Multi-way valve meso-position detection device, multi-way valve and forklift

Abstract

The utility model discloses a multi-way valve neutral position detection device, a multi-way valve and a forklift, a valve rod of the multi-way valve has two working positions, and the neutral position of the valve rod of the multi-way valve is between the two working positions; comprising two light transmitting and receiving units, the two light transmitting and receiving units are arranged on the two sides of a connecting line when a plurality of valve rods of the multi-way valve are located at the middle positions, one light transmitting and receiving unit corresponds to one working position of the valve rods, and the other light transmitting and receiving unit corresponds to the other working position of the valve rods. And when any valve rod of the multi-way valve is located at the working position, the valve rod located at the working position shields light rays emitted by the corresponding light emitting and receiving unit so as to trigger the light emitting and receiving unit. The photoelectric type neutral position detection technology is adopted, the detection precision is high, the environmental adaptability is good, meanwhile, a shading piece does not need to be installed on the valve rod, assembling is more convenient, and the structure is simpler.

Description

Technical Field

[0001] This utility model relates to the field of multi-way valve technology, and in particular to a multi-way valve mid-position detection device, a multi-way valve, and a forklift. Background Technology

[0002] Multi-way valve neutral position detection refers to determining whether the valve stem or valve core of a multi-way valve is in the neutral position using specific detection devices or methods. Currently, commonly used multi-way valve neutral position detection technologies include mechanical neutral position detection, photoelectric neutral position detection, and displacement sensor detection.

[0003] Mechanical neutral position detection typically utilizes changes in the physical position of the valve stem to trigger a detection signal. For example, one neutral position detection structure includes a fixed part, a valve stem, a pressure head, a pressure rod, a contact switch, and a controller. The valve stem has a pressing surface; when the valve stem deviates from the neutral position, the pressing surface drives the pressure head to move the pressure rod and press the contact switch, thereby sending a trigger signal to the controller. Photoelectric neutral position detection...

[0004] Photoelectric centering detection uses the transmission or obstruction of light to determine whether the valve stem is in the center position. For example, a multi-way valve centering identification mechanism includes a sensor that emits light and multiple light-blocking components. The light-blocking components are mounted on the valve stems. When all valve stems are in the center position, the light-transmitting parts of the light-blocking components are aligned, allowing light to pass through. If any valve stem deviates from the center position, the light-blocking component will block the light, triggering the sensor. This detection method has the advantages of low cost, simple installation, and flexible spatial layout, and is widely used in forklifts and other construction machinery.

[0005] Displacement sensor detection determines whether the valve core is in the neutral position by monitoring its displacement changes in real time. The sensor transmits the displacement data to the control system, allowing operators to promptly detect abnormalities based on system feedback. This detection method offers high accuracy and is suitable for applications requiring high control precision.

[0006] The above-mentioned multi-way valve position detection technologies have the following shortcomings: mechanical position detection technology has low detection accuracy; photoelectric position detection technology requires the installation of light-shielding components on each valve stem, resulting in cumbersome installation and an unsimplistic structure; although displacement sensor detection technology has high detection accuracy, it has poor environmental adaptability and is easily affected by external factors such as dust and oil. Utility Model Content

[0007] This utility model addresses the technical problems existing in the prior art by providing a multi-way valve mid-position detection device that is easy to install, has high detection accuracy, and is adaptable to various environments, as well as a multi-way valve and a forklift.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a multi-way valve mid-position detection device, wherein the valve stem of the multi-way valve has two working positions, and the mid-position of the valve stem is between the two working positions; it includes two optical transceiver units, which are respectively located on both sides of the line connecting the multiple valve stems of the multi-way valve when they are in the mid-position, and one optical transceiver unit corresponds to one working position of the valve stem, and the other optical transceiver unit corresponds to the other working position of the valve stem, so that when any valve stem of the multi-way valve is in a working position, the valve stem in the working position blocks the light emitted by the corresponding optical transceiver unit, thereby triggering the optical transceiver unit.

[0009] Furthermore, it also includes a controller and an indicator module, with the output of the optical transceiver unit connected to the controller and the output of the controller connected to the indicator module.

[0010] Furthermore, there are two indicator modules, each corresponding to one of the two optical transceiver units. Each indicator module includes a light indicator module and / or a sound indicator module, and each indicator module is located on the corresponding optical transceiver unit.

[0011] Furthermore, the optical transceiver unit includes an optical transmitter and an optical receiver. When each valve stem of the multi-way valve is in the neutral position, the light emitted by the optical transmitter is received by the optical receiver.

[0012] Furthermore, the light emitter and light receiver are arranged together, and a reflector is also included. The reflector and the light transmitting and receiving unit are located on both sides of the valve stem in the direction of the connecting line. When each valve stem of the multi-way valve is in the neutral position, the light emitted by the light emitter is reflected by the reflector to the light receiver.

