetic part is arranged on the piston; the reed pipe remote transmission transmitter comprises a shell which extends in the first direction and is attached to the outer side wall of the air cylinder body, a plurality of magnetic reed switches are arranged in the shell, and when the magnetic force of the magnetic part acts on the magnetic reed switches at different positions, the position of the piston relative to the air cylinder body can be detected through the reed pipe remote transmission transmitter. Through the technical scheme, the cylinder position detection device provided by the utility model can detect the position of the piston relative to the cylinder body through the reed pipe remote transmitter, so that field personnel can accurately judge the current working condition position of the cylinder, and maintenance work or daily maintenance work can be conveniently carried out.

Description

Technical Field

[0001] The present disclosure relates to the technical field of position detection devices, and in particular, to a cylinder position detection device and a detection system. Background Art

[0002] In the related art, when compressed air enters the inlet at either end of the cylinder, a pressure difference is formed between the two chambers inside the cylinder, which can drive the piston in the cylinder to move and link the piston rod connected to the piston to reciprocate linear motion. However, the existing cylinder is usually only provided with two position signal switches: fully open (the cylinder piston moves to the maximum position of its stroke) and fully closed (the cylinder piston moves to the minimum position of its stroke). Due to this arrangement, in the event of abnormal conditions such as control air source pressure relief or valve jamming, on-site personnel will not be able to accurately determine the current working position of the cylinder, which makes it inconvenient for on-site personnel to carry out maintenance work. Utility Model Content

[0003] The purpose of the present disclosure is to provide a cylinder position detection device and detection system, so as to solve the problem in related technologies that on-site personnel are unable to accurately determine the current working position of the cylinder under abnormal conditions such as control air source pressure relief or valve jamming, thereby facilitating on-site personnel's inspection and repair work or daily maintenance work of the cylinder.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a cylinder position detection device, comprising: a cylinder, comprising a cylinder body extending along a first direction, and a piston movably arranged inside the cylinder body along the first direction and connected to a piston rod, the piston being provided with a magnetic part; and a reed switch remote transmitter, comprising a shell extending along the first direction and arranged in contact with the outer wall of the cylinder body, a plurality of reed switches being provided in the shell, and when the magnetic force of the magnetic part acts on the reed switches at different positions, the position of the piston relative to the cylinder body can be detected by the reed switch remote transmitter.

[0005] Optionally, a plurality of the reed switches are arranged at equal intervals along the first direction.

[0006] Optionally, the housing has a first end and a second end arranged opposite to each other along the first direction, the second end is formed with a bent portion extending outward toward the side away from the cylinder body, and the end of the bent portion is provided with a transmitter head for connecting to a remote terminal signal.

[0007] Optionally, a connecting portion for connecting to the outer shell is provided on the outer side wall of the cylinder body.

[0008] Optionally, the connecting portion is configured as a cable tie, and the cable tie is wound around the cylinder body and the housing.

[0009] Optionally, the cable tie is a stainless steel cable tie.

[0010] Optionally, there are multiple cable ties, and the multiple cable ties are arranged at intervals along the first direction.

[0011] Optionally, the magnetic member includes a magnetic ring, which is sleeved on the outer peripheral wall of the piston and is arranged centrally relative to the piston.

[0012] A second aspect of the present disclosure provides a detection system, comprising a remote terminal and the cylinder position detection device provided by the first aspect, wherein the remote terminal is used to connect to the reed switch remote transmitter signal.

[0013] Optionally, the remote terminal is a DCS control system.

[0014] Through the above technical solution, that is, the cylinder position detection device provided by the present invention, the cylinder position detection device is arranged by arranging the shell of a plurality of reed switches inside the reed switch remote transmitter in a fit relationship with the outer wall of the cylinder body of the cylinder. In this way, during the reciprocating linear motion of the piston and the piston rod in the cylinder, the magnetic force of the magnetic part on the piston acts on the reed switches at different positions, and the position of the piston relative to the cylinder body can be detected through the reed switch remote transmitter, so that on-site personnel can accurately judge the current working position of the cylinder, which is convenient for subsequent on-site personnel to carry out maintenance work or daily maintenance work of the cylinder.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a detection system provided in an exemplary embodiment of the present disclosure;

[0018] Figure 2 is a schematic diagram of the principle of a reed switch remote transmitter of a detection system provided in an exemplary embodiment of the present disclosure, wherein all reed switches are in an open state;

[0019] Figure 3 1 is a schematic diagram of the principle of a reed switch remote transmitter of a detection system provided in an exemplary embodiment of the present disclosure, wherein the reed switch is in a closed state under the magnetic force of a magnetic member.

