Visual valve element position monitoring structure and hydraulic valve

Abstract

The invention discloses a visual valve element position monitoring structure and a hydraulic valve, and relates to the technical field of hydraulic transmission control, the visual valve element position monitoring structure comprises a valve element, an electronic switch and a contact piece, the contact piece is used for being arranged on the valve element, the electronic switch is used for being arranged on a valve sleeve, and the electronic switch is used for being arranged on the valve sleeve. And the contact piece can be in contact with a roller on the electronic switch. The hydraulic valve comprises a valve sleeve, an elastic element, a cover plate and a visual valve element position monitoring structure, the cover plate is arranged on the valve sleeve, a valve element is arranged in the valve sleeve, the valve element and the valve sleeve can slide relatively, a valve rod is sleeved with the elastic element, the lower end of the elastic element makes contact with the valve element, and the visual valve element position monitoring structure is arranged in the valve sleeve. The upper end of the elastic element makes contact with the cover plate, and the electronic switch is used for being arranged on the cover plate. The visual valve element position monitoring structure and the hydraulic valve are high in reliability, high in intuition, high in anti-jamming capability and convenient to maintain.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic transmission control technology, and in particular to a visual valve core position monitoring structure and a hydraulic valve, which are mainly used for detecting and monitoring the working status of hydraulic valves such as hydraulic cartridge valves and hydraulic filling valves of the visual valve core position monitoring structure. Background Art

[0002] With the improvement of equipment safety requirements, more and more host equipment requires the hydraulic components of their hydraulic systems to have status monitoring functions. At present, non-contact inductive monitoring components are mostly used in hydraulic valve control systems to monitor the position of the hydraulic valve core. This method can only judge the position of the valve core by the on-off of the electromagnetic signal. It has the defects of poor anti-electromagnetic interference ability, poor intuitiveness, and difficult fault detection. At the same time, the electromagnetic components themselves have the inherent characteristics of zero drift and temperature drift, resulting in low working reliability and affecting the safety of the host equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a visual valve core position monitoring structure and a hydraulic valve, which have high reliability, strong intuitiveness, strong anti-interference ability and convenient maintenance.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a visual valve core position monitoring structure, comprising: a valve core, an electronic switch and a contact piece, wherein the contact piece is used to be arranged on the valve core, the electronic switch is used to be arranged on the valve sleeve, and the contact piece can contact with a roller on the electronic switch.

[0006] Preferably, a valve stem is provided in the valve core, the lower end of the valve stem is threadedly connected to the valve core, and the upper end of the valve stem is used to be connected to a contact sheet.

[0007] Preferably, the upper end of the valve stem is threadedly connected to the lower end of the screw and the position of the screw is fixed by a first nut on the screw, the contact piece is sleeved on the screw, and the position of the contact piece is fixed by a second nut on the screw.

[0008] Preferably, the contact piece is provided with an inclined surface, and the inclined surface is used to contact the roller on the electronic switch.

[0009] The present invention also provides a hydraulic valve, including a valve sleeve, an elastic element, a cover plate and a visual valve core position monitoring structure, wherein the cover plate is arranged on the valve sleeve, the valve core is arranged in the valve sleeve, the valve core and the valve sleeve can slide relative to each other, the elastic element is sleeved on the valve stem, the lower end of the elastic element contacts the valve core, the upper end of the elastic element contacts the cover plate, and an electronic switch is used to be arranged on the cover plate.

[0010] Preferably, the lower end surface of the cover plate can contact the upper end surface of the valve core.

[0011] Preferably, the electronic switch is connected to the cover plate via a bracket.

[0012] Preferably, an end cover is sleeved on the valve stem, and the end cover is located between the valve stem and the cover plate.

[0013] Preferably, a sealing ring is provided between the end cover and the valve stem, and the valve stem and the end cover are slidably and sealingly connected.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The visual valve core position monitoring structure of the present invention has both electronic monitoring and visual monitoring functions. It can determine the position of the valve core through electrical signal conversion, and can also directly observe the movement of the valve core. The two are mutually backed up, and have the characteristics of high reliability, strong intuitiveness, strong anti-interference ability, and convenient maintenance. It significantly improves the reliability of the hydraulic component monitoring device and is conducive to fault judgment and equipment maintenance. This technical solution can be widely used for the working status monitoring of various hydraulic valves such as cartridge valves and liquid filling valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a hydraulic valve with a visual valve core position monitoring structure of the present invention;

[0018] In the figure: 1-valve sleeve, 2-valve core, 3-valve stem, 4-spring, 5-cover plate, 6-end cover, 7-screw, 8-contact sheet, 9-second nut, 10-first nut, 11-electronic switch, 12-bracket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a visual valve core position monitoring structure and a hydraulic valve, which have high reliability, strong intuitiveness, strong anti-interference ability and convenient maintenance.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1

[0023] like Figure 1 As shown, this embodiment provides a visual valve core position monitoring structure, including: a valve core 2, a valve stem 3, an electronic switch 11 and a contact piece 8, the valve stem 3 is arranged in the center hole of the valve core 2, the contact piece 8 is used to be arranged on the valve stem 3, the electronic switch 11 is used to be arranged on the valve sleeve 1, and the contact piece 8 can contact the roller on the electronic switch 11.

[0024] Specifically, in this embodiment, a valve stem 3 is provided in the valve core 2, the lower end of the valve stem 3 is threadedly connected to the valve core 2, the upper end of the valve stem 3 is threadedly connected to the lower end of the screw rod 7, and the position of the screw rod 7 is fixed by a first nut 10 on the screw rod 7, the contact piece 8 is provided with a center hole, the contact piece 8 is sleeved on the screw rod 7, and the position of the contact piece 8 is fixed by a second nut 9 on the screw rod 7.