[0013] Furthermore, the optical transceiver unit is a photoelectric switch.

[0014] Furthermore, the light emitter and the light receiver are arranged separately, and the light emitter and the light receiver are located on both sides of the valve stem in the direction of the connecting line, and are arranged opposite to each other.

[0015] Furthermore, it also includes a support member corresponding to the optical transceiver unit, the optical transceiver unit being mounted on the support member, and the support member being mounted on the mounting bracket of the multi-way valve.

[0016] This utility model also provides a multi-way valve, including the multi-way valve mid-position detection device as described above.

[0017] This utility model also provides a forklift, including the multi-way valve as described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model includes two optical transceiver units, which are respectively located on both sides of the line connecting the multiple valve stems of the multi-way valve when they are in the neutral position. The optical transceiver unit is triggered by directly blocking the light emitted by the corresponding optical transceiver unit when the valve stem of the multi-way valve is in the working position. Therefore, this utility model adopts photoelectric neutral position detection technology, which has high detection accuracy and good environmental adaptability. At the same time, there is no need to install light-shielding parts on the valve stem, making assembly more convenient and the structure simpler.

[0020] 2. This utility model further includes a controller and an indicator module, enabling the forklift driver to intuitively see the detection results of the optical transceiver unit, thereby providing strong protection for the safe operation of the forklift driver. The indicator module is preferably a light indicator module and / or a sound indicator module, making the indicator module compact, convenient, and easy to install. In particular, when the indicator module is directly mounted on the optical transceiver unit, no additional installation is required.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the present invention, including a multi-way valve mid-position detection device, a multi-way valve, and a forklift, is not limited to the embodiments described herein. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0023] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 3 ;

[0026] In the diagram, 1. Multi-way valve; 11. Valve stem; 12. Mounting bracket; 13. Control lever; 2. Light transceiver unit; 3. Light indicator module; 4. Support component; 5. First bolt assembly; 6. Reflector; 7. Support frame; 8. Second bolt assembly. Detailed Implementation

[0027] In this description of the utility model, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the related objects before and after it have an "or" relationship.

[0028] Please see Figures 1-4 As shown, this utility model discloses a multi-way valve center position detection device. The valve stem 11 of the multi-way valve 1 has two working positions, and the center position of the valve stem 11 of the multi-way valve 1 is between the two working positions. It includes two optical transceiver units 2, which are respectively arranged on both sides of the line connecting the multiple valve stems 11 of the multi-way valve 1 when they are in the center position. One optical transceiver unit 2 corresponds to one working position of the valve stem 11, and the other optical transceiver unit 2 corresponds to the other working position of the valve stem 11. This is so that when any valve stem 11 of the multi-way valve 1 is in a working position, the valve stem 11 in the working position blocks the light emitted by the corresponding optical transceiver unit 2, thereby triggering the optical transceiver unit 2.

[0029] This invention also includes a controller (not shown in the figure) and an indicator module. The output of the optical transceiver unit 2 is connected to the controller, and the output of the controller is connected to the indicator module. Two indicator modules are provided, each corresponding to one of the two optical transceiver units 2. Each indicator module includes a light indicator module and / or a sound indicator module, and each indicator module is located on its corresponding optical transceiver unit 2. In this embodiment, the indicator module is exemplified by the light indicator module 3, which is located on top of the optical transceiver unit 2.

[0030] The optical transceiver unit 2 includes an optical emitter and an optical receiver. When each valve stem 11 of the multi-way valve 1 is in the neutral position, the light emitted by the optical emitter is received by the optical receiver. In this embodiment, the optical emitter and the optical receiver are arranged together; specifically, the optical transceiver unit 2 is a photoelectric switch. This invention also includes a reflector 6, which is located on both sides of the valve stem 11 along the direction of the connection line. When each valve stem 11 of the multi-way valve 1 is in the neutral position, the light emitted by the optical emitter is reflected by the reflector 6 to the optical receiver. In other embodiments, the optical emitter and the optical receiver are arranged separately, and are located on both sides of the valve stem 11 along the direction of the connection line, and are arranged opposite each other.

[0031] This utility model also includes a support member 4 corresponding to the optical transceiver unit 2. The optical transceiver unit 2 is mounted on the support member 4, and the support member 4 is mounted on the mounting bracket 12 of the multi-way valve 1. Therefore, there are two support members 4, each of which is approximately L-shaped, and the vertical sides of the two support members 4 are arranged opposite each other. The two optical transceiver units 2 are respectively mounted on the opposite inner sides of the vertical sides of the two support members 4, and the horizontal sides of the two support members 4 are respectively connected to the mounting bracket 12 of the multi-way valve 1 by the first bolt assembly 5.