[0020] Description of Reference Numerals

[0021] 1-Cylinder; 110-Cylinder body; 120-Piston rod; 130-Piston; 140-Magnetic part; 141-Magnetic ring; 2-Reed switch remote transmitter; 210-Casing; 211-First end; 212-Second end; 213-Bend; 214-Transmitter head; 220-Reed switch; 230-Resistor; 3-Remote terminal; 4-Connecting part; 410-Cable tie. DETAILED DESCRIPTION

[0022] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0023] In this disclosure, unless otherwise indicated, "inside" and "outside" refer to the inside and outside relative to the outline of a component or structure. Furthermore, it should be noted that the use of terms such as "first" and "second" is intended to distinguish one element from another and does not imply order or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0024] According to a first aspect of the present disclosure, a cylinder position detection device is provided, referring to Figures 1 to 3 As shown, the cylinder position detection device includes a cylinder 1 and a reed switch remote transmitter 2. The cylinder 1 includes a cylinder body 110 extending along a first direction, and a piston 130 movably arranged inside the cylinder body 110 along the first direction and connected to the piston rod 120, and a magnetic member 140 is provided on the piston 130; the reed switch remote transmitter 2 includes a shell 210 extending along the first direction and arranged in contact with the outer wall of the cylinder body 110, and a plurality of reed switches 220 are provided in the shell 210. When the magnetic force of the magnetic member 140 acts on the reed switches 220 at different positions, the position of the piston 130 relative to the cylinder body 110 can be detected by the reed switch remote transmitter 2.

[0025] Through the above technical solution, that is, the cylinder position detection device provided by the present invention, the cylinder position detection device is arranged by placing the housing 210 of the reed switch remote transmitter 2 with multiple reed switches 220 in contact with the outer wall of the cylinder body 110 of the cylinder 1. In this way, during the reciprocating linear motion of the piston 130 and the piston rod 120 in the cylinder 1, the magnetic force of the magnetic part 140 on the piston 130 acts on the reed switches 220 at different positions, and the position of the piston 130 relative to the cylinder body 110 can be detected through the reed switch remote transmitter 2, so that on-site personnel can accurately judge the current working position of the cylinder, which is convenient for subsequent on-site personnel to carry out maintenance work or daily maintenance work of the cylinder.

[0026] It should be noted that the reference Figures 1 to 3 As shown, the working principle of the reed switch remote transmitter 2 is usually based on the opening and closing action of the reed switch 220 (the two reeds of the reed switch) to change the on-off state of the circuit, thereby realizing signal conversion and transmission, and the signal is processed by the conditioning circuit and finally converted into a standard current or voltage signal and output to the remote terminal 3. In this way, after the piston 130 moves to different positions, the magnetic force of the magnetic member 140 on the piston 130 can act on the reed switch 220 at the corresponding position, so that the reed switch 220 at different positions can be in a closed state, thereby enabling the reed switch remote transmitter 2 to output different current or voltage signals to the remote terminal 3. For example, the reed switch remote transmitter The current output range of the transmitter 2 can be, for example, 4mA~20mA, and the remote terminal 3 can convert the received current signal into a position feedback signal of 0% (which can correspond to, for example, 4mA)~100% (which can correspond to, for example, 20mA) and transmit it to, for example, a digital meter of the remote terminal 3 for display of the position information, wherein 0% can correspond to the fully closed position of the cylinder 1 (the cylinder piston moves to the minimum position of its stroke), and 100% can correspond to the fully open position of the cylinder 1 (the cylinder piston moves to the maximum position of its stroke). In this way, the current working position of the cylinder 1 can be fed back according to the value displayed on the digital meter, so as to facilitate subsequent inspection work or daily maintenance work.

[0027] It should be noted that, reference Figure 2 As shown, when the reed switch 220 (two reeds of the reed switch) of the reed switch remote transmitter 2 is not under the magnetic force of the magnetic member 140, the two reeds are in the position of Figure 2 The disconnected state is shown in FIG. 2 . When the magnetic force of the magnetic member 140 acts on the reed switch 220 (the two reeds of the reed switch) at the corresponding position, an N pole is generated on the contact of one reed and an S pole is generated on the contact of the other reed. As a result, the N pole and the S pole are attracted to each other and the elastic resistance of the reed is overcome and the reed moves to the position shown in FIG. Figure 3As shown in the closed state, when the magnetic member 140 moves away from the reed switch 220 at the corresponding position, the magnetic force continues to weaken, and the two reeds will return to the disconnected state under the action of the elastic force. In this way, when the magnetic member 140 moves to different positions along with the piston 130, the disconnected and closed states of the two reeds at different positions can be switched. In this way, due to the switching of the disconnected and closed states of the two reeds at different positions, the resistance value of the connecting circuit in the reed switch remote transmitter 2 will continue to change, and the reed switch remote transmitter 2 can convert the change in the resistance value into the above-mentioned current or voltage signal to the remote terminal 3. Among them, the specific structure of the above-mentioned reed switch remote transmitter 2 is not specifically limited in this disclosure. Those skilled in the art can select a reed switch remote transmitter 2 of any structure known in the art according to actual application requirements. The purpose is to be able to realize the switching of the two reeds between the open and closed states under the magnetic force of the magnetic part 140, and to realize the ability to convert the change of the resistance value in the circuit into a current or voltage signal to the remote terminal 3, so as to realize the feedback of the current working position of the cylinder 1.