[0025] In this embodiment, the contact piece 8 is provided with an inclined surface, and the inclined surface is used to contact the roller on the electronic switch 11 .

[0026] The working principle of the visual valve core position monitoring structure of this embodiment is as follows: after all parts are assembled, the lower end of the valve core 2 contacts the valve seat of the valve sleeve 1 under the action of the elastic force of the spring 4. At this time, the height of the screw 7 is adjusted so that the contact piece 8 contacts and presses the roller of the electronic switch 11, so that the electronic switch 11 sends an electric signal, indicating that the hydraulic valve is in a closed state. The first nut 10 tightly connects the screw 7 with the valve stem 3, and the second nut 9 tightly connects the contact piece 8 with the screw 7. When the valve core 2 moves upward, the valve port opens, the contact piece 8 is out of contact with the roller of the electronic switch 11, and the electronic switch 11 no longer sends an electric signal, indicating that the hydraulic valve is in an open state. By using this embodiment, the state of the hydraulic valve can be observed from the changes in the electric signal of the electronic switch 11 and the position of the contact piece 8 at the same time.

[0027] The visual valve core position monitoring structure of this embodiment has both electronic monitoring and visual monitoring functions. It can determine the position of the valve core 2 through electrical signal conversion, and can also directly observe the movement of the valve core 2. The two are mutually backed up, with high reliability, strong intuitiveness, strong anti-interference ability, and convenient maintenance. It significantly improves the reliability of the hydraulic component monitoring device and is conducive to fault judgment and equipment maintenance. This technical solution can be widely used for the working status monitoring of various hydraulic valves such as cartridge valves and liquid filling valves.

[0028] Embodiment 2

[0029] like Figure 1 As shown, this embodiment provides a hydraulic valve, including: a valve sleeve 1, an elastic element, a cover plate 5 and a visualized valve core position monitoring structure of embodiment 1, the cover plate 5 is arranged on the valve sleeve 1, the lower end surface of the cover plate 5 contacts the upper end surface of the valve sleeve 1, the cover plate 5 is provided with a through center hole, the valve stem 3 passes through the center hole of the cover plate 5, the lower end surface of the cover plate 5 can contact the upper end surface of the valve core 2, the valve core 2 is arranged in the center hole of the valve sleeve 1, the valve core 2 and the valve sleeve 1 can slide relative to each other, the lower end of the valve core 2 contacts the valve seat of the valve sleeve 1 to realize the closing of the valve, the valve stem 3 and the elastic element are both arranged in the center hole of the valve core 2, the elastic element is sleeved on the valve stem 3, the elastic element is preferably a spring 4, one end of the elastic element contacts the valve core 2, and the other end of the elastic element contacts the cover plate 5, and the electronic switch 11 is used to be arranged on the cover plate 5.

[0030] Specifically, in this embodiment, the electronic switch 11 is connected to the cover plate 5 via a bracket 12 disposed on the upper end surface of the cover plate 5 .

[0031] In this embodiment, an end cover 6 is sleeved on the valve stem 3, and the end cover 6 is sleeved on the valve stem 3 and located at the center hole of the cover plate 5. A sealing ring is provided between the end cover 6 and the valve stem 3, and the valve stem 3 and the end cover 6 are slidably and sealedly connected.

[0032] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A visual valve core position monitoring structure, characterized in that: include: A valve core, an electronic switch and a contact sheet, wherein the contact sheet is used to be arranged on the valve core, the electronic switch is used to be arranged on the valve sleeve, and the contact sheet can contact the roller on the electronic switch.

2. The visual valve core position monitoring structure according to claim 1 is characterized in that: A valve stem is arranged in the valve core, the lower end of the valve stem is threadedly connected to the valve core, and the upper end of the valve stem is used to be connected to a contact sheet.

3. The visual valve core position monitoring structure according to claim 2 is characterized in that: The upper end of the valve stem is threadedly connected to the lower end of the screw and the position of the screw is fixed by a first nut on the screw. The contact piece is sleeved on the screw and the position of the contact piece is fixed by a second nut on the screw.

4. The visual valve core position monitoring structure according to claim 1 is characterized in that: The contact piece is provided with an inclined surface, and the inclined surface is used to contact the roller on the electronic switch.

5. A hydraulic valve, characterized in that: It includes a valve sleeve, an elastic element, a cover plate and a visual valve core position monitoring structure as described in any one of claims 1 to 4, the cover plate is arranged on the valve sleeve, the valve core is arranged in the valve sleeve, the valve core and the valve sleeve can slide relative to each other, the elastic element is sleeved on the valve stem, the lower end of the elastic element contacts the valve core, the upper end of the elastic element contacts the cover plate, and an electronic switch is used to be arranged on the cover plate.

6. The hydraulic valve according to claim 5, characterized in that: The lower end surface of the cover plate can contact the upper end surface of the valve core.

7. The hydraulic valve according to claim 5, characterized in that: The electronic switch is connected to the cover plate through a bracket.

8. The hydraulic valve according to claim 5, characterized in that: An end cover is sleeved on the valve stem, and the end cover is located between the valve stem and the cover plate.

9. The hydraulic valve according to claim 8, characterized in that: A sealing ring is arranged between the end cover and the valve stem, and the valve stem and the end cover are slidably and sealedly connected.

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