[0032] In this embodiment, the two optical transceiver units 2 share the same reflector 6, but this is not a limitation. In other embodiments, there are two reflectors 6, with each reflector 6 corresponding to one of the two optical transceiver units 2. The reflector 6 is mounted on a support frame 7, which is connected to the mounting bracket 12 of the multi-way valve 1 by a second bolt assembly 8.

[0033] This invention relates to a mid-position detection device for a multi-way valve 1. When the forklift key is turned on, each light transmitting and receiving unit 2 (i.e., photoelectric switch) is energized and emits light towards the reflector 6. The light is reflected back to the light transmitting and receiving unit 2 after being reflected by the reflector 6, and received by the light receiver of the light transmitting and receiving unit 2. This causes the light transmitting and receiving unit 2 to output a high-level signal to the controller, which then controls the light indicator module 3 to illuminate a green light, indicating that the valve stem 11 of the multi-way valve 1 is in the mid-position. When any valve stem 11 of the multi-way valve 1 is activated, the valve stem 11 moves away from the mid-position and blocks the light emitted by the corresponding light transmitting and receiving unit 2, preventing the light from reaching the reflector 6 and thus preventing it from being reflected by the reflector 6 and received by the light receiver of the light transmitting and receiving unit 2. Therefore, at this time, the light transmitting and receiving unit 2 outputs a low-level signal to the controller, which then controls the corresponding light indicator module 3 to illuminate a red light, indicating that a valve stem 11 of the multi-way valve 1 is in the working position.

[0034] Therefore, this utility model adopts photoelectric mid-position detection technology, which has the characteristics of high detection accuracy and good environmental adaptability. In particular, this utility model directly uses the valve stem 11 of the multi-way valve 1 in the working position to block the light emitted by the corresponding light transmitting and receiving unit 2 to trigger the light transmitting and receiving unit 2. This eliminates the need to install a light-shielding component on the valve stem 11, resulting in fewer overall parts, easier assembly, and a simpler structure.

[0035] The present invention provides a multi-way valve, including the multi-way valve mid-position detection device as described above.

[0036] For details on the structure and working principle of the multi-way valve neutral position detection device, please refer to the previous description; it will not be repeated here.

[0037] This utility model provides a forklift, which includes the multi-way valve described above.

[0038] This utility model discloses a multi-way valve mid-position detection device, a multi-way valve, and a forklift. The parts not covered herein are the same as or can be implemented using existing technologies.

[0039] The above embodiments are only used to further illustrate the multi-way valve mid-position detection device, multi-way valve and forklift of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A multi-way valve center position detection device, a valve stem of the multi-way valve having two working positions, a center position of the valve stem of the multi-way valve being between the two working positions; characterized in that: The two optical transceiver units are arranged on both sides of the connecting line when the valve stems of the multi-way valve are in the neutral position, and one of the optical transceiver units corresponds to one of the working positions of the valve stems, and the other optical transceiver unit corresponds to the other working position of the valve stems, so that when any valve stem of the multi-way valve is in a working position, the valve stem in the working position blocks the light emitted by the corresponding optical transceiver unit to trigger the optical transceiver unit.

2. The mid position detection device for a multi-way valve according to claim 1, characterized by: The controller is connected to the output of the optical transceiver unit, and the output of the controller is connected to the indication module.

3. The mid position detection device for a multi-way valve according to claim 1, characterized by: The indication module is provided in two, and the two indication modules correspond to the two optical transceiver units one-to-one, and the two indication modules each include a light indication module and / or a sound indication module, and each indication module is arranged on the corresponding optical transceiver unit.

4. The mid position detection device for a multi-way valve according to claim 1, characterized by: The optical transceiver unit includes an optical emitter and an optical receiver, and when each valve stem of the multi-way valve is in the neutral position, the light emitted by the optical emitter is received by the optical receiver.

5. The mid position detection device for a multi-way valve according to claim 4, characterized by: The optical emitter and the optical receiver are arranged together, and further include a reflecting plate arranged on both sides of the optical transceiver unit in the direction of the valve stem along the connecting line, and when each valve stem of the multi-way valve is in the neutral position, the light emitted by the optical emitter is reflected to the optical receiver through the reflecting plate.

6. The mid position detection device for a multi-way valve according to claim 4 or 5, characterized in that: The optical transceiver unit is an optical switch.

7. The mid position detection device for a multi-way valve according to claim 4, characterized by: The optical emitter and the optical receiver are arranged separately, and the optical emitter and the optical receiver are arranged on both sides of the valve stem in the direction of the connecting line and are arranged oppositely.

8. The mid position detection device for a multi-way valve according to claim 1, characterized by: Further including a support corresponding to the optical transceiver unit, the optical transceiver unit is mounted on the support, and the support is mounted on the mounting bracket of the multi-way valve.

9. A multi-way valve characterized by: The multi-way valve neutral position detection device includes the multi-way valve neutral position detection device according to any one of claims 1-8.

10. A fork truck characterized by: The multi-way valve includes the multi-way valve according to claim 9.

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