[0028] In addition, the above-mentioned remote terminal 3 can be a DCS control system, and can be connected to the above-mentioned reed switch remote transmitter 2 signal through, for example, wireless or wired means. In this way, the cooperation between the reed switch remote transmitter 2 and the DCS control system can realize feedback on the current working position of the cylinder 1, so as to facilitate subsequent inspection work or daily maintenance work.

[0029] Among them, the above-mentioned remote terminal 3 can also be, for example, a PLC control system or a single-chip microcomputer. In addition, the signal connection method and data transmission method between the remote terminal 3 and the reed switch remote transmitter 2, and the remote terminal 3 can convert the received current signal into a position feedback signal of 0% (which can correspond to, for example, 4mA) ~ 100% (which can correspond to, for example, 20mA) and transmit it to, for example, a digital meter of the remote terminal 3 for displaying the position information, etc. are all control systems known in the art that can be implemented and will not be elaborated on here.

[0030] In some embodiments, reference Figures 1 to 3 As shown, multiple reed switches 220 can be arranged at equal intervals along the first direction to achieve uniform changes in the output current or voltage signal of the reed switch remote transmitter 2, which helps to improve the measurement accuracy of the reed switch remote transmitter 2 and facilitates accurate confirmation of the current working position of the cylinder 1.

[0031] In addition, in some embodiments, reference Figure 1As shown, the housing 210 may have a first end 211 and a second end 212 arranged relative to each other along a first direction, the second end 212 being formed with a bent portion 213 extending outwardly toward a side away from the cylinder body 110, and the end of the bent portion 213 being provided with a transmitter header 214 for connecting a signal to the remote terminal 3. In this way, the above arrangement can avoid the problem of installation interference between the housing 210 of the reed switch remote transmitter 2 and the cylinder body 110 of the cylinder 1, thereby facilitating installation operations. The present disclosure does not specifically limit the specific structure of the housing 210, and those skilled in the art can adaptably design it according to actual application requirements, with the goal of being able to achieve a fit arrangement with the outer wall of the cylinder body 110.

[0032] In addition, in some embodiments, reference Figure 1 As shown, a connecting portion 4 for connecting to the outer shell 210 can be provided on the outer wall of the cylinder body 110. For example, the connecting portion 4 can be constructed as a cable tie 410, and the cable tie 410 is wrapped around the cylinder body 110 and the outer shell 210. The structure is simple and easy to install. In this way, the outer shell 210 is stably fitted and arranged on the outer wall of the cylinder body 110 through the cable tie 410, and the reliability is high.

[0033] Among them, the above-mentioned cable tie 410 can be a stainless steel cable tie to ensure that the cable tie 410 has high heat resistance and corrosion resistance, and the overall structural strength is high, which helps to ensure that the cable tie 410 is used in special working conditions with high temperature or high corrosion.

[0034] In addition, if Figure 1 As shown, there may be a plurality of cable ties 410 , and the plurality of cable ties 410 are arranged at intervals along the first direction, which helps to improve the reliability of the connection between the housing 210 and the cylinder body 110 .

[0035] It should be noted that the present disclosure does not specifically limit the specific structure and material of the above-mentioned cable tie 410. Those skilled in the art can adaptively design the specific structure and material of the cable tie 410 according to the actual application scenario and usage requirements. The purpose is to be able to use the cable tie 410 to stably fit the shell 210 on the outer wall of the cylinder body 110.

[0036] In addition, the specific embodiment in which the above-mentioned connecting portion 4 is constructed as a cable tie 410 is illustrative. In other embodiments not shown in the figures, the above-mentioned connecting portion 4 can also be constructed as a connecting seat, so that the outer shell 210 is connected to the cylinder body 110 through the connecting seat with fasteners such as bolts. The present disclosure is not limited to this. The purpose is to enable the outer shell 210 to be stably fitted on the outer wall of the cylinder body 110.

[0037] In some embodiments, reference Figure 1 As shown, the magnetic part 140 may include a magnetic ring 141, which is sleeved on the outer peripheral wall of the piston 130 and is arranged centrally relative to the piston 130. In this way, during the reciprocating linear motion of the piston 130 and the piston rod 120 in the cylinder 1, the magnetic ring 141 on the piston 130 can be driven to move, so that the magnetic force of the magnetic ring 141 acts on the reed switch 220 at the corresponding position, so that the position of the piston 130 relative to the cylinder body 110 can be detected through the reed switch remote transmitter 2, so that on-site personnel can accurately judge the current working position of the cylinder, which is convenient for subsequent on-site personnel to carry out maintenance work or daily maintenance work of the cylinder.

[0038] It should be noted that the magnetic ring 141 can be made of, for example, an ordinary magnet or an electromagnet or other magnetic conductor that can generate magnetism when energized. The present disclosure does not specifically limit such deformation methods. Its purpose is to enable the magnetic force of the magnetic ring 141 to act on the reed switch 220 at different positions to realize the switching of the open and closed states of the two reeds of the reed switch 220 at different positions, so that the resistance value of the connecting circuit in the reed switch remote transmitter 2 continuously changes. The reed switch remote transmitter 2 can then convert the change in the resistance value into the above-mentioned current or voltage signal to the remote terminal 3, so that the position of the piston 130 relative to the cylinder body 110 can be detected by the reed switch remote transmitter 2.

[0039] In addition, the specific structure of the cylinder 1 can be adaptively designed according to actual application requirements. Its purpose is to enable compressed air to enter the inlet at either the front or rear end of the cylinder body 110, and to form a pressure difference between the two chambers inside the cylinder body 110, thereby driving the piston 130 inside the cylinder body 110 to move, and to link the piston rod 120 connected to the piston 130 to reciprocate linearly. Those skilled in the art can choose any known cylinder structure according to actual conditions, and the present disclosure does not make specific limitations here.

[0040] According to a second aspect of the present disclosure, a detection system is provided, comprising a remote terminal 3 and the cylinder position detection device provided in the first aspect. The remote terminal 3 is configured to connect signals to the reed switch remote transmitter 2, thereby enabling detection of the position of the piston 130 relative to the cylinder body 110 via the reed switch remote transmitter 2. Furthermore, the position information can be displayed on, for example, a digital meter on the remote terminal 3 to facilitate subsequent inspection or routine maintenance. Furthermore, the detection system also possesses all the beneficial effects of the cylinder position detection device provided in the first aspect, which will not be further elaborated herein.

[0041] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0043] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cylinder position detection device, characterized in that: include: A cylinder comprising a cylinder body extending in a first direction, and a piston movably disposed in the cylinder body and connected to a piston rod along the first direction, wherein the piston is provided with a magnetic member; and The reed switch remote transmitter includes a shell extending along the first direction and arranged in contact with the outer wall of the cylinder body. A plurality of reed switches are arranged in the shell. When the magnetic force of the magnetic member acts on the reed switches at different positions, the position of the piston relative to the cylinder body can be detected by the reed switch remote transmitter.

2. The cylinder position detection device according to claim 1, characterized in that: The plurality of reed switches are arranged at equal intervals along the first direction.

3. The cylinder position detection device according to claim 1, characterized in that: The housing has a first end and a second end arranged opposite to each other along the first direction, the second end is formed with a bent portion extending outward toward the side away from the cylinder body, and the end of the bent portion is provided with a transmitter head for connecting to a remote terminal signal.

4. The cylinder position detection device according to any one of claims 1 to 3, characterized in that: A connecting portion for connecting to the shell is provided on the outer side wall of the cylinder body.

5. The cylinder position detection device according to claim 4, characterized in that: The connecting portion is configured as a cable tie, and the cable tie is wound around the cylinder body and the housing.

6. The cylinder position detection device according to claim 5, characterized in that: The cable tie is a stainless steel cable tie.

7. The cylinder position detection device according to claim 5, characterized in that: There are a plurality of cable ties, and the plurality of cable ties are arranged at intervals along the first direction.

8. The cylinder position detection device according to claim 1, characterized in that: The magnetic member includes a magnetic ring, which is sleeved on the outer peripheral wall of the piston and arranged centrally relative to the piston.

9. A detection system, characterized in that: It comprises a remote terminal and the cylinder position detection device according to any one of claims 1 to 8, wherein the remote terminal is used to connect to the reed switch remote transmitter signal.

10. The detection system according to claim 9, characterized in that: The remote terminal is a DCS control system.

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